RU2245476C1 - Flexible deep-well pipeline - Google Patents

Abstract

FIELD: pipeline transport.

SUBSTANCE: flexible pipeline comprises several pulp lines provided with chambers with ball check valves and interconnected through piping diaphragms. The outer surface of the pulp line is provided with a displacement device for movement along the pipeline. The sections of pulp lines receive shell made of layers of syntactic and polyurethane, the ratio of thicknesses of which is (10-4):1. The displacement device affects the piping diaphragm, pumps hydraulic mixture from the bottom section to the next one which is arranged above the check valve, and moves along the outer side of the pulp line to the next piping diaphragm mounted above.

EFFECT: expanded functional capabilities.

3 dwg

Description

The invention relates to the field of development of underwater mineral deposits and is intended for slurry pipelines of complexes operating at great depths.

A flexible submersible slurry pipeline is known, containing several sections of slurry pipes articulated to each other, additionally provided with a sealed shell, coaxially mounted on the slurry pipe, provided that the centers of gravity of the shell and pipe coincide and the following inequality is satisfied:

where M _joint , V _joint , M _cm , V _cm , M _Tr , V _Tr , M _about , V _about - respectively the mass (kg) and volume (m ³ ) of the hinge, hydraulic mixtures, pipes and shells, ρ _in - the density of water, the shell is made of syntactic with a specific gravity of 0.5-0.6 t / m ³ and in the form of rigidly connected half-cylinders, covering the pipe along the entire diameter. (RF patent No. 2157438, E 02 F, 7/02, Bull. No. 28, 10.10.2000).

The known flexible submersible slurry pipeline has a limited depth with which it is possible to transport the slurry due to the resistance in a large number of articulated joints when working from depths greater than 200 meters, and has an external surface unsuitable for moving the displacing device along it.

A floating peristaltic pump is known, comprising a craft with storage capacity, launching and lifting equipment, a vertical pipeline with tubular diaphragms, a suction device and a displacement device including a valve body housed in a combustion chamber body with movable spring-loaded covers with dampers and a feed system and ignition of the fuel, characterized in that the pump is equipped with check valves that divide the vertical pipe into sequentially located along the height of the chamber, and the displacing device is made in the form of combustion chambers radially arranged on the periphery of the pipeline adjacent to tubular diaphragms with the possibility of interaction with hoisting devices (USSR author's certificate No. 1749554, F 04 F, 1/4, Bulletin No. 27, 07.23.1992 ) - PROTOTYPE.

The disadvantage of a vertical pipeline with tubular diaphragms is the large weight of the sections, which interferes with installation and dismantling at great depths.

The objective of the invention is to improve the operational capabilities (during installation and dismantling) of a flexible submersible pipeline for hydrotransport of pulp from great depths.

The problem is solved in that a flexible submersible pipeline containing several sections of slurry piping, including chambers with check valves interconnected by tubular diaphragms, a displacing device mounted to move along the surface of the slurry piping, according to the invention, a sheath made of syntactic and polyurethane layers with a ratio of layers (10-4): 1, while satisfying the following inequality:

wherein M _cm, V _cm, M _tr, V _tr, M _syn, V _syn, M _field, V _floor, M _IRIS, V _IRIS, M _kok, V _cook - respectively the mass (kg) and the volume ^(m3) of slurry, a slurry pipe, a syntactic cylindrical shell, a polyurethane cylindrical shell, a tubular diaphragm and a chamber with a non-return valve, ρ _в is the density of water, and non-return valves are made of ball valves.

The device of a flexible submersible pipeline is illustrated by drawings, where

- figure 1 is a General view of a flexible submersible pipeline with a displacing device,

- figure 2 is a section of a slurry pipe,

- figure 3 - connection diagram of the sections with a tubular diaphragm.

A flexible submersible pipeline consists of several sections of the slurry pipes, and each section contains the metal part of the slurry pipes 1, a chamber 2 with a check valve 3 (Fig. 2 and Fig. 3) and a tubular diaphragm 4. The displacing device 5 moves along the sections.

Inside the slurry pipe 1, there are cylindrical shells made of syntactic 6 and polyurethane 7, for sealing between the pipe diagram 4 and the metal part 1 of the slurry pipe, round gaskets with an ellipsoid cross-section are installed 8. The displacing device 5 moves on the wheels 9 with a rope 10 .

In figure 3. The arrangement of syntactic and polyurethane layers in a slurry pipe is shown. The thickness of the polyurethane layer is small and depends on the abrasive properties of the pulp, while the following inequalities are satisfied:

wherein M _cm, V _cm, M _tr, V _tr, M _syn, V _syn, M _field, V _floor, M _IRIS, V _IRIS, M _kok, V _cook - respectively the mass (kg) and the volume ^(m3) of slurry, slurry pipe, cylindrical shell made of syntactic, cylindrical shell made of polyurethane, tubular diaphragm, chamber with non-return valve, ρ _в - density of water.

The thickness of the syntactic layer can be different depending on the depth with which the pulp is transported and is taken in proportion to the thickness of the polyurethane from 4: 1 to 10: 1. Using round with an ellipsoidal cross-section of the gaskets 8, the tightness of the connection of the tubular diaphragms 4 with the metal wall 1 of the slurry pipe is ensured.

Flexible submersible pipe works as follows.

The displacing device 5, acting on the tubular diaphragm 4 with high pressure, pushes the hydraulic mixture from the lower section (section I-I, figure 1) to the next (section II-II) located above the check valve 3.

Then, the displacing device 5 on the wheels 9 moves upward through the pipeline to the next upstream tubular diaphragm 4 and, acting under high pressure, pushes the slurry to the next upstream section and so to the very top, from where the slurry is poured into the storage tank on the ship (in figures 1, 2 , 3 not shown).

From the upper position, the displacement device 5 descends through the pipe down to the mining complex at the bottom of the oceans (not shown in Figs. 1,2,3). The outer surface of the flexible submersible pipe allows the displacement device 5 to move on wheels 9 up and down.

As a result of using the present invention, a technical effect is achieved - a flexible submersible pipeline is created for work at great depths.

Claims (1)

A flexible pipeline containing several sections of slurry pipes, including chambers with non-return valves, interconnected by tubular diaphragms, a displacing device mounted to move along the surface of the slurry pipes, characterized in that a shell made of syntactic and polyurethane layers is located inside the sections of the slurry pipes with the ratio of the thicknesses of the layers (10-4): 1 while satisfying the following inequality:

wherein M _cm, V _cm, M _tr, V _tr, M _syn, V _syn, M _field, V _floor, M _IRIS, V _IRIS, M _kok, V _cook - respectively the mass (kg) and the volume ^(m3) of slurry, a slurry pipe, a syntactic cylindrical shell, a polyurethane cylindrical shell, a tubular diaphragm, a chamber with a non-return valve, ρ _in is the density of water, and non-return valves are made of ball.

Images