JP2018138795A - Sleeve valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To constitute a cleaning mechanism by employing simple structure.SOLUTION: An in-line type sleeve valve 10 is provided in which: inflow piping 1 is connected to one end of a cylindrical valve cage 11 and outflow piping 2 is connected to the other end; a cylinder 12 with the closed inflow piping side is provided in and coaxially with the valve cage 11; a sleeve valve element 13 with a porous peripheral wall 13c is movably provided in and coaxially with the cylinder; and the sliding surface between the valve cage and the sleeve valve element provides valve seats 14a and 14b. Grooves 20 are formed in the sliding surface over the entire circumference, and a discharge hole 21 is provided for communicating the grooves with the outside of the valve cage. If foreign matter is clogged in the porous body and smooth communication cannot be obtained, the sleeve valve element 13 is moved, so that porous portion 13c of the valve element 13 faces the grooves, consequently water a which has entered the sleeve valve element via a gap 16 flows to the groove side from the porous portion 13c and flows out to the outside of the valve cage. By this outflow, each hole is back-washed and the clogging is eliminated. The sleeve valve element is moved by the rotation of a valve stem 15 via a first link 17a and a second link 17b.SELECTED DRAWING: Figure 1

Description

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

In this type of sleeve valve, for example, an inflow pipe is connected to one end of a cylindrical valve box, and an outflow pipe is connected to the other end, and the inflow pipe side is closed in the valve box (a plurality of valve holes). A sleeve valve body and a cylinder (inner valve) movably fitted on the same axis on the outer circumference of the sleeve valve body. By moving the cylinder on the shaft, the required number of porous sleeve valve bodies The flow rate control and the like are performed by closing the valve (see Patent Document 1, Claim for Utility Model Registration, FIG. 2, etc.).
Further, in the valve box, a cylinder closed on the inflow piping side is provided on the same shaft, and a sleeve valve body having a porous peripheral wall is provided in the cylinder so as to be movable on the same shaft, and the sleeve valve body is provided on the shaft. There is also a sleeve valve that performs flow rate control and the like by closing the required number of holes in the sleeve valve body by moving it.

  In each sleeve valve, the fluid (water, etc.) may contain foreign matters such as sand, stones, wood pieces, coal pieces, etc., and the foreign matters cause clogging of the pores. Since clogging of the holes affects flow characteristics such as pressure loss, there has been conventionally provided a cleaning mechanism that eliminates clogging of the valve holes.

Japanese Utility Model Publication No. 58-13178

  The conventional cleaning mechanism is provided in a moving member, for example, a moving cylinder, and is located in the valve box, so that cleaning water is guided to the outside of the valve box through a moving pipe. As the size increases, the configuration becomes complicated (see Patent Document 1, third column, line 42 to fourth column, third line, FIG. 2 and the like).

  This invention makes it a subject to comprise a washing | cleaning mechanism with a simple structure in view of the above situation.

In order to achieve the above-mentioned object, the present invention provides a sleeve valve by providing a groove communicating with 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. A mechanism for circulating the fluid inside the body from the valve hole to the outside, that is, backwashing was adopted.
Specifically, an inflow pipe is connected to one end of the cylindrical valve box, and an outflow pipe is connected to the other end. A cylinder closed on the inflow pipe side is provided on the same shaft in the valve box, and there are many peripheral walls in the cylinder. A sleeve valve body with a valve hole (perforated) is provided 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 a gap from the end on the outflow piping side of the cylinder In the in-line type sleeve valve provided with a sliding surface with a sleeve valve body having a valve box valve seat, a groove is formed downstream of the valve box valve seat on the sliding surface of the valve box. Thus, a configuration having a discharge hole that communicates the groove with the outside of the valve box is adopted.

In the sleeve valve of this configuration, the number of the valve holes (perforated) of the sleeve valve body facing the gap is adjusted by moving the sleeve valve body into and out of the cylinder (moving on the shaft) (required number). The valve hole faces the gap). Depending on the number of valve holes facing the gap, a required amount of fluid flows from the inlet pipe at one end of the valve box to the outlet pipe at the other end through the gap. That is, flow control or pressure control can be performed. When both valve seats are brought into contact with each other, the valve is closed.
In this operation, if the valve hole is clogged with foreign matter and smooth circulation cannot be obtained, the sleeve valve body is further moved to the outflow piping 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 of the valve box. By this outflow, each valve hole is backwashed to eliminate clogging.
If the clogging of the pores is eliminated, the sleeve valve body is moved to the inflow piping side to shift to a normal valve action.

As the moving means on the shaft of the sleeve valve body, various configurations are conceivable. 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 opening / closing valve communicating with the outside is provided in the discharge hole, the outflow of the fluid entering the groove to the outside can be controlled by opening / closing the opening / closing valve.
Further, although there may be one discharge hole in the valve box, a plurality of the discharge holes can be provided around the valve box. At that time, if the discharge holes are provided at equal intervals, the fluid that has passed through the pores is uniformly distributed from the groove to the outside of the valve box. It begins to leak.

  Since the present invention is configured as described above and a cleaning mechanism including a groove or the like is directly provided in the valve box, the configuration is simplified and an increase in size of the valve itself can be suppressed.

Cutting top view of one embodiment of a sleeve valve according to the present invention Cut front view of the same embodiment Cutting front view for explaining the operation of the embodiment Cut side view for explaining the operation of the embodiment Main part enlarged view of the same embodiment The principal part expansion cutting | disconnection partial front view of other embodiment

1 to 5 show an embodiment of a sleeve valve according to the present invention. An inline sleeve valve 10 of this embodiment is attached to a horizontal or vertical pipe portion of a water intake pipe from a river, etc. As shown in FIG. 1, an inflow pipe 1 is connected to one end of a cylindrical valve box 11, and an outflow pipe 2 is connected to the other end, and a cylinder 12 closed on the inflow pipe 1 side is connected to the same axis in the valve box 11. In the cylinder 12, a sleeve valve body 13 whose peripheral wall part is porous (a plurality of valve holes) 13c is provided so as to be movable on the same axis.
The valve box 11 and the cylinder 12 are an integral part such as a cast product or a welded part, and the tip of the cylinder 12 (inflow pipe 1 side) is formed in a streamline shape to reduce water resistance. A valve shaft 15 is inserted into the valve box 11 so as to be orthogonal to the flow direction of the water a, and the valve shaft 15 is rotated by a handle or a driving machine (not shown).

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

  The valve hole 13c has a truncated cone shape that decreases in diameter toward the axis of the sleeve valve body 13 (see FIG. 5), and is shaped like a truncated cone as compared with a cylindrical hole (straight hole). High cavitation suppression effect. On the other hand, since the taper is tapered toward the flow direction, foreign matters such as wood chips and dust flowing from the upstream side tend to be clogged. Normally, foreign matters (wood pieces, coal scrap, etc.) larger than the valve hole 13c are filtered by the perforations 13c and do not enter the sleeve valve body 13, but foreign matters having a smaller (smaller diameter) than the outer diameter t1 of the valve hole 13c are valve holes. 13c easily enters and clogs.

A first link 17 a in the radial direction (around the axis) is fixed to the valve shaft 15, and a second link 17 b is rotatably connected to the tip of the first link 17 a to constitute a link mechanism 17. The tip of the second link 17b is rotatably connected to the boss 18 of the sleeve valve body 13. For this reason, when the valve shaft 15 rotates, the sleeve valve body 13 moves through the link mechanism 17 forward and backward (left and right in FIG. 1).
Along with the movement, the valve holes 13c of the sleeve valve body 13 are opened and closed sequentially by the axial movement of the sleeve valve body 13, and the valve seats 14a and 14b are not in contact with each other (the state of FIG. 2). ), 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 into the outflow pipe 2.

  A groove 20 of the entire circumference is formed on the sliding surface with the sleeve valve body 13 on the downstream side (right side in FIG. 1) of the valve box valve seat 14 b of the valve box 11, and the discharge hole 21 is formed around the groove 20. Is provided. For this reason, 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 clogging of foreign matter in the valve hole 13c is released by backwashing.

  As shown in FIG. 4, if the opening / closing valve 22 is provided in the discharge hole 21 and the opening / closing valve 22 is opened only during backwashing of the valve hole 13c, the valve hole 13c faces the groove 20 during flow control. However, the fluid can be prevented from flowing into the groove 20 and flowing out. That is, the backwash time can be controlled. The position and number of the discharge holes 21 are arbitrary, and it is preferable to divide the circumference of the groove 20 equally. However, since foreign substances are likely to accumulate below the groove 20, a large number can be provided below the groove.

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

  In this operation, if the porous 13c is clogged with foreign matter and smooth circulation cannot be obtained, the sleeve valve body 13 is moved further downstream as shown in FIGS. Then, the fluid a that has entered the sleeve valve body 13 through the gap 16 flows from the valve hole 13c toward the groove 20 and flows out of the valve box through the discharge hole 21. By this circulation / outflow, each valve hole 13c is backwashed to eliminate clogging. This backwashing is performed in a spiral fashion from the valve hole 13c close to the groove 20, and the backwash water passes through the valve hole 13c on the rear side (left side in FIG. 3) facing the groove 20. Via the sleeve valve body 13. The opening / closing valve 22 is opened during this backwashing.

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 contact (sealed)), As shown in FIG. 3, since all the valve holes 13c have finished facing the grooves 20, all the backwashing of the porous holes 13c is performed and the clogging is released. When the valve hole 13c at the tail (leftmost tail in FIG. 3) faces the groove 20 shown in FIG. 3, the water a from the gap 16 does not flow into the sleeve valve body 13, but the outflow pipe 2 The water a flows in by the internal water pressure and backwashing is performed.
If the clogging of the porous 13c is eliminated, as shown in FIGS. 1 and 2, the sleeve valve body 13 is moved to the upstream side to shift to a normal valve action.

  In the above embodiment, the size of the groove 20, the size of the discharge hole 21 and their positions are determined so that the backwashing action is performed smoothly and the drainage or foreign matter is smoothly discharged to the outside. For example, as shown in FIG. 5, the width w1 and the depth d of the groove 20 are determined by 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 thickness t2 can be set equal to or larger than the larger one (w1, d ≧ t1, t2). Normally, foreign matters larger than the valve hole 13c (wood pieces, coal scrap, etc.) are filtered by the perforations 13c and do not enter the sleeve valve body 13 (valve hole 13c), but foreign matters smaller than the valve hole 13c (small diameter) It easily enters the hole 13c and becomes clogged. For this reason, if it is set as described above (w1, d ≧ t1, t2), the foreign matter pushed out from the valve hole 13c at the time of backwashing has entered the valve hole 13c. Since it is equal to or smaller than t2, it smoothly enters the groove 20 having a width w and depth d (w, d ≧ t1, t2) equal to or larger than the diameter t1 and thickness t2, and is clogged by rotating in the groove 20 or the like. There is nothing.

Further, if the diameter w2 of the discharge hole 21 is set equal to or larger than the larger one 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) Since the foreign matter pushed out from the valve hole 13c has entered the valve hole 13c, the foreign matter that has flowed into the groove 20 is equal to or smaller than the diameter t1 and the thickness 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 constituted by the cast surface of the inner surface of the valve box 11 as described above, but as shown in FIG. 6, a sheet member 19 such as rubber or metal (SUS304 or the like). It is preferable to comprise. Similarly, the valve seat 14a of the sleeve valve body 13 can also be configured with a seat member.

  Thus, it should be thought that embodiment disclosed this time is an illustration and restrictive at no points. The scope of the present invention is defined by the terms of the claims, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

DESCRIPTION OF SYMBOLS 1 Inflow piping 2 Outflow piping 10 Sleeve valve 11 Valve box 12 Cylinder 13 Sleeve valve body 13a Guide part 13b of sleeve valve body Same porous part 13c Valve hole (porous)
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 Sheet member 20 Groove 21 Discharge hole 22 Open / close valve a Water (fluid)

Claims (5)

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 the cylinder (12) closed in the valve box (11) on the inflow pipe (1) side. ) Is provided on the same shaft, and a sleeve valve body (13) having a valve hole (13c) with a large number of peripheral walls in the cylinder (12) is provided movably on the same shaft on the downstream side. 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) through the gap (16) from the end on the pipe (2) side An inline sleeve valve (10) provided with a sliding surface with the valve body (13),
A groove (20) is formed on the sliding surface of the valve box (11) on the downstream side of the valve box valve seat (14b), and the groove (20) is formed outside the valve box (1). A sleeve valve having a discharge hole (21) communicating therewith.   The sleeve valve according to claim 1, wherein an opening / closing valve (22) communicating with the outside is provided in the discharge hole (21).   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) on the outer peripheral surface of the valve hole (13c) of the sleeve valve body (13) and the thickness of the sleeve valve body (13). The sleeve valve according to any one of claims 1 to 3, wherein (t2, d) is equal to or greater than (t2, d2).   The size (w2) of the discharge hole (21) over its entire length 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, wherein the thickness (t2) is equal to or greater than (W2 ≧ t1, t2).

Images