SU548678A1 - Device for controlling the press caliper - Google Patents

Description

one

This invention relates to an improvement in a device for controlling a press pulper used in the pulp and paper industry.

A device is known for controlling a press caliper, including its pumps and high and low pressure pipelines, and the hydraulic system for feeding the working parts of the press.

The main disadvantage of the known device lies in the fact that when the high pressure pump leaves the high pressure pump, the load on the electric motor of the choke racer is released to the power supply network.

The purpose of the invention is to ensure the continuity of the work of the grinder at the exit from the high pressure pump.

This is achieved in that the device comprises a check valve connecting high and low pressure pipelines, a control valve installed on the low pressure pipe, and a pressure sensor installed on the high pressure pipe, the outlet of the pressure sensor being connected to the inlet of the regulating valve.

The drawing shows the hydraulic circuit of the device for controlling the press grinder.

The high pressure pump (MOI) 1 is connected via a pressure switch 2, a check valve 3, a valve 4 and a pipeline 5 to a high pressure pipeline 6 to which the communication lines 7 of the pressure chambers of the pulper are connected.

The low pressure pump (LBD) 8 is connected via a check valve 9, a valve 10, a pipeline II, a pressure regulator 12 and a pipeline 13 to a low pressure pipeline 14 to which the communication lines 15 of the pressure chambers are connected.

Pipelines 5 and 11 are connected through a check valve 16.

The communication lines 7 and 15 are connected to the press chambers of the crusher through the distributor 17.

The device for controlling the press caliper operates as follows.

The working fluid from the NVD 1 through the check valve 3 and the valve 4 enters the pipeline 5 and the high pressure pipeline 6 and further through the communication line 7 to the pulverizer presses, and from LPD 8 the working fluid through the check valve 9, valve 10, pipeline 11, The torus 12 and the pipeline 13 enters the low pressure pipeline 14 and then through the communication lines 15 to the pulper presses. Through the check valve 16 working

liquid cannot go, because the pressure

generated NDI

less pressure generated by NVD I.

In the event of the failure of the NVD 1, the pressure in the pipelines 5 and 6 drops and a signal about it, for example, electrical, from the pressure sensor 2 is supplied to the pressure regulator 12, which creates an increased pressure in the area before it. NND 8 automatically goes to work in another mode with elevated pressure.

Since the pressure in pipelines 5 and 6 decreases, and increases in pipeline I, some of the liquid from LPD 8 will begin to flow into pipelines 5 and 6 through non-return valve 46. Thus, the load in the pressure chamber of the cooler will remain unchanged.

A device for controlling the press caliper can ensure continuity.

the work of one or a group of diverters connected to pipelines 6 and 14.

Claims (1)

Invention Formula A device for controlling the press heat bar, including its high and low pressure pumps and piping, and a hydraulic system supplying the working parts of the press, characterized in that, in order to ensure the continuity of the work of the beater at the exit of the high pressure pump, the device high and low pressure pipelines; a control valve installed on the low pressure pipe; and a pressure sensor installed on the high pressure pipe; the output sensor and the pressure is connected to the inlet of the regulating clan.