RU4275U1 - WATER DRAINAGE INSTALLATION OF A SUBMARINE - Google Patents

Abstract

A submarine drainage installation, comprising a high-pressure centrifugal pump, connected by a discharge pipe with an overboard space through a discharge pipe, with a non-return valve and an on-board valve and a suction pipe with a collector for compartments and tanks installed in it, which are additionally installed at the outlet of pump in series throttle devices, each of which is equipped with a bypass channel with a shut-off valve installed in it, and to the suction ubku pump hydraulically connected to the pressure sensor.

Description

Submarine Sump Plant

The proposed utility model relates to the field of shipbuilding; I am intended to remove water from the compartments and tanks of a submarine overboard.

On ships, ships and floating equipment, water overflow is carried out by pumps communicated from the compartment and tanks, as well as with the outboard piping system; Depending on the purpose of the system, pumps that pump water overboard are called sumps, exhausters, or

In submarines, again, they call water sumps. These naoons have a wide range of feeds and heads and provide water discharge overboard at any depth of submersion to the maximum pressure characteristic of these pumps so that the pump cushion decreases with increasing backpressure of the water ,, t1e. increasing the depth of poses: fishing.

The operation of sump pumps, like any other suction pump, is limited by the permissible vacuum height of the suction, at which the pump is operated without changing the main technical parameters. When the pump is operating, the vacuum gauge suction height must not exceed the permissible vacuum gauge suction height of the pump.

According to GOST 17398-72 Pumps. Terms and Definitions

MKI device object: B63 BI3 / 00

Vacuum measuring suction height: determined by the formula:

Po - environmental pressure. Pa;

Rn - pressure at the inlet to the pump, Pa;

P is the density of the liquid medium, kg / n,

n - the speed of the liquid medium on the back of the pump, m / s;

 - acceleration of gravity.

As can be seen from the above formula, the vacuum gauge suction height decreases with increasing pressure at the pump inlet

An increase in pressure at the inlet to the pump in a submarine can be achieved by pressurizing the drained compartment or tank with compressed air to a pressure above atmospheric.However, the pressurization of the compartments and tanks leads to the consumption of compressed air, the reserves of which are limited in the submarine.

A device is known for creating additional pressure at the inlet of a sump pump in order to ensure operation of the pump with large trim, which is used on American submarines - this is the installation of additional submersible pumps that supply water to the sump pump (V.M. Narusbaev, A.A. Bukanov Design of nuclear submarines, 1968, l, 0.172-173). However, the installation of additional submersible pumps complicates the design of the system and complicates the management of the system, as additional mechanisms appear.

Devices are also known that provide control and regulation of the operation of suction pumps designed for outflow of water overboard.

For instance:

1) the ballast system of the floating means, equipped with a sensor of the ballast pump, connected by its output to the regulatory body, while the pump operation sensor is made

in the form of a pressure switch, connected to the output of the ballast pump Ca. J 958207);

2) a floating ballast system containing a ballast pump with a regulator installed at its outlet, main and additional measuring organs hydraulically connected with their outputs to the suction and discharge nozzles of the ballast pump (AS No. 962090).

Other devices are also known that monitor and regulate the operation of pumps of various systems of ships and floating equipment and contain measuring and regulatory bodies (a.s., Ш 988642, 1260290, 1404404, etc. O.

A simplified schematic diagram of a submarine drainage installation, which is adopted as a closer analogue (V.M. Narusbaev, A.A. Bukalov Design of nuclear submarines, 1968, l, p. 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 a suction pipe with a receiving manifold of compartments and tanks.

To drain water from the compartments and tanks overboard, valves 2, 3 are opened and pump I is turned on. In this case, pump I pumps water from the compartments and tanks overboard through the collector of compartments and tanks and the discharge pipe: At the end of the operation, the pump is turned off, the valves that open are closed.

The known design of the drainage unit has drawbacks in that, when performing the operation of pouring water from the compartments and tanks overboard, the control and the possibility of peeling the vacuum suction height of the pump are not provided

The objective of the utility model is to provide control and the ability to control the vacuum gauge of the suction height of the pump during the operation of the outflow of water from the compartments and cysts overboard in various operating conditions

The problem is solved in that in a known submersible installation of a submarine containing a high-pressure centrifugal pump, connected by a pressure head pipe with an overboard space through an EXCELLENT pipeline, it is equipped with a non-return valve and side valve, and a suction pipe with a receiving manifold, compartments and tanks additionally installed at the outlet of the pump are serially connected throttle devices i: each of which is equipped with a bypass channel with a shut-off valve installed in it, and to the suction it conduit pump hydraulically lodklyuchen absolute pressure sensor.

The essence of the utility model is to provide the ability to control the flow rate of water pumped from the compartments and tanks overboard by throttling the flow of water exiting the pump into the discharge pipe, and thereby provide the ability to control pressure losses in the collector of compartments and tanks, which have a significant impact the pressure at the inlet to the pump and, consequently, the vacuum gauge height

suction of naoos. So, with a decrease in the flow rate of water in the intake manifold, pressure losses in it decrease, the pressure at the inlet to the pump increases, and the vacuum gauge suction height decreases. Tayuka the essence of the utility model is to provide control over the vacuum gauge suction height when the pump is running by measuring the absolute pressure at the pump inlet using an absolute pressure sensor.

A simplified schematic diagram of the proposed submersible sump installation is shown in FIG. 2.

The installation contains: a high-pressure centrifugal pump I, connected by a discharge pipe with an overboard space through the discharge pipe, with a permanently installed shut-off valve 2 and an on-board valve 3, and a suction pipe with a receiving manifold of compartments and tanks installed at the pump outlet and connected in series with throttle device 4, 5, and each of which is equipped with a bypass channel with shut-off valves 6, 7, and an absolute pressure sensor 8, hydraulically connected to the pump inlet,

The installation works as follows: in the initial state, pump I is turned off, valves 2, 3, 6, 7 are closed;

To drain water from the compartments and tanks overboard, open valves 2, 3, b, 7 and turn on pump D. The pump pumps water through the intake manifold of the compartments and tanks, the drain pipe and the bypass channels of the throttle devices 4, 5 with a maximum flow rate (volumetric water flow ), possible with the current counterpressure of sea water (depending on the submersion depth of the submarine). When this is the pressure loss in the collector of compartments and tanks, the maximum, as they are proportional to the flow rate to the second degree.

The sensor 8 measures the absolute pressure at the inlet to the pump, which indicates the vacuum gauge of the suction height of the pump. If the suction height exceeds the permissible one, the pressure at the inlet to the pump is less than the permissible one, close the valve 6 n the pump I starts pumping water on board through the throttle device 4, and the flow rate of pump I (volumetric water flow) is reduced, and therefore the pressure loss in the intake manifold compartments and tanks. The increase in pressure at the inlet to the pump is controlled by the readings of pressure gauge 8. If necessary, further increased: pressure at the inlet to the pump closes valve 7 and pump I starts to pump water through both throttling devices 4, 5, while the flow of pump I becomes minimal, and consequently, the pressure loss in the manifold becomes minimal i At the end of the overflow operation, the pump I is turned off and the open valves are closed

Claims (1)

A submarine drainage installation containing a high-pressure centrifugal pump communicated by a discharge pipe with an overboard space through a discharge pipe, with a non-return valve and an on-board valve and a suction pipe with a collector for compartments and tanks installed in it, which are additionally installed at the outlet of pump in series throttle devices, each of which is equipped with a bypass channel with a shut-off valve installed in it, and to the suction ubku pump hydraulically connected to the pressure sensor.