JPH058475Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an improvement of a heating device using an energizing heater in a hot isostatic press.

(Prior Art) In a hot isostatic press (HIP device), a pressure vessel and an upper lid tightly fitted into the upper and lower openings of the vessel,
An electric heating heater is installed as a heating device in the high-pressure processing chamber formed by the lower lid, and when performing high-temperature processing of about 2000°C, a graphite heater is used as the heater. This is known, for example, as disclosed in Japanese Utility Model Application Laid-Open No. 58-78939, and generally a heater element having a substantially cylindrical shape is used. That is, FIGS. 4 and 5 1 and 2,
As an example is shown in FIGS. 1 and 2, it is composed of a pressure vessel 6, an upper cover 7 and a lower cover 8 which are removably fitted to the upper and lower openings of the vessel 6 via packing etc. A heat insulating layer 1 and a heat insulating table 4 are provided in the high pressure processing chamber 9.
Heater element 2 made of graphite
The electrode rod 3 is connected by a bolt 5 as is known, and the element 2 is shown in detail in FIGS. 1, 2 and 6. , the top part 11 and the inner cylinder 1
2. In a double cylindrical element main body having a substantially U-shaped cross section and consisting of an outer cylinder 13, from the lower end of the inner cylinder 12 through the top 11 to the lower part of the outer cylinder 13;
A large number of slits 2a, 2b extending from the lower end to the top 11 to the lower part of the inner cylinder 12 are alternately arranged in a staggered manner to form an element structure with double internal and external bending, and an electrode rod at both ends. 3 and 3, and as shown in the above-mentioned Japanese Utility Model Application Publication No. 58-78939, which is not shown in the drawings, a single cylindrical element main body is provided. A single type is also used in which a large number of slits are similarly arranged in alternating rows from the upper and lower edges.

(Problems to be Solved by the Invention) The heater element used in the prior art described above has the following problems. That is, in the conventional cylindrical type heater element, a considerable height is required parallel to the height direction of the high-pressure processing chamber 9, so that the effective height H of the processing chamber 9 shown in FIG. 4 is limited. This has the disadvantage that the volume required for high-pressure and high-heat treatment is significantly reduced, and the double cylindrical structure shown in Figures 4 to 6 1 and 2 has a complicated shape. Therefore, the cost is high, and furthermore, the heater element 2
Even if a part of the element is worn out, the entire element must be replaced with a new one, especially in the high-pressure processing chamber 9.
Reducing the effective volume of the device is a major problem.

(Means for Solving the Problems) In order to solve the above problems, the present invention uses a flat heater element instead of a cylindrical heater element. , in the high-pressure treatment chamber of the hot isostatic press.
In a heating device equipped with an energizing heater, the element of the heater is formed by arranging a large number of slits parallel to each other and alternately from the symmetrical periphery in the shape of a cut in a flat main body, and the plate surface of the element is arranged in a shape of a container. The heater element is arranged perpendicularly to the axial direction at the bottom of the high-pressure processing chamber, furthermore, an electrode rod connecting portion is provided at both ends of the element, and a plurality of the heater elements are arranged in the height direction of the high-pressure processing chamber. They are arranged in parallel layers and connected in series or in parallel via electrode rod connection parts.

(Function) According to the above-mentioned technical means of the present invention, as shown in FIGS. ), one side of the corresponding periphery divided into two from the center has a slit 15a, and the other side has a slit 15b.
By arranging them alternately and alternately in parallel, a flat element 17 whose strip-shaped sides are repeatedly bent and connected is formed so that its plate surface is perpendicular to the axial direction of the container and placed in the lower part of the high-pressure processing chamber. At the same time, electrode rod connecting parts 16,
By forming the heater element 16, the element height is limited to the thickness of the disc-shaped main body 15 compared to the conventional heater element, so it is possible to make the element height extremely low. The flat element 17 is used as heater elements 17a and 17b as illustrated in FIG.
A required number of electrodes are layered in parallel in the height direction of the high-pressure processing chamber 9 in the pressure vessel 6 as shown in FIG. 16, 16 are arranged in a corresponding manner, and the electrode rods 18, 18 are commonly connected to each connecting portion 16, 16 sets. Even when obtaining the required resistance value, it is possible to obtain the same resistance value at a lower overall height than that of a conventional cylindrical heater element. Furthermore, when a plurality of heater elements 17 are used as shown in the second figure, when an individual heater element 17 wears out, it is not necessary to replace the whole heater element, but only the worn one needs to be replaced, which saves time in manufacturing the element itself. However, since the structure is simpler than the conventional one, it is economical and inexpensive.

(Example) A suitable example of the heater element according to the present invention will be described with reference to FIGS. 1, 2 and 3.

1, 2, and 2, the flat main body 15 is disk-shaped in the embodiment, but this corresponds to the shape of the high-pressure processing chamber 9 in the pressure vessel 6 being a cylindrical space. This is a disk having a similar shape, and is not necessarily limited to a disk. In the main body 15, as shown in FIG.
are arranged parallel to each other in a staggered manner with a length that does not reach the periphery of the other party. The plate surface of the element 17 is arranged at the lower part of the high pressure processing chamber with the plate surface perpendicular to the axial direction of the container, and electrode connecting parts 16, 16 having mounting holes 16a at both ends perpendicular to the groups of slits 15a, 15b in the element 17 are provided. The heater element 17 is formed in a symmetrical position and in a protruding shape, and the dimensional size of the heater element 17 is appropriately set according to the cross-sectional diameter of the high-pressure processing chamber 9. For example, if the diameter of the main body 15 is 90 mm, , and is said to be approximately 10mm thick.

A plurality of heater elements 17 shown in FIG.
In an embodiment in which the required resistance value is obtained by layering
In the figure, two heater elements 17a and 17b are shown.
In the case of parallel connection, the required number of heater elements 17a, 17b, etc. are connected in parallel, as shown in the figure, and the electrode rod connecting portions 16, 16 are placed in the upper and lower corresponding positions. The rod-shaped connecting portions of the + electrode rods 18 are commonly inserted across the 16 pairs of connecting portions on one side using the mounting holes 16a,
The rod-shaped connecting portions of the negative electrode rods 18 are similarly inserted across the 16 pairs of connecting portions on the other side. Furthermore, when connecting a plurality of heater elements 17 in series, for example, when three heater elements 17a, 17b and 17c are connected in series, each All of the elements 17a to 17c are connected to their electrode rod connecting portions 1.
6 and 16 in corresponding positions, and the electrode rod 18 is connected to one connecting part 16 in the lowest element 17a, and between the connecting part 16 and the corresponding connecting part 16 in the next element 17b. An insulator 19 is interposed in the element 17a.
An insulator 19 is provided on the other connecting portion 16, and the connecting portion 16 and the next element 1 are
A conductor 2 is connected between the corresponding connecting portions 16 in 7b.
0, and then this element 17b is connected to one connecting portion 16 in the element 17b as shown in the figure in the uppermost element 17c.
A conductor 20 is interposed between this and the connecting portion 16 of the corresponding upper element 17c, and similarly the other connecting portion 16 of the element 17b and the connecting portion 16 of the corresponding upper element 17c.
An insulator 19 is interposed between each layered element 17 so that the other electrode rod 18 is connected to the mounting hole 16b of the connecting portion 16 which is parallel to the mounting hole 16a. The body 19 and the conductor 20 are interposed alternately, and electrode rods 18 and 18 are placed on the lowest element 17a and the highest element 17c, respectively.
By connecting the elements, a series connection type is easily possible regardless of the number of elements.

(Effects of the invention) According to the invention, the disadvantage of reducing the effective volume of the high-pressure processing chamber 9 required for high-temperature and high-pressure processing due to the high element height as in the past is eliminated,
It is extremely advantageous in that it is easy to significantly reduce the overall height of the element, thereby increasing the effective volume of the processing chamber.
In order to obtain the same resistance value as a conventional cylindrical heater element, the required number of heater elements 1
It is particularly advantageous that even in the case of layering 7, the height can be much lower than before. Furthermore, even if an accident occurs in which one heater element 17 is partially worn out, it is sufficient to replace only the worn element, and the structure of the element itself is significantly simplified, making it easy to manufacture and cost-effective. .

[Brief explanation of the drawing]

Fig. 1 is a plan view of the embodiment of the present invention, Fig. 1 is a side view of the same, Fig. 2 is a longitudinal sectional front view of the main part of the same layered state example, and Fig. 3 is the main part of the same series connection example. 4 is a vertical sectional front view of a prior art example, FIG. 5 1 is a plan view of the same element, FIG. 5 2 is a sectional view taken along line A-A in FIG. 5 1, and FIGS. 6 1 and 2 These are internal and external side views of the same unfolded state. 15... Flat main body, 15a, 15b... Slit, 16... Connection portion, 16a, 16b... Mounting hole, 17... Heater element, 18... Electrode rod, 19... Insulator, 20... conductor.

Claims (1)

[Scope of claims for utility model registration] (1) In the high-pressure treatment chamber of a hot isostatic press,
In a heating device equipped with an energizing heater, the element of the heater is formed by arranging a large number of slits parallel to each other and alternately from the symmetrical periphery in the shape of a cut in a flat main body, and the plate surface of the element is arranged in a shape of a container. A heating device for a hot isostatic press, characterized in that the heating device is disposed perpendicularly to the axial direction at the bottom of a high-pressure processing chamber, and further includes electrode rod connecting portions provided at both ends of the element. (2) A hot heating system according to Claim 1 of the Utility Model Registration Claim, in which a plurality of heater elements are layered in parallel in the height direction of the high-pressure processing chamber and are connected in series or in parallel via electrode rod connecting portions. Hydrostatic press heating device.