Curtain wall machinery and equipment quality appraisal

curtain wall mechanical equipment is based on the core principles of high-precision installation and structural safety coordination. By optimizing positioning accuracy, load-bearing capacity and wind pressure resistance, it can achieve rapid installation of curtain wall unit panels, joint sealing and seismic performance. It is widely used in the field of curtain wall construction of high-rise buildings, commercial complexes and transportation hubs. In super-high-rise construction, it is used for precise mid-air docking of unit curtain walls; in special-shaped curved curtain walls, it meets the flexible adjustment needs of hyperbolic glass; in the renovation of existing buildings, it ensures the adaptability of the old structure's bearing capacity. Compared with traditional construction equipment, curtain wall machinery and equipment have the characteristics of intelligent control, modular design and safety redundancy, and are the core equipment for efficient construction of curtain wall projects.

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

As the complexity of curtain wall projects increases, related quality dispute cases have increased significantly. The judicial dispute focuses on:

1, performance index dispute: installation accuracy exceeds standard, wind pressure resistance test fails;

2, material defects: insufficient breaking force of load-bearing steel cable, thickness of guide rail wear-resistant coating;

3, process problems: hydraulic system pressure fluctuations, positioning sensor response delays;

4, contract performance disputes: core modules (such as imported servo motors, three-dimensional scanning systems) are inconsistent with the technical agreement.

curtain wall mechanical equipment quality appraisal technical methods mainly include:

1, instrument detection method

using various professional testing instruments to measure and analyze various performance indicators of the equipment. For example, a laser range finder is used to measure the installation accuracy of the curtain wall, and a multimeter is used to detect the voltage, current and other parameters of the electrical system. Through instrumental testing, accurate data can be obtained to provide scientific basis for identification.

2, simulation test method

For some complex quality problems, simulation tests may be required. For example, simulate the operation of the equipment under different working conditions and observe the performance changes of the equipment to determine the cause of the problem. Simulation tests can more truly reflect the actual operation of equipment and help accurately determine quality problems.

A construction group of the applicant signed a "Unit Curtain Wall Installation Machine Purchase Contract" with an equipment manufacturer of the respondent, agreeing that the installation accuracy is ±1mm. During the construction, the joints of the curtain wall were misaligned by up to 4mm. The manufacturer argued that this was caused by the measurement reference error.

Identification analysis results:

The quality analysis expert group discussed and comprehensively analyzed the relevant information of "curtain wall machinery and equipment", contract technical agreements, on-site investigation case materials and other data, and made the following Quality analysis opinion below:

The positioning system laser sensor accuracy of the curtain wall machinery involved in the case is ±2mm (agreed ±0.5mm), and the hydraulic synchronization control deviation is ±15% (agreed ±5%); the breaking force of the load-bearing steel cable is only 85% of the agreed value, and the structural deformation under dynamic load exceeds the limit.

The appraisal conclusion determined that equipment control accuracy and material defects were the main causes of construction failure.

Curtain wall machinery equipment quality appraisal report should include:

1, appraisal purpose (such as construction accident attribution, safety compliance verification) and reference standards;

2, involved equipment model, technical parameters, operation and maintenance records;

3, testing method and equipment list ( Such as laser tracker, wind tunnel test bench);

4, analysis of detection data and failure correlation (such as the impact of positioning error on joint quality);