Heat System for Rigid Wedge Valves

Bazarov, A. A.; Bondareva, N. V.; Navasardyan, A. A.

doi:10.1007/978-3-030-54817-9_149

Cited by 2 publications

(5 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…1. Геометрическая модель задвижки с конусообразным корпусом В работе [5] показано, что деформации корпуса и возникающие напряжения в системе «седло -клин» при изменении температуры в силу различия физических свойств и геометрической несимметрии зависят от места расположения рассматриваемых точек. В ходе анализа процессов возникновения напряжений в задвижке выполнено моделирование процессов деформации в симметричной и несимметричной конструкциях и исследование влияния формы на величины деформации и напряжений.…”

Section: формулировка задачиunclassified

“…Линеаризация данной задачи затруднена, так как сама природа возникновения конвективного движения жидкости связана с объемным расширением за счет нагрева. Для упрощения модели были проведены исследования процесса нагрева задвижки [5]. Было выяснено, что вихри жидкости имеют две области.…”

Section: формулировка задачиunclassified

“…Неучет гидродинамики вносит погрешность в расчеты, однако компенсируется снижением теплового потока между стенкой корпуса и клином за счет конвективного теплопереноса в верхние слои жидкости. В работе [5] исследованы процессы переноса тепла с одновременным движением жидкости в задвижке. Условия одинаковы для обеих задач.…”

Section: формулировка задачиunclassified

“…Проведенные исследования термодеформационных процессов на упрощенной численной модели задвижки показали сложный характер процессов и неоднозначность при определении зон нагрева корпуса [5].…”

Section: Introductionunclassified

See 3 more Smart Citations

Riddance jamming of pipeline shut-off valves

Bazarov

Александрович²,

Bondareva

et al. 2021

Vestnik of Samara State Technical University. Technical Science

View full text Add to dashboard Cite

The paper conciders the problems of modeling the processes of thermal deformation of valves with an ambient temperature decrease. Some type of wedge valves are exposed to jamming. Heating the valve body is used to eliminate jamming. This problem is common for rigid wedge valves but the reasons not fully explained. Sometimes the valve stem is destroyed due to the significant power of the gate valve electric drives. The aim of the study is to determine the nature of the stress distribution between the structural elements of the valve, which are the cause of jamming with an ambient temperature decrease, and to search for the parameters of the heating process that ensure minimum energy consumption and time. To study the thermal processes in the valve body, a numerical model describing the heat transfer in the structural elements and the fluid is developed. The thermal model is combined with the elastic deformation model. That allows to make compatible calculations without introducing additional errors. The thermal deformations appear in the cooling process and give rise to disproportionate changes in valve dimensions and thermal stresses. Thermal stresses are the cause of jamming. Modeling of the processes of thermal deformation with a decrease in temperature showed that pressure forces of different signs arise in the middle plane of the wedge. At the average height of the horizontal line, there is a compacting pressure and at the lower and upper points there is a stretching pressure. To eliminate the compacting forces local heating was performed in several areas of the body. It was found that the most effective option is to heat the lower hemispherical surface of the body. Heating for thirty minutes reduces the thermal stresses in the wedge and compressive forces to minimum values. For this reason, jamming of the valve is eliminated. For heating the body, a hemispherical induction heater with a magnetic core is provided. The proposed design allows the use of industrial frequency voltage without a step-down transformer and reactive power compensation.

show abstract

Section: формулировка задачиunclassified

Section: Introductionunclassified

See 2 more Smart Citations

Riddance jamming of pipeline shut-off valves

Bazarov

Александрович²,

Bondareva

et al. 2021

Vestnik of Samara State Technical University. Technical Science

View full text Add to dashboard Cite

show abstract

“…Bazarov et al [24] developed wedge valve fittings containing a cover connected to a body that houses a valve assembly controlled by a spindle sealed against the cover. However, in this design, the weld seam that welds the bottom to the body is destroyed if the pressure inside the valve increases above the critical value when the working fluid freezes due to a change in ambient temperature.…”

Section: Introductionmentioning

confidence: 99%

Consideration of Temperature Factors when Designing Butterfly Check Valves for Hazardous Production Facilities

Soboleva,

Kerimov,

Lampezhev

2023

Civ Eng J

View full text Add to dashboard Cite

The safety of hazardous production facilities is directly related to the reliability of pipeline systems, which must be ensured regardless of environmental conditions. Accidents on pipeline sections can have catastrophic consequences associated with damage to human health and the environment. Damage to the metal of pipeline elements during operation due to internal corrosion occurring under the influence of the working fluid is one of the main reasons for failure. This study aims to develop an improved butterfly check valve (BCV), which is a pipeline element. For this purpose, various structural materials used in the production of check valves were analyzed, and the changes in their mechanical properties under the influence of temperature were also considered. Based on this material, a butterfly check valve was developed. The stress-strain state of the developed structure was assessed using the finite element method (FEM). Strains, stresses, and displacements were calculated to evaluate valve performance. These calculations are necessary to determine the most loaded elements of the BCV at the maximum and minimum ambient temperatures. The following conclusions were obtained: X6CrNiTi18-10 stainless steel grade is the most suitable material for piping systems transporting liquids in production facilities. On the basis of the simulation results, the values of equivalent stresses, maximum strains, and displacements were obtained. The research results confirmed the performance of the improved design, the unhindered motion of the working fluid in the working direction, and the convenient connection to horizontal and vertical sections of the pipeline. Doi: 10.28991/CEJ-SP2023-09-020 Full Text: PDF

show abstract

Heat System for Rigid Wedge Valves

Cited by 2 publications

References 5 publications

Riddance jamming of pipeline shut-off valves

Riddance jamming of pipeline shut-off valves

Consideration of Temperature Factors when Designing Butterfly Check Valves for Hazardous Production Facilities

Contact Info

Product

Resources

About