JP2021134704A - Drain discharge structure in air compression machine - Google Patents

Abstract

To simplify a drain discharge structure in an air compression machine incorporating an air compressor and an air dryer.SOLUTION: The present invention relates to a drain discharge structure in an air compression machine 1 which comprises an air compressor 10 and an air dryer 12 and is configured by comprising a strainer 20 and a drain trap 30. A compressor drain introduction pipe 14 is provided for discharging drain D generated in the air compressor 10, and a dryer drain introduction pipe 16 is provided for discharging drain D generated in the air dryer 12. The compressor drain introduction pipe 14 and the dryer drain introduction pipe 16 are connected to the strainer 20, and the drain trap 30 is connected to a post-stage of the strainer 20. Means for sending the drain D discharged from the air compressor 10 and the air dryer 12 to the strainer 20 and discharging the drain D to the outside via the strainer 20 by the drain trap 30 is adopted.SELECTED DRAWING: Figure 1

Description

The present invention relates to a drain discharge structure in an air compressor, and more particularly to a structure for discharging drain generated in an air compressor having a built-in air dryer.

The compressed air generated by the air compressor is used for food processing, finishing of precision equipment such as lenses, cleaning, and other various purposes. Depending on the use of the compressed air, various devices are arranged in the middle of the pneumatic circuit until the compressed air is discharged from the air compressor. For example, when it is used in an application where it is strictly prohibited to take out water, a configuration is adopted through an air dryer in the middle of the pneumatic circuit, and further, water, oil, sludge and microorganisms that could not be completely removed in the subsequent stage of the air dryer are adopted. In order to remove the above, an air filter made of resin or paper and having a net-like or hollow fiber membrane-like shape or an air filter wrapped with activated carbon is arranged.

By the way, according to the configuration of the conventional compressed air pressure circuit as described above, when the heated compressed air discharged by the air compressor is cooled in the piping line, the amount of saturated water vapor under pressure also decreases, so that in the piping line. There is a problem that drainage occurs and the drainage infiltrates into various devices in the subsequent stage. Therefore, in order to reduce the amount of water vapor in the compressed air generated by the air compressor, an embodiment in which both an air compressor and an air dryer are built in the air compressor itself to form a single package is also adopted.

However, in the air compressor, drainage is generated due to a decrease in the amount of saturated water vapor when generating compressed air in the first place. Further, in the air dryer, the compressed air is cooled by the heat exchanger, so that drainage is similarly generated due to a decrease in the amount of saturated water vapor under pressure. In this way, drainage can occur in both the air compressor and the air dryer.

In order to drain the generated drain, it is common to provide a drain trap. It is a common practice to equip one such drain trap for each device, and the drain generated in each device is discharged for each device.

However, in an air compressor having both an air compressor and an air dryer built-in, it is troublesome and complicated to equip each device with a drain trap, which causes an increase in cost. In addition, the increase in the number of drain traps has also become a factor that complicates the labor of regular maintenance and repair maintenance for malfunctions.

The applicant focused on an air compressor with both an air compressor and an air dryer built-in, and based on the idea that the drain generated when generating compressed air could be discharged at once, maintainability and maintenance This is to develop a drain discharge structure in an air compressor that contributes to improvement of cost performance and functionality, and to propose a "drain discharge structure in an air compressor" in the present invention.

Japanese Unexamined Patent Publication No. 2014-23105

In view of the above problems, it is an object of the present invention to provide a drain discharge structure that contributes to improvement of maintainability, cost performance, and functionality in an air compressor incorporating both an air compressor and an air dryer.

In order to solve the above problems, the present invention is a drain discharge structure in an air compressor including an air compressor and an air dryer, and a strainer and a drain trap, and discharges the drain generated by the air compressor. A compressor drain introduction pipe for the air dryer is provided, and a dryer drain introduction pipe for discharging the drain generated by the air dryer is provided. The strainer consists of a strainer base, a strainer element, and a strainer case in which the strainer element can be incorporated. , The strainer base is equipped with two drain introduction ports to which a strainer element can be placed above and can be connected to a drain introduction pipe, and corresponds to each drain introduction port capable of ejecting drain into the strainer case. It is equipped with two drain ejection holes and one drain outlet that can discharge the drain that has passed through the strainer element, and the compressor drain introduction pipe and the dryer drain introduction pipe are connected to the strainer via the drain introduction pipe. At the same time, a drain trap is connected to the rear stage of the strainer via a drain outlet pipe connected to the drain discharge port, and both the drain discharged from the air compressor and the air dryer are sent to one strainer. A means is adopted in which the drain is discharged to the outside by a drain trap via the strainer.

Further, the present invention employs a means in which a check valve is provided at a predetermined intermediate position in the dryer drain introduction pipe.

Further, the present invention employs a means in which the air dryer is a refrigerating air dryer.

Furthermore, the present invention employs a means in which the drain trap is an electromagnetic drain trap.

Furthermore, the present invention employs a means in which the drain trap is equipped with a cycle timer.

According to the drain discharge structure in the air compressor according to the present invention, the drain discharged from both the built-in air compressor and the air dryer is discharged to the outside by one drain trap and one intervening a strainer. It is not necessary to equip both the air compressor and the air dryer with drain traps, and the simple structure contributes to the simplification of the equipment and the improvement of maintainability, cost performance and functionality. It has an excellent effect.

It is explanatory drawing which shows the embodiment of the drain discharge structure in the air compressor which concerns on this invention. It is explanatory drawing which shows the embodiment of the strainer and the drain trap in the air compressor which concerns on this invention.

In the drain discharge structure of the air compressor 1 according to the present invention, the drain D discharged from both the built-in air compressor 10 and the air dryer 12 is externally provided by one strainer 20 and one drain trap 30. The biggest feature is to discharge to.
Hereinafter, embodiments of the drain discharge structure in the air compressor 1 according to the present invention will be described with reference to the drawings.

The drain discharge structure of the air compressor 1 according to the present invention is not particularly limited to the embodiments described below, and is within the scope of the technical idea of the present invention, that is, a shape capable of exhibiting the same action and effect. It can be changed as appropriate within the range of dimensions, materials, etc.

FIG. 1 is an explanatory diagram showing an embodiment of a drain discharge structure in the air compressor 1 according to the present invention. 2A and 2B are explanatory views showing an embodiment of the strainer 20 and the drain trap 30 in the air compressor 1 according to the present invention, where FIG. 2A is a side view and FIG. 2B is a schematic plan sectional view.
The drain discharge structure in the air compressor 1 according to the present invention is a structure for discharging the drain D generated when the compressed air A is generated in the air compressor 1 having both the air compressor 10 and the air dryer 12 built-in. be.

The air compressor 1 according to the present invention is configured to include an air compressor 10 and an air dryer 12, a strainer 20 and a drain trap 30, and these various devices include a compressor drain introduction pipe 14 and a drain trap 30. The dryer drain introduction pipe 16, the drain outlet pipe 26, and the pipe line R are connected to each other.

The air compressor 10 is a machine that compresses air to generate compressed air A having a predetermined atmospheric pressure or higher, and various methods such as reciprocating type, rotary type, and centrifugal type are used depending on the structure for generating the compressed air A. exist. The method of the air compressor 10 used in the present invention is not particularly limited, and any method and structure can be used. The air compressor 10 is provided with an air compressor tank 11 for temporarily retaining the generated compressed air A, and is connected to a piping path R for sending the generated compressed air A to the air dryer 12. Has been done. Further, it is desirable that the air compressor tank 11 is provided with a pressure gauge S capable of measuring the air pressure of the generated compressed air A, and it is possible to monitor the normality of equipment operation and the balance of air pressure with the air dryer 12. Become.

The piping line R is composed of a hollow pipe for supplying compressed air A, and is arranged to supply compressed air A from the air compressor 10 to the air dryer 12. Further, when the compressed air A is first sent from the air dryer 12, the piping path R is also arranged. The piping line R is provided with an on-off valve B, if necessary.

In the air compressor 10, drain D is generated due to a decrease in the amount of saturated water vapor in the process of generating compressed air A, and the generated drain D is stored in the air compressor tank 11. The air compressor tank 11 is provided with a drain hole 11a for discharging the generated drain D, and a compressor drain introduction pipe 14 is connected to the drain hole 11a.

The compressor drain introduction pipe 14 is composed of a hollow pipe for delivering the drain D, and is provided to send the drain D generated when the compressed air is generated in the air compressor 10 to the strainer 20. The compressor drain introduction pipe 14 is provided with an on-off valve B, if necessary.

The air dryer 12 is a device for drying compressed air A to remove moisture, and there are a freezing type, a hollow fiber membrane type, an adsorption type, and the like depending on the moisture removing method. The air dryer 12 used in the present invention does not depend on any of a freezing type, a hollow fiber membrane type, and an adsorption type, and is not particularly limited, but a refrigerating type air dryer is generally used. It is twelve. The refrigerating air dryer 30 is a device for cooling the compressed air A by utilizing the latent heat of vaporization of the refrigerant to condense and remove the contained moisture, and is suitable because it can be introduced at a relatively low cost. Is. It is desirable to have a pressure gauge S capable of measuring the air pressure of the compressed air A in the air dryer 12, and it is possible to monitor the normality of equipment operation and the balance of air pressure with the air compressor 10.

In the air dryer 12, drain D is generated due to a decrease in the amount of saturated water vapor due to cooling in the process of removing the water content in the compressed air A, and the generated drain D is stored in the air dryer 12. The air dryer 12 is provided with a drain hole 12a for discharging the generated drain D, and a dryer drain introduction pipe 16 is connected to the drain hole 12a.

The dryer drain introduction pipe 16 is composed of a hollow pipe for delivering the drain D, and is provided to send the drain D generated when the compressed air A is generated in the air dryer 12 to the strainer 20. The dryer drain introduction pipe 16 is preferably provided with a check valve 17 at a predetermined intermediate position, and functions to prevent backflow of drain D in the dryer drain introduction pipe 16. Normally, the air compressor 10 and the air dryer 12 are in the same pressure state and are balanced, but the compressed air used ahead of the air dryer 12 is larger than the amount of compressed air A that can be generated by the air compressor 10. When the amount of A increases, it is assumed that the pressure in the air dryer 12 becomes lower than the pressure in the air compressor 10. At this time, a pressure imbalance occurs between the compressor drain introduction pipe 14 and the dryer drain introduction pipe 16, and the drain D may flow back toward the low-pressure dryer drain introduction pipe 16. In order to prevent this, it is preferable to dispose the check valve 21 in the dryer drain introduction pipe 16. Further, the dryer drain introduction pipe 16 is provided with an on-off valve B as needed.

As for the arrangement position of the air compressor 10 and the air dryer 12 in the air compressor 1, it is preferable to arrange the air dryer 12 at a position higher than the air compressor 10 as shown in the figure. By adopting such an embodiment, the height h of the head of the drain D generated in the air compressor 10 and the air dryer 12 is different from each other, so that a difference in the head pressure is generated between the drain Ds, which is generated in the air dryer 12. The drain D is smoothly delivered to the strainer 20 via the dryer drain introduction pipe 16.

The strainer 20 is a device for removing foreign substances (oil, sludge, etc.) contained in the drain D discharged from the air compressor 10 and the air dryer 12, and is mounted on the strainer base 22 and above the strainer base 22. It is composed of a strainer element 27 to be placed and a strainer case 28 in which the strainer element 27 can be incorporated. By interposing the strainer 20, it also acts as a function of stopping the negative pressure that may be generated in the compressor drain introduction pipe 14 and the dryer drain introduction pipe 16 by opening the drain trap 30.

The strainer base 22 is provided with two drain introduction ports 23 to which the compressor drain introduction pipe 14 and the dryer drain introduction pipe 16 can be connected to each other. Further, the strainer base 22 is provided with two drain ejection holes 24 communicating with each of the two existing drain introduction ports 23, so that the drain D can be ejected into the strainer case 28. The drain outlet 24 is provided at the outer peripheral position of the strainer base 22 from the position where the strainer element 27 is placed so that the drain D flowing into the strainer 20 can pass from the outside to the inside of the strainer element 27. Further, the strainer base 22 is provided with one drain discharge port 25 capable of discharging the drain D that has passed through the strainer element 27, and a drain outlet pipe 26 is connected to the drain discharge port 25.

The drain outlet pipe 26 is composed of a hollow pipe for delivering the drain D, and after removing foreign matter from the strainer 20 with respect to the drain D discharged from the air compressor 10 and the air dryer 12, the drain trap 30 is removed from the strainer 20. It is provided to send the head drain D.

The drain trap 30 is a device for mechanically discharging the drain D generated by the air compressor 1 to the outside, and there are an electromagnetic type, a float type, and the like depending on the discharge method. The drain trap 12 used in the present invention does not ask whether it is an electromagnetic type or a float type, and is not particularly limited. However, in view of periodic drain D discharge at predetermined time intervals, an electromagnetic drain trap 12 is used. It is preferable to adopt 30. The drain trap 30 is arranged after the strainer 20 by connecting the other end of the drain outlet pipe 26 connected to the drain discharge port 25 of the strainer 20. As a result, the drain D sent out via the strainer 20 is finally discharged to the outside by the action of the drain trap 30. A drain discharge pipe 33 for discharging the drain D to the outside is connected to the drain trap 30.

The drain discharge pipe 33 is composed of a hollow pipe for delivering the drain D, and is provided so that the drain D discharged from the air compressor 10 and the air dryer 12 is finally sent to the outside through the drain trap 30.

When an electromagnetic drain trap 30 is adopted as the drain trap 30 used in the present invention, the drain trap 30 is mainly composed of a solenoid valve 31 and a cycle timer 32. The solenoid valve 31 electromagnetically opens and closes the valve, and the cycle timer 32 controls the cycle and time of the opening and closing operation of the solenoid valve 31. That is, the cycle timer 32 controls the drain D discharge cycle as well as the drain D discharge time by the solenoid valve 31.

From each of the above components, the drain discharge structure in the air compressor 1 according to the present invention is configured. The flow of compressed air A in the present invention is as follows.
That is, in the air compressor 1, the compressed air A generated by the air compressor 10 is sent to the air dryer 12 through the piping path R. After that, the compressed air A is dried by the air dryer 12 to remove moisture, and then finally sent to air through the pipe line R, and is used for various purposes.

The flow of drain D in the present invention is as follows.
That is, in the air compressor 1, the drain D generated by the air compressor 10 is stored in the air compressor tank 11 and flows out to the compressor drain introduction pipe 14 through the drain hole 11a existing in the air compressor tank 11. Further, the drain D generated in the air dryer 12 is stored in the air dryer 12 and flows out to the dryer drain introduction pipe 16 through the drain hole 12a existing in the air dryer 12. Both the drain D in the compressor drain introduction pipe 14 and the drain D in the dryer drain introduction pipe 16 are taken into the strainer 20 from the drain introduction port 23 in the strainer base 22. In the strainer 20, the taken-in drain D is ejected from the drain ejection hole 24 into the strainer case 28, passes through the strainer element 27 built in the strainer case 28 from the outside to the inside, and becomes the strainer base 22. It flows out to the drain outlet pipe 26 through the provided drain discharge port 25. The drain D in the drain outlet pipe 26 passes through the drain discharge pipe 33 via the drain trap 30, and is finally discharged to the outside. Then, due to the closure of the drain trap 30 (non-open state), the discharge of the drain D is temporarily stopped.

The series of drain D flows in the present invention described above is a mode in which the entire drain trap 30 is pulled by a negative pressure to flow in a series in the discharge direction, and drains are individually performed between the devices. The outflow of D is not carried out.

As described above, in the drain discharge structure of the air compressor 1 according to the present invention, the drain D discharged from both the built-in air compressor 10 and the air dryer 12 is interposed with one strainer 20 and one machine. Since it is possible to discharge to the outside by the drain trap 30, and the drain trap 30 is not equipped on both the air compressor 10 and the air dryer 12, the simple structure contributes to the simplification of the device and is easy to maintain. It is useful for improving cost performance and functionality.

The present invention can be used in all fields where compressed air is used, as well as in food processing, finishing processing of precision equipment such as lenses, cleaning, and the like. Therefore, it is considered that the industrial applicability of the "drain discharge structure in the air compressor" according to the present invention is great.

1 Air compressor 10 Air compressor 11 Air compressor tank 11a Drain hole 12 Air dryer 12a Drain hole 14 Compressor drain introduction pipe 16 Dryer drain introduction pipe 17 Check valve 20 Strainer 22 Strainer base 23 Drain introduction port 24 Drain ejection hole 25 Drain discharge port 26 Drain outlet pipe 27 Strainer element 28 Strainer case 30 Drain trap 31 Solenoid valve 32 Cycle timer 33 Drain discharge pipe A Compressed air B valve D Drain R Piping line S Pressure gauge h Height

Claims (5)

It is a drain discharge structure in an air compressor including an air compressor and an air dryer, and also equipped with a strainer and a drain trap.
A compressor drain introduction pipe for discharging the drain generated by the air compressor is provided, and a dryer drain introduction pipe for discharging the drain generated by the air dryer is provided.
The strainer consists of a strainer base, a strainer element, and a strainer case in which the strainer element can be incorporated.
The strainer base is provided with two drain introduction ports to which a strainer element can be placed above and can be connected to a drain introduction pipe, and also corresponds to each drain introduction port capable of ejecting drain into the strainer case. It is equipped with a single drain outlet that can discharge drain that has passed through the strainer element, and is equipped with individual drain ejection holes.
The compressor drain introduction pipe and the dryer drain introduction pipe are connected to the strainer via the drain introduction port, and a drain trap is connected to the rear stage of the strainer via a drain outlet pipe connected to the drain discharge port.
A drain discharge structure in an air compressor, characterized in that both the drain discharged from the air compressor and the air dryer are sent to one strainer, and the drain is discharged to the outside by a drain trap through the strainer. The drain discharge structure in an air compressor according to claim 1, wherein a check valve is provided at a predetermined intermediate portion in the dryer drain introduction pipe. The drain discharge structure in the air compressor according to claim 1 or 2, wherein the air dryer is a refrigeration type air dryer. The drain discharge structure in an air compressor according to any one of claims 1 to 3, wherein the drain trap is an electromagnetic drain trap. The drain discharge structure in the air compressor according to claim 4, wherein the drain trap is equipped with a cycle timer.

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