JPH0774752B2 - Rotating light transmission window - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light transmission window for externally inspecting the inside of fluid containers and pipes such as boilers, water tanks, chemical reaction towers and fuel gas tanks, and in particular, the transmission window structure is damaged. In some cases, the present invention relates to a rotating light transmitting window capable of immediately blocking fluid leakage and preventing a large-scale fluid projection accident.

[0002]

2. Description of the Related Art As a peep window of this type of pressure fluid container, for example, Japanese Patent Laid-Open No. 1-15 previously proposed by the present applicant has been proposed.
Some of them are described in Japanese Patent Publication No. 0819. This conventional technology
A first inclined surface directed toward the center is formed at one end of the inner peripheral surface of the metal annular body, and the angle of intersection between the first inclined surface and the end surface of the annular body is an acute angle of 45 degrees inside and outside, and The inner peripheral surface of the annular body, which is connected to the first inclined surface, is gently inwardly inclined to form a second inclined surface, and the inner peripheral surface of the annular body has a glass melt having a peelable thickness. An anti-adhesion film is formed, and glass softened at high temperature with the glass anti-fusion film interposed in the torus is fitted so that the end surface of the glass is substantially flush with the end surface of the torus. A glass structure for a viewing window of a pressure fluid container, characterized in that a glass body is formed.

[0003]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention In the above-mentioned conventional technique, the glass and the metal torus are completely press-fitted to each other, and moreover, the glass fusion prevention which is generated on the inner peripheral surface 2 of the metal torus 1 is prevented. Due to the sliding action of the coating, there is very little chance of temperature deformation of the glass body or cracking or breakage of the glass body due to external force during installation and installation, thus significantly reducing production costs and operating costs of the equipment used. Has the advantage of being reduced.

However, in this conventional example, although the damage and the state of the peep glass can be visually recognized, the outflow of the fluid from the damaged portion cannot be quickly blocked, and the damage progresses even if the damage is slight. There is a problem in that there is a risk of leading to a large-scale fluid ejection accident because it cannot be prevented.

In order to eliminate the above-mentioned problems, the present invention operates a ball valve that press fits the glass body to shut off the fluid passage when the glass body for light transmission starts to be damaged. The purpose is to immediately prevent the outflow of fluid from the broken glass body.

[0006]

The above object of the present invention can be achieved by sealing a fluid passage of a movable ball in a ball valve provided in communication with a fluid container with a hard transparent body.

[0007]

[Function] Through the hard transparent body press-fitted into the fluid passage of the movable ball in the ball valve provided in communication with the hole such as the side wall of the fluid container, the state or liquid level of the liquid or gas in the fluid container is seen through. Alternatively, by irradiating a light beam through the transparent body into the fluid container, the inside of the container having a deep bottom can be inspected in detail from another window member or the hole of the container ceiling.

In particular, according to the present invention, when the transparent body starts to be damaged, a ball valve in which a transparent body such as a glass body is press-fitted is operated to seal the fluid passages so that the glass body can be protected from the damaged portion. The fluid outflow can be immediately blocked, and the progress of damage to the transparent body can be stopped.

[0009]

EXAMPLES Examples will be described with reference to the drawings. First, as shown in FIG. 1 and FIG. 2, the basic structure of the present invention is to use a well-known shrink fitting means to attach a hard transparent body 4 such as glass or fine ceramics to a fluid passage 3 of a movable ball 2 in a well-known ball valve 1. It is tightly fitted with a press fitting.

In each of the drawings, the reference numeral 5 indicates a rotary shaft pivotally supported on the upper part of the valve, and this shaft is the lower projecting piece 5 thereof.
a is engaged with the upper groove 2a of the movable ball 2 and is pivotally supported together with the handle 6 by the screw n, washer w, etc. on the ball valve 1, and the rotation of the handle 6 causes the movable ball 2 to move.
Rotate 90 ° in the horizontal direction like
It is configured such that the space between b can be closed.

In each of the above figures, the reference numeral 7 indicates a pair of valve seats which are closely attached to the movable ball 2 and sandwiched between them.
Reference numeral 8 is a female screw portion 1n of the fluid passage 1a of the ball valve 1.
It is a male threaded ring for pressing the valve seat that is screwed into
Insert a hexagonal wrench into the square wrench hole 8a and tighten.

The present invention has the basic structure as described above,
To use this by attaching it to a fluid container such as a boiler or water tank, for example, as shown in Fig. 4, a flat ring for attachment welded to a peripheral portion of a see-through hole 9a such as a side wall 9 of the fluid container.
A female screw portion 1n formed by cutting a male screw ring 9c protruding from the screw 9b on the inner periphery of the fluid passage 1b of the ball valve 1
It is used by screwing it tightly through the packing P.

In this use, the ball valve
The fluid passage 3 of the movable ball 2 in 1 is replaced by the hard transparent body 4
As shown in Fig. 4, since it was sealed with a hard transparent body 4 that was press-fitted into the fluid passage 3 of the movable ball 2 of the ball valve 1 provided in communication with the hole 9a of the side wall 9 of the fluid container, as shown in FIG. To see through the liquid or gas state or liquid surface, and to inspect the inside of the deep container from other window members or holes in the container ceiling by irradiating the inside of the fluid container with light rays through the transparent body. You can

In particular, in the present invention, when the transparent body 4 begins to be damaged, a ball valve having a transparent body such as a glass body press-fitted is operated to seal the space between the fluid passages 1a and 1b as shown in FIG. By doing so, it is possible to immediately block the outflow of the fluid from the damaged portion of the glass body, and it is possible to stop the progress of damage to the transparent body.

[0015]

Since the present invention is constructed as described above, it has the following effects. A simple and inexpensive structure in which a hard transparent body 4 such as glass is press-fitted and fixed in the fluid passage 3 of the movable ball 2 in the well-known ball valve 1 provided in communication with the fluid container, and always or only when desired. By operating the handle, the state of the liquid or gas in the fluid container, the liquid level, etc. can be seen through the transparent body 4, and the inside of the fluid container can be irradiated with a light beam through the transparent body so that other window members or container ceiling The first effect is that the inside of the deep container can be inspected in detail from the hole.

In particular, according to the present invention, when the transparent body begins to be damaged, the glass body is closed by pressing the ball valve in which the transparent body such as the glass body is press-fitted to seal between the fluid passages 1a and 1b. The second effect is that the fluid outflow from the damaged portion can be immediately blocked, the progress of damage to the transparent body can be stopped, and a large-scale fluid ejection accident can be reliably prevented.

[Brief description of drawings]

FIG. 1 is a perspective view of a notch of a main part showing an embodiment of the present invention.

FIG. 2 is a vertical cross-sectional side view of essential parts showing an embodiment of the present invention.

FIG. 3 is a vertical sectional side view showing a state different from that shown in FIG.

FIG. 4 is a vertical sectional side view showing an example of use of the one shown in FIG.

[Explanation of symbols] 1 Ball valve 2 Movable ball 3 Fluid passage for movable ball 4 Hard transparent body

Claims (1)

[Claims] 1. A ball valve provided in communication with a fluid container
The fluid passage 3 of the movable ball 2 in 1 is replaced by the hard transparent body 4
A rotating light transmission window that is sealed with.