Concrete mixer related introduction

●   Concrete mixer truck

Special trucks used to transport concrete for construction; due to its shape, it is also often referred to as a snail. This type of truck is equipped with a cylindrical mixer drum to carry the mixed concrete. The mixer drum will always be rotated during transport to ensure that the concrete carried does not freeze. After the concrete has been transported, the inside of the mixing drum is usually rinsed with water to prevent the hardened concrete from occupying space, and the capacity of the mixing drum is reduced.

  The concrete mixer consists of a car chassis, a mixing drum, a transmission system, and a water supply device. Due to technical bottlenecks, all the four major domestic mixer trucks are imported components.

Mixer truck consists of: Class II chassis, drive train, hydraulic system, frame, mixing tank, inlet and outlet device, water supply system, operating system, and ladder. The front end of the mixing tank is coupled with the speed reducer and installed at the front desk of the rack, and the rear end is supported by the two supporting wheels installed on the background of the rack through the raceway.

structure

The concrete mixer truck is composed of a special chassis for the vehicle chassis and concrete mixing and transportation.

The chassis of the concrete mixer truck produced in China uses the second type of universal chassis provided by the vehicle manufacturer. Its specialized agencies mainly include power take-off devices, front and rear brackets for mixing drums, speed reducers, hydraulic systems, mixing drums, operating mechanisms, and cleaning systems. The working principle is that the power of the chassis of the vehicle is taken out through the power take-off device, and the variable pump of the hydraulic system is driven, the mechanical energy is converted into hydraulic energy and transmitted to the quantitative motor, the motor then drives the speed reducer, and the speed reducer drives the stirring device to perform the concrete Stir.


● Concrete mixer maintenance

Clean concrete tank (mixer) and inlet and outlet

Because the concrete will solidify into a hard block in a short time, and it is corrosive to the steel and paint, after every use of the concrete tank, the concrete adhered to the concrete tank and the inlet and outlet must be cleaned daily. Serious work.

These include:

a. Rinse the feed inlet with water before each charge to keep the feed inlet wet while charging;

b. Fill the cleaning water tank that comes with the vehicle while loading;

c. Rinse the feed inlet after filling and clean the remaining concrete near the feed inlet.

d. After unloading at the construction site, rinse the discharge chute and add 30 to 40L of cleaning water to the concrete storage tank to keep the concrete tank rotating at a slow speed during the return journey;

e. Remember to drain the concrete tank before loading the next time;

f. Thoroughly clean the concrete tanks and the inlet and outlet ports around the end of the day to ensure that cement and concrete are not stuck.

If these tasks are not carried out carefully once, they will cause great trouble for future work.

Maintenance drive

The function of the drive device is to drive the rotation of the concrete tank. It consists of a power take-off device, a cardan shaft, a hydraulic pump, a hydraulic motor, a control valve, a hydraulic oil tank and a cooling device. If this part is stopped due to a malfunction, the concrete tank will not be able to turn, which will lead to the scrapping of the concrete in the car, and even cause the concrete of the whole tank to condense in the tank, causing the concrete mixer truck to be scrapped. Therefore, whether the driving device is reliable is a problem that must be highly regarded in use.

●   Concrete mixer use matters needing attention
1. The pressure of the hydraulic system shall comply with the provisions in the instruction manual and shall not be arbitrarily adjusted. The oil quality and quantity of hydraulic oil should meet the original requirements.
2. Before the concrete mixer is loaded, the remaining water and debris in the mixing container should be drained. During the transportation, it should be kept turning to prevent the concrete from segregating. Before the concrete mixer truck arrives at the site and unloads, it should first make the mixing drum rotate at 14-18 rpm for 1-2 minutes, and then reverse unloading. Before reversing, the mixer should be stopped without turning.
3. The ambient temperature is higher than +25 degrees Celsius. The duration of time from loading, transporting, and unloading shall not exceed 60 minutes. The ambient temperature shall be less than +25 degrees Celsius. The above time shall not exceed 90 minutes.
4. During winter construction, it should be ensured that: Check whether ice is formed before starting the machine; Carefully exclude residual water in the mixing bowl and the water supply system, turn off the water pump switch, and place the control handle in the “stop” position.

5. After the unloading at the construction site is completed, the hoppers, hoppers, unloading chutes, etc., shall be flushed with the hose provided with the mixer immediately to remove the sludge and concrete adhering to the vehicle body. On the way back to the mixing station, 150-200L of water should be injected into the mixing drum to clean the concrete residue on the wall and the blades.

6. After the end of each day's work, the driver shall be responsible for injecting fresh water into the mixing drum and rotating it at a high speed (14-18 rpm) for 5-10 minutes, and then drain the water to ensure that the drum is clean. When using high-pressure water to clean all parts of the mixer, care should be taken to avoid parts such as instruments and joysticks. The distance between the pressure water nozzle and the body paint surface must not be less than 40 cm.
7. When clearing the inside and outside of the mixing drum and the residual concrete slag pieces, and when the mechanics enter the drum for inspection and welding repair work, the vehicle engine must be shut down to stop the mixer drum completely from turning. During the work of the mechanics entering the cylinder, it must be ensured that the inside of the mixing cylinder is well ventilated, the air is fresh, there is no natural gas and no harmful dust, and the oxygen supply is sufficient (no pure oxygen must be used). The operator must have good insulation protection when operating in the barrel using a power tool.
8. When working, do not put your hand into the rotating mixing drum. Never stick your hand into the main discharge chute and lengthen the connecting part of the discharge chute to avoid accidents.
9. Check the wear condition of the mixing blades regularly and repair and renew them in time.

10. Implement all relevant safety practices. Concrete mixer truck drivers must undergo professional training.

● Concrete mixer system description

Mixing drum: The model of the mixer drum used in this model is a common application. The mixing drum adopts a pear-shaped structure. The washing water and the mixing water added during the transportation process are added into the head of the mixing drum. Feed into the barrel at the mouth.

Drive system: The drive mode of the mixer cylinder is the engine as the power source. The power is taken from the power takeoff device at the rear end of the engine. It is transmitted to the variable displacement piston pump through the transmission shaft, and the fixed piston oil motor then drives through the reducer. The barrel rotates.
The feeding and discharging system of the mixer (loading and unloading mechanism): It is an important device to assist the work of the mixing drum.
Control system: It is the control part of the whole mixer truck. The control panel has an “I-shaped” groove, which is the activity space of the joystick; and the limit slot of the rear half slot is used to fix the position of the joystick. The control system controls the forward, reverse, and rotation speeds of the mixer through the two left and right joysticks on the rear of the vehicle to complete the infeed and discharge operations and the stirring action.

Water supply system: The water supply system of the concrete mixer truck is mainly used to clean the mixing device. There are two types of water supply system for this model, one is the centrifugal pump water supply system; the other is the pressure tank water supply system, which is available for users to choose.

Telephone 15672996222 QQ 1741947322

Toyota Interior Parts-Hilux

Toyota Interior Parts-Hilux,Custom Car Interior Kits,Used Truck Body Parts,Auto Body Replacement Panels

Changzhou Saina Automobile Industry Co., Ltd , https://www.jsczsaina.com