Installation steps concrete batching plant

Commissioning of concrete batching plant apparatus after the completion of four main parts: preparation work before commissioning, unit testing, the whole no-load test, load test machine. Well, this four-part specifically how to operate it, Truemax for you to do something specific introduction:

1, before commissioning up job

Before commissioning, first check the following components:

(1) See all some convergence is not securely fastened, in particular in view of the stirring blade stirring the host adapter and the agitator shaft bolt is not tightened, the new machine should be fastened to view it again from scratch.

(2) See all smooth some conditions, to ensure that the smooth point lubricating oil (fat), each gear box and drum motor oil level within the scope of the request.

(3) Check the electrical cabinet and console each connector adapter bobble error-free connection.

After completion of the above view, enter during debugging.

2, unit commissioning

Since the electronic control system interlock between each setting some, unit commissioning is necessary in accordance with the following sequence: Mixes belt conveyor (Discharge Conveyor) → Mixer → raw aggregate belt conveyor (belt feeding machine) → Reap → feed belt scale speed screw conveyor powder screw feeder →  water supply system manifold system. Mechanical system debugging work together to investigate the motors operation direction. If the motor is rotating or turning rules are not the same, the phase inversion method adopted to Story.

3, the whole load test

Unit commissioning all normal, then no-load test, and after the first hand the initiative. In the following order of the boot-load test machine: Compressor → mixture was stirred host belt conveyor → → raw aggregate belt conveyor belt scale →  pellet powder spiral scale → Electronics → speed screw conveyor cement screw conveyor machine → water system.

4, the whole load test

Load test all normal, then load test, and after the first hand the initiative, the first unit test load after load test machine. Make sure the pool water. Cement silo Shanghao material. The best pellet feeding after the launch in the belt scale. Selected cooperation ratio, various formulations set enter the computer. First commissioning of water supply system, conditioning throttle, the pump output flow is slightly larger than the practice of usage. Then debug cement metering system to ensure that the cement screw conveyor achieve active status of start and stop. Final commissioning pellet metering system should pellet hopper Doumen opening rate in the mid-range. Speed ​​motor speed should be more than a job, the speed is too high, the degree of opening of the door to increase the feed speed is too low, the degree of opening the charging door is reduced. 

HOW TO USE CONCRETE PLACING BOOM

Fabric machine is not free to take a long, long time to be received, promised to work in more than the required radius plus set a fixed support.
Change position when the discharge port, with one sack will be exported wrap, avoid concrete fell on the ground, to another location on the material and then unlock.
Ready for concrete placement of signal lines and radio, dual control, in the columns, walls concrete pouring, to ensure that the lamp pump stop, stop Li Ting, foreground pouring point required in advance 4S stopped, put out the lights, communication is necessary based hand carried out at night during the construction, coupled with the necessary control of concrete people flashlight, to see concrete pouring height.
Test, with a large rope control concrete spout, and the lever arm intermediate curved split at its large scope week run.
Take concrete pump tube, when taken over, it is necessary to check whether the full clean the pump tube, the interface is necessary to use a rubber gasket. After concrete pump pipe connector bolts should re-examine the case.
Wind cable rope with cloth lever legs fixed, cable wind rope too tight, should stay out of boom force and deformation interval.
Can not stand when the feed rod placed on the body to use when compacting frame tube legs, mounted on the ground floor.
Mounted boom and counterweight boom intermediate requirements necessary to discharge hit 200 ~ 300mm, the foot support surface or wooden sleepers bedding, check whether the shaft vertical fabric machine.
Erection frame body concrete placing boom placement, and the inspection and acceptance, to calculate the force parts of the frame body capacity, reinforcing the case of stable situation Twill member of the foundation.
Check whether the bolts of cloth machine all tightening, whether normal hinge.
The fabric machine stand straight, see if you can stand straight in the case do not counterweight. (Boom normal circumstances are considered to be in the counterweight can not stand straight, as when lifting boom, common crane boom can not be hung up together with the counterweight, need to be lifted in two installation).
Hydraulic System cloth machine Full description:
(1) climb hydraulic jacking system and the host system share a pumping station, the connection between the two systems using imported high-quality quick connectors, independent, free conversion conditions (cloth / lifting), safe, reliable, and effective system conditions to solve the oil spill problem switching process, to avoid polluting the environment.
(2) The machine adopts the open hydraulic system, the system is simple, reliable, easy to fault diagnosis and troubleshooting.
(3) As used boom balancing valve for the Italian Truemax imported products with secondary overflow characteristics, can effectively ensure the smooth operation of the boom, to avoid influence by external cylinder pressure suddenly increased in the case of damage to the boom, enhanced use safety.
(4) rotating all-hydraulic drive, low speed high torque hydraulic motor planetary reducer, can be used for 480 ° rotation, smooth rotary motion and accurate. For fabric machine characteristics are often in high-altitude operations, the normally-open swing brake, to ensure that fabric machine in the non-working condition, free skating can turn the wind, not because the wind load is too large and damage the drive mechanism and structure. 

Concrete pump truck function analysis

Concrete pump truck, also known by the pressure along the pipeline will be concrete continuous conveyor machinery. By the pump and delivery tube. Form of the structure is divided into piston, squeeze, pressure diaphragm. Pump mounted on the vehicle chassis, and then equip scalable or tortuous boom, on the composition of truck.
Concrete pump is adapted from the truck chassis, which is mounted on the chassis movement and power transmission devices, pumping and mixing device, feeding device and some other auxiliary devices.
Concrete pump power through a power transfer case transfers power from the engine to the hydraulic pump groups or rear axle, hydraulic push the piston driven concrete pump. Then use the boom and pump delivery pipe on the concrete delivery to a certain height and distance.
Concrete pump truck with the engine in addition to drive, but also to drive the pumping mechanism, mixing mechanism and fabrics institutions working device.
Concrete pump power of the working device from car engines.
When concrete pump working, car engine power transmitted through the transmission transfer case, and then after the transfer case switch passed to the hydraulic pumps or chassis bridge.
When the driver is switched to pumping position to issue instructions, pneumatic solenoid valve control box on the transfer cylinder push fork, fork and then push switch to pumping gear isolated position, and cut off power after the bridge to make cars in parking status. Conversely, switch to the driving position.

Reason pumping concrete slump and slump loss instability problems and solutions

1. Causes

(1) concrete admixtures caused by poor compatibility with cement concrete slump loss fast

(2) The content is not enough concrete admixtures, retarding, plastic - not ideal.

(3) the hot weather, some admixture fail at high temperatures; fast evaporation; bubble caused by spills of fresh concrete slump loss quickly.

(4) initial slump of concrete is too small, too little water units.

(5) and mixing station construction site coordination bad, so that the pressure tank car, traffic jam time is too long, leading to concrete slump loss is too great.

(6) concrete mixer weighing system measurement error, instability.

(7) coarse and fine aggregate moisture content changes.

(8) mixed cement storage warehouse, mixed-use.

2. Solutions

(1) The adjustment of concrete admixture formulations adapted it with cement. Before construction, make sure to test the adaptability of cement and concrete admixtures.

(2) The adjustment of concrete mix, increase or decrease the rate of sand, water, concrete adjustment to the initial slump more than 200mm.

(3) adding an appropriate amount of fly ash, instead of part of the cement.

(4) The amount of content to increase concrete admixtures, retarding admixtures adjustment component (especially when temperatures much higher temperatures than usual).

(5) to prevent excessive evaporation, bubble spills too.

(6) use of slag cement or pozzolan cement.

(7) to improve water retention, cooling device concrete truck.

Accuracy (8) metering equipment should meet the relevant requirements, and have a valid certificate issued by the legal metrology department, to strengthen the self-test to ensure accurate measurement.

(9) To strengthen aggregate moisture content testing, when changes, timely adjust the mix.

(10) into the library should cement manufacturers, varieties and labels are stored separately and use.

3. Lessons Learned

Especially for pumping concrete pumping concrete and underwater pile foundation of concrete slump loss problems. By learning experimented summed up a set with the actual situation to solve problems. Additive manufacturers such as communication to improve and adjust admixture retarding ingredients; adjust concrete construction time, avoid high temperatures not under construction; use in road construction roads far away poor situation of secondary feed additives; the use of large Volume Fly Ash Concrete Mix construction machinery. Concrete slump loss of this thorny issue, to give greater ease. No matter what the cause of the slump caused by the smaller unable to pump or can not meet the construction requirements of the situation we can use admixture slump adjusted so as to achieve the desired slump, add water to prevent arbitrary increases Collapse off of bad habits to determine the quality of the concrete from the fundamental!

Cement Mixer Trucks Procedure

First, before starting to deal with the various parts of the mixer mixer various mechanical systems carefully check to make sure only after a good start concrete mixer truck.
Second, before starting concrete mixers, concrete mixer should stir the lever on the “neutral” position.
Third, the mixer start, it should be stirred joystick on the “unloading” position, put the barrel to the stirred water.
Fourth, mixer loading, stirring the operating lever should be placed “charge” position.
Five concrete mixer before shipping, mixer discharge chute must be fixed in the “drive” position, to prevent mixer discharge chute swing does not occur.
Six cement mixer when operating the joystick, should be in the “neutral” position stopover before moving to the next position.
Seven, do a good job of civilization construction, are not allowed to casually Dumping excess material barrel. It must be mixing tube, chute, roller and other parts for cleaning after discharge.
Eight, when people enter the barrel to clear concrete lumps, should turn off the vehicle, disconnect switches keys, cylinder peripheral guardianship. 

Water pipe cleaning method recommended plan of concrete pumps

Before cleaning delivery line, it is best 0.5-1m3 mortar pumping and pumping all after their stop, then flip the switch plate valve, remove the pressure accumulator.

Pipe cleaning, there are two methods, namely washing and gas washing, whether water or air wash, should the valve housing and hopper clean. When washing, it should open the cone and cleaned, then soaked with water and cleaning cement bags tied cylindrical ball has been cleaned the intake cone tube, followed by back taper pipe and tubing, closed Doumen unloading, again hopper filled with water; Concrete pump water until cleaning ball out from the distal end of the delivery tube so far. Washing, requires cutting a gap ring and eye plate should be small, need a lot of water, tightly sealed, so that the cleaning water does not penetrate the ball forward. When washing the end, pay attention to the line in the water, not into the pouring of concrete location via free affecting the quality of the concrete. This method is simple, less dangerous, more commonly used.