JPS6344096Y2 - - Google Patents

Description

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

As this type of air dryer, the one shown in FIG. 1 has been proposed. In the figure,
10 is the U-shaped main body of the air dryer device;
20 is a lid member, and 30 is a drying cylinder. The main body 10 has a cavity 10A for housing the drying cylinder 30, and a large diameter opening 11 for inserting and removing the drying cylinder 30 into the cavity 10A is closed by the lid member 20. This lid member 20 is in the shape of a cap with a flange that includes a fitting opening 21 for receiving the upper end of the drying cylinder 30, and also has an outlet 22 for compressed air. The flange 23 that fits into the opening 11 of the main body 10 and overlaps the end surface of the opening 11 closes the main body 10.
are connected by bolts 28. 25 is a bolt through hole, 26 is a throttle passage, and 27 is a ball valve. 29
A is a sealing member, which is provided to seal between the inner surface of the opening 11, that is, the upper end of the inner wall 12 of the cavity 10A, and the wall 24 of the lid member 20. The upper end of the outer wall 31 is sealed with a sealing member 29b. The drying cylinder 30 has a protrusion 33 protruding from the outer surface of the perforated bottom wall 32 and a plurality of spacer protrusions 34 protruding from the inner surface. A desiccant 36 is filled, and the desiccant 36 receives a downward pressing force from a spring 38 via a perforated pressing plate 37. 40 is an annular filter, which is held in a filter receiver 41 adjacent to the outer surface of the bottom wall 32 of the drying tube 30;
A cup-shaped guide 42 for guiding compressed air to the filter 40 is held between the bottom wall 32 and the filter receiver 41.

The main body 10 has a compressed air outlet 13 in its side wall.
The bottom wall is provided with a control boat 14 opening on the side, a boss portion 16 and a drain valve 17 for forming a control chamber 15 communicating with the control boat 14. An upper portion 1 having a concave cross section protruding into the space 10A of the boss portion 16
The protrusion 33 of the drying cylinder 30 is fitted to 6A,
A plug 50 is fitted into the downwardly opening recess 16B, and the side hole 51 of the plug and the above-mentioned cavity 10 are fitted.
It has a passage 16C communicating with A. plug 5
0 has a hole 52 whose upper and lower parts are large diameter parts, and this hole 5
A control piston 53 is held within the control piston 2. The control piston 53 has a valve member 55 fixed with a bolt 54 at its lower end, and is pushed upward by a spring 56. In this state, the valve member 55 is inserted into the hole 55.
The valve seat 52a is in pressure contact with a valve seat 52a formed at the bottom of the lower large diameter portion of the valve 2. 57 is a discharge tube, and 58 is a retaining ring.

The inlet 13 of the main body 10 is connected to the discharge port 60a of the compressor 60 through a conduit 61, and the outlet 22 is connected to a regeneration air tank 63 through a conduit 62. This regeneration air tank 63 is connected to the main air tank 60 via a pipe 64 and a check valve 65, and the main air tank 66 is equipped with a governor 67 for regulating the internal pressure to a pressure level within a predetermined range. It is connected. The governor 67 sends out an unload air pressure signal when the air pressure in the main air tank 66 reaches the upper limit level, and this air pressure signal is supplied to the unloader 60b of the compressor 60 through line 68 and simultaneously to the control boat 14 through line 69. is input. When the compressor 60 receives the air pressure signal, it enters a no-load operation. This air pressure signal disappears when the internal pressure of the main air tank 66 reaches the lower limit level, and the compressor 60 resumes load operation. The figure shows the state during this load operation.

When the compressor 60 shifts to load operation, moist compressed air sent out from the discharge port 60a is supplied to the inlet 13 through the pipe line 61. Main body 1
As shown by the arrow, the compressed air that has flowed into the 0 enters the drying cylinder 30 through the flow path F and the oil filter 40, where it is dried and becomes dry compressed air.
The air flows from the outlet 22 through the pipe line 62 into the regeneration air tank 63 . This dry compressed air further passes through a pipe 64 and a check valve 65 to the main air tank 66.
It can be stored in a small place. The dry compressed air stored in the main air tank 66 is supplied to various devices (not shown) in the air brake system, for example.
When the aforementioned unload air pressure signal is generated and input to the control boat 14, the air pressure acts on the control piston 53, causing the control piston 53 to compress the spring 56 and move downward. Along with this, the valve member 55 is separated from the valve seat 52a, and the cavity 10A of the main body 10 is replaced by the passage 16C,
It is communicated with the outside air through the side hole 51 and hole 52. As a result, the dry compressed air in the regeneration air tank 63 flows back into the drying cylinder 30 through the outlet 22, the throttle passage 26, and the pressing plate 37, and the condensed water adhering to the surface of the desiccant 36 is removed from the bottom. It is discharged from the wall 32 to the atmosphere through the oil filter 40 and the drain valve 17,
The desiccant 36 is regenerated.

This is how compressed air is dried,
As described above, the sealing between the inner wall 12 of the cavity 10A of the main body 10 and the upper end of the outer wall 31 of the drying cylinder 30 against the outside air is performed between the outer surface of the wall 24 of the lid member 20 and the inner wall 12, and the upper end of the outer wall 31 of the drying cylinder 30. Since this is done by sealing members 29a and 29b disposed between the fitting opening 21 of the drying tube 30 and the upper end of the outer wall 31 of the drying tube 30, the inner diameter of the bolt through hole 25 and the outer diameter of the bolt 28 are The lid member 20 and the main body 1 within the range of the difference in diameter.
The center of 0 is shifted in the radial direction, and the outer surface of wall portion 24 and the inner wall 1
There may be cases where the gap length between the two is not uniform over the entire circumference. In particular, a difference tends to occur between the gap length A of the gap on the side that is connected by bolts and the gap length B of the gap on the side that is diametrically separated from the gap and is not connected with bolts, for example, on the inlet 13 side. However, on the side where the gap length becomes larger, the interference of the sealing member 29a becomes smaller and the sealing performance deteriorates.

The present invention has been made in order to eliminate the above-mentioned conventional drawbacks, and includes a guide member for positioning the drying tube in the cavity of the main body, a sealing member on the guide member, and a sealing member between the guide member and the lid. By applying pressure between the walls and the wall, it is possible to improve the sealing performance of the above-mentioned space against the outside air compared to the conventional method, and also prevents positional fluctuations of the drying cylinder due to running vibrations, etc., and eliminates the need for sealing members. Preventing large deformation,
An object of the present invention is to provide an air dryer device that can achieve stable performance.

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

In FIG. 2, the same or corresponding parts as those in FIG. 1 are designated by the same reference numerals. In the figure, reference numeral 70 denotes an annular guide member that is fitted into the opening 11 of the main body 10 until it engages with the step surface 11a, and its outer peripheral surface and inner peripheral surface are the inner surface of the opening 11 and the drying cylinder 30, respectively. The drying tube 30 is positioned such that the axis of the drying tube 30 is oriented vertically. 71
is an annular sealing member, and the opening 1 of the main body 10
1 and the upper end of the outer wall 31 of the drying cylinder 30, and is pressed between the lower end surface of the wall 24 of the lid member 20 and the upper surface of the guide member 70. Its inner and outer circumferential surfaces are in pressure contact with the inner surface of the opening 11 and the outer wall 31 of the drying cylinder 30, respectively. Note that the wall portion 24 of the lid member 20 is shorter than that shown in FIG. 1 in order to clamp the seal member 71 between it and the guide member 70.

Since the function and operation of this air dryer device is the same as that described with reference to FIG. 1, the explanation thereof will be omitted.

In this embodiment, since the guide member 70 extends between the outer surface of the upper end of the drying tube 30 and the inner surface of the opening 11 of the main body 10, the radial position of the upper end of the drying tube 30 is uniquely determined. Therefore, the circumferential gap between the inner surface of the opening 11 and the outer surface of the upper end of the drying tube 30 is constant over the entire circumference. Therefore, the tightening margin of the seal member 71 fitted into this circumferential gap becomes uniform over its entire circumference.

Furthermore, as described above, the radial position of the upper end of the drying tube 30 is positioned at a predetermined position by the guide member 70 and the drying tube 30 does not swing, so when attaching the lid member 20, the fitting opening 21 and the drying tube The fitting with the upper part of 30 can be carried out smoothly without any sluggishness. In addition, the lower end of the drying tube 30 also
By fitting and positioning the drying tube 30 with the bottom of the main body 10, the drying tube 30 is positioned at two points, the upper end and the lower end. It is possible to prevent the sealing member 71 from receiving an excessive compressive force at the extreme part due to the displacement of the drying tube 30, and from reducing its durability. Also in the assembly work, the positioning work of the drying cylinder 30 can be performed accurately and easily.

Note that the guide member 70 does not have to engage the outer wall 31 of the drying tube 30 and the inner surface of the opening 11 of the main body 10 over the entire circumference of the inner and outer circumferential surfaces of the guide member 70. As long as it has a shape that allows positioning, it may be engaged at part of the inner and outer peripheries.

As described above, according to the present invention, the guide member that engages with the stepped portion of the main body and the drying cylinder are fitted together, and the sealing member is compressed between the guide member and the wall of the lid member, so that the drying cylinder is The tube is positioned in the cavity of the main body so as not to be able to swing, and a constant circumferential gap is passed between it and the inner wall of the main body over the entire circumference, and the sealing member is interposed within this circumferential gap, so that the sealing member As a result, the drying tube inserted into the main body exhibits a uniform sealing effect over the entire inner and outer circumference, and the sealing performance of the void space of the main body against the outside air can be improved compared to the conventional method. Since the lid member is positioned as shown in FIG.

In particular, with the present invention, the position of the drying tube is determined at the upper and lower ends of the drying tube, so the position of the drying tube within the main body can be determined reliably, and there is no need for a sealing member. It is possible to prevent large deformation and achieve stable performance.

[Brief explanation of the drawing]

FIG. 1 is a sectional view including the piping system of a conventional air dryer device, and FIG. 2 is a sectional view including the piping system of an embodiment of the air dryer device according to the present invention. 10...Main body, 10A...Vacancy, 11...Opening, 11a...Step surface, 12...Inner wall, 13...
Inlet, 14... Outlet, 36... Desiccant, 20...
Lid member, 24... Wall portion, 30... Drying cylinder, 31...
...Outer wall, 70...Guide member, 71...Seal member.

Claims (1)

[Scope of utility model registration request] a bottomed cylindrical main body having an opening formed through a step in the upper part; a lid member attached to the main body that covers the opening of the main body; and a cylindrical body formed on the lid member and fitted into the opening. a wall portion, a drying tube whose upper end fits inside the wall portion and whose lower end is supported by the bottom of the main body, a desiccant housed inside the drying tube, and one end side of the desiccant agent. an air dryer device having an inlet connected to the main body and an outlet connected to the other end of the desiccant and formed in the lid member;
an annular guide member that fits onto the drying tube and positions the upper end of the drying tube with respect to the main body;
An annular sealing member is provided between the guide member and the wall of the lid member to seal between the lid member and the drying cylinder and between the lid member and the main body, and This air dryer device is provided with protrusions that fit into the bottom of the main body and the lower end of the drying cylinder to position the lower end of the drying cylinder.