JPH11336918A - Control valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a control valve which can prevent the disorder of a circulating fluid. SOLUTION: A control valve 1 is composed of an actuator 3 for driving a valve body 2 and a block 5 on which the actuatotor 3 is fixed. The block 5 has a valve chamber 11 for storing the valve body 2, a suction pipe 12 for forming a flow in route 13 and a trough hole 15 opened on the bottom surface 14 and a valve seat constitution member 17 for forming the flow out route 16 is fixed in the through hole 15. The valve seat constitution member 17 has a length size reaching on the extension of the flow in route 13. A thin plate shape rectifying plate 26 extending in the longitudinal direction of the valve seat constitution member 17 is projected on the inner wall 25 of the valve seat constitution member 17 and the height size H of the rectifying plate 26 is set to 10% or more of the inner diameter size I of the valve seat opening sorrounded by the valve seat.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a control valve for controlling a flow rate of a fluid.

[0002]

2. Description of the Related Art Conventionally, when controlling the flow rate of air,
As shown in FIG. 9, a control valve 101 was used.

The control valve 101 comprises a valve body 104 forming a valve chamber 103 in which a valve body 102 is housed, and an actuator 105 which is housed in the valve body 104 and drives the valve body 102 up and down. ing. A suction pipe 106 protruding laterally is formed in the valve main body 104, and an inflow passage 107 communicating with the valve chamber 103 is formed by the suction pipe 106.

The bottom surface 111 of the valve body 104
Is formed with a through hole 112 that communicates with the valve chamber 103. In the through hole 112, an outflow passage 113 is formed, and a valve portion 114 at the distal end of the valve body 102 is detachably seated. A cylindrical valve seat component member 116 having an upper end 115 is fixedly fitted therein.

[0005] The control valve 101 is connected to the control object 12.
1 and the outflow passage 113 is aligned with the through hole 122 provided in the valve body 104.
Is fixed and used in a state in which it is in close contact with the periphery of the through hole 122. At this time, the actuator 105 provided on the upper part may interfere with the control target 121, and in this case, as shown in FIG. 10, the length dimension of the valve body 104 must be set long. .
Then, along with this, the distance between the valve portion 114 of the valve body 102 and the valve seat portion 115 where the valve portion 114 is separated and seated is increased.

In order to solve this, there are a method of changing the length of the valve body 102 of the actuator 105 and a method of changing the length of the valve seat member 116 forming the valve seat 115. As conceivable, when the length dimension of the valve body 102 of the actuator 105 is changed, it is necessary to change the design of the valve body 102 and the driving force of the actuator 105. Therefore, in order to prevent an increase in cost, the length dimension of the valve seat constituting member 116 had to be changed.

[0007]

However, in the control valve 101 in which the length of the valve body 104 is changed, the inflow path 107 and the outflow path 113 are set in the cross direction, and the outflow path Since the valve seat component member 113 forming the member 113 extends over the extension of the inflow passage 107, air introduced from the inflow passage 107 collides with the valve seat component member 116. Therefore, the valve chamber 103
As shown in FIG. 11, a control characteristic line 131 showing a relationship between a valve opening degree due to the vertical movement of the valve body 102 and an air flow rate of the control valve 101 as shown in FIG. However, it is disturbed when the valve opening is increased. As a result, the control characteristics of the control valve 101 deteriorate.

The present invention has been made in view of such conventional problems, and has as its object to provide a control valve capable of preventing disturbance of a flowing fluid.

[0009]

According to the present invention, there is provided a control valve, wherein an inflow passage and an outflow passage which communicate with a valve chamber formed in a valve body extend in a direction intersecting with each other. In, the outflow path is formed by a tubular member fixed to the valve body, the tubular member,
In the control valve reaching the extension of the inflow path, a thin plate-shaped straightening plate extending in the longitudinal direction of the tubular member is protruded from an inner wall surface of the tubular member.

That is, the fluid flowing into the valve chamber from the inflow path collides with the cylindrical member forming the outflow path, and the flow is disturbed. However, on the inner wall surface of the tubular member, a thin plate-shaped straightening plate extending in the longitudinal direction of the tubular member is provided so as to protrude therefrom, and the fluid flows out of the passage formed by the tubular member. As it flows out more, its flow is adjusted.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a control valve 1 according to the present embodiment.
An actuator 3 for controlling the amount of protrusion by driving the
The actuator 3 includes a block 5 as a valve body fixed via an O-ring 4.

The block 5 has a valve chamber 11 having an upper opening.
Are formed so that the valve body 2 protruding from the actuator 3 is inserted. A suction pipe 12 protruding laterally is provided below the block 5.
The suction pipe 12 forms an inflow passage 13 through which air flows into the valve chamber 11. Further, a through hole 15 communicating with the valve chamber 11 is formed in the bottom surface 14 of the block 5, and the through hole 15 has a valve seat as a cylindrical tubular member forming an outflow passage 16. The constituent member 17 is fixed via an O-ring 18.

The valve seat component member 17 is provided orthogonal to the suction pipe 12, and is connected to the suction pipe 1.
2 and the valve seat component 1
It is configured such that the direction of extension with the outflow channel 16 formed by 7 is orthogonal. The valve seat component 17
Is set so as to reach the moving area of the valve body 2 and has a length dimension that reaches the extension of the inflow path 13.

As shown in FIG. 2, the valve seat member 17 has a groove 22 extending along the circumferential direction of the outer peripheral surface 21.
Are formed in the lower portion, and the O-ring 18 is mounted in the groove 22. A valve seat 23 bulging inward from an edge is formed at an upper end of the valve seat component member 17, and a valve 24 formed at a lower end of the valve body 2 can be separated and seated. (See FIG. 1). As shown also in FIG. 3, on the inner wall surface 25 of the valve seat component 17, a thin straightening plate 26 extending in the length direction of the valve seat component 17 is provided.
Are protruded at four places at equal intervals.
6 is set to 10% or more of the inner diameter dimension I of the valve seat opening 27 surrounded by the valve seat 23 (height H of the current plate 26 / valve seat opening). 27 inner diameter dimension I
× 100 ≧ 10).

In this embodiment having the above-described configuration, when the valve body 2 is moved upward by the operation of the actuator 3 and air flows in from the inflow path 13 and outflows from the outflow path 16, The valve chamber 1 from the inflow passage 13
The air that has flowed into 1 collides with a valve seat component member 17 that forms the outflow passage 16, and its flow is disturbed. However, on the inner wall surface 25 of the valve seat component 17, a thin plate-shaped straightening plate 2 extending in the length direction of the valve seat component 17 is provided.
Are provided so as to protrude, and the turbulent air is caused to flow out through the outflow passage 16 formed by the valve seat component member 17, whereby the flow can be regulated. As described above, the flow of air flowing through the control valve 1 can be adjusted, so that control characteristics of the control valve 1 can be improved.

Further, since the valve seat constituting member 17 is formed of a synthetic resin, the rectifying plate 2 on the inner wall surface 25 is more easily compared to a case where the valve seat forming member 17 is formed of a metal, for example.
.. Can be easily formed. Thereby, cost reduction can be achieved.

FIG. 4 is a diagram obtained by an experiment using the control valve 1 according to the present embodiment. The flow rate of air flowing through the control valve 1 and the flow rate of air flowing through the control valve 1 are shown in FIG. A correlation line 31 with the generated sound pressure is shown, and a hunting limit line 32 is shown in which the air flowing through the control valve 1 is disturbed and the flow rate of the flowing air starts to hunt. As a result, the sound pressure is reduced to the magnitude at which the hunting limit line 32 is set, specifically, 85.
It was confirmed that the air flowing through the control valve 1 was disturbed when the pressure exceeded dBA.

FIG. 5 shows a sound pressure of a sound generated from air flowing through the control valve 1 and a rectifying plate 26 provided on the valve seat component member 17 and a hunting of a flow rate based on the sound pressure. FIG. 6 is a diagram showing the relationship between the presence and absence of the current plate, in which the height, the ratio of the height to the valve seat opening 27 of the valve seat component member 17, and the number of sheets are shown.
FIG. 6 is a diagram showing the relationship between the height, the length, and the sound pressure of the current plate 26. FIG.
6 is a diagram showing a relationship among the number of sheets, height, and the sound pressure. FIG. Accordingly, in the control valve 1 according to the present embodiment, a change in the sound pressure due to a difference in the length and the number of the straightening plates 26, that is, a change occurs in the presence or absence of hunting of the air flowing through the control valve 1. Turned out not to be.

FIG. 8 shows the height of the rectifying plate 26, which is correlated with the sound pressure from these results, that is, the height is the valve seat opening 27 in the valve seat component 17.
FIG. 4 is a diagram showing the relationship between the ratio of the air flow to the inner diameter dimension I and the presence or absence of hunting of the air flowing through the control valve 1. In the control valve 1 according to the present embodiment, Is the valve seat opening 2 in the valve seat component 17.
When the ratio of the diameter 7 to the inner diameter I exceeds 10%, it has been found that the hunting of the air flowing through the control valve 1 disappears and the rectifying effect of the air flowing through the control valve 1 becomes significant. .

In the present embodiment, the ratio of the height of the rectifying plate 26 of the valve seat component 17 to the inner diameter I of the valve seat component 17 is set so as to exceed 10%. Although the case has been described as an example, the present invention is not limited to this.
The height may be set to a value suitable for the height.

[0021]

As described above, in the control valve of the present invention, the inner wall surface of the cylindrical member forming the outflow passage is provided with:
A thin plate straightening plate extending in the length direction of the tubular member is provided so as to protrude therefrom, and when flowing in from an inflow path, the fluid in the valve chamber that collides with the tubular member and is disturbed in flow. Is made to flow out through the outflow channel formed by the cylindrical member, whereby the flow can be adjusted. Thus, the flow of the fluid flowing through the control valve of the present invention can be adjusted, so that the control characteristics of the control valve can be improved.

[0022]

[Brief description of the drawings]

FIG. 1 is a partial sectional view showing an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a valve seat component according to the embodiment.

FIG. 3 is a bottom view showing a valve seat constituent member in the embodiment.

FIG. 4 is a diagram showing a relationship between an air flow rate of a control valve and a sound pressure in the embodiment.

FIG. 5 is a view illustrating a sound pressure of a sound generated from air flowing through a control valve and a straightening plate of a valve seat constituent member according to the embodiment;
It is a figure which shows the relationship with the presence or absence of hunting of the flow rate based on the said sound pressure.

FIG. 6 is a diagram showing the relationship between the height, the length, and the sound pressure of the current plate of the valve seat constituent member in the same embodiment.

FIG. 7 is a diagram showing a relationship between the number of flow straightening plates of the valve seat constituent member, the height, and the sound pressure in the same embodiment.

FIG. 8 shows the ratio of the height of the straightening plate of the valve seat component to the inner diameter of the valve seat opening in the valve seat component, the presence or absence of hunting of air flowing through the control valve, and FIG.

FIG. 9 is a partial sectional view showing a conventional control valve.

FIG. 10 is a partial sectional view showing another conventional example.

FIG. 11 is a diagram showing control characteristics of the control valve of the conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Control valve 5 Block (valve main body) 11 Valve room 13 Inflow path 16 Outflow path 17 Valve seat constituent member (tubular member) 25 Inner wall surface 26 Rectifier plate

Claims (1)

[Claims] An inflow passage and an outflow passage communicating with a valve chamber formed in a valve body extend in a direction intersecting with each other, and the outflow passage is formed by a cylindrical member fixed to the valve body. And a control valve in which the tubular member reaches an extension of the inflow passage. A thin plate-shaped straightening plate extending in the longitudinal direction of the tubular member is provided on an inner wall surface of the tubular member. A control valve, characterized in that: