The working principle of the pressure gauge is to use the elastic sensitive element to generate elastic deformation under pressure and vacuum. The magnitude of the deformation variable and the applied pressure have a certain linear relationship, and are amplified by the transmission mechanism and indicated by the pointer on the index plate. Measured pressure. The following small series introduces pressure gauges and precautions for using pressure gauges. Pressure gauge verification 1, ordinary failure When checking pressure gauges, there are often some problems. First, let's talk about common faults. The first fault is the uneven pressure indication error, which is mainly caused by the failure of the spring tube deformation, or the improper adjustment of the free end of the spring tube and the gear ratio of the sector gear and the connecting rod. The second fault indication is low. The main cause of this fault is the unbalance of the transmission ratio, the leakage of the spring tube, or the leakage of the pilot line. The third daily failure is the phenomenon that the pressure gauge pointer is bouncing or sluggish. There are many reasons for this failure. There are four main points: the pointer collides with the surface glass or scale; there is friction; the center gear shaft is bent; and the two gears are contaminated. Object; the movable screw between the link and the fan gear is not flexible. 2, special faults When checking the pressure gauge, you will find the failure of the pointer back down. The main reason is that the leak of the checker or the oil cup needle valve is not smooth, resulting in poor sealing, and there may be a crack in the spring tube. Followed by the pointer does not return to zero failure, because the gossamer is not enough tight or large, it may loose the pointer. When adjusting the hairspring, the strength should be moderate, otherwise, the hairspring will be deformed. 3, careful examination Some gauges are small in size, and some small parts are easily overlooked by the examiner. Although they are small parts, they are very useful. Therefore, when calibrating the pressure gauge, we must be careful and careful, and we must not miss any factors that may affect it. We must verify all the components of the pressure gauge and confirm the accuracy before continuing to use it. Many pressure gauges have not been carefully examined, resulting in no way to reflect the correct data, which has had a very serious impact on the use of pressure gauges (boilers, enterprises). The use of pressure gauges Be very careful when using pressure gauges, for example, to record information, check, replace, etc. in a timely manner. The most important role of the pressure gauge is to be able to detect the pressure value, so we must pay attention to the record, and concentrate all the information on the analysis, only in this way can we get accurate data, so as to provide an accurate reference for future development. The second is the inspection of the pressure gauges. During the use of the pressure gauges, due to some human factors and objective factors, some failures may occur. Therefore, they must be checked frequently. Once problems arise, they can be repaired in time to ensure the normal operation. The third is the replacement of the pressure gauge. After any equipment has been used for a long time, it must be replaced, especially the special equipment such as the pressure gauge. The main reason is that the data reflected by the pressure gauge can determine the direction of the future work, and at the same time provide an accurate reference for future development. Therefore, it is necessary to ensure that any function of the pressure gauge can be used normally, once a certain function stops running. The timely replacement can avoid safety accidents. Editor's summary: The pressure gauge's verification and the use of pressure gauge's precautions are introduced here and hopefully helpful to everyone. If you want to know more about yourself, you can follow the information on this site. House Renovation Precautions Home Renovation Precautions Decoration Precautions House Renovation Precautions Premises Notice Pressure Gauges Verification
Safety valve also known as pressure relief valve, back pressure valve is automatically open and close according to the working pressure of the system. It is generally installed on the equipment or pipeline of the closed system to protect the system safe. When the pressure or temperature of the equipment or pipeline exceeds the set pressure of the safety valve, the pressure relief or temperature drop will be automatically opened to ensure that the medium pressure (temperature) in the equipment and pipeline is under the set pressure (temperature), so as to protect the normal operation of the equipment and pipeline, prevent accidents and reduce losses. Safety valve is widely used in: steam boiler, liquefied petroleum gas tank car or liquefied petroleum gas railway tank car, oil production well, high pressure bypass of steam power generation equipment, pressure pipeline, pressure vessel, etc.
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The use of pressure gauges to check the use of pressure gauges