RO126753A2 - Process for selecting package-waste compacting mode, using a proportional hydraulic equipment with digital interface - Google Patents

Abstract

The invention relates to a process for selecting the waste compacting mode using a hydraulic equipment actuated by an electronic system, for selecting and displaying the working parameters. According to the invention, the process consists in selecting, by means of a selecting and displaying panel (12) some hydraulic pressure-flow rate parameters expressed as current or voltage and preset for the waste to be compacted, the selected parameters being then transmitted through an electronic system (11) to a hydraulic flow rates and pressures module comprising a pressure valve (7), a two-way flow rate regulator (8), a pressure relay (9) and a transducer subassembly (10) consisting of two relative pressure transducers and a flow rate transducer, the electronic system (11) being meant to compare the preset pressure with the pressure measured by the compacting-pressure transducer, the achieved/not achieved compaction degree of the waste to be compacted leading to switching/not switching to a higher pressure stage, subject to reaching a reference pressure, the electronic system being also able to switch it to a lower pressure stage using the flow rate regulator (8), the end of a pressing cycle being confirmed by an electric limiter (14) which stops the pressing cylinder (15) and controls the electronic system (11) as to store the pressure-flow rate parameters as reference data for a new working cycle with the same waste.

Description

PROCESS FOR SELECTING WASTE COMPACTION REGIMES FROM PACKAGING USING DIGITAL INTERFACE HYDRAULIC EQUIPMENT

The invention relates to a process for selecting the force and speed of waste compaction, by hydraulic working parameters (pressure, flow) depending on the material used (paper, cardboard, PET, plastic foil for compaction presses and hydraulic equipment). proportional modular, operated by an electronic system, from a panel for selecting and displaying the chosen working parameters.

The process is based on the use of a compaction press that can achieve a pressing force corresponding to a degree of compaction specific to each type of waste, for this purpose the electronic control system being adjusted for five pressures and three flow rates within the working range. The equipment starts working at a predetermined pressure and specific to each type of material, and if this proves, in the specific case of pressing to be insufficient for the waste used, the equipment has the possibility to move automatically, using a proportional hydraulic valve, to the next pressure stage, successively until the required degree of compaction is reached. In this case, the flow can move to a lower stage, to fit the power and adjustability characteristic of the press pi x Qj <N _ma x

The hydraulic equipment proportional to the digital interface can be mounted on any ordinary compacting press and which contains:

-a tank (recommended with sealed closure);

-a double oil filtration system

-an oil electric pump;

-a pressure valve for the protection of the hydraulic system;

- working cylinder for pressing provided with stroke limiters;

The field of applicability of the solutions of the invention is that of the construction of compacting presses of small or medium working capacity, which work indoors.

In connection with the process of choosing the working regimes for the waste compaction presses, the manual process and the semi-automatic process for selecting the working pressures and flows are known as variants, which have both the following disadvantages:

-the pressing process takes place only at the maximum safety pressure of the press;

-Pressure energy consumption is the same regardless of the type of waste material

In connection with the hydraulic equipment used for the application of processes, a multitude of variants are known which have as their general peculiarity the use of the defense ¹ f (Wl <& /

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(^ - 2 0 1 0 - 0 0 1 8 3 -2 3 -02- 2010 standard hydraulics, with analog or digital interfaces and which have as main disadvantage the lack of energy control during operation with the press.

Process for the selection of material regimes for the compaction of packaging waste according to the invention, according to the invention, removes the disadvantages of existing processes in that:

-the pressing process takes place at a pressure specific to each waste material, under the safety pressure of the press

-in these conditions the pressures and flows are no longer fixed, but correlated with each other on the same press.

- pressing occurs in better energy conditions and can be energetically controlled by the operator during work.

The process for selecting the compaction regimes according to the invention uses a hydraulic equipment proportional to the digital interface, consisting of the proportional hydraulic module, electronic control system, the panel for selecting and displaying the selected working parameters. This procedure has the following advantages:

-energetic improvement of the compaction process

- offers the possibility to extend the automation of the compaction process.

An embodiment of the invention is given below in connection with FIG. 1, which shows the structural and materialization scheme of the process for selecting on types of materials the working regimes for compacting packaging waste and Fig.2 which shows the scheme and component of the proportional hydraulic module, used in this process.

The proposed process of the invention is as follows:

- select from the selection and display panel (12) through the switches „P” and „Q” the preset hydraulic pressure-flow pressure parameters (pi, -Qj), i = l ... 5; j = 1..3, for a compacted waste, quantities expressed in current or voltage. The sizes of these parameters together with the maximum working pressure (pO) are digitally displayed on the panel.

-By pressing the ON / OFF button, the pressing cycle for the respective waste is started -The selected parameters are transmitted through the electronic system (11) to the proportional hydraulic module for flows and pressures consisting of: proportional pressure valve (7), which receives the electrical signals at the "P" selector and transforms them into hydraulic pressure quantities pi; the two-way flow regulator (8), proportionally transforms the electrical signals from the “Q” selector into hydraulic flow quantities Qj. the pressure relay (9) validates in the electronic system if the evolution of the pressure does not exceed the maximum working value (pO);

CV 2 0 1 0 - 0 0 1 8 3 -2 3 -02- 2010

-The variation of pressure and flow in the hydraulic system is controlled by the subassembly of transducers (10) consisting of two transducers of relative pressure Tp for pressures (pO) and (pi) and a flow transducer (differential pressure) TQ

The electronic system compares the preset pressure (pi) with that measured by the transducer that measures the pressing pressure (p _n ), and not realizing / achieving the degree of compaction for the waste in work produces switching / non-switching on the next pressure stage p; + i,

Switching / not switching to another pressure stage is conditioned by reaching the reference pressure (pi) at the transducer Tp, by touching / not touching the electric travel limiter (13) the electronic control and regulation system modifies the flow regulator setting, if necessary, at a lower stage Qj-i, using the adjustment function pxQ <N _max

The electric stroke limiter (14) confirms by touch the end of a pressing cycle, stopping the pressing cylinder (15) at the end of the stroke and controlling the electronic system memorizing the new pressure-flow parameters as reference data for a new duty cycle with the same waste.

The standard press commands can still be used for this waste

Pressing the “ON / OFF” button again on the operating mode selection panel allows the old parameters to be deleted from the electronic system and prepares the press for a new pressing cycle for a new waste.

The evolution of the pressure and flow parameters during the work is visualized on the digital interface of the equipment on the displays “po” “pn” and “Qn” corresponding to the transducers Tp and the transducer Qn.

Claims (2)

1- Procedure for selecting the compaction regimes of packaging waste, using hydraulic equipment proportional to the digital interface, characterized in that the selection of technological parameters, force and speed of pressing a waste is done by choosing from the selection and display panel ( 12) through the switches „P” and „Q” of the preset hydraulic pressure-flow pressure parameters for a compacting waste, quantities expressed in current or voltage, the quantities of these parameters together with the maximum working pressure being displayed on the panel; the selected parameters are transmitted through the electronic system (11) to the proportional hydraulic module for flows and pressures (6,7,8,9,10), the electronic system compares the preset pressure (pi) 'with that measured by the transducer that measures the pressing pressure, and failure to achieve / achieve the degree of compaction for the working waste causes switching / non-switching to the next pressure stage, switching / non-switching to another pressure stage is conditioned by reaching the reference pressure, by touching / not touching the electric travel limiter (13), the electronic system modifies the flow controller setting, if necessary, to a lower gear, using the pxQ ... N _max adjustment function; the electric travel limiter (14) confirms by touch the end of a pressing cycle, stopping the pressing cylinder (15) at the end of the stroke and controlling the electronic system memorizing the new pressure-flow parameters as reference data for a new working cycle with the same waste; the standard press commands can still be used for this waste; repeating the ON / OFF button ”from the operating mode selection panel, allows the deletion of the old parameters from the electronic system and prepares the press for a new pressing cycle for a new waste; the evolution of the pressure and flow parameters during the work is visualized on the digital interface of the equipment on the displays “po” “pn” and “Qn” corresponding to the transducers T _p .si Q _n . A method for selecting packaging compaction regimes using packaging equipment proportional to the digital interface according to claim 1, characterized in that it uses a proportional hydraulic module for flows and pressures consisting of: proportional pressure valve (7), the two-way flow regulator (8), the pressure relay (9) and the transducer subassembly (10) using two relative pressure transducers Tp and a flow transducer TQ.