JPH0618572Y2 - Vehicle compressed air purification device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a vehicle compressed air purification device for removing oil and moisture in compressed air. More specifically, it relates to a device for purifying compressed air used in a brake system of a vehicle in which purging air cannot be taken out from an air tank.

[Prior Art] Conventionally, as a purification device of this type, a compressed gas drying device for removing oil and moisture in compressed air in a single container is disclosed in, for example, Japanese Patent Publication No. 45-30759.

This drying device has an oil filter, a desiccant storage chamber, and a purge chamber in a single container, and an exhaust valve at the bottom of the container. The oil and dust contained in the compressed air from the compressor are separated by the oil filter in the container and collected in the hollow chamber below the container. The compressed air containing oil and dust enters the desiccant storage chamber, is dehumidified by the desiccant, and is stored in the air tank through the purge chamber and the check valve outside the container.

When the pressure in the air tank reaches the specified pressure, the pressure regulator operates to unload the compressor and open the exhaust valve. When the exhaust valve is opened, the compressed air in the purge chamber is released into the atmosphere through the desiccant storage chamber. At this time, the water content adhering to the desiccant, the oil content adhering to the oil filter, and the oil content accumulating in the hollow chamber at the bottom of the container are discharged outside the container, and the drying device is regenerated.

The oil in compressed air is generated by leaking lubricating oil from the piston of the compressor.When high-grade oil containing various additives is used, if oil mist, water vapor and dust are mixed in the air, the additive will be added. Sometimes becomes a surfactant and these are emulsified to become a viscous body.

This viscous substance cannot be completely separated from the compressed air by the oil filter of the conventional drying device, and easily adheres to the desiccant. Once this viscous substance adheres to the desiccant, it is difficult to regenerate the desiccant with purge air, and as a result, the dehumidifying function of the desiccant is deteriorated.

In order to solve this point, a compressed air drying device in which a first container that constitutes an oil separator and a second container that constitutes an air dryer are formed symmetrically and integrally and can be placed horizontally is disclosed. (Actual development 61-64324).

In this device, the oil separator forms a twisted and bent path by a large number of partition plates, and the droplets adhering to the large number of partition plates are grown to drain and removed from the discharge valve.

[Problems to be Solved by the Invention] However, the oil separator disclosed in Japanese Utility Model Laid-Open No. 61-64324 has a large number of partition plates, has a complicated structure, and is difficult to drain from the drain valve because it is placed horizontally. Moreover, there is a drawback that inspection and maintenance inside the oil separator is extremely difficult.

An object of the present invention is to provide a vehicle compressed air purifying apparatus that enhances the oil separation function in compressed air and does not deteriorate the desiccant dehumidifying function.

Another object of the present invention is to provide a device for purifying compressed air for a vehicle, which can easily remove oil components in compressed air with a simple structure and can easily inspect and maintain the inside of an oil separator.

[Means for Solving the Problems] The structure of the present invention will be described with reference to FIGS. 1 to 3 corresponding to the embodiment.

The present invention relates to an air dryer 11 for accommodating a desiccant 48 and having an exhaust valve 34 attached to a lower portion thereof for dehumidifying compressed air from the compressor 10 by the desiccant 48, and the air dryer 1.
1. An air tank 15 for storing dehumidified compressed air from No. 1 via a check valve 14 and a pressure regulator 16 for maintaining the pressure of the air tank 15 at a specified pressure, and an exhaust valve when the pressure regulator 16 operates. It is an improvement of a vehicle compressed air purification device configured to open 34 to regenerate the desiccant 48.

The characteristic configuration is that an oil separator 12 is provided between the compressor 10 and the air dryer 11, and the oil separator 12 has an inlet 23 communicating with the compressor 10.
And an outlet 24 communicating with the air dryer 11 and an inlet 23
A single oil separation plate 27 vertically installed in the flow path of the compressed air between the outlet 24 and the outlet 24 so as to block the flow of the compressed air, and an oil sump chamber 12a provided below the oil separation plate 27. And an oil discharge valve 28 which is opened when the pressure regulator 16 is operated to discharge the oil accumulated in the oil sump chamber 12a.

[Operation] Even if the air pressure-fed from the compressor 10 contains a viscous substance produced by emulsifying an oil component, the oil component composed of this viscous substance is fed to the oil separator 1 before entering the air dryer 11.
It adheres to the second oil separation plate 27, flows down, and drops in the oil sump chamber 12a. This oil content is discharged from an oil discharge valve 28 that opens when the compression regulator 16 operates. Since the compressed air from which the oil content has been removed by the oil separation plate 27 is supplied under the oil separation plate 27 to the air dryer 11, the oil content does not adhere to the desiccant 48 of the air dryer 11.

[Embodiment] Next, an embodiment of the present invention will be described in detail with reference to the drawings.

As shown in FIG. 1, an oil separator 12 is provided between the compressor 10 and the air dryer 11. The air dryer 11 is connected to the air tank 15 via the check valve 14. The air tank 15 is maintained at a specified pressure by the pressure regulator 16. A brake chamber 20 is connected to the air tank 15 via an air reservoir 18 and a brake valve 19.

As shown in detail in FIG. 2, the oil separator 12 is formed by sealing a cylindrical housing 21 with an upper plate 22. An inlet 23 and an outlet 24 for compressed air are provided at the top of the housing 21. The inlet 23 communicates with the compressor 10 via a pipe 25, and the outlet 24 communicates with the air dryer 11 via a pipe 26. An oil separating plate 27 is provided in close contact with the inner surface of the upper plate 22 and the inner surface of the housing 21 so as to partition the inlet 23 and the outlet 24. An oil drain valve 28 is attached to the lower portion of the housing 21. The oil drain valve 28 is provided with an inlet 29 for opening / closing control air, a valve body 30, and a return spring 31. The oil separating plate 27 is arranged perpendicularly to the center line of the inlet 23, and its lower end extends right above the oil drain valve 28. Below the oil separating plate 27 is an oil sump chamber 12a.
Is provided, and the oil sump chamber 12 a communicates with the outside of the housing 21 via the oil discharge valve 28.

As shown in detail in FIG. 3, the air dryer 11 is configured by integrally connecting a cylindrical upper housing 32 and a cylindrical lower housing 33, and an exhaust valve 34 is attached to the lower portion of the housing 33. The exhaust valve 34 has an opening / closing control air inlet 35, a valve element 36, and a return spring 3
7 is provided. The upper housing 32 forms a purge chamber 38 and is provided with a compressed air outlet 39 on its side. A side of the lower housing 33 is provided with a compressed air inlet 40,
Inside thereof, a cylindrical wall 41 is arranged concentrically with the housing 33.

Between the cylindrical wall 41 below the inlet 40 and the housing 33, an auxiliary oil separator 42 filled with a wire mesh is arranged. An oil filter 43 made of paper, a perforated plate 44, a desiccant storage chamber 45, and a perforated plate 46 are provided in the cylindrical wall 41. A desiccant 48 is filled in the desiccant storage chamber 45.
A pressing spring 49 minimizes the vibration and friction of the desiccant particles in the desiccant storage chamber 45. Housings 32 and 3
A check valve 50 is provided between the three.

Returning to FIG. 1, one end of the pipe line 52 is connected to the air introduction port 29 for controlling the opening and closing of the oil discharge valve 28 and the air introduction port 35 of the exhaust valve 34, and the other end of the pipe line 52 is connected to the pressure regulator 16. Connected to. Further, the compressor 10 and the pressure regulator 16 are connected by a pipe line 53.

In the purifying apparatus having such a configuration, the compressed air of the compressor 10 is supplied to the inlet 23 of the oil separator 12 through the pipe line 25 as shown by the solid arrow. Entrance 23
The compressed air supplied to the oil strikes the oil separation plate 27. Here, when the compressed air contains a viscous body generated by emulsifying oil, the viscous body adheres to the oil separation plate 27, flows down, and drops into the oil sump chamber 12a.

The compressed air from which the viscous body has been removed passes under the oil separation plate 27 and is discharged from the outlet 24. The compressed air discharged from the outlet 24 passes through the pipe line 26 and enters the inlet 4 of the air dryer 11.
Supplied to zero. The compressed air supplied to the inlet 40 passes through the auxiliary oil separator 42 to reach the lower hollow chamber 33a, and further passes through the oil filter 43 in the cylindrical wall 41 to enter the desiccant storage chamber 45. The coarse dust, the remaining viscous body, and the water droplets are captured by the auxiliary oil separator 42 and collected in the lower hollow chamber 33a. The auxiliary oil separator 43 has excess oil mist.

The compressed air that has entered the desiccant storage chamber 45 is dehumidified by the desiccant 48, enters the purge chamber 38 through the check valve 50, and reaches the outlet 39. The clean compressed air that has reached the outlet 39 is stored in the air tank 15 via the check valve 14.

When the pressure in the air tank 15 reaches the specified pressure, the pressure regulator 16 is activated to cause the unload signal air to unload the compressor 10 through the line 53 as shown by the broken line. The delivery of the compressed air to the pipe 25 is stopped, and at the same time, the unload signal air flows through the pipe 52 into the air introduction ports 29 and 35 of the oil discharge valve 28 and the exhaust valve 34, respectively. As a result, the valve bodies 30 and 36 are lowered against the elastic force of the return springs 31 and 37, and the oil discharge valve 28 and the exhaust valve 34 are opened. When the oil drain valve 28 opens, the oil sump chamber 12
The viscous body accumulated in a is rapidly released to the atmosphere. Further, when the exhaust valve 34 is opened, first, the compressed air in the desiccant storage chamber 45 is rapidly released to the atmosphere, and at that time, water droplets between the desiccant and the oil filter 43 and coarse dust accumulated in the lower hollow chamber 33a. Etc. are discharged to the outside. Next, the desiccant storage chamber 45
Rapidly depressurizes, and the dry compressed air in the purge chamber 38 passes through the orifice 51 to reach the desiccant storage chamber 45, where it expands and removes the moisture absorbed in the desiccant 48, gradually becoming the atmosphere. Is discharged.

When the pressure in the air tank 15 becomes equal to or lower than the specified pressure, the pressure adjuster 16 returns. The unload signal air to the pipelines 52 and 53 is no longer sent out, and the oil drain valve 28 and the exhaust valve 3
4 is closed, and compressed air starts to be sent to the line 25 again.

FIG. 4 shows another embodiment of the present invention. The same reference numerals as those in FIG. 2 indicate the same parts. In this example, the oil separation plate 55 of the oil separator 12 has a cylindrical shape, and the wire mesh 56 is filled between the oil separation plate 55 and the housing 21 and in the cylindrical oil separation plate 55. Further, the cooling fins 57 are attached to the pipe line 25 connected to the inlet 23 of the oil separator 12.

In the oil separator 12 having such a configuration, the compressed air supplied from the compressor 10 is cooled by the cooling fins 57, the degree of emulsification of the vaporized oil increases, and most of the oil in the compressed air becomes a viscous body. , Adheres to the oil separation plate 55 and the wire mesh 56. As a result, the oil content can be removed more reliably before the air dryer. In this case, the auxiliary oil separator 42 shown in FIG. 3 may not be provided.

[Advantages of the Invention] As described above, according to the present invention, the oil separator is arranged in front of the air dryer, so that the viscous substance generated by emulsification of oil can be captured before flowing into the air dryer. As a result, there is an excellent effect that the desiccant does not adhere to the viscous body and the dehumidifying function of the desiccant is not lowered.

In addition, the oil separator of the present invention is formed of a single oil separation plate, and the oil reservoir is provided below the oil separation plate. Further, since only a single oil separating plate is provided inside the oil separator, there is also an advantage that inspection and maintenance inside the oil separator can be easily performed.

[Brief description of drawings]

FIG. 1 is a block diagram of a purification device according to an embodiment of the present invention. FIG. 2 is an enlarged sectional view of the oil separator. FIG. 3 is an enlarged sectional view of the air dryer. FIG. 4 is an enlarged cross-sectional view of the oil separator of the purification apparatus according to another embodiment of the present invention. 10: compressor, 11: air dryer, 12: oil separator, 14: check valve, 15: air tank, 1
6: pressure regulator, 23: oil separator inlet, 2
4: outlet of oil separator, 28: oil discharge valve, 34: exhaust valve, 48: desiccant.

Claims (1)

[Scope of utility model registration request] 1. A desiccant (48) is housed therein, and an exhaust valve (34) is attached to a lower portion of the desiccant.
The air dryer (11) that dehumidifies by (48), the air tank (15) that stores the dehumidified compressed air from the air dryer (11) via the check valve (14), and the pressure of the air tank (15) are specified. A compressed air for vehicles, which is provided with a pressure regulator (16) for maintaining the pressure, and is configured to regenerate the desiccant (48) by opening the exhaust valve (34) when the pressure regulator (16) operates. In the purification device, an oil separator (12) is provided between the compressor (10) and the air dryer (11), the oil separator (12) is an inlet (23) communicating with the compressor (10), and An outlet (24) communicating with the air dryer (11) and a single compressed air flow path between the inlet (23) and the outlet (24) vertically installed so as to block the flow of the compressed air. When the oil separation plate (27), the oil reservoir chamber (12a) provided below the oil separation plate (27), and the pressure regulator (16) are activated. There are the oil reservoir chamber discharge valve for discharging the oil collected in the (12a) (28) and purification system of compressed air vehicle comprising the.