JPH0226516Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a closed type sprinkler head having the function of a running water alarm device, which is particularly used in residential sprinkler fire extinguishing equipment.

Sprinkler fire extinguishing equipment has traditionally been installed mainly in buildings, factories, etc., but in recent years the importance of disaster prevention has been reconsidered, and there is a growing demand for their installation in general homes.

However, when this sprinkler fire extinguishing equipment is installed for residential use, a closed type sprinkler head is used as in buildings, factories, etc., and is connected to piping that is constantly filled with pressurized water. , buildings, factories, etc. cannot secure dedicated water for fire extinguishing, so they must share the water supply (hereinafter simply referred to as water supply) that is provided for daily life. Therefore, if the piping for such sprinkler fire extinguishing equipment is branched off from the water supply piping and installed for exclusive use, the water in the branched piping will remain for a long time and become dead water, which will then flow back into drinking faucets, etc. To prevent dead water from forming, be sure to install a faucet that can be used at all times at the end of the pipe to which the sprinkler head is connected.

In this way, residential sprinkler fire extinguishing equipment is
Since the water in the pipes circulates even when the sprinkler head is not operating, a running water alarm device is installed commonly at the base of the pipes to which each sprinkler head is connected, as in the case of buildings, factories, etc. It is not possible to do this, and each sprinkler head must be installed separately, which is uneconomical. This is an issue that should be given particular importance, especially considering that the installation target is a general residence.

In consideration of the above points, the present invention improves the conventional closed type sprinkler head and adds the function of a running water alarm system to itself, thereby eliminating the need to install a running water alarm system for each sprinkler head and preventing sprinkler extinguishing. This allows the equipment to be installed economically in ordinary homes. That is, an ejector is constructed between the valve of the closed sprinkler head and the pyrolysis mechanism, and when the valve is opened and water is released, air is sucked in by the negative pressure generated in the ejector. Although the blower is designed to sound, this requires a transmission mechanism to connect the valve and the thermal decomposition mechanism. Therefore, the structure becomes complicated, and if dirt or the like enters the ejector, it may gradually accumulate and impair its function. Therefore, in the present invention, by further utilizing the valve stopper and extending it downward to pass through the ejector, the valve and the pyrolysis mechanism can be directly connected in the same manner as in the past. This eliminates the need for a mechanism and also functions as a cover for the ejector, thereby making it possible to easily add the function of a running water alarm device to the closed sprinkler head itself.

An embodiment of the closed type sprinkler head according to the present invention will be described below with reference to the drawings. Reference numeral 1 denotes a main body, and a plug 5 is attached to a valve seat 4 formed on the periphery of a lower end opening 3 of a conduit 2 passing through the main body. A valve 6 is formed by contacting from below, and a discharge port 8 having a larger diameter than the opening 3 is opened at the bottom of the opening 3 with a decompression chamber 7 in between, and one side of the decompression chamber 7 is opened. An ejector 10 is configured with an intake port 9 opened on the side. The intake port 9 is provided with a blower 11 which is emitted by air circulation, and the stopper 5 is a deflector 1 supported by a frame 12 extending downward from the main body 1 and which diffuses released water.
By tightening the adjustment screw 14 integral with the valve 3, the valve 6 is pressed upward via a thermal decomposition mechanism 18 consisting of levers 15, 16 and a fusible link 17, thereby closing the valve 6. Note that the plug body 5 extends downward and passes through the discharge port 8 of the ejector 10,
Its diameter is selected to be approximately the same as the diameter of the discharge port 8 to the extent that there is no problem with the stopper 5 being pushed by the pressure water in the pipe line 2 and falling when the pyrolysis mechanism 18 is activated. , dust and the like are prevented from entering into the decompression chamber 7 of the ejector 10.

The present invention is constructed as described above, and the pipe line 2 is constantly connected to the water pipe (not shown).
It is filled with pressurized water. Then, when the temperature rises due to a fire and the fusible link 17 dissociates, the thermal decomposition mechanism 18 is decomposed and scattered, and the plug body 5
is pushed by the pressure water in the pipe line 2 and falls, opening the valve 6. Then, the pressurized water in the pipe line 2 passes from the opening 3 through the vacuum chamber 7 of the ejector 10 and is released from the outlet 8 and diffused by the deflector 13, but at this time, negative pressure is created in the vacuum chamber 7. This occurs, air is sucked through the intake port 9, and the blower 11 is sounded to notify the operation of the sprinkler head.

As described above, the closed type sprinkler head according to the present invention comprises an ejector between the valve and the pyrolysis mechanism, and the blower is made to sound by the air sucked in by the negative pressure generated in the ejector. The plug, which together with the valve seat constitutes the valve, is extended downward to pass through the discharge port of the ejector, and the diameter of the plug is such that when the pyrolysis mechanism is activated, the plug has a diameter so that there is no gap between the plug and the discharge port. The diameter is selected to approximate the diameter of the above-mentioned outlet so that there is no problem with the water being pushed down by the pressure water in the pipe, so a transmission mechanism is provided to connect the valve and the pyrolysis mechanism. Since it is not necessary, the function of a running water alarm device can be easily integrated into the sprinkler head, and since the discharge port of the ejector is completely blocked by the above-mentioned plug, there is no possibility that dirt will enter the ejector and it will not function properly. There is no risk of damage. Therefore, by using this sprinkler head, there is no need to install a running water alarm device or the like for each sprinkler head, and it is possible to obtain an economical closed sprinkler head with a simple structure that is particularly suitable for residential sprinkler fire extinguishing equipment. be.

[Brief explanation of the drawing]

The drawing is a longitudinal sectional view showing an embodiment of the present invention. 2... Pipeline, 3... Opening, 4... Valve seat, 5...
... Plug body, 6 ... Valve, 7 ... Decompression chamber, 8 ... Discharge port, 9 ... Intake port, 10 ... Ejector, 11 ...
Blow body, 18... thermal decomposition mechanism.

Claims (1)

[Scope of Claim for Utility Model Registration] A valve seat 4 formed at the periphery of the opening 3 at the lower end of a conduit 2 connected to a water pipe or the like.
and a stopper 5 that abuts the valve seat 4 from below, and the stopper 5 is constantly pressed against the valve seat 4 via a thermal decomposition mechanism 18 to close the valve 6. , a closed type sprinkler in which when the thermal decomposition mechanism 18 is activated due to a rise in temperature, the pressure is released, the plug body 5 is pushed by the pressure water in the pipe line 2 and falls, and the valve 6 is opened. In the head, a decompression chamber 7 is provided below the opening 3 which is closed by the stopper 5, and the decompression chamber 7 has a diameter larger than the opening 3 at a position opposite to the opening 3. A large discharge port 8 is provided, and an intake port 9 is provided on one side, and a blower 11 is provided in the intake port 9, and the plug body 5 passes through the discharge port 8 when the opening 3 is closed. and its diameter is the same as that of the above thermal decomposition mechanism 1.
8. A closed type sprinkler head equipped with a function of a running water alarm device, characterized in that the diameter of the discharge port 8 is selected to be approximate to the diameter of the discharge port 8 to such an extent that there is no problem in falling when the sprinkler head is activated.