How to deal with common faults of laser leveling machine

Control the pouring speed: Since the concrete has a large slump and good fluidity, the pouring speed should not be too fast to prevent the concrete from flowing and accumulating quickly in the formwork, resulting in loose vibration or segregation. Avoid excessive height difference: The free fall height of concrete should be controlled within 2m. If it exceeds this height, auxiliary tools such as string tubes and chutes should be used to prevent the concrete from segregating due to large drop and affecting the overall performance of the pavement. Reasonable selection of vibration equipment: It is advisable to use a low-frequency vibrator, and the vibration frequency is generally 2000-3000 times/minute. Avoid using a high-frequency vibrator to cause over-vibration of the concrete, which will cause the aggregate to sink, the cement slurry to float, and the stratification and segregation. Control vibration time: The vibration time should not be too long. The surface of the concrete no longer sinks significantly, bubbles no longer appear, and cement slurry appears on the surface. Generally, the vibration time at each point is controlled within 20-30 seconds. Timely surface finishing: Since the surface of concrete with large slump has more moisture, it is necessary to wait for the surface moisture to evaporate properly before finishing. Generally, it is 1-2 hours after the concrete pouring is completed. The specific time needs to be determined according to the site environment and the concrete setting conditions. Too early surface finishing will cause surface marks or unevenness, and too late will affect the surface finishing effect. Multiple surface finishing: Usually 2-3 surface finishings are required. The first surface finishing is carried out after the concrete surface is initially dehydrated, mainly for rough leveling; the second surface finishing is carried out before the initial setting of the concrete, further slurry lifting and smoothing; the third surface finishing is carried out before the final setting of the concrete, mainly to eliminate fine surface cracks and defects, making the road surface smoother and flatter. Timely covering: After the concrete surface is finished, it should be covered with plastic film, geotextile, etc. immediately to prevent the surface from drying out and cracking due to rapid evaporation of water. The covering should be tight to ensure that the concrete surface is always moist. Extended curing time: The strength of concrete with large slump increases relatively slowly. The curing time should be appropriately extended, generally not less than 14 days. During the curing period, water should be sprinkled regularly to keep the covering moist, so that the concrete can harden under suitable humidity conditions and improve the strength and durability of the road surface.  

Failure prevention and treatment methods of concrete laser leveling machine As a key equipment in modern building construction, the concrete laser leveling machine has significantly improved construction quality and efficiency due to its high efficiency and accuracy. However, any equipment will inevitably malfunction during long-term use. This article will focus on the failure prevention and treatment methods of concrete laser leveling machines, with a view to providing practical guidance for equipment operators and maintenance personnel. ☆ Common fault types and causes of concrete laser leveling machines ♢Hydraulic system failure: The hydraulic system in the concrete laser leveling machine is the core part of its work. Common failures include hydraulic oil leakage, excessive oil temperature, loud oil pump noise, etc. These failures are often caused by aging seals, oil contamination, or improper system pressure settings. ♢Electrical system failure: The electrical system controls various functions of the leveler. Common failures include sensor failure, motor failure, controller failure, etc. These failures may be caused by environmental factors (such as high temperature, humidity), circuit aging or quality problems of electrical components. ♢Laser control system failure: The laser control system is the soul of the concrete laser leveling machine and accurately controls the leveling process. Common faults include unstable laser receiver signals, laser transmitter failures, etc. These failures can be caused by dust buildup on the laser, damaged optics, or improper system calibration. ♢Mechanical structural failure: Mechanical structural failure usually manifests as leveling knife wear, track damage, bearing failure, etc. These failures are mainly caused by long-term wear and tear, overload use or lack of regular maintenance. ☆ Concrete laser leveling machine failure prevention measures ♢Regular inspection and maintenance: Regularly conduct comprehensive inspections of the concrete laser leveling, including the hydraulic system, electrical system, laser control system and mechanical structure. Replace aging parts, replace and clean the oil to ensure the normal operation of the equipment. ♢Correct use and operation: Operators should be familiar with the operating procedures and precautions of the equipment to avoid illegal operations. During use, attention should be paid to observing the operating status of the equipment, and abnormal situations should be discovered and handled in a timely manner. ♢Environmental factor control: Optimize the working environment of the equipment to avoid the impact of high temperature, humidity and other harsh environments on the equipment. At the same time, keep the area around the equipment clean to prevent debris and dust from entering the inside of the equipment. ♢Training and education: Regularly train and educate operators to improve their understanding of equipment structure and performance, and enhance their ability to judge and handle equipment failures. ☆ Concrete laser leveling machine troubleshooting methods ♢Hydraulic system fault handling: For hydraulic system faults, you should first check whether the hydraulic oil is clean and whether the seals are aging, etc. If there is any problem, the seals should be replaced in time, the oil tank should be cleaned and new oil should be replaced. Also, check that the system pressure is set correctly and adjust if necessary. ♢Electrical system fault handling: When handling electrical system faults, you should first check whether the power supply is normal and whether the circuit is aging, etc. For problems such as sensor failure and motor failure, damaged electrical components should be replaced in time. At the same time, the controller should be calibrated and maintained regularly to ensure its normal operation. ♢Laser control system fault handling: For laser control system faults, you should first check whether the laser receiver is stable and whether the optical components are damaged, etc. If necessary, the laser can be cleaned, optics replaced, or the system recalibrated. ♢Mechanical structure failure handling: For mechanical structure failures, the wear and tear of wearing parts such as leveling knives and crawler tracks should be regularly checked and replaced in a timely manner. For failures of key components such as bearings, a comprehensive inspection should be carried out and corresponding measures should be taken to deal with them. ☆ Actual case analysis Take the laser control system failure of a concrete laser leveling machine at a construction site as an example. During use, the operator found that the leveling effect was unstable, and upon inspection it was found that the laser receiver signal was unstable. After a comprehensive inspection of the laser system, it was found that dust accumulated on the surface of the laser transmitter, causing signal transmission to be blocked. After cleaning the laser emitter and recalibrating the system, the problem was resolved and the leveling effect returned to normal. ☆ Conclusion and outlook Failure prevention and treatment of concrete laser leveling machines are of great significance to the long-term stable operation of the equipment. Equipment failures can be effectively prevented through regular inspection and maintenance, correct use and operation, environmental factor control, and training and education. At the same time, appropriate handling methods are adopted for different types of faults, which can quickly solve the fault and restore the normal operation of the equipment. Looking to the future, with the advancement of technology and the continuous upgrading of equipment, the failure prevention and treatment methods of concrete laser levelings will also continue to be improved. Equipment manufacturers should continue to improve the reliability and stability of equipment and reduce the probability of failure. At the same time, construction units and operators should also strengthen their ability to prevent and deal with equipment failures to ensure efficient and stable operation of equipment during the construction process. Through joint efforts, we can further promote the widespread application of concrete laser levelings in construction and contribute to the improvement of project quality and construction efficiency.

  – Material inspection: Make sure that the mix ratio of concrete meets the construction requirements. For laser leveling machine construction, the slump of concrete is generally recommended to be between 12 and 18 cm, so that the concrete has good fluidity and is convenient for the leveling machine to operate. For example, in the construction of large factory floors, the slump of concrete should be tested in advance to avoid affecting the leveling effect due to inappropriate slump. – Base treatment: The ground base needs to be solid and flat. If there are uneven areas on the base, the thickness of the concrete will be uneven, affecting the final flatness of the ground. Therefore, before construction, the base should be cleaned and repaired, debris, dust, etc. should be removed, and potholes should be filled.   – Vibration link: After the concrete is laid, before using the laser leveling machine, you can use a vibrating rod for preliminary vibration to make the concrete more compact. But pay attention to the vibration time and depth to avoid excessive vibration causing concrete segregation. During the vibration process, it should be coordinated with the construction sequence of the laser leveling machine. Generally, the leveling operation should be carried out as soon as possible after vibration. – Leveling operation: When the laser leveling machine is used for concrete floor construction, the parameters of the equipment should be adjusted according to the design elevation and slope requirements of the ground. During the construction process, the walking speed of the machine should be uniform, avoiding too fast or too slow. Too fast speed may cause insufficient flatness of the ground, and too slow speed will affect the construction efficiency. At the same time, pay attention to the height and angle of the scraper to ensure that the concrete surface is flat and smooth.   – Moisturizing maintenance: After the concrete is leveled, moisturizing maintenance should be carried out in time. Plastic film, straw mats, etc. can be covered on the surface to prevent the concrete from cracking due to excessive evaporation of water. The maintenance time is generally not less than 7 days. In hot weather or dry environment, the maintenance time should be appropriately extended. – Temperature control: The temperature of asphalt material is crucial to the construction quality. During construction, the temperature of hot-mix asphalt mixture should meet the requirements of construction specifications. Generally, the exit temperature of ordinary asphalt mixture is between 140 and 165℃. If the temperature is too low, the asphalt mixture will become viscous, which is not conducive to the construction of the leveling machine; if the temperature is too high, it will accelerate the aging of asphalt. – Base treatment: Similar to concrete floors, the base of asphalt floors also needs to be solid and flat. At the same time, the base must be kept dry, because if there is moisture in the base, after the asphalt is paved, the evaporation of moisture will cause hollowing and cracking problems in the asphalt pavement.   – Paving uniformity: During the asphalt paving process, the asphalt mixture must be spread evenly. When the laser leveling machine is in operation, pay attention to controlling the pressure of the scraper to avoid excessive pressure that causes excessive extrusion of the asphalt mixture, affecting its density and surface flatness. – Joint treatment: In asphalt floor construction, joint treatment is a key link. When using a laser leveling machine for multi-width paving, the longitudinal joints between the two widths must be handled well. Generally, the hot joint method can be used, that is, a certain width (generally 10-20cm) of the first paved asphalt mixture is left unrolled for the time being, as the reference surface for the later paving part, and then the joint is leveled with a leveler so that the two asphalt pavements can be well connected.   – Compactness inspection: After the asphalt floor construction is completed, the compaction of the ground should be checked. Nuclear density meters and other equipment can be used for testing to ensure that the compaction meets the design requirements. If the compaction is not enough, the asphalt floor will cause rutting and other diseases during use. – Stone selection and processing: Select stones with uniform size specifications and good flatness. Before paving, the back of the stone should be cleaned to remove dust, impurities, etc., and appropriate back coating can be performed to enhance the bonding between the stone and the base. – Base preparation: The base needs to have sufficient strength and stability, and cement mortar is generally used as the base material. The flatness error of the base layer should be controlled within a small range to provide a good foundation for stone laying.   – Laying accuracy: When using a laser leveler to assist in laying stones, the laying height and levelness of the stones should be accurately controlled. Since the stone itself is heavy, the leveler should be careful to avoid collision with the stone during operation to prevent the stone from breaking or shifting. For large-sized stones, multiple people may be required to cooperate in the construction and use the leveler for fine-tuning. – Use of bonding materials: When laying stones, the bonding materials (such as cement mortar or special stone glue) should be applied evenly and the thickness should be moderate. The laser leveler can be used to check the flatness of the stone after laying. For uneven stones, adjustments can be made before the bonding materials solidify.   – Cleaning and protection: After the construction is completed, the stains and bonding material residues on the stone surface should be cleaned in time. And the stone surface can be protected, such as applying protective agents, to prevent the stone from being polluted and eroded, and extend the service life of the stone floor.