JPH0341914Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a device for opening and closing a high-pressure container of a hydrostatic press, particularly for opening and closing a lower cover.

[Prior Art] A conventional hydrostatic press will be explained with reference to FIGS. 5 and 6. A pedestal 2 erected on a base frame 1 is equipped with a high-pressure container 3 that presses a workpiece by supplying high-pressure fluid thereinto. , fixed base frame 1
A hydraulic cylinder 5 is installed on the rail 4 laid above.
A frame body 6 is placed thereon so that it can be moved by.

The frame body 6 is provided with a space 7 which is penetrated in the front and back so as to be able to support the high pressure container 3, and above the space 7 is provided with a space 7 which can be opened and closed by a vertically oriented fluid pressure cylinder 8. A spacer 11 is provided which can be moved horizontally by means of an upper lid 9 and a horizontally provided hydraulic cylinder 10.

Further, at the bottom of the space 7 in the frame 6,
A pedestal 13 for receiving the lower lid 12 of the high-pressure container 3 is provided. Further, the lower lid 12 is elastically suspended from the lower end of the outer periphery of the high-pressure container 3 by a suspension bolt 14 via a disc spring 15, as shown in FIG. When not in operation, the lower cover 12 is attached to the cradle 13 by the hanging bolts 14 and disc springs 15.
The high-pressure vessel 3 is supported with a required distance S to the space 7, so that the high-pressure vessel 3 can be taken in and out of the space 7, and a large pressure P is maintained inside the high-pressure vessel 3. When applying pressure, the lower cover 12 is lowered against the disc spring 15 by the pressure P, and is supported on the pedestal 13. In the figure, 16 indicates a seal.

When pressing is performed using the above device, the spacer 11 is retracted from the upper part of the upper lid 9 by the fluid pressure cylinder 10, and the spacer 11 is moved back from the upper part of the upper lid 9 by the fluid pressure cylinder 8.
with the fluid pressure cylinder 5 in the uppermost position.
The frame body 6 is moved to the high pressure vessel 3 side by the frame body 6 so that the high pressure vessel 3 can be supported by the frame body 6, and the upper cover 9 is lowered by the fluid pressure cylinder 8. The upper part of the high-pressure container 3 is pressurized and sealed, a spacer 11 is inserted between the upper lid 9 and the frame 6 using the fluid pressure cylinder 10, and high-pressure fluid is fed into the high-pressure container 3 to store the workpieces inside. Perform isostatic pressing.

[Problems to be solved by the invention] However, in the above-mentioned hydrostatic press, the lower cover 12 is suspended and supported by the high-pressure vessel 3 via the suspension bolts 14 and the disc springs 15. Therefore, when removing the lower cover 12 to replace the seal 16 or perform other maintenance inspections, the frame 6 is not attached to the high pressure vessel 3.
After moving a jig such as a lower lid support device (not shown) equipped with jacks to the lower part of the lower lid 12 of the high-pressure vessel 3 in a state where it has been moved from the outer periphery, the hanging bolts 14 are removed and the lower lid 12 is removed. on the support device,
In addition, the lower cover 12 is lowered using a jack for maintenance, and when installing the lower cover 12, the operation is the reverse of the above, which has traditionally made maintenance extremely difficult and time-consuming. It had

The present invention has been developed in view of the above-mentioned conventional problems, and aims to facilitate maintenance work by opening the lower lid of a high-pressure container.

[Means for Solving the Problems] The present invention is an attempt to solve the above-mentioned technical frame, and includes a fixed lower lid of the high-pressure container on the outer periphery of the high-pressure container in which a work is stored and pressurized. A double rod type opening/closing cylinder is provided with one rod end connected to the lower cover for opening and closing, and an airtight seal is provided between the stopper provided at the tip of the other rod and the opening/closing cylinder with respect to the high pressure vessel. This invention relates to a high-pressure container opening/closing device for a hydrostatic press, characterized in that a collar is removably provided and has a length capable of supporting the lower lid in a fitted state in which the lower lid is held in place.

[Function] Therefore, the present invention has a safety function in which the stroke of the opening/closing cylinder is regulated to a small size by the collar during normal operations, and airtightness is always maintained by the seal, and the collar does not need to be removed during maintenance. This allows maintenance to be performed by lowering the lower cover with a larger stroke.

[Example] An example of the present invention will be described below based on the drawings.

Figures 1 to 4 show an example of the present invention.
A support bracket 17 is provided protruding from the outer periphery of the lower lid 12,
The lower end of the lower rod 19 of a plurality of vertical opening/closing cylinders 18 provided at equal intervals around the outer periphery of the high pressure container 3 is connected to the support bracket 17 via a connector 20 and a pin 20', and the lower lid 12 is opened and closed. It is supported by the fluid pressure of the cylinder 18.

The opening/closing cylinder 18 is of a double-rod type, and a stopper 23 is integrally provided at the upper end of an upper rod 22 that protrudes in the opposite direction to the lower rod 19 fixed to a piston (not shown) in the opening/closing cylinder 18. It is formed.

Further, on the outer periphery of the upper rod 22, a third,
As shown in Figure 4, the lower cover 1 is opened and closed by the opening/closing cylinder 18.
2 is drawn to the lower part of the high-pressure container 3 and the length L of the upper opening 22 protrudes to the upper part of the opening/closing cylinder 18 when it is closed, which is slightly larger than the distance S between the lower lid 12 and the pedestal 13. Between〓A(=S+α)
The collar 24 has a two-part structure with a shorter length.
is provided in a removable manner. B in the figure shows the stroke during maintenance and inspection, and the same symbols in the figure represent the same parts.

The opening/closing cylinder 18 is, as shown in FIG.
It has hydraulic pressure that can keep the lower lid 12 drawn to the lower end of the high-pressure container 3, and therefore always creates a gap S between it and the pedestal 13, so that the frame 6 can be inserted into and removed from the high-pressure container 3. It is becoming possible to do this.

Further, during operation, the lower lid 12 is pushed down by the large pressure P acting within the high-pressure container 3 and supported on the pedestal 13. In this way, the lower cover 12 is
Each time a stroke is made by the distance S, the distance A is set slightly larger than the distance S for this purpose.

When opening the lower cover 12 for maintenance,
The frame body 6 is moved from the state shown in the figure to open the lower part of the lower lid 12. At this time, even if the lower lid 12 is pushed down due to residual pressure in the high-pressure container 3, the collar 24 provided between the stopper 23 of the upper rod 22 and the opening/closing cylinder 18 allows only the distance A to be removed. It cannot be lowered and therefore the airtightness provided by the seal 16 is maintained.

After releasing the internal pressure of the high-pressure container 3, if the collar 24 of the two-piece structure is removed, the lower cover 12 can be lowered by the stroke B by the opening/closing cylinder 18. Therefore, the seal 16 can be replaced in this state. You can perform maintenance such as After maintenance, the lower lid 12 is raised by the opening/closing cylinder 18 to close the high pressure container 3, and the collar 24 is attached.

Note that the present invention is not limited to the above-mentioned embodiments, and various changes may be made without departing from the gist of the present invention.

[Effects of the invention] As described above, according to the high-pressure container opening/closing device for a hydrostatic press of the present invention, the lower lid of the high-pressure container is closed by a double-rod type opening/closing cylinder, and the outer periphery of the rod of the opening/closing cylinder is It has a removable collar to regulate the stroke of the opening/closing cylinder, so during normal work the stroke of the opening/closing cylinder is kept small to ensure airtightness at all times, and during maintenance. By removing the collar, the lower cover can be lowered with a large stroke and maintenance can be easily performed, which is an excellent effect.

[Brief explanation of drawings]

Fig. 1 is an overall front view of a hydrostatic press to which the present invention is applied, Fig. 2 is a view taken along the - arrow in Fig. 1, Fig. 3 is a side view showing details of an embodiment of the present invention, and Fig. 4. is a view in the direction of - arrow in Fig. 3, Fig. 5 is an overall front view showing an example of a conventional hydrostatic press, Fig. 6 is a view in direction of - arrow in Fig. 5, and Fig. 7 is a view of the part shown in Fig. 5. It is an enlarged sectional view. 1 is a base frame, 2 is a pedestal, 3 is a high pressure container, 4 is a rail, 5 is a fluid pressure cylinder, 6 is a frame, 7 is a space, 9 is an upper lid, 12 is a lower lid, 13 is a pedestal, 16 is seal, 17 is a support bracket;
18 is an opening/closing cylinder, 19 is a lower rod, 21 is a piston, 22 is an upper rod, 23 is a stopper,
24 indicates color.

Claims (1)

[Scope of utility model registration request] A double-rod opening/closing cylinder with one rod end connected to the lower lid is provided on the outer periphery of a fixed high-pressure container that stores and pressurizes a workpiece inside, and the other rod end is connected to the lower lid to open and close the lower lid of the high-pressure container. A collar is removably provided between the stopper provided at the tip of the cylinder and the opening/closing cylinder, and has a length capable of supporting the lower lid in a fitted state while maintaining an airtight seal against the high-pressure container. High-pressure container opening/closing device of hydrostatic press.