JPH0647548Y2 - Compressed air pressure source - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a compressed air pressure source for an air brake of a vehicle, for example.

[Conventional technology]

Conventionally, a compressed air pressure source of this type has been disclosed in Japanese Utility Model Laid-Open No. 57-93.
There is one shown in Japanese Patent Publication No. 20. The compressed air pressure source shown here includes a dryer that removes the moisture in the compressed air discharged from the air compression device by passing a regenerated adsorbent, and a storage tank that stores the dried compressed air. I am.
This dryer is equipped with a drain valve, which introduces an unload command (air pressure signal) supplied from an governor device that monitors the pressure in the storage tank to the air compression device, and opens the drain valve according to the command. The drain is discharged and the compressed air in the regeneration storage tank is caused to flow backward to regenerate the adsorbent.

[Problems to be solved by the device]

In addition to water, the compressed air discharged from the air compressor is
Since it contains oil, an oil filter is built in the dryer in order to remove this oil, but with the built-in oil filter, it is difficult to sufficiently improve the oil removal efficiency. When it is necessary to remove the oil, an oil separator is separately provided.

However, when adding an oil separator, an oil adsorption member (mesh or felt material) inside the oil separator
Since it is also necessary to regenerate it, both the dryer and the oil separator must be provided with a drain valve that operates in response to the unload command, which leads to an increase in the size of the device and an increase in cost.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a compressed air pressure source capable of draining and regenerating both a dryer and an oil separator by opening one drain valve. And

[Means for Solving the Problems]

In order to achieve the above-mentioned object, the present invention provides a passage that connects between the oil separator and the adsorbent of the dryer and between the oil separator and the air compressor, and provides a predetermined pressure difference in the passage. Therefore, a check valve is provided to allow air movement from the adsorbent side.

[Action]

According to the present invention, when the drain valve of the oil separator opens and the pressure in the oil separator drops, the check valve automatically opens due to the pressure difference between the pressure in the dryer and the pressure in the passage. , Communicate the inside of the oil separator and dryer with the atmosphere.

〔Example〕

 An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, 1 is an air compression device, 2 is an oil separator, and compressed air discharged from the air compression device 1 is introduced into an inlet of the oil separator 2 through a pipe line 3. The outlet of the oil separator 2 is connected to the inlet of the drier 6 by a line 5 having a check valve 4, the outlet of the drier 6 is connected to the storage tank 8 via the check valve 7, and the drier 6 The exhaust side of is connected to the conduit 3 through a check valve and a conduit 9 described later. A governor device 10 supplies an unload command to the air compression device 1 when the pressure in the storage tank 8 rises to the upper limit pressure and a load command when the pressure drops to the lower limit pressure. This unload command is also supplied to the control port of the oil separator 2.

As shown in FIG. 2, the oil separator 2 has a large-diameter cylindrical casing 21 mounted and fixed on the base 20, and a large-diameter cylindrical casing 21 mounted and fixed on the base 20 in the casing 21. Cylindrical main body that divides the regenerator storage tank 22 with the casing 21
Has 23. The main body 23 is a cylindrical body having an upper lid 24 having an air outlet 24b and a bottom 25 having a plurality of holes 25a, and a mesh member 26a and a felt member 26b therein.
The oil adsorbing portion 26 in which the oil is adsorbed on the perforated plates 40a, 40b, 40c, 40d is housed and is fixed to the upper surface of the base 20 in an upright direction by bolts (not shown). The base 20 has an inlet 28 opening to the peripheral surface and connected to the pipeline 3, and an outlet 29 communicating with the storage tank 22 and opening to the peripheral surface of the base to connect to the pipeline 5.
It has a vertical passageway 30 that opens to the top and this passageway 30
It communicates with the inside of the main body 23 through a plurality of holes 25a of 25. Further, the inlet 28 is open to the passage 30 from the side.
The base 20 has a recess 31 opening to the lower surface, and a drain valve 32 is provided in the recess 31. The drain valve 32 has a piston 34 that defines a control chamber 33 between the drain valve 32 and the upper bottom of the recess 31, and a valve body 35 that opens and closes the communication between the passage 30 and the exhaust port 37 in the piston 34.
Has been installed and is normally closed, but the control room 33
When an unload command is introduced through the control port, the piston 34 opens by opening the piston 34 against the return spring 36, thereby connecting the passage 30 to the exhaust port 37.

As shown in FIG. 3, the dryer 6 has a casing 60 mounted on a base 61 that closes the opening of a cylindrical casing 60 having an open lower end.
The smaller diameter body 62 is placed and fixed, and the casing 60 and the body
A regeneration storage tank 63 is formed between the storage tank 63 and 62. The main body 62 is a cylindrical body having a perforated bottom 62A, and is covered with an upper lid 65 having a check valve 64a and a throttle hole 64b, and an oil filter 66 and a regenerable adsorbent 67 inside. A spring 69 that applies a predetermined pressing force to the adsorbent 67 through a porous partition plate 68 is housed, and a bottom portion having a slightly small diameter is fitted in a recess 70 formed in the base 61 and provided in an upright direction. Has been. The base 61 has an inlet 71 that opens to the peripheral surface and communicates with the bottom side of the recess 70, an outlet 72 that also opens to the peripheral surface and communicates with the storage tank 63, and an exhaust hole 73 that opens from the bottom to the bottom of the recess 70. The pipe line 9 is connected to an exhaust port 75a of a plug member 75 which is screwed to the atmosphere side opening of the exhaust hole 73 and defines the valve chamber 74 in the exhaust hole 73. Above valve chamber 7
In the inside of the valve 4, a valve body 7 that is seated around the opening of the exhaust hole 73 on the side of the recess 70
A check valve 78 composed of 6 and a valve spring 77 that applies a pressing force to the valve body 76 from below is housed.

In this configuration, the compressed air discharged from the air compression device 1 enters the main body 23 through the conduit 3 from the inlet 28 of the oil separator 2 and the passage 30. This compressed air also
It enters the valve chamber 74 via the conduit 9 and applies a seating-direction pushing force to the valve body 76. The compressed air that has flowed into the main body 23 rises in the main body 23, and in this process, the oil content is removed by the oil adsorbing section 26 and flows out into the storage tank 22. Flow through the check valve 4 into the dry air 6 through the inlet 71 of the dryer 6. The compressed air that has flowed in enters the main body 62 from the recess 70, is further oil-removed by the oil filter 66, and then moves up in the layer of the adsorbent 67 to remove water during this rising process, and the check valve 64a. After flowing through the storage tank 63 to fill the storage tank 63, the check valve 7 is discharged from the outlet 72.
And then flows into the storage tank 8. The inside of the drier 6 becomes a high pressure Pb by the inflowing compressed air, and the high pressure Pb is the valve body 76 of the check valve 78.
However, since the pressure Pa of the compressed air acts on the valve body 76 from the valve spring 77 side, the valve remains closed. When Pa = Pb, the spring force of the valve spring 77 may be such a small spring force that the valve body 76 does not separate due to the weight of the drain accumulated in the recess 70.

When the pressure in the storage tank 8 rises and the governor device 10 generates the unload command, the air compression device 1 stops the discharge of compressed air and the drain valve 32 of the oil separator 2 opens. When the drain valve 32 is opened, the drain is discharged, and the compressed air in the storage tank 22 flows back into the main body 23 through the air outlet 24b and flows down while removing the oil component adhering to the oil component adsorbing member 27, and the exhaust port. Outflows to the atmosphere from 37. When the air compressor 1 stops the discharge of the compressed air and the drain valve 32 opens, the pressure in the pipe 3 and the pipe 9 drops to atmospheric pressure, so the valve body of the check valve 78 of the dryer 6 is reduced. 76 is high pressure from the body 62 side
Although receiving Pb, the pressure Pa received from the exhaust hole 73 side decreases to atmospheric pressure, so that the check valve 78 opens when the difference between the two exceeds the predetermined pressure set by the valve spring 77. When the check valve 78 is opened, the drain accumulated in the bottom of the recess 70 is discharged, and then the compressed air in the storage tank 63 flows into the main body 62 through the throttle hole 64b, regenerating the adsorbent 67 and flowing down. And exhaust port 75a
From the oil separator 2 to the pipe line 9, the pipe line 3, the drain valve 32 of the oil separator 2, and the exhaust port of the oil separator 2.
It will be released into the atmosphere from 37.

In the present embodiment, the compressed air discharged from the air compressor 1 is passed through the oil separator 2 and then supplied to the dryer 6 having the oil filter 66 built therein, so that the compressed air is directly guided to the dryer 6. The oil content in the compressed air can be sufficiently removed as compared with the one.

Moreover, although the dryer 6 is not provided with a drain valve that opens upon receiving an unload command, when the drain valve 32 of the oil separator 2 opens and the pressure inside the oil separator 2 decreases, a non-return check is made. The valve 78 automatically opens due to the pressure difference in the main body 62 and the pressure in the pipe line 9 to clean the oil adsorption portion 26 and adsorbent 67.
Since the regeneration is performed, there is no fear that the regeneration efficiency will decrease, and the storage tank 8 can always store compressed air from which oil and water have been sufficiently removed.

[Effect of device]

As described above, according to the present invention, since it is not necessary to provide the drain valve in the dryer, the cost can be reduced and the entire apparatus can be downsized as compared with the case where the oil separator is simply added. it can.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an embodiment of the present invention, FIG. 2 is a vertical sectional view of an oil separator in the above embodiment, and FIG. 3 is a vertical sectional view of a dryer in the above embodiment. 1 ... Air compression device, 2 ... Oil separator, 6 ... Dryer, 3, 9 ... Pipe line, 8 ... Storage tank, 10 ... Governor device, 32 ... Drain valve, 67 ... Adsorbent, 78 ... Check valve.

Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display area F04B 39/16 G 7618-3H

Claims (1)

[Scope of utility model registration request] 1. An air compressor, an oil separator for removing oil in compressed air discharged from the air compressor, and a regenerable adsorbent for removing water in compressed air from the oil separator. And a storage tank for storing the compressed air from the dryer, and when the pressure in the storage tank reaches a first predetermined value, an unload command is given to the air compression device and a second lower value than the first predetermined value is given. A governor device that gives a load command when reaching a predetermined value, and a drain that is provided between the oil separator and the air compression device and that connects the air compression device side of the oil separator to the outside air in response to an unload command of the governor device. A compressed air pressure source having a valve, a passage connecting the oil separator and the adsorbent, and the oil separator and the air compressor to each other. Together with the compressed air pressure source provided with a check valve that allows air transfer from the adsorbent side at a predetermined pressure differential passage.