JPS5845725Y2 - relief valve - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a relief valve for a starting gas pipe system used to open and close a discharge valve of a fire extinguishing gas container in fire extinguishing equipment using fire extinguishing gas.

For fire extinguishing equipment that uses fire extinguishing gas such as halon,
Opening and closing of the gas release valve from a fire extinguishing gas storage container (such as a cylinder) to the fire extinguisher piping system by the action of a high-pressure gas such as carbon dioxide (hereinafter referred to as starting gas) stored in a separate storage source. There is something to do.

That is, when the fire extinguishing system is to be activated, the starting gas release valve is automatically or manually opened momentarily (or for a relatively short period of time) to open the release valve of the fire extinguishing gas storage container.

Although the starting gas release valve is then automatically closed, high pressure gas remains in the starting gas line system.

(Once the extinguishing gas release valve is opened, it will not close.

) Until now, to release this, a manual relief valve has been inserted into the startup gas piping system to release the residual gas.

However, if you forget to close this manual relief valve, the gas will escape and the extinguishing gas will not be released even when the startup gas system is activated next time.

The present invention is intended to eliminate the above-mentioned problem, and is a piston cylinder consisting of one gas passage and two parts with different diameters that branch off and connect from the passage, with the gas passage side facing having a small diameter, the position where the small diameter part connects to the gas passage forms a valve seat of the piston valve described below, and the small diameter part has a relief hole; the inner surface of the large diameter part of the cylinder A piston valve that slides in close contact and extends through the small diameter portion and whose tip fits into the valve seat, forming a valve whose pressure receiving area is smaller than the cross-sectional area of the entering diameter portion; and the large diameter of the cylinder. To provide a relief valve consisting of a lid body for opening and closing a portion and having a gas inlet; and a spring housed in a large diameter portion of the cylinder and for directing the piston valve to the gas passage side.

Next, the present invention will be explained in detail with reference to the drawings.

As shown in FIG. 1, a body 1 of this valve is formed with a gas passage 2 and a piston cylinder 3 branching off in a direction perpendicular to the gas passage 2.

This piston cylinder 3 is formed with a small diameter portion 4 on the side of the gas passage 2 and a large diameter portion 5 on the opposite side, and a portion where the small diameter portion 4 connects to the gas passage 2 is provided with a piston valve 12 (described later). A valve seat 7 is formed, and a relief hole 6 that is open to the atmosphere is provided in the middle of the small diameter portion 4.
The large diameter section 5 is opened and closed by a cap 9 provided with a gas inlet 8.

A piston valve 12 consisting of a piston 10 and a stem 11 is housed in the piston cylinder 3, and the piston 10 is tightly fitted and slidable on the inner surface of the large diameter portion 5. is pressed so that it comes into contact with the end face of the

On the other hand, the stem 11 slidably passes through the small diameter portion 4, and a valve 14 having a larger diameter than the piston 10 facing the valve seat 7 is formed at the tip thereof. An annular gap 15 is provided between the small diameter portion 4 and the small diameter portion 4 .

By the way, an example of a fire extinguishing equipment using this relief valve will be explained with reference to FIG.

In the figure, A is a fire extinguishing gas storage container (hereinafter specifically referred to as a fire extinguishing gas cylinder) equipped with a fire extinguishing gas discharge valve B, C is an injection head intended for the discharge compartment, and the fire extinguishing gas piping is indicated by a solid line. Connected by E.

On the other hand, F is a starting gas storage container (hereinafter referred to as starting gas cylinder) equipped with a starting gas release valve G, H is this release valve, and J
is a gas pressure starter attached to the fire extinguishing gas release valve B, and the inlet 2A of the gas passage 2 shown in FIG. The outlet 2B is connected to the starting gas pipe by 2 to the extinguishing gas discharge valve B of the extinguishing gas cylinder A via the gas pressure starter J, and the gas inlet 8 is connected to the starting gas pipe to the extinguishing gas pipe E by 3. They are connected along the way.

In this state, the piston valve 12 of the relief valve H is pressed by the spring 13, the piston 10 closes the small diameter part 4 of the piston cylinder 3 from the large diameter part 5 side, and the valve 14 closes the valve seat 7. The gas passage 2 is open to the atmosphere via the annular gap 15 and the relief opening 6.

In the event of a fire, if the startup gas release valve G is opened momentarily (or for a relatively short period of time) and the startup gas flows from the startup gas cylinder F into the gas passage 2 of the relief valve H through the diameter of the startup gas piping, the sudden Pressed by the dynamic pressure, the piston valve 12 moves toward the cap 9 against the tension of the spring 13.

As a result, as shown in FIG. 2, the valve 14 is seated on the valve seat 7, the small diameter portion 4 is closed, and the relief port 6 is also closed.

Therefore, the starting gas flows from the outlet 2B of the gas passage 2 to the starting gas pipe 2 to the gas pressure starter J, and the gas pressure starter J is activated to open the extinguishing gas release valve B.

As a result, the extinguishing gas passes through the extinguishing gas pipe E and is injected from the injection head C.

At the same time, a part of the extinguishing gas passing through the extinguishing gas pipe E passes through the starting gas piping 3, is led from the gas inlet 8 of the cap 9 to the large diameter part 5 of the piston cylinder 3, and is guided to the large diameter part 5 of the piston cylinder 3.
Press 0.

Since the area of this piston 10 is set larger than the area of the valve 14 as described above, the balance of the acting force in the axial direction of the piston valve 12 in FIG. 2 is broken, and the piston valve 12 is as shown in FIG. 1. , it moves to the gas passage 2 side.

Therefore, the valve 14 is removed from the valve seat 7, and the relief port 6 is also communicated with the annular gap 15.

Therefore, the gas passage 2 is opened to the atmosphere through the gap between the valve 14 and the valve seat 7, the annular gap 15 and the relief port 6, and as a result, the high pressure remaining in the starting gas pipes 1 and 2 is removed. The starting gas is released to the atmosphere.

FIG. 4 shows another example of fire extinguishing equipment using this relief valve H.

The difference from FIG. 3 is that the discharge section is divided into a narrow section and a wide section D', and the number of jet heads C suitable for each section is divided into a narrow section and a wide section D'.
and connected it to the fire extinguishing gas cylinder bore hole A3 through a dedicated selection valve and L'.

Note that M is a check valve provided in the starting gas piping between the starting gas cylinders A2 and A3.

Now, if the target is the release compartment, start gas release valve G
When , the starting gas opens the selection valve and is simultaneously stopped by the relief valve M, opening the extinguishing gas discharge valves B of the extinguishing gas cylinders A1 and A2.

Therefore, corresponding to the two jet heads C in the discharge compartment, there are two
The extinguishing gas from the extinguishing gas cylinders A1 and A2 is released.

On the other hand, when the discharge section D' is targeted, when the starting gas release valve G' is opened, the starting gas passes through the check valve M, and the extinguishing gas from the three extinguishing gas cylinders A1 to A3 is released.

As explained in detail above, according to the present invention, a relief port is provided in the gas passage, and the relief port can be opened by a piston valve that responds to the gas pressure from the gas inlet.
Use this relief valve in the starting gas piping system of fire extinguishing equipment,
The piston valve is opened by the extinguishing gas pressure, and the starting gas remaining in the starting gas piping can be automatically released to the atmosphere. As a result, it is possible to completely prevent starting failure caused by forgetting to return to the conventional manual release operation. There are consequences.

[Brief explanation of the drawing]

1 and 2 show a preferred embodiment of the present invention, in which FIG. 1 is a side sectional view when the gas passage is open to the atmosphere;
FIG. 2 is a side sectional view when the atmosphere is shut off, and FIGS. 3 and 4 are explanatory diagrams of fire extinguishing equipment using this embodiment, respectively. 1...Body, 2...Gas passage, 3.
... Piston cylinder, 4 ... Small diameter part, 5 ... Large diameter part, 6 ... Relief port, 7 ... Valve seat, 8...Gas inlet, 1
0... Piston, 11... Stem, 1
2... Piston valve, 13... Spring, 14... Valve, 15... Annular gap.

Claims (1)

[Scope of utility model registration request] one gas passage; a piston cylinder consisting of two parts with different diameters that branch off and connect from the passage, the gas passage side having a small diameter, and the small diameter part connecting to the gas passage; The position forms the valve seat of the piston valve described later,
a piston valve having a relief hole in the small diameter part; a piston valve that slides closely on the inner surface of the large diameter part of the cylinder, extending through the small diameter part and having a tip thereof adapted to the valve seat; A valve having a pressure-receiving area smaller than the cross-sectional area of the inlet diameter part; a lid body for closing the large diameter part of the cylinder and having a gas inlet; A relief valve consisting of a spring that moves the piston valve to the gas passage side.