Constant-pressure-controlled weighing filling device and method

Abstract

The invention discloses a constant-pressure-controlled weighing filling device and method. The constant-pressure-controlled weighing filling device comprises a storing tank, a total-control ball valve, a liquid-level detecting switch and a safety valve. A material inlet in the storing tank is located below the liquid level, and a material outlet is located in the lowest point of the lower portionof the storing tank. The liquid-level detecting switch is located in the middle of the storing tank and comprises sensors which are arranged on the protective liquid level, the high liquid level and the low liquid level correspondingly. The situations that the outlet pressure is not changed with change of the inlet pressure and keeps constant can be achieved, and in the filling process through a plurality of material guns, the filling precision is not influenced by pressure impact caused by successive closing of the material guns; and the constant-pressure-controlled weighing filling device and method are wide in application range and can be used for filling of liquid materials in all types of 2-30 L barrel shapes, through constant control, the filling precision is improved effectively, and the filling speed is increased effectively.

Description

technical field [0001] The invention is suitable for the field of liquid filling, especially for the filling of liquid materials below 30L, and specifically relates to a weighing filling device and filling method controlled by constant pressure. Background technique [0002] Small barrels below 30L require high filling accuracy. Due to the water hammer effect during filling, the filling accuracy is greatly affected by the material pressure. The existing products on the market can complete the filling of liquid materials below 30L, and their accuracy is limited by the filling speed. The higher the accuracy requirement, the lower the filling speed. At present, the requirements for precision and filling speed are getting higher and higher in the market, and it is difficult for existing products to meet the requirements. Contents of the invention [0003] Aiming at the problem of incompatibility between filling accuracy and filling speed in the prior art, the present inventi...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problem of incompatibility between filling accuracy and filling speed in the prior art, the present invention provides a constant pressure control weighing filling device and filling method, which uses constant pressure control to improve filling accuracy and achieve constant pressure at the outlet. The change is kept constant by the change of the inlet pressure, and the filling accuracy is not affected by the pressure shock caused by the closing of the guns during the filling process of multiple guns, and the filling speed is guaranteed at the same time

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