JP2549087Y2 - Compressed air dryer - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compressed air drying apparatus used for a compressed air pressure source such as a vehicle air brake device and a door opening / closing device.

[0002]

2. Description of the Related Art Conventionally, as this kind, for example,
As shown in Japanese Utility Model Application Laid-Open No. 2-121119, a main body forming an internal space between the inlet and the outlet provided with an inlet connected to an air compressor and an outlet connected to an air storage tank, and the inner space A renewable desiccant that removes moisture in the compressed air flowing from the inlet to the outlet, and an oil component in the compressed air provided on the inlet side of the desiccant and flowing from the inlet to the desiccant. And a drain valve housed in a cylindrical portion protruding toward the oil filter and capable of communicating the inlet side of the oil filter with the atmosphere in response to an external command. On the outer peripheral side of the portion, an inner end of the inlet is opened to form an annular inlet chamber communicating between the inlet and the oil filter, and the inlet chamber is connected to the oil filter through a passage arranged in an annular shape. There is a thing that was passed. In this conventional compressed air drying apparatus, the compressed air flowing from the inlet to the inlet chamber flows into the oil filter from the lower side directly over the entire circumference. For this reason,
There is a problem that the oil contained in the compressed air is not sufficiently removed by the oil filter, reaches the desiccant, and the desiccant is contaminated early.

[0003]

In order to solve this problem, it is conceivable to provide the main body with multiple walls so that a corridor-like passage is formed in the entrance chamber. And a problem arises in that the device becomes large.

The present invention has been made in order to solve the above-mentioned problem, and has a simple structure, a compressed air drying apparatus capable of enhancing the oil removing effect at the pre-stage of the desiccant and preventing the premature deterioration of the desiccant. The purpose is to provide.

[0005]

In order to achieve the above object, the present invention has a plate member for partitioning between an oil filter and an inlet chamber. The plate member includes the oil filter side and the inlet chamber side. A communication port is formed so as to be deviated to the side opposite to the entrance when viewed in the radial direction of the entrance chamber with the cylindrical portion as a boundary, and the entrance chamber extends in a direction intersecting with the plate member. The structure is such that a substantially single-shaped obstacle wall portion facing the entrance is provided.

[0006]

In the compressed air drying apparatus according to the present invention, the compressed air flowing from the inlet to the inlet chamber is first changed in flow direction by colliding with the obstacle wall, thereby forming a curved flow along the outer periphery of the cylindrical portion. It is reliably generated and travels a long path in the inlet chamber and flows into the oil filter through the communication port of the plate member. Therefore, the oil component contained in the compressed air is dropped not only in the oil filter itself but also in the inlet chamber due to the collision and cooling action, and is sufficiently removed.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is an overall vertical cross-sectional view of a compressed air drying apparatus, FIG. 2 is an enlarged vertical cross-sectional view of a main part, and FIG. 3 is a horizontal cross-sectional view of a main part.

In FIGS. 1 and 2, reference numeral 1 denotes a main body of a compressed air drying apparatus, which comprises a base member 2 and a casing 3.

Reference numeral 2 denotes a base member which has an inlet 4 on its outer peripheral surface.
And an outlet 5 are opened, and an outlet hole 5A communicating with the outlet 5 is opened in a peripheral portion of the upper surface. A large-diameter recess 6 opening upward is formed in the base member 2, and a cylindrical portion 8 for accommodating a drain valve 7 opening downward is formed in the recess 6 from the center of the recess 6. An exhaust tube portion 9 concentrically connected to the tubular portion 8 projects downward from the bottom of the base member 2. From the bottom of the recess 6, the obstacle wall portion 10 is located between the inlet hole 4 </ b> A opening into the recess 6 and the cylindrical portion 8. Hole 4A
Is formed as a substantially plate-like body having a width in a direction orthogonal to a line connecting the center of the hole diameter and the center of the outer periphery of the cylindrical portion 8 and slightly curved in the width direction, and the concave side is an inlet hole 4A.
Facing.

Reference numeral 11 denotes a drying cylinder, which has a fitting portion 12 formed at a lower portion thereof, which forms a step portion 11A and has a reduced diameter. Reference numeral 13 denotes a flange member, which is externally fitted to the fitting portion 12 of the drying cylinder 11 and is integrally fixed to the step portion 11A.

In the drying cylinder 11, the fitting portion 12 is fitted in the recess 6 of the base member 2, and the upper end portion 2A of the wall defining the recess 6 is formed.
Is placed on the flange member 13 via the flange member 13.
Is fixed to the base member 2 by bolting. An oil filter 14 is additionally stored in the fitting portion 12 of the drying cylinder 11, and a perforated plate 15 is stacked on the oil filter 14.
The perforated plate 15 is fixed to the bottom of the fitting portion 12 by bolts and nuts 16. A plurality of through holes are formed at the bottom of the fitting portion 12. A felt member 17 is stacked on the perforated plate 15, and a renewable granular desiccant 18 is filled thereon. A perforated plate 19 having a peripheral wall is fitted to the upper end of the drying cylinder 11, and the perforated plate 19 and a lid 20 of the drying cylinder 11 are fitted.
A spring 21 interposed therebetween applies a pressing force to the tank filled with the desiccant 18 via the perforated plate 19 and the felt member 22. The lid 20 is formed with a throttle hole 23 and a plurality of through holes 24, and a check valve 25 for closing the through hole 24 from the outer surface side is attached thereto. It is fixed to.

The casing 3 has its lower opening externally fitted to the outer periphery of the base member 2 with a seal member 27 interposed therebetween, and is fixed to the base member 2 with a retaining ring 28. In between, a regeneration air storage tank 29 is partitioned. The outlet hole 5A is open toward the regeneration air storage tank 29.

The drain valve 7 includes a valve plug 30, a valve piston 31, a valve spring 32, a valve body 33, a bolt 34, and a valve hole 3.
5 and housed in the following configuration over the cylindrical portion 8 and the exhaust cylindrical portion 9 of the base member 2.

A valve plug 30 is inserted between the cylindrical portion 8 of the base member 2 and the exhaust tube portion 9, and the valve plug 30 is a cylindrical spacer 36 fitted into the exhaust tube portion 9. And a stopper ring 38 for preventing the stopper 36 from coming off through a discharge tube 37 having a flange fitted into the exhaust tube portion 9 below the spacer 36. Inside the valve plug 30 is a passage 8 formed in the cylindrical portion 8.
A valve piston 31 is slidably housed therein by being urged upward by a valve spring 32 and has a valve body 3 at the lower end of the valve piston 31.
3 is attached by bolts 34. The valve body 33 has a peripheral portion of a valve hole 35 formed in the valve plug 30 as a valve seat,
It is always sitting on this valve seat. The valve plug 30 defines a control chamber 39 in the tubular portion 8.
Reference numeral 9 denotes a control port 4 formed on the outer periphery of the base member 2.
It communicates with 0.

Reference numeral 41 denotes a main oil filter, in which a fine passage is formed in a mesh shape by a belt-like or linear aluminum material. Reference numeral 42 denotes a plate member integrated with the lower surface of the oil filter. The plate member 42 has a short cylindrical wall 43 around its periphery, and two engagement holes 44 spaced at a predetermined interval in the circumferential direction as shown in FIG. A plurality of communication ports 45 spaced apart are formed. The plate member 42 is fitted into the recess 6, and the engagement hole 44 is fitted to two detent projections 46 formed on the upper surface of the cylindrical portion 8 at predetermined intervals in the circumferential direction. Shape part 8
And the outer periphery of the cylindrical wall 43 is tightly supported by a taper wall 6A having a constant length that increases in diameter from the bottom of the recess 6 toward the inside of the recess 6, and between the bottom and the bottom of the recess 6. The entrance chamber 47 is partitioned. In this arrangement state, the plurality of communication ports 45 of the plate member 42 are located at positions sandwiching the tubular portion 8 with respect to the obstacle wall portion 10, and the upper surface of the main oil filter 41 is joined to the bottom of the drying tube 11. I have. 48 to 52 are sealing members.

The compressed air supplied from the air compressor to the inlet 4 flows into the inlet chamber 47 of the recess 6 from the inlet hole 4A. Since the compressed air that has flowed into the inlet chamber 47 collides with the obstacle wall section 10, the direction of the flow is changed in the direction along the inner periphery of the inlet chamber 47 as shown by the arrow in FIG. The compressed air from which the oil has been removed by the oil filter 41 flows into the oil filter 41 from the plurality of communication ports 45 and diffuses into the drying cylinder 11. After entering the drying cylinder 11 through the through hole, and further removing the remaining oil by the oil filter 14,
It flows into the packed bed of the desiccant 18 through the perforated plate 15 and the felt member 17. The compressed air rises in the packed bed of the desiccant 18, during which water is removed to become dry compressed air, passes through the felt member 22 and the perforated plate 19, and passes from the through hole 24 of the lid 20 to the storage tank 29 for regeneration. Inflow. The flowing dry compressed air fills the regenerating storage tank 29 while the check valve 25
, And is supplied to a main air storage tank (not shown) through a flow pipe to an outlet 5 through an outlet hole 5A.

The regeneration of the desiccant 18 is automatically performed by monitoring the internal pressure of the main air storage tank and when the internal pressure reaches the upper limit pressure, using the air pressure signal of a governor device (not shown). It is. That is, the air pressure signal is supplied to the control port 40 of the base member 2 and is supplied to the control chamber 39.
Flows into. Thereby, the valve piston 31 is connected to the valve spring 3.
The valve body 33 moves down against the spring force of 2, the valve body 33 is separated from the valve seat, the drain valve 7 is opened, and the inside of the device communicates with the atmosphere. When the drain valve 7 is opened, the drain accumulated at the bottom of the recess 6 is released into the atmosphere at a stretch, and the dry compressed air in the regeneration storage tank 29 flows back into the drying cylinder 11 through the throttle hole 25, The regenerating desiccant 18 flows down in the drying cylinder 11 and flows out to the atmosphere through the oil filters 14 and 41.

The inlet is connected to a discharge port of an air compressor (not shown), and the outlet is connected to an air storage tank (not shown).

In the present embodiment, the compressed air discharged from the air compressor and flowing into the inlet chamber 47 of the base member 2 collides with the obstacle wall portion 10, so that a part of oil is separated here.
Furthermore, after the collision, the compressed air flows around the cylindrical portion 8 and then enters the oil filter 41.
Oil drops due to the cooling action increase.

Therefore, according to the present embodiment, the compressed air that has flowed into the inlet chamber 47 of the base member 2 is subjected to the oil removing action before entering the oil filter 41, and then passes through the oil filters 41 and 14. Therefore, the oil removal efficiency can be increased as compared with the related art.

Further, in this embodiment, instead of forming multiple wall surfaces in the entrance chamber 47 to form a corridor-like passage,
A simple means of forming a simple-shaped obstacle wall portion 10 on the base member 2 and providing a simple-shaped plate member 42 is used. Since a path can be secured, the effect of removing oil in the former stage of the desiccant can be enhanced.

In the above embodiment, the plate member 42 is integrated with the oil filter 41. However, the plate member 42 may be assembled separately from the oil filter 41.

A similar effect can be obtained by forming a notch in the outer peripheral portion of the plate member 42 instead of the communication port 45 formed in the plate member 42. It may be formed on the 42 side.

Further, two oil filters 41, 1 are provided.
One of the four may be omitted, and the obstacle wall portion 10 may have a shape of a single character (not curved).

[0026]

As described above in detail, according to the compressed air drying apparatus of the present invention, when forming a long path in the inlet chamber, a plate member having a simple shape is utilized by utilizing the existing tubular portion. In addition, since only the obstacle wall portion is provided, the effect of removing oil in the former stage of the desiccant can be enhanced and the early deterioration of the desiccant can be prevented without complicating the structure.

[Brief description of the drawings]

FIG. 1 is an overall vertical sectional view of a compressed air drying apparatus as one embodiment of the present invention.

FIG. 2 is an enlarged vertical cross-sectional configuration view of a main part of the compressed air drying device as one embodiment of the present invention.

FIG. 3 is a cross-sectional configuration view of a main part of the compressed air drying apparatus as one embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Compressed air dryer main body 4 Inlet 5 Outlet 6 Concave part 7 Drain valve 8 Cylindrical part 10 Obstacle wall part 14 Oil filter 18 Desiccant 42 Plate member 44 Engagement hole 45 Communication port 47 Inlet chamber

Claims (1)

(57) [Scope of request for utility model registration] 1. A main body forming an internal space between an inlet and an outlet provided with an inlet connected to an air compression device and an outlet connected to an air storage tank, and an inlet provided in the inner space. A renewable desiccant for removing moisture in the compressed air toward the outlet, an oil filter provided on the inlet side of the desiccant to remove oil in the compressed air from the inlet toward the desiccant, A drain valve housed in a cylindrical portion protruding toward the oil filter and capable of communicating the inlet side of the oil filter with the atmosphere in response to an external command; A compressed air drying device having an annular inlet chamber open at the inner end thereof and communicating between the inlet and the oil filter, comprising a plate member for partitioning between the oil filter and the inlet chamber; In the plate member, a communication port for communicating the oil filter side and the inlet chamber side is formed so as to be biased to a side opposite to the inlet when viewed in a radial direction of the inlet chamber with the cylindrical portion as a boundary. A compressed air drying device provided in the entrance chamber with a substantially one-character obstacle wall extending in a direction intersecting with the plate member and facing the entrance.