JPS5993985A - Discharge piping system for compressor - Google Patents

Abstract

PURPOSE:To simplify the overall construction of a compressor and its discharge piping system by installing a check valve over an after-cooler solidly as in a single piece and by connecting this check valve to the discharge side of compressor. CONSTITUTION:A check valve 5 is installed to a flange 6b provided at the top of a shell 6a of after-cooler 6 and has a valve element 5b inside. A drain separator 12 is furnished at the lower part of this after-cooler 6, and a cooling pipe 11 connected with its both ends to a supply 14 and an exhaust 15 pipe for the cooling water is housed in said drain separator 12 and after-cooler 6.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a compressor, primarily a discharge piping system for an oil-free screw compressor.

[Prior art]

In conventional oil-free screw compressors, the air in the discharge pipe is released into the atmosphere during no-load startup, and the pressure is maintained in the discharge pipe using vacuum pressure on the suction side, thereby increasing the compression ratio. It is well known that this prevents the temperature of the discharged air from rising abnormally.

FIG. 1 shows a system diagram of the oil-free screw compressor, in which a suction throttle valve 2 equipped with a piston device 5 is provided in the suction side piping 7 of the compressor 1, and a discharge air cooler is provided in the discharge side piping 8. 4. A check valve 5 and an aftercooler 6 are provided. When the compressor 1 is started with no load, the air in the discharge pipe 8 from the compressor 1 to the check valve 5 flows through the discharge pipe 9 and The air is discharged into the atmosphere from the air discharge pipe 10 through the piston device 5, but the air in the discharge pipe 8a between the check valve 5 and the aftercooler 6 is not discharged to the atmosphere.
The details of the check valve 5 and the aftercooler 6 that remain in the discharge pipe 8a and maintain the pressure in the discharge pipe 8a are as shown in FIG. 2, and the former check valve 5 is a valve body. 5
The latter aftercooler 6 may have a structure in which the lower part thereof is inserted into a drain separator 12 having a discharge lower, and the cooling pipe 11 is housed within this drain separator 12 and the aftercooler 6. cooling pipe 11
One end is connected to the cooling water supply pipe 14, and the other end is connected to the cooling water discharge pipe 15.
A check valve 5 having a built-in valve body 5a connected to the discharge side of the compressor via a discharge pipe 8 as described above, and a check valve 5 connected to this floating valve 5 via a discharge pipe 8a. In the discharge piping system consisting of the aftercooler 6, the high temperature and high pressure compressed air discharged from the compressor is transferred to the discharge piping 8, the check valve 5 and the discharge piping 8.
It flows into the aftercooler 6 through a. The high-temperature, high-pressure compressed air that has flowed into the aftercooler 6 is cooled by exchanging heat with the cooling water flowing through the cooling pipe 11.
The moisture contained in the compressed air is drain and naru. This drain is separated in the drain separator 12 and discharged to the outside, and the compressed air separated from the drain is discharged from the discharge port 1.
It is discharged from 5.

As mentioned above, in the conventional discharge piping system, the check valve 5 and the aftercooler 6 are connected via the long discharge piping 8a, which not only increases the number of parts and assembly man-hours, resulting in high equipment costs. However, there is a drawback that the entire compressor including the discharge piping system becomes large in size. [Object of the Invention] The purpose of the present invention is to eliminate the above-mentioned drawbacks, simplify the discharge piping system, and downsize the entire compressor. [Summary of the Invention] In order to achieve the above object, the present invention provides a check valve connected to the discharge side of a compressor, an aftercooler that is integrated with a drain separator and has a built-in cooling pipe. In the discharge piping system for a compressor, the check valve is integrally configured on the aftercooler, and the check valve is connected to the discharge side of the compressor. [Embodiment of the Invention] An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 5, reference numeral 5 denotes a check valve that is installed at the top of the shell 6a of the aftercooler 6 and has a built-in valve body 5b attached to a flange 6b. It is connected to the discharge side of the machine (not shown).
17) is a drain separator installed at the bottom of the aftercooler 26. Inside the L/7 separator 12 and the aftercooler 6, there is a drain separator whose both ends are connected to the cooling water supply pipe 14 and the discharge pipe 15, respectively. The present embodiment in which the pipe 11 is housed has the above-mentioned configuration, and the high-temperature, high-pressure compressed air discharged from the compressor flows into the check valve 5 through the discharge pipe 8 and then immediately passes through the aftercooler. 6.

The compressed air that has flowed into the aftercooler 6 is cooled by exchanging heat with the cooling water flowing through the cooling pipe 11.
The moisture contained in the compressed air becomes drain. This drain is separated in the drain separator 12 and discharged to the outside, and the compressed air separated from the drain is discharged from the discharge port 1.
[Effects of the Invention] As explained above, according to the present invention, the check valve and the aftercooler are connected by combining and integrating the check valve and the aftercooler. The delivery piping system can be simplified by eliminating the discharge piping and reducing the number of parts. Therefore, not only can equipment costs be significantly reduced (maintenance of the check valve becomes easier, but the compressor as a whole can be made smaller).

[Brief explanation of the drawing]

Figure 1 is a system diagram of an oil-free screw compressor, Figure 2
The figure is a detailed diagram of a conventional compressor discharge piping system, and FIG. 5 is a configuration diagram showing an embodiment of a compressor discharge piping system according to the present invention.

Claims (1)

[Claims] In a compressor discharge piping system consisting of a check valve connected to the discharge side of the compressor and an aftercooler that is integrated with a drain separator and has a built-in cooling pipe, the check valve is installed on the aftercooler. A discharge piping system for a compressor, characterized in that it is installed and configured integrally, and its check valve is connected to the discharge side of the compressor.