Weighing Cabinet With High Precision laboratory equipment, safety cabinet, balance enclosure Jiangsu Xicang Intelligent Technology Co., Ltd. , https://www.xciwarehousing.com
Three forms of deformation joints and setting methods
There are three main types of deformation joints used in construction to accommodate movement caused by external factors like temperature, settlement, and seismic activity. These joints help prevent cracks and structural damage by allowing different parts of a building to move independently. The three types include expansion joints, settlement joints, and seismic joints. Each serves a unique purpose and is designed with specific construction methods.
Expansion joints are primarily used to manage thermal expansion and contraction due to changes in temperature and humidity. They are typically placed vertically at intervals depending on the materials and design of the structure. These joints separate the building into independent sections, allowing each part to expand or contract without affecting the others. This type of joint is also referred to as a temperature joint. The maximum spacing between expansion joints varies based on the building material and environmental conditions. For example, masonry structures usually have a spacing of 100–150 meters, while reinforced concrete structures range from 35–75 meters. In some cases, especially for monolithic reinforced concrete buildings, temporary post-cast joints are used during construction to allow for shrinkage before final sealing.
The construction of expansion joints must account for horizontal movement. On exterior walls, the gaps are filled with elastic, waterproof materials such as asphalt hemp, neoprene, or foam, and covered with galvanized metal or plastic sheets. Interior wall joints can be concealed with wooden or plastic panels, while floor joints may use movable covers or rubber strips to prevent dust accumulation. Roof joints are often covered with metal sheets or precast slabs to ensure waterproofing. In underground areas, additional waterproofing layers like glass cloth linoleum or rubber sheets are added to protect against moisture.
In contrast, settlement joints are designed to handle uneven foundation movement. They run through the entire height of the building, starting from the foundation, and allow different parts of the structure to settle independently. These joints are essential when there are significant differences in soil compressibility or when the building has varying heights or loads. The placement of settlement joints is guided by principles such as building shape, load distribution, and foundation type.
Seismic joints, also known as anti-vibration joints, are used in earthquake-prone areas (typically where seismic intensity is 8 or higher). They are designed to prevent structural damage caused by lateral forces during an earthquake. These joints are placed at the top of the foundation and extend through the building, ensuring that different sections can move separately. The minimum gap size is usually between 50–100 mm, and the building is divided into simple, rigid units to improve stability.
While the need for these joints varies by region, many countries have different standards. For instance, Germany and Eastern European countries tend to use strict spacing requirements, while Japan and the U.S. often rely on calculations to minimize or eliminate expansion joints. China has also developed its own theories and practices over time, adapting them to local conditions and engineering needs.
Overall, understanding and properly implementing deformation joints is crucial for ensuring the long-term durability and safety of buildings. Each type of joint plays a vital role in managing different forms of structural movement, and their design must consider both functional and aesthetic aspects.
Weighing cabinets are equipped with high-precision scales that can measure objects with extreme accuracy. These scales are often calibrated regularly to maintain their accuracy.
Temperature Control: To ensure accurate weighing results, weighing cabinets often have temperature control features. This helps to prevent fluctuations in temperature that can affect the accuracy of the scale.
Vibration Isolation: Vibrations can interfere with the accuracy of weighing. Weighing cabinets are designed to isolate vibrations, ensuring that the scale remains stable during the weighing process.
Draft Shields: Draft shields are used to protect the scale from air currents that can affect the weighing process. These shields create a still environment around the scale, ensuring accurate measurements.
Security Features: Some weighing cabinets may have security features such as locks or alarms to prevent unauthorized access and protect valuable equipment.
Customization Options: Weighing cabinets can be customized to meet specific requirements, such as size, scale type, and additional features.
Types of Weighing Cabinets
Product weight: 200KG
Dimension: 1372mm long; 593mm wide;1950mm high
Scale plate size: 200mm long; 338mm wide
Screen size: 10 inch touch screen
Product color: White yellow (customizable)
Capacity: 30 scales
Freight lane type: 6 floors * 5 lanes
Weighing sensor: A single weighing position can weigh up to 20 kg, a small weighing capacity of 5g, and an error of 1gram
Applicable system: optional card swiping, facial recognition, and fingerprint recognition
Power supply: AC220V/50HZ.No packaging required, can be weighed separately, and high-precision sensors automatically calculate weight
Open material requisition, convenient material requisition, and simple replenishment.Fasteners such as screws and nuts, various spare materials, and office supplies.Weighing cabinets, also known as balance enclosures or safety cabinets, are specialized pieces of laboratory equipment designed to provide a safe and controlled environment for precision weighing operations. These cabinets are particularly important when handling hazardous materials, such as powders, chemicals, or toxic substances.
Weighing cabinets protect the operator and the laboratory environment from exposure to hazardous materials.
Accuracy: The controlled environment within a Weighing Cabinet can help to ensure accurate and precise weighing results.
Compliance: Weighing cabinets are often required to comply with safety regulations and standards in industries such as pharmaceuticals, chemicals, and research.
Efficiency: By providing a dedicated space for weighing operations, weighing cabinets can improve efficiency and productivity in the laboratory.
Applications:
Pharmaceutical industry: Weighing cabinets are essential for handling and measuring pharmaceutical ingredients, ensuring product quality and safety.
Chemical laboratories: These cabinets are used for weighing chemicals and other hazardous substances in research and development settings.
Research laboratories: Weighing cabinets are valuable tools for scientists conducting various experiments and analyses.
Quality control: In industries where precision weighing is critical, such as food and beverage manufacturing, weighing cabinets are used for quality control purposes.
Types of Weighing Cabinets:
Standard weighing cabinets: These are general-purpose cabinets suitable for a wide range of applications.
Powder weighing cabinets: Designed specifically for handling powders, these cabinets often have specialized ventilation systems to prevent the spread of airborne particles.
Hazardous substance weighing cabinets: These cabinets are equipped with advanced safety features to protect operators from exposure to highly toxic or hazardous substances.
Factors to Consider When Choosing a Weighing Cabinet:
Safety requirements: Consider the specific hazards associated with the materials you will be handling and choose a cabinet that meets the appropriate safety standards.
Ventilation system: Evaluate the ventilation system to ensure it is adequate for your needs and complies with relevant regulations.
Size and capacity: Select a cabinet that is large enough to accommodate your weighing equipment and the materials you will be handling.
Ergonomics: Ensure that the cabinet's design is comfortable and ergonomic for the operator.
Additional features: Consider any additional features that may be beneficial, such as built-in lighting or power outlets.
By investing in a high-quality weighing cabinet, you can create a safe and controlled environment for your precision weighing operations, ensuring accurate results and protecting the health and safety of laboratory personnel.