JPS6223501Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is suitable for use in, for example, a fire extinguishing system that introduces a constant pressure gas into a container or tank containing a dry powder extinguishing agent and releases the dry powder. This invention relates to automatic pressure regulating valves.

Next, one embodiment of the present invention will be described with reference to the drawings, but it goes without saying that the present invention is not limited to this embodiment.

This drawing shows a schematic longitudinal section of the automatic pressure control valve of the present invention.

That is, a pressure source (not shown) such as a nitrogen gas cylinder is connected to the valve body 1, and this pressure gas is introduced from its inlet port 3 as shown by the arrow, and is discharged from its outlet port 4 as shown by the arrow. derived. This outlet 4 is connected to a tank 20 containing a powder extinguishing agent. The valve body 1 is provided with a valve body 5 and a valve rod connected thereto, and as described later, the valve rod 6 and the valve body 5 are moved up and down by the operation of the valve control section 2. Therefore, it is always maintained in the open position as shown in the figure. Although the valve body is exemplified as the type shown in the drawings, it may be of any type as long as it does not go against the gist of the present invention.

The valve control section 2 includes an idler valve 7 screwed onto the valve rod 6, an idler valve rod 8 connected thereto, an inner lid 10 which is always kept closed by a spring 9, and a valve control section. 2, a pressure vent hole 12 provided in the vicinity of the inner lid 10 of the valve control pressure adjustment cap 11, and pressure openings at the top and bottom of the floating valve 7, respectively. It consists of gas intakes 13 and 14 and a main intake 15 branching off from the respective pressure gas intakes 13 and 14. An appropriate number of notches (not shown) are formed at the lower part of the bent portion of the inner lid 10. This notch is not necessarily limited to this, but may be any cutout that can be placed at the rear so that the pressure above the idler valve 7 can be released.

A stopper 16 is screwed onto the upper part of the valve body 1 and extends to the upper end of the floating valve rod 8. A spring 17 that normally holds the floating valve 7 is installed inside the stopper.

Further, as described above, reference numeral 18 is a spring retainer provided at the upper end of the valve control unit pressure adjustment cap, and the inner cover 10 is always urged by the spring 9. 19 is a bottom metal fitting that closes the bottom of the valve body 1, and 20 is a tank in which powder extinguishing agent is stored, and a hose with a nozzle for discharging the extinguishing agent is omitted in the figure. installed.
Further, 21 is a signal that transmits the pressure of this tank 20 to the valve control section.

Since the present invention is constructed as described above, it operates as described below.

That is, when pressure gas from a pressure source such as a nitrogen gas cylinder is released, it is introduced into the inlet 3 of the valve body 1, led out from the outlet 4, and introduced into the tank 20 via piping. When the pressure in the tank 20 rises to a predetermined pressure, the signal 21 is activated, and the main port 15 of the valve control section 2 opens and the pressure gas from the tank is transferred to the upper and lower pressure gas intake ports 13 and 14 of the floating valve 7.
into the valve control section. In this state, the floating valve 7 does not operate. When the pressure above the floating valve 7 increases together with the pressure below it, the inner lid 10 moves upward away from the stopper 16 against its spring 9. Since there are a suitable number of notches below the bent portion of the inner lid 10, the pressure gas is released from the notches and is discharged to the outside air from the pressure vent port 12. The pressure escaping from the notch in the inner cover 10 prevents the inner cover 10 from moving further away from the stopper 16, and at that point the inner cover 10 stops rising.

When the pressure gas in the upper part of the idle valve 7 escapes in this way, the idle valve 7 rises because the pressure in the lower part of the idle valve 7 has become high. When the floating valve 7 rises, the valve rod 6 screwed thereon and the valve element 5 screwed thereon rise, and the valve body 1 is closed. As a result, the inlet 3 and the outlet 4 are cut off, pressure gas is no longer supplied to the tank, and the pressure in the tank begins to drop. As a result, the floating valve 7 is lowered, the floating valve rod 8, which had been protruding until then, is also lowered, and the inner lid 10 is accordingly returned to its original position. When the floating valve 7 is lowered in this manner, the valve body 5 is lowered accordingly, and the valve is opened, so that the pressure gas from the pressure source is supplied to the tank 20 again. In this way, the pressure in the tank is always kept constant. It is appropriate to release the extinguishing agent from the tank at this point. In conventional pressure regulators of this type, the flow rate was limited because the pressure was reduced to the primary pressure and the pressure gas was allowed to flow. On the other hand, the automatic pressure control valve of the present invention has the feature that a large flow rate of pressure gas can be flowed with a compact valve because the pressure gas flows without reducing the pressure until the tank reaches a predetermined pressure.

[Brief explanation of the drawing]

The drawing is a schematic vertical cross-sectional view showing one example of the automatic pressure control valve of the present invention. 1... Valve body, 2... Valve control section, 5... Valve body,
7...Idle valve, 10...Inner cover, 11...Valve control unit pressure adjustment cap, 12...Pressure vent hole, 13,
14...Pressure gas intake port.

Claims (1)

[Scope of utility model registration request] A valve body 1 and a valve control section 2 integrated with the valve body 1
The valve body 1 is provided with an inlet 3 that connects to a cylinder, an outlet 4 that connects to a powder medicine storage tank 20, and a valve body 5 that opens and closes a passage between these two ports. A floating valve 7 is provided, and the floating valve 7 and the valve body 5 are connected by a valve rod 6, and the valve control section 2 has pressure gas intake ports 13 located above and below the floating valve 7. , 14 are provided, and both intake ports 1
3 and 14 are connected to the powder medicine storage tank 20, and the valve control unit 2 is provided with a port that communicates with the pressure gas intake port 13 and releases this pressure gas. Inner lid 10 to close
The inner cover 10 is linked to open when the floating valve 7 is in the raised position, and a pressure adjustment cap 11 is provided between the inner cover 10 and the spring 9. Automatic pressure regulating valve with a through hole.