mixing station equipment operating regulations

Concrete Mixing Truck should be installed smoothly, there is zero protection grounding, maintenance personnel into the mixing tube, cut off the power lock switch boxes, hand care; hopper mix in the hopper rises, no one working under the hopper and walking, concrete batching plant pit when the hopper chain hanging
buckle securely; hopper insurance-linked using normal; transmission parts are shielded solid operating platform.

mixing station construction provides temporary power

(1) temporary power shall prepare construction design temporary power to determine the power line, the total distribution box, distribution box location and orientation of the line for load calculation, select transformer capacity and wire cross-section, the development of safe use of electricity Technical measures and electrical fire prevention measures. By the relevant departments of audit and technical director for approval and implementation. (2) distribution room (chamber), transformers and other electrical equipment located fixed barriers or safety mesh fence, Screw Conveyor not less than 2.5m, should set clear prohibition, warning signs, signs of the production and installation should follow the "Railway safe and civilized construction project site sign "- Iron ban 5, Tiejing 1 and 16 requirements. (4) should be consistent with the existing
temporary power "construction site temporary electrical safety technical specifications" (JGJ46) requirements. Project dedicated power neutral point directly grounded 220/380V low voltage electrical systems must be used to protect access to zero TN-S system, and to do three power distribution protection
and two "one machine, one box a gate-drain." (5) Power operating personnel must be certified, according to the provisions worn properly, the use of labor protection products. (6) multi-channel distribution distribution box should be marked, distribution box should gates, locks, a water-resistant measures, steel switch box must be grounded. concrete block making machine must be complete, no damage, good performance. You must use the installation
With an electric shock protector outlet. Shock protection should be periodically tested to ensure reliable performance. Do not use copper wire, iron wire and other metal instead of fuses. Prohibited in a switch to connect multiple electrical devices.
(7) nighttime construction, mixing station shall be provided within the district to meet the safety requirements for lighting.

Changing the hydraulic oil into the oil channels

Piston end of the cylinder chamber communicates end chamber of the piston into the oil chamber, into the oil chamber as the larger, the oil supply is constant, will lead to slow piston speed, stroke frequency is reduced, thus reducing the displacement of the concrete. However, since the cross-sectional area into the oil chamber and the concrete pump cylinder Screw Conveyor area ratio increases, so concrete pumping pressure increased, ie Figure 3-14 piping connections, enabling small displacement high pressure pump.Modern piston concrete pump, in order to meet the needs, concrete mixing machine a high and low voltage conversion function. Its conversion, usually hydraulic drive change, that is to change the hydraulic oil supply means to achieve high or low pressure pumping.

Unit of time the volume of concrete transport

The calculation methods are mainly the following three: a. Energy conservation principles calculations mentioned in the given concrete pump power, the amount of concrete and concrete pumping pressure is the product of a certain value
Cement silo, necessarily much higher than the actual throughput of concrete. b. according to concrete delivery cylinder volume and piston velocity calculation conveying capacity can also be used concrete pump piston cylinder volume and calculated as the product. c. according to the amount of concrete hydraulic oil can also be calculated according to the following formula to calculate the hydraulic oil. d. concrete pump discharge amount of fuel, the engine power relations conveying capacity and engine power, concrete batching plant. concrete cylinder diameter, piston speed is proportional. Conveying capacity and pumping distance, pumping pressure is inversely proportional to the hydraulic cylinder diameter, etc.

Concrete pump trapped with constant power regulation

It is a measure of the ability of a concrete pumping integrated indicators, but also concrete pump main basis for classification.
① same power different concrete pump, its pumping capacity index identical; ② in concrete pumping pressure is constant, the amount of concrete surface increases with the increase of power; ③ In the dynamic power is fixed, with the pressure pumping concrete increases, the amount of concrete mixing machine, and vice versa.Concrete Mixing Truck trapped with constant power regulation, so concrete pump working pressure of the outlet end of pumping concrete and concrete product of the actual maximum throughput is a certain value, this value is called the pumping capacity index, denoted by M.

Pumping concrete traits

Delivery pressure (transport distance) relationship shown in Figure 3-12. When the displacement increases, the output of the pressure drop, but also reduced the distance is output; Conversely, if the displacement is reduced, the delivery pressure increases, the transmission steel cement silo. In construction machinery, most mechanical properties can be from the production plant to provide product samples or technical specifications and other data found, they are listed in performance, mostly in line with the actual use. Wheel Loader  concrete pump, production performance provided by the Antiquities China, mostly theoretical value or maximum value, a larger difference compared with the actual use of the reason, as the actual performance with its pumped medium, pumping concrete traits, use of the environment, equipment, pipeline installation and layout and the use of manipulation associated with it.

Concrete used large displacement pump

Generally used in the pump pressure of the concrete 9 ~ 13MPa, large displacement of the pump up to 15 ~ 22MPa, pushing the piston hydraulic system pressure is generally rated pressure of 1/3. Concrete mixer delivery pressure pushes the piston depends on the ability and the total resistance of the pipeline, the two also determines the size of the pump conveying distance. Ability to push the piston structure itself is determined by the prime mover. General model to determine the pump size can not be changed later. Determined by the total resistance of the pipeline has a lot of factors, such as concrete gradation has been described previously. Under normal concrete mixing machine,  the most influential design of piping, such as the transmission distance of the horizontal or vertical, the number of straight pipe, elbow, conical tubes and hoses. So be careful in the construction designs are arranged.