In many civil engineering construction processes, the concrete pump pipe is more and more applicable scope and use scenarios. With the continuous improvement of the quality of concrete pump pipe and the expansion of t...In many civil engineering construction processes, the concrete pump pipe is more and more applicable scope and use scenarios. With the continuous improvement of the quality of concrete pump pipe and the expansion of the type of concrete pump pipe, now in the process of civil engineering construction, the application of concrete pump pipe is increasingly widespread. Pump pipe is one of the important equipment in engineering construction, its role is to transport mixed concrete, pump pipe is particularly important in high-rise buildings, can save labor, while improving the efficiency of engineering building brick. However, when pumping concrete, the pump pipe will produce strong vibration, which may lead to pump pipe rupture and support system instability collapse accident, resulting in casualties, and it is easy to destroy the cross-section size of the formwork and cause the location of the structural reinforcement to deviate, thus affecting the quality of concrete forming. For this purpose, the pump pipe needs to be fixed. The existing fixing method is to reinforce the pump pipe through the well-shaped scaffold, which is mostly rigid structure, and the impact force produced by the pump pipe in the pumping process is easy to damage the pump pipe. Based on the above situation, this paper conducts an experimental study on the impulse force generated by concrete pump pipe in the actual construction process of civil engineering and construction.展开更多
As one of the countries that use the most concrete in the world, the development of concrete industry plays an important role in promoting the economic development of our country. Therefore, the actual operation of ea...As one of the countries that use the most concrete in the world, the development of concrete industry plays an important role in promoting the economic development of our country. Therefore, the actual operation of each concrete enterprise should be paid sufficient attention to. If the actual effect of concrete enterprises can be truly brought into full play, it will have an important impact on promoting the promotion of China's comprehensive national strength. But in the development process of concrete enterprises, they often have a great impact on the natural environment. Because the concrete enterprise is a very consumption of water resources industry. In the concrete pump pipe cleaning process, it will produce a large number of waste water waste residue, these waste water and waste residue will not only produce huge pollution to the surrounding residents of water resources, but also cause a great waste of water resources. At the same time, the production of a large number of industrial waste water will also have a bad effect on the development of concrete enterprises.展开更多
Concrete pump pipe pulse force fixed device is one of the important equipment in engineering construction. Its role is to transport mixed concrete. Concrete pump pipe pulse force fixed device is particularly important...Concrete pump pipe pulse force fixed device is one of the important equipment in engineering construction. Its role is to transport mixed concrete. Concrete pump pipe pulse force fixed device is particularly important in high-rise buildings, because it can save labors, and improve the production efficiency of engineering construction. However, when pumping concrete, the pump pipe will produce strong impulse impact force, which may lead to pump pipe rupture and support system instability collapse accident, resulting in casualties, and it is easy to destroy the cross-section size of the formwork and cause the deviation of the position of the structural reinforcement, affecting the quality of concrete, thereby endangering the safety of the structure. For this purpose, the pump pipe needs to be fixed. The existing fixing method is to reinforce the pump pipe through the well-shaped scaffold, which is mostly rigid structure, and the impact force produced by the pump pipe in the pumping process is easy to damage the pump pipe. Based on the above research, this paper explores the invention of a reusable pulse force fixing device for concrete pump pipe, hoping to be helpful to other workers in the concrete industry.展开更多
A study on the character of pressure wave propagation was proposed for the gas liquid oxygen two-phase flow in the pipe between pumps.According to the practical working conditions,the homogenous model based on the com...A study on the character of pressure wave propagation was proposed for the gas liquid oxygen two-phase flow in the pipe between pumps.According to the practical working conditions,the homogenous model based on the compressibility theory regarding a single bubble in an infinite liquid,and Redlich-Kwong gas equation was derived a model for the low temperature and high pressure case,especially considering the change of the ratio of density of gas to one of liquid.The numerical tests were conducted.The results not only show the agreement between numerical simulation for this model and experiment at the normal temperature and pressure is good,but also show that the modifications of the model for the low temperature and high pressure condition are necessary.The study is of reference to further study of oscillation restrain and relative pipe tests.展开更多
This paper uses FLUENT software building the three-dimensional unsteady state model of ground source heat pump single U and double U underground pipe to study on heat exchange of underground pipe system in the conditi...This paper uses FLUENT software building the three-dimensional unsteady state model of ground source heat pump single U and double U underground pipe to study on heat exchange of underground pipe system in the condition of unsteady state long-term continuous running, analyzes the change of soil temperature filed around underground pipe and performance of underground pipe heat exchange between single U and double U pipe system. The results show that double U pipe system is better than single U system, which can improve unit depth heat exchange efficiency, reduce the number of wells and reduce the initial investment.展开更多
This paper presents the applications of vibration monitoring and a diagnosis technique on the predictive maintenance of pipe line pumps on offshore platforms. The monitored ten pumps are distributed on the past three...This paper presents the applications of vibration monitoring and a diagnosis technique on the predictive maintenance of pipe line pumps on offshore platforms. The monitored ten pumps are distributed on the past three petroleum platforms of the CACT (C: China offshove Southern; A: Agip; C: Chivron; T: Texaco) Operation Group in the Huizhou oil field. By the periodical vibration survey in recent three years, the typical faults and the vibration features of these pumps have been summarized, which set up the basis for efficient predictive maintenance of this key equipment offshore.展开更多
文摘In many civil engineering construction processes, the concrete pump pipe is more and more applicable scope and use scenarios. With the continuous improvement of the quality of concrete pump pipe and the expansion of the type of concrete pump pipe, now in the process of civil engineering construction, the application of concrete pump pipe is increasingly widespread. Pump pipe is one of the important equipment in engineering construction, its role is to transport mixed concrete, pump pipe is particularly important in high-rise buildings, can save labor, while improving the efficiency of engineering building brick. However, when pumping concrete, the pump pipe will produce strong vibration, which may lead to pump pipe rupture and support system instability collapse accident, resulting in casualties, and it is easy to destroy the cross-section size of the formwork and cause the location of the structural reinforcement to deviate, thus affecting the quality of concrete forming. For this purpose, the pump pipe needs to be fixed. The existing fixing method is to reinforce the pump pipe through the well-shaped scaffold, which is mostly rigid structure, and the impact force produced by the pump pipe in the pumping process is easy to damage the pump pipe. Based on the above situation, this paper conducts an experimental study on the impulse force generated by concrete pump pipe in the actual construction process of civil engineering and construction.
文摘As one of the countries that use the most concrete in the world, the development of concrete industry plays an important role in promoting the economic development of our country. Therefore, the actual operation of each concrete enterprise should be paid sufficient attention to. If the actual effect of concrete enterprises can be truly brought into full play, it will have an important impact on promoting the promotion of China's comprehensive national strength. But in the development process of concrete enterprises, they often have a great impact on the natural environment. Because the concrete enterprise is a very consumption of water resources industry. In the concrete pump pipe cleaning process, it will produce a large number of waste water waste residue, these waste water and waste residue will not only produce huge pollution to the surrounding residents of water resources, but also cause a great waste of water resources. At the same time, the production of a large number of industrial waste water will also have a bad effect on the development of concrete enterprises.
文摘Concrete pump pipe pulse force fixed device is one of the important equipment in engineering construction. Its role is to transport mixed concrete. Concrete pump pipe pulse force fixed device is particularly important in high-rise buildings, because it can save labors, and improve the production efficiency of engineering construction. However, when pumping concrete, the pump pipe will produce strong impulse impact force, which may lead to pump pipe rupture and support system instability collapse accident, resulting in casualties, and it is easy to destroy the cross-section size of the formwork and cause the deviation of the position of the structural reinforcement, affecting the quality of concrete, thereby endangering the safety of the structure. For this purpose, the pump pipe needs to be fixed. The existing fixing method is to reinforce the pump pipe through the well-shaped scaffold, which is mostly rigid structure, and the impact force produced by the pump pipe in the pumping process is easy to damage the pump pipe. Based on the above research, this paper explores the invention of a reusable pulse force fixing device for concrete pump pipe, hoping to be helpful to other workers in the concrete industry.
文摘A study on the character of pressure wave propagation was proposed for the gas liquid oxygen two-phase flow in the pipe between pumps.According to the practical working conditions,the homogenous model based on the compressibility theory regarding a single bubble in an infinite liquid,and Redlich-Kwong gas equation was derived a model for the low temperature and high pressure case,especially considering the change of the ratio of density of gas to one of liquid.The numerical tests were conducted.The results not only show the agreement between numerical simulation for this model and experiment at the normal temperature and pressure is good,but also show that the modifications of the model for the low temperature and high pressure condition are necessary.The study is of reference to further study of oscillation restrain and relative pipe tests.
文摘This paper uses FLUENT software building the three-dimensional unsteady state model of ground source heat pump single U and double U underground pipe to study on heat exchange of underground pipe system in the condition of unsteady state long-term continuous running, analyzes the change of soil temperature filed around underground pipe and performance of underground pipe heat exchange between single U and double U pipe system. The results show that double U pipe system is better than single U system, which can improve unit depth heat exchange efficiency, reduce the number of wells and reduce the initial investment.
文摘This paper presents the applications of vibration monitoring and a diagnosis technique on the predictive maintenance of pipe line pumps on offshore platforms. The monitored ten pumps are distributed on the past three petroleum platforms of the CACT (C: China offshove Southern; A: Agip; C: Chivron; T: Texaco) Operation Group in the Huizhou oil field. By the periodical vibration survey in recent three years, the typical faults and the vibration features of these pumps have been summarized, which set up the basis for efficient predictive maintenance of this key equipment offshore.
