JP2021134854A - In-line strainer - Google Patents

Abstract

To target an in-line strainer comprising a valve cap for opening and closing a foreign matter discharge port provided in a housing for improvement so that the foreign matter discharge port can be quickly opened and closed by the valve cap.SOLUTION: A valve cap 5 is attached to a cylindrical protrusion part 10 provided in the middle of the length of a housing 2 by providing a bayonet connection part 15. The bayonet connection part 15 is a combination of a locking projection 16 and a guide groove 17 composed of a vertical groove 17a, a first horizontal groove 17b, and a second horizontal groove 17c having a step with respect to the first horizontal groove 17b. The valve cap 5 urged in a valve opening direction by the spring 6 is coupled to the cylindrical protrusion part 10 by the bayonet connection part 15.SELECTED DRAWING: Figure 1

Description

The present invention comprises an in-line strainer that is incorporated into a piping line for plant cultivation to filter foreign substances in liquids such as pesticides and water supplied through the piping line, specifically, a valve cap that opens and closes a foreign matter discharge port. It relates to an in-line strainer that enables quick opening and closing of a foreign matter discharge port by a valve cap.

As a prior art of the above-mentioned inline strainer, there is one shown in Patent Document 1 below. The inline strainer of Patent Document 1 was developed and proposed by the applicant.
It has a tubular housing having an inlet for the liquid to be filtered at one end, an outlet at the other end, and a foreign matter discharge port on the outer periphery in the middle of the longitudinal direction.

Further, a swirling flow generating component installed inside the housing, a tubular filter element connecting the opening end on the inflow side to the swirling flow generating component, and a dust collecting cylinder connecting the opening end on the outflow side of the filter element. A valve cap for closing the foreign matter discharge port is provided, and an outlet provided on the outer periphery of the dust collecting cylinder is connected to the foreign matter discharge port.

In this in-line strainer, the liquid to be filtered introduced into the housing from the upstream side of the piping line passes through the inside of the swirling flow generating component, becomes a swirling flow, and is introduced into the cylinder of the filter element.

Then, the liquid filtered through the cylinder (filter wall) of the filter element reaches the outlet from the passage outside the cylinder and is returned to the downstream side of the piping line.

Further, the foreign matter remaining inside the filter element is washed away by the swirling flow inside the element and taken into the dust collecting cylinder. When the amount of dust collected increases, the foreign matter in the dust collecting cylinder is operated by operating the valve cap to open the foreign matter discharging port and is taken out from there.

Japanese Unexamined Patent Publication No. 2014-178000

In the conventional in-line strainer described above, the valve cap is attached to the housing by a method of screwing.

The foreign matter discharge port is composed of a pipe joint having a male screw machined on the outer circumference, and the valve cap is screwed into the pipe joint.

The foreign matter discharge port is closed when the valve cap is at the screwing end point. The blockage of the foreign matter discharge port is released by loosening the valve cap halfway, and by opening the foreign matter discharge port, foreign matter taken into the dust collecting cylinder is released to the outside through the discharge hole provided in the valve cap. It is discharged.

In this way, the conventional in-line strainer adopts a method of loosening the valve cap screwed into the housing halfway to discharge the foreign matter in the dust collecting cylinder to the outside, but the valve is released by the time the foreign matter discharge port is fully opened. It is necessary to rotate the cap several times, and it is also necessary to rotate the valve cap to reclose the foreign matter discharge port.

In a spray device such as a boom sprayer equipped with a large number of spray nozzles, an in-line strainer may be attached to each spray nozzle, and for such a spray device, the effort required to discharge foreign matter from each in-line strainer cannot be ignored. become.

An object of the present invention is to make the above-mentioned in-line strainer an object of improvement so that the foreign matter discharge port can be easily opened and closed by operating a valve cap.

In order to solve the above problems, the present invention provides the following inline strainers 1) and 2).

1) A cylindrical housing having a liquid inlet and outlet at one end and an end, and a cylindrical protrusion having a foreign matter discharge port in the middle in the longitudinal direction, and a swirling flow generator on one end side. The other end side is a tapered cone-shaped cylinder with a gradually reduced diameter, and a cyclone dust collecting cylinder with an outlet provided on the outer circumference near the closed small-diameter end, a bottomed cylinder-shaped filter element, and the cylindrical protrusion. It has a valve cap that is fitted on the outside to open and close the foreign matter discharge port, and a spring that urges the valve cap in the valve opening direction.
The cyclone dust collector is arranged inside the housing with one end facing the outlet side, and one end is closed.
The filter element is arranged inside the one end side of the cyclone dust collecting cylinder and connected to the outlet.
The outlet of the cyclone dust collector is connected to the foreign matter discharge port,
The liquid to be filtered introduced into the housing is introduced into the cyclone dust collector through the swirling flow generator.
The liquid introduced into the cyclone dust collector passes through the filter element and reaches the outlet.
Foreign matter in the liquid that has flowed into the inside of the cyclone dust collector flows into the small-diameter end side of the cyclone dust collector and accumulates.
The valve cap is attached to the cylindrical protrusion by a bayonet connection portion, and the bayonet connection portion includes a locking protrusion provided on the inner surface of the peripheral wall of the valve cap and a guide formed on the outer periphery of the cylindrical protrusion. Consists of a groove
The guide groove includes a vertical groove that allows the locking projection to enter in the axial direction, a first horizontal groove that extends in the circumferential direction from the end of the vertical groove, and a second horizontal groove that is continuous with a step at the end of the first horizontal groove. ,
The valve cap closes the foreign matter discharge port at a position where the locking projection enters the second lateral groove and is held in the second lateral groove.
The foreign matter discharge port opens at a position where the locking projection enters the first horizontal groove and is held in the first horizontal groove, and the foreign matter in the dust collecting cylinder passes through the discharge hole provided in the valve cap. Is discharged to the outside
The movement of the locking projection from the vertical groove to the first horizontal groove is made by rotating the valve cap.
An in-line strainer configured so that the locking projection is moved from the first lateral groove to the second lateral groove by pushing the valve cap in the valve closing direction and rotating the valve cap.

2) A collection having a cylindrical housing having a liquid inlet and outlet at one end and an end, a cylindrical protrusion having a foreign matter discharge port in the middle in the longitudinal direction, and a swirling flow generator on the inlet side. It has a dust cylinder, a tubular filter element, a valve cap that is fitted onto the cylindrical protrusion to open and close the foreign matter discharge port, and a spring that urges the valve cap in the valve opening direction.
The swirling flow generator, the filter element, and the dust collecting cylinder connected to the outlet side opening of the filter element are installed inside the housing, and the outlet provided on the outer periphery of the dust collecting cylinder is a foreign substance. Connected to the outlet,
The liquid to be filtered introduced into the housing is introduced into the filter element through the swirling flow generating component, and the liquid that has passed through the filter element reaches the outlet from the passage on the outer periphery of the filter element to reach the outlet of the filter element. Foreign matter remaining inside is taken into the dust collector.
An in-line strainer in which the valve cap is attached to the cylindrical protrusion by a bayonet connection portion, and the bayonet connection portion is the same as the bayonet connection portion of the in-line strainer described in 1) above.

The in-line strainers of 1) and 2) are the corner portion where the groove end surface on the guide groove entrance side of the first horizontal groove and the vertical groove intersect, the groove end surface on the guide groove entrance side of the second horizontal groove, and the first. The corner portion where the lateral grooves intersect is provided with a stopper projecting toward the root side of the cylindrical protrusion, and the locking projection is moved from the vertical groove to the first lateral groove and the locking projection is said to be the first. It is preferable that the movement from the 1 lateral groove to the 2nd lateral groove is performed at a position overcoming the stopper.

It is preferable to provide two sets of the locking projection and the guide groove on the valve cap and the cylindrical protrusion in a centrally symmetrical arrangement.

In the in-line strainer of the present invention, a valve cap is fitted in a bayonet to a cylindrical protrusion of a housing having a foreign matter discharge port, and the valve cap is rotated to move the locking protrusion from the second lateral groove to the first lateral groove. As a result, the valve cap is pushed by the spring and moves toward the tip side (valve opening direction) of the cylindrical protrusion, whereby the foreign matter discharge port closed by the valve cap is opened.

Further, when the valve cap is pushed and rotated in a direction resisting the force of the spring (valve closing direction) to move from the first lateral groove to the second lateral groove, the valve cap closes the foreign matter discharge port.

The amount of rotation of the valve cap when opening and closing the foreign matter discharge port may be small (for example, less than 45 °), and the operation of opening and closing the foreign matter discharge port becomes easier as compared with the conventional product in which the valve cap is rotated several times.

The corner portion of the groove end surface on the guide groove entrance side of the first lateral groove and the corner portion of the groove end surface on the guide groove entrance side of the second lateral groove provided with the stopper are the first of the locking projections. 2 The position is reliably maintained in the lateral groove and the first lateral groove, and the valve cap does not close the foreign matter discharge port or unintentionally fluctuate the open state.

As described above, according to the in-line strainer of the present invention, the valve cap is attached to the housing by providing the bayonet connection portion, and further, by devising the shape of the bayonet connection portion, the valve cap can be rotated by a small amount. Since the foreign matter discharge port can be opened and closed with, it is easier to open and close the foreign matter discharge port compared to the conventional product with a valve cap screwed, and a spraying device with an in-line strainer attached to each of many spray nozzles. Especially in the spraying system, it is possible to significantly reduce the labor required for removing the strained foreign matter.

It is sectional drawing which shows one form of the in-line strainer of this invention. It is an exploded perspective view of the element excluding the end cap of the in-line strainer of FIG. It is sectional drawing of the part along the line AA of FIG. It is a perspective view which shows the component of the bayonet connection part of FIG. It is a figure which shows the side surface of the guide groove of the bayonet connection part of FIG. 1 and the cross section of the locking projection installation part of a valve cap. It is a perspective breaking view which shows the attached state of a valve cap in the state which the foreign matter discharge port is opened. It is sectional drawing which shows the other form of the in-line strainer of this invention.

An embodiment of the in-line strainer of the present invention will be described with reference to FIGS. 1 to 7 of the accompanying drawings.

The in-line strainer 1 illustrated in FIG. 1 is a combination of a tubular housing 2, a cyclone dust collecting cylinder 3, a bottomed tubular filter element 4, a valve cap 5, and a spring 6.

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 in the middle of the longitudinal direction. Further, a cylindrical protrusion 10 is provided on the outer periphery near the inflow port 7 so as to project in a direction perpendicular to the longitudinal direction, and the hole of the cylindrical protrusion 10 serves as a foreign matter discharge port 9.

Reference numeral 11 denotes an end cap detachably attached to the outlet side of the housing 2, and the end cap 11 is provided with a pipe joint PJ for connecting to a piping line and an outlet 8. Further, an elastic packing 12 is interposed between the end cap 11 and the cylinder of the housing 2. The packing 12 also includes a packing 12 that seals a connection portion of the pipe joint PJ to the piping line.

As shown in FIG. 2, the cyclone dust collector 3 has a swirling flow generating portion 3a on one end side having a straight cylindrical shape, and the other end side is a tapered cone-shaped cylinder with a gradually reduced diameter and is closed. An outlet 3c is provided on the outer circumference near the small diameter end 3b.

As shown in FIG. 1, the cyclone dust collecting cylinder 3 is arranged inside the housing 2 with one end side facing the outlet 8 side. The cyclone dust collecting cylinder 3 is stopped by the positioning portion 13 and is positioned at a position where the outlet 3c is connected to the foreign matter discharging port 9 of the housing 2.

As shown in FIG. 2, the positioning unit 13 is provided with a projecting piece 13a at a centrally symmetrical position on the outer periphery of the cyclone dust collecting cylinder 3 and a vertically long guide groove 13b at a centrally symmetrical position on the inner surface of the housing 2, respectively. As shown in FIG. 3, an example is shown in which the guide groove 13b is fitted into the guide groove 13b, but the present invention is not limited to this.

As shown in FIG. 1, the opening at one end of the cyclone dust collecting cylinder 3 is liquid-tightly closed by the packing 12, and an inflow port 7 is provided between the outer circumference of the cyclone dust collecting cylinder 3 and the body cylinder of the housing 2. An open passage 14 is created.

The filter element 4 is arranged inside the one end side (rectangular cylindrical portion) of the cyclone dust collecting cylinder 3 by connecting the opening end side provided with the flange 4a to the outlet 8.

The illustrated in-line strainer 1 is used in the posture shown in FIG. 1, that is, in an upright state with the inflow port 7 down and the outflow port 8 up.

The swirling flow generating unit 3a is created by opening an opening O for introducing the liquid in the passage 14 inward in the tangential direction in the straight cylindrical portion of the cyclone dust collecting cylinder 3, and the liquid introduced from the opening O. Swirls along the inner surface of the right-sided cylindrical portion, forms a spiral flow, and flows toward the small-diameter end 3b side of the cyclone dust collecting cylinder 3.

Then, it reverses in the middle, passes through the filter element 4, and reaches the outlet 8. Further, the foreign matter having a specific gravity larger than that of the liquid flows to the small-diameter end 3b side of the cyclone dust collecting cylinder 3 while swirling by centrifugal force, and is deposited inside the small-diameter end 3b side.

The valve cap 5 is a bottomed tubular cap provided with a peripheral wall 5a and an end wall 5b (see FIGS. 4 to 6 at the same time). The end wall 5b is located at one end of the peripheral wall 5a, and the end wall 5b is provided with a discharge hole 5c for passing foreign matter. A seal ring 5d (see FIGS. 1 and 6) is attached to the end wall 5b.

In this in-line strainer 1, the liquid to be filtered introduced into the housing 2 from the inflow port 7 connected to the upstream side of the piping line (not shown) reaches the upper part of the passage 14, and the opening O of the swirling flow generating portion 3a Is introduced into the cyclone dust collector 3 to form a swirling flow, and the liquid from which most of the foreign matter has been separated is filtered by the filter element 4 from the outlet 8 to the downstream side of the piping line (the side closer to the spray nozzle (not shown)). Flow out to.

The above configuration does not characterize the present invention. That is, the illustrated in-line strainer 1 is different from the conventional product in the parts described below.

The difference from the conventional product is that the valve cap 5 is attached to the cylindrical protrusion 10 by providing the bayonet connecting portion 15 shown in detail in FIGS. 4 and 5, and the spring 6 is additionally added. be. The spring 6 urges the valve cap 5 in the direction of coming out of the cylindrical protrusion 10.

The bayonet connecting portion 15 includes an element shown in FIG. 5, that is, a locking protrusion 16 provided on the valve cap 5 (inner surface of the peripheral wall 5a) and a guide groove 17 formed on the outer periphery of the cylindrical protruding portion 10.

The guide groove 17 is formed from a vertical groove 17a (see FIGS. 4 and 5) in which one end of the locking projection 16 is open to the end surface (protruding end) of the cylindrical protrusion 10 and the end of the vertical groove 17a. The groove is provided with a first lateral groove 17b extending in the circumferential direction and a second lateral groove 17c connected to each other with a step at the end of the first lateral groove 17b.

The first lateral groove 17b and the second lateral groove 17c are grooves that receive and lock the locking projection 16. The position where the valve cap 5 placed on the protruding end side of the cylindrical protrusion 10 is pushed toward the root side (left side in FIG. 5) of the cylindrical protrusion 10 and the locking protrusion 16 reaches the end of the vertical groove 17a. The valve cap 5 is rotated by.

By the operation, the locking projection 16 enters the first lateral groove 17b. Next, at the position where the locking projection 16 hits the groove side surface f1 (see FIG. 5) of the first lateral groove 17b, the valve cap 5 is further pushed toward the root side of the cylindrical protrusion 10 until movement is restricted.

Then, the valve cap 5 is rotated again there. As a result, the locking projection 16 enters the second lateral groove 17c. When the valve cap 5 is released from being pushed in at that position, the locking projection 16 comes into contact with the groove end surface f2 (see FIG. 5) on the guide groove entrance side of the second lateral groove 17c and is held in the second lateral groove 17c.

In a state where the locking projection 16 is held in the second lateral groove 17c, the seal ring 5d is pressed against the end surface of the cylindrical protrusion 10 as shown in FIG. Therefore, the foreign matter discharge port 9 is closed from the connection with the outside by the seal ring 5d.

Further, in a state where the locking projection 16 is in contact with the groove end surface f3 (see FIG. 5) on the guide groove entrance side of the first lateral groove 17b and is held in the first lateral groove 17b, the seal ring 5d is as shown in FIG. The foreign matter discharge port 9 is opened apart from the end surface of the cylindrical protrusion 10, and the foreign matter in the cyclone dust collecting cylinder 3 is discharged to the outside through the discharge hole 5c provided in the valve cap 5.

The illustrated bayonet connecting portion 15 is a corner portion where the groove end surface f3 of the first lateral groove 17b and the vertical groove 17a intersect, and a corner portion where the groove end surface f2 on the guide groove entrance side of the second lateral groove 17c and the first lateral groove 17b intersect. A stopper 18 projecting toward the root side of the cylindrical projecting portion 10 is provided.

The stopper 18 has a protrusion amount toward the root side of the cylindrical protrusion 10 when the locking protrusion 16 is moved from the vertical groove 17a to the first horizontal groove 17b and when the first horizontal groove 17b is moved to the second horizontal groove 17c. Alternatively, the size is set so that the locking projection 16 can be overcome when it is moved in the opposite direction to the above.

With this stopper 18, the stopper 18 blocks the unexpected rotation of the valve cap 5 when the locking projection 16 is held in the first lateral groove 17b and when it is held in the second lateral groove 17c, and a foreign substance is present. Unintentional fluctuations in the closed and open states of the discharge port 9 are prevented.

In the example in-line strainer 1 configured as described above, when the captured foreign matter has accumulated to some extent inside the cyclone dust collecting cylinder 3, the valve cap 5 blocking the foreign matter discharging port 9 is slightly pushed in, and the locking projection 16 is used. Is rotated to a position where the second lateral groove 17c moves to the first lateral groove 17b.

Then, the valve cap 5 is released at a position where the locking projection 16 hits the groove side surface f4 (see FIG. 5) of the first lateral groove 17b. As a result, the valve cap 5 is pushed by the spring 6 toward the protruding end side of the cylindrical protrusion 10, and the locking protrusion 16 is held at a position in contact with the surface of the first lateral groove 17b on the guide groove entrance side.

FIG. 7 shows another embodiment of the inline strainer of the present invention. The in-line strainer 1A includes a cylindrical housing 2 having an inflow port 7, an outflow port 8, and a foreign matter discharge port 9, a dust collecting cylinder 3A having a swirling flow generating portion 3a on the inflow port side, and a cylindrical filter element 4. , The valve cap 5 and the spring 6 are combined.

The housing 2 is provided with a cylindrical protrusion 10 on which a foreign matter discharge port 9 is formed on the outer periphery near the outlet 8, and other configurations are the same as those of the housing 2 in FIG.

The swirl flow generator 3a is composed of a single component, and the single component is incorporated into the inflow side end portion inside the housing 2. The swirling flow generating unit 3a shown in the drawing has a plurality of twisted passages 3d twisted in a predetermined direction, and a force for rotating the liquid is applied by passing through the twisted passages 3d to apply a force to rotate the liquid to the inside of the filter element 4. A swirling flow is generated to wash away foreign matter adhering to the inner surface of the element.

In the filter element 4 of FIG. 7, the opening end on the inflow port 7 side is connected to a component constituting the swirling flow generation unit 3a, and the dust collecting cylinder 3A is detachably connected to the opening end on the outflow port 8 side.

The dust collecting cylinder 3A is a tapered cone-shaped cylinder whose diameter is gradually reduced from the inflow port 7 side toward the outflow port 8. An outlet 3c is provided on the outer periphery of the dust collecting cylinder 3A on the closed small-diameter end 3b side, and the dust collecting cylinder 3A is prevented from rotating inside the housing 2 at a position where the outlet 3c is connected to the foreign matter discharge port 9. Positioning and holding.

Similar to the inline strainer 1 of FIG. 1, the inline strainer 1A of FIG. 7 is also used in a posture in which the inflow port 7 is at the bottom and the outflow port 8 is at the top.

In this in-line strainer 1A, a passage 14 connected to the outflow port 8 is created between the outer periphery of the filter element 4 and the dust collecting cylinder 3A and the peripheral wall of the housing 2, and the liquid filtered by the filter element 4 passes through the passage. It flows out from the outlet 8 to the downstream side of the piping line through 14.

The structure for attaching the valve cap 5 and the valve cap 5 to the cylindrical protrusion 10 of the housing 2 is the same as that of the in-line strainer 1 of FIG. Therefore, regarding the structure to be attached, the same elements as those in FIG. 1 are designated by the same reference numerals, and re-explanation will be omitted.

As described above, according to the in-line strainer of the present invention, the foreign matter discharge port can be opened and closed by slightly rotating the valve cap, and the foreign matter discharged into the dust collector and the foreign matter discharge port are reclosed. It will be possible to significantly reduce the labor required for this.

1, 1A In-line strainer 2 Housing 3 Cyclone dust collector 3A Dust collector 3a Swirling flow generator O Opening 3b Small diameter end 3c Outlet 3d Twisted passage 4 Filter element 4a Flange 5 Valve cap 5a Peripheral wall 5b End wall 5c Discharge hole 5d Seal ring 6 Spring 7 Inflow port 8 Outlet 9 Foreign matter discharge port 10 Cylindrical protrusion 11 End cap PJ Pipe fitting 12 Packing 13 Positioning part 13a Projection piece 13b Guide groove 14 Passage 15 Bayonet connection part 16 Locking protrusion 17 Guide groove 17a Vertical Groove 17b First lateral groove 17c Second lateral groove 18 Stoppers f1, f4 Groove side surface f2, f3 Groove end surface

Claims (3)

Cylindrical housing (2) having a cylindrical protrusion (10) having a foreign matter discharge port (9) at one end and an end of a liquid inlet (7) and an outlet (8), respectively. A swirling flow generator (3a) is provided on one end side, and a tapered cone-shaped cylinder with a gradually reduced diameter is provided on the other end side, and an outlet (3c) is provided on the outer periphery near the closed small diameter end (3b). A valve cap (3), a bottomed tubular filter element (4), and a valve cap (9) that is fitted onto the cylindrical protrusion (10) to open and close the foreign matter discharge port (9). It has a 5) and a spring (6) that urges the valve cap (5) in the valve opening direction.
The cyclone dust collector (3) is arranged inside the housing (2) with one end facing the outlet (8) side, and one end is closed.
The filter element (4) is arranged inside the one end side of the cyclone dust collector (3) and is connected to the outlet (8).
The outlet (3c) of the cyclone dust collector (3) is connected to the foreign matter discharge port (9).
The liquid to be filtered introduced into the housing (2) is introduced into the cyclone dust collector (3) through the swirling flow generator (3a).
The liquid introduced into the cyclone dust collector (3) passes through the filter element (4) and reaches the outlet (8).
Foreign matter in the liquid that has flowed into the cyclone dust collector (3) flows into and accumulates on the small diameter end (3b) side of the cyclone dust collector (3).
The valve cap (5) is attached to the cylindrical protrusion (10) by a bayonet connecting portion (15), and the bayonet connecting portion (15) is attached to the inner surface of the peripheral wall (5a) of the valve cap (5). It is composed of a locking protrusion (16) provided and a guide groove (17) formed on the outer periphery of the cylindrical protrusion (10).
The guide groove (17) includes a vertical groove (17a) into which the locking projection (16) is inserted in the axial direction, a first horizontal groove (17b) extending in the circumferential direction from the end of the vertical groove (17a), and a vertical groove (17b) thereof. A second lateral groove (17c) that is continuous with a step at the end of the first lateral groove (17b) is provided.
The valve cap (5) closes the foreign matter discharge port (9) at a position where the locking projection (16) enters the second lateral groove (17c) and is held in the second lateral groove (17c).
The foreign matter discharge port (9) opens at a position where the locking projection (16) enters the first lateral groove (17b) and is held in the first lateral groove (17b), and the cyclone dust collector (3). ) Is discharged to the outside through the discharge hole (5c) provided in the valve cap (5).
The movement of the locking projection (16) from the vertical groove (17a) to the first horizontal groove (17b) is performed by rotating the valve cap (5).
The locking projection (16) is configured to move from the first lateral groove (17b) to the second lateral groove (17c) by pushing the valve cap (5) in the valve closing direction and rotating the valve cap (5). Inline strainer. A tubular housing (2) having a liquid inlet (7) and an outlet (8) at one end and the other end, and a cylindrical protrusion (10) having a foreign matter discharge port (9) in the middle in the longitudinal direction. The dust collecting cylinder (3A) having a swirling flow generating portion (3a) on the inflow port (7) side, the tubular filter element (4), and the cylindrical protruding portion (10) are fitted onto the dust collecting cylinder (3A). It has a valve cap (5) that opens and closes the foreign matter discharge port (9), and a spring (6) that urges the valve cap (5) in the valve opening direction.
The dust collecting cylinder (3A) connected to the swirling flow generating unit (3a), the filter element (4), and the opening on the outlet (8) side of the filter element (4) is the housing (2). An outlet (3c) installed inside and provided on the outer periphery of the dust collecting cylinder (3A) is connected to the foreign matter discharging port (9).
The liquid to be filtered introduced into the housing (2) is introduced into the filter element (4) through the swirling flow generator (3a), and the liquid that has passed through the filter element (4) is the filter element (3a). Foreign matter remaining inside the filter element (4) from the passage (14) on the outer periphery of the 4) to the outlet (8) is taken into the dust collector (3A).
The valve cap (5) is attached to the cylindrical protrusion (10) by the bayonet connecting portion (15), and the bayonet connecting portion (15) is the same as the bayonet connecting portion (15) according to claim 1. Inline strainer that is a structure. The corner portion where the groove end surface (f3) on the guide groove entrance side of the first horizontal groove (17b) and the vertical groove (17a) intersect, and the groove end surface (f2) on the guide groove entrance side of the second horizontal groove (17c). A stopper (18) projecting toward the root side of the cylindrical projecting portion (10) is provided at each corner portion where the first lateral groove (17b) intersects with the locking projection (16). The movement from the groove (17a) to the first lateral groove (17b) and the movement of the locking projection (16) from the first lateral groove (17b) to the second lateral groove (17c) get over the stopper (18). The inline strainer according to claim 1 or 2, wherein the in-line strainer is made in position.

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