JPH0562039B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a hydrostatic pressurizing apparatus for pressurizing an object to be treated (powder, etc.) at an ultra-high pressure in warm or hot conditions.

(Prior Art) To explain a conventional example of the ultra-high pressure type warm isostatic pressurizing device, as shown in FIG.
A top cover 13 is installed on the top of the cylindrical body 1.
A small-diameter piston 14a is slidably installed in the lower part of the cylinder 11 and serves as a lower lid to form a pressurizing chamber a inside. The small diameter piston 14a is integrally connected to the diameter piston 14b through the hole of the pedestal 29, and the conduit 16 which is erected at the inner end of the pressure path b provided at the bottom of the large diameter cylinder 15 is connected to the large diameter piston 14b. , the small diameter pistons 14a and 14b are fitted in a central hole, a check valve 17 is provided in the upper part of the same central hole, and the pressure increasing passage c provided in the lower part of the large diameter cylinder 15 is connected to the large diameter piston 1.
Pressure increasing unit 14a,...1 installed opposite to 4b
7, and the upper lid 13 is attached to a table 24 which can be moved up and down by rods 33 and 35 of upper and lower cylinders 32 and 34 (four in total).

Further, a heating furnace 18 containing an electric heating element is suspended from the lower side of the upper lid 13 by a hanging tool 25, and the heating furnace 18 is disposed in the pressurizing chamber a as shown in the figure. The bare conductor wire 19 is connected to an external power source (not shown) through through holes 13a, 13a provided in the upper cover 13, and further, as shown in FIG.
Reference numeral 9 denotes a seal ring 21a made of an elastic material such as synthetic rubber, and a back-up spring made of hard synthetic resin, which are supported by an insulating spacer 20 and fitted into the inner ends of the through holes 13a, 13a. 21b and 21c, and is tightened by a seal retainer 22 attached to the inner surface of the upper lid 13 with bolts, the through hole 13 is closed by the seal unit 21.
The inner ends of a and 13a are sealed.

In the figure, 30 is a spacer, and 31 is a yoke frame.

The conventional ultra-high pressure type warm isostatic pressurization device is
When the object d such as powder is housed in the heating furnace 18 and placed in the pressurizing chamber a, and subjected to warm pressure treatment at a temperature of, for example, 400°C, a liquid pressurizing medium is used. After supplying oil into the pressurizing chamber a from the pressurizing path b through the conduit 16 and the check valve 17 and sealing it at a high pressure of, for example, 2000 kg/cm ² , high-pressure oil is sent to the lower part of the large diameter cylinder 15 from the pressurizing path c. into large and small diameter cylinders 14a, b
is increased, the pressurizing medium in the pressurizing chamber a is compressed, and the pressure is increased to an ultra-high pressure of, for example, 10,000 Kg/cm ² , and the object to be processed d is subjected to warm pressurizing treatment.

When the pressure is increased, the seal ring 21a of the seal unit 21 is pressed by the seal presser 22 via the back-up spring 21b, as shown in FIG. is applied to seal the pressurizing chamber a, and the seal ring 21a is compressed into a flat shape by the ultra-high pressure of the pressurizing chamber a, increasing the surface pressure and completely sealing the pressurizing chamber a.

When the warm pressurization process is completed, the large and small diameter pistons 14a and 14b are lowered to lower the pressure in the pressurizing chamber a, and the pressurized medium is discharged by an appropriate means, and the spacer 30 is moved to the left in the figure on the table 24. The upper lid 13 and the heating furnace 18 are raised together with the table 24 onto the cylindrical body 11 using the upper and lower cylinders 32 and 34,
The structure is such that a processed object is obtained by moving the upper lid 13 and heating furnace 18 to the right in the figure.

(Problems to be Solved by the Invention) In the conventional ultra-high pressure type hydrostatic pressurization device, the seal structure at the part where the heating furnace conductor passes through the lid member has a very complicated structure consisting of a spacer, a seal unit, and a seal retainer. The seal unit requires a large installation space and is expensive, and the seal unit uses materials with poor heat resistance such as synthetic rubber and synthetic resin, so it is not recommended to use a hot type. There are problems such as difficulty in using it.

(Means for Solving the Problems) The present invention is an ultra-high pressure type hydrostatic pressurizing device for dealing with the above-mentioned problems. In an ultra-high pressure type hydrostatic pressurizing device formed in a pressurizing chamber, and in which a conductor of a heating furnace disposed in the pressurizing chamber is connected to an external power source through a through hole provided in one of the lid members, the through hole A tapered hole portion whose diameter is enlarged on the pressure chamber side is provided in the inner end portion of the hole, and a cone piece is fitted into the hole, and the sheath wire of the conductive wire is penetrated and brazed into the insertion hole provided in the cone piece. By installing a conductor sealing mechanism, it simplifies the conductor sealing mechanism of the heating furnace, reduces costs, improves heat resistance, sealing performance, and reliability, and improves the ultra-high pressure performance of the pressure chamber, that is, the hydrostatic pressurization performance. This solves the problems mentioned above.

(Function) A cone piece is inserted into the inner end of the through hole provided in the cover member of the cylindrical body with a tapered hole portion whose diameter is enlarged on the pressurizing chamber side, and a conductive wire is inserted into the insertion hole provided in the cone piece. Since the sheathed wire is inserted through and brazed, the structure of the conductor sealing mechanism is greatly simplified and the cost is reduced.It also has heat resistance, increases the contact area and surface pressure, and improves the sealing performance. Reliability has been improved, making it easier to increase the pressure in the pressurized chamber to ultra-high pressure.

(Embodiment) Fig. 1 and Fig. 2 show an embodiment of the present invention, in which a lid member 3 is installed on the upper part of the cylindrical body 11, and a small diameter piston 14a serving as the lid member is slidable on the lower part. The lid member 3 is provided with a sheath wire 2 of a conducting wire 2a connected to a heating furnace 18 equipped with an electric heating element disposed inside the pressurizing chamber a. External power supply via through hole 3a (not shown)
It is an ultra-high pressure type hydrostatic pressurization device connected to the

A large-diameter piston 14b of a large-diameter cylinder 15 provided on the lower side of the cylindrical body 11 via a pedestal 29.
The small-diameter piston 14a is integrally connected to the mount 29 through the hole, and the large-diameter cylinder 15
A conduit 16 erected at the inner end of the pressurizing path b provided at the lower part is fitted into the center hole of the large and small diameter pistons 14a and b, and a check valve 17 is installed at the upper part of the same center hole.
and a pressure increase passage c provided at the bottom of the large diameter cylinder 15.
The pressure increasing units 14a, . . . , 17 are provided opposite to the large diameter piston 14b.

The heating furnace 18 is suspended from the lower side of the lid member 3 by a hanging tool 25 and placed in the pressurizing chamber a, and the lid member 3 has upper and lower cylinders 32,
The lid member 3 is attached to a table 24 which is movable up and down by each of 34 (4 rods in total) 33 and 35, and the lid member 3 is mounted so as to be movable to the right in the figure by a guide mechanism provided on the table 24. There is. 30 in the diagram
is a spacer that is movable to the left in the figure on the table 24 and is disposed within the yoke frame 31.

Further, as shown in FIG. 2, the inner end portion of the through hole 3a provided in the lid member 3 has an enlarged diameter D from the hole diameter d on the pressurizing chamber a side, and has a taper angle θ (15° to 40°). A tapered hole portion 3b formed to a degree) is provided,
A metal cone piece 5 is fitted into the tapered hole 3b, and a sheath wire 2 consisting of a conducting wire 2a, an insulating material 2b and a metal sheath 2c is inserted into the insertion holes 6, 6 provided in the cone piece 5. The cone piece 5 has a structure in which a conductive wire sealing mechanism is provided by inserting the cone piece 5 through the cone piece 5 and brazing it 7a, and further applying brazing 7b (overlay) on the inner end side of the cone piece 5.

Since the embodiment of the present invention has the above-described configuration, the object d such as powder is heated in the heating furnace 18.
The inside of the pressurizing chamber a is brought to a warm and ultra-high pressure and pressurized by the same operation as in the conventional example.

During the pressurization process, the ultra-high pressure pressurizing medium in the pressurizing chamber a presses the inner surface of the cone piece 5, and the lid member 3
The outer circumferential tapered part of the cone piece 5 is brought into close contact with the tapered hole part 3b of the cone piece 5, thereby sealing the pressurizing chamber a so that the pressurized medium does not leak out.
Brazing 7 between the through holes 6, 6 and the sheath wires 2, 2
a and brazing 7b on the inner end side of the cone piece 5
(Silver solder) fixes and seals the sheath wire 2 and seals the pressurizing chamber a.

The taper angle θ of the tapered hole portion 3b is appropriately in the range of 15 to 40°, and by adjusting the taper angle θ, the pressure between the tapered hole portion 3b and the tapered portion of the cone piece 5 due to the pressure in the pressurizing chamber a is reduced. The surface pressure can be adjusted, and the length of the cone piece 5 can be adjusted by changing the inner diameter expansion D.
That is, by adjusting the contact area between the tapered hole portion 3b and the cone piece 5, it is possible to cope with a wide range of pressure within the pressurizing chamber a, and it is also possible to use gas as the pressurizing medium.

Although the above embodiment describes the case where the conductor is passed through the top cover provided at the top of the cylindrical body, it is also applicable to a structure where the conductor is passed through the lid member provided at the bottom of the cylindrical body. Ru.

(Effects of the Invention) The present invention has the above-mentioned configuration, and a tapered hole portion whose diameter is enlarged on the pressurizing chamber side is provided in the inner end portion of the through hole provided in the lid member of the cylindrical body, and the cone is formed. Since the cone piece is fitted and the conductor is inserted into the insertion hole provided in the cone piece and brazed, the structure of the conductor seal mechanism is greatly simplified and the cost is reduced, and it also has heat resistance. It can also be applied to hot treatment, and the contact area and surface pressure of the seal are increased and can be adjusted freely, improving sealing performance and reliability. It has been improved.

Although the present invention has been described above with reference to embodiments, it goes without saying that the present invention is not limited to such embodiments, and that various design modifications can be made without departing from the spirit of the present invention. .

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional view showing an embodiment of the present invention, FIG. 2 is an enlarged vertical cross-sectional view of 3 parts of the lid member shown in FIG. 1, FIG. 3 is a vertical cross-sectional view of a conventional example, and FIG. FIG. 2 is an enlarged vertical cross-sectional view of the lid portion of FIG. 1; a: Pressure chamber, 11: Cylindrical body, 2: Sheath wire, 2
a: conductive wire, 3: lid member, 3a: through hole, 3b: tapered hole portion, 5: cone piece, 7a, 7b: brazing, 18: heating furnace.

Claims (1)

[Claims] 1 A lid member is installed on the top and bottom of the cylindrical body to form a pressurized chamber inside the cylinder, and a conductor for a heating furnace placed inside the pressurized chamber is connected to the outside through a through hole provided in one of the lid members. In an ultra-high-pressure hydrostatic pressurizing device connected to a power source, a tapered hole portion whose diameter is enlarged on the pressurizing chamber side is provided in the inner end portion of the through hole, and a cone piece is fitted into the cone piece. An ultra-high-pressure hydrostatic pressurizing device, characterized in that a conductor sealing mechanism is provided in which the sheath wire of the conductor is inserted and brazed into the provided insertion hole.