JPH01291093A - High-pressure device - Google Patents

Abstract

PURPOSE:To obtain an axial force supporting structure equipped with pawls, which is capable of coping with the increase of the internal pressure of a vessel or the enlargement of the size of a device sufficiently, by a method wherein tension bolts, arranged around the pressure vessel, and pressure medium such as hydraulic pressure or the like are employed in the title device while the tension bolts are stroked by utilizing the pressure medium when the vessel is released. CONSTITUTION:Hydraulic pressure ports 2a communicated with a hydraulic pressure source are provided at the vicinities of the penetrating parts of tension bolts on the lid plate 2 of a pressure vessel 1 and a piston 11 being operated by receiving the hydraulic pressure is received in the lid plate 2 while the stem 12 of the piston 11, through which a tension bolt 9 penetrates, is extended to the upper surface of an outer annular clutch 7 and is retained to the upper surface upon retaining it. Accordingly, a principal axial force is supported by the tension bolts 9 even though a part of it is supported by the outer annular clutch 7 in an axial force supporting means. Upon releasing the pressure vessel, the piston 11 and the stem 12 are stroked by hydraulic pressure from the hydraulic pressure port 2a and whereby a gap (d) may be obtained. The outer annular clutch 7 is turned along a long groove 8 under this condition and the pawl 1a of the pressure vessel 1 is deviated from the pawl 7a of the outer annular clutch 7 to move the position of the pawl 1a so as to coincide with the recess 7b of the outer annular clutch 7 and, thereafter, the vessel 1 may be released.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to various high-pressure devices including hot isostatic pressing (HIP) devices and cold isostatic pressing (CIP) devices. .

(Prior Art) High-pressure equipment is generally used to mold powders made of various materials such as various alloy powders and ceramic powders, and to sinter the molded bodies in a pressurized atmosphere. The device is equipped with a support frame that engages with upper and lower lids that seal the upper and lower openings of the container, since the axial force exerted by the internal pressure of the container is quite large.

However, in order to support such high pressure, in those that use a frame, it is necessary to take out the large diameter piping to create a high vacuum inside the container in a part that does not interfere with the movement of the frame. Not only is the direction limited, but
If this is to be used in a small-sized device, there will be restrictions on the number of members that protrude from the axis, which is not necessarily appropriate.

Moreover, in recent years, HIP has been used to remove sintering defects in cemented carbide products such as tags (tungsten carbide), but HIP has been used to remove sintering defects in these materials using the conventional 1000- A high pressure of ~2000 kg/d is not necessary, and a pressure of about 100 kg/d is sufficient at most, so a claw clutch structure is used instead of the support frame as the axial force support type of the pressure vessel.

The structure types of clutches with claws are horizontal, where the center axis of the container is horizontal, and vertical, where the center axis is vertical. An outer ring clutch (7)' is supported via part αa, and a heating element (3) and a heat insulating layer (4) are installed inside the outer ring clutch (7)'.
A pressure vessel (1) with a built-in pressure vessel (1) whose lower part is closed with a lid plate (2) via a sealing material (5) is inserted into the outer ring clutch (
The pressure vessel is attached and detached by rotating 7)' and aligning machined claws with the lower cover (2) and the pressure vessel (1).

A driving cylinder aS shown in FIG. 6 is installed in the outer ring clutch drive.

(Problems to be Solved by the Invention) However, when using the conventional claw clutch as described above, not only is it impossible to visually check the engagement state, but also the strength For this reason, the outer ring clutch becomes large and its weight inevitably increases, and the drive mechanism required to rotate the outer ring clutch also naturally becomes larger. Moreover, since the claw clutch is designed according to the internal pressure of the pressure vessel, the higher the pressure of the conventional claw clutch made of one piece, the lower the material yield.

The present invention deals with the actual situation of ridges, and provides an axial force support structure using a claw clutch that can sufficiently cope with an increase in the internal pressure of the container or an increase in the size of the device by incorporating axial force support using a tension bolt. The purpose is to provide

(Means for Solving the Problems) That is, the present invention is characterized in that it meets the above objectives by disposing an outer ring clutch around the outer periphery of a pressure vessel whose lower opening is sealed with a cover plate, and by rotating the clutch. In the above-mentioned claw clutch type high pressure vessel, the container is released by aligning the claws provided on the outer peripheral surface of the pressure vessel with the recesses between the claws of the outer ring clutch, and engaging the claws to lock and fix the container. A plurality of tension bolts are inserted at a plurality of positions around the pressure vessel by penetrating the cover plate and the outer ring clutch.

In this case, by inserting the tension bolt, a long groove is provided in the outer ring clutch so as not to hinder the rotation of the outer ring clutch, and the outer ring clutch is rotated along the long groove.

Further, in order to release the container, the tension bolt is made axially strokeable by a piston, stem, etc. using a pressure medium such as hydraulic pressure.

In order to adjust the clearance when the container is released, it is preferable to further insert a bell spring into the tension bolt according to the axial force generated by the internal pressure of the pressure container.

(Function) According to the device of the present invention as described above, the axial force of the pressure vessel can be supported by the tension bolt, and the strength of the tension bolt can be increased even when the internal pressure increases or the device becomes larger. This can be adequately addressed.

Next, when releasing the pressure vessel, the piston and stem are stroked using hydraulic pressure, etc. to create a gap, and in this state, the outer ring is rotated along the long groove by an appropriate drive means, and the claws of the outer ring and the claws of the pressure vessel are rotated. Slide to release the container.

(Embodiments) Hereinafter, embodiments of the apparatus of the present invention will be described with reference to the accompanying drawings.

1 to 4 show an example of the device according to the present invention,
Figure 1 is a cross-sectional view of the high-pressure device in the axial force support state, Figure 2
FIG. 3 is a sectional view of the high-pressure device in a released state, and FIG. 4 is a plan view of the same.

In these figures, a pressure vessel (1) has a heat insulating layer (4) and a heating element (3) such as a heater built therein, and its lower opening is closed by a cover plate (2) through a sealing material (5). It is sealed, and a pipe (6) for evacuation, etc. is connected to the lower part.

Of course, there are differences in the elements housed in this pressure vessel (1) depending on the old P, CIP, etc., but in the case of the old P treatment, a heat insulating layer and heating elements such as a heater are housed as shown in the figure. Isostatic pressure treatment is performed in a high temperature, high pressure atmosphere using an inert gas such as argon gas or nitrogen gas as a pressure medium.

(7) is an outer ring clutch disposed surrounding the outer periphery of the pressure vessel (1), and claws (7a) and recesses (7b) are alternately formed on the inner periphery as shown in FIG. A claw (1a) formed on the outer peripheral surface of the pressure vessel (1) is sandwiched between the lid plate (2) and the claw (1a) formed on the outer circumferential surface of the pressure vessel (1), and is rotatable by an appropriate driving means (not shown), The claw (1a) of the pressure vessel (1) is adapted to match the respective positions of the claw (7a) and the recess (7b) of the outer ring clutch, that is, the engaged position and the released position.

Therefore, in the present invention, in the above structure, a plurality of tension bolts (9) are provided around the pressure vessel (1), passing through the cover plate (2) and the outer ring clutch (7), as means for supporting the axial force of the pressure vessel. ) is installed, and this bolt (9
) is inserted into the long groove (8) of the outer ring clutch (7) so as not to interfere with the rotation of the outer ring clutch (7), and the gap ( In order to adjust the position (d) in Fig. 3, a bellows spring α is inserted, and the lower part is fixed to the lower surface of the cover plate (2).

The cover plate (2) is provided with a hydraulic boat (2a) connected to a hydraulic power source (not shown) near the tenurethane bolt insertion portion, and a piston that operates in response to hydraulic pressure from the hydraulic boat (2a). Ql) is housed in the cover plate (2), and its stem (2) is attached to the tension bolt (9).
is inserted into it and extends to the upper surface of the outer ring clutch (7),
When locked, it is locked to the upper surface.

Therefore, in the above-mentioned axial force support means, the outer ring clutch (
7), the main axial force is supported by the tension bolt (9).

In order to release the pressure vessel, a hydraulic boat (
The piston αυ and the stem (2) are stroked using the oil pressure from 2a) to obtain a gap (d) as shown in FIG.

In this state, the outer ring clutch (7) is rotated along the long groove (8), and the pawl (7) of the outer ring clutch (7) is rotated as shown in Fig. 4.
a) and the claw (1a) of the pressure vessel (1), and insert the claw (1a) of the pressure vessel (1) into the recess (7b) of the outer ring clutch (7).
) to release the container (1).

In addition, the adjustment of the gap (d) in this case is done in advance by the spring aω.
determined by.

In this way, axial force support of the pressure vessel can be achieved without particularly increasing the size of the outer ring clutch.

Although a vertical container with a vertical center axis is shown here, the device of the present invention is similarly applicable to a horizontal container with a horizontal center axis.

(Effects of the Invention) As described above, the present invention uses tension bolts arranged around the pressure vessel to support the axial force of the pressure vessel of a high-pressure device, and uses a pressure medium such as hydraulic pressure to release the vessel. The tension bolt is stroked, and since the tension bolt is the axial force support member of the high pressure vessel, it is sufficient to simply increase the strength of the tension bolt even when the internal pressure of the pressure vessel increases or the equipment becomes larger. There is no need to increase the size or weight of the outer ring clutch, and therefore there is no need to increase the size of the drive for the outer ring clutch.

Moreover, in the present invention, since the tension bolt and the outer ring clutch, which is the pressure receiving part, can be made independent, the number of driving parts is reduced and simplification is achieved when the container is attached and detached.

This improves productivity, which is a feature of the claw clutch method.
It sufficiently maintains the characteristics such as the ability to quickly open and close the container lid, and the ability to be used even when there are many protrusions from the lower lid, and makes the axial force support of the pressure container rational, and especially with the outer ring clutch. Since the outer ring clutch does not need to be enlarged for the tension bolt, the amount of machining is reduced (and this has the remarkable effect of reducing material waste).

In addition, in -a, the life of the sealing material that seals pressure in the old P and CIP is shorter than that in general furnaces such as vacuum furnaces, so it is extremely important to detect leaks, but the conventional claw clutch method However, in the case of the present invention, the connecting part between the pressure vessel and the lid plate is easily visible and cannot be inspected because it is difficult to see from the outside, and the appropriate timing for replacing the sealing material is missed. There are no concerns,
It is expected to be extremely effective and have practical effects as an axial force support means for a claw clutch structure.

[Brief explanation of the drawing]

1 to 4 show embodiments of the high pressure device of the present invention,
Figure 1 is a schematic cross-sectional view of the high-pressure equipment in a state where it supports axial force, Figure 2 is a plan view of Figure 1, Figure 3 is a schematic cross-sectional view of the high-pressure equipment in a state where the pressure vessel is released, and Figure 4 is a schematic cross-sectional view of the high-pressure equipment in a state where the pressure vessel is released. 3 is a plan view, FIG. 5 is a partial cross-sectional schematic diagram of a conventional high-pressure device, and FIG. 6 is a schematic plan view showing an outer ring clutch driving means. (1)...pressure vessel, (1a)...pressure vessel pawl, (2)...cover plate, (7)...outer ring clutch, (
7a)...Clutch pawl, (7b)...Clutch recess, (8)...Long groove, (9)...Tension bolt,
αω...Farewell, αυ...Piston, ■...
stem. Figure 1 Figure 2a Figure 3 Figure 4 Figure 5 Figure 6

Claims (3)

[Claims] 1. An outer ring clutch is disposed on the outer periphery of a pressure vessel whose lower opening is sealed with a lid plate, and a recess provided on the inner periphery of the outer ring clutch;
In a high pressure device in which the outer ring clutch is rotatable between a release position where claws provided on the outer peripheral surface of the pressure vessel at a lower position of the clutch are mated and a non-mating locking position, Long grooves are provided in the outer ring clutch at a plurality of positions, and a plurality of tension bolts are inserted through the long grooves of the cover plate and the outer ring clutch, and each of the tension bolts is movable in the axial direction thereof. A high-pressure device characterized by: 2. 2. The high-pressure device according to claim 1, wherein a bellows spring is inserted into the tension bolt to enable clearance adjustment when the pressure vessel is released. 3. 3. The high-pressure device according to claim 1, wherein the stroke of the tension bolt is performed by a piston or a stem using a pressure medium such as hydraulic pressure.