A control loop for variable filling pressure and its control method

A technology of control loop and control method, applied in pipeline system, mechanical equipment, gas/liquid distribution and storage, etc., can solve the problems of affecting production takt time, slow filling of equipment, poor filling accuracy, etc., and improve the filling takt time , Simple control, strong versatility

Active Publication Date: 2011-12-28
CHERY AUTOMOBILE CO LTD
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AI Technical Summary

Problems solved by technology

This method of liquid filling mainly has the following defects: This pressure control method mainly has the following defects: 1. If the filling pressure is low, the equipment will be filled slowly, which will affect the production cycle; 2. If the filling pressure is high, the pipeline of the automobile system will It is easy to be burst by the liquid pressure; 3, and the accuracy of liquid addition is poor

Method used

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  • A control loop for variable filling pressure and its control method
  • A control loop for variable filling pressure and its control method

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Embodiment Construction

[0024] The present invention will be described in detail below according to the accompanying drawings, which is a preferred embodiment among various implementations of the present invention.

[0025] The idea of ​​the present invention is: according to the characteristics of the filling process, the filling process is divided into two steps, (1) when starting to fill, because the automobile system pipeline is in a vacuum negative pressure state in advance, after a period of time, with Fluid filling, the pressure in the pipeline from negative pressure to normal atmospheric pressure, this section can be defined as "stage I". (2) Subsequently, as the fluid continues to be filled, the pressure in the automotive fluid pipeline rises from atmospheric pressure to the final filling pressure required by the process, and this section is defined as "Stage II". In the present invention, through loop control, high pressure is used for filling in phase I to increase the filling speed; in ph...

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Abstract

The invention relates to a control loop capable of changing a filling pressure and a control method thereof. The control loop comprises an air supply, an electromagnetic valve, a pilot overflow valve, a remote pressure regulating valve and a PLC (programmable logic controller), wherein the air supply is connected with the remote pressure regulating valve, and then is connected with a remote control port of the pilot overflow valve through the electromagnetic valve so as to be used for achieving the remote control of the filling pressure; the pilot overflow valve is mounted on a filling loop; an overflow port is connected with a liquid storing tank through a hydraulic pipeline; and the PLC is connected with the electromagnetic valve and can further send an instruction to control the connection, the disconnection and the switching of the electromagnetic valve, so that pressure regulating valves with different pressures are connected with a remote control end of the overflow valve to be used for achieving the automatic switching of a high filling pressure and a low filling pressure.

Description

technical field [0001] The invention relates to a control loop for variable filling pressure and a control method thereof. Background technique [0002] During the production process of automobile assembly, automobiles need to be filled with antifreeze fluid, brake fluid, washer fluid, power steering fluid and other fluids online. The fluid filling process of the filling equipment on the existing automobile assembly line is as follows: First, install the filling nozzle on the corresponding tank mouth of the automobile → the equipment vacuumizes the automobile fluid pipeline system → leak detection (vacuum protection Pressure)→filling→filling and keeping pressure. After a whole set of filling process is completed, the operator takes out the gun head again, and the filling is completed. [0003] At present, the liquid filling method of the filling equipment visible on the market is: the equipment filling pump (gear pump, plunger pump, etc.) extracts the original liquid from ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F17D1/14F17D3/01
Inventor 叶迎富张青松
Owner CHERY AUTOMOBILE CO LTD
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