JP2019027566A - Sleeve valve - Google Patents

Abstract

To reduce damage of an inner face of an outflow pipe 2 by reducing bubbles reaching the inner face.SOLUTION: In an in-line sleeve valve 10, an inflow pipe 1 is connected to one end of a cylindrical valve chest 11, an outflow pipe 2 is connected to the other end, a cylinder 12 closed at an inflow pipe side is coaxially disposed in the valve chest, a sleeve valve element 13 having multiple pores 13c on a peripheral wall is coaxially movably disposed in the cylinder, and sliding faces of the valve chest and the sleeve valve element are applied as valve seats 14a, 14b. A spiral body 20 and its supporting arm 21 are disposed in the sleeve valve element 13. By the spiral body and the arm, torque toward a center is applied to a fluid a reaching the inside of the sleeve 13 through the pores 13c. Thus the bubbles generated in passing the pores are collected at the center and collided with each other to be crushed. As the bubbles do not exist, damage of an inner face of the outflow pipe caused by breakage of the bubbles can be prevented.SELECTED DRAWING: Figure 1

Description

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

  As this type of sleeve valve, for example, as shown in FIGS. 7 to 8, 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. A cylinder 12 closed on one side is provided on the same shaft, and a sleeve valve body 13 whose peripheral wall is partially porous (a plurality of valve holes) 13c is provided in the cylinder 12 so as to be movable on the same axis (patent) Reference 1 paragraphs 0002-0004, FIG. 5 etc.).

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. 8, 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 body 13.

A crank 17a in the radial direction (around the shaft) is fixed to the valve shaft 15, and a connecting rod 17b is rotatably connected to the tip of the crank 17a to constitute a link mechanism 17. The tip of the connecting rod 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 back and forth in the flow direction (left and right in FIG. 7) via the link mechanism 17.
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. 8). ), 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.

  As shown in FIGS. 7 and 8, the sleeve valve 10 rotates the valve shaft 15 so that the valve hole 13 c 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 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.

JP 2000-97354 A

  In the above-described sleeve valve, the fluid a that has flowed into the sleeve valve body 13 through the porous 13c causes cavitation to generate many bubbles, and the bubbles burst on the inner surface of the outflow pipe 2 or in the vicinity thereof. The inner surface is damaged.

  This invention makes it a subject to reduce the damage to the said inner surface by reducing the bubble which reaches the inner surface of the said outflow piping 2 in view of the above condition.

In order to achieve the above object, according to the present invention, a spiral blade that is coaxial with the valve body is provided in the sleeve valve body, and the generated bubbles are gathered around the center and collided with each other to be squeezed. It was decided.
If the bubble breaks, the inner surface is not damaged by the collision of the bubble with the inner surface of the outflow pipe.

  A specific configuration of the present invention is such that an inflow pipe is connected to one end of a cylindrical valve box and an outflow pipe is connected to the other end, and a cylinder closed on the inflow pipe side is provided in the valve box on the same shaft. 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 in which a spiral blade that is coaxial with the valve body is provided in the sleeve valve body is adopted.

  With this configuration, a rotational force toward the center is applied to the fluid reaching the sleeve valve body by the spiral blade. For this reason, the bubbles generated in the fluid also gather at the center and collide with each other to be overwhelmed.

The spiral blade may be in any form as long as the fluid collects in the center. For example, a conical member coaxial with the valve body is placed in the sleeve valve body so that the tip thereof is on the outflow piping side. The spiral blade is formed on the outer peripheral surface of the conical member by forming a spiral groove on the outer peripheral surface of the conical member.
At this time, an arm extending from the distal end portion of the conical member to the sleeve valve body may be formed, and the length direction of the arm may be twisted in the same direction as the spiral groove. If it does in this way, the effect | action which gathers a fluid will be performed also by the arm, and the compression of the said bubble will be accelerated | stimulated.

  Since the present invention is configured as described above and collects the fluid that has entered the sleeve valve body in the center, the compression of bubbles generated by the inflow thereof is promoted. For this reason, the damage of the outflow piping inner surface by destruction of a bubble can be reduced.

Cutting top view of one embodiment of a sleeve valve according to the present invention (A) is a partially cut right side view of the same embodiment, (b) is a partially enlarged perspective view of (a). The spiral body of the embodiment is shown, (a) is a perspective view, (b) is a right side view. The principal part of each other embodiment is shown, (a) is sectional drawing of one embodiment, (b) is a perspective view of other embodiment. Cutting plan view of still another embodiment Cutting plan view of still another embodiment Cutting plan view of an example of a conventional sleeve valve Cutting front view for explaining the operation of the conventional example Cut front view for explaining the operation

  1 to 3 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 perpendicular to the flow direction of the water (fluid) 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. The valve seat 14a contacts the valve box valve seat 14b having the same inclined surface by the movement of the sleeve valve body 13, thereby closing the sleeve valve 10 (see FIG. 8).

  The valve hole 13c has a truncated cone shape that is reduced in diameter toward the axial center of the sleeve valve body 13 (see FIGS. 7 to 9). By this truncated cone shape, a cylindrical hole (straight hole) Compared with, cavitation suppression effect is high.

The valve shaft 15 is connected to a 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 described above with reference to FIGS. 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. 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 into the outflow pipe 2. .

The above-described configuration is the same as that of the prior art, and this embodiment is characterized in that a 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 is formed with a plurality of spiral grooves 22 on the outer surface of a solid cone, and the ridges between the grooves 22 are spiral blades. The number of the grooves 22 is arbitrary as long as the following smooth action is exhibited. The spiral body 20 is manufactured by casting, cutting, or the like, and fixed to the same shaft by screwing the base portion 23 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 the support member. The support member is provided with arms (fins) 21 radially from the boss 21 a, and the arms 21 reach a ring 24 fixed to the sleeve valve body 13. The number of arms 21 is arbitrary, and the surface of the arm 21 is twisted as shown in FIG. By this twisting, the fluid a passing between the arms 21 is collected at the center. The arm 21 may be only the action of the support member of the spiral body 20 without being twisted. 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 the numerous valve holes 13c have a counterclockwise spiral shape and the fluid a flows counterclockwise, the twist direction of the spiral groove 22 is also counterclockwise.

  When the spiral body 20 and the arm 21 are provided, the fluid a that has reached the sleeve valve body 13 through the valve hole 13c is given a rotational force toward the center by the spiral body 20, and thus passes through the porous 13c. Bubbles generated in this way also gather at the center and collide with each other and be overwhelmed. Moreover, since the fluid a is also collected in the center by the arm 21, the bubbles are crushed.

  The spiral body 20 is not solid and can be hollow as shown in FIG. In addition, the spiral blade that collects the fluid a at the center is not limited to the spiral body 20, and any mode can be used as long as the action of collecting at the center is performed. For example, as shown in FIG. It is conceivable that the ridge line portion between the grooves 22 is formed by a spiral blade 31 or a spiral blade 32 is provided on the inner surface of the sleeve valve body 13 as shown in FIG. At this time, it is preferable that the blade 32 is not covered (not blocked) 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. However, 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 flow direction (left and right in the figure) via the link mechanism 17.
Along with this movement, flow rate control or pressure control is performed according to the degree of clearance 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 contact of both valve seats 14a, 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 gather at the center and collide with each other. And be amazed.
In this embodiment as well, the spiral body 20 is preferably 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 distal end portion of the sleeve valve body 13 with screws or the like. The number of the arm pieces 26 is arbitrary around the sleeve valve body 13, but an equal interval is preferable.

In each embodiment, the movement of the sleeve valve body 13 is not limited to the link mechanism 17, such as a conventional screw mechanism (mechanism including a patent document 1, a flange 27, a shaft body 28, a screw shaft 29, etc.). Various means can be employed.
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 mechanism 17a Crank 17b Connecting rod 18 Boss 20 Spiral body 21 Arm (fin)
22 Spiral groove 23 Spiral base 24 Spiral fixing ring a Water (fluid)

Claims (3)

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 the sleeve valve body (13) is provided in the cylinder (12) so as to be movable on the same shaft on the downstream side.
A spiral blade (22, 31, 32) coaxial with the valve body is provided in the sleeve valve body (13), and the fluid (a) reaching the sleeve valve body (13) by the spiral blade is provided. A sleeve valve characterized by applying a rotational force toward the center.   A conical member (20) coaxial with the valve body (13) is provided in the sleeve valve body (13) so that its tip is on the outflow pipe (2) side, and the outer periphery of the conical member (20) The sleeve valve according to claim 1, wherein a spiral groove (22) is formed on a surface, and the spiral blade is formed on an outer peripheral surface of the conical member (20).   An arm (21) extending from the tip of the conical member (20) to the sleeve valve body (13) is formed, 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.

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