JPS643919Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a drain discharge device that automatically discharges drain accumulated in a compressed air dehumidifier or the like.

When the atmosphere is compressed, the amount of saturated water changes, causing the water vapor contained in the air to condense. Furthermore, lubricating oil from the air compressor, dust contained in the air, rust from piping, etc. mix with the water and become drain. If such condensate is sent to various air-operated equipment, it may cause malfunction or failure of the equipment, so it is necessary to discharge the condensate from the bottom of areas where condensate tends to accumulate, such as air tanks, aftercoolers, dehumidifiers, or piping. There is.

Conventionally, as a device for discharging such drain, a drain discharging device as shown in FIG. 1, for example, has been used.

The drain flowing from the piping into the container 18 through the drain inlet 1 is separated from dust by a strainer 4 and flows to the bottom of the bowl 3. When the drain accumulates, the float 7 rises, and the pilot hole 8
The obturator piece 13 that had been blocking the pilot hole 8 also rises to open the pilot hole 8. When the pilot hole 8 opens,
Compressed air in the ball 3 enters the upper chamber 9a of the piston 9 and pushes the piston 9 down. When the piston 9 is pushed down, the main discharge valve 10 opens, and the drain in the ball 3 passes through the strainer 11 and is discharged from the discharge passage 12 into the atmosphere.

As the float 7 descends as the drain in the ball 3 decreases, the pilot hole 8 closes to the closure piece 13.
However, since compressed air remains in the upper chamber of the piston 9, the piston 9 remains in a depressed state and drain discharge continues. Meanwhile, the compressed air in the upper chamber 9a of the piston 9 is flowing out into the atmosphere little by little through the small hole 14, and when the upper chamber 9a reaches near atmospheric pressure, the compressed air acting on the lower chamber 9b of the piston causes the piston to 9 is pushed up and the main discharge valve 10 is closed.

In the above-mentioned conventional device, a strainer 4 is provided at the drain inlet 1 to separate the dust in order to prevent malfunctions caused by clogging of the pilot hole 8 and clogging of the main discharge valve 10 due to rubber contained in the drain. In order to prevent the pilot hole 8 of the automatic discharge mechanism 6 from becoming clogged, it is necessary to use one with a small opening, which results in poor ventilation. In such a structure, the main discharge valve 10 of the automatic discharge mechanism 6
When the drain inlet 1 is closed, the drain flowing in from the drain inlet 1 passes through the strainer 4 due to its own weight, but there is a problem that the drain accumulates in the strainer 4 and the drain discharge device no longer functions. Ta. That is, when the drain entering the drain discharge device flows through the drain inlet 1 and passes through the strainer 4, it is replaced with the air in the ball 3. When a film of water is attached to the mesh of the strainer 4, air and drainage are not exchanged at the strainer 4, and the drainage accumulates inside the strainer 4. As the mesh size of the strainer 4 becomes smaller, the water film becomes more difficult to break, and this problem becomes more likely to occur.

The present invention was developed in view of the above-mentioned conventional problems, and is a drain discharge system that improves air exchange and improves the passage of drain through the strainer by providing a bypass passage that communicates the inside and outside of the strainer. The aim is to provide equipment.

Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 2 shows an embodiment of the present invention, in which a main body 2 having a drain inlet 1 and a bowl 3 having a drain outlet 15 form a container 18. A strainer 4 is provided in the container 18 and is suspended from the main body 2 so as to cover the drain inlet 1. Reference numeral 16 denotes a bypass passage that communicates the inside and outside of the strainer 4, and is bored in the main body 2. 5 is a buttful suspended at the bottom of the strainer 4;
It has a disk shape with the outer circumferential direction inclined downward, and is configured so that the automatic discharge mechanism 6 connected to the drain outlet 10 is not covered with drain. 7 is a float, which operates a closing piece 13 that opens and closes the pilot hole 8. A piston 9 has a main discharge valve 10 at the bottom, and is supported so as to be able to slide vertically.
The lower chamber 9b of the piston 9 communicates with the inside of the container 18 via a strainer 11. 14
is a small hole provided in the piston 9, and the upper chamber 9a
and the discharge passage 12 are communicated with each other. and container 1
8 communicates with a discharge passage 12 via a strainer 11 and a main discharge valve 10. 17 is drain inlet 1
The lower end of the strainer 4 is a guide cylinder whose lower end opens at a position below the bypass passage, and is provided toward the bottom of the strainer 4.

The device of the present invention having the above configuration operates as follows.

Drain flowing in from the drain inlet 1 of the main body 2 passes through the strainer 4, flows along the baffle 5 and the ball 3, and accumulates at the bottom of the ball 3. When the drain passes through the strainer 4, the air inside the ball 3 moves into the strainer 4 through the bypass passage 16 provided in the main body 2, so the drain passes smoothly through the strainer 4 and quickly reaches the bottom of the ball 3. It accumulates in Alternatively, the drain flowing into the strainer 4 from the drain inlet 1 flows down along the guide cylinder 17 provided toward the bottom of the strainer 4, and therefore does not pass through the bypass passage 16. As a result, the bypass passage is not blocked by the drain, so that the air inside the ball 3 can reliably flow into the strainer 4. The drain accumulated at the bottom of the ball 3 pushes up the float 7, and the automatic discharge mechanism 6 is activated as in the conventional device.
is activated and discharged to the atmosphere via the main discharge valve 10.

3 and 4 show other embodiments of the present invention, in which FIG. 3 shows a bypass passage 16 provided in the upper part of the strainer 4, and FIG. A cylindrical frame body 19 is provided at the abutting portion, and a bypass passage is bored in the frame body 19, and these figures 3 and 4 also differ from the embodiment shown in figure 2. It has a similar effect.

As described above, according to the above embodiment, the main body 2 is provided with a bypass passage that connects the inside and outside of the strainer 4, so that the air in the ball 3 can enter the strainer 4 through the bypass passage 16, so that the water film formed on the mesh of the strainer 4 can be quickly broken, and the drain can smoothly pass through the strainer 4.
Drain does not accumulate inside the drain inlet 1, and the drain does not function as a drain discharge device. Furthermore, since a guide tube 17 is provided at the drain inlet 1, facing the bottom of the strainer 4 and opening at a lower end below the bypass passage, the drain that flows in from the drain inlet 1 falls along the guide tube 17 to the bottom of the strainer 4, and does not flow out through the bypass passage 16. This means that the bypass passage 16 is not blocked by the drain and the dirt contained in the drain, and the air in the bowl 3 can be reliably guided through the strainer 4.
It also has the effect of allowing water to flow inside.

In addition, since the drain quickly collects at the bottom of the ball 3, the float rises smoothly and the operation becomes stable. Furthermore, regardless of the amount of drain flowing into the strainer 4, the drain does not accumulate in the strainer 4, so there is an effect that it can be used as a drain discharge device with a larger capacity than conventional devices.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a conventional drain discharge device, and FIGS. 2 to 4 are sectional views showing embodiments of the present invention. 1...Drain inlet, 2...Main body, 3...Ball, 4...Strainer, 5...Bassful, 6...
Automatic discharge mechanism, 7...Float, 8...Pilot hole, 9...Piston, 9a...Piston upper chamber,
9b... Piston lower chamber, 10... Main discharge valve, 11
...Strainer, 12...Discharge passage, 13...Closer piece, 14...Small hole, 15...Discharge port, 16...
bypass passage, 17... guide cylinder, 18... container,
19...Frame body.

Claims (1)

[Scope of utility model registration request] In a container formed by a main body having a drain inlet and a bowl having a drain outlet, a strainer suspended from the main body so as to cover the drain inlet and an automatic discharge mechanism for opening and closing the drain outlet are provided. In the drain discharge device, a bypass passage is provided near the abutment portion between the main body and the strainer to communicate the inside and outside of the strainer, and the drain inlet faces the bottom of the strainer with a lower end positioned below the bypass passage. A drain discharge device characterized by being provided with an opening guide tube.