Chain bucket elevator quality appraisal

chain bucket elevator uses the core principle of continuous chain bucket transportation and drive system collaborative control. By optimizing the hopper layout, chain strength and transmission mechanism design, it can realize continuous vertical transportation of materials with large inclination angle and high load. It is widely used in mining, cement, grain processing and metallurgy industries. In the cement production line, it is used to improve the feeding of raw material vertical mills; in the mining field, it meets the block material transportation needs of the ore crushing system; in grain storage, it realizes the efficient operation of bulk grain warehousing. Compared with traditional conveying equipment, chain bucket elevators have the characteristics of large conveying capacity, strong wear resistance, and high operational stability. They are the core equipment of heavy-duty industrial material conveying systems.

Zhongke Testing is a product quality appraisal service organization registered with the court. It can provide chain bucket elevator quality appraisal services. It has a professional appraisal team and advanced instruments and equipment to provide fair and accurate appraisal results for chain bucket elevator quality appraisal.

With the high-intensity application of chain bucket elevators in the field of heavy industry, quality dispute cases are showing an increasing trend. The focus of judicial disputes is:

1. Disputes over performance indicators: whether the actual conveying volume meets the standard and whether the chain breaking force meets the design value;

2. Material defects: deviations in the alloy composition of the chain plate, hopper resistance The thickness of the grinding layer is uneven;

3. Process problems: The grains in the heat-affected zone of chain link welding are coarse, and the depth of the carburized layer of the reducer gear is insufficient;

4. Contract performance dispute: key components do not match the technical agreement.

chain bucket elevator quality appraisal technical methods mainly include:

1. Appearance inspection: Check whether the appearance, surface coating, connectors, etc. of the equipment meet the standard requirements and whether there are defects and damage.

2. Dimensional inspection: measure the equipment size, gaps and tolerances, and check with the design drawings to ensure that the equipment dimensions comply with specifications.

3. Performance test: Conduct no-load and full-load operation tests on the hoist, measure performance indicators such as lifting speed, conveying volume, and power consumption, and compare with the contract agreement.

4. Safety inspection: Check whether the protective measures of the equipment are complete and effective, such as protective covers, emergency stop buttons, etc., to ensure the safe operation of the equipment.

A cement factory of the applicant signed a "NE500 Bucket Elevator Purchase Contract" with an equipment manufacturer of the respondent, agreeing on a conveying capacity of 600t/h. After being put into operation, the equipment frequently experienced chain breaks, resulting in kiln shutdown losses. The cement plant accused the material of insufficient strength, and the manufacturer argued that it was caused by overloading.

Identification and analysis results:

The quality analysis expert group discussed and comprehensively analyzed the relevant information of the "Chain Bucket Elevator", contract technical agreement, on-site inspection case materials and other data, and made the following quality analysis opinions:

The appraisal conclusion concluded that the manufacturer failed to control the material composition and component configuration according to the technical agreement, and that inherent defects in the equipment were the main cause of the failure.

chain bucket elevator quality appraisal report mainly includes the following content:

1. Client information

2. Appraisal equipment information

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

4. Identification method