SU1283117A1 - Control system for pump-and-accumulator station of hydraulic presses - Google Patents

Abstract

The invention relates to mechanical engineering, namely to control systems of pump-accumulator stations of hydraulic presses. The purpose of the invention, an increase in efficiency, is achieved by installing a flow meter control system in a pressure line. The latter, in conjunction with liquid flow sensors with presses, sends signals to the microprocessor, where the optimal number of pumps to be activated is calculated and the command is given to turn on or off their relief valves and electric drives. 1 il.

Description

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The invention relates to mechanical engineering, namely to control systems of pump-accumulator stations of hydraulic presses.

The purpose of the invention is to increase the efficiency by automatically putting the optimal number of pumps into operation, depending on the liquid consumption of the presses.

The drawing is a schematic diagram of the control system.

valves 5, pumps 3 begin to inject fluid into the pressure line to presses 4, the flow meter 7 measures the current fluid consumption by presses 4 and its information enters the microprocessor 10. The current values of the fluid flow are summed up in the microprocessor 10, after which the number of pumps 3 is calculated to ensure specific load presses 4 and an additional number of pumps 3, which

The control system contains an accumulator that must be switched on or out of operation 1, consisting of one or several hydraulic and air cylinders, connected by a pressure line through a minimum level valve 2 to pumps 3, which inject fluid to presses 4 and

out of load.

When there is a shortage of fluid in the accumulator 1, the signal from sensors 8 through the microprocessor 10 sends a command to close the minimum valve 2, followed by discharge valves 5 and 5, confirms the activation of the electric actuators 6, the flow meter 7, the installation valves 5 and a signal is issued to

presses on the termination of the selection of liquid presses. After filling the accumulator 1 with liquid to the upper working level, the normal operation of the pumping and accumulator station is restored.

The economic effect of the implementation is achieved by increasing efficiency.

In the line between the pumps 3 and the presses 4, the sensors 8 for controlling the liquid level, mounted on the accumulator 1, the setting devices 9 of the average fluid flow rate, installed on the presses 4 and the microprocessor 10, the inputs of which are connected to the sensors 8, the setting devices 9 and flow meter 7, and the outputs - with valve 2 minimum level, with unloading valves 5 and electric drives 6 pumps 3. 25

The control system operates as follows.

The setpoint 9 of each press 4 sets the average fluid flow rate. The information from setters 9 enters microprocessor 10, where it is added up and the number of pumps 3 is calculated to ensure the required flow rate.

When the station is turned on, the microprocessor 10 in accordance with the algorithm

Claims (1)

Invention Formula The control system of the pump-accumulator station of hydraulic presses, containing a battery with sensors for controlling the level of liquid in the cylinder, is connected to a pressure line through a minimum valve to the input lines of the presses, pumps with electric drives and unloading valves connected to the pressure line in the section between the valve minimum level and presses, as well as electrical apparatus g- - g - - ji, j1 pump and accumulator control unit - to switch the valve of the minimum It affects the required number of actuators and unloading valves 5 pumps 3 and the valve 2 min. minimum. Pumps 3 are becoming under load. level and unloading valves, differing from the fact that, in order to increase efficiency by automatically turning on the optimal number of pumps, valve 2 of the minimum level of symity from liquid consumption by presses opens, the hydraulic cylinder of the 1st battery is equipped with a flow meter with electric valves 5, the pumps 3 begin to inject fluid into the pressure line to the presses 4, the flow meter 7 measures the current fluid consumption of the presses 4 and its information goes to the microprocessor 10. The current values of the fluid flow with microprocessor 10, then the number of pumps 3 is calculated to provide a specific load of presses 4 and an additional number of pumps 3, which  must be included in the work or the formula of the invention The control system of the pump-accumulator station of hydraulic presses, containing a battery with sensors for controlling the level of liquid in the cylinder, is connected to a pressure line through a minimum valve to the input lines of the presses, pumps with electric drives and unloading valves connected to the pressure line in the section between the valve minimum level and presses, as well as electrical apparatus I, J1 to switch the minimum valve level and discharge valves, differing from the fact that, in order to increase efficiency by automatically putting into operation the optimal number of pumps, connects to the pressure line that feeds the presses 4. If the presses 4 do not consume liquid or consume it less than the total capacity of the pumps 3 that are turned on under load, the fluid flow is pumped into the accumulator 1 to the upper operating level, then the signal sensors 8, the microprocessor 10 turns off the relief valves 5. When the liquid is further withdrawn by presses 4, the liquid level in the accumulator 1 is lowered and, according to the signal from sensors 8, the microprocessor 10 turns on the discharge The output of the average liquid consumption of each press and the microprocessor, while the flow meter is installed on the pressure line of the hydraulic excess cylinder, the outputs of the average liquid flow control sensors of the liquid level sensor and the flow meter are connected to the microprocess input50 Soil and the microprocessor output are connected to pump electric drives and electrical apparatus for switching the minimum level valve and pump unloading valves. 50 Soil and the microprocessor output are connected to pump electric drives and electrical apparatus for switching the minimum level valve and pump unloading valves. xy ten four