JPS6159239A - Apparatus for testing pressure resistance of container - Google Patents

Abstract

PURPOSE:To enable the partial pressure resistance test of a container simply and easily, by providing a bag body equipped with a liquid supply pipe and having extensibility to the space of the container and supplying a liquid into the bag body to pressurize the space. CONSTITUTION:An air-tight space 13 is formed in the nozzle 2 of a pressure container 1 by an upper lid 5 having a shaft rod 10 suspended therefrom and the middle lid 12 attached to the lower end of the shaft rod 10. Next, a bag body 14 having extensibility is provided in the space 13 to be supported by the shaft rod 10 and a liquid supply pipe 15 is connected to the bag body 14. When a pressurized liquid is supplied into the bag body 14 by the liquid supply pipe 15, the space 13 is pressurized through the bag body 14 and the quality of the welding joint 2a of the nozzle 2 can be tested. By this method, it is unnecessary to apply the pressure of the liquid to the whole of the pressure container 1 in performing the partial pressure resistance test of the pressure container 1 and a partial test can be performed simply.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a pressure test device for containers such as pressure vessels.

[Prior art and some problems]

For example, as shown in Fig. 2, the pressure resistance test of the pressure vessel 1 is carried out on a predetermined test point on the entire pressure vessel, even if the test location is only a small part of the whole pressure vessel, such as the nozzle 2 that has been repaired by welding. This was done by applying a fluid pressure of . For this reason, the test is large-scale, and the time and cost required for the test are large. In addition, the inside of the container may be dry or there may be fillers in the container, making it difficult to test the pressure resistance of the container. There are problems in that if contact with the fluid for cleaning is avoided, the test cannot be performed, and the test cannot be performed unless the filling is removed.

Therefore, as shown in the schematic R cross-sectional view of the nozzle part in FIG. 3, an annular seven flange 3 is attached to the same surface of the nozzle 20 by welding, and a disk-shaped medium M4 is welded to the upper surface of the flange 3.
After the nozzle 2 is airtightly partitioned from the main body of the pressure vessel 1, the upper opening of the nozzle 2 is covered with a top lid 5, water is injected into the nozzle 2 through the top lid 5, the inside of the nozzle 2 is pressurized by the water, and the nozzle 2 is closed. An apparatus is known that performs a pressure resistance test to determine the quality of a welded joint 2a.

According to the above-mentioned apparatus, it is not necessary to apply fluid pressure to the entire pressure vessel, but the flange 3 and the disc-shaped inner cover 4 are attached to the nozzle 2 by welding, and after the test is completed, the flange 3 and the inner cover 4 are welded. A step to remove the lid 4 is required,
The work becomes extremely complicated, and in some cases, nozzle 2
The flange 3 and inner lid 4 may not be able to be attached inside.

[Purpose of the invention]

Therefore, an object of the present invention is to easily and easily perform a pressure test of a part of a container, such as the nozzle part of a pressure container, without applying fluid pressure to the entire container. An object of the present invention is to provide a pressure resistance test device for pressure vessels that can perform pressure tests.

[Summary of the Invention] The present invention provides an upper lid that airtightly covers the opening of a container to be subjected to a pressure resistance test, and a lid that is screwed into a screw hole provided in the upper lid and suspended into the container through the screw hole. , a shaft rod having an inner lid attached to the lower end thereof for airtightly partitioning the inside of the container, and a telescopic container supported by the shaft rod and loaded in a space surrounded by the upper lid and the inner lid. a liquid supply pipe connected to the bag through the top lid and configured to supply liquid into the bag;
The present invention is characterized in that a space surrounded by the upper lid and the inner lid is pressurized via the bag by supplying liquid into the bag through the liquid supply pipe.

[Structure of the invention]

Next, the apparatus of the present invention will be explained with reference to the drawings.

FIG. 1 is a schematic longitudinal sectional view showing one embodiment of the device of the present invention. As shown in the drawing, in order to perform a pressure test to check the quality of the welded joint 2a applied to the nozzle 2 of the pressure vessel 1, the opening of the nozzle 2 is connected to a flange 6 formed at the upper part of the nozzle through a packing 7 and a port 8. It is airtightly covered by a top cover 5 attached to the top cover 5.

A screw hole 9 is provided in the center of the upper lid 5, and a shaft rod 10, which is screwed into the screw hole 9, passes through the screw hole 9 and hangs down inside the nozzle 2 along its axis. A disk-shaped inner cover 12 is attached to the lower end of the shaft 1°, and is in sliding contact with the inner circumferential surface K of the nozzle 2 via a packing 11. An airtight space 13 is formed therein.

Inside the space 13, a stretchable bag 14 is placed around the shaft rod 10.
supported and loaded. A bag body 14 is attached to the upper lid 5.
A liquid supply pipe 15 whose lower end is in the shape of a gnome and which penetrates the upper lid 5 is attached with a nut 16 for supplying 1# of liquid into the bag body 14 .

During the test, pressurized liquid is supplied into the bag body 14 through the liquid supply pipe 15. As a result, the upper cover 5 of the nozzle 2
The space 13 surrounded by the inner lid 12 is pressurized via the bag body 14, and thus the quality of the welded joint 2a is tested.

〔Effect of the invention〕

Since the present invention is configured as described above, it is not necessary to apply fluid pressure to the entire pressure vessel 1 in order to inspect the nozzle 2, and in order to inspect only the nozzle 2 portion, it is not necessary to apply fluid pressure to the entire pressure vessel 1. There is no need for processing such as welding the inner lid to the
It has many excellent advantages, such as being able to easily perform a pressure test, and also being able to apply liquid pressure evenly because it is pressurized through the bag.

[Brief explanation of drawings]

Fig. 1 is a schematic vertical sectional view showing one embodiment of the device of the present invention, Fig. 2 is a schematic front view showing a pressure vessel, and Fig. 3 is a schematic diagram showing an example of a conventional test device for a nozzle portion. FIG. In the drawing. 1... Pressure vessel, 2... Nozzle, 3...
Flange, 4...Inner lid, 5...Upper lid,
6・°・Flange, M, 11...Packskin,
8...Bolt, 9...Screw hole, 10.
...Axis rod, 12...Inner lid, 13...Space, 14...Bag body, 15...Liquid supply pipe, 1
6...Natsuto.

Claims (1)

[Claims] A top lid that airtightly covers the opening of a container to be subjected to a pressure test; an elastic bag supported by the shaft and loaded into a space surrounded by the upper lid and the inner lid; a liquid supply pipe connected to the bag body through the upper lid for supplying liquid into the bag body, and by supplying liquid into the bag body through the liquid supply pipe, the bag A pressure test device for a container, characterized in that a space surrounded by the upper lid and the inner lid is pressurized through the body of the container.