TW580478B - Process for controlling the hydraulic chamber pressure of a diaphragm pump - Google Patents

Abstract

A process and system for controlling the pressure of a hydraulic chamber on a diaphragm pump. Such process and system particularly adapted to alleviate vacuum conditions in the diaphragm dispense chamber.

Description

580478 (2) • Last Filtration Pressure-Filtration Pressure at the Last Dispense Cycle • Last Filtration Pressure-Pressure in the Hydraulic Chamber at the End of Last Dispensing

IntelliGen also provides the following error indications: • Low pressure-warning when filtering, and another command to set the warning pressure value. • Filter pressure-warning to warn that the filter is clogged. This type of distribution pump requires control of hydraulic chamber pressure. SUMMARY OF THE INVENTION The present invention provides a method for controlling the pressure of a hydraulic chamber on a diaphragm pump, which uses a distribution liquid purge valve, a pressure converter signal, and a central processing unit (CPU). Brief Description of the Drawings Figure 1 provides a diagram of a pressure control system. Figure 2 provides a flowchart illustrating how the system works. DESCRIPTION OF SPECIFIC EMBODIMENTS The present invention provides a method for using a pressure transmission signal from a pressure transducer in a hydraulic chamber and using a liquid distribution purge valve to reduce diaphragm pressure when the hydraulic chamber is below a preset vacuum set point. Indeed, the present invention provides a component to prevent the hydraulic chamber of the diaphragm pump from being evacuated. As shown in Figures 1 and 2, this method is implemented by using a pressure conversion signal and its comparison with a vacuum set point. Once the set point is reached, a central processing unit sends a signal to the pump motor to stop the motor. A signal is then sent to the spiral coil valve that controls the pneumatic power, which is used to operate the distribution purge valve. By opening the valve, the gas is allowed to enter the dispensing liquid. So borrow 580478

(3) By removing the pressure on the side of the dispensing liquid from the diaphragm, the vacuum condition on the side of the hydraulic chamber of the diaphragm is gradually reduced. When a very high vacuum is created by the pressure inside the hydraulic chamber, the pump can cause serious damage, which prevents the pump from maintaining accurate and repeatable doses. The main additional feature of this new pump system software is to provide a degree of pressure control to protect the pump from damage or failure due to operation under high vacuum conditions.

This pump system software monitors hydraulic chamber pressure during distribution, purification, and filtration. When the software detects that the pressure exceeds the preset pressure range, it will stop the pump operation, immediately open the purge valve, and send an `` ERROR '' error message to the host computer. This is not only to protect against serious damage and failure, but also to detect Abnormal pump operation. Explanation of symbol representation 1 Error signal is output to the tracking central processing unit 2 Hydraulic chamber 3 Pressure converter _ 4 Pressure converter signal input 5 Pump head 6 Pump / motor stop signal '7 Purifier spiral coil valve Control signal · Purge valve pneumatic line 9 Printed circuit board with central processing unit at the remote end 10 Spiral coil valve

Claims (1)

580478 Patent application scope 1. A method for controlling the pressure of the hydraulic chamber of a diaphragm pump, the diaphragm pump includes a pressure converter, the method includes: setting a vacuum degree set point of the hydraulic chamber; monitoring a signal from the pressure converter ; And if the signal exceeds the set point, open a liquid distribution purge valve until the vacuum condition returns to the vacuum level set point. 2. The method according to item 1 of the scope of patent application, wherein the pump is closed before the purge valve is opened. 3. The method according to item 1 of the scope of patent application, wherein the pump is closed synchronously when the purge valve is opened. 4. The method according to item 1 of the scope of patent application, further comprising the step of sending a "pi error" message to the distribution path where the pump is located. 5. A system for controlling the pressure of the hydraulic chamber of a diaphragm pump, comprising: A pressure converter is installed to sense the pressure of the hydraulic chamber and provide a signal; * a purification line on the pneumatic line; a spiral coil valve that controls the purification valve; a central processing unit (CPU); and control software via the central The processing unit receives a pressure converter signal, and the control software compares it with a previously programmed set point. If the pressure converter signal indicates that the pressure in the hydraulic chamber exceeds the set point, the control software will instruct the pump to stop operating and instruct the purge valve On.