JPS5936121B2 - inlet valve - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an inlet valve for obtaining a desired flow rate or pressure from a source of positive or negative pressure.

Although various inlet valves have been developed, they are often provided integrally with the device, and the valve itself cannot be taken out and adjusted independently. Further, since the opening degree of the orifice is controlled inside the device, it is inconvenient to handle. The purpose of the present invention is to produce pulp 1
To provide an inlet valve for positive pressure and negative pressure, which can be independently provided as a single component of an apparatus, and whose orifice opening degree can be controlled on the secondary pressure side.

Still another object of the present invention is to provide an inlet pulp for positive and negative pressures that has properties suitable for controlling coupled pressure.

In order to achieve the above object, the positive pressure inlet valve according to the present invention includes a main body pipe that can be attached to a positive pressure source, a vanoleb seat that has a hole for forming an orifice in the center and is fixed in the pipe, and the valve seat. Located on the positive pressure side of
a valve that forms a variable flow path depending on the positional relationship with the orifice forming hole; a valve operating shaft that supports the valve and extends toward the control space by loosely penetrating the orifice forming hole; Near the orifice forming hole in the space, the operating shaft is supported by a conical-top shaft hole so as to be tiltable as desired with respect to the center of the main body tube, and at least one hole is provided for communicating the positive pressure side and the control space side. an operation bearing board; and a conical spring provided between the operation shaft and the main body tube so as to bias the operation shaft toward the control space and return the shaft to a position parallel to the main body tube axis; It is configured to form any variable flow path by tilting the operating shaft on the control space side.

The inlet valve for negative pressure includes a main body pipe that can be attached to a negative pressure source, a valve seat that has a hole for forming an orifice in the center and is fixed in the pipe, and a valve seat located on the control space side of the valve seat. , a valve that forms a variable flow path depending on the positional relationship with the orifice forming hole, and a valve that supports the valve, loosely penetrates the orifice forming hole, and extends toward the negative pressure side, and the other end is connected to the control space side. An extended valve operating shaft and a shaft hole with a conical top near the orifice forming hole on the negative pressure source side support the operating shaft so that it can be tilted arbitrarily with respect to the center of the main body tube, and are controlled with the negative pressure side. The control device includes an operating bearing board having one or more holes communicating with the space, and a conical spring provided between the operating shaft and the main body tube so as to return the shaft to a position parallel to the main body tube axis. It is configured to form any variable flow path by tilting the operating shaft on the space side.

According to each of the above configurations, the object of the present invention can be completely achieved,
Many more applications can be expected.

The apparatus according to the present invention will be explained in more detail below with reference to the drawings and the like.

1 and 2 are views showing an embodiment of the positive pressure inlet valve according to the present invention, in which FIG. 1 shows the valve in a closed state, and FIG. 2 shows a state in which a flow path is formed. It is shown.

The left end of the main body tube 1 is provided with a screw 1a for coupling to a positive pressure source, and the right end is also provided with a screw for receiving the auxiliary tube 4. From the left side of this main body pipe 1, a seal ring 10, a valve seat 11. The operation bearings 12 are inserted in this order and fixed with the auxiliary tube 4. The valve seat 11 is shown enlarged in FIG. The hole Ila at the center of the valve seat 11 is a hole for forming an orifice, and has a diameter smaller than the diameter of the rear end of the valve 5, which will be described later, and sufficiently larger than the diameter of the operating shaft 6. FIG. 4 is an enlarged view of the operating bearing board. The central part of the operating bearing board is conical, and the hole 12b at the top serves as a bearing hole for the operating shaft 6. Moreover, this bearing plate 12 has many holes 12c.
is provided. This hole 12c is located in the valve seat 11.
The space formed between the bearing plate 12 and the bearing plate 12 communicates with the controlled space. The operating shaft 6 is tiltably supported by the conical top hole 12b, and has a valve 5 fixed to its tip. A locking nut 8 and an operating tip 9 are provided at the other end of the operating shaft 6''.The locking nut 8 and the auxiliary pipe 4
A conical spring 1 is applied between them, and the action of this spring T positions the shaft 6 at the center of the auxiliary pipe 4 and biases the valve 5 in a direction that brings it into close contact with the valve seat 11. When the operating tip 9 is moved from the center, an opening (variable orifice) is formed between the valve 5 and the valve seat as shown in FIG. As the amount of displacement of the tip of the tip 9 from the central axis increases, the orifice opening degree increases and the flow rate also increases. FIG. 5 is a graph explaining flow characteristics. FIG. 5 shows the flow rate characteristics when air under pressure of 20 mmHg is connected from a positive pressure source and flows into the atmosphere through a flow meter into the control space. The Y-axis is the flow rate 1/min, and the X-axis is the displacement amount x (Myn). FIG. 6 and section T are sectional views showing an embodiment of the inlet valve for negative pressure according to the present invention, with FIG. 6 showing the inlet valve in a closed state and FIG. 6 showing the inlet valve in an open state. In the figure, 101 is a main body tube, and a screw 101a for connecting to a negative pressure source is provided at the left end in the figure. Reference numerals 102 and 103 are o-rings used when connecting to a device.

Seal ring 110 and valve seat 11 from the control space side
1. Operating bearings 112 are arranged in sequence and fixed with an auxiliary tube 104. The valve seat 111 and the operating bearing 112 can have the same shape as shown in FIGS. 3 and 4 above. The operation shaft 106 is connected to an operation bearing 112 as in the case of the positive pressure inlet valve described above.
It is supported so that it can be tilted. A conical spring IOT is provided between the retaining nut 108 provided on the operating shaft extending toward the negative pressure source and the auxiliary pipe 104. An operating chip 9 is provided on the shaft extending toward the controlled space. When this operation chip 9 is operated, a flow path is formed as shown in FIG. T, and the same flow rate characteristics as shown in FIG. 5 are obtained.
Next, with reference to FIG. 8, an application example in which the above-described positive pressure and negative pressure inlet valves are applied to coupled pressure control will be briefly described.

A reference pressure is supplied to the upper cover 20 from a reference pressure source 24 through an upper screw hole 20a. The cover 20 and the body 21 are separated by a diaphragm 22.
A screw hole 21a at the lower end of the body 21 communicates with a controlled space 25, and the pressure in this space 25 is made equal to the reference pressure by coupled control of positive and negative pressures. body 2
1, the above-described positive pressure inlet valve 1 and negative pressure inlet valve 101 are inserted and fixed. Each inlet valve 1, 101 is connected to a positive pressure source 26 and a negative pressure source 27. A connecting lever 23 is provided at the center of the diaphragm 22, and its lower end is inserted between the operating tips 9 and 109. When a leak occurs from the controlled space and the pressure in that space drops, the center of the diaphragm 22 is pushed downward and the lever 23 lowers the operating tip 9. As a result, the positive pressure source is connected and the pressure in the space increases, and when the diaphragm 22 returns to its original position, the tip 9 also returns and the opening degree of the orifice of the positive pressure inlet becomes zero. When the reference pressure is lowered, diaphragm 2
2 moves upward, the operating tip of the negative pressure inlet is lifted, and the controlled space and the internal body space are connected to a negative pressure source. When the lowered reference pressure is reached, the diaphragm 22 returns to its initial position. The positive and negative inlet valves according to the present invention can match the characteristics of both valves, and the operating chip can be placed in the pressure space to be controlled, so that coupled pressure control can be easily performed as shown in Fig. 8. It can be realized.

Needless to say, it can also be used for non-coupled pressure control. According to the present invention, a wide range of applications can be expected with a simple configuration.

Further, since the inlet valves according to the present invention can be provided independently from the main body of the apparatus, it is possible to assemble, prepare, measure, etc. the pulp compacts independently, and it can be said that it is suitable for mass production.

[Brief explanation of the drawing]

1 and 2 are cross-sectional views showing an embodiment of the positive pressure inlet valve according to the present invention, in which FIG. 1 shows the state in which the orifice is closed, and FIG. 2 shows the state in which the orifice is open to form a flow path. It is shown in this state. FIG. 3 is an enlarged view of the valve seat used in the embodiment, and FIG. 4 is an enlarged view of the operating bearing board. FIG. 5 is a graph for explaining the flow characteristics of the inlet valve. Figures 6 and T are cross-sectional views showing an embodiment of the negative pressure inlet valve according to the present invention, in which Figure 6 shows the state in which the orifice is closed, and Figure T shows the state in which the orifice is open to form a flow path. It is shown in the condition. 8th
The figure is an explanatory diagram showing an example of application of a positive and negative pressure inlet valve. 1,101: Main body pipe, 2,3,102,103:
o-ring, 4,104: auxiliary pipe, 5,105: valve,
6,106: Operating shaft, T, lOl: Conical spring, 8,10
8: Lock nut, 9, 109: Operation chip, 10, 11
0: Seal ring 11, 111: Valve seat, 12,
112: Operation bearing, ゜20: Cover 1, 21: Body, 2
2: Diaphragm, 23: Connection lever, 24: Reference pressure,
25: controlled pressure space, 26: positive pressure source, 21: negative pressure source.

Claims (1)

[Scope of Claims] 1. A main body tube that can be attached to a positive pressure source, a valve seat that has a hole for forming an orifice in the center and is fixed within the tube, and a valve seat that is located on the positive pressure side of the valve seat and that is A valve that forms a variable flow path depending on the positional relationship with the orifice forming hole, a valve operating shaft that supports the valve and loosely passes through the orifice forming hole and extends toward the control space, and a control space. An operation having one or more holes in which the operating shaft is supported so as to be tiltable arbitrarily with respect to the center of the main body tube by a conical-top shaft hole near the orifice forming hole, and the positive pressure side and the control space side are communicated with each other. The control device includes a bearing disc, and a conical spring provided between the operating shaft and the main body tube so as to bias the operating shaft toward the control space and return the shaft to a position parallel to the main body tube axis. A positive pressure inlet valve configured to form any variable flow path by tilting the operating shaft on the space side. 2. A main body tube that can be attached to a negative pressure source, a valve seat that has a hole for forming an orifice in the center and is fixed within the tube, and a hole for forming the orifice that is located on the control space side of the valve seat. a valve that forms a variable flow path in a positional relationship with the valve; and a valve operating shaft that supports the valve, loosely passes through the orifice forming hole, and extends toward the negative pressure side, while the other end extends toward the control space side. and one or more parts that support the operating shaft in a conical-top shaft hole near the orifice forming hole on the negative pressure source side so as to be tiltable as desired with respect to the center of the main body tube, and communicate the negative pressure side with the control space. an operating bearing board having a hole; and a cone provided between the operating shaft and the main body tube so as to urge the operating shaft toward the negative pressure source and return the shaft to a position parallel to the main body tube axis. including a spring;
Negative pressure inlet valve configured to form any variable flow path by tilting the operating shaft on the control space side.