RU6550U1 - WATER DRAINAGE INSTALLATION OF A SUBMARINE - Google Patents

Abstract

A submarine drainage installation containing a high-pressure centrifugal pump, connected by a discharge pipe with a suction space through a discharge pipe, with a non-return valve and an on-board valve installed in it, and a suction pipe with a receiving manifold of compartments and tanks, characterized in that it is additionally in a discharge pipe a throttle device is installed and a pressure difference sensor with one cavity between the pump and the throttle device is hydraulically connected to the casting pipe and another space between the throttling device and the non-return shut-off valve.

Description

Submarine sump

The proposed utility model is relative to the cloud of shipbuilding and is designed to remove water from the compartments and tanks of the submarine overboard.

On ships, ships and floating vessels, water is discharged overboard by pumps connected to compartments and tanks, and the outboard space is thinned out by a piping system. Depending on the purpose of the system, pumps pumping water

overboard, called sump, drain or ballast. On submarines, the main pumps pumping water

from compartments and tanks overboard, are called sump These pumps

They have a wide range of feeds and pressures and an overall flow of water overboard at any depth of submersion of the submarine up to the limit.

The pump flow can theoretically be determined by the characteristics of the pump (the graphical dependence of the pressure on the pump supply), if the characteristics of the pipeline are superimposed on it (the graphical dependence of the pressure losses on the flow rate of water into the piping), while the characteristic of the pipeline is delayed taking into account the static back pressure of the seawater. The intersection of these two characteristics will determine the flow of water in the pump-pipeline system.

Currently, to determine the supply of a sump pump at a given submersion depth of the submarine, graphical dependencies of the pump feed on the immersion depth or empirical formulas are used.

MSHS: B63 V GZ / 00

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Also, the pump flow during the outflow of water from the tanks overboard can be determined by dividing the amount of water pumped out of the tank (according to the readings of the tank’s tank meter) by the pump’s operating time “

However, the above methods for determining the pump supply are not accurate enough and inconvenient to use in practice

There are various devices FOR measuring fluid flow, one of the most common is a flow throttle washer, usually made in the form of a flat | char with a twist hole in the center, installed between the pipe flanges. Differential mansisters or differential pressure sensors are used to measure the pressure drop before and after the washer. Consumption is determined by the well-known formula:

 , "Vc

where: AR is the difference in pressure before and after the puck. Pa; О - coefficient determined by an experienced track.

A simplified schematic diagram of a submarine drainage installation, which is taken as the closest analogue (VSh Narusbaev, Ao: A. Bukalov Design of nuclear submarines, 1968, l., S, 173}, is shown in Fig. I.

The installation contains: a high-pressure centrifugal pump I, communicated by a pressure pipe with an overboard space through a discharge pipe, with a non-return valve 2 and an air valve 3 installed in it, and an inlet pipe with a receiving manifold of compartments and tanks "

2

For outflow of water from compartments and tanks overboard, valves 2, 3 and BE open pump I; In this case, pump I pumps water overboard through the collector of compartments and tanks and the discharge pipe-1 conduit.

A drainage unit of known design has the disadvantage that when the water flows from the compartments and tanks overboard, control of the pump flow and accurate measurement of the flow rate of the water cast overboard are not ensured.

The objective of the utility model is to provide control over the pump flow and to accurately measure the water flow rate when the water flows from the compartments and tanks overboard in various operating conditions.

The problem is solved in that in a known submersible sump installation containing a high-pressure centrifugal pump communicated by a pressure pipe with an overboard space through a discharge pipe, with a non-return valve and an on-board valve installed in it, and a suction pipe with a receiving manifold of compartments and tanks, additionally, a throttle device is installed in the casting pipe to the casting pipe. the pressure difference sensor of one (positive) cavity between the pumps and the throttle device and the other (negative) cavity between the throttle device and the non-return valve is hydraulically connected to the wire.

The essence of the utility model is to provide control over the pump flow and accurately measure the flow rate of water cast overboard by measuring the differential pressure across the throttle

using a differential pressure sensor for the subsequent conversion of the differential pressure to the flow rate in the pipeline according to the formula (I) The conversion of the differential pressure to flow rate can be provided by the control system with information on the flow rate to the control panel of the drainage unit or according to the conversion table faith there is no control system . In (|) information about the supply of the sump pump is especially useful when performing the operation of outflow of water from tanks for trim the submarine

A simplified schematic diagram of the proposed sump installation of a submarine is shown in Fig 2.

The installation includes: a high-pressure centrifugal pump I, connected by a pressure pipe with an overboard space through a discharge pipe, with a non-return valve 2 and an air valve 3 installed in it, and a suction pipe with a receiving manifold of compartments and tanks, a throttle device installed in the discharge pipe 4 and a differential pressure sensor hydraulically connected to the casting pipe 5 plus cavity between the pump I d throttle device 4 and a negative cavity between the throttle device PTO 4 and irrevocably check valve 2.

Installation works as follows:

In the initial state, pump I is turned off, valves 2, 3 are closed.

To drain water from the compartments and tanks overboard, open valves 2, 3 and turn on pump I. The pump pumps water through the intake manifold of the compartments and tanks and the discharge pipe overboard. A pressure differential appears on the throttle device 4, which is detected by the differential pressure sensor 5. At the end of the overflow operation, the pump I is turned off, the valves 2, 3 are closed.

Claims (1)

A submarine drainage installation, comprising a high-pressure centrifugal pump, connected by a discharge pipe with a suction space through a discharge pipe, with a non-return valve and an on-board valve installed in it, and a suction pipe with a receiving manifold of compartments and tanks, characterized in that it is additionally in a discharge pipe a throttle device is installed and a pressure difference sensor with one cavity between the pump and the throttle device is hydraulically connected to the casting pipe and another space between the throttling device and the non-return shut-off valve.