JP6924095B2 - Sleeve valve - Google Patents

Description

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

As a sleeve valve of this type, for example, 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 of the cylindrical valve box 11 shown in FIGS. A cylinder 12 whose one side is closed is provided on the same shaft, and a sleeve valve body 13 having a perforated wall (plural valve holes) 13c is provided in the cylinder 12 so as to be movable on the same shaft (Patent). References 1 paragraphs 0002 to 0004, FIG. 5 and the like).

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. 8, 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 body 13.

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 in the distribution direction (left and right in FIG. 7) 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 both valve seats 14a and 14b are not in contact with each other when the valve is opened (state of FIG. 8). ), 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.

As shown in FIGS. 7 and 8, the sleeve valve 10 rotates the valve shaft 15 so that the valve hole 13c of the sleeve valve body 13 faces the gap 16 between the cylinder 12 and the valve box 11 via the link mechanism 17. Then, 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, 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.

Japanese Unexamined Patent Publication No. 2000-97354

In the sleeve valve, the fluid a that has passed through the porous 13c and has flowed into the sleeve valve body 13 causes cavitation to generate many bubbles, and the bubbles burst at or near the inner surface of the outflow pipe 2 to cause the above. The inner surface is damaged.

In view of the above circumstances, it is an object of the present invention to reduce the number of air bubbles reaching the inner surface of the outflow pipe 2 to reduce damage to the inner surface.

To achieve the above object, the present invention is the body the sleeve valve, the spiral vanes of the valve member coaxially provided, by the vane, to collide with one another gather around the formed bubbles to pressure corrupted by I decided to do it.
If the air bubbles are broken, the damage to the inner surface due to the collision of the air bubbles with the inner surface of the outflow pipe is eliminated.

The specific configuration of the present invention is that an inflow pipe is connected to one end of a 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 the cylinder is provided. In the in-line type sleeve valve in which the sleeve valve body is provided so as to be movable on the same axis on the downstream side, a configuration is adopted in which a spiral blade coaxial with the valve body is provided inside the sleeve valve body.

With this configuration, the spiral blades apply a rotational force toward the center to the fluid that has reached the inside of the sleeve valve. Therefore, to pressure corrupted by colliding with each other together also central air bubbles generated in the fluid.

The spiral blade may be in any form as long as the fluid is concentrated in the center. For example, a conical member coaxial with the valve body is provided in the sleeve valve body so that the tip thereof is on the outflow pipe side. A spiral groove may be formed on the outer peripheral surface of the conical member to form the spiral blade on the outer peripheral surface of the conical member.
At this time, a fixed arm may be formed extending from the tip of the conical member to the sleeve valve body, and the length direction of the arm may be twisted in the same direction as the spiral groove. Thus, by this arm, it is performed action centralizing the fluid, pressure of said bubble corrupted is promoted.

The present invention, configured as described above. Thus centralizing fluid enters the body sleeve valve, bubble pressure corrupted caused by the inflow, etc. is accelerated. Therefore, damage to the inner surface of the outflow pipe due to the destruction of air bubbles can be reduced.

A cut plan view of an embodiment of a sleeve valve according to the present invention. (A) is a partially cut right side view of the same embodiment, and (b) is a partially enlarged perspective view of (a). The spiral body of the same embodiment is shown, (a) is a perspective view, and (b) is a right side view. The main parts of each of the other embodiments are shown, (a) is a cross-sectional view of one embodiment, and (b) is a perspective view of another embodiment. The cut plan view of the same and yet another embodiment. The cut plan view of the same and yet another embodiment. Cutting plan view of an example of a conventional sleeve valve Front view of the cut for explaining the operation of the conventional example Front view of cutting for explaining the same effect

An embodiment of the sleeve valve according to the present invention is shown in FIGS. 1 to 3, 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. 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 both of them, 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 (fluid) 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. 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 body 13 (see FIG. 8).

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 FIGS. 7 to 9), and the cylindrical hole (straight hole) due to the truncated cone shape. The effect of suppressing cavitation is higher than that of.

The valve shaft 15 is connected to the boss 18 of the sleeve valve body 13 by a link mechanism 17, and the link mechanism 17 has the same configuration as the link mechanism 17 shown in FIGS. 7 to 9 described above. 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 both valve seats 14a and 14b are not in contact with each other when the valve is opened (state of FIG. 8). (See), 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. ..

The above configuration is the same as the conventional one, and this embodiment is characterized in that the spiral body 20 and its support arm 21 are provided in the sleeve valve body 13.
As shown in FIG. 3, the spiral body 20 forms a plurality of spiral grooves 22 on the outer surface of a solid cone, and the ridge line portion between the grooves 22 is a spiral blade. The number of grooves 22 is arbitrary as long as it exerts the following smooth actions. The spiral body 20 is manufactured by casting, cutting, or the like, and the base portion 23 is fixed to the same shaft by screwing it to the connecting rod support portion of the sleeve valve body 13.

The tip 20a of the spiral body 20 is fitted with a boss 21a of its support member. The support member is provided with arms (fins) 21 radially from the boss 21a, and the arms 21 reach a ring 24 fixed to the sleeve valve body 13. The number of arms 21 is arbitrary, and as shown in FIG. 2B, the surface of the arms 21 is twisted. By this twist, the fluid a passing between the arms 21 is collected in the center. The arm 21 may not be twisted and may only act as a support member of the spiral body 20. In the figure, 25 is a bolt through hole.

The twisting direction of the spiral groove 22 and the arm 21 is counterclockwise toward the tip of the spiral body 20, but may be clockwise. The twisting direction is appropriately set according to the gap 16 of the fluid a and the flow mode of the fluid a in the sleeve valve body 13. For example, if a large number of valve holes 13c form a counterclockwise spiral and the fluid a flows counterclockwise, the twisting direction of the spiral groove 22 is also counterclockwise.

With the spiral body 20 and the arm 21, the fluid a that has reached the inside of the sleeve valve body 13 through the valve hole 13c passes through the porous body 13c because the spiral body 20 applies a rotational force toward the center. bubbles generated Te also gathered in the center to pressure corrupted by colliding with each other. Also, by the arm 21, since the fluid a is collected in the center, the bubble is pressure corrupted.

The spiral body 20 is not solid and can be hollow as shown in FIG. 4 (a). Further, the spiral blade that collects the fluid a at the center is not limited to the spiral body 20, and any mode is arbitrary as long as the action of collecting the fluid a is performed. For example, as shown in FIG. 4B, the spiral blade has a spiral shape. It is conceivable that the ridge line portion between each of the grooves 22 is formed by a spiral-shaped blade 31, or as shown in FIG. 5, a spiral-shaped blade 32 is provided on the inner surface of the sleeve valve body 13. At this time, it is preferable that the blade 32 does not cover (do not block) the valve hole 13c along the spiral shape of the valve hole 13c.

In each of the above embodiments, the sleeve valve body 13 has a large number of valve holes 13c, but as shown in FIG. 6, the sleeve valve body 13 may have no valve holes 13c. Similarly, in the sleeve valve 10 of this embodiment, when the valve shaft 15 rotates, the sleeve valve body 13 moves back and forth in the distribution direction (left and right in the figure) via the link mechanism 17.
Along with the movement, flow rate control or pressure control is performed by the degree of gap between the valve seat 14a at the tip of the sleeve valve body 13 and the valve box valve seat 14b, and the valve is closed by the contact between the valve seats 14a and 14b (chain line state). ..
Also in this embodiment, the fluid a flowing in front of the sleeve valve body 13 (on the right side in FIG. 6) is given a rotational force toward the center by the spiral body 20, and the generated bubbles also gather at the center and collide with each other. to pressure corrupted by.
Also in this embodiment, it is preferable that the spiral body 20 is supported by a support member. At this time, the ring 24 of the support member is fixed to the arm piece 26 extending forward from the tip end portion of the sleeve valve body 13 by screwing or the like. The number of arm pieces 26 is arbitrary around the sleeve valve body 13, but is preferably evenly spaced.

In each embodiment, the movement of the sleeve valve body 13 is not limited to the link mechanism 17, but a conventional screw mechanism (a mechanism including Patent Document 1, a flange 27, a shaft body 28, a screw shaft 29, etc.) and the like. Various means can be adopted.
Thus, the embodiments disclosed this time should be considered to be exemplary in all respects and not restrictive. The scope of the present invention is indicated by the claims and is intended to include all modifications within the meaning and scope equivalent to the 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 mechanism 17a Crank 17b Connecting rod 18 Boss 20 Spiral body 21 Arm (fin)
22 Spiral groove 23 Base of spiral body 24 Fixing ring of spiral body a Water (fluid)

Claims (3)

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 the sleeve valve body (13) is provided in the cylinder (12) so as to be movable on the same shaft on the downstream side.
Spiral blades (22, 31, 32) coaxial with the valve body are provided in the sleeve valve body (13), and the fluid (a) reached into the sleeve valve body (13) by the spiral blades. A sleeve valve characterized in that a rotational force toward the center is applied , and bubbles in the fluid (a) are collected at the center and collide with each other to be crushed. A conical member (20) coaxial with the valve body (13) is provided in the sleeve valve body (13) so that the tip thereof is on the outflow pipe (2) side, and the outer circumference of the conical member (20) is provided. The sleeve valve according to claim 1, wherein a spiral groove (22) is formed on the surface, and the spiral blade is formed on the outer peripheral surface of the conical member (20). A fixed arm (21) is formed by extending from the tip of the conical member (20) to the sleeve valve body (13), and the length direction of the arm (21) is twisted in the same direction as the spiral groove. The sleeve valve according to claim 2, wherein the sleeve valve is characterized in that.

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