JPS6323947Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an air dryer device used for drying compressed air.

In a pneumatic system, if condensed water is contained in the compressed air discharged from a compressor, rust will occur in each device in the system, leading to deterioration of the devices and causing problems such as reduced functionality. In particular, if condensed water is contained in the compressed air in a vehicle's air brake system, this condensed water will freeze inside each device in cold weather, and as a result, each device will become inoperable and the vehicle will not be able to brake. There is a risk.

Therefore, conventionally, for example, an air dryer device in which a sealing member is interposed between the bottom wall of a drying cylinder filled with a desiccant and a holding member for holding a filter member is used to connect the compressor and the main tank. It is installed in the pneumatic system so that the compressed air discharged from the compressor is dried with a desiccant and sent to the main tank.

However, the sealing member in the above air dryer device is, for example, a leather packing and has a flat annular shape, and is placed at a predetermined position on the flat surface of the holding member for holding the filter member.
Furthermore, a drying cylinder filled with a desiccant is mounted on the holding member in a positioned manner, but during this mounting, the sealing member may be displaced from a predetermined position. If the drying cylinder is attached to the holding member in a misaligned manner, the sealing member may not perform its original sealing action. For this reason, the assembly work of the above-mentioned conventional air dryer device was quite difficult.

The present invention has been made in view of the above problems, and has an object to provide an air dryer apparatus which can improve the working efficiency and the quality compared to the conventional apparatus. According to the present invention, this object is achieved by an air dryer apparatus in which a sealing member is interposed between a bottom wall of a drying tube filled with a desiccant and a holding member for holding a filter member, the sealing member having a plate-like portion which is clamped between the bottom wall of the drying tube and the holding member, and a thick portion which engages with a step formed in the holding member, and the drying tube is elastically supported on the holding member with the plate-like portion of the sealing member interposed therebetween.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a sectional view including a piping system of an air dryer according to an embodiment of the present invention. An inlet 5 communicating with the inner hole 4 is provided on the upper side periphery of the main body 2 . At the bottom of the main body 2, a drain valve main body 7 of the drain valve 6 is integrally formed with the main body 2. On the other hand, a lid member 8 covering the inner hole 4 of the main body 2 is attached to the upper part of the main body 2 by fitting the fitting protrusion 9 into the opening 3. An outer seal ring 10 attached to the fitting protrusion 9 maintains airtightness between the inside of the inner hole 4 and the atmosphere. The lid member 8 and the main body 2 are integrally fixed to each other by a plurality of bolts 12 at their flange portions.

A boss portion 13 is formed in the center of the upper surface of the lid member 8, and the boss portion 13 has a pipe connection port 15 having a passage 14 therein communicating with the inside of the main body 2.
is provided. A valve seat 18 is formed in the passage 14, and a ball valve member 19 that can be seated on the valve seat 18 is arranged. This constitutes a check valve 20 that allows air to flow in only one direction. Further, the passage 14 is provided with a throttle passage 21 that bypasses the check valve 20 and constantly communicates the inside of the main body 2 with the connection port 15. The stop plate 11 press-fitted into the pilot hole of the pipe thread 61 formed in the pipe connection port 15 has a large number of holes, and prevents the ball valve member 19 from coming out of the passage 14.

The above-mentioned pipe connection port 15 is connected to the regeneration tank member 17 via a pipe line 16, while the inlet port 5 is connected to the discharge port 24 of the compressor 23 by a pipe line 22, and the discharge port of the regeneration tank 17 is connected to the regeneration tank member 17 via a pipe line 16. It is connected to the main tank 27 through a passage 25 and a check valve 26. A governor 28 connected to the main tank 27 adjusts the air pressure inside the main tank 27 to, for example, 7 to 8 kg/cm ^{2 .}
This governor is connected to an unloader 30 provided in the compressor 23 through a pipe 29, and is connected to a control port 32 of the drain valve 6 through a pipe 31. It is connected.

A drying cylinder 34 that is inserted into the inner hole 4 from the opening 3 of the main body 2 and whose upper outer periphery fits into the recess 33 of the lid member 8.
A plurality of openings are formed at the bottom, a plurality of protrusions 35 are formed on the inner surface, and a positioning protrusion 36 is formed at the center of the outer surface of the bottom. The positioning protrusion 36 of the drying cylinder 34 is located in a hole 38 formed in the boss portion 37 of the drain valve body 7.
It is positioned relative to the main body 2 by being fitted into the main body 2. Inside the drying cylinder 34, a pair of upper and lower partition walls 39 and 40, an enlarged view of which is shown in FIG. Chamber 47 filled with 48
are divided.

The pair of partition walls 39 and 40 have the same configuration,
As clearly shown in FIG. 3, the lower partition wall 40 is arranged symmetrically in the upper and lower directions, but now the lower partition wall 40 will be explained with reference to FIG. 2.
1. It consists of a partition plate 42 having a large number of holes and a clamping band 43 for clamping these. The clamping band 43 is made of rubber, and has a pair of flange parts 44 and 45 that protrude in the inner diameter direction, and an outer flange part 46 that protrudes in the outer diameter direction on the same plane as the upper flange part 45. ing.
The filter cloth 41 is superimposed on the partition plate 42, and their peripheral edges are elastically clamped by a pair of inner flanges 44, 45 of a clamping band 43. The lower inner flange portion 44 is formed to be slightly thicker than the upper inner flange portion 45, and the tip of the upper inner flange portion 45 is slightly bulged downward. The peripheral edge of the partition plate 42 is received by the lower inner flange 44, and the peripheral edge of the filter cloth 41 superimposed on the partition plate 42 is pressed by the tip of the upper inner flange 45. As a result, the partition plate 42 and the filter cloth 41 are fixed to each other.

When the air dryer device 1 is assembled, the lower partition wall 40 configured as described above is provided with a filter cloth 4.
1 is inserted into the drying tube 34 with 1 facing upward. At this time, as shown in FIG. 3, the outer flange portion 46 of the clamping band 43 is bent upward along the inner surface of the drying tube 34. In this state, the partition wall 40
is slid downward and is received by a protrusion 35 at the bottom of the drying tube 34. Next, a predetermined amount of desiccant 48 is filled into the drying tube 34, and the upper partition wall 39 is inserted into the drying tube 34 with the filter cloth 41 facing downward as shown in FIG. In this case as well, the outer flange portion 46' of the clamping band 43' is attached to the drying tube 3.
Bend upward along the inner surface of 4.

The drying tube 34 filled with the desiccant 48 as described above is inserted into the main body 2, and the positioning protrusion 36 is fitted into the hole 38 of the boss portion 37, so that the drying tube 34 is positioned with respect to the main body 2. When the spring 49 is interposed between the upper partition wall 39 and the lid member 8, and the lid member 8 is fixed to the main body 2 with the bolts 12, the desiccant 48 in the chamber 47 of the drying tube 34 passes through the upper partition wall 39. and placed in a compressed state. In addition,
A seal ring 59 is interposed between the upper end of the drying cylinder 34 and the lid member 8.

The filter section 50 located below the drying tube 34 is incorporated into the main body 2 before the drying tube 34, and this filter section 50 will be explained next.

The filter section 50 consists of an annular upper holding member 52, a cone-shaped lower holding member 53, and an annular oil filter 54 held by these.
A filter portion 50 is disposed within the main body 2 so as to be aligned with the hole 38 of
A sealing member 51 whose details are shown in FIG. 4 is interposed between the drying tube 34 and the filter section 50.

The sealing member 51 is made of rubber, has an annular shape, and has a peripheral wall portion 55 and a pair of ring-shaped protrusions 56,5.
7 are integrally formed. Lower surface 5 of sealing member 51
8 has a shape that almost matches the outer surface shape of the upper peripheral edge 52a of the upper holding member 52 of the filter section 50, and when the sealing member 51 is set on the upper holding member 52, the peripheral edge 55 of the sealing member 51 is The sealing member 51 is engaged with the peripheral edge 52 a of the upper holding member 52 , thereby positioning the sealing member 51 with respect to the upper holding member 52 , that is, the filter portion 50 . Next, as described above, by inserting the drying cylinder 34 into the main body 2 and fixing the lid member 8 to the main body 2 with the bolts 12 via the spring 49, the drying cylinder filled with the desiccant 48 is combined with the pressing force of the spring 49. The ring-shaped protrusions 56 and 57 of the sealing member 51 interposed between the drying cylinder 34 and the filter section 50 are crushed by the weight of the drying tube 34, thereby ensuring the sealing action of the main member 51. A passage 62 formed by the main body 2 and the drying tube 34 communicates with the inlet 5 on the one hand, and on the other hand, the passage 14 having the oil filter 54, the chamber 47, the check valve 20, and the throttle passage 21, and piping. Regeneration tank 17 via connection port 15 pipe line 16
communicate with.

On the other hand, the drain valve 6 has a hole 63 in the drain valve body 7.
The hole 63 communicates with the control port 32 via a passage 64 and communicates with the inside of the main body 2 via a passage 65. The plug 60 inserted into the hole 63 has a hole 66 and a hole 67 formed therein, and a control piston 68 is slidably disposed within the hole 66 .
A discharge valve seat 69 is formed in the upper part of the hole 67, and the lower part of the hole 67 is open to the atmosphere. A chamber 70 within the bore 63 defined by the plug 60 and the control piston 68 communicates with the control port 32 via a passage 64 . A valve member 71 made of an elastic material is fixed to the lower end of the control piston 68 with a bolt 73 via a stopper 72, and the valve member 71 cooperates with a discharge valve seat 69 to connect the inside of the main body 2 to the atmosphere. Control communication. Hole 66 formed by control piston 68
Inner chamber 74 communicates with passageway 65 by cutout passageway 75 and passageway 76 . A spring 77 tensioned within the chamber 74 constantly urges the control piston 68 upward. The plug 65 is prevented from coming off via a discharge pipe 78 by a retaining ring 79. 80,81
and 82 are seal rings.

Next, the operation of this embodiment will be explained.

Assuming that the compressor 23 is currently being operated under load, moist compressed air sent out from the discharge port 24 is supplied to the inflow port 5 through the pipe line 22. This compressed air is further passed through a passage 62 and an oil filter 5.
4 to chamber 47 where desiccant 48
The dry compressed air is then stored in the regeneration tank 17 through the passage 14 and piping connection port 15 by opening the check valve 20. This dry compressed air is further stored in the main tank 27 from the outlet of the regeneration tank through a line 25 and a check valve 26.
The dry compressed air stored in the main tank 27 is supplied to various devices (not shown) in the air brake system, for example, as shown by arrows.

When the air pressure in the main tank 27 reaches a predetermined value, for example 8 kg/cm ² , the governor 28 supplies an unload air pressure signal to the unloader 30 to put the compressor 23 into no-load operation, and also sends this air pressure signal to the drain valve. 6 control port 32. The signal pressure from the governor 28 supplied to the control port 32 is introduced into the chamber 70, and this air pressure acts on the control piston 68, causing the control piston 68 to spring 77.
Compress and move it down the diagram. As the control piston 68 moves downward, the valve member 7
1 is removed from the discharge valve seat 69, the interior of the main body 2 is communicated with the atmosphere through the passage 65 and the passage 76. Then, the dry compressed air in the regeneration tank 17 passes through the pipe connection port 15 and the throttle passage 21 and enters the chamber 4.
The condensed water that is returned to the desiccant 7 and adhered to the surface of the desiccant 48 is discharged to the atmosphere through the filter 54, the passage 65, and the passage 76, and the desiccant 48 is regenerated.

The compressed air in the main tank 27 is consumed by each device in the air brake system, and when the air pressure in the main tank 27 drops below, for example, 7 kg/cm ² , the governor 2
8 stops sending the air pressure signal to the unloader 30, puts the compressor 23 into load operation again, and releases the signal pressure supplied to the drain valve 6 to the atmosphere to make the air pressure in the pipe line 31 zero. Then, the control piston 68 is pressed by the spring 77 and moves upward in the figure, causing the valve member 71 to move toward the discharge valve seat 69.
When the user is seated on the main body 2, communication between the inside of the main body 2 and the atmosphere is cut off. Thereafter, by repeating the above series of operations, dry compressed air whose pressure is regulated within a predetermined pressure range is constantly stored in the main tank 27.

The embodiment of the present invention is constructed and operates as described above, and has the following effects.

That is, the upper and lower partition walls 39, 4 in the drying cylinder 34
0 consists of a filter cloth 41, a partition plate 42, and a clamping band 43, respectively.
Since they are fixed to each other simply by sandwiching their peripheral edges, the fixing work is extremely simple compared to the conventional method of applying adhesive. There is no risk of quality deterioration due to adhesive extrusion.

Also, as shown in FIG. 3, partition walls 39, 40
When inserting into the drying cylinder 34, the clamping band 43
The outer flange portions 46, 46' are bent upward and slid onto the inner wall surface of the drying tube 34, which is easier to insert into the drying tube 34 than with a conventional partition wall. That is, the partition walls 39 and 40 are connected to the drying cylinder 34.
Although it is not necessary to provide an airtight seal to the inner wall of the container, it is necessary to provide a slidable seal to prevent the desiccant 48 from leaking outside. For this reason, in the conventional partition wall, considerable precision was required in the value of the diameter, but in this embodiment, the clamping band 43
Since the outer flange portion 46 is bent, elastically comes into close contact with the inner wall of the drying cylinder 34, and is slidable against the inner wall, the diameter of the clamping band 43 does not require very high precision. Therefore, the processing of the partition wall of this embodiment is simpler than that of the conventional partition wall, and moreover, it is easier to set it in the drying cylinder.

Further, a sealing member must be interposed between the drying cylinder 34 and the filter section 50, but conventionally, a flat ring-shaped leather packing is used as the upper holding member 52.
Since it was only placed on the top surface, it sometimes moved when the drying cylinder was set on top of it, which made it difficult to accurately position the skin packing and assemble the device. In the example, simply engaging the sealing member 51 with the upper holding member 52 ensures accurate positioning at all times, which facilitates assembly of the device.

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 idea of the present invention.

For example, in the above embodiment, the sealing member 51 is made of rubber, but it may be made of any material as long as it has sealing properties. For example, it may be leather.

Furthermore, although the inner circumferential wall surface 58 on which the sealing member 51 engages with the upper holding member 52 is formed continuously, it may be discontinuous. Further, instead of the illustrated shape, the upper holding member 52 may be provided with a protrusion on the inner surface and a recess that can be engaged with the protrusion.

As described above, in the air dryer according to the present invention, the sealing member has an engaging portion that can engage with at least a part of the outer shape of the holding member, so that its positioning is easy. , it is possible to improve assembly work efficiency and improve quality compared to conventional methods. In addition, it is not only easy to position, but also has the effect of absorbing the vibration force when the vehicle is running with its plate-like part, and eliminating various problems caused by rattling of the drying cylinder and other parts. It is.

[Brief explanation of the drawing]

1 is a sectional view including the piping system of an air dryer device showing an embodiment of the present invention, FIG. 2 is an enlarged side sectional view of the lower partition wall of the air dryer device shown in FIG. 1, and FIG. 3 is a sectional view of the air dryer device shown in FIG. FIG. 4 is an enlarged side sectional view of essential parts of a pair of partition walls incorporated in the air dryer shown in FIG. 1, and FIG. 4 is an enlarged side sectional view of a sealing member in the air dryer shown in FIG. In the figure, 1... air dryer device,
34...Drying barrel, 50...Filter section, 51...
Sealing member, 52... Upper holding member, 54... Oil filter, 55... Peripheral wall portion, 58... Inner peripheral wall surface, 48... Desiccant.

Claims (1)

[Scope of utility model registration request] In an air dryer device in which a sealing member is interposed between a bottom wall of a drying cylinder filled with a desiccant and a holding member for holding a filter member, the sealing member is connected to a bottom wall of the drying cylinder; The drying tube has a plate-like part that is clamped between the holding member and a thick walled part that engages with a stepped part formed on the holding member, and the drying cylinder has a plate of the sealing member on the holding member. An air dryer device characterized in that it is elastically supported with a shaped portion interposed therebetween.