Let You Know More About The Single Shaft Concrete Mixers
I. Definition and classification
The single-horizontal-shaft concrete mixer is a concrete mixer equipped with a horizontal mixing shaft with spiral ribbon blades or shovels on the shaft for stirring the mixing materials. Its power assist device is usually set in the main transmission system, and the coaxial transmission box is used to change the force state of the mixing drum, thereby reducing the torque required to tip the drum, reducing the load on the mechanism, and reducing energy consumption.
II. Working principle
The working principle of the single-horizontal-shaft mixer is to drive the mixing shaft to rotate in one direction through a reduction motor, and the positive and negative shovels on the mixing shaft mix the materials. This design allows the material to be pushed from one side to the other side in the drum, and then pushed back to the original position from the other side, forming a cyclic action, thereby ensuring that the material is fully mixed and achieves an ideal mixing effect.
III. Structural introduction
The single-horizontal-shaft mixer is mainly composed of a feeding system, a mixing device, a transmission system, a discharging structure, a water supply system, a frame and an electrical system.
IV. Advantages
Good mixing quality: The single-horizontal-shaft mixer has a unique design and a reasonable blade layout, which can fully mix the materials and ensure the mixing quality.
High production efficiency: The mixing speed is fast, and a large amount of materials can be mixed in a short time.
Low energy consumption: The use of advanced energy-saving technology and efficient power system can greatly reduce energy consumption.
Low noise: The machine runs smoothly, does not produce impact and noise, and ensures the quality of concrete.
Reasonable structure: High-strength steel and reliable structural design make the machine more durable.
Convenient operation: It has a simple and easy-to-use operating system, which is easy to master and operate.
Convenient maintenance: The overall disassembly technology is adopted, and the maintenance is very simple, and the maintenance work can be completed in just a few steps.
V. Main technical parameters
JDC350 single-shaft concrete mixer
Feed capacity: 560 liters
Discharge capacity: 350 liters
Theoretical productivity: 17.5m3/h
Hopper lifting speed: 19m/min
Mixing power: 15kw
JDC500 single-shaft concrete mixer
Feed capacity: 800 liters
Discharge capacity: 500 liters
Theoretical productivity: 25-30m3/h
Hopper lifting speed: 19m/min
Mixing power: 18.5kw
VI. Application scenarios
Single-shaft concrete mixers are widely used in construction sites of various sizes, road and bridge construction, cement product factories and large-scale engineering projects. Specific application scenarios include the production of high-quality concrete materials, roadbed and bridge bearing materials, various gray concrete, light-colored concrete and other cement products.
VII. Installation of the whole machine
1. Inspection before installation
Machine unpacking inspection: After unpacking, carefully check whether the reduction motor, barrel, bearing seat and other components are damaged during transportation, and whether the fasteners are loose. If there is any damage or looseness, it should be repaired or tightened in time.
Preparation of supporting foundation: The mixer should be installed on a flat concrete floor to ensure the stability and safety of the equipment.
2. Installation steps
(1) Transportation and fixing:
Use ropes to tie the mixer to the frame for transportation, and avoid tying it to the mixing shaft to prevent damage to the mixing shaft or cause safety accidents.
There are casters installed under the mixer base to facilitate the movement of the mixer. However, after the installation position is determined, the mixer should be fixed to the ground with anchor bolts or other fixing devices to prevent the mixer from moving during operation.
(2) Installation of limit devices:
The mixer barrel limit device usually consists of a locking pin and a positioning hole. During installation, ensure that the limit device can be correctly and firmly fixed to the frame so as to limit the barrel during mixing to prevent excessive rotation of the barrel or accidents.
(3) Connect power and electrical control:
Connect the power cord according to the wiring diagram of the electrical control system, and ensure that the electrical control system can start, jog, stop and time normally.
Before connecting the power supply, check the insulation performance and grounding of the electrical control system to ensure electrical safety.
3. Inspection and debugging after installation
(1) Inspection before starting:
Before starting the mixer, check again whether there is any scraping between the rotating part and the barrel. If there is any scraping, adjust it in time.
Clean up the debris in the barrel to ensure that no impurities are mixed in during the mixing process.
(2) Lubrication and maintenance:
The reducer should be filled with an appropriate amount of engine oil to ensure lubrication and heat dissipation of the reducer.
The unloading worm gear and sliding bearing should also be filled with engine oil to reduce wear and friction.
(3) Debugging and operation:
After starting the mixer, observe whether the rotation direction of the mixing shaft is consistent with the mark on the end face of the barrel. If not, stop the machine immediately and adjust the phase sequence of the power cord.
Adjust the timing of the time relay according to the mixing time. Note that the adjustment must be made when the power is off.
Before loading the concrete material, ensure that metal and other debris have been removed from the material.
Press the start button, the main shaft drives the mixing shovel to rotate, and it stops automatically after the set time is reached.
VIII. Use and Maintenance
1. Unloading and Cleaning:
When unloading, the machine should be stopped and the locking pin should be opened first, then the handle should be moved to rotate the barrel to a certain position, and then the locking pin should be positioned and the main shaft should be rotated to discharge the mixed material out of the barrel.
After the mixed material is discharged, the barrel should be manually reset and positioned with the locking pin.
When cleaning the barrel, water can be poured into the barrel to make the main shaft run for flushing, or it can be cleaned with dry sand.
2. Regular inspection and maintenance:
Regularly check the sealing condition of the machine. If leakage is found, the quality of the sealing gasket should be checked and replaced in time.
Frequently check the tightness of the shovel blade. If it is loose, it should be tightened in time.
Frequently check whether the electrical control system is in good contact and dry. If there is any problem, it should be handled in time.
3. Precautions:
During the mixing process, do not insert your hands and sticks into the barrel to avoid danger.
After long-term use of the mixer, the shovel blade and the mixing barrel will wear and should be adjusted or replaced according to the wear.
IX. Operating procedures and maintenance
1. Operating procedures:
Before starting, check whether the rotating part and the barrel are scraped or not. If there is any scraping, it should be adjusted in time.
The reducer should be filled with engine oil before use, and the unloading worm gear and sliding bearing should also be filled with engine oil.
Clean up the debris in the barrel, lock the barrel limit device, and then start the machine.
The direction of rotation of the mixing shaft is as indicated by the mark on the end face of the barrel.
The loaded concrete material must be free of metal or other debris.
Adjust the timing of the agitator according to the mixing time, and adjust it when the power is off.
Press the start button, the main shaft drives the mixing shovel to run, and it will stop automatically after the set time is reached.
When unloading, stop the machine first, then loosen the handle of the material position limit, and then rotate the handwheel. The worm gear drives the barrel to rotate to a position that is convenient for discharging, stop rotating, and then start the machine to make the main shaft run before discharging the material, until the material is discharged, stop the main shaft, and rotate the handwheel to reset the material barrel.
2. Maintenance:
Maintain the cleanliness of the machine body and remove dirt and obstacles on the machine body.
Check the oil, circuits and control equipment at each lubrication point, and add lubricating oil as required.
Before each shift, add water to the mixing drum and run it idle for 1 to 2 minutes, and check the reliability of the clutch and brake device.
During the operation of the concrete mixer, the noise of the motor, reducer, and transmission gear should be checked at any time to see if it is normal and whether the temperature rise is too high.
After each shift, the concrete mixer should be carefully cleaned.
