JPH047493Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a cooling structure for cooling a liquid that is heated to a high temperature and is stored in a container, and in particular for cooling working oil that is circulated in machine tools. The present invention relates to a cooling structure for liquid in a container suitable for maintaining the liquid at an appropriate temperature.

[Prior Art] Generally, working oil such as lubricating oil or cutting oil used in machine tools is provided in a container near the machine tool and circulated by a hydraulic pump and oil piping. During machining, when these working oils become hot, their functionality as working oils deteriorates, so it is common practice to install a cooler device near the machine or use a radiator or fan to cool the containers or piping. was.

These methods require space to install them near the machine tool, are expensive for equipment, and have problems in that they require extra manpower and time to manage the equipment.

[Problems to be solved by the invention] The present invention solves the above problems by using a small vortex tube with good cooling effect to cool and maintain the liquid in the container at an appropriate temperature.
To provide a cooling structure for liquid in a container that is inexpensive and easy to maintain.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a cooling structure for a liquid in a container that cools a high-temperature liquid in a container. Cold air from a vortex tube is provided, in which a hollow tube having an entrance and exit on the outside is fixedly disposed in the container, and inside the inlet of the hollow tube, cold air and hot air are separated and formed by supplying high pressure air. The air introduction pipe, which is inserted at the outlet side and introduces high-pressure air into the vortex tube, is provided with a control mechanism that detects the temperature and opens and closes the pipe in order to keep the temperature inside the container constant. This constitutes a cooling structure for the liquid in the container.

[Example] Hereinafter, an example of the present invention will be described based on the drawings.

First, the vortex tube will be explained. The Vortex tube is a well-known low-noise cooling device based on a patent developed by Vortex Corporation of the United States, and its configuration is shown in FIG.

A vortex generating chamber 6 having an air inlet 3 and a cold air outlet 4 is connected to one end of the main body 2 of the vortex tube 1, and a hot air outlet 5 is connected to the other end. A generator 7 having a nozzle is provided within the vortex generation chamber 6. High-pressure air entering from the air introduction pipe 3 is discharged tangentially around the vortex generation chamber 6 at sonic speed by a nozzle.
Further, a control valve 8 is provided at the center of the hot air outlet 5.

High-pressure air is supplied from the air inlet 3, and is discharged tangentially around the vortex generation chamber 6 at the speed of sound by a nozzle formed in the generator 7, expanding, and rotating at high speed to form a vortex flow toward the main body 2. , further in the direction of the control valve 8. At this time, a large centrifugal force acts on the outer swirling air, causing the pressure and density to rise rapidly, increasing resistance and raising the temperature. Therefore, the inside air is deprived of temperature and the air temperature decreases. The cooled air travels in the opposite direction and is discharged from the cold air outlet 4. On the other hand, the heated outer swirling air is discharged from the hot air outlet 4. Note that by adjusting the control valve 8, the temperature can be adjusted over a wide range.

Next, an embodiment of the present invention in which a vortex tube 1 is attached will be described.

As shown in FIG. 1, hollow tubes 13 are arranged in a plurality of rows in a container 12 for storing working oil used in a machine tool 16 and have ports opening to the outside of the container so as to be in contact with the working oil. is fixedly arranged in the container 12. A cold air outlet 4 of the vortex tube 1 connected to an air introduction pipe 9 for introducing high-pressure air is inserted into the inlet of the hollow pipe 13. Therefore, the hot air outlet 5 of the vortex tube 1 is open to the outside of the container 12. A throttle valve 11 and a solenoid valve 10 are interposed in the air introduction 9, and the solenoid valve 10 is connected to a temperature detector 14 inside the container 12. In addition, the throttle valve 11 and the solenoid valve 10
and the temperature detector 14 constitute a control mechanism section. The control mechanism section is for maintaining the working oil in the container 12 at a constant temperature. The working oil in the container 12 is piped to the machine tool side by a hydraulic pump 15, and is also discharged into the container 12 for circulation.

The cold air generated by the vortex tube 1 enters the hollow tube 13 from the cold air outlet 4 and cools the working oil that comes into contact with the hollow tube 13 while being discharged from the outlet of the hollow tube 13. The cooled working oil is transferred to hydraulic pump 1.
5, the working oil is sent to the machine tool side, used in the machine tool side, and has reached a high temperature. The working oil is discharged to an appropriate position in the container 12, and is circulated in the container 12 while being cooled by contacting the hollow tube 13. It is again sent to the machine tool by the hydraulic pump 15.

When machining is performed with a machine tool and it is detected that the working oil in the circulating container 12 has reached a temperature higher than the temperature set on the temperature detector 14, the solenoid valve 10 is opened by the detection signal and high pressure is generated. Air is sent to the vortex tube 1 and cold air flows into the hollow tube 13 and flows through the tube to cool the working oil in the container 12. When the working oil temperature falls below the set temperature, the solenoid valve 10 is closed in response to a detection signal from the temperature detector 14, and the supply of high pressure air to the vortex tube 1 is stopped. As described above, the temperature of the working oil in the container 12 is always maintained based on the set temperature and automatically adjusted. Further, the temperature of the cold air from the vortex tube 1 can be adjusted by automatically adjusting the control valve 8 or the throttle valve 11.

As mentioned above, the working oil in the container 12 is automatically adjusted to a constant temperature and cooled by the arrangement of the vortex tube 1 and the hollow tube 13 in the container 12, and the air introduction pipe 3 for high-pressure air. Therefore, unlike the conventional technology, there is no need for a special cooler or the like. Therefore, space can be reduced, implementation can be carried out at low cost, maintenance management is easy, and cooling efficiency of working oil can be improved.

[Effects of the invention] As is clear from the above explanation, according to the invention, the liquid in the container is reliably cooled, and the temperature of the circulating working oil is always maintained at an appropriate constant temperature. , it is possible to increase the effect of improving processing quality and work efficiency.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional configuration diagram of one embodiment of the present invention;
The figure is a cross-sectional configuration diagram of another embodiment of the present invention, and FIG. 3 is a cross-sectional explanatory diagram of a vortex tube. 1...Vortex tube, 2...Main body, 3
...Air inlet, 4...Cold air outlet, 5...Hot air outlet, 6...Vortex generation chamber, 7...Generator, 8...Control valve, 9...Air introduction pipe,
10... Solenoid valve, 11... Throttle valve, 1
2...Container, 13...Hollow tube, 14...Temperature detector, 15...Hydraulic pump, 16...Machine tool.

Claims (1)

[Scope of utility model registration request] In a cooling structure for a liquid in a container that cools a high-temperature liquid in a container, a hollow tube that is placed in contact with the liquid and has an inlet/outlet outside the container is fixedly disposed in the container. At the same time, the cold air outlet side of a vortex tube that separates and forms cold air and hot air by supplying high-pressure air is inserted into the inlet of the hollow tube, and an air introduction tube that introduces high-pressure air into the vortex tube is provided. A cooling structure for liquid in a container, characterized in that a control mechanism section is provided for detecting the temperature and opening/closing a conduit in order to keep the temperature inside the container constant.