JP3167251B2 - 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 device used for an air brake device of a vehicle and for removing moisture in compressed air.

[0002]

2. Description of the Related Art In order to enhance the oil removal capability, compressed air having a downward flow (arrow A) from an inlet passage 17 as shown in FIG.
The filter 27 passes upward through the space between the filter cover 32 and the lower filter cover 32 (arrow C), and then crosses the filter 27 toward the center of the drying container 9 (arrow D). 40, the hole 46a of the perforated plate 46 and the filter cloth 4
In the compressed air drying apparatus provided with a curved path of flowing through the desiccant 41 through the desiccant 41 (arrow E), oil droplets and the like can be attached between them, but the outer filter 27
Since relatively large oil droplets and the like adhere to a, there has been a problem that the removing ability decreases with use.

Therefore, a baffle plate 33 which prevents compressed air from directly flowing into the filter 27 and which can remove relatively large oil droplets or the like is fitted to the upper filter cover 31 below the lower filter cover 32 as shown in FIG. So that the flow of compressed air flows through the inlet passage 17 (arrow A) and the baffle plate 33.
Between the upper filter cover 31 and the baffle plate 33 and the lower filter cover 3 (arrow B).
2, the filter 27 (arrow D), the hole 24 of the drying container 9 and the hole 46 of the perforated plate 46 of the lower partition plate 40.
a and the filter cloth 44 (arrow E) in order to improve the oil removal ability. However, this increases the number of parts. Further, the baffle plate 33 is fitted to the upper filter cover 31 as described above, and the upper filter cover 31 is attached below the drying container 9 with an inverted cup-shaped sealing member 34 made of rubber interposed therebetween. Because
Assembly is complicated and installation takes time.

Further, in Japanese Utility Model Publication No. 6-7776,
A body connected to an inlet connected to the air compression device and an outlet connected to the compressed air storage tank to form an internal space, and arranged in the internal space such that one end is connected to the inlet and the other end is connected to the outlet. A drying container, a desiccant contained in the drying container, a filter disposed on the one end side of the drying container, a cover surrounding an outer periphery of the filter, and a cover for covering the inlet side of the filter. A compressed air drying device having a baffle for preventing air from directly flowing into the filter is disclosed. However, even in such a device, in order to increase the oil removing ability, the compressed air is not directly flown into the filter, and the compressed air is blown against the baffle plate to drop the oil. Since a new board is provided, the number of parts increases, and installation takes time.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and provides a compressed air drying apparatus having a high oil removing ability without increasing the number of parts and without taking time for installation. The purpose is to:

[0006]

The object of the present invention is to provide a main body having an internal space formed by connecting an inlet connected to an air compressor and an outlet connected to a compressed air storage tank; A drying container disposed at the other end thereof in communication with the outlet, a desiccant contained in the drying container, and a drying agent disposed outside the bottom at one end side of the drying container ;
When supported by the lower filter cover that covers the bottom of the
In particular, a filter whose side peripheral surface is opened in the radial direction, a cover surrounding the outer periphery of the filter, and a baffle plate that covers the inlet side of the filter and prevents compressed air from flowing directly into the filter. In the compressed air drying apparatus provided, a cover member in which the cover and the baffle plate are integrated
Characterized in that it is engaged with the outer periphery of the end portion on the drying container side.
Compressed air drying apparatus is accomplished by.

[0007]

[Function] A cover member integrally formed with a cover and a baffle plate
Since a structure engaged with the outer circumference of the end portion of the drying vessel side, cover and baffle and the amount is not necessary to provide separately, requires less parts, the cover portion after completed installation of the filter
Installation of the material becomes easy. Further, the compressed air can be prevented from directly flowing into the filter, and a high oil removing ability can be maintained. In addition, remove the cover member from the drying container.
Simply remove it to expose the filter side peripheral surface to the outside.
From here, you can check the status of filter clogging and dirt
It can be confirmed visually.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a compressed air drying apparatus according to the present invention will be described below with reference to the drawings.

FIG. 1 is a front sectional view of a compressed air drying apparatus according to the present invention. In FIG. 1, reference numeral 1 denotes the entire compressed air drying apparatus. An internal cavity 4 having an opening 2a is formed in the main body 2 of the compressed air drying device 1, and a flange portion having a groove for installing a seal ring 3 on an upper surface is formed on the outer periphery of the opening 2a. 2b and the flange portion 2b
Are formed integrally with each other, and a compressed air inlet 5 that communicates an air compressor (not shown) with the internal space 4 is provided.

On the upper surface of the main body 2, a flange 9b is provided at the center.
And a regeneration tank 10 having a flange portion 10a below.
b, 10a and the flange portion 2b of the main body are aligned, and are integrally fixed to each other by a plurality of bolts 12. on the other hand,
Below the main body 2, a drain valve main body 7 of the drain valve section 6 is formed integrally with the main body 2.

In the drain valve section 6, a drain valve body 7
The hole 53 communicates with the control port 52 via a passage 54 on the one hand, and communicates with an inlet passage 17 described later via a passage 55 on the other hand. The plug 60 inserted into the hole 53 has a hole 56 and a hole 57 formed therein, and a control piston 58 is slidably disposed in the hole 56. A discharge valve seat 66 is formed above the hole 57,
The lower part of the hole 57 is open to the atmosphere. The chamber 50 in the hole 53 defined by the plug 60 and the control piston 58 communicates with the control port 52 via the passage 54. At a lower end of the control piston 58, a valve member 61 made of an elastic material is
The valve member 61 cooperates with the discharge valve seat 66 to control the communication between the internal space 4 of the main body 2 and the atmosphere. Hole 56 formed by control piston 58
The inner chamber 64 communicates with the passage 55 by the notch passage 65 and the lateral passage 59. A valve spring 67 stretched in the chamber 64 urges the control piston 58 upward. The plug 60 is retained by a retaining ring 69 via a discharge cylinder member 68. Reference numerals 70, 71 and 72 are seal rings.

[0012] regeneration tank 10, and an opening and a flange portion 10a downward, a cylindrical body of thin having a bore 14 therein, the drying vessel 9 on the opening side of the inner hole 14 The upper part of the cylindrical portion 9a is fitted via a seal ring 15. Further, above the regeneration tank 10, there is a compressed air outlet 11 for communicating the inner hole 14 with a compressed air storage tank (not shown).

The drying container 9 is a cylinder having a flange portion 9b and an inner hole 9d having an opening 9c at an upper portion. The lower portion of the cylindrical portion 9a is charged into the internal space 4 of the main body 2. Thus, an inlet passage 17 is defined between itself and the main body 2, and the upper portion is fitted into the inner hole 14 of the regeneration tank 10 as described above. Further, in this embodiment, an annular convex portion 13 and a groove for pushing the seal ring 36 are provided on the outer periphery below the cylindrical portion 9a. At the bottom of the drying container 9, an inner central protruding portion 26a protruding toward the center of the inner hole 9d side, an outer central protruding portion 26b protruding largely toward the outer center, and a plurality of ring-shaped protruding portions for positioning the filter 27 on the outer side. Parts 9e and 9f are formed integrally. The outer central protruding portion 26b is provided for the filter 2
7 is secured by bolts 25 together with the center of the lower filter cover 32. A hole 24 is provided in the vicinity of the central protruding portions 26a, 26b to communicate the inner hole 9d with the outside. The inner hole 9d of the drying vessel 9, a pair of upper and lower are slidably fitted partition plate 39, 40 relative to the bore 9d sides, and defines a chamber 42 between them, drying the chamber 42 The agent 41 is filled.

A pair of upper and lower partition plates 39 and 40 are provided with filter cloths 43 and 44 and porous plates 45 and 46 having a large number of holes, respectively, from the desiccant 41 side.
3 and 44 are polymerized on perforated plates 45 and 46. The lower perforated plate 46 is supported at its center by an inner central protruding portion 26a and at its peripheral portion by a ring-shaped perforated plate support member 47. A diffusion chamber 48 is defined between the lower perforated plate 46 and the bottom surface of the drying container 9 by compressed air. , Spread the desiccant 41 evenly. The upper porous plate 45 is formed in a cup shape to receive the lower end of the spring 19.

At the opening 9c of the drying container 9, a lid member 16 for covering the inner hole 9d has a flange 16a.
And is fixed by a plurality of bolts 18 in alignment with the upper end of the head.

The cover member 16 is a dish-shaped object having a projection 16b for receiving a spring formed at a lower portion and a flange portion 16a formed at an upper portion, and has a throttle hole 20 and a check valve 21 inside. And an exit hole 22 to be opened and closed. In addition, drying container 9
A groove is provided on the outer periphery of the lid member 16 fitted therein, and the seal ring 23 is pushed into the groove.

The spring 19 is a wound spring having a large diameter in the lower part. The spring 19 is interposed between the upper perforated plate 45 and the lid member 16 and the lid member 16 is fixed by bolts 18 so that the desiccant 4 is formed.
1 is compressed through an upper partition plate 39.

Next, the details of the oil removing portion according to the present invention will be described.

A ring-shaped filter 27 is provided outside the bottom of the drying container 9. The outer filter 27a is provided between the outer ring-shaped protrusion 9e and the inner ring-shaped protrusion 9f, and the inner filter 27b is provided between the inner ring-shaped protrusion 9f and the outer central protrusion 26b. these filter 27 and the bottom surface of the drying vessel 9, the bottom
The filter 27a is sandwiched by the upper surface of the lower filter cover 32 that covers the surface, and the side surface of the outer filter 27a is
It is open in the direction. Further, the upper part of the outer filter 27a is positioned by the outer ring-shaped protrusion 9e, the upper part of the inner filter 27b is positioned by the inner ring-shaped protrusion 9f, and the lower part of these filters 27 is positioned by the stepped part of the lower filter cover 32. I have. The lower filter cover 32 has a stepped cup shape, and has a central portion attached to the outer central protruding portion 26b of the drying container 9 as described above.

The cover member 30 according to the present invention is located upstream of the lower filter cover 32, and includes an upper cover portion 30a and a lower baffle plate portion 30b. The cover portion 30a has a cylindrical shape, and an annular convex portion 13 provided on the outer periphery of the cylindrical portion 9a of the drying container 9 is provided above the cover portion 30a.
Is provided with an annular concave portion 35 that fits into the concave portion. A seal ring 36 is interposed between the cover 30a and the drying container 9, and corresponds to the sealing member 34 in the conventional example shown in FIGS. Further, the cover portion 30a surrounds the outer periphery of the filter 27a, like the upper filter cover 31 of the conventional example. The baffle plate portion 30b has a convex portion 30c having a hole 30d on the bottom surface on the lower outer side, and is inclined downward toward the inner side, so that the oil droplets or Drop the water on the convex 30
It is formed so as to be dropped below c. The baffle plate 30b is formed to cover the inlet side of the filter 27, thereby preventing compressed air from flowing directly into the filter 27 and forming a passage bent before the filter 27. As a result, the flow of the compressed air collides with the baffle plate portion 30b and the lower filter cover 32,
The oil contained in the compressed air is removed and the filter 27 is removed.
Has the function of increasing the oil removal capacity of

The oil removing portion is constructed as described above, and this incorporation is performed as follows.

First, the drying container 9 is turned over so that the bottom of the drying container 9 faces upward. The inner filter 27b is disposed between the inner ring-shaped protrusion 9f and the outer center protrusion 26b so as to be inscribed in the inner ring-shaped protrusion 9f,
The outer filter 27a is disposed between the outer ring-shaped protrusion 9e and the inner ring-shaped protrusion 9f so as to be inscribed in the outer ring-shaped protrusion 9e. On top of these filters 27,
Inside of each filter 27 and lower filter cover 3
The lower filter cover 32 is placed with the two stepped portions in contact with each other, and the central portion thereof is fixed with the bolt 25. Further, the seal ring 36 is fitted into the groove of the drying container 9, and the cover member 30 is connected to the convex portion 13 of the drying container 9 and the cover member 3.
The cover portion 30a is fitted with the concave portion 35 of the cover portion 30a.

The oil removal part thus assembled is
Flange 9b of drying container 9 and flange 2b of body 2
And is inserted into the internal space 4 of the main body 2.

The compressed air drying apparatus according to the present embodiment is configured as described above, and the operation of this apparatus will be described below.

When an air compressor (not shown) is driven,
The compressed air is supplied to the inlet passage 17 through the compressed air inlet 5 of the main body 2 of the compressed air drying device 1. The compressed air passes through curved passages formed between the baffle plate portion 30b and the main body 2, between the baffle plate portion 30b and the drain valve main body 7, and between the baffle plate portion 30b and the lower filter cover 32. In the meantime, the oil contained in the compressed air is wiped off by the collision, and the oil is further removed by crossing the filter 27. After that, the diffusion chamber 48 is supplied to the desiccant 41 through the lower partition plate 40, where moisture is adsorbed by the desiccant 41, becomes dry compressed air, passes through the outlet hole 22, and opens the check valve 21. It is stored in the inner hole 14 of the regeneration tank 10. This dry compressed air is further stored in the compressed air storage tank from the compressed air outlet 11 of the regeneration tank 10.

When the air pressure in the compressed air storage tank reaches the first set pressure, a governor (not shown) generates a control pressure as an unload air pressure signal, and supplies this pressure to the control port 52 of the drain valve 6. . The signal pressure from the governor supplied to the control port 52 is introduced into the chamber 50 through the passage 54, and pushes down the control piston 58 against the spring force of the valve spring 67. As the control piston 58 lowers, the valve member 6
The valve 1 is separated from the discharge valve seat 66 and opened, and the internal space 4 of the main body 2 communicates with the atmosphere via the passage 55 and the lateral passage 59. At this time, the oil droplets and water droplets removed by the filter 27, the cover member 30, and the like are dropped below the convex portion 30c of the baffle plate portion 30b as described above. It is discharged to the outside smoothly. Further, since the tank is in communication with the atmosphere, the regeneration tank 10
Dry compressed air in the inside is sent back to the desiccant 41 through the throttle hole 20, and the condensed water adhering to the surface of the desiccant 41 is drained through the filter 27, the cover member 30, the passage 55 and the lateral passage 59. To the atmosphere to regenerate the desiccant 41.

When the internal pressure of the compressed air storage tank decreases to the second set pressure, the signal pressure from the governor is stopped, and the signal pressure at the control port is reduced to zero. Then, the control piston 58 is pushed up by the compressed valve spring 67, and the valve member 61 is seated on the discharge valve seat 66, so that the communication between the inside of the main body 2 and the atmosphere is shut off. Then, as described above, the air compression device is driven to start discharging compressed air. Thereafter, by repeating the above series of operations, dry compressed air adjusted to a predetermined pressure range is always stored in the compressed air storage tank.

As described above, according to the embodiment of the present invention, it is possible to have a high oil removing ability without increasing the number of parts and without troublesome mounting. Further, an annular convex portion 13 provided on the outer periphery of the drying container 9 is provided.
Since the cover member 30 is provided so as to fit the annular concave portion 35 of the cover member 30, the cover member 30 can be easily attached without using a tool or the like to attach the cover member 30. Further, the cover member 30 is removed from the drying container 9.
It is possible to expose the peripheral surface on the filter 27a side only by removing it.
So that the clogging of the filter 27a
The state of dirt can be visually checked.

Although the embodiments of the present invention have been described above, the present invention is, of course, not limited thereto, and various modifications can be made based on the technical concept of the present invention.

For example, in the present embodiment, the convex portion is provided on the drying container 9 and the concave portion for fitting with the cover member 30 is provided. Alternatively, the drying container 9 and the cover member 30 may be engaged with a small screw that does not obstruct the flow of the compressed air in the inlet passage 17 without providing, for example, a small screw.

Further, an axial slit may be formed from the upper end of the cover member 30 to the recess 35. By doing so, when the cover member 30 is mounted, the upper end of the cover member 30 can be elastically expanded in diameter, and mounting on the projection 13 becomes easy.

Further, in this embodiment, the compressed air drying apparatus 1 as shown in FIG. 1 has been described, but the present invention is also applicable to a compressed air drying apparatus 1 'as shown in FIG. FIG.
In the figure, the reference numeral of the compressed air drying device 1 'is the same as that of the compressed air drying device 1, and the detailed description is omitted, but the regeneration tank 10' of the compressed air drying device 1 'is omitted.
Covers the drying container 9 'and is aligned only with the main body 2', and the inner hole 14 ' of the regeneration tank 10' is provided not on the upper portion of the drying container 9 'but on the outer periphery. Further, the main body 2 'of the compressed air drying apparatus 1' has not only the compressed air inlet 5 'but also a compressed air outlet 11', and unlike the present embodiment, the main body 2 'is provided between the compressed air inlet 5' and the drying container 9 '. The entrance passage 17 is not defined. Lid member 16 'covering the upper part of drying container 9'
Although having a different shape from the present embodiment, it has the same holes and performs the same action. The control port 52, which is the signal pressure inlet, and the passage 54 communicating with the control port 52 are formed integrally with the main body 2 'similarly to the compressed air drying apparatus 1, though not shown. Cover member 3 used in this modified example
0 ′ has substantially the same structure as the cover member 30 used in the embodiment, and has a convex portion 3 fitted into the concave portion 13 ′ of the drying container.
A stepped cylindrical cover portion 30a 'having 5' above,
And a baffle plate 30b 'having a convex portion 30c' having a hole 30d 'on the bottom surface and having a downward slope inward. The assembly of the compressed air drying device 1 'is performed by positioning and sandwiching the filter 27 between the ring-shaped protrusion 9g of the drying container 9' and the lower filter cover 32, similarly to the compressed air drying device 1 of the embodiment. Then, the cover member 30 ′ is attached to the drying container 9 ′ so as to cover the filter 27. Further, the oil removing portion is positioned by aligning the flange portion 9b 'of the drying container 9' with the main body 2 'and tightening it with a bolt 73.

[0033]

As described above, according to the compressed air drying apparatus of the present invention, even if the cover member for preventing the compressed air from directly flowing into the filter is provided in order to enhance the oil removing capability, the cover can be removed. The unit and the baffle plate are integrally formed, so that the number of parts does not increase, and since only one cover member is covered with the filter, the work of assembling the oil removing part is easy, and the mounting is easy. Therefore, a high oil removing ability can be provided without any trouble. Furthermore, just remove the cover member from the drying container
Since the filter side surface can be exposed to the outside,
From here, visually check the condition of filter clogging and contamination.
Can be recognized.

[Brief description of the drawings]

FIG. 1 is a front sectional view of a compressed air drying apparatus according to an embodiment of the present invention.

FIG. 2 is a front sectional view of a main part of a compressed air drying device of a first conventional example.

FIG. 3 is a front sectional view of a main part of a compressed air drying device of a second conventional example.

FIG. 4 is a front sectional view of a modification of the above embodiment.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 compressed air drying device 2 main body 4 internal space 5 compressed air inlet 9 drying container 10 regeneration tank 11 compressed air outlet 17 inlet passage 27 filter 30 cover member 30 a cover 30 b baffle plate 32 lower filter cover 33 baffle plate 41 Desiccant 58 Control piston 60 Plug 61 Valve member

Claims (2)

(57) [Claims] A body connected to an inlet connected to an air compressor and an outlet connected to a compressed air storage tank to form an internal space, one end of the internal space being connected to the inlet, and the other end being connected to the outlet. A drying container arranged in communication with a desiccant contained in the drying container, and a bottom of the one end side of the drying container;
Lower filter cover located outside and covering its bottom
And its radially open side surface
A filter for a cover surrounding the outer periphery of the filter covers the inlet side of the filter, compressed air in the compressed air drying apparatus provided with a baffle plate to prevent flow into the direct filter, and the cover the A cover member that integrates the baffle plate ,
Characterized in that it is engaged with the outer periphery of the drying container side end.
And compressed air drying equipment. 2. A convex or concave portion is formed on the outer periphery of the drying container.
Formed on the cover member, the convex portion of the drying container or
The compressed air drying device according to claim 1, wherein a concave portion or a convex portion engaging with the concave portion is formed .