Water cooled centrifugal machine of pipe die sleeve applied to long tube drawing/heating grating system

Abstract

The invention provides a water cooled centrifugal machine of a pipe die sleeve applied to a long tube drawing / heating grating system, wherein the water cooled centrifugal machine facilities water temperature control and is long in pipe die service life, high in productivity, low in equipment failure rate and high in pipe quality. The cooling concept and the equipment structure are brand new and subversive changes; water temperature seriously influences pipe quality and service life of the pipe die, but water temperature can be controlled easily by making the distance between the pipe die and the pipe die sleeve small and applying all cooling water to cooling. The wall of the pipe die is thin, which is favorable for prolonging the service life of the pipe die and improving productivity. No steam layers is arranged on the outer surface of the pipe die, thereby being favorable for improving productivity. The temperature of the pipe die can be controlled easily, thereby being favorable for prolonging the service life of pipe die. The water cooled centrifugal machine is not provided with pipe die supporting wheels or pinch rollers, so there is no possibility of soaking of the supporting wheels and pinch rollers, and the failure rate is low. In addition, the water cooled centrifugal machine is not provided with a centrifugal machine head, so there is no possibility of soaking of the centrifugal machine head, and the failure rate is low. The pipe die sleeve travels at different speed at different stages so the wall thicknesses of produced pipes are uniform.

Description

technical field [0001] The invention belongs to the technical field of metal casting, and in particular relates to a water-cooled centrifuge for pipe mold sleeves used in long-drawn pipes / heating pouring systems. Background technique [0002] At present, the cooling methods of water-cooled centrifuges adopt water immersion and spray cooling methods, the extubation device is a fixed extubation device, and the pouring system has no heating device. [0003] The disadvantages of the water-immersed water-cooled centrifuge: ①Water temperature seriously affects the quality of the pipe and the life of the pipe mold, only a part of the water acts as a cooling effect, and the water temperature is difficult to control; ②The wall thickness of the pipe mold: it is difficult to adjust the center line of the pipe mold, and it needs Ensure that the small pipe mold has a certain rigidity, so the wall of the pipe mold needs to be thick, which will affect the thermal conductivity and the life ...

AI Technical Summary

Problems solved by technology

[0003] The disadvantages of the water-immersed water-cooled centrifuge: ①Water temperature seriously affects the quality of the pipe and the life of the pipe mold, only a part of the water acts as a cooling effect, and the water temperature is difficult to control; ②The wall thickness of the pipe mold: it is difficult to adjust the center line of the pipe mold, and it needs Ensure that the small pipe mold has a certain rigidity, so the wall of the pipe mold needs to be thick, which will affect the thermal conductivity and the life of the pipe mold; ③ there is a steam layer on the outer surface of the pipe mold, the water body is relatively static, the thermal conductivity is poor, and the productivity is affected; ④ Pipe mold The temperature is not easy to control: it is not conducive to the life of the pipe mold; ⑤The pipe mold support wheel and pressure wheel are immersed in water, the wheel lubrication effect is poor, and the failure rate is high; ⑥The head of the centrifuge is half immersed in water, and the water will affect the head The life of the medium bearing; ⑦It is difficult to adjust the centerline of the pipe mold, especially the small pipe mold

In this case, during the rotation of the pipe mold, it is easy to generate large vibration and noise, which will affect the quality of the pipe; ⑧It takes a long time to replace the pipe mold, and it takes about 25-45 minutes to replace the same pipe mold. About 4-8 hours for specification replacement

The same specification should be replaced at least once per shift, three times a day, resulting in low utilization of the centrifuge

[0004] Disadvantages of the spray water-cooled centrifuge: ① wall thickness of the pipe mold: it is difficult to adjust the center line of the pipe mold, and it is necessary to ensure that the small pipe pipe mold has a certain rigidity, so the wall of the pipe mold needs to be thick, which will affect the thermal conductivity and the life of the pipe mold ; ②The pipe mold supporting wheel and pressure wheel are sprayed with water, the wheels are not easy to lubricate, and the failure rate is high; ③The centrifuge head is sprayed with water, which will affect the life of the bearing in the head; ④It is difficult to adjust the tube Mold centerline, especially for small tube molds

In this case, during the rotation of the pipe mold, it is easy to generate large vibration and noise, which will affect the quality of the pipe; ⑤It takes a long time to replace the pipe mold. About 4-8 hours for specification replacement

The same specification is changed at least once in each shift, three times a day, resulting in low effective utilization of the centrifuge

[0005] Because water-immersed and spray-type water-cooled centrifuges have shortcomings such as high failure rate, difficult adjustment of pipe molds, low equipment utilization, high vibration noise and low productivity, we have invented a water-cooled centrifuge with pipe mold sleeves. And the cooling method has been completely changed, thus solving the above problems

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