JPH0714378U - Sprinkler fire extinguisher water flow detector - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a simple water flow detector. [Structure] A structure in which an orifice 2 is provided in a sprinkler pipe 1 and pressure water is guided from this pressure difference portion to a pressure difference switch 4.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a water flow detector for a sprinkler fire extinguisher.

[0002]

[Prior art]

 As a water flow detector of this type, there is the device of the device application 62-165 331 previously proposed by the present inventor. The previously proposed device is a device in which the differential pressure conduit of the differential pressure switch is guided from the front and rear of the check valve.

[0003]

[Problems to be solved by the device]

 In recent years, sprinkler equipment for extinguishing fires has often been installed in apartments and the like. In this device, if a sprinkler head opens due to a fire, it is necessary to notify that by a warning device. For that purpose, a water flow detector is installed in the sprinkler pipe and is connected to an alarm device. Since the water flow detector proposed above is installed in the check valve, its mounting position is limited. In this proposal, we propose a water flow detector that can be installed at any position on the pipe.

[0004]

[Means for Solving the Problems]

 This invention will be described with reference to the drawings of the embodiment (see FIGS. 1 and 2). A differential pressure generating pipe such as an orifice 2 or a Venturi pipe 3 is provided in the middle of the pipe 1, and the differential pressure is generated from the differential pressure portion in the flowing water region. It is a running water detector of the sprinkler fire extinguisher that guides pressurized water to the switch 4 (4a in Fig. 2) and detects running water generated in the pipe 1 during a fire.

[0005]

[Action]

 When a sprinkler head (not shown) provided at the tip of the pipe 1 opens due to the heat of a fire, the water filling the pipe 1 is sent to the head opened by a pump (not shown). A difference in water pressure before and after a differential pressure generator such as an orifice provided in the pipe 1 or a Venturi pipe is generated, and the differential pressure switch 4 (4a) operates to transmit the signal to the alarm device.

[0006]

【Example】

 In either embodiment, 5 and 6 are high pressure side conduits leading to the differential pressure switch 4, and 7 and 8 are low pressure side conduits. The differential pressure switch 4 is connected to an alarm device (not shown).

Actually, when the water flow in the pipe 1 is 30 to 200 liters / minute, the differential pressure switch operates at a differential pressure of 1000 mm (water column). Therefore, from now on, the orifice and the Venturi tube will be required by design.

[0008]

[Effect of device]

 The flowing water detector of the present invention has a simple structure and can be attached to any position of the sprinkler pipe, and can provide a simple and economical device for sprinkler equipment such as an apartment house.

[Brief description of drawings]

FIG. 1 is a side view conceptually showing one embodiment of the device according to the present invention.

FIG. 2 is a side view conceptually showing another embodiment.

Claims (1)

[Scope of utility model registration request] 1. An orifice or a differential pressure generating pipe such as a Venturi pipe is provided in the middle of the pipe, and pressure water is introduced from a differential pressure portion in the flowing water region to a differential pressure switch to detect running water in the pipe during a fire. Sprinkler fire extinguisher water flow detector.