JP2000283111A - Supplying device for high pressure air - Google Patents

Abstract

PROBLEM TO BE SOLVED: To instantly generate high pressure air having few pressure fluctuation and high accuracy so as to use for pressurized high pressure without using a pressure control valve, and supply the air stably by arranging a plurality of air tanks and a plurality of pressure regulating valves in a secondary side air supplying path, and regulating pressure of air. SOLUTION: Pressurized air is supplied from a pressurized air supplying source 5 to a primary side cylinder 10 of a booster cylinder 9 through a primary side air supplying path 6 with a solenoid valve 7 and a throttle valve 8. A secondary side air supplying path 16 built in a check valve 15 for preventing reverse flow of air and which is divided from the primary side air supplying path is connected to a secondary side cylinder 11 of the booster cylinder 9. Furthermore, a pressure regulating path 17 having a plurality of air tanks is connected, and a pressurized port 19 is connected through a solenoid valve 18.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a "high-pressure air supply device", and more particularly, to a "high-pressure air supply device" capable of reducing fluctuations in air pressure of a high-pressure air supply source and instantaneously obtaining stable, high-precision high-pressure air. High-pressure air supply device ”.

[0002]

2. Description of the Related Art Conventionally, for example, there has been a pressure reducing valve as a pressure control valve for adjusting a pressure supplied from a pressurized air supply source. This pressure reducing valve is configured as shown in FIG.
This pressure reducing valve is used as a valve rod 1 for determining the flow rate of fluid from the primary side to the secondary side, and a spring 2 for holding the valve rod 1.
, A handle 3 for compressing the spring 2, and a diaphragm 4 for reducing fluctuations in the secondary side pressure consumption.

In this pressure reducing valve, when the adjusting screw is screwed by turning the handle 3, the spring 2 is compressed, and the valve rod 1 is pushed downward by the repulsive force. Then, the pressure reducing valve opens, and the air flowing in from the primary side (inlet side)
Flows out to the secondary side (exit side). The air pressure flowing out at this time depends on how much the spring 2 is compressed (the handle 3
How much you turned). That is,
If the amount of screwing in the adjusting screw is small, only low pressure will flow out, and if the amount of screwing in is large, high pressure will flow out.

By attaching the diaphragm 4, even if the pressure consumption on the secondary side fluctuates greatly, it is possible to prevent the pressure on the secondary side from becoming lower than the adjusted pressure. The diaphragm 4 is a film made of a soft synthetic rubber plate or the like. When the consumption of air on the secondary side increases, the pressure decreases.
Since the pressure acting on the spring becomes smaller, the repulsive force of the spring 2 becomes the same as the increase in the pressure, and the valve is opened by pushing down the stem 1 more. It compensates for the increased air flow and increased consumption, preventing the pressure from dropping.

Conversely, when the amount of air consumption decreases, the pressure acting on the diaphragm 4 increases, and the repulsive force of the spring 2 is reduced, so that the valve stem 1 returns upward to reduce the degree of opening of the valve. You. Therefore, the air flow rate was reduced, so that the pressure on the secondary side did not increase more than the initially adjusted pressure.

[0006]

However, when pressure is adjusted using a pressure control valve,
A pressure control valve that regulates a pressure of about 40 kgf / cm2 or more at high pressure is expensive, and because it has a built-in diaphragm, the diaphragm has large fluctuations due to high pressure, resulting in poor responsiveness. Accuracy of ± 0.1kgf / cm2 level cannot be ensured, and the shock pressure is received at the moment when the pressure is obtained. I had to put some time.

The present invention solves the above-mentioned problems and the like, and instantly produces high-precision high-pressure air with little pressure fluctuation without using a pressure control valve so that it can be used for high-pressure pressurization. The purpose of this is to develop equipment for supply.

[0008]

In order to achieve the above-mentioned object, the invention according to claim 1 provides a plurality of air tanks and a plurality of pressures in a secondary air supply passage of a high-pressure air supply device. A control valve is provided. In detail, a booster that has a built-in piston whose primary side is larger in area than the secondary, and increases the pressure of secondary air supplied from the secondary according to the area ratio of the piston; In a high-pressure air supply device including a primary air supply passage for supplying air to a primary side of the piston and a secondary air supply passage supplied from a secondary side of the piston of the pressure increasing means, The side air supply path is provided with means for adjusting the pressure of air with a plurality of air tanks and a plurality of pressure control valves.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a piping diagram of a high-pressure supply device according to an embodiment of the present invention. Pressurized air supply source 5
Supplies a pressurized air at a predetermined pressure, for example, 35 kgf / cm2, to a primary cylinder 10 of a pressure-intensifying cylinder 9 via a solenoid valve 7 and a throttle valve 8 through a primary air supply passage 6. The area of the primary side surface 13 of the piston 12 built in the pressure intensifying cylinder 9 is several times the area of the secondary side surface 14, and the pressure on the secondary side cylinder 11 side is increased by the area ratio. In this case, the pressure of the air on the secondary cylinder 11 side is 47 kgf / cm2. The secondary cylinder 11 of the pressure intensifying cylinder 9 is connected to a secondary air supply path 16 which is branched from the primary air supply path 6 and has a built-in check valve 15 for preventing backflow of air. A pressure adjusting path 17 having
Connected through.

From the pressure regulating passage 17, a primary tank 20 for maintaining a boosted pressure of 47 kgf / cm2,
A tertiary tank 22 that instantaneously pressurizes 2 kgf / cm2 by a% and a secondary tank 21 that instantaneously pressurizes a set pressure of 42 kgf / cm2 by (100-a)% are branched and connected. In the adjustment path 17, the solenoid valve 23 and the throttle valve 24,
25 are connected in series. An exhaust path 27 is connected to the primary cylinder 10 of the pressure-intensifying cylinder 9 via an electromagnetic valve 26. The pressure adjustment path 17
A pressure sensor 28 with a first output contact for detecting the pressure of the air in the next tank 20 and a pressure sensor 29 with a second output contact for detecting the pressure of the air in the secondary tank 21 and the tertiary tank 22 are provided. .

The first pressure sensor with output contact 28 is used as a contact for controlling the pressure-intensifying cylinder 9 in order to maintain the pressure of the primary tank 20 at 47 kgf / cm2. The pressure sensor 29 with the second output contact is used as a contact for controlling the solenoid valve 23 in order to maintain the pressure of the secondary tank 21 and the tertiary tank 22 at a set pressure of 42 kgf / cm2. According to this configuration, when the electromagnetic valve 19 is opened to pressurize the pressurizing body, first, the tertiary tank 2 is pressed.
A% of the set pressure is increased by the pressure of 2.
And pressurize the remaining (100-a)% of the set pressure. At this time, the pressure applied to the pressurizing body is such that the pressure in the secondary tank 21 and the pressure in the tertiary tank 22 are instantaneously synthesized. It can be pressurized instantly.

When the pressurizing operation is performed by the present apparatus, when the solenoid valve 18 is opened and the set pressure is applied to the pressurizing member, the pressure of the secondary tank 21 and the tertiary tank 22 is increased to the second output contact. The pressure drops below the set value of the pressure sensor 29, so the solenoid valve 2
The boosted pressure via 3 is replenished. When the pressure is replenished and the pressure in the secondary air supply passage 16 falls below the set value of the pressure sensor 28 with the first output contact, the pressure is supplied from the pressurized air supply source 5 through the solenoid valve 7 to increase the pressure. The cylinder 9 pressurizes. In this way, pressure adjustment is automatically repeated during the pressurizing operation, and pressure fluctuation due to impact pressure does not occur. Can be generated.

[0013]

As described above, according to the first aspect of the present invention,
The described invention provides a stable, high-speed, high-precision high pressure with little pressure fluctuation by providing multiple air tanks and multiple pressure control valves, which are inexpensive parts. This device enables high pressure supply.

[Brief description of the drawings]

FIG. 1 is a piping diagram of a high-pressure supply device according to an embodiment of the present invention.

FIG. 2 is a structural diagram of a pressure reducing valve which is a pressure control valve.

[Explanation of symbols]

1 Valve stem 2 Spring
3 Handle 4 Diaphragm 5 Compressed air supply source
6 Primary air supply path 7 Solenoid valve 8 Throttle valve
9 Intensifier cylinder 10 Primary cylinder 11 Secondary cylinder
12 Piston 13 Primary side of piston 14 Secondary side of piston
15 Check valve 16 Secondary air supply path 17 Pressure adjustment path
18 Solenoid valve 19 Pressurization port 20 Primary tank
21 Secondary tank 22 Tertiary tank 23 Solenoid valve
24 Throttle valve 25 Throttle valve 26 Solenoid valve
27 exhaust path 28 pressure sensor with output contact 29 pressure sensor with output contact

Claims (1)

[Claims] In order to generate high-pressure air, a piston whose primary side is larger in area than the secondary side is built in, and the pressure of the secondary side air supplied from the secondary side is controlled by the area ratio of the piston. A booster, a primary air supply passage for supplying air to a primary side of the piston of the booster, and a secondary air supply passage supplied from a secondary side of the piston of the booster. The high-pressure air supply device according to claim 1, further comprising means for adjusting the pressure of the air with a plurality of air tanks and a plurality of pressure control valves in the secondary air supply path.