High-pressure grinding tool for end surface of main throttle valve

Abstract

The invention discloses a high-pressure grinding tool for an end surface of a main throttle valve. The high-pressure grinding tool for the end surface of the main throttle valve comprises a speed reduction motor, a speed reduction motor support, a bearing chamber, a chuck, an end surface grinding assembly, an inner hole grinding assembly and a spline shaft, wherein the speed reduction motor is fixedly connected to the speed reduction motor support, and the bearing chamber is fixedly arranged in the speed reduction motor support; an output shaft of the speed reduction motor is concentric with acenter axis of the bearing chamber; the spline shaft is fixedly connected to the speed reduction motor and is driven to rotate by the speed reduction motor; the spline shaft is sleeved with the bearing chamber; the chuck, the end surface grinding assembly and the inner hole grinding assembly are sequentially coaxially fixedly connected to the side surface of the spline shaft; the inner hole grinding assembly is fixedly connected to one end, far away from the speed reduction motor, of the spline shaft; the end surface grinding assembly is a grinding plate which is fixedly connected to the spline shaft; and the inner hole grinding assembly is a grinding head which is fixedly connected to the spline shaft. The high-pressure grinding tool for the end surface of the main throttle valve has thebeneficial effects that the structure is reasonable; the shaft is dual-purpose; the stability is high; the use efficiency is high; and the grinding effect is good.

Description

Technical field: [0001] The invention relates to the field of mechanical processing, in particular to a high-pressure main steam valve end face grinding tool. Background technique: [0002] The on-site grinding of the existing valve joint surface (or sealing surface) is mainly hand-held, and the hand-held grinding is to grind and repair the pitted sealing surface when the reference surface is basically intact, so it will not cause serious damage to the reference surface , not to mention that the grinding amount is relatively small, and the operation is feasible; however, if the reference plane is completely damaged after repeated repairs, it can only be returned to the factory for repair; hand-held grinding tools have low cost and high repair efficiency, and are widely used in various types of valves in the power industry. It is the repair of the small-bore main valve. If the caliber of the valve is large (the caliber is larger than DN350) and the installation location is s...

AI Technical Summary

Problems solved by technology

[0002] The on-site grinding of the existing valve joint surface (or sealing surface) is mainly hand-held, and the hand-held grinding is to grind and repair the pitted sealing surface when the reference surface is basically intact, so it will not cause serious damage to the reference surface , not to mention that the grinding amount is relatively small, and the operation is feasible; however, if the reference plane is completely damaged after repeated repairs, it can only be returned to the factory for repair; hand-held grinding tools have low cost and high repair efficiency, and are widely used in various types of valves in the power industry. It is the repair of the small-bore main valve

If the caliber of the valve is large (the caliber is larger than DN350) and the installation location is special, it will be difficult to repair the sealing surface with a hand-held grinding tool. The diameter of the flange joint surface of the main valve of the thermal power plant and the sealing surface of the door head seat are large. , the coaxiality and verticality of the sealing surface are relatively high. After the new valve is used, the first few grindings are mainly to remove the hard oxide layer. The operation is relatively simple and can be completed manually or semi-manually. However, after several years of use, due to repeated To clean up the oxide layer and small defects gradually increase, semi-automatic or fully automatic mechanical equipment (or equipment) is required to enter the site to grind the full sealing surface, so that the original color is fully exposed, the surface roughness should reach Ra1.6 or above, and the verticality should reach 0.03 mm / 300mm, the concentricity reaches 0.05mm / 500mm, the grinding amount ranges from 0.3mm to 1.5mm. The grinding tools and grinding methods seen in the current market cannot meet the above requirements

Images