Air compressor with pressure gauge

Abstract

The invention provides an air compressor with a pressure gauge, and particularly relates to an air compressor which is movably combined with the pressure gauge, and the pressure gauge can generate a mode similar to piston motion to display pressure. The pressure gauge is further provided with an overpressure protection unit, and the overpressure protection unit can be used for measuring the current pressure value change through the installed pressure gauge and releasing the excess pressure when the pressure value reaches the set safety pressure maximum value. The air compressor can achieve safety benefits without additionally arranging a safety valve, and cannot cause overpressure damage to an object to be inflated.

Description

technical field [0001] The present invention provides an air compressor with a pressure gauge, especially an air compressor that can be combined with a pressure gauge that can display pressure in a manner similar to piston movement. The pressure gauge is also equipped with a pressure gauge. The overpressure protection unit can measure the change of the current pressure value through the installed pressure gauge, and when the pressure value reaches the set maximum safe pressure, the excess pressure will be released by the overpressure protection unit to let the air The compressor can achieve safety benefits without installing additional safety valves, and will not cause overpressure damage to inflatable items. Background technique [0002] Early air compressors, especially the small air compressors used to inflate automobile tires, air cushions, etc., had only two ducts on the air storage seat, and one duct The tube is used to install the round box-shaped pressure display ga...

AI Technical Summary

Problems solved by technology

[0002] Early air compressors, especially the small air compressors used to inflate automobile tires, air cushions, etc., had only two ducts on the air storage seat, and one duct The tube is used to install the round box-shaped pressure display gauge, and the other manifold is used to connect the hose with a gas nozzle at one end, which is connected to the object to be inflated, such as a car tire, operated by an air compressor The generated compressed air is sent to the object to be inflated to achieve the purpose of inflation, and the pressure display gauge can provide the user with the current visual pressure value as a basis for controlling the safety of the inflation action; this conventional round box shape The pressure display gauge is a mechanical pointer pressure gauge made by using the principle of Burden Tube. Because this kind of Burden tube pressure display gauge requires more precision components, the precision used Components are also very susceptible to damage, resulting in loss of accuracy in measurement; therefore, Baden tube pressure gauges are not effective in use

In order to overcome the lack of use of the Baden tube type pressure display gauge, a utility model of an inflator pressure display device has been disclosed in the Japanese Patent Gazette. It mainly has a hollow tube body, a sheath and an air inlet joint are provided at the two ends of the tube body, a flat plate body and a spring that can move linearly in the tube body are provided in the tube body, and a spring is arranged outside the tube body. There is a scale, and the most characteristic feature on the pipe body is a pressure relief hole. When the push block receives the compressed air from the inflator, the flat plate can compress the spring and move linearly. When the inflation pressure exceeds At the highest set pressure, the pressure relief hole provided by the hollow pipe body will release the excess pressure, so as to protect the safety of the inflated object; this known and disclosed invention has broken through the conventional bar in terms of structural design. Mounted tube-type pressure display gauge, but because the area of ​​the pressure relief hole as an overpressure safety protection is too narrow, it is a dot-shaped round hole, and because the inflation speed of the inflator is quite fast, the pressure relief hole is in the The performance of instantaneous pressure relief is not good. On the other hand, the pressure relief hole is also easily blocked by the circulating dirt and dust and the dust mixed with the lubricating oil stains on the inflator body to increase smooth operation, which may reduce or lose The use function of pressure relief; on the other hand, it is worth noting that one end of the strip-shaped planar body is movably connected to the groove of the push block, and the other end is the perforation pierced through the center of the sheath. When the push block and the spring Under the influence of the high-frequency vibration of the inflator, the end of the planar body connected to the push block is more likely to loosen and deviate, which will cause the other end of the planar body to form a deflected displacement movement. The offset travel path will lead to increased friction between the periphery of the plate that penetrates the sheath perforation and the perforation, and it is easy to wear the peripheral wall of the perforation and expand the perforation area, and the perforation that is worn and enlarged will be more Cause the shaking and vibration of the plane plate body, and it is more likely to cause the plane plate body and the push block to loosen or completely fall off, so that the pressure measurement will be hindered or lose accuracy; on the other hand, the plate body The length of the linear displacement plus the composition length of the scale will also increase the length obstacle of the entire display device in the space design, and it is also a place to be considered and improved

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