JPS631606B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pressure regulator that reduces the pressure of compressed air supplied from a compressor to an inlet to a constant pressure and supplies it to an actuator from an outlet.

As shown in FIG.
In a system that supplies compressed air to a plurality of actuators 2 and 3 having different operating pressures,
Conventionally, an orifice 4 is provided in the middle of a pipe leading to the actuator 2, which has a low operating pressure, and a relief valve 5 is connected to the actuator 2.
compressed air at a predetermined pressure was supplied to the

However, in the above configuration, the compressed air produced by the compressor 1 is discharged into the atmosphere from the relief valve 5 for pressure control, and the disadvantage is that there is a lot of waste in the use of the compressed air.

An object of the present invention is to reduce the pressure of compressed air supplied from the compressor 1 to the actuator 2 shown in FIG. 1 to a constant pressure without releasing the compressed air into the atmosphere.

The configuration of the present invention for achieving the above object is as follows.

(a) a housing having an inlet connected to the compressor and an outlet connected to the actuator; (b) a first chamber communicating with the inlet; a second chamber located on one side and communicating with the atmosphere; a third chamber located on one side of the second chamber and communicating with the outlet; and a third chamber located on one side of the third chamber. The fourth part communicated with the atmosphere.
(c) providing a movable member having a passage partitioned into a chamber and passing through from one end to the other end and communicating with the third chamber; (c) reducing the pressure between the second chamber and the third chamber; (d) a spring is provided in the first chamber that applies a force in a direction opposite to the force applied to the movable member due to the difference; (e) providing a first valve in contact with one end of the movable member to close one end opening of the passage; (e) in the fourth chamber, the movable member moves from the specified position to the first chamber side; A second valve is provided which separates from the other end of the movable member by further displacement to open the other end of the passage.

With the above configuration, the movable member occupies a position corresponding to the pressure at the outlet, and when the pressure at the outlet is lower than a predetermined constant pressure, the movable member occupies a position corresponding to the pressure at the outlet.
The valve separates from one end of the movable member, and the compressed air in the first chamber passes through the passageway to the third chamber.
When the pressure at the outlet reaches the constant pressure, the first valve contacts one end of the movable member, and the compressed air in the first chamber increases. The pressure at the outlet is stopped from rising by preventing the compressed air from flowing into the third chamber through the passage, and the pressure at the outlet is controlled to the constant pressure without releasing the compressed air into the atmosphere.

When a seal failure of the first valve with respect to one end of the movable member occurs and the compressed air in the first chamber leaks into the third chamber through the passage, the pressure at the outlet increases and the Further displacement of the movable member toward the first chamber causes the second valve to separate from the other end of the movable member;
Since the compressed air in the third chamber is released into the atmosphere through the passage and the fourth chamber, the pressure at the outlet will not increase abnormally, and the actuator damage caused by this abnormal increase in pressure will not occur. This has the effect of preventing damage.

An embodiment of the present invention will be described below with reference to FIG.

In Figure 2, 1 is a compressor, 2
and 3 are actuators. The operating pressure of the actuator 2 is lower than that of the actuator 3, and the compressed air of the compressor 1 is supplied to the actuator 2 via the pressure regulator 10.

The housing 11 of the pressure regulator 10 combines parts 11a, 11b, 11c and 11d and has an inlet 12 connected to the compressor 1 and an outlet 13 connected to the actuator 2.
The movable member 14 in the housing 11 is a pipe 14
a and 14b, retainers 14c and 14d, and three diaphragms 14e, 14f, and 14g, and the retainers 14c and 14d are connected to the pipe 14a.
and 14b are interconnected, and the inner peripheral portion of the diaphragm 14e is fixed to the pipes 14a and 14b. Diaphragm 14f and 14
The inner periphery of g is directly fixed to the outer periphery of the pipes 14a and 14b.

The outer periphery of the diaphragm 14e is the housing 11
The outer periphery of the diaphragm 14f is fixed by parts 11a and 11b of the housing 11.
1a and a retainer 15 coupled thereto, and the outer periphery of the diaphragm 14g is fixed by a portion 11b of the housing 11 and a retainer 16 coupled thereto. Thus, inside the housing 11 is a first chamber 17 communicating with the inlet 12.
a second chamber 19 communicating with the atmosphere through the hole 18 in the housing 11; a third chamber 20 communicating with the outlet 13; and a fourth chamber 22 communicating with the atmosphere through the hole 21 in the housing 11. It is divided into.

The diaphragms 14f and 14g simply function as sealing members, and the movable member 14
Due to the pressure difference between the second chamber 19 and the third chamber 20, a downward force is applied. In other words, the movable member 14 is subjected to a downward force proportional to the pressure at the outlet 13.
The spring 23 in the second chamber 19 is connected to the movable member 14
Force upward. Thus, the movable member 14 is displaced to a position where the downward force applied by the pressure of the outlet 13 and the force of the spring 23 are balanced, and is displaced downward as the pressure of the outlet 13 increases.

A first valve 25 biased upward by a weak spring 24 is installed in the first chamber 17, and a second valve 25 biased downward by a weak spring 26 is installed in the fourth chamber 22. A valve 27 is installed. The illustrated position of the movable member 14 is the position when the compressor 1 is stopped, and the first valve 25
comes into contact with a stopper portion 28 provided on the inner wall of the housing 11 and separates from the lower end of the movable member 14,
The second valve 27 is in contact with the upper end of the movable member 14 . Therefore, when the compressor 1 starts operating and starts pumping air to the inlet 12 in the state shown in FIG. It enters the passage 29 from the lower end opening of the passage 29 formed by the retainers 14c and 14d, flows into the third chamber 20 through the hole 30 of the pipe 14b, and is sent to the actuator 2 from the outlet 13. As a result, the pressure at the outlet 13 increases, and as the pressure increases, the movable member 14 is displaced downward, and when the pressure at the outlet 13 reaches a predetermined constant pressure, the movable member 14 occupies the specified position. , the lower end of the movable member 14 is connected to the first valve 2
5, the lower end opening of the passage 29 is closed by the valve 25, the flow of compressed air from the first chamber 17 into the passage 29 is blocked, and the rise in pressure at the outlet 13 is stopped. When the pressure at the outlet 13 decreases below a certain pressure due to the operation of the actuator 2, the movable member 14 is displaced upward from the specified position, and the lower end of the movable member 14 separates from the valve 25. Pressure increases.

When a seal failure occurs between the valve 25 and the lower end of the movable member 14 in a state where the lower end of the movable member 14 is in contact with the first valve 25, the first
The compressed air in the chamber 17 flows into the passage 29, and the pressure at the outlet 13 rises above a certain pressure. Due to this pressure increase, the movable member 14 is further displaced downward from the specified position. When the movable member 14 is slightly displaced downward from the specified position, the second valve 27 comes into contact with a stopper portion 31 provided on the retainer 16 and separates from the upper end of the movable member 14 . This allows the compressed air in the third chamber 20 to flow through the hole 30, the passage 29, and the fourth chamber 20.
is discharged into the atmosphere through the chamber 22 and the hole 21, thereby preventing the pressure at the outlet 13 from increasing abnormally.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the prior art, and FIG. 2 is a sectional view showing an embodiment of the present invention. 11...housing, 12...inlet, 13...
Outlet, 14...Movable member, 17...First chamber, 1
9... second chamber, 20... third chamber, 22... fourth chamber, 25... first valve, 27... second valve.

Claims (1)

[Claims] 1 a housing having an inlet connected to a compressor and an outlet connected to an actuator;
a first chamber disposed within the housing and communicating with the inlet; a second chamber located on one side of the first chamber and communicating with the atmosphere;
A third chamber located on one side of the second chamber and communicating with the outlet, and a fourth chamber located on one side of the third chamber and communicating with the atmosphere, and one end of the third chamber is divided into a movable member having a passageway penetrating from one end to the other end and communicating with the third chamber; a spring that applies a force to the movable member; and a spring that is disposed in the first chamber and that contacts one end of the movable member and contacts one end of the passage when the movable member is displaced toward the first chamber by a predetermined position or more. A first valve that closes an opening is disposed in the fourth chamber, and when the movable member is further displaced from the specified position toward the first chamber, the movable member is separated from the other end of the movable member and the movable member is disposed in the fourth chamber. a second valve that opens the other end of the passage.