JPS5816782Y2 - Selection valve for gas extinguishing - Google Patents

Description

[Detailed description of the invention] The present invention relates to an improvement of a selection valve for gas fire extinguishing, more specifically a selection valve for releasing fire extinguishing gas in a gas fire extinguishing compartment. To provide a selection valve for gas fire extinguishing, which prevents destruction or damage of a housing wall due to rising, prevents deformation of a valve body, and ensures smooth vertical movement of the valve body.

The applicant has already developed a selection valve for gas extinguishing, for which a utility model registration application was filed on October 11, 1980.
A cover unit 8 is screwed into the opening 4 opened at the top of the cover unit 8, and a vertically movable valve body 5 is attached to the cover unit 8. I was seated at number 6.

In the selection valve O having this structure, when gas flows directly under the piston 17, the piston 17 rises due to the gas pressure, and at the same time, the valve body 15 also rises via the spindle 16.

At this time, as soon as the valve body 15 separates from the valve seat 6, gas from the inflow side flows into the discharge side, but the gas pressure is significantly lower than the elastic force of the spring 7, so this gas pressure causes the valve body 5 to suddenly move. the upper circumference 10 of the valve head 10 of the valve body 5'
' or place it on the bottom surface 8' of the cover unit 7.

The bottom surface 8' of the integral cover 8 is destroyed or damaged by the placement of the valve body 5, and the upper peripheral edge 10' of the valve head 10 on the placement side is also often broken and deformed.

As a result, fatal defects such as the valve body 5 not being able to move up and down smoothly have been caused.

This invention consists of a completely new configuration developed to eliminate these drawbacks, and its feature is that the valve seat, which is open between the inflow port and the discharge port, is constantly compressed by a spring. In a selection valve for gas fire extinguishing, which has a configuration in which the valve body is seated by force and is raised by the rise of a piston and fluid pressure to open the valve, a communication hole communicating with the housing in which the valve body is installed is connected to the valve body. It is made by drilling into the valve head of the body.

The specific configuration thereof will be explained below according to an embodiment shown in the drawings.

Reference numeral 1 denotes a selection valve body having an inflow port 2, a discharge port 3, and an opening 4 opened in a communication portion between the two; 5, a valve seat 6 of the opening 4 is normally tightly held by the elastic force of a spring 7; It is a valve body energized to be seated, and is attached to a cover unit 8 screwed into an opening 4 formed on the top surface of the selection valve body 1 so as to be movable up and down. The valve head 10 has an upper circumferential edge 10' wider than the valve stem 9 to be locked.

11 is an indicator screwed onto the valve body 5;
It is inserted freely into and out of the hole 12 of the cover unit 8 which is screwed together.

13 is a housing formed between the cover unit 8 and the valve body 5; 14 is a cap screwed into a recess formed in the valve body 1 directly below the opening 4; A piston 17, into which the other end of a spindle 16 inserted into a groove 5' of the valve body 5 is screwed, is mounted inside the piston 17 so as to be reciprocally movable.

18 indicates O'J song.

The selection valve main body 1 having the above structure has already been devised by the applicant, or the present invention has a housing attached to the valve head 10 of the valve body 5 provided in the selection valve main body 1.
3 is characterized by having a communication hole 19 that communicates with the hole 19.

Since the present invention has the above-mentioned configuration, as shown in FIG. Since the upper peripheral edge 10' is formed to be wide, the upper peripheral edge 10' is expanded along with the elastic force of the spring 7.
The gas pressure acts effectively to press the valve body 5 toward the valve seat 6, and the valve seat 6
In contrast, the valve body 5 is tightly seated to reliably prevent gas leakage from the primary side to the discharge side and close the opening 4.

Next, when the selection valve is opened to release gas due to a fire in the fire extinguishing compartment of this selection valve, if the external or internal inflow gas is allowed to flow directly below the piston 17 through the conduit, the piston 17 When the gas is pushed up inside the cylinder by the pressure and moves up, it moves away from the valve seat 6 through the spindle 16 against the elastic force of the valve body 5 or the spring 7 and opens the opening 4. It passes through and flows into the discharge port 3 side.

At that time, the wide valve head 10 of the valve body 5 is pushed up by the gas pressure, or a portion of the gas flows into the housing 13 from the communication hole 19, so that the rapid rise of the valve body 5 causes the gas to flow into the housing 13. As a result, the valve body 5 rises until the upper peripheral edge 10' of the valve head is locked with the bottom surface 8' of the cover unit 8.

Therefore, the rise of the valve body 5 is buffered by the gas pressure within the housing 13, and the rise of the valve body 5 is not as sudden as in the conventional case.
9, the upper circumference 10' of the valve head of the valve body 5 and the bottom surface 8' of the cover unit 8 are engaged with each other in a direct contact state. They are locked together without causing any damage to each other.

In this way, the present invention includes the valve head 10c of the valve body and the housing 1.
By providing a communicating hole 19 in the housing 13, when the valve body 5 is raised by gas pressure, part of the gas flows into the housing 13 through the communicating hole 19. (Thus, the valve body will not rise suddenly, and the upper circumference 10' of the valve head of the valve body and the bottom surface 8 of the cover integrally
It has a special effect of mitigating the impact with ' and preventing the destruction of both.

It should be noted that the shape of the valve body, the shape of the selection valve body, the number and shape of communication holes, etc. are by no means limited to the embodiments.

Further, the formation of the housing is by no means limited to integrally forming the cover.

As mentioned above, in this invention, a communication hole is formed in the valve head of the valve body provided in the selection valve body to communicate with the inside of the housing, so that after the valve body is raised by a piston, etc. The gas pressure on the primary side is about to rise even more rapidly, but due to the drilling of the communication hole, some of the gas flows into the housing through the communication hole, and therefore, the gas pressure flows into the housing. The gas or buffer material prevents the valve body from rising rapidly.

Therefore, the impact between the upper periphery of the valve head of the valve body and the integral bottom surface of the cover is alleviated, and a special effect is achieved in that it can prevent destruction, damage, and deformation of both parts.

As a result, various practical effects have been achieved in which the valve body moves up and down smoothly, and the valve can therefore be opened and closed extremely smoothly and reliably.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of a selection valve according to the present invention. FIG. 2 is a longitudinal cross-sectional view of the valve when it is open. FIG. 3 is a longitudinal sectional view of a conventional selection valve. DESCRIPTION OF SYMBOLS 1... Selection valve body, 4... Opening part, 5... Valve body,
6... Valve seat, 7... Spring, 8... Cover integrated, 8'... Bottom surface, 10... Valve head, 10'... Upper periphery of valve head, 19... ...Communication hole.

Claims (1)

[Scope of utility model registration request] For gas fire extinguishing, the valve seat (usually seated under the elastic force of a spring) is opened between the inflow port and the discharge port. A selection valve for gas fire extinguishing, characterized in that the valve head of the valve element is provided with a communication hole that communicates with the housing in which the valve element is mounted.