Card-mounted vortex flowmeter parameters
The vortex flowmeter is based on the Karman vortex principle to measure the volume flow of gas, steam or liquid, the volume flow or mass flow of standard conditions.
View MoreAs the core component of various heating equipment, electric heating resistance wire directly affects the operating efficiency and maintenance cost of the equipment.
Is the electric heating resistance wire often burned out?
As the core component of various heating equipment, electric heating resistance wire directly affects the operating efficiency and maintenance cost of the equipment. However, in practical applications, resistance wires often burn out, causing a lot of trouble to users. This article will delve into the common causes, preventive measures and solutions of resistance wire burnout to help you extend the service life of the resistance wire and improve the operating efficiency of the equipment.
1. Common causes of resistance wire burnout
There are many reasons for resistance wire burnout. In summary, they mainly include the following aspects:
1 . Excessive current
When the current passing through the resistance wire exceeds its rated current, excessive heat will be generated, causing the temperature of the resistance wire to rise sharply and eventually burn out. The cause of excessive current may be excessive voltage, short circuit, overload, etc.
2. Poor heat dissipation
The resistance wire will generate a lot of heat when working. If the heat dissipation is poor, the heat will accumulate on the resistance wire, causing the temperature to be too high and burn out. The reasons for poor heat dissipation may be insufficient heat dissipation area, unreasonable heat dissipation structure design, blockage of heat dissipation channels, etc.
3. Resistance wire material issues
Resistance wires of different materials have different resistivities and heat resistance properties. If the resistance wire material is chosen improperly, such as using resistance wire with poor temperature resistance, it will easily burn out in a high temperature environment.
4. Oxidative corrosion on the surface of the resistance wire
When the resistance wire works in a high-temperature environment, oxidation reactions easily occur on the surface and an oxide film is formed. The conductivity of the oxide film is poor, which will cause the local resistance of the resistance wire to increase, increase the heat generation, and eventually burn out.
5. Mechanical damage
If the resistance wire is impacted by external force or excessively bent during installation, use or transportation, it will easily cause mechanical damage, causing the resistance wire to break or partially break. The resistance increases and eventually burns out.
2. Measures to prevent the resistance wire from burning out
In order to avoid the losses and trouble caused by the resistance wire from burning out, the following preventive measures can be taken:
1 . Select the appropriate resistance wire
Select the appropriate resistance wire material and specifications based on the equipment's power, operating voltage, operating temperature and other parameters. Ensure that the rated current and temperature resistance of the resistance wire meet actual working requirements.
2. Reasonably design the circuit
When designing the circuit, the wire cross-sectional area, fuse specifications and control components should be reasonably selected to ensure that the working current of the resistance wire is within a safe range. At the same time, circuit short circuits and overloads should be avoided.
3. Strengthen the heat dissipation design
Design a reasonable heat dissipation structure based on the heating power of the resistance wire and the working environment temperature. The heat dissipation efficiency can be improved by increasing the heat dissipation area, optimizing the heat dissipation channels, and using cooling fans.
4. Regular inspection and maintenance
Regularly check whether there is oxidation corrosion or mechanical damage on the surface of the resistance wire.Mechanical injury, etc. If problems are found, the resistance wire should be cleaned or replaced in time. At the same time, dust and debris on the heat dissipation device should be cleaned regularly to ensure good heat dissipation effect.
5. Correct operation and use
When using electric heating equipment, the operating procedures should be strictly followed. Avoid long-term overload operation of the equipment, pay attention to the operating status of the equipment, and stop the equipment for inspection and processing if any abnormal conditions are found.
3. Solutions to burnt resistance wire
If the resistance wire has been burned, corresponding solutions need to be taken according to the specific situation:
1. Replacement Resistance wire
If the resistance wire has been completely burned out, you need to replace it with a new one. When replacing, you should choose a resistance wire with the same specification and model as the original resistance wire, and pay attention to the firm installation.
2. Repair the resistance wire
If the resistance wire is only partially burned, you can try to repair it. Repair methods include welding, casing, etc. However, the performance of the repaired resistance wire may be affected, so it is recommended to replace it with a new one if conditions permit.
IV. Summary
Burn out resistance wire is a common problem in electric heating equipment, but by taking appropriate preventive measures and solutions, the service life of the resistance wire can be effectively extended. Reduce equipment failure rate. I hope this article can help you better understand the causes, preventive measures and solutions of resistor wire burnout, and ensure the safe and stable operation of the equipment.
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