Pipeline transport

FIELD: pipeline transport.

SUBSTANCE: pipeline transport has inner pipe whose at least one flexible wall is provided with at least one movable diaphragm in order to damp gas pressure oscillations. The density and pressure inside the damper space and main pipeline should be as follows ρ12, p1<p2 where ρ1 and p1 are density and pressure of gas in the space of damper and ρ2 and p2 are density and pressure of gas in pipeline, in kg/m3 and Pa, respectively. The total area of the diaphragm shell is determined from the formula where S is the total area of the diaphragm shell, m2, F is the area of the cross-section of the main pipeline, m2, m is the mass of the unit area of diaphragm, kg/m2, l is the length of the main pipeline, m, ρ is the density of gas in the main pipeline, kg/m3, K is the coefficient allowing for the properties of gas in the pipeline (temperature, humidity, and so on) and interpipe space as well as operation factors (service life, efficiency of piston machine and others), K>1.

EFFECT: prolonged service life of pipeline transport.

1 cl, 3 dwg

 

The invention relates to pipeline transport, namely the transport of fluid and gaseous media through the pipeline.

Known pipeline system, USSR author's certificate N1341444, CL F 17 D 3/02, 1987, allowing the use of annulus concentric pipes for transport purposes with the camera to maintain and regulate the permissible operating pressure in the inner pipe and the annular space. The disadvantages of this system are its limited functionality when the emergency situation, the low efficiency because of increased material costs.

These deficiencies deprived selected as a prototype pipeline transport, RF patent N2097647, CL F 17 D 1/00, 1997, made in the form of a pipeline filled with liquid or gaseous media, for supplying at least a few media additionally containing a second pipe positioned inside the first with a gap relative to the outer tube. The space between the pipes is filled with gaseous medium under pressure, and the pressure in the inner pipe is not less than 1,01 pressure in the annular space, the latter filled with inert gas. If necessary at least one of the inner tubes are made is an elastic is th. In relation to the reduction of pressure pulsations of the flow of gas or liquid spreading over the inner pipe, this design has poor efficiency, especially under dynamic loading.

There is also known a vibration damper system suction piston machine, RF patent N2065121, CL 6 F 16 L 55/04, F 04 39/00, 1996, containing the capacity of the variable volume chamber connected to the main pipe through a tightly suspended light flexible membrane connected with elastic vysokopitatelny element, for example a soft compression spring, which is limited from above by a membrane, and the lower bounding surface. Maintaining working near the equilibrium position of the membrane is carried out by regulating the external preload of the elastic element. With this design, the compensation pulse pressure in the adjacent pipeline is due to the oscillations of the membrane and springs. However, the scope of the above-described damper is limited not high enough excess gas pressure in the pipeline on which it is installed. Typically, this damper can be installed only on the suction side of the compressor or piping the first injection speed. Furthermore, the design of the absorber is quite complicated and expensive. Also the surface is piping exposed to external factors (aggressive chemical gases, dust, humidity etc), which can cause corrosion and failure of the pipeline.

The purpose of the invention is the improvement of the service life of pipeline transportation by damping gas flow propagating along the highway pipeline.

Figure 1 shows the General scheme of pipeline transport, containing the absorber pressure fluctuations in the pipeline.

Figure 2 shows the device of the vibration damper.

Figure 3 shows the principle of operation of the damper.

Pipeline transport contains the outer pipe 1, the inner pipe 2 gas 3 in the annular space, the transported product 4, a flexible membrane 5 on the elastic wall of the inner pipe, the propulsion unit 6 includes, for example, the cylinder 7, the piston 8 and the valve 9. You can also use rubber bands 10.

The system works as follows. In the cavity between the outer pipe 1 and inner 2 gas 3 with certain physical properties, namely for pressure and gas density in the volume are the following relations:

where ρ1and p1respectively the density and the gas pressure in the space of a damper, kg/m3and PA;

ρ2and R2the density and pressure of gas in the pipeline main pipeline, kg/m3and PA;

the wall of the pipeline, which is the main thoroughfare, filled with the conveyed product 4. The transported product (gas mixture) is passed through line internal piping. When this transport pressure of the product being pumped through the inner pipe can be increased by transferring part of the load from the inner pipe to the outer. Assume that the power unit 6, used for transport, made in the form of a piston machine. Then when the reciprocating movement of the piston 8 in the cylinder 7, the opening and closing of the valve 9, in the line of pipe leading to the valve 9, there are fluctuations in the pressure of the transported gas mass (e.g., air). The amplitude of the pulsations of the gas can reach significant values, which leads to increased vibration of the pipeline, causing a decrease in the wear resistance of the pipeline and the reliability of the transport system. The vibration damper containing a capacitor, formed by the annular space between the inner surface of the additional pipeline and the outer surface of the main pipeline, which are respectively the external and internal frames of a damper, can significantly reduce the ripple amplitude of the transported product 4 in the line of the inner pipe 2 due to the conversion of the Finance vibration energy of the main pipeline in the energy of the vibrations of an elastic mass of gas in the tank of the extinguisher. The effective work of the damper is achieved due to the fact that at least one elastic wall of the inner pipe contains at least one flexible membrane 5 made, for example, in the form of an elastic rubber membrane or tissue Petryanov or polymer material. Fluctuations of the membrane 5, due to pulsations of the transported product 4 in the line of the inner pipe 2, provide the dissipation of the energy of the pulse pressure and an overall reduction of pulsations. The return of the membrane in a working equilibrium position is provided by an external preload mass of gas in the annular space, and internal preload mass transported the working fluid that does not require any additional execution units.

To prevent absorption of the membrane to the inside of the pipeline 2 at high static exhaustion in the pipe 2 can be used for more elastic elements, such as rubber bands 10, fixed on the inner wall of the outer pipe.

Based on the analysis of physical processes occurring during the transport of gas or liquid through the internal pipeline, the total area of the shell membrane is selected from the following equation:

where S is the total pasadoble membrane, m2;

F is the cross-sectional area of the main pipe, m2;

m is the mass of a unit area of fabric (sheath material) membrane, kg/m2;

l is the length of pipeline, m;

ρ - density of gas in the pipeline main pipeline, kg/m3;

K - coefficient taking into account the properties of the gas in the pipeline (temperature, humidity and others) and in the annular space and operational factors (lifetime performance piston machines and others), To>1.

When the transport of the gaseous working fluid capacity of the damper can communicate with the line of the inner pipe through the openings in the inner wall of the pipeline, the number, location and dimensions of which are selected on the basis of considerations to ensure the most effective damping of the pulsations of the gas flow and design features internal pipeline.

The external piping can be installed on the outside of the inner pipe is not over its entire length, but only in the most vibration threatening area or several areas. When choosing the material of the outer pipe can be used, for example, steel GMT.

1. Pipelines, including pipeline and mounted coaxially inside the pipeline, made of elastic, thereby forming the capacitance change is on volume formed annular space, the space of the vessel is filled with gas in the following ratio: p1<p2, characterized in that for damping oscillations of a gas flow, the flexible wall of the inner pipe contains at least one movable membrane, and for the density of the gas in the volume is the ratio of:

ρ12,

where ρ1and R1respectively the density and the gas pressure in the space capacity, kg/m3and PA;

ρ2and R2the density and pressure of gas in the pipeline main pipeline, kg/m3and PA;

and the total area of the shell membrane is selected from the following equation:

where S is the total area of the shell membrane, m2;

F is the cross-sectional area of the main pipe, m2;

m is the mass of a unit area of fabric (sheath material) membrane, kg/m2;

l is the length of pipeline, m;

ρ - density of gas in the pipeline main pipeline, kg/m3;

K - coefficient taking into account the properties of the gas in the pipeline (temperature, humidity and others) and in the annular space and operational factors (lifetime performance piston machines and others), To>1./p>

2. Pipeline transport according to claim 1, characterized in that the container communicates with the line of the inner pipe through the holes in the inner wall of the pipeline, the number, location and dimensions of which are selected on the basis of considerations to ensure the most effective damping of the pulsations of the gas flow and design features internal pipeline.



 

Same patents:

Gas filling station // 2244205

FIELD: pipeline systems.

SUBSTANCE: station has compressor, pipeline for supplying gas, device for purifying gas, and flow meter.

EFFECT: expanded function possibilities.

28 cl, 4 dwg

The invention relates to pipeline transport of gas

The invention relates to control systems for gas pipelines

The invention relates to a device for reducing the hydraulic resistance when pumping liquids by pipeline and may find application in chemical, petrochemical, pharmaceutical, food and other industries associated with hydraulic viscous Newtonian and non-Newtonian liquids, suspensions and solutions

The invention relates to the oil industry, in particular to collect and transport water-saturated production of oil wells

The invention relates to the oil industry, in particular to methods of transportation gazoochistnoe mixture, and is intended for use in the system of collection and preparation of water-saturated oil at a late stage of oil field development

The invention relates to a device for the preparation of a pulse of gas used in pneumatic actuators, valves and devices for pumping gas compressor stations, gas stations, underground gas storage facilities and other facilities

The invention relates to pumping units (stations) for pumping multicomponent gas-liquid mixtures and can be used in the oil and gas industry for pumping multicomponent production wells with high and volatile gas

The invention relates to techniques for managing operations of the process gas transportation

The invention relates to gas industry

The invention relates to the field of protection measuring equipment (gauges, recording equipment and automation systems from vibrations and shock waves produced when the hydraulic system type pump equipment - pipeline

The invention relates to mechanical engineering and can be used in valves for damping pressure pulsations of the working environment

The invention relates to a device for damping pressure pulsations in piping systems and can be used in injection systems, water supply and land reclamation

The invention relates to mechanical engineering and can be used to enhance the security of the loaded pressure of the pressurized system fluid used in nuclear, chemical and other industries

The invention relates to dampers pulsation of the liquid and can be applied in the oil, gas and other industries

The invention relates to a device for damping pressure pulsations in piping systems TTD and can be used in pipeline systems for water supply and land reclamation

Radiator // 2177581
The invention relates to cooling devices and can be used as an intermediate element when connecting the pressure transducer to the backbone of the medium

The invention relates to the field of operation of pipeline systems and can be used in oil, gas and other industries for damping pressure pulsations of the fluid

Pipeline transport // 2245487

FIELD: pipeline transport.

SUBSTANCE: pipeline transport has inner pipe whose at least one flexible wall is provided with at least one movable diaphragm in order to damp gas pressure oscillations. The density and pressure inside the damper space and main pipeline should be as follows ρ12, p1<p2 where ρ1 and p1 are density and pressure of gas in the space of damper and ρ2 and p2 are density and pressure of gas in pipeline, in kg/m3 and Pa, respectively. The total area of the diaphragm shell is determined from the formula where S is the total area of the diaphragm shell, m2, F is the area of the cross-section of the main pipeline, m2, m is the mass of the unit area of diaphragm, kg/m2, l is the length of the main pipeline, m, ρ is the density of gas in the main pipeline, kg/m3, K is the coefficient allowing for the properties of gas in the pipeline (temperature, humidity, and so on) and interpipe space as well as operation factors (service life, efficiency of piston machine and others), K>1.

EFFECT: prolonged service life of pipeline transport.

1 cl, 3 dwg

Up!