JP6755205B2 - Sleeve valve - Google Patents

Description

The present invention relates to a sleeve valve that is attached to the middle or end of a pipe to control the flow rate or pressure by passing through the perforated sleeve.

This type of sleeve valve has, for example, an inflow pipe connected to one end of a tubular valve box and an outflow pipe connected to the other end, and has perforations (plural valve holes) in the valve box in which the inflow pipe side is closed. It consists of a sleeve valve body and a cylinder (inner valve) that is movably fitted on the outer circumference of the sleeve valve body on the same axis, and by moving the cylinder on the shaft, the required number of perforations of the sleeve valve body. Some of them control the flow rate by closing the pipe (see Patent Document 1, Scope of Request for Registration of Practical New Idea, Fig. 2, etc.).
Further, in the valve box, a cylinder whose inflow pipe side is closed is provided on the same shaft, a sleeve valve body having a perforated peripheral wall is provided in the cylinder so as to be movable on the same shaft, and the sleeve valve body is placed on the shaft. There is also a sleeve valve that controls the flow rate by closing the required number of perforations of the sleeve valve body by moving it.

In each sleeve valve, the fluid (water or the like) may contain foreign matter such as sand, stone, wood chips, coal pieces, etc., and the foreign matter causes the above-mentioned porosity to be clogged. Since the clogging of the holes affects the flow rate characteristics such as pressure loss, there is a conventional one provided with a cleaning mechanism for eliminating the clogging of the valve holes.

Jikken Sho 58-13178

Since the conventional cleaning mechanism is provided on a moving member, for example, a moving cylinder and is located inside the valve box, cleaning water is guided to the outside of the valve box via a moving pipe, and the valve itself As the size increases, the configuration becomes complicated (see Patent Document 1, column 3, line 42 to column 4, line 3, FIG. 2 and the like).

In view of the above circumstances, it is an object of the present invention to configure a cleaning mechanism with a simple structure.

In order to achieve the above object, the present invention provides a groove leading to the outside of the valve box on the entire circumference of the sliding surface between the valve box and the sleeve valve body, and the valve hole of the sleeve valve body faces the groove to face the sleeve valve. A mechanism was adopted in which the fluid in the body was circulated to the outside through the valve hole, that is, backwashed and washed.
Specifically, an inflow pipe is connected to one end of the tubular valve box and an outflow pipe is connected to the other end, and a cylinder whose inflow pipe side is closed is provided on the same shaft in the valve box, and there are many peripheral walls in the cylinder. A sleeve valve body having a valve hole (perforated) is provided so as to be movable on the same axis on the downstream side, and corresponds to the valve seat of the sleeve valve body on the inner surface of the valve box through the gap from the end of the cylinder on the outflow pipe side. In an in-line type sleeve valve provided with a sliding surface with a sleeve valve body having a valve box valve seat, a groove extending over the entire circumference of the sliding surface of the valve box is formed on the downstream side of the valve box valve seat. , A configuration having a discharge hole for communicating the groove to the outside of the valve box was adopted.

In the sleeve valve having this configuration, the number of multiple valve holes (perforated) of the sleeve valve body facing the gap is adjusted (required number) by infesting the sleeve valve body in the cylinder (moving it on the axis). The valve hole faces the gap). Depending on the number of valve holes facing the gap, a required amount of fluid flows from the inflow pipe at one end of the valve box to the outflow pipe at the other end through the gap. That is, flow rate control or pressure control can be performed. The valve closes when both valve seats are brought into contact with each other.
In this action, if the valve hole is clogged with foreign matter and smooth flow cannot be obtained, the sleeve valve body is further moved to the outflow pipe side so that the valve hole faces the groove. Then, the fluid that has entered the sleeve valve body through the gap flows from the valve hole to the groove side and flows out to the outside of the valve box. Due to this outflow, each valve hole is backwashed and the clogging is cleared.
When the pore clogging is cleared, the sleeve valve body is moved to the inflow pipe side to shift to the normal valve action.

Various configurations can be considered as the means for moving the sleeve valve body on the shaft. For example, a valve shaft is inserted into the cylinder, a first link around the shaft is provided on the valve shaft, and the first link is provided. A second link connected to the sleeve valve is rotatably connected to the tip of the sleeve valve, and the sleeve valve is moved via the first and second links by rotation around the axis of the valve shaft. Can be adopted.
Further, if an on-off valve that leads to the outside is provided in the discharge hole, the outflow of the fluid that has entered the groove to the outside can be controlled by opening and closing the on-off valve.
Further, although the number of the discharge holes may be one in the valve box, a plurality of the discharge holes may be provided around the valve box. It will flow out.

In the present invention, since the cleaning mechanism including the groove or the like is directly provided in the valve box with the above-described configuration, the configuration can be simplified and the size of the valve itself can be suppressed.

A cut plan view of an embodiment of a sleeve valve according to the present invention. Cutting front view of the same embodiment Front view of cutting for explaining the action of the same embodiment Side view of cutting for explaining the action of the same embodiment Enlarged view of the main part of the same embodiment Front view of the enlarged cut portion of the main part of the same other embodiment

An embodiment of the sleeve valve according to the present invention is shown in FIGS. 1 to 5, and the in-line type sleeve valve 10 of this embodiment is attached to a horizontal or vertical piping portion of an intake pipe from a river. As shown in FIG. 1, an inflow pipe 1 is connected to one end of the cylindrical valve box 11 and an outflow pipe 2 is connected to the other end, and a cylinder 12 in which the inflow pipe 1 side is closed is set on the same axis in the valve box 11. A sleeve valve body 13 having a perforated (plural number of valve holes) 13c is provided in the cylinder 12 so as to be movable on the same axis.
The valve box 11 and the cylinder 12 are a cast product or an integral body obtained by welding the two, and the tip of the cylinder 12 (on the inflow pipe 1 side) is formed in a streamlined manner to reduce water resistance. A valve shaft 15 is inserted into the valve box 11 at right angles to the flow direction of water a, and the valve shaft 15 is rotated by a handle or a drive machine (not shown).

The sleeve valve body 13 has a cylindrical shape, and the front side is a guide portion 13a that fits into the cylinder 12 and slides, and the rear side is a perforated portion 13b in which a large number of valve holes 13c are spirally arranged on the outer peripheral portion thereof. There is. The guide portion 13a has a larger diameter than the perforated portion 13b, the boundary thereof becomes a step with a downward slope, and the step with a downward slope becomes a valve seat 14a of the sleeve valve body 13. As shown in FIG. 3, the valve seat 14a closes the sleeve valve 10 by coming into contact with the valve box valve seat 14b having the same inclined surface by moving the sleeve valve 13.

The valve hole 13c has a truncated cone shape in which the diameter is reduced toward the axial center of the sleeve valve body 13 (see FIG. 5), and the truncated cone shape makes the valve hole 13c more than a cylindrical hole (straight hole). High cavitation suppression effect. On the other hand, since it is tapered toward the distribution direction, foreign matter such as wood chips and dust flowing from the upstream side tends to be clogged. Normally, foreign matter (wood fragments, coal scraps, etc.) larger than the valve hole 13c is filtered by the porous 13c and does not enter the sleeve valve body 13, but foreign matter smaller (smaller diameter) than the outer surface diameter t1 of the valve hole 13c is in the valve hole. It gets into 13c and is easily clogged.

A first link 17a in the radial direction (around the axis) is fixed to the valve shaft 15, and a second link 17b is rotatably connected to the tip of the first link 17a to form a link mechanism 17. The tip of the second link 17b is rotatably connected to the boss 18 of the sleeve valve body 13. Therefore, when the valve shaft 15 rotates, the sleeve valve body 13 moves back and forth in the distribution direction (left and right in FIG. 1) via the link mechanism 17.
Along with the movement, each valve hole 13c of the sleeve valve body 13 is sequentially opened and closed by the axial movement of the sleeve valve body 13, and when the valve seats 14a and 14b are not in contact with each other (state of FIG. 2). ), The water a from the inflow pipe 1 flows into the sleeve valve body 13 through the valve hole 13c from the gap 16 between the inner peripheral surface of the valve box 11 and the outer peripheral surface of the cylinder 12, and flows to the outflow pipe 2.

A groove 20 is formed on the sliding surface of the valve box 11 on the downstream side (right side in FIG. 1) of the valve box 11 with the sleeve valve body 13, and a groove 20 is formed around the groove 20. Is provided. Therefore, as shown in FIG. 4, when the valve hole 13c faces the groove 20, the water a in the sleeve valve body 13 flows into the groove 20 through the valve hole 13c and flows out from the discharge hole 21 to the outside. To do. That is, the backwash clears the clogging of the foreign matter in the valve hole 13c.

As shown in FIG. 4, if the on-off valve 22 is provided in the discharge hole 21 and the on-off valve 22 is opened only when the valve hole 13c is backwashed, the valve hole 13c faces the groove 20 during the flow rate control. However, it is possible to prevent the fluid from flowing into the groove 20 and flowing out to the outside. That is, the backwash timing can be controlled. The position and number of the discharge holes 21 are arbitrary, and equal division around the groove 20 is preferable. However, since foreign matter tends to collect on the lower side of the groove 20, a large number can be provided on the lower side thereof.

The sleeve valve 10 of this embodiment has the above configuration, and as shown in FIGS. 1 and 2, the sleeve valve body is formed in the gap 16 between the cylinder 12 and the valve box 11 via the link mechanism 17 by rotating the valve shaft 15. When the valve hole 13c of the 13 is faced, the water a from the inflow pipe 1 flows into the sleeve valve body 13 through the valve hole 13c and flows to the outflow pipe 2. At this time, flow rate control or pressure control is performed by adjusting the axial position of the sleeve valve body 13 by rotating the valve shaft 15 and adjusting the number of valve holes 13c facing the gap 16.

In this action, if the porous 13c is clogged with foreign matter and smooth flow cannot be obtained, the sleeve valve body 13 is further moved to the downstream side as shown in FIGS. 3 and 4, and the porous 13c is formed into the groove 20. The fluid a that has entered the sleeve valve body 13 through the gap 16 flows from the valve hole 13c to the groove 20 side and flows out from the discharge hole 21 to the outside of the valve box. By this distribution / outflow, each valve hole 13c is backwashed and the clogging is cleared. This backwash is performed in a spiral manner from the valve hole 13c near the groove 20, and the backwash water is applied to the valve hole 13c on the rear side (left side in FIG. 3) facing the groove 20. It is supplied into the sleeve valve body 13 via the sleeve valve body 13. During this backwash, the on-off valve 22 is opened.

At this time, since the groove 20 is located downstream from the contact position (seal position) of the valve seats 14a and 14b, when the valve is closed (when the valve seats 14a and 14b are in contact (seal)), As shown in FIG. 3, since all the valve holes 13c finish facing the groove 20, all the backwashing of the porous 13c is performed to clear the clogging. When the valve hole 13c at the rear end (the rearmost left end in FIG. 3) faces the groove 20 shown in the figure, the inflow of water a from the gap 16 into the sleeve valve body 13 is eliminated, but the outflow pipe 2 Water a flows in due to the water pressure inside, and backlash is performed.
When the clogging of the porous 13c is cleared, as shown in FIGS. 1 and 2, the sleeve valve body 13 is moved to the upstream side to shift to the normal valve action.

In the above embodiment, the size of the groove 20 and the size of the discharge hole 21 and their positions are set in experiments so that the backwashing action is smoothly performed and the drainage and foreign matter are smoothly discharged to the outside. For example, as shown in FIG. 5, the width w1 and the depth d of the groove 20 are the hole diameter t1 and the sleeve valve body 13 on the outer peripheral surface of the valve hole 13c of the sleeve valve body 13. The thickness t2 can be set to be equal to or larger than the larger one (w1, d ≧ t1, t2). Normally, foreign matter (wood fragments, coal scraps, etc.) larger than the valve hole 13c is filtered by the porous 13c and does not enter the sleeve valve body 13 (valve hole 13c), but foreign matter smaller (smaller diameter) than the valve hole 13c is a valve. It gets into the hole 13c and is easily clogged. Therefore, if the settings are made as described above (w1, d ≧ t1, t2), the foreign matter extruded from the valve hole 13c during the backwashing is contained in the valve hole 13c, so that the diameter t1 and the thickness are t1. Since it is the same or smaller than t2, it smoothly enters the groove 20 having a diameter t1, a width w equal to or larger than the thickness t2, and a depth d (w, d ≧ t1, t2), and is clogged by rotating in the groove 20. There is no such thing.

Further, if the diameter w2 of the discharge hole 21 is set to be equal to or larger than the larger of the diameter t1 of the valve hole 13c and the thickness t2 of the sleeve valve body 13 on the outer peripheral surface of the sleeve valve body 13 (w2 ≧ t1). , T2), the foreign matter extruded from the valve hole 13c is the same as or smaller than the diameter t1 and the thickness t2 because it is contained in the valve hole 13c, so that the foreign matter flowing into the groove 20 is any of the diameters t1 and t2. It smoothly flows into the discharge hole 21 having a diameter w2 equal to or larger than the larger one, and is discharged to the outside.
Further, the valve seats 14a and 14b may be formed of a cast surface or the like on the inner surface of the valve box 11 as described above, but as shown in FIG. 6, a seat member 19 such as rubber or metal (SUS304 or the like) 19 It is preferable to configure with. Similarly, the valve seat 14a of the sleeve valve body 13 can also be configured by the seat member.

Thus, it should be considered that the embodiments disclosed this time are exemplary in all respects and not restrictive. The scope of the present invention is indicated by the scope of claims and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

1 Inflow pipe 2 Outflow pipe 10 Sleeve valve 11 Valve box 12 Cylinder 13 Sleeve valve body 13a Sleeve valve body guide part 13b Same perforated part 13c Valve hole (perforated)
14a Sleeve valve body side valve seat 14b Valve box side valve seat 15 Valve shaft 16 Gap 17 Link 17a First link 17b Second link 18 Boss 19 Seat member 20 Groove 21 Outlet hole 22 Open / close valve a Water (fluid)

Claims (5)

A cylinder (12) in which an inflow pipe (1) is connected to one end of a tubular valve box (11) and an outflow pipe (2) is connected to the other end, and the inflow pipe (1) side is closed in the valve box (11). ) Is provided on the same shaft, and a sleeve valve body (13) having a peripheral wall having many valve holes (13c) is provided in the cylinder (12) so as to be movable on the same shaft on the downstream side, and the outflow of the cylinder (12). A sleeve having a valve box valve seat (14b) corresponding to the valve seat (14a) of the sleeve valve body (13) on the inner surface of the valve box (11) from the end on the pipe (2) side via the gap (16). An in-line sleeve valve (10) provided with a sliding surface with the valve body (13).
A groove (20) extending over the entire circumference of the sliding surface of the valve box (11) is formed on the downstream side of the valve box valve seat (14b), and the groove (20) is provided outside the valve box (1). A sleeve valve having a communicating discharge hole (21). The sleeve valve according to claim 1, wherein the discharge hole (21) is provided with an on-off valve (22) leading to the outside. The sleeve valve according to claim 1 or 2, wherein a plurality of the discharge holes (21) are provided around the valve box (11). The width (w1) and depth (d) of the groove (20) are the hole diameter (t1) and the thickness of the sleeve valve body (13) on the outer peripheral surface of the valve hole (13c) of the sleeve valve body (13). The sleeve valve according to any one of claims 1 to 3, which is equal to or larger than any of (t2) (w1, d ≧ t1, t2). The size (w2) of the discharge hole (21) over the entire length thereof is the hole diameter (t1) on the outer peripheral surface of the valve hole (13c) of the sleeve valve body (13) and the sleeve valve body (13). The sleeve valve according to any one of claims 1 to 4, which is equal to or larger than any one of the thicknesses (t2) of (W2 ≧ t1, t2).

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