Pressure reducing device and dispensing controller provided with same

Abstract

The invention provides a pressure reducing device and a dispensing controller provided with the same. The pressure reducing device comprises a pressure reducing valve, a control module and a special-shaped pipe joint. The pressure reducing valve is provided with an air inlet, an air outlet and an exhaust port, the air inlet is connected to an air pressure source, and the air outlet is connected toa load to provide an output air pressure to the load; the control module is electrically connected to the pressure reducing valve, and the control module sends an electric signal to the pressure reducing valve to set the output air pressure of the pressure reducing valve; a tube cavity penetrating axially is defined in the special-shaped pipe joint, one or more air flow channels communicating tothe pipe cavity are formed on the outer wall surface of the special-shaped pipe joint, and one end of the special-shaped pipe joint is connected to the load while the other end of the special-shaped pipe joint is connected to the air outlet. The pressure reducing device according to the embodiment of the invention is simple in structure, can weaken overshoot of the output air pressure and recoverthe output air pressure higher than the set air pressure to be consistent to the set air pressure within a shorter time, and particularly can enhance the consistence of working air pressure when the dispensing controller dispenses glue at a high speed repeatedly.

Description

technical field [0001] The invention relates to the technical field of dispensing machines, in particular to a decompression device and a dispensing controller with the same. Background technique [0002] The output air pressure proportional control principle of the pressure reducing valve is: the built-in control circuit of the pressure reducing valve receives the electrical signal to set the output air pressure. Once the electrical signal increases, the air supply solenoid valve built in the pressure reducing valve opens, and part of the supply pressure passes through The air supply solenoid valve becomes the output pressure, which is collected by the built-in pressure sensor and fed back to the control circuit; similarly, once the electrical signal decreases, the exhaust solenoid valve built in the pressure reducing valve opens, and the output side is exhausted. The solenoid valve discharges part of the pressure from the exhaust port, and the built-in pressure sensor coll...

AI Technical Summary

Problems solved by technology

[0006] Defect 1: After the load connected to the output air pressure interface of the pressure reducing valve completes this operation, the output air pressure appears overshoot, and the next operation needs to wait until the output air pressure drops from the overshoot to be consistent with the set air pressure before starting;

[0007] Defect 2: After the load connected to the output air pressure interface of the pressure reducing valve completes this operation, the output air pressure appears overshoot, and the next operation starts ahead of schedule, so the initial air pressure of the next operation is relatively high

[0008] In the application of the pressure reducing valve, defect 1 leads to a decrease in operating efficiency, and defect 2 leads to differences in operating parameters. When the pressure reducing valve is applied to a dispensing controller, defect 1 leads to a reduction in dispensing efficiency (that is, the interval between repeated dispensing is shorter Long), defect 2 leads to poor consistency of dispensing volume (different initial air pressure of glue dispensing and different dispensing duration lead to uncontrollable air pressure adjustment)

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