The principle of small concrete mixer truck is that the chassis shows the driving force to drive the variable displacement piston pump of hydraulic transmission system, converts the mechanical kinetic energy into hydraulic function and transmits it to the quantitative analysis motor. Then, according to the reducer, the mixing drum is driven to rotate, and then the concrete is forced to mix, so that it is not easy to condense in a special time. Because of the working characteristics, two different working modes are generally adopted according to the length of concrete transportation distance, construction site standards and the different conditions of concrete quality and preparation.
1.預(yù)拌混凝土的攪拌運(yùn)輸。將在攪拌站攪拌好的混凝土立即裝進(jìn)攪拌車中運(yùn)輸，在小型混凝土攪拌車運(yùn)輸中途，攪拌筒大概以1～3r/min轉(zhuǎn)速比旋轉(zhuǎn)，使筒內(nèi)混凝土持續(xù)攪拌，防止混凝土離析狀況，以確?；炷疗焚|(zhì)。這類方法運(yùn)輸混凝土的間距不適合太長，一般操縱在混凝土初凝之前，依據(jù)混凝土配制和實(shí)時(shí)路況、氣溫等標(biāo)準(zhǔn)可定下距離或時(shí)間。
1. Mixing and transportation of ready mixed concrete. The concrete mixed in the mixing plant shall be immediately loaded into the mixer truck for transportation. In the middle of the transportation of the small concrete mixer truck, the mixing drum shall rotate at the speed ratio of 1-3 R / min to make the concrete in the cylinder continuously mix, prevent the concrete segregation, and ensure the concrete quality. The distance or time can be set according to the concrete preparation, real-time road conditions, air temperature and other standards before the initial setting of concrete.
2.混凝土拌和料的攪拌運(yùn)輸。一般有2種狀況：顆粒料和水料攪拌運(yùn)輸。顆粒料灌水?dāng)嚢柽\(yùn)輸：在調(diào)料站將料石、混凝土等顆粒料按混凝土配制添加攪拌筒內(nèi)，再將攪拌自來水添加車?yán)飪?chǔ)水箱，在中途適度的間距或時(shí)間將水噴到筒內(nèi)，對(duì)混凝土開展攪拌，也可去施工工地后攪拌。水料攪拌運(yùn)輸：在調(diào)料站將料石石料、混凝土和水等拌和料按配制另外裝進(jìn)攪拌筒內(nèi)，攪拌筒在運(yùn)輸中途以8～12r/min的轉(zhuǎn)速比旋轉(zhuǎn)，對(duì)拌和料開展攪拌，進(jìn)行攪拌工作。
2. Mixing and transportation of concrete mixture. Generally, there are two conditions: granular material and water material mixing and transportation. Irrigation, mixing and transportation of granular materials: in the mixing station, the aggregate, concrete and other granular materials are added into the mixing drum according to the concrete preparation, and then the mixing tap water is added to the water storage tank in the vehicle, and the water is sprayed into the cylinder at an appropriate interval or time in the midway to mix the concrete, or go to the construction site for mixing. Mixing and transportation of water and materials: in the mixing station, the materials such as stone, concrete and water are separately loaded into the mixing drum according to the preparation. The mixing drum rotates at a speed ratio of 8-12r / min in the midway of transportation to carry out mixing and mixing work.
所述2種方法對(duì)比，前面一種更能增加對(duì)混凝土的運(yùn)輸時(shí)間或間距。第二種方法從某種意義上而言，小型混凝土攪拌車基礎(chǔ)取代了攪拌站的功效，為使用人既節(jié)約了機(jī)器設(shè)備項(xiàng)目投資，又提升了生產(chǎn)效率?？墒?，在混凝土粘結(jié)性，勻稱等品質(zhì)上存有著難題，不象攪拌站生產(chǎn)制造的混凝土那般好。因此，為確保混凝土的品質(zhì)，考慮當(dāng)代基本建設(shè)工程施工的規(guī)定，第一種工作方式變成了現(xiàn)階段小型混凝土攪拌車的優(yōu)選工作方式。
Compared with the two methods, the former one can increase the transportation time or spacing of concrete. In the second method, in a sense, the small concrete mixer truck foundation replaces the mixing station, which not only saves the investment of machinery and equipment projects, but also improves the production efficiency. However, there are some problems in the quality of concrete such as cohesiveness and symmetry, which is not as good as the concrete produced by mixing plant. Therefore, in order to ensure the quality of concrete, considering the provisions of contemporary capital construction engineering construction, the first working mode has become the preferred working mode of small-scale concrete mixer at this stage.
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