JPH045841Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a nozzle device. This invention relates to a plugging nozzle device.

[Background of the idea]

For example, a boiler constructed by a combination of closed containers such as a boiler tube and a header is chemically cleaned when scale is deposited during the construction of the boiler or after a certain period of time after the boiler is operated.

This chemical cleaning method usually involves cleaning with an inorganic acid such as hydrochloric acid or sulfuric acid, but cleaning with an organic acid such as citric acid or hydroxyacetic acid may also be used in consideration of corrosion progression during cleaning.

On the other hand, repair work is carried out on these sealed containers in the event of a boiler accident, and inspection holes are installed to inspect and repair the inside of the sealed containers during repair work. Working holes such as holes for repair and repair are drilled in the closed container itself.

However, it is not desirable to drill a working hole in the body of the sealed container every time a regular inspection or an accident occurs, and it is necessary to seal this working hole by welding after inspection and repair. Another disadvantage is that foreign matter may enter the closed container during cutting.

[Purpose of invention]

The present invention is an attempt to eliminate such conventional drawbacks, and its purpose is to easily make a working hole in a closed container, and to make it easy to cut.
The object of the present invention is to provide a nozzle device that can prevent foreign matter from falling into a closed container during welding.

[Summary of the invention] In order to achieve the above-mentioned object, the present invention provides a nozzle device in which a working hole is bored at a predetermined position in a sealed container and the work inside the sealed container is performed through the working hole. A cylindrical body is provided directly above the working hole so as to surround the working hole, a lid body for collecting foreign matter is removably attached to the hollow part of the cylindrical body, and a lid body above the lid body of the cylindrical body is removably attached. It is characterized in that a virtual cutting/welding position is provided at the position.

[Example of idea]

Embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a longitudinal sectional view of a nozzle device according to an embodiment of the present invention, FIGS. 2 and 4 are longitudinal sectional views showing the nozzle device of FIG. 1 during cutting, during work, and after repair welding, FIG. 5 is a longitudinal sectional view showing another embodiment.

In Figures 1 to 5, 1 is the boiler tube.
A closed container such as a header or a header, 2 is a working hole drilled in the sealed container 1, 3 is a container that covers the outer periphery of the working hole 2, 4 is a lid provided in the container 3 to prevent foreign objects from falling; 5 is a cutting line of the container 3, 6 and 7 are the cylindrical body and the cap divided by the cutting line 5, 8 is a protrusion provided on the inner surface of the container 3, 9 is a handle of the lid 4, and 10 is the cylindrical body 6 This is the repair welded part of cap 7.

In the present invention, as shown in FIG.
A nozzle device with a lid body 4 is provided in the closed container 1,
Each time the sealed container 1 is inspected or repaired, the sealed container 1 itself is not damaged by cutting or welding, and at the time of inspection or repair, the container 3 of the nozzle device is cut and repair welded to perform inspection or repair work. This is how it was done.

Hereinafter, the manner in which inspection work and repair work can be performed will be explained using FIGS. 1 to 4.

First, when inspecting or repairing the inside of the airtight container 1, first cut the container 3 shown in FIG.
As shown in FIGS. 3 and 3, the container 3 is divided into two parts, a cylindrical body 6 and a cap 7.

When cutting the container 3, the lid 4 prevents foreign matter such as cutting chips from falling into the container 1 through the working hole 2.

Then, as shown in FIG. 2, lift the cut cap 7 from above the cylindrical body 6. Then, as shown in FIG. Take it out.

By removing the lid 4 from inside the cylindrical body 6 using the handle 9 in this manner, the working hole 2 is communicated with the outside and work such as inspection and repair can be performed.

When the work inside the airtight container 1 is completed, the lid 4 is first inserted into the cylindrical body 6 as shown in FIG. and then attach the cap 7 to the cylindrical body 6.
cover.

Thereafter, the cylindrical body 6 and the cap 7 are joined together by a repair weld 10 as shown in FIG. 4, and the original nozzle device is restored.

Note that foreign matter such as slag generated during the welding work of the repair welding section 10 is collected on the lid 4 to prevent it from falling into the closed container 1.

In this way, the nozzle device of the present invention cuts along the cutting line 5 each time the sealed container 1 is inspected or repaired.
After the repair, the repaired welded part 1 is removed as shown in Figure 4.
The work hole 2 can be easily made without damaging the sealed container 1 itself by cutting or repair welding, and by repeating this cutting work and welding work. The working hole 2 can be made any number of times.

In addition, even if the nozzle device is cut or welded, the lid body 4 collects foreign matter such as cutting chips and slag during welding without falling into the sealed container 1, making it easy to clean. It also saves time and effort.

FIG. 6 shows another embodiment and corresponds to FIG. 4.

In FIG. 5, 11 is the pocket of the lid body 4, 12
are the threaded portions of the lid body 4 and the handle 9.

The difference from the one in FIG. 4 is that the lid 4 has a pocket 11 for collecting foreign matter, and the handle 9 has a threaded part 12.
The point is that

By providing the pocket 11 in the lid body 4 in this way, foreign matter generated during the cutting work of the container 3 and the welding work of the repair welding part 10 between the cylindrical body 6 and the cap 7 can be more completely collected, and 4 and the handle 9 through the threaded portion 12, the cylindrical body 6
Even if the length of the container 3 becomes shorter by repeatedly performing the cutting and welding operations of the cap 7, the length can be adjusted using the threaded portion 12.

[Effect of idea]

As described above, the present invention provides a cylindrical body directly above the working hole so as to surround the working hole, and a lid for collecting foreign matter is removably attached to the hollow part of the cylindrical body. Cut it at a position above the lid of the cylindrical body.
It is characterized in that a virtual welding position is provided.

Therefore, a working hole can be easily formed without damaging the closed container when inspecting or repairing the closed container.

Further, foreign matter generated when opening or closing the working hole is reliably collected on the lid without falling into the closed container. Since the lid body is removably attached inside the cylindrical body, the chips generated when cutting the cylindrical body at the virtual cutting/welding position and collected on the lid body are removed from the lid body. removed from the tube. Furthermore, foreign matter such as slag that is generated when closing the working hole by welding the virtual cutting/welding position and collected on the lid body,
The next time the cylindrical body is cut and the lid is removed, it will be removed together with the chips. Therefore, foreign matter generated during cutting and welding of the cylindrical body can be reliably discharged from the closed container without falling into the closed container.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view of a nozzle device according to the present invention;
2 to 4 are longitudinal sectional views showing the nozzle device in FIG. 1 during cutting, during work, and after repair welding, and FIG. 5 is a longitudinal sectional view of the nozzle device according to another embodiment. It is. 1... Airtight container, 2... Working hole, 3... Container, 4... Lid body.

Claims (1)

[Claims for Utility Model Registration] A nozzle device in which a working hole is bored at a predetermined position in a sealed container and the work inside the sealed container is performed through the working hole, the working hole being provided directly above the working hole. A cylindrical body is provided to surround the cylindrical body, a lid for collecting foreign matter is removably attached to the hollow part of the cylindrical body, and a virtual cutting/welding position is set above the lid of the cylindrical body. A nozzle device comprising: