JPH1038470A - Cartridge with mechanism for rapid quenching of specimen - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cartridge having a specimen quenching mechanism in a furnace, which makes it possible to cool the cylindrical hollow cartridge for specimen rapidly, to make more uniform the speed of cooling of the cartridge for specimen in the axial direction, and, as a result, to achieve better uniformity of the temperature distribution in the axial direction at the time of rapid quenching. SOLUTION: The subject relates to a device comprising a specimen-containing container 12 which is a hollow cylinder for a specimen to be contained under seal inside and a specimen-containing cartridge 14 formed as a hollow cylinder which encloses the specimen-containing container at some distance thereto around and is designed for a cooling gas 9 to flow through the clearing C. The specimen-containing cartridge is inserted in a soaking pit where a specimen in the specimen-containing container, with this container 12 held concentrically with the specimen-containing cartridge, is evenly heated. The inner surface of the specimen-containing cartridge is such that the clearing C, which it forms from the specimen-containing container 12, becomes gradually smaller from the upstream side downstream and this clearing C is so prescribed as to make the heat-transfer coefficient larger with shift of the position under consideration downstream.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sample cartridge for rapidly cooling and solidifying a sample heated and melted in a sample cartridge mounted on a heating device such as an electric furnace in a space material experiment or the like. And a cartridge with a quenching mechanism.

[0002]

2. Description of the Related Art As a means for cooling a sample heated to a high temperature, an inert gas such as helium is sealed in an electric furnace at the same time as heating is completed, and heat transfer by the gas is used to cool the outer wall of the electric furnace. There is a means for exhausting heat using a water cooling pipe or a water cooling jacket provided. However, in this case, since the cooling gas is sealed in the high-temperature electric furnace immediately after the end of the heating, the electric furnace itself has a much larger heat capacity than the cartridge, so that the cooling rate of the sample is at most about 1 ° C./sec. The required cooling rate was not obtained. Therefore, a "cartridge with a quenching mechanism" in which a cooling gas is blown to the cartridge after heating is proposed by the same applicant as the present invention (Japanese Patent Application Laid-Open No. Hei 8-68593).

FIG. 3 is a view showing a cartridge provided with a quenching mechanism proposed in Japanese Patent Application Laid-Open No. 8-68593. The cartridge with a quenching mechanism shown in FIG.
, A header 5 having a cooling gas inlet port 3 and a cooling gas outlet port 4 attached to one end of the sample cartridge 2, and attached to the other end of the sample cartridge 2. A cooling gas outward passage 7 communicating with the cooling gas inlet port 3 of the header 5;
And a cooling gas return passage 8 communicating with the cooling gas outlet port 4 of the header 5. With this configuration,
The sample in the sample cartridge 2 is heated in a heating furnace together with the sample cartridge 2, and at the same time as the heating is completed, a cooling gas flows from the cooling gas inlet port 3 of the header 5 to the cooling gas outward passage 4 of the sample cartridge 2. The gas can be discharged from the cooling gas outlet port 4 through the gas return passage 8. That is, the cooling gas can be cooled by flowing into the sample cartridge 2 main body without enclosing the cooling gas in the heating furnace, and the sample can be rapidly cooled.

[0004]

However, in the above-described cartridge with a quenching mechanism, although the sample cartridge can be quenched, the difference in cooling speed in the sample axis direction is large. There was a problem that occurred. That is, in the cartridge with the quenching mechanism described above, the cooling gas is rapidly cooled by flowing the cooling gas into the gap surrounding the sample cartridge. However, since this gap is constant in the sample axis direction, the cooling on the upstream side becomes strong, and the temperature uniformity deteriorates. There was a problem to do.

The present invention has been made to solve such a problem. That is, an object of the present invention is to rapidly cool a hollow cylindrical sample cartridge and to make the axial cooling rate of the sample cartridge more uniform, thereby making the axial temperature distribution during quenching more uniform. It is an object of the present invention to provide a cartridge with a sample quenching mechanism in a soaking furnace.

[0006]

According to the present invention, according to the present invention, a hollow cylindrical sample container in which a sample is sealed, the sample container is surrounded at a distance, and a cooling gas flows through a gap between the sample container and the sample container. And a hollow cylindrical sample cartridge, wherein the sample cartridge is inserted into a soaking furnace for uniformly heating the sample in the sample container,
The sample quenching mechanism, wherein the sample container is held concentrically with the sample cartridge, and an inner surface of the sample cartridge is configured such that a gap between the sample container and the sample container gradually decreases from an upstream side to a downstream side. An attached cartridge is provided.

According to a preferred embodiment of the present invention, the gap between the sample cartridge and the sample container is set such that the heat transfer coefficient α determined from the temperature and the flow velocity of the cooling gas flowing through the gap increases toward the downstream. ing. The sample cartridge includes a hollow tube and a sleeve tube fixed in the hollow tube, and the sleeve tube is formed as a tapered tube having a narrow downstream side.

According to the configuration of the present invention, the inner surface of the sample cartridge is configured such that the gap between the sample container and the sample container gradually decreases from the upstream side to the downstream side. By setting the transmissivity α to be larger toward the downstream, the velocity of the cooling gas flowing along the rod-shaped sample axis can be forcibly distributed in the axial direction,
The cooling performance on the sample surface can be made uniform in the axial direction. Therefore, at the time of cooling the rod-shaped sample, it is possible to secure better temperature uniformity together with rapid cooling.

Further, the sample cartridge comprises a hollow tube and a sleeve tube fixed in the hollow tube, and the sleeve tube is formed as a tapered tube having a narrow downstream side, so that the cooling performance of the downstream portion of the sample is improved. The temperature can be improved and the sample temperature can be made more uniform.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. In the drawings, common parts are denoted by the same reference numerals. FIG. 1 is a configuration diagram of a cartridge with a sample quenching mechanism according to the present invention.
In this figure, a cartridge 10 with a sample quenching mechanism of the present invention has a hollow cylindrical sample container 1 in which a sample is sealed.
2 and a hollow cylindrical sample cartridge 14 surrounding the sample container 12 with a space C therebetween.

The sample cartridge 14 is configured such that the cooling gas 9 flows through a gap C between the sample cartridge 14 and the sample container 12. The sample cartridge 14 is inserted into a soaking furnace (not shown) for uniformly heating the sample in the sample container 12.

In FIG. 1, a sample container 12 is held by a support member 13 concentrically with a sample cartridge 14. The support member 13 is provided with a plurality of through portions in the circumferential direction, through which the cooling gas 9 can freely pass. In this example, the sample cartridge 14 includes a hollow tube 14a and a sleeve tube 14b mounted in the hollow tube 14a. The sleeve tube 14b is formed as a tapered tube having a narrow downstream side. Is configured such that the gap C with the sample container 12 gradually decreases from the upstream side to the downstream side.

FIGS. 2A and 2B are schematic diagrams showing the temperature distribution and the flow velocity distribution in the cartridge. FIG. 2A shows the temperature distribution and FIG. 2B shows the flow velocity distribution. As shown in FIG. 2A, as the gas flows from the upstream side to the downstream side of the sample container 12, the temperature of the cooling gas 9 increases with the cooling of the sample container 12. The degree of this temperature rise can be adjusted to some extent by the flow rate of the cooling gas 9 and the initial temperature. On the other hand, as shown in FIG. 2B, the flow rate of the cooling gas 9 also increases as it flows from the upstream side to the downstream side of the sample container 12. As described above, the gap C between the sample container 12 and the sample container 12 is configured to gradually decrease from the upstream side to the downstream side. Therefore, the degree of the speed increase is sharply increased as compared with the conventional case.

According to the present invention, the sample cartridge 14
The gap C between the sample tube 12 and the sleeve tube 14b is set such that the heat transfer coefficient α determined by the temperature t and the flow velocity v of the cooling gas flowing through the gap C increases toward the downstream. This configuration can be implemented by adjusting the temperature t of the cooling gas 9 based on the flow rate and the initial temperature of the cooling gas 9 and changing the inner surface shape of the sample cartridge 14 to adjust the flow velocity v.

It should be noted that the present invention is not limited to the above-described embodiment, and it is needless to say that various changes can be made without departing from the spirit of the present invention.

[0016]

According to the structure described above, the inner surface of the sample cartridge 14 is configured such that the gap C between the sample container 12 and the sample container 12 gradually decreases from the upstream side to the downstream side. By setting the heat transfer coefficient α to be larger toward the downstream, the velocity of the cooling gas 9 flowing along the rod-shaped sample axis can be forcibly distributed in the axial direction, and the cooling performance on the sample surface can be reduced in the axial direction. The temperature can be made nearly uniform, and when cooling the rod-shaped sample, better uniformity of temperature can be secured together with rapid cooling.

Therefore, the cartridge with the sample quenching mechanism of the present invention can rapidly cool the hollow cylindrical sample cartridge and can make the cooling rate of the sample cartridge in the axial direction more uniform. It has an excellent effect that the temperature distribution in the direction can be made more uniform.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a cartridge with a sample quenching mechanism according to the present invention.

FIG. 2 is a diagram showing a temperature distribution and a flow velocity distribution in a cartridge.

FIG. 3 is a configuration diagram of a conventional cartridge with a quenching mechanism.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sample storage room 2 Sample cartridge 3 Cooling gas inlet port 4 Cooling gas outlet port 5 Header 6 Sealing cap 7 Cooling gas outward passage 8 Cooling gas return passage 9 Cooling gas 10 Cartridge with sample quenching mechanism 12 Sample container 13 Support member 14 Sample Cartridge 14a Hollow tube 14b Sleeve tube

Claims (3)

[Claims] 1. A hollow cylindrical sample container having a sample sealed therein, a hollow cylindrical sample cartridge surrounding the sample container at an interval, and allowing a cooling gas to flow through a gap between the sample container and a hollow cylindrical sample cartridge. The sample cartridge is inserted into a soaking furnace for uniformly heating the sample in the sample container, and the sample container is held concentrically with the sample cartridge, and the inner surface of the sample cartridge is Wherein the gap with the sample container is gradually reduced from the upstream side to the downstream side. 2. The sample cartridge is characterized in that the gap between the sample cartridge and the sample container is determined such that the heat transfer coefficient α determined from the temperature and the flow velocity of the cooling gas flowing through the gap increases toward the downstream. The cartridge with a sample quenching mechanism according to claim 1. 3. The sample cartridge comprises a hollow tube and a sleeve tube fixed in the hollow tube, and the sleeve tube is formed in a tapered tube having a narrow downstream side. The cartridge with a sample quenching mechanism according to 1.