JP2005209374A - Pressure switch for discharge signal output of fire-fighting equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pressure switch for discharge signal output capable of obviating the need of a powder filter and of eliminating non-operation by operating a pressure reception part by receiving pressure through a diaphragm. <P>SOLUTION: This pressure switch used for outputting a discharge signal of fire-fighting equipment has the pressure reception part for receiving its discharge pressure, and is so structured as to operate the pressure reception part by receiving pressure through the diaphragm 9. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a pressure switch used to output a fire extinguishing equipment discharge signal.

A conventional pressure switch of this type will be described using the powder fire extinguishing equipment shown in FIG.
In FIG. 3, 1 is a powder extinguisher storage tank, 2 is a primary pipe extending from the powder extinguisher storage tank 1, 3 is a discharge valve provided in the primary pipe 2, and 4 is a plurality of secondary branches branched from the primary pipe 2. Piping 5 is a selection valve provided in the secondary piping 4, and 6 is a pressure switch with a powder filter 7 attached to the secondary piping 4, which senses the pressure during discharge in the secondary piping 4 and outputs a release signal. Release notifications, lighting of emission indicator lights, etc. are performed.

  The problem to be solved is that in this conventional powder fire extinguishing equipment, a large amount of powder flows in the secondary pipe 4 at the time of discharge, so that the powder filter 7 is clogged and the pressure switch 6 does not operate.

  The present invention outputs a discharge signal of a fire extinguishing equipment, and has a pressure receiving portion that receives the discharge pressure, and the pressure receiving portion is operated to receive pressure through a diaphragm.

  In the present invention, since the pressure receiving portion is pressure-receiving operated via the diaphragm, there is an effect that a powder filter is unnecessary and there is no inactivation.

  This was realized by operating the pressure receiving part through the diaphragm.

  FIG. 1 is a facility piping diagram showing one embodiment of the present invention, and FIG. 2 is a vertical side view showing the pressure switch of FIG. 1. In FIG. Description is omitted.

  In the figure, 8 is a switch body attached to the secondary pipe 4, 9 is a diaphragm for receiving the discharge pressure at the pressure receiving port 8 a of the switch body 8, 10 is a diaphragm presser assembled to the switch body 8, and 11 is a diaphragm at the tip. 9, a piston that is inserted through the diaphragm retainer 10 so as to be able to advance and retreat, 12 is a lid attached to the diaphragm retainer 10, 13 is a movable contact 13a at the base end of the piston 11, a fixed contact 13b at the lid 12, and an intervening spring 13c. Although not shown, the switch contact mechanism is configured so that a signal can be output to the outside.

  Now, when the powder fire extinguishing equipment is discharged, when the powder in the secondary pipe 4 enters from the pressure receiving port 8a and pushes the diaphragm 9, the piston 11, that is, the movable contact 13a is pushed against the spring 13c, and the switch contact mechanism 13 is moved. An entry / exit signal is output. Since this switching operation is performed without being affected by the powder in the pressure receiving port 8a when it is isolated by the diaphragm 9, there is no need for a powder filter as in the prior art, and there is no inoperability due to powder.

  When pressure is no longer applied to the diaphragm 9, the movable contact 13a and the piston 11 are automatically restored by the spring 13c and the switch contact mechanism 13 is cut off. Therefore, a holding circuit may be provided if necessary.

  The present invention is not limited to powder fire extinguishing equipment but can be widely used throughout fire extinguishing equipment.

It is an equipment piping figure showing one example of the present invention. It is a vertical side view which shows the pressure switch of FIG. It is equipment piping which shows the conventional powder fire extinguishing equipment.

Explanation of symbols

1: Powder extinguisher storage tank 2: Primary piping 3: Release valve 4: Secondary piping 5: Selection valve 8: Switch body 8a: Pressure receiving port 9: Diaphragm 10: Diaphragm presser 11: Piston 12: Lid 13: Switch contact mechanism 13a: movable contact 13b: fixed contact 13c: spring

Claims (1)

  A discharge signal output signal for a fire extinguishing facility, which outputs a discharge signal for the fire extinguishing facility, has a pressure receiving portion for receiving the discharge pressure, and the pressure receiving portion is operated to receive pressure through a diaphragm. switch.

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