JP5666256B2 - Air dryer - Google Patents

Description

  The present invention relates to an air dryer for drying compressed air that is a working source of an air device.

In general, a large vehicle such as a truck or a bus employs an air type brake device using compressed air as a working fluid for operating a brake chamber. In this type of brake device, compressed air discharged from an air compressor is used. It is configured to store in the air tank and supply the compressed air in the air tank to each brake chamber as necessary. Between the air compressor and the air tank, the moisture of the compressed air is absorbed and dried. An air dryer is provided.
Conventionally, this type of air dryer includes a support base including an inlet for receiving compressed air to be dried and an outlet for delivering processed compressed air that has been dried, and a container supported on the support base. The desiccant is contained in the desiccant container and the compressed air from the inlet can be dried through the desiccant. The support base surrounds the outside of the desiccant container and stores the compressed air between the desiccant container. A thing provided with the outside cover which divides a room is proposed (for example, refer to patent documents 1).

JP 2007-136403 A

By the way, this type of air dryer is generally installed in a narrow space of a vehicle, and this space often varies depending on the vehicle model to be attached. For this reason, the conventional air dryer is designed to design the position of the mounting portion and the inlet of the compressed air that match the mounting position of the vehicle for each vehicle to be mounted, and to form the mounting portion and the inlet on the support base. I was going. For this reason, there existed a problem that the versatility of an air dryer was scarce and also productivity was bad.
Therefore, the present invention has been made in view of the above-described circumstances, and can provide an air dryer that can be attached to various attachment positions with the same configuration, and is improved in versatility and productivity. Objective.

In order to achieve the above object, the present invention includes a support base including an inlet for receiving compressed air to be dried and an outlet for delivering processed compressed air that has been dried, and a container supported on the support base. A desiccant container that contains a desiccant therein and can process the compressed air from the inlet through the desiccant, and surrounds the outside of the desiccant container on the support base. And an outer cover that divides a room for storing compressed air in the air dryer, the support base is oriented in different directions, and is directed in different directions from the first and second attachment surfaces that are selectively attached to the attachment target member. And a plurality of inlets for receiving compressed air.

  According to this configuration, since the support base includes the first and second mounting surfaces that are directed in different directions and the plurality of inlets that receive the compressed air that is directed in different directions, the first and second mounting surfaces are provided. On the other hand, by selecting one of the plurality of inlets, the variation of the combination of the mounting surface and the inlet can be increased, and the air dryer can be easily mounted at various mounting positions with the same configuration. it can. Moreover, since the air dryer of the same structure can be attached with respect to various attachment positions, the versatility and productivity of the air dryer can be improved.

  In this configuration, the first and second mounting surfaces are formed on adjacent surfaces among the side surfaces of the support base, and the plurality of inlets are collectively arranged at corners of the support base that are separated from the mounting surfaces. It is good also as composition which has. According to this configuration, since the first and second mounting surfaces are formed on adjacent surfaces among the side surfaces of the support base, it is possible to mount the support base by simply changing the direction of the support base. In addition, since a plurality of inlets are collectively arranged at the corners of the support base away from the first and second mounting surfaces, the pipe and the mounting surface are attached when connecting the pipes to these inlets. The pipe can be easily connected without interfering with the attachment target.

  Further, the outlet may be disposed on a side surface of the support base facing the first mounting surface, and a wet tank or a protection valve may alternatively be attached to the outlet. According to this configuration, since the outlet for sending the compressed air is provided on a side surface different from the first and second mounting surfaces of the support base, the operation of attaching the device to the outlet can be easily performed. In addition, since a wet tank or protection valve can be selectively attached to this outlet, the equipment to be attached to the outlet can be selected according to the mounting status of the support base and the arrangement status of peripheral devices. Air circuit layout can be realized.

Further, the plurality of inlets may be a plurality of unperforated planned opening portions, and the inlets may be formed by drilling any of the planned opening portions according to the mounting state of the support base. . According to this configuration, it is only necessary to perforate a planned opening portion with respect to an actually used inlet, and accordingly, the work process is reduced and workability is improved. Further, in this configuration, the planned opening portion for the unused inlet is not perforated, so that it is not necessary to close the inlet, and air leakage from the inlet can be reliably prevented.

  According to the present invention, the support base includes the first and second mounting surfaces that are directed in different directions, and the plurality of inlets that receive the compressed air directed in the different directions. On the other hand, by selecting one of the plurality of inlets, the variation of the combination of the mounting surface and the inlet can be increased, and the air dryer can be easily mounted at various mounting positions with the same configuration. it can. Moreover, since the air dryer of the same structure can be attached with respect to various attachment positions, the versatility and productivity of the air dryer can be improved.

It is a circuit diagram which shows the air circuit using the air dryer concerning this embodiment. The external appearance of an air dryer is shown, A is a top view, B is a front view, C is a bottom view. It is III-III sectional drawing of FIG. 2A. It is IV-IV figure of FIG. 2C. The external appearance of an air dryer is shown, A is a rear view, B is a left side view, and C is a right side view. The air dryer is shown in an attachment mode, in which A is a view showing a state of attachment on the back surface of the support base, and B is a view showing a state of being attached on the right side surface of the support base.

DESCRIPTION OF EMBODIMENTS Preferred embodiments according to the present invention will be described below with reference to the drawings.
FIG. 1 is a circuit diagram showing an example of an air circuit using the air dryer according to the present embodiment. The air circuit 1 includes an air dryer 10. An air compressor 3 is connected to an inlet 14 of the air dryer 10, and pressurized air is supplied from the air compressor 3. A protection valve 5 is connected to the outlet 16 of the air dryer 10, and air tanks 6, 7, 8 and 9 are connected to the four exhaust ports of the protection valve 5, respectively. Each of these air tanks 6-9 is connected to each brake circuit (service brake circuit, parking brake circuit) of the vehicle and accessories (horn, clutch drive mechanism, etc.) driven by compressed air. When the compressed air is supplied from ˜9, the brake circuit and accessories are driven. The protection valve 5 is integrally provided with a plurality of pressure protection valves respectively corresponding to the air tanks (brake circuits) 6 to 9, and makes a system including the air tanks 6 to 9 independent. For this reason, when the pressure of the compressed air in any one of the air tanks 6 to 9 decreases (so-called failure), the protection valve 5 closes the pressure protection valve corresponding to the air tank to It functions to protect the air tank (ie brake circuit) that has not fallen.

FIG. 2 is a three-plane view showing the air dryer 10, wherein A is a plan view, B is a front view, and C is a bottom view.
As shown in FIG. 2B, the air dryer 10 includes a support base 12 located at the bottom and a dryer body 13 supported on the support base 12. The support base 12 is a metal molded product made of aluminum or an alloy thereof. In this configuration, the support base 12 is provided with a first inlet 14A and a second inlet 14B that receive compressed air to be dried. The first inlet 14 </ b> A and the second inlet 14 </ b> B communicate with each other in the support base 12 and are provided in the support base 12 in different directions. Specifically, the first inlet 14A is formed on the front surface 120 of the support base 12 as shown in FIGS. 2A and 2B, and the second inlet 14B is on the left side of the support base 12 as shown in FIGS. 2A and 2C. It is formed on the surface 121. According to this, when the connection work of the supply pipe for supplying the compressed air to the air dryer 10 is performed, it is only necessary to connect to either the first inlet 14A or the second inlet 14B, so that the supply pipe can be easily routed. The piping connection work can be easily performed.

Further, as shown in FIG. 2A, the first inlet 14 </ b> A and the second inlet 14 </ b> B are separated from the back surface 122 and the right side surface 123 of the support base 12 that function as mounting surfaces, which will be described later. 121 are arranged together at the corner where 121 intersects. According to this, when connecting the supply pipe to the first inlet 14A and the second inlet 14B, the supply pipe and a member to be attached to which the attachment surface is attached (for example, a vehicle body frame) may interfere. Therefore, the connection work of the supply pipe can be easily performed.
Further, as shown in FIG. 2B, the front surface 120 of the support base 12 is provided with a first inlet 14A, sideways, a control air inlet 15, and a first outlet 16A. Around the first outlet 16A, A flange 161 for attaching the above-described protection valve 5 is formed. In this configuration, a second outlet communicating with the first outlet 16A is provided, which will be described later.

Next, the internal configuration of the air dryer 10 will be described. 3 is a cross-sectional view taken along the line III-III in FIG. 2A, and FIG. 4 is a cross-sectional view taken along the line IV-IV in FIG. 2C.
As shown in FIG. 3, the support base 12 is integrally provided with a protruding portion 12A on the bottom surface side, and is provided with an inner ring portion 124 and an outer ring portion 126 concentrically on the upper surface side. The inner ring portion 124 is formed taller than the outer ring portion 126. The upper surface of the support base 12 is greatly pierced between the inner ring portion 124 and the outer ring portion 126, and a ring-shaped space 128 is formed therein. As shown in FIG. 4, the ring-shaped space 128 communicates with a horizontal hole 111 extending substantially horizontally in the protruding portion 12A through a vertical hole 110 extending downward from the ring-shaped space 128. Communicated with the second inlet 14B. Furthermore, the first inlet 14 </ b> A communicates with one of the vertical holes 110 described above. Thereby, the ring-shaped space 128 is used as a space for temporarily storing the compressed air flowing into the support base 12 through the first inlet 14A and the second inlet 14B.

In addition, the upper surface of the support base 12 surrounded by the inner ring portion 124 is greatly enlarged, and a columnar inner space 129 is formed. The inner space 129 communicates with the inside of the dryer main body 13 when the inner ring portion 124 enters the dryer main body 13, and is used as a space for storing the compressed air that has been dried.
As shown in FIG. 4, the inner space 129 communicates with the first outlet 16 </ b> A through a communication hole 112 extending from the inner space 129. Further, as shown in FIG. 3, the inner space 129 communicates with the purge opening 20 provided on the left side surface 121 of the support base through the purge hole 113. For example, a purge tank 45 (see FIG. 6) having a function of regenerating the desiccant can be connected to the purge opening 20.

As shown in FIG. 3, the dryer body 13 includes a desiccant container 50 and an outer cover 70 located on the support base 12. The desiccant container 50 is a container in which a granular desiccant 58 is accommodated, and the lower portion 51 is formed with a smaller diameter than the upper portion 52. A filter element 57 that removes oil and dust in the air is disposed around the lower portion 51. The outer cover 70 is a cover that surrounds the outside of the desiccant container 50 and divides a room 75 that stores compressed air with the desiccant container 50. The large-diameter upper portion 52 is formed slightly smaller than the inner diameter of the outer cover 70, and these gaps serve as air flow paths. A lower lid 60 that holds the filter element 57 is fixed to the lower portion of the outer cover 70. The lower lid 60 has a fitting hole 600 into which the inner ring portion 124 of the support base 12 is fitted, and the fitting hole. A plurality of small-diameter holes 601 that are formed around 600 and communicate with the ring-shaped space 128 are provided.
An upper lid 61 is provided on the upper portion of the desiccant container 50. The upper lid 61 is formed with an opening 610 that connects the chamber 75 and the desiccant container 50, and a check valve that closes the opening 610. 62 is arranged. The check valve 62 is urged so as to be in close contact with the lower surface 611 of the upper lid 61 by a spring member 63 fixed to the inner upper surface 701 of the outer cover 70.

  The compressed air to be dried flows from the first inlet 14A or the second inlet 14B into the ring-shaped space 128 through the horizontal hole 111 and the vertical hole 110 of the support base 12. Then, the air flows into the dryer body 13 from the ring-shaped space 128 through the small-diameter hole 601, and the compressor oil and dust are removed by the filter element 57 here. The compressed air from which oil or the like has been removed flows into the desiccant container 50 when the check valve 62 is opened, and is dehumidified by passing through the desiccant 58 in the desiccant container 50. The dehumidified and dried compressed air reaches the protection valve 5 through the inner space 129, the communication hole 11 and the first outlet 16 </ b> A, and is stored in the external air tanks 6, 7, 8 and 9 through the protection valve 5.

  With such a drying process, drainage containing moisture, compressor oil and dust is generated. The air dryer 10 includes a drain valve 90 for discharging such drain. As shown in FIG. 4, the drain valve 90 is disposed in a drain valve accommodation hole 115 that intersects the lateral hole 111, and includes a control piston 92 that is integral with the valve member. The control piston 92 receives a force generated by the valve spring 94 and a force associated with the pressure in the control chamber 96. A control command pressure from the pressure governor 40 (FIG. 3) built in the support base 12 is applied to the control chamber 96. As shown in FIG. 3, the pressure governor 40 includes a piston 41 that moves in response to a change in pressure of the air pressure in the air tank (that is, the pressure of the compressed air that has been sent out from the outlet). The pressure governor 40 opens and closes the valve according to the movement of the piston 41, and maintains the air pressure in the air tank within a specified pressure range. When the pressure governor 40 opens the valve, it gives a control command pressure to the control chamber 96 of the drain valve 90. When the control command pressure is output from the pressure governor 40, the control piston 92 moves to open the drain valve 90. Thereby, the drain containing moisture and oil is discharged to the outside through the exhaust space 116 formed in the protruding portion 12 </ b> A together with the compressed air in accordance with the opening and closing of the drain valve 90. A silencer 117 is provided in the exhaust space 116 in order to reduce noise accompanying the discharge.

By the way, the air dryer as described above is generally installed in a narrow space of a vehicle, and this space often varies depending on the vehicle model to be attached. For this reason, the conventional air dryer is designed to design the position of the mounting portion and the inlet of the compressed air that match the mounting position of the vehicle for each vehicle to be mounted, and to form the mounting portion and the inlet on the support base. I was going. For this reason, there existed a problem that the versatility of an air dryer was scarce and also productivity was bad.
In order to solve this problem, the support base 12 of the air dryer 10 according to this configuration includes a first mounting surface and a second mounting surface that are directed in different directions. Specifically, as shown in FIGS. 5A and 5C, a first mounting portion 31 is formed on the back surface 122 of the support base 12 as the first mounting surface, and a second mounting surface adjacent to the back surface 122 is formed. A second attachment portion 32 is formed on the right side surface 123.

The first attachment portions 31 are provided in a triangular shape so as to surround the rectangular member 43 provided on the back surface 122 of the support base 12. The first attachment portions 31 are screw holes into which fixing bolts are screwed. Is formed. On the other hand, the second attachment portion 32 is provided in a triangular shape so as to surround the pressure governor 40, and a screw hole into which the fixing bolt is screwed is formed in the second attachment portion 32. As shown in FIG. 2B, the second mounting portion 32 is provided at a position where the end surface of the second mounting portion 32 is lower than the pressure governor 40, so that the air dryer 10 can be used using the second mounting portion 32. In the case of mounting, a collar member 32A (FIG. 6) through which a fixing bolt passes may be interposed between the mounting target member such as the vehicle body frame 80 (FIG. 6) and the second mounting portion 32.
A second outlet 16B is formed on the right side surface 123 of the support base 12 at a corner intersecting the front surface 120. The second outlet 16B communicates with the first outlet 16A in the support base 12. Yes. For example, a wet tank 46 (see FIG. 6) having a function of simply removing and accumulating moisture and oil by expanding compressed air can be connected to the second outlet 16B.

Next, how the air dryer 10 is attached will be described.
6A is a view showing a state in which the air dryer 10 is attached to the vehicle body frame 80 by using the back surface 122 of the support base 12, and FIG. 6B is a view in which the air dryer 10 is attached to the vehicle body frame using the right side surface 123 of the support base 12. It is a figure which shows the state attached to 80. FIG.
6A and 6B, the vehicle body frame 80 is a highly rigid frame extending in the longitudinal direction of the vehicle. In general, the air dryer 10 is often attached to a side surface of the vehicle body frame 80.
As shown in FIG. 6A, when the air dryer 10 is attached to the vehicle body frame 80 via the first attachment portion 31 provided on the back surface 122 of the support base 12, the first inlet 14A opens in the width direction of the vehicle body. The second inlet 14B opens in the front-rear direction of the vehicle body. Therefore, for example, by connecting the second supply pipe 48 to the second inlet 14B, the second supply pipe 48 can be disposed along the vehicle body frame 80. The pipes can be routed well without protruding greatly in the width direction. Even in this case, by connecting the first supply pipe 47 to the first inlet 14A, for example, a pipe connection that bypasses a device (not shown) arranged adjacent to the air dryer 10 is easily performed. be able to.
When the air dryer 10 cannot be directly attached to the vehicle body frame 80, a bracket 81 extending from the vehicle body frame 80 in the vehicle width direction is provided as shown by a wavy line in FIG. It is also possible to attach the air dryer 10 using the right side surface 123. In this case, it is desirable to interpose the collar member 32 </ b> A between the second mounting portion 32 provided on the right side surface 123 and the bracket 81. In this configuration, the air dryer 10 can be attached in the same posture as that attached to the vehicle body frame 80 using the back surface 122 of the support base 12.

On the other hand, when attaching the air dryer 10 to the vehicle body frame 80 using the right side surface 123 of the support base 12, as shown in FIG. 6B, a stay 80A is fixed to the vehicle body frame 80, and the support base 12 is fixed to the stay 80A. It attaches via the 2nd attachment part 32 provided in the right side surface 123 of this. Similarly in this case, it is desirable to interpose the collar member 32 </ b> A between the second mounting portion 32 provided on the right side surface 123 and the bracket 81. The support base 12 of the air dryer 10 may be directly attached to the vehicle body frame 80.
In this aspect, the first inlet 14A opens in the front-rear direction of the vehicle body. The second inlet 14B opens in the width direction of the vehicle body. Therefore, for example, by connecting the first supply pipe 47 to the first inlet 14A, the first supply pipe 47 can be disposed along the vehicle body frame 80, so that the first supply pipe 47 is connected to the vehicle. The pipes can be routed well without protruding greatly in the width direction. Even in this case, by connecting the second supply pipe 48 to the second inlet 14B, for example, a pipe connection that bypasses a device (not shown) arranged adjacent to the air dryer 10 is easily performed. be able to.
Further, when the air dryer 10 cannot be directly attached to the vehicle body frame 80 and the stay 80A, a bracket 82 extending from the vehicle body frame 80 in the vehicle width direction is provided as shown by a wavy line in FIG. In addition, the air dryer 10 can be mounted using the back surface 122 of the support base 12. In this configuration, the air dryer 10 can be attached in the same posture as that attached to the vehicle body frame 80 using the right side surface 123 of the support base 12.

  As described above, according to the present embodiment, the support base 12 including the inlet 14 that receives the compressed air to be dried and the outlet 16 that sends out the compressed air that has been dried is provided on the support base 12. A desiccant container 50 that contains a desiccant 58 in the interior of the container and is capable of drying the compressed air from the inlet 14 through the desiccant 58, and on the support base 12, An outer cover 70 that surrounds the outside and defines a chamber 75 for storing compressed air between the desiccant container 50 and the support base 12, wherein the first mounting portion 31 and the second mounting portion 32 are respectively formed and are different. 14 A of 1st inlets which receive the compressed air which orient | assigns the back surface 122 as a 1st attachment surface which directs a direction, and the right side surface 123 as a 2nd attachment surface, and a different direction. Since the second inlet 14B is provided, when the support base 12 is attached to the body frame 80 to be attached, one of the rear surface 122 and the right side surface 123 and one of the first inlet 14A and the second inlet 14B. By selecting, the variation of the combination of the mounting surface and the inlet can be increased, and the air dryer 10 can be easily mounted at various mounting positions with the same configuration. Further, since the air dryer 10 having the same configuration can be attached to various attachment positions, versatility and productivity of the air dryer 10 can be improved.

  Moreover, according to this embodiment, since the 1st, 2nd attachment surface is formed in the back surface 122 and the right side surface 123 which adjoin among the side surfaces of the support base 12, it is easy to support base 12 with respect to attachment object. It can be installed by changing the direction of the. In addition, since the first inlet 14A and the second inlet 14B are arranged together at the corner where the front surface 120 and the left side surface 121 of the support base 12 that are separated from the back surface 122 and the right side surface 123 intersect, When connecting a supply pipe to either the first inlet 14A or the second inlet 14B, the supply pipe is connected to the body frame 80 to which the rear face 122 or the right side face 123 is attached without interfering with the supply pipe. It can be done easily.

  Moreover, according to this embodiment, since the 1st exit 16A is arrange | positioned in the front 120 of the support base 12 facing the back surface 122 of the support base 12, devices, such as the protection valve 5, are attached to this 1st exit 16A. Work can be done easily.

Although the best embodiment for carrying out the present invention has been described above, the present invention is not limited to the above-described embodiment, and various modifications and changes can be made based on the technical idea of the present invention. It is. For example, in this embodiment, a sealing plug (not shown) is arranged at the unused inlet of the first inlet 14A and the second inlet 14B. However, the present invention is not limited to this. For example, a plurality of scheduled openings may be provided in correspondence with the plurality of inlets at the manufacturing stage, and any of the planned openings may be perforated to form the inlet according to the mounting state of the support base 12. According to this configuration, it is only necessary to perforate the planned opening portion with respect to the entrance that is known to be actually used in advance, and accordingly, the work process is reduced and workability is improved. Further, in this configuration, the planned opening portion for the unused inlet is not perforated, so that it is not necessary to close the inlet with a sealing plug or the like, and air leakage from the inlet can be reliably prevented.
Further, in this embodiment, a flange 161 is formed around the first outlet 16A provided on the front surface 120 of the support base 12, and the protection valve 5 is attached to the flange 161, and the right side surface 123 of the support base 12 is attached. Although the wet tank 46 is connected to the provided second outlet 16B, the present invention is not limited to this, and the wet tank 46 or the protection valve 5 may alternatively be attached to the first outlet 16A. When the wet tank 46 is attached to the first outlet 16A, the protection valve 5 can be attached in series to the wet tank 46. According to this configuration, it is possible to select a device to be attached to the first outlet 16A according to the attachment state of the support base 12 and the arrangement state of peripheral devices, and various air circuit layouts can be realized.

DESCRIPTION OF SYMBOLS 1 Air circuit 5 Protection valve 6-9 Air tank 10 Air dryer 12 Support base 13 Dryer main body 14 Inlet 14A 1st inlet 14B 2nd inlet 16 Outlet 16A 1st outlet 31 1st attaching part 32 2nd attaching part 47 1st supply piping 48 Second supply pipe 50 Desiccant container 58 Desiccant 70 Outer cover 75 Room 80 Body frame 80A Stay 81, 82 Bracket 120 Front 121 Left side 122 Rear (first mounting surface)
123 Right side (second mounting surface)

Claims (4)

A support base including an inlet for receiving compressed air to be dried and an outlet for delivering processed compressed air that has been dried, and a container supported on the support base, containing a desiccant therein, A desiccant container capable of drying the compressed air from the inlet through the desiccant, and an outer cover which surrounds the outside of the desiccant container on the support base and defines a room for storing the compressed air between the desiccant container In an air dryer comprising
The support base includes first and second attachment surfaces that are directed in different directions and are selectively attached to a member to be attached, and a plurality of inlets that receive compressed air directed in different directions. Air dryer.   The first and second mounting surfaces are formed on adjacent surfaces among the side surfaces of the support base, and the plurality of inlets are collectively arranged at corners of the support base apart from the mounting surfaces. The air dryer according to claim 1.   The outlet is disposed on a side surface of the support base opposite to the first mounting surface, and a wet tank or a protection valve can be selectively attached to the outlet. Air dryer. The plurality of inlets are a plurality of unperforated scheduled openings , and the inlet is formed by drilling any of the scheduled openings according to the mounting state of the support base. Item 4. The air dryer according to any one of Items 1 to 3.

Images