Quality Appraisal of Railway Wagon Loading Machine

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railway truck loader takes dynamic material weighing and automatic positioning control as its core principles. By optimizing conveyor belt synchronization, hydraulic leveling system and anti-eccentric load algorithm, it achieves efficient and accurate loading of bulk cargo (coal, ore, etc.). It is widely used in railway freight stations, mining distribution centers, bulk logistics hubs and other fields. In railway freight, it is used for continuous loading operations of entire trucks; in mining scenarios, it meets the rapid loading needs of 10,000-ton trains; in logistics hubs, it ensures damage-proof loading and unloading of multiple categories of goods. Compared with traditional loading equipment, railway truck loaders have the characteristics of high loading efficiency, excellent weighing accuracy, and high degree of automation. They are the core equipment of the modern railway freight system.

Zhongke Testing is a product quality appraisal service organization registered with the court. It can provide quality appraisal services for railway freight car loaders. It has a professional appraisal team and advanced instruments and equipment to provide fair and accurate appraisal results for the quality appraisal of railway freight car loaders.

With the surge in railway freight volume, there has been a significant increase in loader quality dispute cases. The judicial dispute focuses on:

1, performance index dispute: whether the actual loading efficiency meets the standard, and whether the eccentric load rate exceeds the standard;

2, material defects: insufficient tensile strength of the conveyor belt skeleton layer, The wall thickness of the hydraulic cylinder barrel is uneven;

3. Process problems: the welding of the walking track is not fused, and the angle of the laser positioning system drifts;

4. Contract performance dispute: the core module does not match the technical agreement.

0 Such cases need to pass dynamic performance testing, material mechanics analysis and control logic verification to clarify the quality responsibility.

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1. On-site investigation and evidence collection

Inspect the scene and collect evidence of accident or loss. Check the appearance of the equipment, record the condition, and take photos to collect evidence.

2. View information

Retrieve the purchase contract, acceptance form, maintenance record and other related information of the equipment. Consult professionals to understand technical standards and industry specifications for equipment.

3. Disassembly and inspection

0Disassemble key components of the equipment, such as booms, grabs, hydraulic systems, etc. Inspect components to check whether there are processing defects, substandard materials, installation errors, etc.

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24. Experimental verification

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4 conducts functional testing, load-carrying capacity testing, safety performance testing, etc. on the equipment according to relevant standards. Verify whether the equipment meets the design requirements and whether there is any risk of failure or malfunction.

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The applicant, a railway logistics group, signed a "Quick Quantitative Loading Machine Purchase Contract" with an equipment manufacturer, the respondent, agreeing that the eccentric load rate should be ≤1%. During use, freight trucks frequently appear to be overloaded (actually measured ≥3%), resulting in fines from the railway department. The manufacturer argued that it was due to operator failure to calibrate.

Identification analysis results:

The quality analysis expert group discussed and comprehensively analyzed the relevant information, contract technical agreements, on-site inspection case materials and other data on the "Railway Wagon Loading Machine" and made the following quality analysis opinions:

The temperature drift coefficient of the weighing sensor of the equipment involved in the case exceeded the standard (0.05%/℃>agreement 0.02%/℃), resulting in a low-temperature weighing error of 1.8%; the response delay of the conveyor belt correction mechanism was >500ms (standard ≤200ms); the unfused length of the track joint weld accounted for 15%, causing the truck to vibrate.

The appraisal conclusion determined that performance defects in the core module of the equipment and process control were the main causes of the unbalanced load.

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Railway freight car loading machine quality appraisal report mainly includes the following contents:

1. Client information

2. Appraisal equipment information

3. Appraisal basis (standards, power of attorney, etc.)

4. Identification method

05. Identification results (including appearance inspection, performance testing, disassembly inspection, material analysis, etc.)

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26. Identification conclusion

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