JPH0537628U - Silencer for air dryer - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a muffler for an air dryer, which is capable of enhancing the muffling effect and facilitating the treatment of a hose. [Configuration] The discharge pipe 11 of the air dryer 10 is connected to the vehicle body 20.
By connecting via a vinyl hose 30 to the stay pipes 23 of the entanglement prevention side guards 22 on the chassis frame 21 side equipped with the air dryer 10 among the entanglement prevention side guards 22 provided on both sides of the It is composed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a silencer for an air dryer, which silences a discharge sound emitted from a discharge pipe of the air dryer when the pressure inside the air dryer is released.

[0002]

[Prior Art]

 Some trucks, buses, etc. use compressed air as a power source for opening and closing brakes and bus doors. This compressed air is produced by an air compressor that uses the rotation of the engine to compress the air, but the compressed air has a higher water content than the atmospheric pressure. Therefore, if the air compressed by the air compressor is stored in an air tank and used as it is as a drive source for a brake or the like, the function of the brake or the like will be impaired. Therefore, an air dryer is provided to dry the air compressed by the air compressor.

The air dryer takes in compressed air from the inlet port when the air compressor is in a loaded state (loaded state), drops moisture and oil from the compressed air, and removes smaller oil droplets and dust. After that, it is dried by passing it through a desiccant to make it dry air. When the air compressor is in the unload state (no load), the exhaust valve (discharge valve) is opened to change the pressure inside the air dryer from the discharge pipe to the outside. The filter is then opened to clean the filter, and at the same time, the water and oil that have accumulated at the bottom are released to the atmosphere, and the water is recovered from the desiccant and released to the atmosphere to regenerate the desiccant.

[0004]

[Problems to be solved by the device]

 However, when the exhaust valve was opened to release the pressure inside the air dryer, an open discharge sound was emitted, which was offensive to the driver and the like.

In order to reduce such discharge noise, it is conceivable, for example, to connect a vinyl hose to the discharge pipe of an air dryer and attenuate the discharge sound in the vinyl hose to mute the sound. In this case, the vinyl hose should be made as long as possible in order to improve the sound deadening effect. However, the longer the vinyl hose, the more difficult it is to take measures such as clipping the vinyl hose to the vehicle body.

Therefore, an object of the present invention is to provide a muffling device for an air dryer, which can improve the muffling effect and can easily treat a hose.

[0007]

[Means for Solving the Problems]

 The present invention is characterized in that the discharge pipe of the air dryer is connected to a stay pipe of a side guard for preventing entanglement mounted on the vehicle body through a hose, and the air is discharged through the stay pipe. The above object is achieved by providing a silencer for an air dryer.

[0008]

[Action]

 When the pressure inside the air dryer is released, the discharge air containing water and oil is led from the discharge pipe through the hose to the stay pipe of the side guard and is discharged into the atmosphere from the stay pipe. Air pressure is damped in the hose and stay pipe.

[0009]

【Example】

 An embodiment of the muffler for an air dryer according to the present invention will be described below.

1 to 3 show an embodiment of a muffler for an air dryer according to the present invention. FIG. 1 is a plan view of a chassis of a cab-equipped vehicle equipped with the muffler for an air dryer of this embodiment. FIG. 2 is a side view of the same, and FIG. 3 is an explanatory view showing the internal structure and air circuit of the air dryer.

The muffler for an air dryer according to the present embodiment is equipped with the discharge pipe 11 (see FIG. 3) of the air dryer 10 on both sides of the vehicle body 20 via a vinyl hose 30 so as to prevent entanglement (FIG. 1). 2), for example, the air dryer 10 is connected to the staple pipe 23 of the side guard 22 for preventing entanglement on the chassis frame 21 side.

As shown in FIG. 3, the air dryer 10 is filled in an upper chamber 13 a having an outlet port 12, a lower chamber 13 b having an inlet port 14, and the chambers 13 a and 13 b. , The desiccants 15a and 15b for removing the water in the compressed air sent from the air conditioner press 41 of the air circuit 40, and the discharge pipe 11 at the bottom of the lower chamber 13b, and the pressure regulator 44 It is provided with an exhaust valve 16 for receiving the signal pressure and releasing the pressure inside the air dryer 10.

As described above, the vinyl hose 30 is connected between the discharge pipe 11 and the stay pipe 23, and although the middle portion of the hose 30 is not shown, the chassis frame 21 and the entanglement prevention member are not shown. The side guard 22 and the like are fixed by applying a clip or the like.

It should be noted that the vinyl hose 30 is not connected to only one stay pipe 23, but the hose 30 is branched so that each of the entanglement prevention side guards 22 on the chassis frame 21 side equipped with the air dryer 10 is prevented. You may make it respectively connect with the stay pipe 23. Further, the vinyl hose 30 may be connected to the stay pipe 23 of the entanglement prevention side guard 22 on the side opposite to the chassis frame 21 equipped with the air dryer 10.

Next, the operation of the air dryer 10, the vinyl hose 30, and the stay pipe 23 will be described.

When the air compressor 41 is in a loaded state (loaded state), the air dryer 10 takes in compressed air from the inlet port 14 and conveys the compressed air to the circumference between the lower chamber 13b and the housing of the desiccant 15b. The water and oil components are dripping and removed by contacting with the inner peripheral wall of the chamber 13b, the oil mist separator 17, etc., and further small oil droplets and dust are removed through the filter 18, and then the lower drying is performed. The agent 15b is passed through the desiccant 15a above and dried to obtain dry air. The compressed air that has become dry air is supplied from the outlet port 12 through the check valve 19 of the air dryer 10 and the purge tank 42 to the main air tank 43. Moisture and oil in the compressed air are dripping and accumulate at the bottom of the air dryer 10.

When the pressure of the compressed air in the air circuit 40 reaches the upper limit, the signal air pressure from the pressure regulator 44 causes the air compressor 41 to be in the unload state (no load state), so that the compressed air is supplied. While stopped, the exhaust valve 16 is opened by the signal air pressure from the pressure regulator 44 through the air line 45, and the pressure inside the air dryer 10 is suddenly released.

As a result, the filter 18 is cleaned, and the water and oil accumulated at the bottom are released to the atmosphere. At this time, the pressure inside the air dryer 10 (discharged air) escapes to the outside through the vinyl hose 30 and the stay pipe 23, but is sufficiently attenuated in the long vinyl hose 30 and the stay pipe 23 during the escape process. . Therefore, it is possible to almost eliminate the discharge sound generated when the exhaust valve 16 is opened.

After the rapid depressurization inside the air dryer 10, the dry air in the purge tank 42 and the upper chamber 13a is decompressed and expanded in the direction opposite to the normal flow (that is, in the downward direction of the air dryer 10 in FIG. 3). By flowing back through the desiccants 15a and 15b, water is recovered from the desiccants 15a and 15b and released into the atmosphere to regenerate the desiccants 15a and 15b. When the regeneration of the desiccants 15a and 15b is completed and the air circuit 40 is loaded again, the signal air pressure from the pressure regulator 44 via the air line 45 is lost, the exhaust valve 16 is closed, and the compressed air is rehydrated. Etc. are removed.

In the sound deadening device of this embodiment, the stay pipe 23 of the side guard 22 for preventing entanglement is used for sound deadening, so that the sound deadening effect can be sufficiently enhanced even if the vinyl hose 30 is relatively short. Therefore, it is easy to take a measure such as clipping the vinyl hose 30 with a clip.

The silencer for an air dryer according to the present invention is not limited to the one shown in the above embodiment. For example, the hose may be extended to the stay pipe in a state of being wound around the wrap-around side guard and connected to the stay pipe. The point is that the discharge pipe of the air dryer should be connected to the stay pipe via a hose.

[0022]

[Effect of the device]

 As described above, the muffler for an air dryer according to the present invention can improve the muffling effect and facilitate the treatment of the hose.

[Brief description of drawings]

FIG. 1 is a plan view of a chassis of a cab-equipped vehicle equipped with the muffler of an air dryer according to an embodiment of the muffler of the present invention.

FIG. 2 is a side view of the same.

FIG. 3 is an explanatory diagram showing an internal structure of an air dryer and an air circuit.

[Explanation of symbols]

 10 Air Dryer 11 Discharge Pipe 20 Car Body 22 Side for Preventing Entrainment 23 Stay Pipe 30 Hose (Vinyl Hose)

Claims (1)

[Scope of utility model registration request] 1. A discharge pipe of an air dryer is connected to a stay pipe of a side guard for preventing entanglement mounted on a vehicle body through a hose, and air is discharged through the stay pipe. A silencer for air dryers.