SU1466980A2 - Marine fire-fighting water system - Google Patents

Abstract

The invention relates to shipbuilding, in particular to ship fire-fighting water systems. The aim of the invention is to increase the efficiency of the system by preventing the ejector from pumping water overboard the vessel when the pump is operated on

Description

one

The invention relates to shipbuilding, in particular to a shipboard fire-fighting system, and is an improvement of the system according to the author. . St. 1260290.

The purpose of the invention is to increase the efficiency by preventing the ejector from pumping water out of the receiving pipe overboard when the pump is operating on the fire line.

The drawing shows schematically the ship’s fire fighting water-water system.

The system contains a receiving pipe 1 with a grill 2 at the inlet and a pipe 3 at the outlet, with 4 with the first shut-off valve 5 and an ejector 6 connected by pipeline 7-10. Pipeline 1 passes through tank 11. It contains windows 12 that connect the cavity A of the vacuum of pipe 1 and cavity B of the retaining tank 13 and are made in the walls 14 of pipe 1. Pipeline 1 has a water presence sensor 15 connected to valve 5 ( whose drive is not shown). The ejector is drained through the intake port 16, the retaining tank 13 is connected by the bypass pipe 17 to the fire main. The pipeline 17 is equipped with a valve 18 with a signaling device 19 of its final position and

electro-hydraulic manipulator 20 with two windings 20.1 and 20.2 electromagnets. The winding 20.2 of the electric socket of the manipulator 20 is electrically connected with the output of the element OR 21 and through the inverter 22 to the first input of the element I 23, the output of which is electrically connected with the winding 20.1 of the electromagnet of the manipulator 20, the second input of the element And 23 is electrically connected the output of the second element OR 24, the input of which is electrically connected to the sensor 25 of the lower water level in the retaining tank 13 and through the second inverter 26 to the signal lamp 27 of the lower water level in the retaining capacity and the other input of the element OR 24 is electrically connected to the contact 28.1 triplex This is a key element 28, the contact 28.2 of which is electrically connected with the input of the element OR 21, the other input of which is electrically connected with the sensor 29 of the average water level in the supporting tank. The sensor 29 is electrically connected to the signal lamp 30. Outputs a and b of the annunciator 19 of the end position of the valve 18 are electrically connected to the signal lamps 31 and 32. The output b of the signaling device 33 of the operation of pump 4 is electrically connected to the signal lamp 34, and the output a pump operation and electrical connection with the signal lamp 35 and the third input of element I.

In addition, a water level sensor 36 is installed in the water supply sensor 15 in the receiving pipe 1, the output of which through the control winding 37. D is electrically connected to the on-off manipulator 37 of the additional check valve 38 installed in the pipe 9 connecting the pump 4 and an ejector 6, equipped with an alarm device 39 of its final position, the outputs a and b of which are electrically connected with the signal lamps 40 and 41.

The system works as follows.

When the water level in the receiving pipe 1 of the sensor 36 of the water level reaches the level, the electrical signal from the sensor goes to the winding 37.1 of the electrohydraulic manipulator 37, and the shut-off valve 38 closes. This stops the suction of air from the pipeline 1, the vacuum in cavity A drops and the water level stops increasing, iTo prevents unnecessary release of water overboard when the pump is running. This ensures that the pump only operates on the fire main and on creating a minimum vacuum in the cavity A of the receiver.

1466980

pipeline 1, which is necessary and sufficient to raise the water column to the water presence sensor 15. After the water level is below the water level limit sensor 36, the signal from the command winding is removed and the manipulator 37 moves the stop valve 38 to the open Q position, thus starting the ejector.

Claims (1)

Invention Formula 5 Ship fire-fighting waters on the system, according to author. No. 1260290, about the fact that, in order to increase the effectiveness of the prevention of water pumping 0 by an ejector from the receiving pipeline overboard of the vessel when the pump is operating on the fire main, it is equipped with a limit level sensor installed in the receiving pipeline 5 and installed on the pipeline, which connects the discharge pipe of the pump to the ejector nozzle inlet, an additional shut-off valve with an end position indicator and a dual positional electro-hydraulic manipulator having a control winding electrically connected to the water level limit sensor.