JPH10176700A - Recovery device for compressed air - Google Patents

Abstract

PROBLEM TO BE SOLVED: To recover air exhausted from pneumatic equipment or the like without exhausting it to the atmosphere so as to prevent any energy loss of a compressed air source by perpendicularly connecting a suction pipe connected to an air exhaust port in the pneumatic equipment to a narrow portion of a venturi pipe connected to the compressed air source. SOLUTION: A feed main pipe 9 connected to a compressed air source 8 is connected to a feed pipe 3 of a solenoid selector valve 2. A suction pipe 11 connected to an exhaust pipe 1 of the solenoid selector valve 2 is perpendicularly connected to a narrow portion 10a of a venturi tube 10. When compressed air of high pressure flows in the feed main pipe 9, a pressure at an opening of the narrow portion 10a becomes negative, so that the air exhausted from the exhaust pipe 7 is mixed with the air flowing inside the feed main pipe 9, and then, is recovered. The air exhausted from an air cylinder 1 can be prevented from being exhausted in vain, so that an energy loss of the compressed air source 8 can be prevented. The air exhausted form the exhaust pipe 7 and temporarily reserved in a reservoir tank 12 may be sucked to the feed main pipe 9 to be thus recovered.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for recovering and reusing compressed air discharged from a pneumatic device such as an air cylinder.

[0002]

2. Description of the Related Art FIG. 2 shows a backward-acting air cylinder (1),
An electromagnetic switching valve (2) for controlling the supply and discharge of compressed air thereto, and the electromagnetic switching valve (2) is connected via an air supply pipe (3) to
It is connected to a compressed air source (not shown).

When the electromagnetic switching valve (2) is operated, air is generated.
The air is supplied to the left air chamber of the air cylinder (1) from the air supply / exhaust pipe (4) on the left side in the figure, the inner piston is pressed to the right, and the piston rod (5) is protruded. On this occasion,
The air in the air chamber on the right side of the air cylinder (1) flows out to the right supply / exhaust pipe (6), and is exhausted to the outside through the exhaust pipe (7) of the electromagnetic switching valve (2).

When the electromagnetic switching valve (2) is switched, air is supplied from the right supply / exhaust pipe (6) into the air chamber on the right side of the air cylinder (1), and the piston in the chamber moves to the left. By being pressed, the piston rod (5) contracts.

At this time, the air in the air chamber on the left side of the air cylinder (1) flows out to the intake and exhaust pipe (4) on the left side and, similarly to the above, from the exhaust pipe (7) of the electromagnetic switching valve (2). It is discharged outside.

[0006]

In the backward-acting air cylinder (1) as described above, air is discharged from the exhaust pipe (7) of the electromagnetic switching valve (2) every time the piston rod (5) is moved forward and backward. )
Since the air is exhausted to the atmosphere, the air of the compressed air source is wasted, and energy is lost.

Further, since the air is exhausted vigorously, the noise is also large. Further, a part of the lubricating oil injected into the air cylinder (1) is converted into mist and released into the atmosphere, thereby deteriorating the working environment.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and prevents waste of air from a compressed air source by recovering air discharged from an air cylinder or the like without discharging the air to the atmosphere. It is another object of the present invention to provide a compressed air recovery device capable of suppressing generation of noise and emission of mist.

[0009]

According to the present invention, an object of the present invention is to provide a suction pipe connected to an air outlet of a pneumatic device in a narrowed portion of a Venturi pipe connected to a source of compressed air.
The problem is solved by connecting them orthogonally.

[0010]

FIG. 1 shows an embodiment of the present invention. The same members as those in the conventional example are denoted by the same reference numerals, and detailed description thereof will be omitted. The air supply pipe (3) of the electromagnetic switching valve (2) is connected to a main air supply pipe (9) connected to a compressed air source (8) such as a compressor or an air tank.

In the middle of the air supply main pipe (9), a venturi pipe (1)
0) is provided, and the squeezed portion (10a) has an electromagnetic switching valve (2)
The suction pipe (11) connected to the exhaust pipe (7) is orthogonally connected.

In the apparatus of the above embodiment, the air supply mains (9)
Then, when high-pressure compressed air from the compressed air source (8) flows, the opening of the squeezed portion (10a) in the venturi tube (10) becomes negative pressure, and the exhaust of the electromagnetic switching valve (2) is performed. The air discharged from the pipe (7) is sucked through the suction pipe (11), and is collected by being combined with the air flowing through the air supply main pipe (9).

Therefore, as in the prior art, the air cylinder (1)
The air exhausted each time is operated is not wastefully released into the atmosphere, and energy loss of the compressed air source (8) can be prevented.

The air discharged from the exhaust pipe (7) is
The storage tank (12) may be temporarily stored in an imaginary line, and the air in the storage tank (12) may be sucked into the air supply main pipe (9) and collected.

According to the present invention, in addition to the air discharged from the air cylinder (1), the air discharged by a cyclone type separation device utilizing compressed air or the like can be collected and reused.

[0016]

According to the present invention, air discharged from a pneumatic device or the like can be recovered without being released to the atmosphere.
Energy loss of the compressed air source can be prevented.

Further, generation of unpleasant noise can be prevented. Further, since mist such as lubricating oil mixed into the air is not released into the atmosphere, there is no possibility of deteriorating the working environment.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view showing an embodiment of the present invention.

FIG. 2 is a front view of an air cylinder to which the present invention is applied.

[Explanation of symbols]

 (1) Air cylinder (pneumatic equipment) (2) Solenoid switching valve (3) Supply pipe (4) (6) Supply / exhaust pipe (5) Piston rod (7) Exhaust pipe (8) Compressed air source (9) Supply Main pipe (10) Venturi pipe (10a) Narrowing section (11) Suction pipe (12) Storage tank

Claims (1)

[Claims] 1. A compressed air recovery apparatus, wherein a suction pipe connected to an air discharge port of a pneumatic device is orthogonally connected to a narrowed portion of a Venturi pipe connected to a compressed air source.