An automobile coating electrophoretic circulating pump shaft seal and spray composite system

Abstract

The invention provides an automotive painting electrophoresis circulating pump shaft sealing and spraying composite system. The system comprises a shaft sealing liquid buffer tank, a shaft sealing liquid tank, an ultrafiltrate tank, shaft sealing liquid supplying pumps, an ultrafiltrate spraying pump, an electrophoresis circulating water pump, a turbidity detector, a first three-way valve, a second three-way valve and a one-way circulating valve. According to the system, the shaft sealing liquid buffer tank and the turbidity detector are arranged in front of the shaft sealing liquid tank, the first three-way valve is arranged between the shaft sealing liquid buffer tank and the shaft sealing liquid tank and the ultrafiltrate tank, ultrafiltrate is automatically detected, the ultrafiltrate with abnormal parameters is stored in the ultrafiltrate tank, therefore, shaft sealing of the electrophoresis circulating water pump is protected, and normal work of the electrophoresis circulating water pump is guaranteed; in addition, one-way circulation of tank liquid in the shaft sealing liquid tank and the ultrafiltrate tank is achieved through the one-way circulating valve, and therefore the shaft sealing liquid tank and the ultrafiltrate tank do not influence each other in use and can commonly use one kind of the liquid; meanwhile, by designing the second three-way valve behind the ultrafiltrate spraying pump, in-time automatic reflux of the sprayed ultrafiltrate is achieved, and then pure ultrafiltrate is effectively saved.

Description

technical field [0001] The invention relates to the field of automobile coating electrophoresis, in particular to an automobile coating electrophoresis circulating pump shaft seal and spray composite system. Background technique [0002] In the process of electrophoretic coating of automobile body, in order to avoid the deposition of electrophoretic paint and damage the electrophoretic paint, the electrophoretic paint in the electrophoretic tank needs to be continuously circulated by the electrophoretic circulating pump for 24 hours. In order to solve the problem of damage to the circulating pump in the shaft, it is necessary to use the shaft seal fluid to mechanically seal the rotating shaft of the circulating pump, so as to improve the service life of the circulating pump. At the same time, the surface of the body after electrophoresis is coated with electrophoretic paint, so it is necessary to spray and wash the body with electrophoretic ultrafiltrate, so as to recycle th...

AI Technical Summary

Problems solved by technology

[0005] 1. When the electrophoretic paint ultrafiltration module system is damaged and the ultrafiltrate is abnormal, the system cannot give an alarm in time;

[0006] 2. When the electrophoretic paint ultrafiltration module system is damaged and the ultrafiltrate is abnormal, the shaft sealing system cannot continue to provide pure ultrafiltration shaft sealing fluid to seal the circulating pump, which is easy to damage the mechanical sealing equipment of the electrophoretic circulating pump;

[0007] 3. When the electrophoretic paint ultrafiltration module system is damaged and the ultrafiltrate is abnormal, it is necessary to manually close the shaft sealing system immediately, which cannot guarantee the continuous operation of the electrophoretic paint circulating pump;

[0008] 4. Since the pressure of the shaft seal liquid becomes smaller after passing through the mechanical seal of the electrophoresis circulating pump, the pressure at the outlet of the shaft seal of the electrophoresis circulating pump is lower than the pressure at the inlet of the shaft seal. There is a large pressure difference between the two, which is easy to damage the circulating pump. seal up;

[0009] 5. When the body ultrafiltrate is sprayed and washed, automatic spraying cannot be realized, and there is a waste of ultrafiltrate

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