JP2568817Y2 - Autoclave - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an autoclave for carrying a processed product or a sample into a closed pressure vessel and treating it at high temperature, high pressure or reduced pressure.

[0002]

2. Description of the Related Art In an autoclave, an inert gas such as nitrogen gas or argon gas is introduced into a pressure-resistant container provided with a circulating fan, heated to a predetermined temperature, and forcedly convected by a circulating fan to withstand pressure. Since a processed product or the like accommodated in the container is reacted at a high temperature and a high pressure, a high pressure tightness is required for the pressure-resistant container and the like.

[0003] For this reason, a sealed shaft in which a rotating shaft protruding out of the pressure-resistant container through the wall surface of the pressure-resistant container and an electric motor connected to the rotating shaft is hermetically attached to the pressure-resistant container. Airtight leakage in the pressure-resistant container is reliably prevented by being accommodated in the casing.

[0004]

The inert gas in the pressure-resistant container is mixed with air containing external moisture when carrying in and out the processed product. Therefore, high-pressure, high-temperature inert gas containing moisture leaking from the pressure-resistant container through the gap between the rotating shaft of the circulation fan and the bearing that pivotally supports the rotating shaft on the wall surface of the pressure-resistant container is placed in the closed casing. It is full.

On the other hand, since the bearing is heated to a high temperature by frictional heat due to rotation and an inert gas flowing from inside the pressure vessel, a cooling jacket is provided around the bearing and provided in the pressure vessel. A part of the cooling water circulated and supplied to the cooling device is supplied and cooled, but the closed casing provided adjacent to the cooling jacket is cooled by the cooling effect, and the outer peripheral surface of the closed casing is also cooled. The temperature of the inner wall of the closed casing is lower than the temperature of the inert gas containing moisture filled in the casing, in combination with the natural heat radiation from the casing.

[0006] Therefore, when the inert gas containing moisture touches the inner wall of the closed casing, it is cooled to a temperature lower than the dew point temperature, and the water vapor component is aggregated, and water droplets adhere to the inner wall to form a state of so-called dew condensation. . When the processing of the processed product is completed, the pressure inside the pressure-resistant container is rapidly reduced, so that the atmosphere in the closed casing is easily dewed due to adiabatic expansion. When the water droplets on the inner wall surface fall on the electric motor, the insulation of the power supply line of the motor, the drive coil, and the like is broken, and there is a risk of causing a short circuit or a short circuit. In addition, there has been a problem that water droplets cause corrosion on the inner wall of the closed casing and the electric motor.

Accordingly, the present invention provides an autoclave that prevents dew condensation in the closed casing, prevents electric leakage and short circuit of the electric motor due to water droplets, and does not cause corrosion of the inner wall of the closed casing. That is a technical issue.

[0008]

According to the present invention, an electric motor is connected to a rotating shaft of a circulation fan protruding out of a pressure-resistant container, and the rotating shaft and the electric motor are connected to the pressure-resistant container. In an autoclave that is housed in a closed casing that is hermetically attached to a container, a cooling coil that circulates a refrigerant supplied from outside the casing is provided on a lower side of the closed casing. A drain receiver for storing coagulated water dropped from the cooling coil is formed.

[0009]

According to the present invention, the water vapor component contained in the inert gas in the closed casing is condensed by the cooling coil provided on the lower side in the closed casing, and the condensed water is collected in the drain receiver. As a result, dew condensation does not occur on the inner wall of the sealed casing. Therefore, water drops do not fall on the electric motor, the occurrence of electric leakage and short circuit can be prevented, and the inner wall of the closed casing and the electric motor can be prevented from being corroded by the water drops.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be specifically described below with reference to the drawings. FIG. 1 is a cross-sectional view showing a main part of an autoclave according to the present invention, in which an electric motor 4 is connected to a rotating shaft 3 of a circulation fan 2 protruding out of a pressure-resistant container 1 and the electric motor 4 A cooling fan 5 for sending air to the cooling fan 4 for cooling is fixed.

The rotating shaft 3, the electric motor 4 and the cooling fan 5 are housed in a stainless steel sealed casing 6 which is hermetically attached to the pressure-resistant container 1. A bearing 7 for pivotally supporting the rotating shaft 3 housed in the closed casing 6 is provided with a cooling jacket 8 for cooling the bearing 7, and the cooling jacket 8 is provided in the pressure-resistant container 1. A part of the cooling water (refrigerant) 10 circulated and supplied to the cooling device 9 is supplied through the cooling pipe 11.

A gas introduction hole 12 having a diameter of about 20 cm is provided below the electric motor 4 in the closed casing 1.
Is provided, and a bowl-shaped drain receiver 13 is attached to a lower portion thereof. A cooling coil 14 formed by spirally winding a copper tube is disposed in the drain receiver 13, and a part of the cooling water 10 supplied to the cooling jacket 8 is provided in the cooling coil 14. It is supplied and discharged after circulating in the coil. Further, an automatic valve 14 that is opened and closed intermittently by a timer 16 is provided at the bottom of the drain receiver 13 so that the coagulated water 17 accumulated in the drain receiver 13 is periodically discharged.

The above is an example of the configuration of the present invention. Next, the operation will be described. First, after a processed product is loaded into the pressure-resistant container 1, the electric motor 4 is operated to rotate the rotary shaft 3.
Is rotated to rotate the circulation fan 2 and the cooling fan 5. At the same time, the cooling water 10 is circulated and supplied at a constant flow rate to the cooling jacket 8 adjacent to the closed casing 6 and the cooling coil 14 in the drain receiver 13 to cool the bearing 7 and the cooling coil 14 to 5 to 10 ° C. .

As the temperature and pressure in the pressure vessel 1 increase, the high temperature inert gas containing moisture flowing from the vessel 1 into the closed casing 6 is cooled by the cooling fan 5.
Circulates in the closed casing 6 by the
When the cooling coil 14 in the inside is touched, it is rapidly cooled to a temperature lower than the dew point temperature, and the water vapor component is aggregated to form water droplets.
And will accumulate. Therefore, since the inside of the closed casing 6 is dehumidified by the cooling coil 14, dew condensation does not occur on the inner wall of the closed casing 6 as in the conventional case. Corrosion of the inner wall and the electric motor due to the influence of water droplets can be reliably prevented.

The coagulated water 17 stored in the drain receiver 13
Is periodically discharged through an automatic valve 15 that is opened and closed intermittently by a timer 16. Since the pressure inside the closed casing 6 is high, when the automatic valve 15 is opened, the coagulated water 17 is vigorously discharged by the pressure, and the opening time of the valve can be extremely short. There is no possibility that the pressure inside the pressure vessel 1 will be reduced.

Further, since the cooling coil 14 is disposed in the drain receiver 13 recessed from the closed casing 6, water droplets generated in the cooling coil 14 may be scattered by the blowing of the cooling fan 5. Nor. In the present embodiment, a part of the cooling water 10 circulated and supplied into the pressure-resistant container 1 is supplied to the cooling coil 14. However, the present invention is not limited to this. May be provided. In the present embodiment, the cooling water is used as the refrigerant. However, the cooling may be performed by using a liquid gas such as R-12, and the cooling coil 14 may be provided with a cooling fin or the like to increase the dehumidifying efficiency. You may do it.

[0017]

As described above, according to the present invention, the water vapor component contained in the inert gas in the closed casing is aggregated by the cooling coil provided on the lower side in the closed casing. Since it is stored in the drain receptacle, dew condensation occurs on the inner wall of the sealed casing as in the conventional case, so that water drops do not fall on the electric motor, and it is possible to prevent the occurrence of electric leakage and short circuit. There is a very excellent effect that corrosion of the inner wall and the electric motor can be prevented.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a main part of an embodiment of an autoclave according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Pressure-resistant container 2 ... Circulation fan 3 ... Rotating shaft 4 ... Electric motor 6 ... Closed casing 10 ... Refrigerant (cooling water) 13 ... Drain receiver 14 ... Cooling Coil 17 ・ ・ ・ Coagulated water

Claims (1)

(57) [Scope of request for utility model registration] An electric motor (4) is connected to a rotating shaft (3) of a circulation fan (2) protruding out of the pressure-resistant container (1), and the rotating shaft (3) and the electric motor (4) are connected to each other. In an autoclave housed in a closed casing (6) hermetically attached to the pressure-resistant container (1),
A cooling coil (14) for circulating a coolant (10) supplied from outside the casing (6) is provided below the inside of the closed casing (6), and the cooling coil (1) is circulated.
An autoclave, wherein a drain receiver (13) for storing the coagulated water (17) dropped from 4) is formed.