JP2020118218A - Sleeve valve - Google Patents

Abstract

To improve maintainability while keeping compactness.SOLUTION: The present invention relates to an in-line type sleeve valve 10 in which inflow piping 1 is connected to one end of a cylindrical valve box 11 and outflow piping 2 is connected to the other end. Inside of the valve box, a cylinder 12 in which the inflow piping side is closed is provided coaxially. Within the cylinder, a sleeve valve body 13 including a number of valve holes 13c on a peripheral wall is provided movably coaxially at a downstream side. On an inner surface of the valve box from the end of the cylinder at the outflow piping side through a gap 16, a sliding surface with the sleeve valve body including a valve box valve seat 14b corresponding to the valve seat 14a of the sleeve valve body is provided. An outflow piping side tip 13d of the sleeve valve body is enabled to be retracted to the inflow piping side away from the valve box valve seat 14b and through a clearance generated by the retraction between the outflow piping side tip of the sleeve valve body and the valve box valve seat, a fluid (w) can flow directly from the clearance to the outflow piping. Thus, the fluid flows directly from the inflow piping to the outflow piping side without interposing the valve holes of the sleeve valve body, such that stagnant dust B within the valve box also flows out and is discharged by the flow.SELECTED DRAWING: Figure 3

Description

The present invention relates to a sleeve valve which is attached to a middle or an end of a pipe for drawing water, water and sewage, industrial water, agricultural water, and hydroelectric power, and which controls a flow rate or a pressure by passing through a perforated sleeve.

This type of sleeve valve has a structure in which a gate on the outer circumference of a sleeve having a porous structure is driven (moved) in the axial direction to adjust the flow rate, or a structure in which the sleeve itself is driven to adjust the flow rate. There are (Patent Documents 1 and 2).

As a sleeve valve driven by the latter sleeve itself, for example, as shown in FIGS. 5 and 6, 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 thereof. A cylinder valve 12 having a closed inlet pipe 1 side is provided on the same shaft, and a sleeve valve body 13 having a part of a peripheral wall having a plurality of perforations (a plurality of valve holes) 13c is provided in the cylinder 12 so as to be movable on the same shaft. (See FIG. 1 of Patent Document 1).

In this sleeve valve 10', a valve shaft 15 is inserted into a valve box 11 at right angles to the flow direction of water w, and the valve shaft 15 is rotated by a handle or a drive machine (not shown).
The sleeve valve element 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 porous 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 diameter larger than that of the porous portion 13b, and a boundary between the guide portions 13a has a downward slope. As shown in FIG. 6, the valve seat 14a abuts the valve box valve seat 14b having the same inclined surface by the movement of the sleeve valve body 13 to close the sleeve valve 10'.

A crank 17a in the radial direction (around the axis) is fixed to the valve shaft 15, and a connecting rod 17b is rotatably connected to the tip of the crank 17a to form a link mechanism 17. The tip of the connecting rod 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 (left and right in FIG. 6) in the flow direction via the link mechanism 17.
Along with the movement, the valve holes 13c of the sleeve valve body 13 are 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 (FIG. 5, FIG. 6 state), the water w 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 to the outflow pipe 2. Circulate.
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 to adjust the number of the valve holes 13c facing the gap 16.

By the way, in this sleeve valve 10 ′, the fluid passing through the inside of the valve (inside the valve box 11) often contains foreign matter (dust) B such as sand, stone, and wood chips. This foreign substance may block (block) the hole of the sleeve (valve hole 13c) or may stay in the valve box 11 to prevent stable operation of the sleeve valve 10' (FIG. 1). reference).
For this reason, conventionally, a manhole for cleaning is provided in the valve box 11, and the manhole is opened to remove the accumulated foreign matter by hand, or a drain pipe (see the drain hole 20 in FIG. 1) is provided to remove dust from the drain pipe. By discharging a substance or providing a strainer or the like on the upstream side of the valve for removing the dust B, the dust B is not accumulated and the sleeve valve 10′ is stably operated (patented). References 1 and 2).

JP-A-58-50366 JP, 2000-97354, A

The operation of removing the dust B from the manhole requires stopping the water, and the water stopping may cause damage to the equipment. In some cases, the water cannot be stopped due to the influence on the downstream equipment. Further, it is difficult to deal with the problem of labor shortage in recent years and the convenience of maintenance required from the viewpoint of life cycle.
Also, because the installation cost including the drain pipe will increase and the space inside the valve box will be limited, there is a limit to the size of the drain pipe that can be installed in the valve. When the dust of the above is accumulated inside the valve, there is a problem that the dust cannot be discharged through the drain pipe.

In view of the above situation, it is an object of the present invention to improve maintainability while maintaining compactness.

In order to achieve the above object, the present invention allows a sleeve valve element to be separated from a valve box valve seat so that a fluid from an inflow pipe flows out from a distance between the sleeve valve element and a valve hole of the sleeve valve element. It was designed to flow directly to the piping side.
Thus, if the fluid directly flows from the inflow pipe to the outflow pipe without passing through the valve hole of the sleeve valve body, the accumulated dust in the valve box also flows out and is discharged by the flow.

Specifically, an inflow pipe is connected to one end of the tubular valve box, and an outflow pipe is connected to the other end thereof.A cylinder whose inflow pipe side is closed is provided on the same shaft in the valve box, and a peripheral wall is provided in the cylinder. A sleeve valve body with many valve holes is movably provided on the same shaft on the downstream side. In a sleeve valve having a sliding surface with a sleeve valve element having a valve seat, the end of the sleeve valve element on the outflow piping side can be moved away from the valve box valve seat to the inflow piping side, and the sleeve valve caused by the withdrawal The structure is such that the fluid passes directly between the tip of the body on the outflow pipe side and the valve box valve seat, and the fluid flows directly from the gap to the outflow pipe.

In this configuration, the valve shaft laterally inserted into the valve box and the sleeve valve body are connected by a link mechanism including a crank fixed to the valve shaft and a connecting rod rotatably connected to the sleeve valve body. Based on the rotation of the valve shaft, the sleeve valve element is moved to the same axis by the link mechanism, and the rotation axis of the valve shaft is opposite to the connecting point of the crank and the connecting rod from the center line of the valve box in the piping direction. It is possible to adopt a mode in which it is shifted to the side.
According to this aspect, since the rotation area of the crank can be made large, the rotation (operating) angle of the crank can be increased, and the moving length (stroke) of the sleeve valve element can be increased. Being able to increase the moving length of the sleeve valve body has an advantage that the sleeve valve body can be easily separated from the valve box valve seat.

The present invention is configured as described above so that the sleeve valve body can be separated from the valve box valve seat, and the fluid from the inflow pipe does not go through the valve hole of the sleeve valve body and flows out from the outflow pipe side from the distance. Since it is allowed to directly flow to the valve, the accumulated dust in the valve box can be smoothly discharged by simply changing the configuration of the valve structure. Therefore, maintainability can be improved while maintaining compactness.

Front cutaway view of an embodiment of a sleeve valve according to the present invention Cutting front view for explaining operation of the embodiment Cutting front view for explaining the operation of the embodiment Partial front view for explaining the operation of the embodiment A cutaway plan view of an example of a conventional sleeve valve Cutaway front view of the conventional example

An embodiment of the sleeve valve according to the present invention is shown in FIGS. 1 to 4, and an inline type sleeve valve 10 of this embodiment is attached to a horizontal or vertical pipe portion of a water intake pipe from a river, As in the prior art, as shown in FIG. 1, a cylinder valve box 11 is connected to an inflow pipe 1 at one end and an outflow pipe 2 at the other end, and the inside of the valve box 11 is closed on the inflow pipe 1 side. 12 is provided on the same axis, and a sleeve valve element 13 having a part of the peripheral wall (a plurality 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 integrally formed product such as a welded product. The tip of the cylinder 12 (on the side of the inflow pipe 1) is formed in a streamlined shape to reduce water resistance. A valve shaft 15 is inserted into the valve box 11 at right angles to the flow direction of the water w, 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 porous portion 13b in which a large number of valve holes 13c are spirally arranged on the outer peripheral portion thereof. ing. The guide portion 13a has a larger diameter than the porous portion 13b, and its boundary forms a downward slope step, and the downward slope step forms the valve seat 14a of the sleeve valve body 13. The sleeve valve body 13 projects from the cylinder 12 and is slidably fitted into the cylindrical portion of the valve box 11 on the side of the outflow pipe 2 through a gap 16, and the sliding surface has a boundary portion with the gap 16. Is the valve box valve seat 14b.
That is, sliding of the sleeve 12 on the inner surface of the valve box 11 from the end of the cylinder 12 on the side of the outflow pipe 2 through the gap 16 and the sleeve valve body 13 having the valve box valve seat 14b corresponding to the valve seat 14a of the sleeve valve body 13. The surface is provided. Therefore, as shown in FIG. 2, the valve seat 14a is brought into contact with (close to) the valve box valve seat 14b having the same inclined surface by the movement of the sleeve valve 13 to close the sleeve valve 10.

The valve hole 13c has a frustoconical shape whose diameter decreases toward the axial center of the sleeve valve body 13. Due to this frustoconical shape, the cavitation suppressing effect is higher than that of the cylindrical hole (straight hole). .. On the other hand, since the taper shape is tapered toward the flow direction, foreign matters such as wood chips and dust flowing from the upstream side tend to be easily clogged. In general, foreign matter larger than the valve hole 13c (wood chips, coal scraps, etc.) is filtered by the perforations 13c and does not enter the sleeve valve body 13, but foreign matter smaller than the outer surface diameter of the valve hole 13c (small diameter) is the valve hole 13c. It is easy to get inside and get clogged.

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

The configuration described above is the same as the conventional one, and the feature of this embodiment is that the axis o of the valve shaft 15, that is, the fixed point (rotation center) of the crank 17a to the valve shaft 15 is the piping direction of the valve box 11. It is displaced (offset) from the center line c to the opposite side of the connecting point a between the crank 17a and the connecting rod 17b. The connection point b between the sleeve valve element 13 and the connecting rod 17b is on the center line c of the valve box 11 in the piping direction, as in the conventional case.

Since the fixed point (axial center) o is displaced to the opposite side of the connection point a, the rotation area of the crank 17a can be made large, so that the rotation (operating) angle of the crank 17a can be increased and the sleeve valve body The movement length (stroke) of 13 can be expanded. Therefore, it is possible to increase the moving length of the sleeve valve element 13 so that the sleeve valve element 13 can be sufficiently separated from the valve box valve seat 14b without enlarging the valve box 11. That is, the sleeve valve body 13 can be largely retracted, and as shown in FIG. 3, the outflow pipe side tip 13d of the sleeve valve body 13 is sufficiently separated from the valve box valve seat 14b and can be retracted to the inflow pipe side. Become.
In the figure, 20 is a drain pipe (hole), and the cutting plane is almost the same as that in FIG.

The sleeve valve 10 of this embodiment has the above-described configuration, and as shown in FIGS. 1 and 2, the valve shaft 15 is rotated to form the sleeve valve body in the gap 16 between the cylinder 12 and the valve box 11 via the link mechanism 17. When the valve hole 13c of 13 is exposed, the water a from the inflow pipe 1 flows into the sleeve valve body 13 through the valve hole 13c 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 to adjust the number of the valve holes 13c facing the gap 16.

In this operation, as shown in FIG. 1, if the dust B stays in the valve box 11, as shown in FIG. 3, the valve shaft 15 is rotated so that the end 13d on the outflow piping side of the sleeve valve body 13 is valved. When it is moved away from the box valve seat 14b to the inflow pipe 1 side, the water w in the gap 16 passes between the valve pipe valve seat 14b and the outflow pipe side end 13d of the sleeve valve body 13 caused by the withdrawal. Directly flows into the outflow pipe 2.
With the circulation of the water w, the dust B in the valve box 11 is also sent to the outflow pipe 2, and the inside of the valve box 11 is cleaned.

Further, as shown in FIGS. 4(a) to 4(b), as the outflow pipe side tip 13d of the sleeve valve body 13 moves away from the valve box valve seat 14b, the dust particles B clogged in the valve hole 13c are removed by the sleeve valve. It is sandwiched between the outer peripheral surface of the body 13 and the valve seat 14a and is peeled off (see FIG. 4B). Further, the water w flowing from the gap 16 to the outflow pipe side reaches the inside of the sleeve valve body 13 to a considerable extent and flows from the inside of the valve hole 13c to the outside (gap 16 side) to push out the dust B clogged in the valve hole 13c. And sends it to the outflow pipe 2.
For this reason, as described above, since the valve hole 13c has a truncated cone shape, foreign matters B such as wood chips and dust are likely to be clogged, but the dust particles B clogged in the valve hole 13c are also sent to the outflow pipe 2 to cause the sleeve. Cleaning of the valve body 13 is also smoothly performed.
When these cleanings are completed, as shown in FIGS. 1 and 2, the sleeve valve body 13 is fitted into the valve box valve seat 14b by the rotation of the valve shaft 15 to adjust the axial position of the sleeve valve body 13. By adjusting the number of valve holes 13c exposed by the gap 16 to shift to the operation of performing normal flow rate control or pressure control.

In the above-described embodiment, the sleeve valve body 13 is moved by the link mechanism 17, but as long as it is possible to separate the outflow piping side end 13d of the sleeve valve body 13 from the valve box valve seat 14b and to be able to retreat to the inflow piping side, The sleeve valve body 13 can be moved by a gear mechanism described in Document 1, a screw mechanism described in Patent Document 2, or the like.
As described above, it should be considered that the embodiments disclosed this time are illustrative in all points and not restrictive. The scope of the present invention is shown by the claims, and is intended to include meanings equivalent to the claims and all modifications within the scope.

1 Inflow Pipe 2 Outflow Pipe 10 Sleeve Valve 11 Valve Box 12 Cylinder 13 Sleeve Valve Body 13a Sleeve Valve Body Guide 13b Same Porous Portion 13c Valve Hole (Perforated)
13d Outflow piping side tip of sleeve valve body 14a Sleeve valve body side valve seat 14b Valve box valve seat 15 Valve shaft 16 Gap 17 Link mechanism 17a Crank of link mechanism 17b Same connecting rod a Connecting point of crank and connecting rod c Center of piping direction of valve box Line o Center of rotation of valve shaft w Water (fluid)

Claims (2)

An inflow pipe (1) is connected to one end of the tubular valve box (11) and an outflow pipe (2) is connected to the other end of the tubular valve box (11), and a cylinder (11) is closed in the valve box (11). 12) is provided on the same shaft, and a sleeve valve body (13) having a large number of valve holes (13c) in its cylinder (12) is provided movably on the same shaft on the downstream side. A valve box valve seat (14b) corresponding to the valve seat (14a) of the sleeve valve body (13) is provided on the inner surface of the valve box (11) through the gap (16) from the end on the outflow pipe (2) side. A sleeve valve (10) having a sliding surface with a sleeve valve body (13), which comprises:
The end (13d) of the sleeve valve body (13) on the outflow pipe side can be moved away from the valve box valve seat (14b) to the inflow pipe side, and the outflow pipe of the sleeve valve body (13) caused by the retreat. A sleeve valve in which a fluid (w) is allowed to flow directly from the gap (16) to the outflow pipe (2) through a side tip (13d) and the valve box valve seat (14b). The valve shaft (15) laterally inserted into the valve box (11), the sleeve valve body (13), the crank (17a) fixed to the valve shaft (15), and the sleeve valve body (13). 13) is connected by a link mechanism (17) that is rotatably connected to a connecting rod (17b), and based on the rotation of the valve shaft (15), the sleeve valve body (13) is connected by the link mechanism (17). On the same axis as above,
Moreover, the rotational axis (o) of the valve shaft (15) is connected to the connecting point (a) of the crank (17a) and the connecting rod (17b) from the center line (c) of the valve box (11) in the piping direction. The sleeve valve according to claim 1, wherein the sleeve valve is offset to the opposite side.

Images