In the field of infrastructure construction, the wet concrete spraying trolley is an important construction equipment, and its efficiency and stability are crucial to ensuring the quality and progress of the project. In order to ensure that the wet concrete spraying trolley is always in the best operating state, regular comprehensive and detailed inspections are essential. This article will introduce in detail the main inspection items that should be carried out when the wet concrete spraying trolley is shut down to help operators and maintenance teams to find and solve problems in time, extend the service life of the equipment, and improve work efficiency.

　　1. Core performance evaluation

　　The first task is to check the core performance of the wet concrete spraying machine to confirm whether the parameters meet the rated indicators provided by the manufacturer. This includes but is not limited to key data such as pumping pressure, injection speed, and nozzle discharge uniformity. By comparing the actual test results with the standard values, it is possible to quickly identify whether there is performance degradation or potential failure.

　　2. Metal structure integrity inspection

　　The integrity of the metal structure is the basis for ensuring the safe operation of the wet concrete spraying trolley. Carefully check whether there are any open welds, cracks, deformations, and severe rust. These damages not only affect the appearance, but more importantly, they may weaken the mechanical strength and increase the risk of accidents. Once a problem is found, reinforcement measures should be taken in time or damaged parts should be replaced.

　　3. Inspection of working devices and accessories

　　Perform comprehensive functional tests on the working devices of the concrete wet spraying machine, such as boom telescopic and rotating mechanisms, to ensure that they can operate stably and smoothly. At the same time, check whether all accessories (such as spray guns and hoses) are complete and intact, and whether the bolts of each connection are tightened in place. Any negligence of any detail may lead to a significant reduction in overall performance.

　　4. Appearance cleanliness and leakage detection

　　Keeping the surface of the equipment clean is not only a basic maintenance requirement, but also an effective means to prevent premature wear of internal components. During the inspection, pay attention to whether there is leakage of oil, gas or water. Any type of leakage will reduce equipment efficiency and even cause environmental pollution and safety hazards.

　　5. Health status of electrical system

　　For concrete wet spraying trolleys equipped with motor drive, attention must be paid to the health status of their electrical systems. Pay special attention to whether the contact between the carbon brush and the slip ring of the motor is tight, whether abnormal sounds are generated during operation, and whether there is leakage. In addition, the insulation resistance value is measured and recorded regularly to ensure that it meets the technical specifications in the manual to avoid safety accidents caused by electrical problems.

　　The shutdown inspection of the concrete wet spraying trolley is a systematic work, covering multiple levels from performance testing to appearance maintenance. Only when every link is taken seriously can the long-term stable operation of the equipment be truly achieved. By implementing the above inspection items one by one, not only can the safety level of the work site be improved, but also the unplanned downtime can be effectively reduced, bringing significant economic and social benefits to the entire construction project.