JPH01303378A - Flow rate adjustment valve - Google Patents

Abstract

PURPOSE:To obtain the title flow rate adjustment valve without mulfunction in a higher pressure of an inlet by accommodating a cylinder shaped movable valve having two through holes for controlling the flow rate at the inlet and escape port, in a housing having the inlet, escape port and outlet. CONSTITUTION:There is accommodated a cylinder shaped movable valve 21 in a housing 10 having an inlet 4, escape port 6 and outlet 5. There are provided through holes 24, 25 in compliance with the inlet 4, escape port 6. The larger the opening area of the inlet 4 is, the smaller the opening area of the escape port 6 is, and the smaller the opening area of the inlet 4 is, the larger the opening area of the escape port 6 is. Since the movable valve is formed into a cylinder shape, there is no variation in the opening area in a higher pressure of the inlet side, thereby eliminating the mulfunction.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a flow regulating valve used for measuring the flow characteristics of, for example, valves and nozzles used in gas appliances, or exhaust pipes of automobiles.

``Prior Art'' The flow rate characteristics of a device through which a fluid such as gas flows can be expressed as a flow rate-pressure characteristic as shown in FIG. 7C. This flow rate-pressure characteristic is determined by applying a fluid flow to the object to be measured, measuring the flow rate of this fluid and the pressure on the inlet side of the object to be measured, and plotting the change in pressure while gradually changing the flow rate.

As described above, 1: When measuring the flow rate characteristics of an object to be measured, it is necessary to vary the flow rate applied to the object with good linearity. Therefore, as a means for changing the flow rate with good linearity, the present applicant proposed a flow rate gi adjustment having a structure as shown in FIG. 4 in Utility Application No. 169979/1982.

This flow rate regulating valve has two throttles 1 and 2 as shown in Figure 6.
The apertures 1 and 2 are connected to the drive motor 3 (;
- The aperture t is driven in the opposite direction and the aperture t is changed in a complementary manner. In other words, when the aperture 1 is closed, the aperture 2 is opened, and when the aperture 1 is opened, the aperture 2 is closed.

The fluid supplied to the inlet 4 is divided into the outlet 5 and the relief port 6C, and by controlling the throttling amounts of the throttles 1 and 2 in a complementary manner, the dividing ratio of the fluid flowing to the outlet 5 and the relief port 6 is changed. , the flow rate of the fluid flowing out to the outlet 5 can be changed linearly with respect to the operation amount of the throttle 1.

The flow rate regulating valve shown in FIG. 4 is a vacant space in the housing 10]
1 is formed, and a first passage 12 and a second passage 13 communicating with the inlet 4 and the relief opening 6 are communicated with the empty space 1.1, and a third passage 14 communicating with the outlet 5 is formed. be done.

Variable throttles 1 and 2 are provided at the first passage 12 and at the boundary between the first passage 12 and the cavity 11. As shown in FIG.
It can be configured by a through hole IA and a movable valve 17 that mutually changes the opening area of the two people.

The movable valve 17 has an elliptical shape as shown in FIG.
5 (Therefore, it is pivoted at an eccentric position and is rotated by the motor 3. Therefore, the opening area of the through hole IA and the opening area of the two valves change mutually in a mutually complementary manner depending on the rotational position of the movable valve 17. In this example, a disk 16Y is attached to the shaft 5, a bottle 16A')' is planted on the disk 16, and the bottle 16A is engaged with the movable valve 17i, so that the movable valve 17 is connected to the shaft 15. What if it is configured to connect in the rotational direction? show.

A spring 18 is inserted between the movable valve 17 and the disc 16, and the movable valve 17 is brought into pressure contact with the forming surfaces of the through holes IA and 2A.
The movable valve 17 is brought into elastic pressure contact with the forming surfaces of the through holes IA and 2A against the pressure of the fluid applied from the inlet 4.

"Problems to be Solved by the Invention" According to Figure 4 (: Shown in Figure 2) Structure of the flow adjustment valve (2), when the pressure of the fluid applied from the inlet 4 increases when the special throttle 1 is throttled, the movable valve 17 has the disadvantage that it lifts up against the biasing force of the spring 18, causing the drawing to go out of order and causing a complete loss of control function.

Furthermore, since the apertures 1 and 2 are arranged side by side, the occupied area becomes large. Special C: When making something with a large flow increase, use through-hole IA
Since the cross-sectional area of 2A and 2A must be made large, there is a drawback that the shape becomes large.

A first object of the present invention is to provide a flow rate regulating valve in which the movable valve does not malfunction even if the pressure of the fluid applied from the inlet side is high.

A second object of the invention is to provide a flow rate regulating valve that occupies a small area.

``Means for Solving the Problems'' This invention includes a housing having a hollow space with a cylindrical cross-sectional shape, a cylindrical movable valve mounted rotatably within the hollow space of the housing, and a valve mounted outside the housing. A first passage and a second passage communicating with the surface of the movable valve are formed on the circumferential surface of the cylindrical movable valve, and when the movable valve rotates, the same areas of the first passage and the second passage are mutually complementary. A third passage is formed by communicating between the through hole arranged to change the direction of rotation, the cavity surrounded by the movable valve, and the outside of the housing, and the third passage is formed by driving the movable valve in forward and reverse rotation. A flow regulating valve is constructed with three passages (two drive motors that output fluid at a desired flow rate).

According to this invention-1, the movable valve is cylindrical, and a through hole is formed in the circumferential surface of the cylindrical movable valve for communicating the first passage and the second passage from the outside of the housing. The through hole faces the first passage and the second passage to form a diaphragm.

By rotating the movable valve, the opposing areas of the through hole and the first passage and the second passage change in a complementary manner, and the amount of throttling is controlled in a complementary manner.

Therefore, according to the configuration of this invention, the movable diaphragm is connected to the housing C.
I formed two! Since it is constituted by the J1 passage, the second passage, and the through hole formed in the cylindrical movable valve, even if the pressure of the fluid applied from the inlet side is high, there will be no accident in which the opening degree of the movable throttle goes out of order.

Therefore, it is possible to accurately measure objects to be measured that handle high-pressure fluids.

Furthermore, since the movable valve is cylindrical and has a structure in which two throttles are arranged on the same axis, there is an advantage that the area occupied is small.

"Example" FIG. 1 shows an embodiment of a flow rate regulating valve according to the present invention.

Figure (: 10 shown is the housing, 20 is this housing 1
2 shows a cavity with a cylindrical cross section formed at 0.

Vacant space 20≦: The cylindrical movable valve 21 has a bearing 22°23 (
:Therefore, it is rotatably supported. This cylindrical movable valve 21
have a cylindrical shape as shown in FIG.
Slit-shaped through holes 24 and 25 are formed on different circumferential surfaces. This example shows a vertically elongated case (two through holes 24 and 25 are formed).

The housing 10 is formed with a first passage 26 and a second passage 27 that communicate with the circumferential surface of the movable valve 21 from the outside. 1st
The passage 26 communicates with the inlet 4, and the second passage 27 communicates with the relief port 6.

A third passage 28 is formed in communication with the cavity 20 surrounded by the cylindrical movable valve 21, and this third passage 28 is used as the outlet 5.

The circumferential surface of the movable valve 21 (: the formed through holes 24 and 25 are configured such that the facing area of the first passage 26 and the second passage 27 changes as the movable valve 21 rotates.

Therefore, in this example, as shown in FIG.
Fixed valve 29.3 in the shape of a cylinder cut diagonally on the outer periphery of 1
Cover with 1v. The fixed valves 29 and 31 have grooves 2gA and 31AY parallel to the axis on their outer peripheral surfaces, and these grooves 29A and 31A
The projecting piece 32 pushed out by springs 32A and 33AC2
B and 33B are engaged to prevent the fixed valves 29 and 31 from rotating.

The upper end of the movable valve 21 is a closed surface, from which a rotating shaft 34 protrudes, and this rotating shaft 34 is connected to the drive motor 3;
The structure is such that the movable valve 21 is driven in forward and reverse rotation by the forward and reverse rotation active f2 of the drive motor 3, and the opening areas of the through holes 24 and 25 can be changed in a complementary manner.

"Effects of the Invention" α According to the configuration described above, the movable valve 21 and the fixed valve 29.
Since the valve 31 is not supported by a spring or the like, even if a large pressure fluid is applied to the inlet 4, the movable valve 21 and the fixed valve 2
9.31 will never move. Fluid pressure C: Therefore, an accident in which the throttle amount goes out of order does not occur, and a highly reliable flow can be provided by the regulating valve.

In addition, the cylindrical valve 21 (the aperture formed by the two formed through holes 24 and 25 and the fixed valves 29 and 31 is the cylindrical movable valve 2
], the advantage is that the occupied surface n1 can be made small even if the flow rate is large.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing an embodiment of this invention, the second factor is a perspective view for explaining the structure of a movable valve used in an embodiment of this invention, and Fig. 3 is a structure of a movable valve and a fixed valve. The fourth factor is a cross-sectional view to explain the conventional technique, FIG. FIG. 4 is a diagram for explaining the function of the flow rate regulating valve shown in FIG. 4, and FIG. 7 is a graph for explaining an example of the flow rate characteristics. 10: Housing, 20: Vacant room, 21: Movable valve, 24.
25: Through hole, 26: First passage, 27: Second passage, 28:
Third passage, 3: Drive motor. Patent Applicant Cosmo Keiki Co., Ltd. Attorney Fu Kusano Procedural Amendment (Voluntary) December 2, 1988 1. Indication of Case Patent Application No. 133709/1983 2. Title of Invention Flow Control Valve 3. Amendment Person doing the work Relationship to the case Patent applicant Cosmo Keiki Co., Ltd. 4, Agent Sagami Building, 2-21 Shinjuku 4-chome, Shinjuku-ku, Tokyo (Kame 03-350-6456) 5, +1
1i Correct Object Correct the detailed description column and drawings of the invention during the hot summer to read "Control the flow rate to improve responsiveness." (2) Change “change the flow rate with good linearity” to “
``Control the flow rate with responsiveness.'' (3) Lines 8 to 10 on page 3 of the statement “At exit 5...”
be able to. '' should be corrected to ``Since the change in impedance of the flow rate adjustment valve relative to the flow rate adjustment amount on the input side as seen from the outlet 5 can be made small, the flow rate adjustment range for control can be widened from small to large flow rates.'' . (4) Figure 1 of the drawings is corrected to the attached figure. that's all

Claims (1)

[Claims] (1) A: A housing having a cavity with a cylindrical cross-sectional shape; B: A cylindrical movable valve rotatably mounted in the cavity of the housing; C: Viewing the circumference of the movable valve from the outside of the housing. a first passage and a second passage that communicate with the surface; D. formed on the circumferential surface of the cylindrical movable valve, and as the movable valve rotates, the opposing areas of the first passage and the second passage change complementary to each other; E. a third passage communicating between the cavity surrounded by the movable valve and the outside of the housing; F. driving the movable valve in forward and reverse rotation; A flow rate regulating valve comprising: a drive motor that outputs fluid at a desired flow rate to the third passage;