JPS64991Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a compressed air drying device used in a pneumatic circuit such as an air brake device for a vehicle.

(Prior Art) Various products of this type have been proposed in the past, but because they use this desiccant, even if the desiccant is appropriately regenerated and utilized, its drying ability is reduced. If this occurs, the desiccant must be replaced with a new one.

When replacing this, there is a lot of extra work not only in separating the container containing the desiccant and its lid, but also in removing the piping connected to the container or lid.
There is a problem in that the replacement work takes a lot of time and effort.

On the other hand, when recycling the desiccant as described above, a portion of the compressed air dried by the desiccant may be stored and used for recycling in a purge reservoir with a predetermined volume. In this case, if the purge reservoir is integrated with the desiccant container and made relatively long, or if it is installed separately at a designated location, it would take a lot of effort and installation space. and requires.

(Problem to be solved by the invention) This invention was made taking into account the above points, and its basic purpose is to be able to replace the desiccant without removing the piping system. Moreover, it is an object of the present invention to provide a compressed air drying device that can reduce the installation space even though the regeneration air storage portion is integrated with the desiccant storage portion.

Another object of this invention is to provide a compressed air drying device in which the desiccant storage portion is made into a cartridge and the unit can be replaced.

Furthermore, another object of this invention is to provide a compressed air drying device in which the sealing performance of the seal portion is not impaired even when subjected to vibrations when a vehicle or the like travels.

Other objectives and novel features of this invention are:
It will become clear from the description of this specification and the accompanying drawings.

(Summary of the invention) In this invention, as shown in the attached diagram corresponding to the embodiment, the piping system is assembled on the board 2 itself which can be used as a mounting base, and a part for storing the desiccant 29 is provided on one side of the board 2. First cylindrical body 21 to be formed
A second cylindrical body 22 is arranged concentrically with the first cylindrical body 21 as an inner wall and the second cylindrical body 22 as an outer wall to form a space 28 for storing compressed air for regeneration. Since the second cylindrical body 22 covers the outer periphery of the first cylindrical body 21, there is a space 28 with sufficient capacity between the two cylindrical bodies 21 and 22 (that is, a space for storing compressed air for regeneration). ), and furthermore, the inner periphery containing the desiccant 29 can be easily converted into a cartridge.

In particular, both the first and second cylindrical bodies 21, 22
each have an outwardly facing mounting portion 212, 222 such that they can be mounted directly to one side of the substrate 2 by separate mountings 25, 26. Therefore, both cylindrical bodies 21 and 22 are firmly attached, and even when receiving vibrations during running of a vehicle or the like, or a relatively high pressure signal for opening the drain valve 15, the substrate 2. Sealing performance on one surface is not impaired. Furthermore, since the separate mounting portions 212 and 222 are provided, the height of the corresponding mounting surface on one side of the substrate 2 can be freely selected, and therefore the volume of the storage space 28 for compressed air for regeneration can be increased. can be changed as appropriate,
Alternatively, a structure advantageous in positioning the cylindrical bodies 21 and 22 with respect to the substrate 2 can be easily obtained.

(Example) A thick substrate 2 is provided at the bottom of the compressed air drying device 1 . This board 2 serves as a mounting base for installing the device 1 itself, and a first and second cylindrical body 2 to be described later.
It functions as a lid that closes each opening of 1 and 22, and a connector for each piping system.

On one side of the substrate 2 there is an inlet 3 connected to the outlet of an air compressor (not shown), and on the other side there is an outlet 4 connected to a main reservoir (not shown). Since these connections are made through piping, screw holes 3a and 4a are provided at each of the inlet 3 and outlet 4 for piping connection. In this case, the screw hole 3a on the inlet 3 side is machined directly into the board 2 itself, whereas the screw hole 4a on the outlet 4 side
is provided on the side of the pipe joint 5 which is screwed to the substrate 2. This is because a check valve 6 is provided at the outlet 4 to prevent backflow from the main reservoir side. The check valve 6 includes a valve seat 6a provided on the substrate 2 side and a plate-shaped valve body 6b.
and a valve spring 6c located on the back surface of the valve body 6b. The outer circumferential passage 7 of the valve body 6b is for reducing flow resistance when the valve is open.

Incidentally, the inlet 3 and outlet 4 communicate with the upper surface of the substrate 2 via passages 8 and 9 that follow them. While the bottom side of the substrate 2 is flat,
On the top surface of the substrate 2, there are 3
Two pedestals 11, 12, and 13 are provided concentrically. The three pedestals 11, 12, and 13 have lower heights and wider widths as they are located on the outer side. Each opening 8a on the upper surface of the substrate 2,
9a, the opening 8a communicating with the inlet 3 is located in the innermost part of the pedestal 11, and the opening 9a communicating with the outlet 4
a is located on the outside of the pedestal 12. Further, one opening 14a communicating with the drain valve 15 via the passage 14 is located in the innermost pedestal 11. The other opening 14b communicates with the drain valve
Of course, it faces the central recess 10.

The drain valve 15 is installed in a passage 16 that runs vertically through the center of the substrate 2 and opens toward the bottom surface of the substrate. The drain valve 15 serves both as a drain discharge valve and as an open valve to the outside air during the desiccant regeneration cycle. The valve portion of this drain valve 15 includes a valve member 15a made of an elastic material and a tapered valve seat 15.
b. It is the control piston 17 that drives the valve member 15a. The control piston 17 is slidably fitted within the plug 18;
The pressure receiving portion 17a at the upper end receives a pressure signal from a pressure governor (not shown) through a control port (not shown). The control piston 17 is pushed upward by the biasing force of the spring 19 when it does not receive a pressure signal, but when it receives a pressure signal from the pressure governor, the piston moves downward. Due to these actions, the drain valve 15 is opened and closed. Here, a pressure chamber 161 that receives a pressure signal from the pressure governor is defined at the bottom of a hole 16a with one end closed, which is formed in the substrate 2 itself. Therefore, the pressure chamber 161 is completely independent from each side of the inlet 3 and outlet 4. Therefore, even if a pressure signal with a relatively high pressure value (for example, 8 kg/cm ² which is the upper limit regulation pressure of the pressure governor) is applied to the pressure chamber 161, the pressure signal of the pressure chamber 161, the inlet 3 and the outlet 4 Communication between the two sides is reliably prevented. Therefore,
The opening operation of the drain valve 15 is effectively performed, and the drain is effectively discharged and the desiccant 29 is regenerated. Note that the tube 20 protruding from the bottom surface of the substrate 2
is an exhaust pipe for guiding drain and compressed air to the outside.

Next, regarding the upper part of the substrate 2, a first cylindrical body 21 and a second cylindrical body 22 are arranged on the upper part of the substrate 2.
is installed. Both cylindrical bodies 21 and 22 are containers with closed upper ends and openings 211 and 221 at the lower ends, and outward flanges 212 and 222 that form attachment parts for attachment to the upper surface of the substrate 2 are provided at the lower ends with the openings. are provided for each. The inner diameter of the first cylindrical body 21 is the same as that of the innermost pedestal 11.
The inner diameter of the second cylindrical body 22 is approximately equal to the outer diameter of the pedestal 12 located one outside, and the height of each cylindrical body 21, 22 is accordingly set to be approximately equal to the outer diameter of the second cylindrical body 22. The cylindrical body 22 is the first cylindrical body 21
is set larger than . Both cylindrical bodies 2
1, 22, each outward flange 212, 222 is placed on the pedestal 12, 13, and the seal ring 23,
It is airtightly mounted on the substrate 2 via the mounting bolts 25 and 26 via the mounting bolts 24 .
In this case, the stepped portions at the inner ends of the respective pedestals 12 and 13 define their positions, and both the cylindrical bodies 21 and 22 are arranged concentrically around the center of the substrate 2. Furthermore, since the attachment portions 212 and 222 face outward, each of the cylindrical bodies 21 and 22 is firmly supported. Therefore, board 2
The openings 211, 221 of both the cylindrical bodies 21, 22 themselves
A housing space is provided inside the first cylindrical body 21 and separated between the outer periphery of the first cylindrical body 21 and the inner periphery of the second cylindrical body 22. 27 and 28 are formed. In this case, the radial width of the outer peripheral side accommodation space 28 between the first cylindrical body 21 and the second cylindrical body 22 is approximately the same as the inner diameter of the first cylindrical body 21, or at least 1/2 thereof. Since the size is set to be larger than the average size, the outer peripheral side accommodation space 28
has a larger capacity than the accommodation space 27 on the inner peripheral side.

In this invention, compressed air for regeneration is stored in the outer storage space 28 having a larger capacity, and a desiccant 29 is stored in the inner storage space 27 inside the outer storage space 28. Inside the first cylindrical body 21 which is a storage space for the desiccant 29, an oil filter 30 is provided at a lower portion facing the upper surface of the substrate 2, and the desiccant 29 is provided above the oil filter 30. oil filter 3
0 consists of a support container 31 having a bolt through hole 311 at the center and a number of holes 312 at the bottom, and a filter element 32 mounted inside the support container 31. A porous partition plate 33 is installed above the oil filter 30, and a large number of granular desiccant agents 29 are filled thereon. A porous partition plate 34 is also installed above the filled desiccant 29, and the upper part of the partition plate 34 is fitted with a spring 35.
It is held down by a holder to prevent it from swinging. Note that the oil filter 30 is suspended and supported by a bolt 36 passing through the center.

Further, the space 28 on the outer circumferential side, which is a storage space for compressed air for regeneration, is connected to the outlet 4 side through a hole 37 provided in the flange portion and a passage 9 following the hole 37 on the one hand, and on the other hand, the space 28 on the outer peripheral side is a storage space for compressed air for regeneration. It communicates with the upper space 39 of the desiccant 29 through a passage 38 provided on the closed end side of the desiccant 21 . The passage 38 is a boss part 40
A check valve 4 consisting of a ball 411 and a tapered valve seat 412 is installed in the middle thereof.
1 and a perforated plate 42 that prevents the ball 411 from flying out. The check valve 41 has a forward direction extending from the inside of the first cylindrical body 21 containing the desiccant 29 to the outside space 28 . Note that since the throttle passage 43 is provided in parallel with the passage 38, both sides of the check valve 41 are always in communication.

Next, the operation of the compressed air drying device 1 described above will be explained.

When the air compressor is operated under load, moist compressed air is supplied to the lower part of the first cylindrical body 21 through the inlet 3 and the passage 8. Compressor oil and dust are removed from this compressed air by the oil filter 30, and then it is dehumidified by the desiccant 29, and becomes dry compressed air.The check valve 41 is opened from the upper space 39, and the outer space is 28. A part of the dry compressed air that has flowed into the space 28 is stored in the space 28 for regeneration, and the rest is stored in the hole 3.
7, the passage 9, the check valve 6, and the piping leading to the outlet 4 to be stored in the main reservoir. The dry compressed air in the main reservoir is supplied to various devices (not shown) in the air brake system, for example.

When the air pressure in the main reservoir reaches a predetermined value, for example 8 kg/cm ² , the air compressor is put into no-load operation by the action of the pressure governor, and
A pressure signal is applied to the control piston 17 of the drain valve 15. As a result, as described above, the drain valve 15 opens, opening the inside of the first cylindrical body 21 to the atmosphere. Then, the dry compressed air in the outer space 28 passes through the throttle passage 43 and enters the first cylindrical body 21.
The desiccant 2 is transported back into the interior of the
9 is regenerated by removing the trapped moisture.

If these cycles of regeneration and compression are repeated, the drying ability of the desiccant 29 will eventually decrease. Therefore, the desiccant 29 should be replaced at an appropriate time. When replacing the desiccant 29, it is first necessary to release the compressed air stored in the space 28 on the outer peripheral side to lower the internal pressure. This can be done through a control port providing a signal to the drain valve 15 and the subsequent piping system, or by releasing compressed air in the main reservoir.

After releasing the compressed air, each mounting bolt 26, 25
By removing them, the second cylindrical body 22 and the first cylindrical body 21 can be successively removed, and the desiccant 29 and oil filter 30 can be replaced with new ones. In this case, the first
The entire cylindrical body 21 may be replaced as a unit. The desiccant etc. is placed inside the first cylindrical body 21.
Since the first cylindrical body 21 is housed inside the second cylindrical body 22, the first cylindrical body 21 can be handled independently of the second cylindrical body 22,
The first cylindrical body 21 can be easily converted into a cartridge. Considering only the technical concept of consolidating the piping system in the part of the board 2, it is possible to reverse the housing spaces 27 and 28 for the desiccant etc. and compressed air for regeneration, but in that case, the desiccant It is extremely difficult to convert the surrounding area into cartridges.

Furthermore, since the first cylindrical body 21 and the second cylindrical body 22 are each attached to the substrate 2 separately, it is possible to remove both cylindrical bodies 21 and 22 and attach them again. Even if both cylindrical bodies 2
It is sufficient to pay attention to the sealing of only the mounting portions 1 and 22. Of course, if the first cylindrical body 21 is seriously damaged by an external force such as a flying stone, it is possible to remove only the first cylindrical body 21 and replace it with a new one. There is no adverse effect on the sealing performance on the side of the cylindrical body 22 of No. 2.

This invention has been explained above based on examples, but
It goes without saying that this invention is not limited to the embodiments described above, and can be modified in various ways without departing from the gist thereof. For example, the first and second cylindrical bodies 21 and 22 can be attached by screw rings, or if the first cylindrical body 21 is made into a cartridge, the support container 31 can be attached to the first cylindrical body 21, 22. By spot welding to the inner circumference of the cylindrical body 21, the bolt 36 can be omitted.

(Effects of the invention) According to this invention, since the piping system is assembled on the board 2 itself, the desiccant 29 can be replaced without removing the piping system, and the desiccant 29 can be replaced. A second cylindrical body 22, which is one size larger than the first cylindrical body 21, is installed on the outer circumferential side of the first cylindrical body 21, which forms a storage space of 29, and both cylindrical bodies 2
Since compressed air for regeneration is stored between 1 and 22, a sufficient amount of air for regeneration can be stored despite the small installation space.
Moreover, an excellent effect can be obtained in that the desiccant 29 can be replaced even more easily.

Particularly, in this invention, since the first and second cylindrical bodies 21 and 22 are separately attached to the substrate 2 using outward mounting portions 212 and 222, each cylindrical body 21, The mounting strength of the drain valve 22 can be made sufficient, and even when receiving vibrations from running a vehicle or a relatively high pressure signal for opening the drain valve 15,
The seal around the mounting part can be ensured. Furthermore, separate mounting portions 212, 222
Therefore, each mounting height on one surface of the substrate 2 can be freely selected, and furthermore, one surface of the substrate 2 can be processed relatively freely. The degree of freedom in designing one side of the board 2 is as follows:
Practical effects of obtaining a configuration that facilitates positioning of the respective cylindrical bodies 21 and 22, or increasing the amount of air for regeneration by providing a recessed portion on one surface of the substrate 2, for example. also occurs.

[Brief explanation of the drawing]

The drawing is a sectional view showing an embodiment of this invention. 1...Compressed air drying device, 2...Substrate, 3...Inlet,
4... Outlet, 15... Drain valve, 21... First cylindrical body, 22... Second cylindrical body, 211, 221... Opening, 212, 222... Outward mounting portion, 27...
Accommodation space for desiccant, 28... Accommodation space for compressed air for reproduction, 29... Desiccant, 30... Oil filter, 4
1... Check valve, 43... Throttle passage.

Claims (1)

[Claims for Utility Model Registration] 1. Having its own attachment part facing outward at one end,
and a first cylindrical body containing a desiccant inside;
a second cylindrical body arranged concentrically around the outer periphery of the first cylindrical body, forming a space for storing compressed air between the first cylindrical body and having its own mounting portion facing outward at one end; a cylindrical body, a substrate on one surface of which each attachment part of both the cylindrical bodies is separately attached by another attachment; and a cylindrical body provided on the substrate and connected to the air compressor; an inlet connected to the mounting part side of the desiccant in the cylindrical body; an outlet provided in the substrate and connected to the piping system side and also connected to the space; and a desiccant in the first cylindrical body. A passage that communicates the opposite side of the mounting portion with the space, a check valve provided in the passage that allows movement toward the space but prevents movement toward the space, and both sides of the check valve are always in communication. a throttle passage; a passage provided on the substrate and capable of communicating the mounting portion side of the desiccant to the outside air;
a drain valve provided in the passage and opening and closing the passage in response to a pressure signal from the outside;
Compressed air drying equipment. 2 The passage in which the drain valve is disposed includes a hole with one end closed, which is closed on one side of the substrate to which the first cylindrical body is attached and open to the outside air on the opposite side, and the drain valve is disposed in this hole. A control piston is installed therein, and a pressure chamber receiving the pressure signal is formed at the bottom of the one-end closed hole formed in the substrate itself.
A compressed air drying apparatus according to claim 1 of the utility model registration claim. 3. One surface of the substrate has a pedestal for mounting each attachment part of each of the first and second cylindrical bodies, and each of these pedestals has a step so that the pedestal on the inner circumference side is higher than the pedestal on the outer circumference side. The compressed air drying apparatus according to claim 1 or 2 of the utility model registration claim, which is higher than the above.