Temperature protection device of thermal bimetallic strip

Abstract

The invention relates to a temperature protection device of a thermal bimetallic strip. The temperature protection device comprises the thermal bimetallic strip, a gas path outlet and a base, wherein the thermal bimetallic strip is fixed on the base through a fixed screw, and the gas path outlet is positioned below the thermal bimetallic strip and penetrates through the base. By virtue of the technical scheme of the temperature protection device, the temperature protection device is installed in the position of a gas inlet of a vacuum pump, and when the internal operating temperature reaches 130 DEG C, the thermal bimetallic strip is automatically deformed from a warping state to a flat state, so that the gas path outlet is fully sealed, and gas cannot pass through; when the internal operating temperature returns to normal temperature, the thermal bimetallic strip is automatically deformed to return to the initial warping state, the gas path outlet is opened, the vacuum pump can be normally used, and accidents such as internal combustion, explosion and the like caused by overtemperature in the vacuum pump can be effectively prevented.

Description

technical field [0001] The invention relates to a temperature protection device, in particular to a thermal bimetal strip temperature protection device which can be used for thermal protection of the air inlet of a vacuum pump. Background technique [0002] Thermal bimetallic sheet is also called bimetallic sheet. Due to the different thermal expansion coefficients of the metal elements on both sides, when the temperature changes, the deformation of the active layer is greater than that of the passive layer, and the thermal bimetallic sheet will bend to one side of the passive layer. The higher expansion coefficient is the active layer, and the lower expansion coefficient is the passive layer. [0003] In some high-temperature environments, if the temperature of the use environment continues to rise, it will have a greater impact on the service life of the equipment and products. If no measures are taken, serious accidents will occur, so taking thermal protection measures be...

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to provide a thermal bimetal temperature protection device with a new structure. The technical problem to be solved is to set it at the air inlet position of the vacuum pump. After reaching a certain temperature, the thermal bimetal will automatically deform and cover Cover the air inlet, and the air inlet will no longer take in air; when the temperature drops to the normal range, the hot metal sheet will automatically return to its original shape, the air inlet will open, and the vacuum pump will work normally, which is more suitable for practical use.

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