How to buy concrete pump

In recent years, the state has increased investment in infrastructure construction. Concrete machinery market has also been rapid development, including concrete pump in the booming construction market plays an important role in the domestic full hydraulic reciprocating piston concrete pump experienced from scratch, from weak to strong development process. With the market warming, concrete pump manufacturers continue to emerge, different manufacturers, models of concrete pump products more and more. In the face of another dazzling concrete pump market, how should users identify their performance? From what aspect to cut in order to buy a cost-effective brand of concrete pump it? Starting from the technical parameters, usually, a concrete pump has the following main technical parameters: delivery displacement, outlet pressure, motor power and distribution valve form. In accordance with the new national standards, these main parameters from the concrete pump models can be known. Here to pump concrete pump "HBT60-16-110S" type concrete pump as an example to illustrate its significance. HB - Pinyin abbreviation of concrete pump [that is, the original Hubei Hubei Chutian Hubei Pinyin acronym abbreviation, two kinds of explanations] T - Drag S - dispensing valve for the S-shaped tube valve 60 - the maximum delivery , M3 / h 16 ---- maximum pressure of concrete pump outlet, MPa 110 - motor power, kW According to the marked outlet pressure level, divided into low pressure pump (≤ 5MPa), medium pressure pump (6-10MPa ) And high-pressure pump (> 10MPa); According to the maximum throughput per hour, there are 20-100m3 range, and most concrete pump can achieve two variable displacement or variable. The user should select the outlet pressure according to the actual needs of the project according to the height of the conveying distance. Select the range of the output side volume according to the ability of mixing feeding. Select the form of distribution valve according to the aggregates of pumping concrete. S-tube valve in the pump during the loss of pressure loss, smooth flow of concrete, but by the diameter restrictions, the higher the aggregate, suitable for medium and high pressure pump for high-rise buildings and concrete of higher quality Long distance, high-lift delivery; gate valve because of the low aggregate requirements to 'eat coarse grains' is known, medium pressure pump more applied, pumping height of 100 meters, the level of 300 meters. The motor power of a concrete pump is a prerequisite for determining the outlet pressure and delivery volume. When the motor power is constant, the increase of pressure will reduce the delivery volume. On the contrary, reducing the outlet pressure will make the delivery volume increase. In order to ensure that the concrete pump has both a larger delivery capacity, but also have a certain outlet pressure and the corresponding economic power in the design of concrete pump, most of the constant power piston pump; the constant power value Selected, when the outlet pressure increases, the pump output displacement will be automatically reduced to reach the value corresponding to the power design; if it is necessary to achieve high outlet pressure, but also want to get a large amount of delivery purposes. The only way is to increase the motor power. Therefore, in the new national standard, the concept of capacity index of concrete pump is quoted (measured in MPa · m3 / h); that is, the product of the actual outlet pressure of concrete pump and the actual throughput per hour, the larger this value , The greater its ability index, the greater the power of the motor, thus achieving the purpose of large displacement, high lift. Pump Tiger in the design, but also the use of high and low voltage switching function design to meet different construction requirements, in economic conditions, but also produce a larger capacity, or with the same motor power, resulting in a higher export pressure. In the United, pump Tiger HBT60 · 16-110S, for example, when it is at the maximum delivery of 67m3 / h, the outlet pressure of 7.8MPa, low pressure and large displacement to achieve rapid pumping, when switched to the delivery volume of 35m3 / h , The maximum outlet pressure up to 16MPa, high-pressure small displacement can achieve high-lift, long-distance transport. If the outlet pressure of the concrete pump reaches a high pressure level and at the same time has a great throughput, this can not be achieved at the same time if the motor power is insufficient. See concrete pump configuration components, hydraulic pump --- hydraulic pump concrete pump is the "heart", according to the origin of different domestic hydraulic pump and imported hydraulic pump points; according to the structure of the hydraulic pump gear pump, vane pump , Plunger pump points. Different types of hydraulic pumps are suitable for different pressure levels. Due to low cost and adaptability, gear pump is widely used in concrete pump outside Wuhan and Changsha in the initial stage. However, due to its low bearing pressure and large impulse resistance, gear pump is usually used in low pressure pump or only in medium, High-pressure pump auxiliary oil system; piston pump is divided into inclined plate and inclined shaft, because of its adaptable pressure range, reliable performance. Imported hydraulic pumps, such as the German Rexroth A4VG, A10VG, A11VG series of products for world-class products. Domestic oblique axis piston pump to Guiyang, represented by the source of hydraulic A7V, A8V series of products is the quality of domestic piston pump, the quality is relatively reliable. Therefore, from the use of hydraulic pump grade, you can peep a concrete pump performance of the whole machine. Hydraulic Valve --- Hydraulic valve is the "assistant" of the hydraulic pump, including sequence valve, pressure reducing valve, reversing valve, unloading valve, check valve and switching valve. Domestic valve, unloading valve to Shanghai Lixin, Beijing Huade products better, but in sequence valves, valves and other technical difficulties, high reliability valves on the choice of Germany Hawe, Rexroth , The United States and other world famous Vickers brand is better, so that concrete pump performance can be a reliable guarantee. If a hydraulic valve fails, it will affect the work of the whole machine; so buy concrete pump, not only depends on the "heart", but also depends on its "assistant" to achieve the best configuration. Electrical components --- Concrete pump on the electrical components are contactors, circuit breakers, relays, etc., which according to the logic program control the work of related components. Domestic electrical components although the price advantage, but the reliability and life-span and the quality of imported or joint brand components is still a gap. Such as the French Schneider contactor, Germany's Siemens circuit breakers, Japan's small Omron relay, are the best in its class. In order to reduce the number of electrical contacts and more failures, some regular manufacturers have PLC (programmable logic controller) applied to the concrete pump, so that the electrical system to reduce mechanical contacts to a minimum. PLC applications, to achieve a non-contact program control, but also to facilitate the realization of automated remote control, microcomputer fault detection program written to show the cause of the malfunction, to facilitate the operation and maintenance of the system. Comprehensive analysis of brands and services, in addition to concrete pump configuration from the "hardware" choice, but also to analyze its "software" level: such as the brand's production history, research and development capabilities, service capabilities and so on. Formal enterprises in the research and development, quality assurance, after-sales service and spare parts supply, have a better performance, allowing users to worry-free. Buying concrete pump, not only to choose the brand, the election performance, the level of election components, but also depends on the technical strength of manufacturing enterprises, production history, but also depends on the level of its after-sales service and product cost. However, the birthplace of concrete pump in Wuhan, has a strong R & D, production chain and technical services to protect the same time, Wuhan, Changsha and other regular manufacturers is also the standard for domestic pump makers should be the first choice for buyers.