Measures to enhance the stability of vacuum pressure switches

Enhancing the stability of vacuum pressure switches can be approached from aspects such as component selection, structural design, environmental protection, installation and commissioning, maintenance and upkeep, as well as electrical compatibility. The following is a detailed introduction:

Optimize component selection

Select high-quality sensors: Sensors are the core components of vacuum pressure switches, and their quality directly affects the stability of the switch. Sensors with high precision, high reliability and good stability should be selected. For instance, some well-known brands of piezoresistive or capacitive sensors have undergone strict quality inspection and long-term market verification, and can maintain stable performance under various working conditions. These sensors have relatively small temperature drift and zero drift, and can accurately sense changes in vacuum pressure.

Select high-quality electrical components: The electrical components inside the switch, such as relays and integrated circuits, can also have an impact on stability. Selecting electrical components of reliable quality and stable performance can reduce the misoperation or malfunction of switches caused by component failures. For instance, the use of relays with high insulation performance and long service life can ensure that the switch maintains a good electrical connection during frequent operation.

Improve the structural design

Enhance the mechanical structure strength: The mechanical structure of the vacuum pressure switch should have sufficient strength and rigidity to withstand the influence of external pressure and vibration. The shell and internal structural components can be made of high-strength metal materials, and the overall stability can be enhanced through reasonable structural design. For instance, adding reinforcing ribs, optimizing the design of connection parts, etc., can reduce structural deformation and loosening caused by mechanical stress.

Optimize the sealing structure: Good sealing performance is the key to ensuring the stability of vacuum pressure switches. High-quality sealing materials and advanced sealing techniques are adopted to ensure that the switch can effectively prevent the entry of external air or impurities in various working environments. For instance, rubber O-rings, metal gaskets and other sealing components are used, and their installation positions and fastening forces are strictly controlled to ensure the sealing effect.

Strengthen environmental protection

Temperature control: Temperature changes can affect the performance of vacuum pressure switches, leading to measurement errors and a decline in stability. The working temperature of the switch can be controlled by installing heat dissipation devices, heating devices or choosing components with good temperature adaptability. For instance, in high-temperature environments, heat sinks or fans can be added to enhance the heat dissipation efficiency. In low-temperature environments, heating tapes or heaters can be installed to prevent the performance of components from declining due to low temperatures.

Moisture-proof and dust-proof: Moisture and dust can erode the internal components of the switch, affecting its electrical and mechanical performance. A well-sealed casing can be adopted, and moisture-proof and dust-proof devices such as desiccants and dust filters can be installed. For instance, in a humid environment, desiccants can be placed inside the switch to absorb moisture from the air. In a dusty environment, a dust filter can be installed to filter the air entering the switch.

Anti-vibration design: Vibration can cause the components inside the switch to loosen and have poor contact, thereby affecting its stability. Shock absorption measures can be adopted, such as installing shock absorption pads and shock absorption brackets, to reduce the impact of vibration on the switch. For instance, when installing a vacuum pressure switch on equipment with significant vibration, a rubber shock-absorbing pad can be placed between the switch and the equipment to absorb the vibration energy.

Standard installation and commissioning

The correct installation position: The selection of the installation position is crucial to the stability of the vacuum pressure switch. The switch should be installed at a position that can accurately reflect the vacuum pressure of the system. It should be avoided to be installed near heat sources, vibration sources or places with unstable airflow. For instance, when installing switches on vacuum pipelines, it is advisable to choose straight sections of the pipeline and avoid installing them at elbows, valves and other locations to minimize the impact of the fluid on pressure measurement.

Precise parameter debugging: After installation is completed, the vacuum pressure switch needs to be debugged in accordance with the standardized operation procedures. During the debugging process, it is necessary to ensure that the parameters such as the action pressure and reset pressure of the switch are set accurately, and multiple tests and verifications should be conducted to ensure the stability and reliability of the switch. For example, when setting the action pressure, increase or decrease the pressure slowly, observe the action of the switch, and make fine adjustments according to the actual situation.

Regular maintenance and servicing

Cleaning and inspection: Regularly clean the vacuum pressure switch to remove surface dust, oil stains and other impurities. At the same time, check whether the appearance of the switch is damaged, whether the connection parts are loose, and whether the sealing parts are aged, etc. For instance, a clean soft cloth or brush can be used for wiping, but it is important to avoid using overly rough tools or chemical solvents to prevent damage to the surface and internal components of the switch.

Calibration test: Regularly conduct calibration tests on the switch to ensure that its measurement accuracy and stability meet the requirements. Calibration can be carried out using professional calibration equipment or standard pressure sources, and the parameters of the switch can be adjusted based on the calibration results. The calibration cycle can be determined based on the frequency of use and importance of the switch. Generally, it is recommended to conduct calibration every six months or once a year.

Improve electrical compatibility

Electromagnetic shielding: In some environments with strong electromagnetic interference, vacuum pressure switches may be disturbed by electromagnetic signals, leading to measurement errors or malfunctions. Electromagnetic shielding measures, such as using metal casings and shielded cables, can be adopted to reduce the impact of electromagnetic interference. For instance, installing the switch inside a metal shielding box and grounding the box can effectively shield against external electromagnetic interference.

Reasonable wiring: When laying electrical wiring, it is necessary to avoid laying the signal lines of switches in parallel with power lines, strong current lines, etc., to reduce electromagnetic coupling and interference. At the same time, it is necessary to ensure that the length of the signal line is moderate to avoid signal attenuation and increased interference caused by excessive length. For instance, independent signal line troughs or pipes can be used for wiring to isolate the signal lines from other lines.