JP4446582B2 - Flow control valve - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a flow rate adjusting valve provided with a floating valve body for adjusting the flow rate of fluid flowing in a fluid passage.
[0002]
[Prior art]
As a flow control valve, a floating type valve body that is pushed up from the valve seat by the fluid pressure to switch from the closed state to the open state is disposed in the fluid passage, and the opening degree of the valve body is limited by the valve presser. The type of adjusting the flow rate by means of is known. In this type of flow rate adjusting valve, the space on the back side of the valve body and the fluid passage portion on the downstream side of the valve body are communicated with each other by a bypass path. The lift amount of the valve body in the flow rate adjusting valve, that is, the flow rate is uniquely determined by the cross-sectional area of the bypass passage.
[0003]
[Problems to be solved by the invention]
An object of the present invention is to enable precise and arbitrary flow rate adjustment in such a flow rate adjustment valve.
[0004]
[Means for Solving the Problems]
In order to solve the above-described problems, the present invention provides a fluid passage, a floating valve body that is pushed up from a valve seat by the pressure of fluid flowing through the fluid passage and switches from a closed state to an open state, and the valve body. A valve presser that presses the valve seat against the valve seat, a valve box that forms a moving space of the valve body, a rear side space of the valve body in the moving space, and a portion of the fluid passage that is downstream of the valve box a bypass passage communicating between the, and the opening control unit for controlling the opening of the bypass passage, have a, the opening control unit, an opening and closing valve for opening and closing the bypass passage,
And a connection mechanism that transmits the movement of the valve presser as an opening / closing operation of the opening / closing valve .
[0005]
Here, when the valve presser moves to a pressing position where the valve presser presses the valve body against the valve seat, the on-off valve moves to a position for closing the bypass passage in conjunction with the valve presser, and the valve presser is When it leaves | separates from the said pressing position, it can be set as the structure which moves to the position which increases the opening degree of the said bypass path according to the movement amount of the said valve pressing from the said pressing position in conjunction with the said valve pressing .
[0006]
Moreover, the said connection mechanism can be comprised by the arm by which one end is connected with the said valve retainer, and the said on-off valve is connected with the other end.
[0007]
At this time, the valve body is a sphere, the moving space is a cylindrical space in which the sphere can slide, the valve seat is a conical inner peripheral surface formed at one end of the cylindrical space, The valve presser can be configured to move with a predetermined stroke in the axial direction of the cylindrical space in the space on the back side of the valve body in the cylindrical space.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a flow control valve to which the present invention is applied will be described with reference to the drawings.
[0009]
(First embodiment)
FIGS. 1A and 1B are a schematic configuration diagram of a flow rate adjusting valve of this example and a perspective view illustrating an opening degree control unit of a bypass passage. As shown to Fig.1 (a), the flow regulating valve 1 is provided with the valve box 2 connected to the middle of the fluid pipe, for example, a water pipe. In this valve box 2, an upper flow channel 3 connected to an upstream water pipe and a lower flow channel 4 connected to a downstream water pipe are formed in a coaxial state. A circular opening 51 communicating these water passages 3 and 4 is formed between them.
[0010]
The conical inner peripheral surface of the circular opening 51 is a valve seat 6, and when the spherical valve body 7 is seated on the circular opening 51, the circular opening 51 can be sealed. Above the circular opening 51, a cylindrical valve chamber 5 having a circular inner peripheral surface on which the spherical valve body 7 can slide is inclined in a direction inclined to the downstream side of the direction perpendicular to the direction of the water passage axis. It extends. The valve body rear side space 5 </ b> A of the valve chamber 5 and the lower circulation water channel 4 communicate with each other by a bypass channel 41.
[0011]
The upper end opening of the valve chamber 5 is sealed with a first cap 52. The first cap 52 includes a cap body portion 52A and a cylindrical portion 54 extending vertically in a coaxial state from the center of the circular end surface. A screw hole 53 is formed so as to pass through the center of the circular end surface of the cap main body portion 52 </ b> A, and a cylindrical portion 54 extends coaxially with the screw hole 53. A valve presser bolt 8 for restricting the movement of the valve body 7 is screwed into the screw hole 53 in a coaxial state from the upper end opening side of the cylindrical portion 54.
[0012]
Further, the upper end opening of the cylindrical portion 54 is sealed by the second cap 55, and the upper end portion of the valve pressing bolt 8 protrudes through the opening opened in the center of the cap 55. This protruding portion functions as a knob for turning the valve retainer bolt 8. By operating this portion, the valve retainer bolt 8 can be moved in the axial direction. That is, the position of the lower end surface 8a holding the valve body 7 can be adjusted up and down.
[0013]
The valve retainer bolt 8 is formed with a pair of annular flanges 83 formed at regular intervals in a portion passing through the inside of the cylindrical portion 54 in a coaxial state, and a seal ring mounted between them. The valve chamber 5 is sealed by 83a.
[0014]
Next, the opening / closing control unit 9 of the bypass passage 41 includes an arm 84 having one end connected to the valve presser bolt 8 and an opening / closing valve 90 connected to the other end of the arm 84. The arm 84 is connected to the valve presser bolt 8 so as to move integrally in the axial direction of the bolt 8 but does not rotate around the axial line. The arm 84 extends from the valve presser bolt 8 in a direction orthogonal to the valve presser bolt 8.
[0015]
The on-off valve 90 is a plate-like valve having a curved surface along the inner peripheral surface of the valve chamber 5, and slides along a portion where the opening 41 a of the bypass passage 41 is located on the inner peripheral surface of the valve chamber 5. It is possible to move. In this example, the opening degree of the bypass passage opening 41a can be controlled from the fully open state to the fully closed state in conjunction with the movement of the valve retainer bolt 8 in the axial direction.
[0016]
A flow rate adjustment method of the flow rate adjustment valve 1 of this example configured as described above will be described. As shown in FIG. 2A, first, when the valve retainer bolt 8 is pushed down to its lowest end position, the valve body 7 is pressed against the valve seat 6 by the lower end face 8a to seal the opening 51. At this time, the on-off valve 90 connected to the valve retainer bolt 8 is also lowered along the circumferential surface of the valve chamber, and the bypass passage opening 41a is fully closed.
[0017]
Next, as shown in FIG. 2 (b), when the valve retainer bolt 8 is lifted by half of the total stroke amount from the lowest end position, the on-off valve 90 also rises along the peripheral surface of the valve chamber. Thus, the bypass opening 41a is in a half-open state. As a result, the valve chamber 5 communicates with the lower flow channel 4 via the bypass passage 41, and the internal pressure of the valve chamber 5 is reduced by an amount corresponding to the opening degree of the bypass passage opening 41a. As a result, the valve body 7 is pushed up from the valve seat 6 and fluid begins to flow at a predetermined flow rate. The fluid flow rate is controlled by the opening degree of the bypass passage opening 41a.
[0018]
Next, as shown in FIG. 2 (c), when the valve retainer bolt 8 is pulled up to its uppermost position, the on-off valve 90 is further moved in conjunction with this, and the bypass passage opening 41a is almost fully opened. Become. As a result, the valve body 7 further floats and the fluid begins to flow at the maximum flow rate.
[0019]
(Second embodiment)
FIGS. 3A and 3B are a schematic configuration diagram of a flow rate regulating valve according to a second embodiment to which the present invention is applied, and a partial cross-sectional view showing a bypass path opening / closing control unit thereof. Since the basic configuration of the flow rate adjusting valve 1A of this example is the same as that of the flow rate adjusting valve 1 of FIG. 1, the corresponding parts are denoted by the same reference numerals, and description thereof is omitted.
[0020]
As shown in these drawings, the opening / closing controller 9A of the flow rate adjusting valve 1A of this example includes an arm 84B and an opening / closing valve 90A. The arm 84B moves integrally with the valve presser bolt 8 in the axial direction, and is suspended from a connecting ring 840 attached to the valve presser bolt so as not to move around the axis. A valve piece 90A as an on-off valve is suspended from the lower end of the arm 84B. The valve piece 90A is composed of a cylindrical portion and a downward conical portion formed on the lower end surface thereof.
[0021]
The valve piece 90A having this shape is arranged coaxially with respect to the bypass passage 41A at a position immediately above it. By path path 41A extends vertically, upper half portion thereof has a larger diameter, just the cylindrical portion of the Benkoma 90A are sized slidable. In contrast, the lower half portion has a small diameter, and a conical inner peripheral surface complementary to the conical surface of the valve piece 90A is formed as a valve seat 411 between the large diameter portion and the small diameter portion. . Therefore, when lowering vertically Benkoma 90A to the valve seat, by path path 41A becomes fully closed, increasing the Benkoma 90A from this position, in accordance with the increase amount of the bypass passage 41A The opening increases and switches to the fully open state.
[0022]
In the flow regulating valve 1A configured as described above, when the valve retainer bolt 8 is pulled up, the valve piece 90A is raised in conjunction with it, so that the bypass passage 41A can be switched from the fully closed state to the fully open state. The stroke from the fully closed state to the fully open state of the bypass passage 41A can be adjusted by adjusting the angle of the conical apex 91A in the valve piece 90A.
[0023]
(Third embodiment)
In the first and second embodiments described above, the open / close control unit for opening and closing the bypass passage is not provided with an independent open / close valve drive source, and is operated in conjunction with the valve presser bolt 8. Yes. Alternatively, the on-off valve can be operated separately from the valve presser bolt by using an independent drive source.
[0024]
4 (a) and 4 (b) are a schematic configuration diagram showing a flow rate adjusting valve having such a configuration and a partial perspective view showing a bypass passage opening / closing control unit. Since the basic configuration of the flow rate adjusting valve 1B of this example is the same as that of the flow rate adjusting valves 1 and 1A of the first and second embodiments, the corresponding parts are denoted by the same reference numerals and the description thereof is omitted. .
[0025]
As shown in FIGS. 4 (a) and 4 (b), the opening / closing controller 9B of the bypass passage of the flow rate adjusting valve 1B of this example includes an opening / closing valve 90B and a rotating shaft for rotating the opening / closing valve 90B in the opening / closing direction. 91B and a drive motor 92B connected to the rotating shaft 91B. Rotary shaft 91B is supported freely rotatably at the outer peripheral wall of the valve chamber 5.
[0026]
The on-off valve 90B is a semicircular plate having a constant thickness, and when the horizontal posture shown in FIG. 4B is reached, the bypass passage 41B is fully closed. It becomes a vertical position rotated from the horizontal position in the direction of the arrow, the opening and closing valve 90B is fully retracted from the by-path passage 41B fit into the outer peripheral wall of the valve chamber 5, the bypass passage 41B is fully opened.
[0027]
In the flow rate adjusting valve 1B configured as described above, the valve retainer bolt 8 is pulled up to the uppermost position, and the opening degree of the on-off valve 90B is adjusted by the motor 92B, whereby the valve body 7 is adjusted by a predetermined amount to the valve seat 6. The fluid can flow at a desired flow rate.
[0028]
(Fourth embodiment)
Here, the bypass path may be opened and closed by rotating the on-off valve around a rotation axis parallel to the bypass path.
[0029]
FIGS. 5A and 5B are a schematic configuration diagram showing the flow rate adjusting valve having such a configuration, and a partial perspective view showing the bypass passage opening / closing control unit. In the flow rate adjusting valve 1C of this example, the rotation shaft 94C of the on-off valve 90C that is rotated by a motor (not shown) is disposed in parallel with the axis of the bypass passage 41C. Further, as shown in FIG. 5B, the on-off valve 90C has a shape in which a part of a disk having a certain thickness is cut out in a sector shape at a predetermined angle. By matching the notch 92C with the bypass path 41C, the bypass path can be fully opened. Further, by completely retracting the notch 92C from the bypass path 41C, the bypass path 41C is switched to a fully closed state.
[0030]
(Fifth embodiment)
Then, as the on-off valve, a disc, a plurality of holes are formed having different opening areas concentrically, by positioning the respective holes in the bypass passage, so as to switch the opening of the by-path passage It may be.
[0031]
FIG. 6 is a schematic configuration diagram showing the flow rate regulating valve having such a configuration and a partial perspective view showing an opening / closing control unit of the bypass passage. The opening / closing controller 9D of the flow control valve 1D of this example includes a disk-like opening / closing valve 90D and a motor (not shown) for rotating the same. The opening / closing valve 90D is formed with four holes 92D, 93D, 94D, and 95D concentrically, and the diameters of these holes increase in order from the hole 92D.
[0032]
By positioning the portion of the on-off valve 90D in which no hole is formed in the bypass passage 41D, the bypass passage 41D can be fully closed. Further, by positioning each of the holes 92D to 95D in the bypass path 41D, the bypass path 41D has an opening corresponding to each hole.
[0033]
(Other embodiments)
Each example the foregoing is directed to flow control valve of tap water can be utilized for the flow control valve of the present invention in order to adjust the flow fluid flow volume other than water is a matter of course.
[0034]
【The invention's effect】
As described above, the present invention is a flow control valve having a floating valve body, and is an open / close control that opens and closes a bypass passage that communicates a passage portion on the downstream side of the valve body and a space on the back side of the valve body. Department. By adjusting the bypass path to a desired opening by the opening / closing control unit, the fluid flow rate can be adjusted with high accuracy.
[0035]
In addition, if a configuration is employed in which the on-off valve for opening and closing the bypass path in the on-off control unit is interlocked with the valve body presser for pressing the floating valve body, an independent drive source for opening and closing the on-off valve is provided. Since it becomes unnecessary, the configuration of the on-off valve control unit can be simplified, and the manufacturing cost can be reduced.
[0036]
On the other hand, when a motor for driving the opening / closing valve of the opening / closing control unit is provided, the opening / closing control of the bypass path can be arbitrarily performed, so that the flow rate can be freely adjusted.
[Brief description of the drawings]
FIGS. 1A and 1B are a schematic configuration diagram of a flow regulating valve according to a first embodiment to which the present invention is applied and a partial perspective view of a bypass passage opening / closing control unit, respectively.
2 (a), (b) and (c) are explanatory views showing the operation of an opening / closing control unit in the flow rate adjusting valve shown in FIG. 1, respectively.
FIGS. 3A and 3B are a schematic configuration diagram of a flow regulating valve according to a second embodiment to which the present invention is applied, and a partial cross-sectional view of a bypass passage opening / closing control unit, respectively.
4A and 4B are a schematic configuration diagram of a flow rate adjusting valve according to a third embodiment to which the present invention is applied and a partial perspective view of an opening / closing control unit, respectively.
FIGS. 5A and 5B are a schematic configuration diagram of a flow regulating valve according to a fourth embodiment to which the present invention is applied, and a partial perspective view of a bypass passage opening / closing control unit, respectively.
FIGS. 6A and 6B are a schematic configuration diagram of a flow regulating valve according to a fifth embodiment to which the present invention is applied, and a partial perspective view of a bypass passage opening / closing control unit, respectively.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Flow control valve 2 Valve box 3 Upper flow path 4 Lower flow path 5 Valve chamber 6 Valve seat 7 Valve body 8 Valve presser bolt 9, 9A, 9B, 9C, 9D Bypass path opening / closing control part 41, 41A, 41B, 41C , 41D Bypass path 51 Circular opening 52 First cap 53 Screw hole 54 Cylindrical portion 55 Second cap 84 Arm 90a, 90B, 90C, 90D On-off valve 92B Motor

Claims (4)

A fluid passageway;
A floating valve body that is pushed up from the valve seat by the pressure of the fluid flowing through the fluid passage and switches from a closed state to an open state;
A valve presser for pressing the valve body against the valve seat ;
A valve box forming a moving space of the valve body ;
A bypass passage communicating between a space on the back side of the valve body in the moving space and a portion of the fluid passage on the downstream side of the valve box;
And opening control section for controlling the opening of the bypass passage, the possess,
The opening control unit
An on-off valve for opening and closing the bypass passage;
A flow rate adjusting valve comprising: a connection mechanism that transmits the movement of the valve presser as an opening / closing operation of the opening / closing valve. In claim 1,
The on-off valve is
When the valve presser moves to a pressing position that presses the valve body against the valve seat, the valve presser moves to a position for closing the bypass path in conjunction with the valve presser,
When the valve presser is separated from the pressing position, the valve presser is configured to move to a position that increases the opening of the bypass passage according to the movement amount of the valve presser from the pressing position in conjunction with the valve presser. flow control valve, characterized by that. In claim 2,
The flow control valve according to claim 1, wherein the connection mechanism is an arm having one end connected to the valve presser and the other end connected to the on-off valve. In any one of claims 1 to 3 ,
The valve body is a sphere,
The moving space is a cylindrical space in which the sphere can slide.
The valve seat is a conical inner peripheral surface formed at one end of the cylindrical space,
The flow rate adjusting valve according to claim 1, wherein the valve presser moves with a predetermined stroke in an axial direction of the cylindrical space in a space on the back side of the valve body in the cylindrical space .

Images