JPH05118496A - Drain discharge device - Google Patents

Abstract

PURPOSE:To provide a drain discharge device having the capability of eliminating the occurrence of drain stagnation due to a clogged filter. CONSTITUTION:A filter 24 is provided at the upper opening of a drain vessel 22, and drain incoming through a drain introduction port 23a or 23b on a cap 23 drops to the bottom section of the vessel 22 via the filter 24. The bottom section of the vessel 22 is fitted with a float valve mechanism 5. A float 12 constituting the mechanism 5 changes in level, according to the level of drain in the vessel 22, and when that level change becomes equal to or above the predetermined level, the drain is discharged from the vessel 22 to a drain pipe body 6. Also, a solenoid valve 25 is fitted to the side of the cap 23. Pressure release passages 23c and 23d for connecting a zone 22a separated from the drain introduction ports 23a and 23b with the filter 24, to an atmospheric pressure zone are opened and closed by energizing and deenergizing the solenoid valve 25.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a float valve mechanism attached to the bottom of a drain container, and the inlet of the drain container and the inside of the drain container are separated by a filter so that the drain water level accumulated in the drain container is adjusted. The present invention relates to a drain discharge device that opens and closes a drain discharge port by vertically moving a float.

[0002]

2. Description of the Related Art FIG. 2 shows a conventional float type drain discharge device which automatically discharges the drain removed from high pressure air supplied to pneumatic equipment every time a substantially constant amount of the drain is accumulated.

A cap 3 is attached to the upper opening of the drain container 2 in the guard cover 1, and the drain removed from the high pressure air is introduced into the drain container 2 through the inlet 3a of the cap 3. A filter 4 is interposed in the upper opening of the drain container 2,
The inside is partitioned from the inlet 3a by the filter 4.

A float valve mechanism 5 is attached to the bottom of the drain container 2. A drain pipe 6 that constitutes the float valve mechanism 5 is penetratingly attached to the bottom of the drain container 2, and a pilot cylinder 7 is fixed to the outer periphery of the inner end of the drain pipe 6. An elevating body 8 is slidably accommodated in the inner periphery of the inner end portion of the drainage pipe 6 and the inner periphery of the large diameter portion 7a of the pilot cylinder body 7, and the inside of the drainage pipe body 6 serving as a drain discharge port is raised and lowered. It is always occluded by the body 8. A compression spring 9 is interposed between the lifting body 8 and the pilot cylinder 7. Inside the large diameter portion 7a of the pilot cylinder 7 and the drain pipe 6
It communicates with the inside through an orifice 8a on the lifting body 8.

A cylindrical valve 10 is slidably accommodated in the upper end of the small diameter portion 7b of the pilot cylinder 7, and the small diameter portion 7b.
The orifice 11 in b is opened and closed by the tubular valve 10. A float 12 is arranged on the outer periphery of the pilot cylinder 7, and a lever 13 attached to the float 12 penetrates the small diameter portion 7b and is inserted into the cylindrical valve 10.

The float 12 is lifted by the drain accumulated in the drain container 2, and when the lifted position is less than a prescribed value, the orifice 11 is closed by the tubular valve 10. When the rising position of the float 12 exceeds the specified value, the orifice 11 opens and high-pressure air flows into the small diameter portion 7b.
The passage cross-sectional area of the orifice 8a is made smaller than the passage cross-sectional area of the orifice 11, and by this setting, the small diameter portion 7
The pressure inside b becomes high. The high pressure and the spring action of the compression spring 9 push down the lifting body 8 to release the blockage in the drain pipe body 6. Therefore, the drain in the drain container 2 is discharged into the drainage pipe 6 through the through hole 7c that is provided on the large diameter portion 7a of the pilot cylinder 7. When the drain in the drain container 2 is discharged, the elevating body 8 immediately closes the drain pipe body 6 and a large air leak does not occur.

A manual cock 14 is attached to the cap 3, which is for breaking and breaking when the drain stays in the drain pipe connected to the inlet 3a. Open the manual cock 14 and cap 3.
When the inside is opened to the atmosphere, the closed drain in the drain pipe flows into the drain container 2 by the high pressure air.

[0008]

The drain blockage occurs not only in the drain pipe but also in the drain container 2. That is, the filter 4 may be clogged with an oil film or a water film, and the drain flowing into the drain container 2 may not fall to the float valve mechanism 5. In the case of such a drain clogging, even if the pet cock 14 is opened, the clogging of the filter 4 cannot be broken and the drain clogging cannot be eliminated.

There is also one using an electric opening / closing valve instead of the float valve mechanism. If this electrical on-off valve is opened, the drain is forcibly discharged regardless of whether the drain is blocked. This opening / closing timing is performed using a timer. The setting of the opening / closing timing, that is, the setting of the drain discharge capacity is set in consideration of the drain generation amount, but in order to smoothly discharge the drain, the drain discharge capacity must be set to be large. With such a setting, even if there is no drain, the electrical opening / closing valve is opened, and the air discharge amount increases.

The present invention is directed to a float-type drain discharge device which is advantageous in terms of air waste inherent in a drain discharge device using an electric on-off valve, and can be used for drain blockage in a drain pipe or drain blockage in a drain container. It is an object of the present invention to provide a drain discharge device that can be broken.

[0011]

Therefore, according to the present invention,
The inside of the drain container partitioned from the drain introduction port by the filter was connected to the atmosphere region by the pressure release passage, and the on-off valve was interposed on the pressure release passage.

[0012]

[Function] The inside of the drain container partitioned from the drain introduction port by the filter communicates with the atmosphere through the pressure release passage when the opening / closing valve is opened, and the float valve mechanism side with the filter as a boundary has a lower pressure than the drain introduction port side. .. The pressure difference breaks down the clogging on the filter and eliminates both the drain clogging and the drain clogging in the drain pipe due to the clogging on the filter.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIG. A cap 23 is attached to an upper opening of the drain container 22 in the guard cover 21, and the cap 23 has a pair of drain introduction ports 23a and 2a.
3b is provided. Drain introduction port 23a, 23b
Are used according to the piping configuration, and either one is blindly plugged. The drain removed from the high-pressure air is introduced into the drain container 22 from one drain introduction port (23a or 23b).

A cylindrical filter 24 is interposed in the upper opening of the drain container 22, and the area 22a in the drain container 22 is introduced by the filter 24 into the inlets 23a, 23.
It is partitioned from b.

A float valve mechanism 5 is attached to the bottom of the drain container 22. Since the float valve mechanism 5 has the same configuration as the float valve mechanism of FIG. 2, the same members are designated by the same reference numerals and the description thereof will be omitted. Filter 24
Has a bottom, and the bottom 24a covers the entire upper surface of the float valve mechanism 5. Therefore, the filter 24
The drain that has passed through falls around the float valve mechanism 5.

The cap 23 has a pair of pressure release passages 23c,
23d is formed. The pressure release passage 23c is the area 22a.
To the side surface of the cap 23, and the pressure release passage 23d penetrates from the side surface to the upper surface of the cap 23. An electromagnetic opening / closing valve 25 is attached to the side surface of the cap 23. The electromagnetic opening / closing valve 25 is repeatedly excited and demagnetized at time intervals set by the timer. The valve body 25a always closes the pressure release passage 23d, and when the electromagnetic opening / closing valve 25 is excited, the pressure release passage 23d opens. That is, the solenoid on-off valve 2
By the excitation of 5, both pressure release passages 23c and 23d communicate with each other,
The area 22a communicates with the atmospheric pressure area.

When the filter 24 is clogged with an oil film, a water film, etc., the drain introduced from the drain introduction ports 23a and 23b cannot pass through the filter 24 and does not reach the float valve mechanism 5. When the filter 24 is clogged, if the region 22a is communicated with the atmospheric pressure by exciting the electromagnetic opening / closing valve 25, the region 22a will be drained into the drain introduction ports 23a, 2
The pressure becomes low with respect to the 3b side. Due to this differential pressure, the filter 24 is not clogged, and the drain introduction port 23
The drain that is blocked on the a and 23b side is the filter 2
4 and falls to the float valve mechanism 5 side.

Similarly, the drain retention blockage in the drain pipe is quickly eliminated by lowering the pressure in the region 22a by exciting the electromagnetic opening / closing valve 25. Since the drain discharge in the drain container 22 is performed by the discharge action of the float valve mechanism 5, the air is wasted as in a conventional forced drain discharge device in which an electric opening / closing valve is attached to the attachment position of the float valve mechanism. Does not occur.

Of course, the present invention is not limited to the above-mentioned embodiment, for example, a sensor for detecting the pressure in the area 22a is attached, and the electromagnetic on-off valve is demagnetized based on the detection information from this pressure sensor. You may do it.
A manual cock may be used instead of the electromagnetic opening / closing valve.

[0020]

As described above in detail, according to the present invention, the inside of the drain container partitioned from the drain introduction port by the filter is connected to the atmosphere region by the pressure release passage, and the on-off valve is provided on the pressure release passage. By opening the on-off valve, the inside of the drain container, which is separated from the drain inlet by the filter, communicates with the atmosphere through the pressure release passage, eliminating both drain clogging due to clogging on the filter and drain clogging in the drain piping. It has an excellent effect of being able to do.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an embodiment embodying the present invention.

FIG. 2 is a conventional vertical sectional view.

[Explanation of symbols]

5 ... Float valve mechanism, 22 ... Drain container, 22a ... Region, 23a, 23b ... Drain introduction port, 23c, 23d
... pressure release passage, 24 ... filter, 25 ... solenoid on-off valve.

Claims (1)

[Claims] 1. A drain container (22) with a float valve mechanism (5) attached to the bottom of the drain container (22).
A drain (23a, 23b) in the upper part of the container and the inside of the drain container (22) are partitioned by a filter (24), and the float (12) is moved up and down according to the water level of the drain accumulated in the drain container (22). In the drain discharge device which opens and closes the drain discharge port (6) by displacement, the drain introduction port (23a, 23b) by the filter (24)
An area (22) within the drain container (22) partitioned from
a) is connected to the atmospheric region by the pressure release passages (23c, 23d), and the on-off valve (2) is provided on the pressure release passages (23c, 23d).
5) A drain discharge device, characterized in that