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Performance Analysis and Experiment Study of Pumping System of Trailer Concrete Pump

Author: SongChunLei
Tutor: LiuZuoZuo
School: Jilin University
Course: Mechanical and Electronic Engineering
Keywords: Stationary concrete pump Swing system Cushion Accumulator Distributing valve of S types Throttle valve Dynamic simulation
CLC: TU646
Type: Master's thesis
Year: 2005
Downloads: 214
Quote: 1
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Abstract

In the course of concrete construction, the transportation and moulding of the concrete is a strenuous and important work. That needs rapidly, in time, ensures the quality of products and reduces work time, Especially to some large-scale armored concrete structures (the foundation of heavy-duty equipment, underground project ,etc. ) and skyscraper, how to correctly choose the concrete’s transport and the methods of building to be even more important, that often determines the work time and work force. Concrete transport pump are used more and more in modern construction site, that can once finish competence transporting and vertical transportation in succession , with high efficiency, low workforce and expenses, especially to construction site of narrow and having the barriers where the other transport is difficult close to constructing site directly, however the concrete pump can work effectively. The distance of concrete pump transport is long, more units in certain time, The pump can reach the summit of skyscraper two or three hundred meters high, millions of cubic meter of large-scale foundations can scratch and build within short time also, The other means can’t compare with it, so it’s superiority is very remarkable, therefore it is popular and applied for a long time in the industrially developed country, especially the combination of the mix concrete production and pump sending constructing change the appearance of construction site , concrete of project completely in advance especially. In these years large scale construction has raised in our country, the pump sending concrete is also developed very much in our country. Shanghai, etc. have developed pump sending concrete technology long time ago, the proportion of pump sending concrete and the techniques of concrete pump sending have already been close to the advanced international standards in concrete project amount. The concrete pump has high quality assurance and high efficiency, very good economic benefits , and very important meaning to carry out production strictly in line with rules and regulations of the construction site, and gain the favor in the building trade more and more. The hydraulic pressure system is one of the most important components in the concrete pump, the design not merely having very great influence on technical feature of the concrete pump, but also is essential to the security and dependability of working to the concrete pump complete machine. The swing system is also a very important part in the hydraulic pressure system, it’s performance of reversing influences directly the quality of concrete pump (stop up question of in charge, transport volume efficiency and working dependability ,etc. for instance), But swing jar produce enormous vibration and noise for it’s high speed and heavy mass force . So, if it is not done good about the problem of buffer, the vibration characteristic will be affected greatly, and it’s working life and the health of workers. So speaking from this meaning, it is initiative methods to solve reasons produced in vibration and noise from hydraulic pressure system. So, after analyze detailed and deeply to the concrete swing system, we put forward improvement methods to the study in text, and have made a large amount test to the buffer of jar, have solved the systematic buffer problem of swinging for a certain degree. This text is divided into five chapter altogether. Chapter 1:explained the development overview of concrete pump and the development of pump sending technology at home and abroad at first, then introduced the concrete pump briefly and swung the hydraulic pump and type and performance of assigning the valve in the system, explained concrete purpose and content of studying in a subject at the same time . Chapter 2:the swing system and components: Introduce the principle of plunger cylinder, accumulator , four way valve and distributing valve of S types and analyze detailed and differentiated the quiet, dynamic characteristic of Accumulator and dynamics characteristic of distributing valve of S types. By the analyses on characteristic of accumulator ,It is concluded that, increased the gas pressure before gasbag fill oil the size of the device can be reduced. As the pressure of Accumulator is two times as much as the system working pressure , can hold output effective energy of device is most effective. And because of P1 V 1=G, as it’s volume confirmed, as the more G ,the pressure P1 turn higher before filling the oil. Through analyzing about the characteristic of distributing valve of S types we can learn that, as the moment of swinging the acting on distributing valve of S types mainly caused by the axial thrust which cut the ring because of the concrete with pump sending pressure. And through the analysis we list the concrete pump and swung the systematic mathematics model originally, then set up the mathematics model emulation by using Simulink toolbox in MATLAB finally. Chapter 3:introduce in detail to the systematic operation principle of swing after improving at first, and the flow of the concrete research throttle valve and quiet, dynamic characteristic, thus we can learn that, it’s working performance is the best if a L (claim water conservancy radius ) is the biggest and passage shortest(throttle port of slice shape), a L is the area of throttle valve port a compared with the sectional perimeter of valve L (wet perimeter). Because go

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CLC: > Industrial Technology > Building Science > Construction machinery and equipment > Concrete machinery and equipment > Concrete, mortar transport machinery
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