JP2013227956A - Air supply system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air supply system capable of coping with a rapid increase/decrease of a use air amount while reducing electric power consumption of the entire air line.SOLUTION: An air supply system comprises: a source pressure air compressor compressing air; first and second air lines connected to the source pressure air compressor; a first booster compressor connected to the first and second air lines and boosting the pressure of the air compressed by the source pressure air compressor; and a second booster compressor arranged on the second air line between the source pressure air compressor and the first booster compressor, boosting the pressure of the air compressed by the source pressure air compressor, and supplies it to the first booster compressor.

Description

  The present invention relates to an air supply system.

  As a background art of this technical field, there is Patent Document 1.

  Patent Document 1 describes a gas generation system that boosts factory air, which is compressed air used for multiple purposes in a factory, with a booster compressor and supplies it to a gas separator.

JP2011-167602A

  For example, when the gas generation system according to Patent Document 1 is used in a factory, it is necessary to set the air pressure of a source pressure air compressor that generates factory air sufficiently high in preparation for a rapid increase in the amount of air used. Further, not only the gas generation system described in Patent Document 1, but also when using factory air in other applications (for example, pneumatic equipment) in the factory, it is necessary to prepare for a sudden increase in the amount of air used. is there. Therefore, when the amount of air used is small, the power consumption of the entire air line cannot be reduced.

  In view of the above problems, an object of the present invention is to provide an air supply system that can cope with a sudden increase in the amount of air used while reducing the power consumption of the entire air line.

  In order to solve the above-described problems, the present invention provides an original pressure air compressor that compresses air, a first air line and a second air line connected to the original pressure air compressor, and the first air line. And a first booster compressor connected to the second air line and pressurizing the air compressed by the source pressure air compressor, and the source pressure air compressor on the second air line. And a second booster compressor disposed between the first booster compressor, pressurizing the air compressed by the original pressure air compressor, and supplying the air to the first booster compressor Provide a supply system.

  According to the present invention, it is possible to provide an air supply system that can cope with a sudden increase in the amount of air used while reducing the power consumption of the entire air line.

It is an air supply system in Example 1 of this invention. It is an air supply system in Example 2 of this invention.

  An air supply system according to Embodiment 1 of the present invention will be described with reference to FIG.

  The source pressure air compressor 1 is constituted by, for example, a large screw compressor, and supplies compressed air to a whole factory via a plurality of air lines. The supplied compressed air is used for multiple purposes at multiple locations. In the present embodiment, the large screw compressor is used, but the present invention is not limited thereto, and may be, for example, a reciprocating compressor or a scroll compressor.

  The main pressure air compressor 1 is connected to the three-way solenoid valve 10 via the air outlet main pipe 2 (first air line), and the outlet of the three-way solenoid valve 10 pressurizes the compressed air supplied from the first air line. Connected to the intake of the booster 3. The air outlet of the booster 3 is connected to the air tank 5 via the outlet pipe 4. The air tank 5 is connected to the pneumatic device 6 at the final stage by piping, stores compressed air boosted by the booster 3, and supplies the compressed air to the pneumatic device 6. Here, in the present embodiment, the pneumatic device 6 will be described as an example of a pneumatic tool that uses compressed air. The pneumatic device 6 is not limited to this as long as it uses compressed air, and may be, for example, a gas separation device.

  Intake of air in the sub-booster 8 for boosting the compressed air generated in the main-pressure air compressor 1 by the sub-pipe 7 (second air line) separately from the air outlet main pipe 2 exiting from the main-pressure air compressor 1 It is connected to the mouth. The air outlet of the sub booster 8 is connected to the booster 3 for boosting the compressed air supplied from the three-way solenoid valve 10 and the second air line via the sub booster air outlet pipe 9 (second air line). Yes.

  The air tank 5 is provided with a pressure sensor 11 for detecting the pressure in the tank. A signal is input to the control panel 13 by the pressure sensor signal 12 from the pressure sensor 11. An operation signal from the control panel 13 to the three-way solenoid valve 10 is input with a solenoid valve output signal 14. Further, a sub booster start / stop signal 15 is input from the control panel 13 to the sub booster 8. The three-way solenoid valve 10 functions as a switching unit that switches whether compressed air is supplied to the booster 3 from either the first air line or the second air line. Here, although the three-way solenoid valve 10 is disposed between the sub-booster 8 and the booster 3, the position where the three-way solenoid valve 10 is disposed is not limited to the above position. The three-way solenoid valve 10 may be disposed at a position where switching of whether or not the supply of compressed air from the first air line and the second air line to the booster 3 can be shut off is performed. For example, the original pressure air compressor 1 And the sub-booster 8 may be connected.

  The operation of the air supply system in the present embodiment will be described.

  First, the source pressure air compressor 1 is operated, and the compressed air is supplied to the first air line. Compressed air is supplied from the first air line to the booster 3 via the electromagnetic valve 19, and the booster 3 pressurizes the compressed air. The high-pressure compressed air boosted by the booster 3 is stored in the air tank 5 and supplied to the pneumatic equipment 6 that requires high pressure.

  At this time, the three-way solenoid valve 10 supplies the compressor air from the main pipe 2 (first air line) to the booster 3, and connects the sub booster air outlet pipe 9 (second air line) to the booster 3. The supply of compressed air is shut off.

  Here, when the required air amount of the pneumatic device 6 suddenly increases, the pressure sensor 11 detects a pressure drop in the air tank 5 and sends a signal to the control panel 13. Next, the control panel 13 recognizes that the air amount is insufficient and activates the sub-booster 8. Further, the connection between the main pipe 2 (first air line) and the booster 3 is cut off, and the three-way solenoid valve 10 is switched to the connection between the sub booster air outlet pipe 9 (second air line) and the booster 3.

  When the three-way solenoid valve 10 is switched, the compressed air from the primary pressure air compressor 1 is supplied to the sub booster 8 via the sub pipe 7 (second air line). The compressed air boosted by the sub booster 8 is supplied to the booster 3 via the sub booster air outlet pipe 9 (second air line).

  For example, the original pressure air compressor 1 is normally set to 0.3 MPa, boosted to 1.0 MPa by the booster 3 and accumulated in the air tank 5. At this time, if the amount of air consumption increases suddenly, the control panel switches to the line of the sub-booster 8 as described above. The sub-booster 8 takes in the original pressure of 0.3 MPa and boosts it to, for example, 0.5 MPa.

  Normally, booster 3 takes 0.3MPa air, but after switching, it takes 0.5MPa air. At this time, the pressure in the air tank 5 can be increased more quickly by increasing the amount of air discharged from the booster 3 per volume. As a result, it is possible to cope with a sudden increase in the amount of air used by the pneumatic device 6, and there is no occurrence of malfunctions in the pneumatic device 6.

  Further, during normal operation where the amount of air used is not large, even if the main pressure air compressor 1 is kept as low as 0.3 Mpa, it can cope with a sudden increase in the amount of air used, so that the power cost is kept low. be able to.

  As described above, according to the present embodiment, during normal times when the amount of air used is not large, the pressure of the compressor for main pressure 1 can be kept low, and it is used suddenly while reducing power consumption in the entire air line. Even if the amount of air increases, the compressed air supplied to the pneumatic device 6 or the like can be handled without running short.

  Furthermore, if the piping connection of this embodiment is used, the main piping 2 and the main booster air outlet piping that have been used conventionally can be used as they are only with the piping of the sub booster 8 without any significant piping change, and when additionally remodeling There is also an advantage that the construction period can be shortened.

  An air supply system according to Embodiment 2 of the present invention will be described with reference to FIG. The same components as those of the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  A feature of this embodiment is that a plurality of sub-boosters 8 are connected in parallel to form a second air line.

  The sub-pipe 7 exiting from the source pressure air compressor 1 branches into three, and each is connected to the sub-booster 8. The air outlet of each sub booster 8 is connected to a sub booster air outlet pipe 9. One of the sub booster air outlet pipes 9 is connected to the three-way solenoid valve 10 as the switching part together with the main pipe 2, and the remaining sub booster air outlet pipes 9 are connected to the two-way solenoid valve 16 as the switching part. . The three-way solenoid valve 10 as the switching unit and the two-way solenoid valve 16 as the switching unit are connected to the booster 3, respectively.

  The electromagnetic valve output signal 14 from the control panel 13 is input to the three-way electromagnetic valve 10 and the two-way electromagnetic valve 16, and the sub booster start / stop signal 15 is input to the respective sub boosters 8.

  The operation of the air supply system in the present embodiment will be described.

  In this embodiment, when the amount of air used is small, the three-way solenoid valve 10 supplies the compressor air from the main pipe 2 (first air line) to the booster 3 as in the first embodiment. The supply of compressed air from the sub booster air outlet pipe 9 (second air line) to the booster 3 is shut off.

  When the required air amount of the pneumatic device 6 suddenly increases, the pressure sensor 11 detects a pressure drop in the air tank 5 and sends a signal to the control panel 13 as in the first embodiment. Next, the control panel 13 recognizes that the air amount is insufficient and activates the sub-booster 8 connected to the three-way solenoid valve 10. Further, the connection between the main pipe 2 (first air line) and the booster 3 is cut off, and the three-way solenoid valve 10 is switched to the connection between the sub booster air outlet pipe 9 (second air line) and the booster 3.

  Further, when the required air amount of the pneumatic device 6 suddenly increases, the control panel 13 activates the sub-booster 8 connected to the two-way electromagnetic valve 16 according to the increased amount. Further, the two-way solenoid valve 16 is switched so that air is supplied from the sub booster 8 connected to the two-way solenoid valve 16 to the booster 3.

  In this embodiment, the piping from which the air is supplied to the booster 3 by the three-way solenoid valve 10 and the two-way solenoid valve 16 is switched. However, the three-way solenoid valve 10 and the two-way solenoid valve 16 do not need to be arranged as shown in FIG. 2, and all the two-way solenoid valves can be switched, for example, from which pipe the air is supplied to the booster 3. 16 may be arranged.

  The control panel 13 has three sub-boosters 8 and switches the number of sub-boosters 8 to be activated according to the required air amount. The two-way solenoid valve 16 is switched according to the number of sub boosters 8 to be activated, and the amount of air supplied to the booster 3 is switched.

  In this embodiment, a plurality of sub-boosters 8 are provided, but a plurality of sub-boosters 8 having different pressures that can be boosted may be provided. As a result, it is possible to respond more precisely and accurately to changes in the amount of air required.

  As described above, according to the present embodiment, the plurality of sub boosters 8 are connected in parallel to form the second air line. Therefore, how many of the plurality of sub boosters 8 are activated according to the required air amount. You can choose. Compared with the first embodiment, it becomes possible to take a more precise and precise response in accordance with the change in the required air amount, whereby the pressure boosted by the air compressor 1 for the original pressure can be kept low, and the power consumption can be reduced. Reduction is possible.

  The embodiments described so far are merely examples of implementation in carrying out the present invention, and the technical scope of the present invention is not limitedly interpreted by these. That is, the present invention can be implemented in various forms without departing from the technical idea or the main features thereof.

1 Air pressure compressor for main pressure 2 Main piping 3 Main booster 4 Main booster air outlet piping 5 Air tank 6 Pneumatic equipment 7 Sub piping 8 Sub booster 9 Sub booster air outlet piping 10 Three-way solenoid valve 11 Pressure sensor 12 Pressure sensor signal 13 Control panel 14 Solenoid valve output signal 15 Sub-booster start / stop signal 16 Two-way solenoid valve

Claims (7)

An air compressor for source pressure that compresses air;
A first air line and a second air line connected to the source pressure air compressor;
A first booster compressor that is connected to the first air line and the second air line and pressurizes the air compressed by the original pressure air compressor;
On the second air line, disposed between the main pressure air compressor and the first booster compressor, pressurizes the air compressed by the main pressure air compressor, and An air supply system comprising: a second booster compressor that supplies the booster compressor.   The first booster compressor and the original pressure air compressor are switched to switch whether to supply compressed air from the first air line or the second air line to the first booster compressor. The air supply system according to claim 1, wherein the air supply system is provided in between.   When the amount of compressed air increased in pressure by the first booster compressor increases, the supply of air from the first air line to the first booster compressor is shut off, and the second air line The air supply system according to claim 2, wherein the switching unit is controlled to supply air to the first booster compressor.   An air tank connected to the first booster compressor and storing air supplied from the first booster compressor; and when the pressure of the air tank decreases, the air tank 3. The switching unit is controlled to cut off the supply of air to one booster compressor and supply air from the second air line to the first booster compressor. The air supply system described.   2. The air supply according to claim 1, wherein the second air line is branched into a plurality, and the plurality of second booster compressors are arranged in parallel on the second air line branched into the plurality. system.   The switching unit for switching whether to supply compressed air from any of the plurality of second booster compressors is provided between the first booster compressor and the main pressure air compressor. 6. The air supply system according to 5.   The air supply system according to claim 5, wherein the pressures increased by the plurality of second booster compressors are different.

Images