JP7156713B2 - inline strainer - Google Patents

Description

The present invention provides an in-line strainer incorporated in a plant cultivation piping line to filter out foreign matter in a liquid such as agricultural chemicals and water supplied through the piping line, more specifically, a valve cap for opening and closing a foreign matter discharge port. The present invention relates to an in-line strainer capable of quickly opening and closing a foreign object discharge port by means of a valve cap.

As a prior art of the in-line strainer mentioned above, there is one shown in Patent Document 1 below. The in-line strainer of Patent Document 1 was developed and proposed by the present applicant,
It has a cylindrical housing provided with an inflow port for the liquid to be filtered at one end, an outflow port at the other end, and a foreign matter discharge port on the outer circumference in the middle of the longitudinal direction.

A swirling flow generating component installed inside the housing, a cylindrical filter element having an inflow side open end connected to the swirling flow generating component, and a dust collection cylinder connected to an outflow side open end of the filter element. and a valve cap for closing the foreign object discharge port, and an outlet provided on the outer circumference of the dust collecting cylinder is connected to the foreign substance discharge port.

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

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

Further, foreign matter remaining inside the filter element is washed away by the swirling flow inside the element and taken into the dust collection tube. When the amount of dust collected in the dust collection tube increases, the valve cap is operated to open the foreign matter discharge port, and the foreign matter is removed to the outside.

Japanese Unexamined Patent Application Publication No. 2014-178000

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

The foreign object discharge port is configured by a pipe joint having a male thread on its outer periphery, and the valve cap is screwed to the pipe joint.

The foreign object outlet 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, the foreign matter caught in the dust collection cylinder is discharged outside through the discharge hole provided in the valve cap. Ejected.

As described above, the conventional in-line strainer employs a method in which the valve cap screwed to the housing is partially loosened to discharge foreign matter in the dust collecting cylinder to the outside. Several rotations of the cap are required, as well as rotation of the valve cap to reseal the debris outlet.

In a spray device such as a boom sprayer equipped with many spray nozzles, an in-line strainer may be attached to each spray nozzle. become.

An object of the present invention is to improve the above-mentioned in-line strainer and to make it possible to easily open and close a foreign matter discharge port by operating a valve cap.

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

1) A cylindrical housing having a liquid inflow port and a liquid outflow port at one end and a liquid outflow port, and a cylindrical projection having a foreign matter discharge port in the middle of the longitudinal direction, and a swirling flow generating portion at one end, A cyclone dust collection tube having a tapered cone-shaped tube whose diameter is gradually reduced on the other end side and an outlet provided on the outer periphery near the closed small diameter end, a bottomed tube-shaped filter element, and the cylindrical projection. a valve cap that is externally fitted to the part to open and close the foreign object discharge port; and a spring that biases the valve cap in the valve opening direction,
the cyclone dust collecting tube is disposed inside the housing with one end facing the outlet side and closed at one end;
The filter element is arranged inside one end side of the cyclone dust collecting tube and connected to the outlet,
the outlet of the cyclone dust collecting tube is connected to the foreign object discharge port;
the liquid to be filtered that has been introduced into the housing is introduced into the cyclone dust collection tube through the swirling flow generating section;
the liquid introduced into the cyclone dust collection cylinder permeates the filter element and reaches the outlet,
Foreign matter in the liquid that has flowed into the cyclone dust collection tube flows into the small diameter end side of the cyclone dust collection tube and accumulates thereon,
The valve cap is attached to the cylindrical projecting portion by a bayonet connecting portion, and the bayonet connecting portion includes a locking projection provided on the inner surface of the peripheral wall of the valve cap and a guide formed on the outer circumference of the cylindrical projecting portion. grooves and
The guide groove includes a longitudinal groove into which the locking projection is inserted in the axial direction, a first lateral groove extending in the circumferential direction from the end of the longitudinal groove, and a second lateral groove continuous with the end of the first lateral groove with a step. ,
the valve cap closes the foreign object discharge port at a position where the locking projection enters the second lateral groove and is held in the second lateral groove;
At the position where the engaging projection enters the first lateral groove and is held in the first lateral groove, the foreign object discharge port is opened so that foreign substances in the dust collecting cylinder pass through the discharge hole provided in the valve cap. and discharged to the outside,
moving the locking projection from the longitudinal groove to the first lateral groove by rotating the valve cap;
An in-line strainer configured such that the locking protrusion is moved from the first lateral groove to the second lateral groove by pushing the valve cap in a valve closing direction and rotating it.

2) A cylindrical housing having a liquid inlet and an outlet at one end and the other end, a cylindrical projection having a foreign matter discharge port in the middle of the longitudinal direction, and a collector having a swirling flow generating portion at the inlet side. a dust cylinder, a cylindrical filter element, a valve cap fitted on the cylindrical projection to open and close the foreign object discharge port, and a spring biasing the valve cap in the valve opening direction,
The swirl flow generator, the filter element, and the dust collection tube connected to the outlet side opening of the filter element are installed inside the housing. 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 outflow port through the passage on the outer periphery of the filter element. Foreign matter remaining inside is taken into the dust collection cylinder,
An in-line strainer in which the valve cap is attached to the cylindrical protrusion by a bayonet connection portion, which is the same as the bayonet connection portion of the in-line strainer of 1) above.

The inline strainers of 1) and 2) comprise a corner portion where the groove end surface of the first lateral groove on the guide groove entrance side and the vertical groove intersect, a groove end surface of the second lateral groove on the guide groove entrance side and the first lateral groove. A corner portion where the lateral grooves intersect is provided with a stopper protruding toward the root side of the cylindrical protrusion, and the movement of the locking projection from the longitudinal groove to the first lateral groove and the movement of the locking projection from the first lateral groove are provided. It is preferable that the movement from the first lateral groove to the second lateral groove is performed at a position beyond the stopper.

It is preferable that two sets of the engaging projection and the guide groove are provided in the valve cap and the cylindrical protrusion in a centrally symmetrical arrangement.

In the in-line strainer of the present invention, the valve cap is bayonet-fitted to the cylindrical projecting portion of the housing having the foreign object discharge port, and the valve cap is rotated to move the locking projection 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 end of the cylindrical protrusion (in the valve opening direction), thereby opening the foreign matter discharge port closed by the valve cap.

Further, when the valve cap is pushed in a direction (valve closing direction) against the force of the spring and rotated 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 is small (for example, less than 45°), and compared to conventional products in which the valve cap is rotated several times, the opening and closing operation of the foreign matter discharge port is simple.

It should be noted that the corner portion of the groove end face of the first lateral groove on the entrance side of the guide groove and the corner portion of the groove end face of the second lateral groove on the entrance side of the guide groove are provided with the stoppers. The position is reliably held in the second lateral groove and the first lateral groove, and unintended changes in the state of closing and opening of the foreign matter discharge port due to the valve cap do not occur.

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 slight amount. Since the foreign matter discharge port can be opened and closed with the valve cap, it is easier to open and close the foreign matter discharge port than the conventional product with the valve cap screwed together. Particularly in a spray system, it is possible to significantly reduce the labor required to remove the foreign matter that has been filtered off.

It is a sectional view showing one form of the in-line strainer of this invention. 2 is an exploded perspective view of the elements of the in-line strainer of FIG. 1 without the end cap; FIG. FIG. 2 is a cross-sectional view of a portion taken along line AA of FIG. 1; FIG. 2 is a perspective view showing components of the bayonet connection of FIG. 1; It is a figure showing the side surface of the guide groove of the bayonet connection part of FIG. 1, and the cross section of the locking protrusion installation part of a valve cap. FIG. 11 is a perspective cutaway view showing the attached state of the valve cap with the foreign object outlet opened. FIG. 4 is a cross-sectional view showing another form of the in-line strainer of the present invention;

An embodiment of an in-line strainer according to 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 tube 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 substance discharge port 9 in the middle of the longitudinal direction. Further, a cylindrical projecting portion 10 projecting in a direction perpendicular to the longitudinal direction is provided on the outer periphery near the inlet 7 , and a hole in the cylindrical projecting portion 10 serves as the foreign matter discharge port 9 .

Reference numeral 11 denotes an end cap detachably attached to the outflow port side of the housing 2. The end cap 11 is provided with a pipe joint PJ for connection with a piping line and an outflow port 8. As shown in FIG. An elastic packing 12 is interposed between the end cap 11 and the cylinder of the housing 2 . The packing 12 also includes what seals the connection of the pipe joint PJ to the pipeline.

As shown in FIG. 2, the cyclone dust collection tube 3 has a swirling flow generating portion 3a on one end side of a right cylindrical shape, and the other end side is a tapered cone-shaped tube whose diameter gradually decreases and is closed. An outlet 3c is provided on the outer periphery near the small diameter end 3b.

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

As shown in FIG. 2, the positioning portion 13 has projecting pieces 13a at centrally symmetrical positions on the outer periphery of the cyclone dust collecting tube 3, and vertically elongated guide grooves 13b at centrally symmetrical positions on the inner surface of the housing 2, respectively. is fitted into the guide groove 13b as shown in FIG. 3, but it is not limited to this.

An opening at one end of the cyclone dust collecting tube 3 is liquid-tightly closed by a packing 12, as shown in FIG. A through passageway 14 is created.

The filter element 4 is arranged inside one end side (right cylindrical portion) of the cyclone dust collecting tube 3 with the open end side provided with the flange 4a connected to the outflow port 8 .

The illustrated in-line strainer 1 is used in the posture shown in FIG. 1, that is, in an upright state with the inlet port 7 facing downward and the outlet port 8 facing upward.

The swirling flow generating portion 3a is created by opening an opening O in the right cylindrical portion of the cyclone dust collecting tube 3, through which the liquid in the passage 14 is introduced inward in the tangential direction. turns along the inner surface of the right cylindrical portion, forms a spiral flow, and flows toward the small diameter end 3b side of the cyclone dust collecting tube 3.

Then, it reverses on the way, passes through the filter element 4, and reaches the outflow port 8. - 特許庁Also, the foreign matter, which has a higher specific gravity than the liquid, flows toward the small diameter end 3b side of the cyclone dust collecting tube 3 while swirling due to the centrifugal force, and accumulates inside the small diameter end 3b side.

The valve cap 5 is a bottomed cylindrical cap having 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 through which foreign matter passes. 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 inlet 7 connected to the upstream side of the piping line (not shown) reaches the upper part of the passage 14 and reaches the opening O of the swirling flow generating part 3a. The liquid is introduced into the cyclone dust collecting cylinder 3 from the outlet and becomes a swirl flow, and the liquid from which most of the foreign matter has been separated is filtered by the filter element 4 and is downstream of the piping line from the outlet 8 (the side close 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 differs from the conventional product in the following parts.

The difference from the conventional product is that the valve cap 5 is attached to the cylindrical projecting portion 10 by providing the bayonet connecting portion 15 shown in detail in FIGS. be. A spring 6 urges the valve cap 5 in a direction to escape from the cylindrical protrusion 10 .

The bayonet connecting portion 15 consists of the elements shown in FIG.

The guide groove 17 is composed of a vertical groove 17a (see FIGS. 4 and 5) having one end open to the end face (protruding end) of the cylindrical projecting portion 10 for inserting the locking projection 16 in the axial direction, and a vertical groove 17a extending from the end of the vertical groove 17a. It is a groove provided with a first lateral groove 17b extending in the circumferential direction and a second lateral groove 17c continuing to the end of the first lateral groove 17b with a step.

The first lateral groove 17b and the second lateral groove 17c are grooves for receiving and locking the locking projection 16. As shown in FIG. The valve cap 5 covering the tip side of the cylindrical projecting portion 10 is pushed toward the root side (left side in FIG. 5) of the cylindrical projecting portion 10, and the locking projection 16 reaches the end of the longitudinal groove 17a. to rotate the valve cap 5 with .

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

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

When 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 projection 10 as shown in FIG. For this reason, the foreign object discharge port 9 is cut off from the outside by the seal ring 5d, and is closed.

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

The illustrated bayonet connection portion 15 includes a corner portion where the groove end face f3 of the first lateral groove 17b and the vertical groove 17a intersect, and a corner portion where the groove end face 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.

When the amount of protrusion of the cylindrical protrusion 10 toward the root side of the stopper 18 moves the locking protrusion 16 from the longitudinal groove 17a to the first lateral groove 17b and from the first lateral groove 17b to the second lateral groove 17c, Alternatively, the size is set so that the engaging projection 16 can be overcome when moving in the opposite direction to the above.

With this stopper 18, the stopper 18 prevents accidental 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. Unintended changes in the closed state and open state of the discharge port 9 are prevented.

In the illustrated in-line strainer 1 configured as described above, when trapped foreign matter accumulates inside the cyclone dust collecting tube 3 to some extent, the valve cap 5 blocking the foreign matter discharge port 9 is slightly pushed in, and the locking projection 16 is released. moves from the second lateral groove 17c to the first lateral groove 17b.

Then, the valve cap 5 is released when the locking projection 16 comes into contact with the groove side surface f4 (see FIG. 5) of the first lateral groove 17b. As a result, the valve cap 5 is pushed toward the tip of the cylindrical projection 10 by the spring 6, and the locking projection 16 is held in contact with the surface of the first lateral groove 17b on the entrance side of the guide groove.

FIG. 7 shows another embodiment of the in-line strainer of this invention. This in-line strainer 1A comprises a cylindrical housing 2 having an inlet 7, an outlet 8 and a foreign matter discharge port 9, a dust collecting tube 3A having a swirling flow generator 3a on the inlet side, and a cylindrical filter element 4. , valve cap 5 and spring 6 are combined.

The housing 2 has a cylindrical projecting portion 10 formed with a foreign matter discharge port 9 formed on the outer circumference near the outflow port 8, and the rest of the construction is not much different from the housing 2 of FIG.

The swirl flow generator 3 a is composed of a single component, and the single component is incorporated into the inflow side end inside the housing 2 . The illustrated swirl flow generator 3a has a plurality of twisted passages 3d that are twisted in a predetermined direction. A swirling flow is generated that washes away foreign matter attached to the inner surface of the element.

The filter element 4 of FIG. 7 has an open end on the inflow port 7 side connected to a component forming the swirling flow generating portion 3a, and an open end on the outflow port 8 side to which the dust collecting cylinder 3A is detachably connected.

The dust collecting tube 3A is a tapered cone-shaped tube whose diameter gradually decreases from the inlet 7 side toward the outlet 8 side. An outlet 3c is provided on the outer periphery of the dust collecting tube 3A on the side of the closed small diameter end 3b, and the dust collecting tube 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. position and hold.

The inline strainer 1A of FIG. 7 is also used with the inflow port 7 facing downward and the outflow port 8 facing upward, similar to the inline strainer 1 of FIG.

In this inline 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 collection cylinder 3A and the peripheral wall of the housing 2, and the liquid filtered by the filter element 4 flows through the passage. 14 and out the outlet 8 to the downstream side of the pipeline.

The valve cap 5 and the structure for attaching the valve cap 5 to the cylindrical protrusion 10 of the housing 2 are the same as those of the in-line strainer 1 shown in FIG. Therefore, regarding the mounting structure, the same reference numerals are given to the same elements as in FIG.

As described above, according to the in-line strainer of the present invention, the foreign matter discharge port can be opened and closed simply by slightly rotating the valve cap. It is possible to significantly reduce the labor required for

1, 1A Inline strainer 2 Housing 3 Cyclone dust collection tube 3A Dust collection tube 3a Swirling flow generator O Opening 3b Small diameter end 3c Outlet 3d Torsion passage 4 Filter element 4a Flange 5 Valve cap 5a Peripheral wall 5b End wall 5c Discharge hole 5d Seal ring 6 Spring 7 Inlet 8 Outlet 9 Foreign object outlet 10 Cylindrical projecting portion 11 End cap PJ Pipe joint 12 Packing 13 Positioning portion 13a Protruding piece 13b Guide groove 14 Passage 15 Bayonet connecting portion 16 Locking protrusion 17 Guide groove 17a Vertical Groove 17b First lateral groove 17c Second lateral groove 18 Stoppers f1, f4 Groove side faces f2, f3 Groove end faces

Claims (3)

A cylindrical 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 outlet (9) in the middle of the longitudinal direction. One end has a swirling flow generating part (3a), and the other end is a tapered cone-shaped cylinder whose diameter is gradually reduced, and an outlet (3c) is provided on the outer periphery near the closed small diameter end (3b). a cyclone dust collecting tube (3), a bottomed cylindrical filter element (4), and a valve cap ( 5) and a spring (6) that biases the valve cap (5) in the valve opening direction,
The cyclone dust collecting tube (3) is arranged inside the housing (2) with one end facing the outlet (8) side and closed at one end,
The filter element (4) is arranged inside one end side of the cyclone dust collecting tube (3) and connected to the outlet (8),
the exit (3c) of the cyclone dust collecting tube (3) is connected to the foreign object discharge port (9);
The liquid to be filtered that has been introduced into the housing (2) is introduced into the cyclone dust collection cylinder (3) through the swirling flow generating section (3a),
The liquid introduced into the cyclone dust collection cylinder (3) permeates the filter element (4) and reaches the outlet (8),
Foreign matter in the liquid that has flowed into the cyclone dust collection tube (3) flows into the small diameter end (3b) of the cyclone dust collection tube (3) and accumulates thereon,
The attachment of the valve cap (5) to the cylindrical projection (10) is made by a bayonet connection (15), which is attached to the inner surface of the peripheral wall (5a) of the valve cap (5). It consists of a locking projection (16) provided and a guide groove (17) formed on the outer circumference of the cylindrical projection (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 second lateral groove (17c) that is continuous with the terminal end of the first lateral groove (17b) with a step;
the valve cap (5) closes the foreign object 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);
At the position where the locking projection (16) enters the first lateral groove (17b) and is held in the first lateral groove (17b), the foreign object discharge port (9) opens and the cyclone dust collecting cylinder (3) is opened. ) is discharged to the outside through a discharge hole (5c) provided in the valve cap (5),
the locking projection (16) is moved from the longitudinal groove (17a) to the first lateral groove (17b) by rotating the valve cap (5);
The locking projection (16) is moved 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 it. in-line strainer. A cylindrical 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 outlet (9) in the middle of the longitudinal direction. , a dust collection tube (3A) having a swirl flow generating portion (3a) on the side of the inlet (7), a cylindrical filter element (4), and the cylindrical projecting portion (10) fitted to the outside of the It has a valve cap (5) for opening and closing a foreign object discharge port (9) and a spring (6) for biasing the valve cap (5) in the valve opening direction,
The swirling flow generating portion (3a), the filter element (4), and the dust collecting tube (3A) connected to the outlet (8) side opening of the filter element (4) are included in the housing (2). An outlet (3c) installed inside and provided on the outer periphery of the dust collection cylinder (3A) is connected to the foreign matter discharge port (9),
The liquid to be filtered introduced into the housing (2) passes through the swirling flow generating section (3a) and is introduced into the filter element (4), and the liquid that has passed through the filter element (4) passes through the filter element ( Foreign matter remaining inside the filter element (4) from the passage (14) on the outer periphery of 4) to the outflow port (8) is taken into the dust collection tube (3A),
The attachment of the valve cap (5) to the cylindrical projection (10) is made by a bayonet connection (15), which bayonet connection (15) is identical to the bayonet connection (15) according to claim 1. In-line strainer which is a structure. A groove end surface (f3) of the first lateral groove (17b) on the guide groove entrance side and a corner portion where the longitudinal groove (17a) intersects, and a groove end surface (f2) of the second lateral groove (17c) on the guide groove entrance side. and the first lateral groove (17b) intersect, each provided with a stopper (18) protruding toward the root side of the cylindrical projection (10), the locking projection (16) of the vertical Movement from the groove (17a) to the first lateral groove (17b) and movement of the locking projection (16) from the first lateral groove (17b) to the second lateral groove (17c) overcome the stopper (18). 3. An in-line strainer according to claim 1 or 2, adapted to be made in position.

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