JP2005066470A - Cleaning equipment of compressed air for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide cleaning equipment of compressed air for vehicles that prevents the ground and the like from being contaminated with oil when the oil and the moisture in the compressed air are separated by an air dryer and the separated oil and moisture are exhausted from the outlet to atmosphere. <P>SOLUTION: The cleaning equipment of compressed air for vehicles is equipped with the air dryer at the passage introducing the compressed air to the air compressor. The equipment separates the oil and the moisture in the compressed air and exhausts the separated oil and moisture from the outlet to atmosphere through a purge valve. The equipment is provided with an oil recovering device 21 equipped with an oil adsorption mat 19 under the outlet 14 of the air dryer 2, which adsorbs the oil exhausted from the outlet 14. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention is for a vehicle in which oil and moisture in compressed air are separated by an air dryer, and when the separated oil and moisture are discharged to the atmosphere from an outlet of the air dryer, the ground and the like are prevented from being soiled by the oil. The present invention relates to a device for purifying compressed air.

  FIG. 2 is a schematic view of a conventional compressed air system for a combined pneumatic / hydraulic brake used in, for example, buses and trucks. The compressed air system includes a piston-type air compressor 1 driven by an engine, an air dryer 2 (purifying device) that introduces compressed air compressed by the air compressor 1 to remove oil and moisture in the compressed air, An air tank 3 for storing compressed air from which oil and moisture have been removed by the air dryer 2, and using the compressed air stored in the air tank 3 to operate an air / hydraulic composite brake by operating a brake pedal. I am doing so. The air dryer 2 is provided, for example, on a bottom plate 5 (floor plate) at the rear of the bus 4 shown in FIG.

  As shown in FIG. 2, the air dryer 2 includes an oil filter 6, a desiccant storage chamber 8 that stores the desiccant 7, a purge tank 9 that surrounds the desiccant storage chamber 8, and a purge chamber that includes a purge valve 11. 12. The purge valve 11 is opened and closed by a signal air sent through a signal air pipe 10a by a pressure regulator 10 that operates based on the pressure of compressed air in the air tank 3. An orifice 13a and a check valve 13b are provided at the top of the desiccant storage chamber 8, and oil and moisture are discharged to the atmosphere below the purge valve 11 in the purge chamber 12 when the purge valve 11 is opened. A discharge port 14 is provided. In the air dryer 2, as shown by a two-dot chain line in FIG. 2, a silencer 15 is provided in the discharge port 14 to mute the oil and moisture. An opening is provided in the bottom plate 5 of the bus 4 in FIG. 4, and the discharge port 14 or the silencer 15 of the air dryer 2 is provided so as to face the opening. Therefore, when the purge valve 11 is opened, the oil content is reduced. And water is discharged toward the ground through the opening. In the figure, 16 is a check valve provided at the compressed air inlet of the air tank 3.

  When compressed air is generated, dehumidification (purification) is performed as follows. As shown in FIG. 2, the compressed air from the air compressor 1 enters the inside of the air dryer 2 through the inlet 2 a, is cooled by the structural member of the purge chamber 12, and oil and moisture are stored at the bottom of the chamber. When the compressed air passes through the oil filter 6, small oil droplets and dust are removed and the compressed air is sent into the desiccant 7. The compressed air becomes dry compressed air when the remaining moisture is absorbed by contact with the desiccant 7, and the dried compressed air is sent from the outlet 9a of the purge tank 9 to the air tank 3 via the check valve 16. Stored.

  On the other hand, the regenerating action of the desiccant 7 and the oil filter 6 is performed as follows. As shown in FIG. 3, when the pressure of the compressed air in the air tank 3 reaches the upper limit, the signal air pressure from the pressure regulator 10 acts on the air compressor 1, and the air compressor 1 enters an unloaded (no load) state and idles. At this time, the same signal air pressure acts on the purge valve 11 of the air dryer 2 through the signal air pipe 10a to open the purge valve 11, thereby opening the interior of the desiccant storage chamber 8 to the atmosphere.

  At this time, since the pressure release in the desiccant storage chamber 8 is abruptly released, the oil filter 6 is cleaned by backwashing, and oil and water accumulated in the bottom of the purge chamber 12 are also released to the atmosphere.

  After the rapid pressure reduction, the compressed dry air in the purge tank 9 passes through the orifice 13a and expands under reduced pressure in the desiccant storage chamber 8, and flows back into the desiccant storage chamber 8 as super dry air. Thus, moisture is recovered from the desiccant 7 and carried to the atmosphere, and the regeneration of the desiccant 7 is completed.

  When the air compressor 1 is loaded again, the purge valve 11 is closed when the signal air pressure of the pressure regulator 10 is lost, and dehumidifies again.

Examples of the air dryer for compressed air for vehicles as described above include Patent Document 1, Patent Document 2, and Patent Document 3.
Japanese Utility Model Publication No. 63-157234 Japanese Utility Model Publication No. 03-056625 JP 05-201330 A

  If moisture is present in the compressed air introduced to the pneumatic / hydraulic combined brake system, rusting will occur in the piping and equipment, and this rusting will interfere with the operation of the valve, etc. When oil is present, the oil is attached to the desiccant 7 and the water removing function of the desiccant 7 is significantly reduced. Therefore, various kinds of oils and moisture in the compressed air have been conventionally removed effectively. A purification device of this type has been proposed.

  However, in any of the purification apparatuses, as shown in FIG. 3, the oil and water separated by the air dryer 2 are discharged from the discharge port 14 to the atmosphere via the purge valve 11.

  For this reason, whenever the pressure of the air tank 3 reaches the upper limit, the purge valve 11 is opened and oil and moisture are discharged to the outside from the discharge port 14, so that the bus 4 or the truck shown in FIG. Regardless of when it is stopped, etc., oil and moisture will be discharged to the atmosphere at any time. At this time, even if water is discharged, it is not a problem because it evaporates and dry. However, since the oil does not evaporate and is black and dirty, the road surface, parking lot, customer's garden or floor, etc. It was not friendly to the earth. Thus, in order to impair the aesthetics of the road surface and the parking lot, the black soiled portion is cleaned with oil, but this work is very difficult.

  In view of the above circumstances, the present invention separates oil and moisture in compressed air with an air dryer, and prevents the oil from contaminating the ground and the like when the separated oil and moisture are discharged to the atmosphere from an outlet of the air dryer. It is an object of the present invention to provide a vehicular compressed air purification device.

  According to the first aspect of the present invention, an air dryer is provided in a path for guiding the compressed air of the air compressor to the air tank to separate the oil and moisture in the compressed air, and the separated oil and moisture are discharged from the discharge port to the atmosphere via the purge valve An apparatus for purifying compressed air for a vehicle that discharges the oil into the vehicle, wherein an oil content recovery device including an oil adsorption mat that adsorbs the oil content discharged from the discharge port is provided below the discharge port of the air dryer. The present invention relates to a compressed air purifying device for a vehicle.

  According to a second aspect of the present invention, in the vehicle compressed air purifying device according to the first aspect, the oil recovery unit includes a holding container that supports the oil adsorption mat so as to be replaceable. It is related to.

  The invention according to claim 3 is characterized in that a silencer is provided at a discharge port of the air dryer, and the oil recovery unit is provided at a lower portion of the silencer. Device.

  According to the apparatus for purifying compressed air for a vehicle of the present invention, the oil content recovery device provided with the oil content adsorption mat for adsorbing the oil content discharged from the air discharge port is provided at the lower part of the air discharge port. When the discharged oil and moisture are discharged from the air dryer outlet to the atmosphere, the oil can be adsorbed by the oil adsorbing mat, so that the problem of soiling the ground and the like can be reliably prevented.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  FIG. 1 is a cut side view showing an example of a vehicle compressed air purifying apparatus according to the present invention. The air dryer 2 is fixed to the structural member 18 of the vehicle body so that the outlet 14 of the air dryer 2 shown in FIG. 2 faces the opening 17 formed in the bottom plate 5 (floor plate) of the bus or truck.

  Further, an oil content collector 21 in which, for example, a sponge-like oil content adsorption mat 19 that adsorbs the oil content discharged from the discharge port 14 of the air dryer 2 is supported by a holding container 20 is provided in the opening 17. The holding container 20 includes a moisture outlet 22 in the lower part for dropping moisture. The holding container 20 is detachably attached to the bottom plate 5 by a fixing member 23 such as a bolt or a locking tool, so that the oil adsorption mat 19 can be replaced.

  The holding container 20 may employ a method other than the method of attaching to the opening 17 of the bottom plate 5. That is, only the opening 17 is formed in the bottom plate 5, and the holding container 20 is detachably attached to the discharge port 14 of the air dryer 2, or the discharge port 14 of the air dryer 2 as indicated by a two-dot chain line. In the case where the silencer 15 is provided, the holding container 20 may be detachably attached to the silencer 15.

  According to the configuration of FIG. 1, the oil content recovery device 21 having the oil content adsorption mat 19 that adsorbs the oil content discharged from the discharge port 14 is provided below the discharge port 14 of the air dryer 2. When the oil and moisture separated in 2 are discharged to the atmosphere from the discharge port 14 of the air dryer 2 by purging, the oil and the moisture are first guided to the oil adsorption mat 19, so that the oil is adsorbed by the oil adsorption mat 19. Accordingly, oil is not discharged to the ground or the like, and thus the problem of soiling the ground or the like due to the oil is prevented. At this time, water passes through the oil adsorption mat and is dropped to the lower part.

  Further, since the oil adsorption mat 19 can be replaced by the detachable holding container 20, the oil adsorption mat 19 can be periodically replaced when the oil adsorption mat 19 contains a large amount of oil. it can. Thereby, the oil component discharged at the time of purging is always adsorbed reliably, and the problem of the oil component being discharged and soiling the ground or the like can be prevented.

  Even when the exhaust port 14 of the air dryer 2 is provided with the silencer 15, the oil component discharged from the silencer 15 is adsorbed and collected by the oil component adsorption mat 19.

  In the configuration of FIG. 1, the air outlet 2 of the air dryer 2 or the lower end of the silencer 15 is disposed so as to be inserted into the holding container 20, and oil and moisture are sprayed onto the oil adsorption mat 19. Thus, it is preferable to prevent the discharged oil and moisture from scattering to the outside.

  The compressed air purifying device for a vehicle of the present invention is not limited to the above-described embodiment, and the shape of the holding container can be variously changed, and various other modifications can be made without departing from the gist of the present invention. Of course, changes can be made.

It is a cutting side view showing an example of the purification device for compressed air for vehicles of the present invention. 1 is a schematic view of a compressed air system for an air / hydraulic composite brake. FIG. FIG. 3 is an operation explanatory diagram of dehumidification (purification) performed when compressed air is generated in the apparatus of FIG. 2. It is a schematic side view which shows the state in which the air dryer was provided in the baseplate of the rear part of a bus | bath.

Explanation of symbols

1 Air compressor 2 Air dryer (Purification device)
3 Air tank 11 Purge valve 14 Discharge port 15 Silencer 19 Oil adsorption mat 20 Holding container 21 Oil recovery unit

Claims (3)

  For vehicles that have an air dryer in the path leading the compressed air of the air compressor to the air tank to separate the oil and moisture in the compressed air, and the separated oil and moisture are discharged from the discharge port to the atmosphere via the purge valve A compressed air purifier for a vehicle, comprising: an oil content recovery device provided with an oil content adsorption mat for adsorbing oil content discharged from the exhaust port at a lower portion of the exhaust port of the air dryer. Purification equipment.   2. The apparatus for purifying compressed air for vehicles according to claim 1, wherein the oil recovery unit includes a holding container that supports the oil adsorption mat so as to be replaceable.   The apparatus for purifying compressed air for vehicles according to claim 1 or 2, wherein a silencer is provided at a discharge port of the air dryer, and the oil recovery unit is provided at a lower portion of the silencer.

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