JPS5937513Y2 - Peephole structure of pressure vessel - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a viewing window structure for a pressure vessel.

In general, when glass is used for the viewing window of a high-temperature, high-pressure pressure vessel, under various conditions stipulated by the High Pressure Gas Control Law, for example, under the conditions that it is circular and has a maximum diameter of 150 mm or less,
Temperature and pressure are 200℃, 20kg/cr+
Although it can be used up to G grade, it is very dangerous if the glass should break, so it should not be used at 100℃ and 10K.
Containers containing more than g/cnfG should not be used.

On the other hand, there are cases where it is absolutely necessary to provide a viewing window in such a container, so conventional methods include using a wire mesh to prevent the glass from breaking due to external mechanical impact, or using a viewing window. It has been proposed that a valve be attached to the glass to prevent pressure from being constantly applied to the glass.

However, the former structure does not take into account the possibility that the glass should break, and the latter structure
Since the time when pressure is applied to the glass is limited to only when looking inside the container, the possibility of breakage can be reduced stochastically, and pressurized gas can be introduced between the glass and the bulb while the bulb is closed. There are advantages such as safety if the valve is opened after checking for damage to the glass, but due to the structure where the ball valve and gate valve are installed between the container body wall and the glass, it is difficult to open the valve. The disadvantage is that the distance between them is large and the field of view is narrow.

The present invention aims to solve these problems and provide a viewing window structure with a wide field of view and high safety.

In order to achieve the above object, the present invention reduces the area of the glass that receives the pressure inside the pressure vessel, and forms a tapered peephole in the window forming part so that the field of view is wide, and the diameter of the peephole is small. While the glass is placed on the outer end surface, in order to prevent the glass from being damaged by external mechanical shock, a protective shell and lid are also provided to protect the glass, and in the event that the glass is damaged. However, the lid is equipped with a valve that senses this before the lid is opened and reduces the pressure inside the lid to prevent glass fragments from spewing out along with the contents the moment the lid is opened. .

Hereinafter, the present invention will be described with reference to the accompanying drawings.

The viewing window of the pressure vessel according to the present invention includes a tapered viewing window 8 formed in the window forming part 2 of the pressure vessel trunk wall 1 and having a small diameter on the outside of the trunk wall, and a circular glass window attached to the outer end surface of the viewing window 8. 3, a cylindrical protection shell 4 fixed to the window forming part 2 coaxially with the glass 3 and surrounding the glass 3, and a lid 5 disposed on the free end side of the protection shell 4 so as to be openable and closable. and a ring 6 that is rotatably attached to the protective shell 4 and press-fits the lid 5 to the protective shell 4.
and a drive mechanism 7 for rotating the ring 6.

The window forming portion 2 has a tapered peephole 68 communicating with the outside and the inside of the pressure vessel, and a glass 3 is disposed on the outer end surface of the hole 8 with a gasket 9 interposed therebetween.

This glass 3 is bolted through a retainer ring 10.

A protective shell 4 that prevents the glass 3 from being damaged by mechanical impact from the outside is fitted onto the window forming part 2 at its fixed end flange 11 and bolted to the window forming part 2, and its free end flange 11 A guide groove 13 is formed in 12.

The lid 5 is fixed to an arm 15 that is pivoted to a support plate 14 attached to the protective shell 4, and the opening on the free end side of the protective shell 4 is opened and closed by operating a handle 16.

As shown in FIG. 1, the flange portion 12a above the guide groove 13 of the protective shell 4 and the mirror shaft 17 that forms the flange of the lid 5 form claws 18. Align the claw 19 of the ring 6 between the claw and the ring 6
It will be packaged in

The ring 6 is supported by a plurality of support rollers 20 mounted on the ring, and a rack 21 is attached to the outer periphery of the ring 6, and this rack meshes with a pinion 22.

The pinion 22 is a ring support base 2 attached to the protective shell 4.
The ring 6 is fixed to a shaft 24 attached to the ring 3, and is driven to rotate by operating a ratchet handle 25 attached to the shaft 24, thereby rotating the ring 6.

A valve 26 and a pressure gauge 27 are installed on the lid 5 to check for leaks.
is attached, and a gasket 28 is installed between the lid 5 and the protective shell 4.
is installed.

When using a viewing window with the above structure, usually the claw 1 of the ring 6 is
9 engages with the claws of the lid 5 and the protective shell to press the lid 5 onto the protective shell 4, but when looking into the inside of the container, first open the valve 26 to detect a slight leak inside. After releasing the gas, close this valve again.

In the unlikely event that the glass is damaged, when you open the valve,
Since a large amount of gas will be ejected, breakage of the glass can be detected by this, but after closing the valve, it can be confirmed that there is no breakage of the glass by checking the pressure gauge 27.

After confirming that the glass is not damaged, the ratchet handle 25 is then operated to turn the ring 6 to the position shown in FIG. 1, and the handle 16 is pulled to open the lid 5.

After observing the inside of the container through the viewing window, the lid is closed by performing the operations in the reverse order of opening.

Note that at least one of the claws 18 and 19 has a tapered contact surface, so the ring 6 is rotated to engage the claws 19 with the claws 18 of the lid 5 and the protective case 4. When this is done, the lid 5 is crimped onto the free end surface of the protective shell 4 to seal it.

As is clear from the above explanation, according to the present invention, the distance between the glass and the body wall is short, and a tapered peephole with a small diameter on the outside and a large diameter on the inside is formed, which makes it possible to reduce the distance from the conventional valve. Not only can you get a significantly wider viewing window than using a viewing window,
Since the area on which the pressure inside the pressure vessel is applied to the glass is small, there is less risk of the glass breaking.

In addition, the lid and protective shell prevent the glass from breaking due to mechanical impact, and even if the glass is broken, they can prevent the risk of gas leakage. This can be confirmed with a pressure gauge, which increases the safety of the viewing window, allowing it to be used in fields with higher temperatures and pressures than conventional ones, and provides superior effects.

[Brief explanation of drawings]

Figure 1 is a front view of the viewing window of the pressure vessel according to the present invention;
The figure is a partially sectional side view. DESCRIPTION OF SYMBOLS 1... Pressure vessel trunk wall, 2... Window forming part, 3... Glass, 4... Protective shell, 5...
...Lid, 6...Ring, 7...
Drive mechanism, 8...hole.

Claims (1)

[Scope of utility model registration request] A tapered peephole having a small diameter on the outside of the body wall formed in a window forming portion of a pressure vessel body wall; a circular glass disposed adjacent to the peephole on an outer end surface of the window forming portion; a cylindrical protection shell fixed to the window forming part coaxially with the glass and surrounding the glass, a lid disposed on the free end side of the protection shell so as to be openable and closable, and a lid attached to the lid. and a valve that communicates the space formed between the glass and the outside, a ring that is rotatably mounted on the protective shell and presses the lid to the protective shell, and a drive mechanism that rotates the ring. A viewing window structure for a pressure vessel characterized by: