RU2792384C2 - Pressure stabilizer damping device - Google Patents

Abstract

FIELD: pipeline transport.

SUBSTANCE: device designs aimed to effectively reduce the damaging effects of pulsations and pressure dips (water hammer effect) on pipelines for various purposes, diameters and a wide range of working medium pressures. The pressure stabilizer for pipeline systems of a wide range of working pressure of the pumped medium with small, medium and large flow diameter contains a section of the central perforated pipeline, covered by an antechamber with a damping chamber placed outside it, equipped with a movable element in form of an elastic deformation cylinder with elliptical cross-section, filled with elastic elements located coaxially to generatrix of the damping chamber, and the latter, made with one removable plug, is connected to the antechamber by two pipes having the properties of "inlet" and "outlet" of the damping chamber in the direction of the working medium.

EFFECT: invention should provide an increase in operational properties, a reduction in weight and a simplification of the design of the pressure stabilizer.

5 cl, 3 dwg

Description

The invention relates to pipeline transport in terms of designs of devices designed for emergency protection of pipelines and equipment by damping (reducing to an acceptable level) wave (dynamic component of hydraulic shock pressure, forced self-oscillations, resonant phenomena) and vibration processes that occur in pipelines at a stationary, regular transitional and emergency operation of hydraulic systems for various purposes and diameters.

A pressure stabilizer is known, consisting of a perforated pipeline with connecting pipes and a damping chamber enclosing it, which is made in the form of a cylindrical tube of elastic material, covered by a rigid casing. The annular space between the casing and the tube is filled with an insert made of an elastic material with recesses and (or) cavities distributed over its surface of various shapes (Patentee LLC Venture Projects JSC Business Consulting Moscow. Liquidated in 2006. Pressure stabilizer. Description of the invention to the patent Russian Federation No. 2144641 in class F16L 55/04, published on 01/20/2000).

The disadvantages of this device are the complexity of the design; low efficiency at high operating pressures; small useful volume of the damping chamber, leading to a significant increase in the number of pressure stabilizers when it becomes necessary to increase the coefficient of damping of wave oscillations; unsuitability for work in hydraulic systems for transportation of aggressive media (oil, stable gas condensate, liquid ammonia, kerosene); the formation of stagnant zones and low performance properties.

The tasks to be solved by the proposed approaches are to simplify the design, increase the efficiency of the damping chamber by increasing its usable volume, eliminating stagnant zones by changing the direction of the flow of the working medium and using the properties of cavitation processes in it, reducing weight and size characteristics, improving operational properties and efficiency of the product as a whole at high pressures of the working medium and its heterogeneity.

The technical result is achieved by the fact that the pressure stabilizer for pipeline systems of a wide range of working pressures of the pumped medium of small, medium and large bore diameter contains a section of the central perforated pipeline, covered by a pre-chamber with a damping chamber placed outside it, equipped with a movable element in the form of an elastically deformable elliptical cylinder section, filled with elastic elements located coaxially forming the damping chamber, according to the invention, the damping chamber is made with one removable plug, connected to the pre-chamber by two nozzles having the properties of "input" and "output" of the damping chamber in the direction of movement of the working medium.

The damping chamber of the pressure stabilizer is made in an elongated housing.

The movable element of the damping chamber is made in the form of an elastically deformable sealed metal or non-metal cylinder of elliptical cross section, fixed on the pressure plate.

The elastic element of the damping chamber, located in the elastically deformable cylinder of elliptical cross section, is made in the form of an elongated elastic material, in the cross section having the shape of a thin-walled elastic tube.

The movable element of the damping chamber in the form of an elastically deformable sealed metal or non-metal elliptical cylinder, neutral to most types of pumped liquids, allows it to be effectively used in various environments, including oil, stable gas condensate, liquid ammonia, kerosene.

At the same time, the elongated cylindrical part of the damper, on the one hand, is plugged with an elliptical bottom, on the other hand, it is closed with an elliptical cover by means of a flange connection. Inside the damper housing, with the help of a thrust ring and a pressure plate, a replaceable elastically deformable metal or non-metal cylinder of elliptical section is placed, which is an elastic separator filled with elastic elements in the form of fluoroplast tubes.

In FIG. 1 shows a pressure stabilizer, figure 2 - damping chamber, figure 3 - elastic damping elements placed in the inner cavity of the elastic separator.

The pressure stabilizer (Fig. 1) consists of a section of the central perforated pipeline 1, enclosed in a cylindrical pre-chamber 2, which communicates with the damper 3 taken out of it by means of branch pipes 6. The damping chamber 3 (Fig. 2) contains an elastically deformable cylinder of elliptical cross section ( separator) 4 and elastic-damping elements 5 (Fig. 3), placed in the inner cavity of the elastic separator, and capable of deforming in the direction of the alternating impact of perturbations.

Operating principle

Moving through the pipeline, the working environment forms various nature (emergency power outages, failures of the control and automation systems, human factor, etc.) and frequencies (pumping frequency, natural frequency of pipelines, frequency of supports, resonant phenomena, etc.) pulsations, dips (jumps ) pressure and water hammer.

When the working medium (water, aggressive and non-aggressive liquids, etc.) passes through the dissipative holes of the perforated section of the central pipeline 1 of the pressure stabilizer, the cavity of the prechamber 2 and the hydraulic cavity (on the outside of the elastically deformable cylinder of elliptical section) of the damping chamber 3 are filled.

The pressure jump (wave, water hammer), propagating through the pipeline, successively through the nearest and more distant pipes 6 along the movement of the working medium, affects the elastically deformable cylinder of elliptical section 4. The deformation of the elastically deformable cylinder of elliptical section (separator) 4 occurs and simultaneous compression - expansion (deformation) of the elastic elements 5 (figure 2) in one direction or another (depending on the sign of the pressure jump). In this way, the damping of the pulsation (pressure surge, water hammer) is carried out.

The main advantages of the design are:

the interaction of a wave (water hammer) with an elastically deformable cylinder of an elliptical section occurs on a much larger area compared to existing structures;

the possibility of increasing the efficiency of the product (damping water hammers of greater power and duration) with minor changes in the weight and size characteristics of its design by attaching it to the body of the prechamber 2 using two nozzles 6;

exclusion of stagnant zones in the damping chamber by attaching it to the body of the pre-chamber 2 using two nozzles 6;

a significant reduction in the scope of work during service maintenance and an increase in the period of interservice maintenance.

Claims (5)

1. Pressure stabilizer for pipeline systems with a wide operating pressure range of a pumped medium of small, medium and large bore diameter, containing a section of a central perforated pipeline, covered by a pre-chamber with a damping chamber placed outside it, equipped with a movable element in the form of an elastically deformable cylinder of elliptical cross-section, filled with elastic elements located coaxially forming the damping chamber, characterized in that the damping chamber, made with one removable plug, is connected to the pre-chamber by two pipes having the properties of "inlet" and "outlet" of the damping chamber in the direction of movement of the working medium. 2. The pressure stabilizer according to claim 1, characterized in that the damping chamber is made in an elongated housing. 3. The pressure stabilizer according to claim 1, characterized in that the movable element of the damping chamber is made in the form of an elastically deformable sealed metal or non-metal cylinder of elliptical cross section, fixed on the pressure plate. 4. The pressure stabilizer according to claim 1, characterized in that the elastic element of the damping chamber, located in an elastically deformable cylinder of elliptical cross section, is made in the form of an elongated elastic material, in cross section having the shape of a thin-walled elastic tube. 5. The pressure stabilizer according to claim 1, characterized in that the movable element of the damping chamber in the form of a resiliently deformable sealed metal or non-metal cylinder of elliptical cross section, which is neutral to most types of pumped liquids, makes it possible to effectively use it in various environments, including oil, stable gas condensate, liquid ammonia, kerosene.

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