JP2004162822A - Multi-directional selector valve - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a multi-directional selector valve having improved operationality, sealing performance and durability and enabling setting of its closed condition. <P>SOLUTION: A spherical valve element 3 is stored in a valve chamber 21 of a body 2, a first flow path 71 and a second flow path 72 are provided perpendicular to the rotating shaft of the valve element 3, and a space is provided between the valve element 3 and the body 2 to form a distribution part 22. A third flow path 73 is connected to the distribution part 22. The valve element 3 has a connection port 312 to be connected either to the first flow path 71 or to the second flow path 72, depending on its rotating position, and an opening 311 always open to the distribution part 22. In the state that the connection port 312 of the valve element 3 is connected neither to the first flow path 71 nor to the second flow path 72, all flow paths 71, 72, 73 are in closed conditions. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a multidirectional switching valve, and more particularly, to a multidirectional switching valve using a ball-shaped valve element.
[0002]
[Prior art]
The conventional three-way valve has three inlets / outlets for the fluid, and has a configuration in which the direction in which the fluid flows is changed according to the rotational position of the conical plug. Hereinafter, a configuration of a conventional three-way valve will be briefly described with reference to the drawings. FIG. 9 is a sectional plan view of the three-way valve, and FIG. 10 is a sectional side view of the same. A plug 92 having a taper is rotatably inserted into the main body 91 of the valve, and a space between the taper surface 921 of the plug 92 and the plug accommodating portion 93 of the main body 91 is filled with a lubricant such as grease. Sealed. As shown in FIG. 9, a flow path 94 is formed in the plug 92, and both end openings 941 of the flow path 94 are formed so that their respective axes are orthogonal to each other on the axis O1 of the rotation axis of the plug 92. , 942 are provided. Further, three flow paths 911, 912, 913 are formed in the main body 91, and the axes n1, n2, n3 of the flow paths 911, 912, 913 are orthogonal to the axis O1 of the rotation axis of the plug 92. It is included in a plane, and is configured to be orthogonal to each other at the intersection of this plane and the axis O1 of the rotation axis of the plug 92.
[0003]
In the above configuration, when the plug 92 is rotated in units of 90 degrees, both ends 941 and 942 of the flow path 94 are connected to the flow path 911 and the flow path 912 or the flow path 912 and the flow path 913, respectively. The state is switched to a state in which the flow paths 911 and 912 communicate with each other, a state in which the flow paths 912 and 913 communicate with each other, or a state in which none of the flow paths communicates (closed state).
Further, such a three-way valve has the following conventional technology.
[0004]
[Patent Document 1]
JP-A-11-304031.
[Patent Document 2]
JP-A-2000-291813.
[Patent Document 3]
JP-A-2002-228023.
[0005]
[Problems to be solved by the invention]
However, such a conventional three-way valve has the following problems. Since the plug rotates while making surface contact with the valve body on the tapered surface, resistance at the time of operating the plug is large, a large amount of torque is required for cock operation, and the durability of the valve itself is low. In addition, the service life of the lubricant for ensuring the sealing property is short.
Further, there are design restrictions that the flow paths provided in three directions need to be orthogonal to the axis of the rotation axis of the plug. Such a restriction is similarly recognized, for example, in a three-way valve (see Patent Documents 1 to 3) in which the valve body is a spherical body.
SUMMARY OF THE INVENTION An object of the present invention is to provide a multi-directional switching valve capable of setting a closed state with improved operability, sealability and durability.
[0006]
[Means for Solving the Problems]
The present invention that achieves the above object has the following configuration.
(1) the main body,
A valve chamber formed in the body,
A rotary body-shaped valve body rotatably housed in the valve chamber;
A first flow path having a first opening in the valve chamber;
A second flow path having a second opening in the valve chamber;
A third flow path having a third opening in the valve chamber;
A connection port provided on the valve body, the axis of which is orthogonal to the rotation axis of the valve body, and a trajectory of the connection port drawn when the valve body rotates about the rotation axis, deviated from the trajectory. An opening provided at a position and a valve body flow passage provided at both ends and an operation shaft connected to the valve body at one end, and an operation shaft connected to operating means at the other end. Prepare,
The first opening and the second opening are provided at positions where their axes are respectively orthogonal to the rotation axis of the valve body, and depending on the rotation position of the valve body, the connection port of the valve body flow path is formed as described above. It is configured to be connected to either the first opening or the second opening, and communicates the third opening and the opening of the valve body flow passage outside the valve body in the valve chamber. A multidirectional switching valve, wherein a flow portion is formed.
[0007]
(2) The respective axes of the first opening and the second opening are located on one straight line orthogonal to the rotation axis of the valve body, and the first opening and the second opening are located around the first opening and the second opening. The multi-directional switching valve according to the above (1), in which an O-ring-shaped seal member is inserted.
[0008]
(3) The multidirectional switching valve according to the above (1) or (2), wherein the valve body has a rotational position that closes both the first opening and the second opening.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. An embodiment of the present invention described below is a three-way switching valve 1. 1 is a side sectional view of the three-way switching valve 1, FIG. 2 is an overall plan view, FIG. 3 is an overall front view, and FIG. 4 is a sectional rear view.
The three-way switching valve 1 includes a valve body 2, a valve body 3 rotatably housed in the valve body 2, and operation means 4 for rotating the valve body 3. The valve body 2 includes a base body 5 that houses the valve body 3 and a lid body 6 that is screwed into the base body 5 to form a valve chamber 21 therein.
[0010]
The base 5 includes a connection opening 52 having a female screw portion 51 into which the lid 6 is screwed. A space 53 in which the valve chamber 21 is formed is formed in a deep portion of the connection opening 52, and further, In the space 53, the second flow path 72 communicates with the opposite side of the connection opening 52 through the second opening 721. The valve chamber 21 communicates with an insertion hole 53 through which the operation shaft 41 constituting the operation means 4 is inserted.
In addition, as shown in FIG. 2 or FIG. 4, a third flow path 73 is formed in the base 5 in a direction orthogonal to the second flow path 72, and one end of the third flow path 73 is provided. Communicates with the valve chamber 21 via the third opening 731.
[0011]
The lid 6 is formed in a cylindrical shape, a first flow path 71 is formed in the center in the axial direction, and a first opening 711 is provided at the tip of the lid 6. A male screw portion 61 that is screwed into the connection opening 52 of the base 5 is formed on the outer periphery of the distal end of the lid 6. A recess 62 is formed at the tip of the lid 6, and the above-described first opening 711 is formed at the center of the recess 62.
[0012]
The valve body 2 is configured by screwing a lid 6 on a base 5. The valve chamber 21 is formed by the space 53 of the base 5 and the recess 62 of the lid 6, and the valve 3 is housed in the valve chamber 21.
A valve body flow passage 31 is formed in the valve body 3, and an opening 311 at one end of the flow passage 31 is formed on the axis O ₀ (rotation axis) of the rotation axis of the valve body 3. The other end opening of the flow passage 31 is a connection port 312 connected to the first opening 711 and the second opening 721, and is orthogonal to the axis O ₀ of the rotation axis of the valve element 3. In the direction in which the axis is directed. In the valve element 3, a groove 32 is formed on the axis O ₀ of the rotation shaft on the opposite side of the opening 311, and the distal end joint portion 411 of the operation shaft 41 is joined to the groove 32.
[0013]
In the valve chamber 21, O-ring shaped seal members 211 a and 211 b are interposed between the valve body 3 and the inner wall of the valve chamber 21. The seal members 211a and 211b are arranged along the periphery of the first opening 711 and the second opening 721, and the connection port 312 of the valve body 3 is connected to the first opening 711 and the second opening 721. In the state, the hermeticity at the connecting portion between the first flow path 71 and the flow passage 31 or the hermeticity at the connecting portion between the second flow path 72 and the flow passage 31 is ensured, and the Ensure tightness.
[0014]
On the other hand, an O-ring shaped seal member is inserted between the operation shaft 41 and the inner wall of the insertion hole 53. The operation shaft 41 is rotatably supported by the insertion hole 53. The proximal end of the operation shaft 41 protrudes outside the insertion hole 53 and has a connection portion 412 formed with a male screw. The connecting portion 412 is formed with chamfers 412a and 412b parallel to each other, and a fitting hole 421 formed at one end of the handle 42 as an operating means is fitted into the chamfers 412a and 412b. . A handle 422 is provided at the other end of the handle 42. The handle 42 is fastened to the operation shaft 41 by a bolt 43 screwed to the connection portion 412. The direction of the handle 42 is attached so as to match the opening direction of the connection port 312 of the valve body 3, and the rotation position of the valve body 3 and the connection state of the flow path can be grasped by the direction of the handle 42. Has become.
[0015]
The valve body 2 configured as described above includes the three flow paths of the first flow path 71, the second flow path 72, and the third flow path 73, and the valve chamber 21 that stores the valve body 3. . The first flow path 71, the second flow path 72, and the third flow path 73 include a first opening 711, a second opening 721, and a third opening 731 communicating with the valve chamber 21, respectively. First opening 711, second opening 721, the axis m1, m @ 2, m3 passing through the center of the third opening 731, (on the axis _{O 0} of the rotating shaft of the valve body 3) centered in the valve body 3 crossed are doing. The first flow path 71, the valve chamber 21, and the second flow path 72 are arranged on the same straight line in this order.
[0016]
Therefore, the first opening 711 and the second opening 721 are located on the same axis, and are arranged in the valve chamber 21 at positions facing each other. In other words, the first opening 711 and the second opening 721 are configured such that the planes including the respective openings are parallel to each other.
In the valve body 2, a flow portion 22 is formed in the valve chamber 21 by a space formed between the valve body 3 and the valve body 3. The opening 311 of the flow passage 31 of the valve element 3 opens to the flow portion 22, and communicates with the third opening 731 opened in the valve chamber 21 via the flow passage 31.
[0017]
The operation of the three-way switching valve 1 of the present invention configured as described above will be described. As an example of the mode of use of the three-way switching valve 1, the three-way switching valve 1 is disposed in a conduit through which liquid such as oil flows in from the first flow path 71 and the second flow path 72 and flows out to the third flow path 73. The following description is based on the assumption that the As shown in FIGS. 1, 2, and 5, when the handle 42 is oriented toward the first flow path 71, the first opening 711 is connected to the connection port 312 of the valve body 3, and the liquid is From the first opening 711, through the flow passage 31 of the valve element 3, it flows into the flow part 22 from the opening 311 and flows out of the flow part 22 to the third flow path 73 through the third opening 731. .
[0018]
As shown in FIG. 6, from the position of the handle 4 shown in FIG. 5, the handle 4 is rotated clockwise by 90 degrees in a plan view to align the handle 4 with the extension of the axis m3 of the third flow path 73. When the position is switched to the position, the first opening 711 and the second opening 721 are closed by the valve body 3, and both the opening 311 and the connection port 312, which are both ends of the flow passage 31, are opened in the circulation part 22. In this state, the first flow path 71, the second flow path 72, and the third flow path 73 are all in a closed state in which they do not communicate with each other.
[0019]
Further, when the handle 4 is rotated to the right by 90 degrees in plan view from the position of the handle 4 shown in FIG. 6 to switch the handle 4 to a position aligned with the axis m2 of the second flow path 72, the second opening 721 is The connection port 312 of the valve 3 is connected, and the liquid flows from the second opening 721 through the flow passage 31 of the valve 3, flows into the flow section 22 from the opening 311, and flows from the flow section 22 to the third opening. Through 731, the fluid flows out to the third channel 73.
[0020]
Another configuration described above, the third flow path 73, as shown in FIG. 8, for the a plane containing the axis O ₀ and the axis m1, m2 of the rotary shaft, and the axis m3 orthogonal It does not need to be provided, and may be provided in the radial direction about a straight line including the axes m1 and m2. Further, a plurality of flow paths may be connected. Further, the extension of the axis m3 does not necessarily have to pass through the center of the valve body 3, and the extension of the axis m3 may be off the center P of the valve body 3, as shown in FIG.
[0021]
As described above, according to the multidirectional switching valve of the present invention, the setting of the third flow path 73 is less restricted, so that the range of design is expanded and the versatility is improved. Further, as described above, the configuration is not limited to the configuration in which the axes m1 and m2 of the first flow path 71 and the second flow path 72 are both located on a straight line. For example, if the intersect on the axis O ₀ of the rotating shaft of the valve body 3 may be configured such that the axis m1 and the axis m2 intersect at an angle of 120 degrees, if an additional 90 degrees or more, other Angle. In this case, the range in which the third flow path 73 can be set further increases.
[0022]
Further, in a case where the axis m1 and the axis m2 intersect at an angle of 120 degrees, in the plane including the axis m1 and the axis m2, the axis intersects the axis m1 and the axis m2 at 120 degrees, respectively. Four flow paths may be provided, and a fourth opening to which the connection port 312 connects may be provided in the valve chamber 21. In this case, the switching valve may be configured to guide the liquid flowing from the three-way inlets (first flow path, second flow path, and fourth flow path) to the third flow path 73.
[0023]
Furthermore, the formation position of the opening 311 of the valve body 3 is not particularly limited as long as the position is out of the trajectory of the connection port 312 formed when the valve body 3 rotates about the rotation axis. it may not be located on the axis O ₀ axis.
In the configuration described above, the flow direction of the liquid may be reversed, and the flow direction of the liquid is not particularly limited. Further, the operation means can adopt another configuration. For example, a drive shaft that is rotated by a power source such as a motor may be connected to the operation shaft 41, or an arm that swings by a cam mechanism or the like is connected to the distal end of the handle 42. There may be.
[0024]
【The invention's effect】
According to the first aspect of the present invention, it is possible to provide a multi-directional switching valve having a low operation resistance and a high sealing performance and improved durability. In addition, since the setting of the third flow path is less restricted, the range of design is widened and the versatility is improved.
[0025]
According to the second aspect of the present invention, since the first opening and the second opening are provided at positions sandwiching the valve body, the sealing effect of the sealing member is more effectively exerted.
According to the third aspect of the present invention, the first opening and the second opening can be closed at the same time depending on the rotational position of the valve body. It is possible to provide a multidirectional switching valve capable of:
[Brief description of the drawings]
FIG. 1 is a side sectional view of a three-way switching valve.
FIG. 2 is an overall plan view of a three-way switching valve.
FIG. 3 is an overall front view of the three-way switching valve.
FIG. 4 is a sectional rear view of the three-way switching valve.
FIG. 5 is a plan view schematically showing a position of a valve body of the three-way switching valve.
FIG. 6 is a plan view schematically showing a position of a valve body of the three-way switching valve.
FIG. 7 is a plan view schematically showing a position of a valve body of the three-way switching valve.
FIG. 8 is a cross-sectional rear view showing another configuration example of the three-way switching valve.
FIG. 9 is a cross-sectional plan view of a conventional three-way valve.
FIG. 10 is a cross-sectional side view of a conventional three-way valve.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Three-way switching valve 2 Valve main body 21 Valve room 22 Flowing part 3 Valve 31 Flow path 312 Connection port 4 Operating means 41 Operating shaft 71 First flow path 711 First opening 72 Second flow path 721 Second opening 73 Third flow path 731 Third opening

Claims (3)

Body and
A valve chamber formed in the body,
A rotary body-shaped valve body rotatably housed in the valve chamber;
A first flow path having a first opening in the valve chamber;
A second flow path having a second opening in the valve chamber;
A third flow path having a third opening in the valve chamber;
A connection port provided on the valve body, the axis of which is orthogonal to the rotation axis of the valve body, and the trajectory of the connection port drawn when the valve body rotates about the rotation axis, deviated from the trajectory. An opening provided at a position and a valve body flow path provided at both ends and an operation shaft arranged on the rotation axis of the valve body, one end connected to the valve body, and the other end connected to an operation means. Prepare,
The first opening and the second opening are provided at positions where their axes are respectively orthogonal to the rotation axis of the valve body, and depending on the rotational position of the valve body, the connection port of the valve body flow passage is formed as described above. It is configured to be connected to either the first opening or the second opening, and the third opening and the opening of the valve body flow passage communicate with the outside of the valve body in the valve chamber. A multidirectional switching valve, wherein a flow portion is formed. The respective axes of the first opening and the second opening are located on one straight line orthogonal to the rotation axis of the valve element, and O axes are provided around the first opening and the second opening, respectively. The multidirectional switching valve according to claim 1, wherein a ring-shaped seal member is interposed. 3. The multidirectional switching valve according to claim 1, wherein the valve body has a rotation position that closes both the first opening and the second opening. 4.

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