CN110182497B - Full-load sensitive control scraper type garbage compressor control method and circuit - Google Patents

Full-load sensitive control scraper type garbage compressor control method and circuit Download PDF

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CN110182497B
CN110182497B CN201910469379.3A CN201910469379A CN110182497B CN 110182497 B CN110182497 B CN 110182497B CN 201910469379 A CN201910469379 A CN 201910469379A CN 110182497 B CN110182497 B CN 110182497B
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scraper
pressure
hopper
sliding plate
equal
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CN110182497A (en
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王果年
廖建红
廖震寰
夏中正
何志强
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Hunan Xiangyi Environmental Technology Co ltd
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Changsha Xiangyi Machinery Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/26—Programme control arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65F—GATHERING OR REMOVAL OF DOMESTIC OR LIKE REFUSE
    • B65F9/00—Transferring of refuse between vehicles or containers with intermediate storage or pressing

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  • Mechanical Engineering (AREA)
  • Refuse-Collection Vehicles (AREA)

Abstract

The invention relates to the technical field of garbage treatment, and discloses a full-load sensitive control method and a full-load sensitive control circuit for a scraper type garbage compressor. A control method of a full-load-sensitive control scraper type garbage compressor is characterized by comprising the following steps: s1: starting up and weighing; s2: weighing and setting; s3: self-checking the temperature; s4: self-checking the pressure; s5: detecting in situ; s6: compressing the working state, and selecting a manual state or an automatic state; s7: after the compression is completed, the feed enters the box for storage, and the process proceeds to step S1. The invention provides a control method and a control circuit of a garbage compressor, which integrate weighing, temperature and pressure proportional control and have manual and automatic control method selection, thereby achieving good effects of energy saving and overpressure protection.

Description

Full-load sensitive control scraper type garbage compressor control method and circuit
Technical Field
The invention relates to the technical field of garbage treatment, in particular to a full-load sensitive control method and a full-load sensitive control circuit for a scraper type garbage compressor.
Background
The garbage compressor is one of main equipment for realizing garbage compression and volume reduction, and is important equipment of a garbage transfer station. At present, the garbage compressor is mainly divided into two types, namely a fixed type and a movable type.
In the prior art, the existing integral movable scraper type garbage compressor on the market is basically not provided with a weight weighing device in the garbage compressing process. When the garbage compressor is fully pressed with garbage and is loaded and transported by a hook wall vehicle, the total weight of the garbage compressor is limited due to the requirement of the total weight limit of the vehicle transportation. Because the mobile scraper type garbage compressor is short of an effective weighing device, the total weight of the vehicle and the garbage compressor filled with garbage cannot be accurately determined, so that in actual operation, garbage is mostly filled less, and the excessive amount of compressed garbage is avoided.
Secondly, the existing integral movable scraper type garbage compressor does not have a load sensitive control function, high-pressure hydraulic oil provided by a hydraulic pump can only overflow through a fixed overflow valve, and the pressure of a hydraulic system cannot be adjusted in real time according to the actual working load condition in the garbage compression process, so that energy waste is caused. Thirdly, as the existing integral moving scraper type garbage compressor does not have the function of load sensitive control, in order to meet the requirement of automatic control, a travel switch or a proximity switch is required to be arranged on an electric control system so as to provide information of relevant actions in place; however, since the garbage compressor works in a humid, acid-base and frequent vibration environment, the travel switch or the proximity switch is easy to malfunction.
Disclosure of Invention
The invention aims to solve the technical problem of providing a full-load sensitive control method and a full-load sensitive control circuit for a scraper type garbage compressor, aiming at the defects in the prior art.
The purpose of the invention is realized by the following technical scheme:
a control method of a full-load-sensitive control scraper type garbage compressor comprises the following steps:
s1: starting the garbage compressor and weighing, wherein the garbage compressor weighing device starts to measure the total weight G of the garbage compressor;
s2: weighing, setting the limiting weight G by the operator through the consoleLimit ofAnd correspondingly adjusting according to the measurement result;
s3: the temperature self-checking comprises the temperature detection of oil in the oil tank, the corresponding adjustment is carried out according to the detection result, and then the hydraulic pump motor is started;
s4: the method comprises the steps of performing pressure self-detection, wherein the hydraulic pump motor enters a starting state, performing pressure test inside a hydraulic system, and automatically judging whether to enter an in-situ detection program according to a detection result;
s5: in-situ detection, which comprises hopper position detection and sliding plate position detection, controls the positions of a hopper and a sliding plate of the garbage compressor according to the detection result, and then enters a compression working state;
s6: compressing the working state, selecting a manual state or an automatic state, and compressing the garbage;
s7: after the compression is completed, the feed enters the box for storage, and the process proceeds to step S1.
Further, the weighing device consists of a weighing sensor; the weighing sensor is arranged between the top of each wheel and the bottom of the box body; the bottom of the weighing sensor is fixed on the top of the support frame of the wheel through a bolt.
Furthermore, the weighing device is connected with a control center of the garbage compressor through a transmission cable; the control center is provided with a data processing and transmitting unit; the data processing and transmitting unit comprises an amplifier module and an A/D conversion module, and is used for amplifying the weight signal transmitted by the weighing device and carrying out digital processing on the weight signal.
Further, the step S3 includes:
s8: when the temperature of the hydraulic oil is less than 5 ℃, the hydraulic oil heater works, and when the temperature rises to T which is more than or equal to 5 ℃, the step S4 is carried out;
s9: when the temperature T is more than or equal to 5 ℃ and less than or equal to 35 ℃, the step S4 is carried out;
s10: when the temperature T is more than or equal to 35 ℃ and less than or equal to 65 ℃, the hydraulic radiator starts to work to forcibly radiate the hydraulic oil, and the system enters step S4;
s11: when the temperature T is more than 65 ℃, stopping the machine in an overtemperature way.
Further, the step S4 includes:
s11: when the internal pressure P of the hydraulic system is more than or equal to 18MPa, the whole garbage compressor is stopped at overpressure;
s12: when the internal pressure P of the hydraulic system is less than 18MPa, the equipment enters an in-situ detection procedure.
Further, the step S6 selects to enter a manual state, which includes:
s13: manually controlling the scraper to rise, and automatically setting a pressure limit value P5 to be 6.5MPa by the system; whether the scraper is controlled to descend or not can be selected, and when the scraper is selected to descend, the operation goes to step S14; otherwise, go to step S16;
s14: controlling the scraper to descend, and setting a pressure limit value P7 to 16.5MPa by the system; whether the scraper is controlled to ascend or not can be selected, and when the scraper is selected to ascend, the operation goes to step S13; otherwise, go to step S15;
s15: when the scraper is lowered to the lowest position, the system monitors the pressure P8 of the scraper hydraulic cylinder in real time; when P8 is more than or equal to 16MPa, the scraper is judged to be at the lower position, the scraper is automatically stopped, and the step S18 is carried out;
s16: when the scraper rises to the highest position, the system monitors the pressure P6 of the hydraulic cylinder of the scraper in real time; when P6 is more than or equal to 6MPa, the scraper is judged to be at the upper position, the scraper automatically stops, and the step S17 is entered;
s17: manually controlling the sliding plate to descend, and automatically setting a pressure limit value P9 to be 10.5MPa by the system; whether the slide plate is controlled to ascend or not can be selected, and the step is S18 when the slide plate is selected to ascend, otherwise, the step is S20;
s18: controlling the slide plate to ascend, and automatically setting a pressure limit value P3 to be 16.5MPa by the system; whether the sliding plate is controlled to descend or not can be selected, and when descending is selected, the operation goes to step S17; otherwise, go to step S19;
s19: when the sliding plate rises to the highest position, the system monitors the pressure P4 of the hydraulic cylinder of the sliding plate in real time; when P4 is more than or equal to 16MPa, the sliding plate is judged to be in the upper position and automatically stopped; whether the hopper is controlled to ascend or not can be selected, and when the hopper is selected to ascend, the process goes to step S21; otherwise, go to step S1;
s20: when the slide plate descends to the lowest position, the system monitors the pressure P10 of the hydraulic cylinder of the scraper in real time; when P10 is more than or equal to 10MPa, the sliding plate is judged to be at the lower position, the sliding plate is automatically stopped, and the step S14 is carried out;
when the operator controls the squeegee to be in the lower position and the slide plate to be in the upper position, the flow proceeds to step S21,
s21: the worker controls the hopper to ascend, and automatically sets a pressure limit value P11 to be 7.5 MPa; whether the hopper is controlled to descend or ascend or not can be selected, and when the hopper is selected to descend, the step S22 is executed, otherwise, the step S24 is executed;
s22: controlling the hopper to descend, and automatically setting a pressure limit value P1 to be 8.5MPa by the system; the hopper is selectively lifted up by selecting whether or not to control the lifting up of the hopper, and the process proceeds to step S21. Otherwise, go to step S23;
s23: when the hopper descends to the lowest position, the system monitors the pressure P2 of the hydraulic cylinder of the sliding plate in real time; when the P2 is more than or equal to 8MPa, the hopper is judged to be at the lower position and automatically stopped;
s24: when the hopper rises to the highest position, the system monitors the pressure P12 of the hydraulic cylinder of the hopper in real time; when P12 is more than or equal to 7MPa, judging that the hopper is at the upper position, and stopping compressing the garbage; automatically proceed to step S25;
s25: the system automatically enters a hydraulic high-pressure oil pipe pressure relief program; then loading and transporting.
Further, the step S6 selects to enter an automatic state, which includes:
s26: the system controls the scraper to rise, and automatically sets a pressure limit value P5 to be 6.5 MPa; when the scraper rises to the highest position, the system monitors the pressure P6 of the hydraulic cylinder of the scraper in real time; when P6 is greater than or equal to 6MPa, the process goes to step S27;
s27: the system controls the sliding plate to descend, and automatically sets a pressure limit value P9 to be 10.5 MPa; when the sliding plate descends to the lowest position, the system monitors the pressure P10 of the hydraulic cylinder of the sliding plate in real time; when P10 is more than or equal to 10MPa, the process goes to step S28;
s28: the system controls the scraper to descend, and automatically sets a pressure limit value P7 to be 16.5 MPa; when the scraper is lowered to the lowest position, the system monitors the pressure P8 of the scraper hydraulic cylinder in real time; when P8 is more than or equal to 16MPa, the process goes to step S29;
s29: the system controls the sliding plate to ascend, and automatically sets a pressure limit value P3 to be 16.5 MPa; when the sliding plate rises to the highest position, the system monitors the pressure P4 of the hydraulic cylinder of the sliding plate in real time; when P4 is more than or equal to 16MPa, the sliding plate is judged to be in the upper position and automatically stopped; whether the hopper is controlled to ascend or not can be selected, and when the hopper is selected to ascend, the process goes to step S21; otherwise, the process proceeds to step S1.
Further, the full-load sensitive control scraper garbage compressor circuit comprises an oil inlet control unit and an oil return control unit; the oil inlet control unit comprises an oil tank, an oil inlet filter, a hydraulic oil pump, a motor for a hydraulic oil pump, a one-way valve and a high-pressure oil filter which are sequentially connected along an oil inlet route of the hydraulic cylinder; the oil inlet control unit is respectively connected to oil inlets of the hopper hydraulic cylinder, the sliding plate hydraulic cylinder and the scraper hydraulic cylinder through a reversing valve and a bidirectional hydraulic lock; a double one-way throttle valve is arranged between the hydraulic cylinder of the control scraper, the oil inlet and outlet of the hydraulic cylinder of the control hopper and the two-way hydraulic lock;
the oil return control unit comprises an oil return filter and an oil tank which are sequentially connected along an oil return route, and further comprises an air filter, an oil pointer, a hydraulic oil heater, a temperature transmitter and a radiator, wherein the air filter, the oil pointer, the hydraulic oil heater and the temperature transmitter are respectively connected with the oil tank, and the radiator is connected with the oil return filter.
Further, a proportional overflow valve and a pressure transmitter are connected between the oil inlet control unit and the oil return control unit; the proportional overflow valve, the pressure transmitter and the electric control system achieve the purpose of closed-loop control.
Furthermore, a quick-change connector with a one-way valve is arranged between the high-pressure oil filter and the oil tank; an oil inlet of a radiator of the oil return control unit is connected with a quick-change connector of a one-way valve; and a reversing valve is connected between the two quick change connectors in parallel.
Compared with the prior art, the invention has the following beneficial effects:
(1) the full-load sensitive control scraper type garbage compressor control method and circuit are internally provided with the automatic weighing device, and the garbage compressor can monitor the working weight of the compressor in real time in a working state, so that the maximum quantification of the work of the garbage compressor is ensured, and the excessive compression of the garbage compressor is prevented.
(2) The control circuit of the invention has no travel switch or proximity switch, and the hydraulic pressure load sensitivity is used as the core for triggering the whole control circuit, thereby effectively avoiding the failure probability of the travel switch or proximity switch during working in humid, acid-base and frequent vibration environments.
(3) Meanwhile, the garbage compressor is provided with two sets of manual and automatic operation systems, and a proper operation mode can be selected according to actual needs; according to the invention, the weight, pressure and temperature monitoring are controlled by adopting a PLC (programmable logic controller) automatic program, so that the next operation of the garbage compressor can be automatically judged in time, the operation is rapid and accurate, the service life of the garbage compressor is ensured, and resources are fully utilized.
Drawings
FIG. 1 is a schematic view showing a configuration of a garbage compactor according to embodiment 1;
FIG. 2 is a schematic view of a weighing apparatus of the trash compactor of embodiment 1;
FIG. 3 is a circuit diagram of a control circuit of a full-load-sensitive control scraper type garbage compressor in embodiment 1;
fig. 4 is a schematic view of the normal control flow of the main program of the full-load-sensitive controlled scraper type garbage compressor in example 1.
Detailed Description
The present invention will be further described with reference to the following embodiments. Wherein the showings are for the purpose of illustration only and are shown by way of illustration only and not in actual form, and are not to be construed as limiting the present patent; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
Example 1
As shown in FIG. 1, the scraper type garbage compressor comprises a scraper 51, a sliding plate 52, a hopper 53 and a box body 54, wherein the scraper 51 is arranged at the front end of a feed inlet of the garbage compressor; the sliding plate 52 is connected with the scraper 53, the hopper 53 is arranged below the scraper 51 and the sliding plate 52, the scraper 51, the sliding plate 52 and the hopper 53 form a front working area of the garbage compressor, and the box body 54 is fixedly arranged behind the working area and is used as a garbage storage area of the garbage compressor.
This scraper blade rubbish compressor wholly adopts PLC control system, and as its automated operation's core system, is equipped with three kinds of parameters of weight, pressure, temperature in the system and judges the system of rubbish compressor whole work to and the operation requirement.
As shown in fig. 4, the control method of the full-load-sensitive controlled scraper type garbage compressor of the present invention comprises the steps of:
s1: starting the garbage compressor and weighing, wherein the garbage compressor weighing device starts to measure the total weight G of the garbage compressor;
s2: weighing, setting the limiting weight G by the operator through the consoleLimit ofAnd correspondingly adjusting according to the measurement result;
s3: the temperature self-checking comprises the temperature detection of oil in the oil tank, the corresponding adjustment is carried out according to the detection result, and then the hydraulic pump motor is started;
s4: the hydraulic pump motor enters a starting state, the internal pressure of the hydraulic system is detected, and whether an in-situ detection program is entered or not is automatically judged according to a detection result; the hydraulic system is the internal pressure of each hydraulic cylinder working cavity in the garbage compressor.
S5: and in-situ detection, which comprises hopper position detection and sliding plate position detection, controls the positions of the hopper and the sliding plate of the garbage compressor according to the detection result, and then enters a compression working state.
S6: compressing the working state, selecting a manual state or an automatic state, and compressing the garbage;
s7: after the compression is completed, the feed enters the box for storage, and the process proceeds to step S1.
In the above steps S1 and S2, the garbage compressor needs to measure the weight before and after loading the garbage compressor by using the weighing device. As shown in fig. 2, the weighing device is composed of a load cell 2; the weighing sensor 2 is arranged between the top of each wheel 1 and the bottom of the box body; the bottom of the load cell 2 is fixed to the top of the support frame of the wheel by bolts 201. The weighing device is connected with the control center of the garbage compressor through a cable; the controlThe system center is provided with a data processing and transmitting unit; the data processing and transmitting unit comprises an amplifier module and an A/D conversion module, and is used for amplifying the weight signal transmitted by the weighing device and carrying out digital processing on the weight signal. For example, the garbage compressor is powered on, the sensor of the weighing device amplifies and digitizes the measured weight signal through the amplifier module and the A/D conversion module, adds the weight signals G1, G2, G3 and G4 obtained after loading to obtain the total weight signal G, and sets the limit weight GLimit ofMaking a comparison when G is less than GLimit ofWhen so, the system proceeds to step S3; when G > GLimit ofAnd the system controls the hopper to return to the original position, and the overweight garbage is moved out by the staff, so that the danger caused by compression is avoided.
Upon completion of the weight measurement, the process proceeds to step S3, and step S3 includes:
s8: when the temperature of the hydraulic oil is less than 5 ℃, the hydraulic oil heater works, and when the temperature rises to T which is more than or equal to 5 ℃, the step S4 is carried out;
s9: when the temperature T is more than or equal to 5 ℃ and less than or equal to 35 ℃, the step S4 is carried out;
s10: when the temperature T is more than or equal to 35 ℃ and less than or equal to 65 ℃, the hydraulic radiator starts to work to forcibly radiate the hydraulic oil, and the system enters step S4;
s11: when the temperature T is more than 65 ℃, stopping the machine in an overtemperature way.
When step S3 is completed, the system proceeds to step S4 for pressure self-check: step S4 includes:
s11: when the internal pressure P of the hydraulic system is more than or equal to 18MPa, the whole garbage compressor is stopped at overpressure;
s12: when the internal pressure P of the hydraulic system is less than 18MPa, the equipment enters an in-situ detection procedure.
When the system enters the step S5 for in-situ detection, the control system carries out in-situ detection on whether the hopper is in the lower position and the sliding plate is in the upper position; the method comprises the following steps:
when the hopper is not positioned at the lower position, the PLC control system of the garbage compressor controls the hydraulic cylinder of the hopper to work and controls the hopper to rotate anticlockwise to the lower position; in the process of anticlockwise rotation of the hopper, the system monitors the pressure of the hydraulic cylinder of the hopper in real time, controls the pressure P2 to be within a range of less than or equal to 10MPa, and automatically stops working if the real-time pressure value of the hopper exceeds P2.
And after the hopper is positioned at the lower position, the system starts to detect the position of the sliding plate, if the sliding plate is not positioned at the upper position, the control system controls the hydraulic cylinder of the sliding plate to work, controls the sliding plate to move upwards to the upper position, monitors the pressure of the hydraulic cylinder of the sliding plate in real time, controls the pressure P4 to be within the range of less than or equal to 18MPa, and automatically stops working if the real-time pressure value of the sliding plate exceeds P4.
And (5) after the system finishes the in-situ detection of the hopper and the sliding plate on the garbage compressor, the system enters a step S6 to compress working states, wherein the compressing working states comprise a manual state and an automatic state. The compression working state of the garbage compressor is automatically selected by an operator according to the actual working condition.
The manual state includes:
s13: the operator firstly controls the scraper to ascend at the operation platform, and at the moment, the control system automatically reads a pressure limit value P5 preset in the PLC system to be 6.5MPa as a limit protection value for the scraper ascending operation.
During the ascending process, the operator can select whether to control the scraper to descend at any time, and when the scraper selects to descend, the operation goes to step S14, otherwise, the operation goes to step S16.
S14: the control system controls the scraper to descend and automatically reads a pressure limit value P7 which is preset in a PLC system and is 16.5 MPa.
During the descending process, the operator can select whether to control the rise of the scraper at any time, and when the scraper selects the rise, the operation goes to step S13. Otherwise, the process proceeds to step S15.
S15: when the scraper descends to the lowest position, the system starts to monitor the pressure P8 of the hydraulic cylinder of the scraper in real time; when the P8 is more than or equal to 16MPa, the control system automatically determines that the scraper is at the lower position, automatically stops, and goes to step S18; when the pressure P8 of the monitoring hydraulic cylinder is more than or equal to 18MPa in the descending process of the scraper, the system is automatically stopped, and an alarm is given.
S16: when the scraper rises to the highest position, the system starts to monitor the pressure P6 of the hydraulic cylinder of the scraper in real time; when the pressure P6 is more than or equal to 6MPa, the control system automatically determines that the scraper is at the upper position, automatically stops, and goes to step S17; in the process of descending the scraper, if the pressure P6 of the monitoring hydraulic cylinder is more than or equal to 8MPa, the system is automatically stopped, and an alarm is given.
S17: the operator controls the sliding plate to descend on the operating platform, and at the moment, the control system automatically reads a pressure limit value P9 which is preset in the PLC system and is 10.5MPa as a limit protection value for the sliding plate descending operation.
During the descending process, the operator can select whether to control the slide plate to ascend at any time, and when the slide plate is selected to ascend, the process goes to step S18, otherwise, the process goes to step S20.
S18: the control system controls the sliding plate to ascend, and automatically reads a preset pressure limit value P3 which is preset in the PLC system and is 16.5 MPa.
During the ascending process of the slide plate, the operator can select whether to control the descending of the slide plate at any time, and when the slide plate is selected to descend, the operation goes to step S17. Otherwise, the process proceeds to step S19.
S19: when the sliding plate rises to the highest position, the system starts to monitor the pressure P4 of the hydraulic cylinder of the sliding plate in real time; when P4 is more than or equal to 16MPa, the control system automatically determines that the sliding plate is at the upper position and automatically stops; whether or not to control the hopper to ascend is selected, and when the hopper is selected to ascend, the process proceeds to step S21. Otherwise, go to step S1; when the pressure P4 of the monitoring hydraulic cylinder is more than or equal to 18MPa in the ascending process of the sliding plate, the system is automatically stopped, and an alarm is given.
S20: when the slide plate descends to the lowest position, the system starts to monitor the pressure P10 of the hydraulic cylinder of the scraper in real time; when the P10 is more than or equal to 10MPa, the control system automatically determines that the sliding plate is at the lower position, automatically stops, and goes to step S14; in the process of descending the sliding plate, if the pressure P10 of the monitoring hydraulic cylinder is more than or equal to 12MPa, the system is automatically stopped, and an alarm is given.
In the above manual state, the manual normal procedures of the garbage compressor are as follows in sequence: the scraper is lifted, the sliding plate is lowered, the scraper is lowered, and the sliding plate is lifted. The steps are S13, S16, S17, S20, S14, S15, S18 and S19 in sequence. Thus, the cycle is repeated.
When the scraper is controlled to be positioned at the lower position by an operator and the sliding plate is positioned at the upper position, the hopper can enter the upper position and the lower position to rotate, so that equipment is not damaged due to misoperation, and when workers are not on site, other people are not allowed to dump garbage.
When the operator controls the squeegee to be in the lower position and the slide plate to be in the upper position, the flow proceeds to step S21,
s21: the operator controls the hopper to ascend at the operation platform, and at the moment, the control system automatically reads a pressure limit value P11 which is preset in the PLC system and is 7.5MPa as a limit protection value for the hopper ascending operation.
During the process of the hopper ascending, the operator can select whether to control the hopper to descend at any time, and when the hopper selects to descend, the process goes to step S22, otherwise, the process goes to step S24.
S22: the control system controls the hopper to descend and automatically reads a preset pressure limit value P1 which is preset in the PLC system and is 8.5 MPa.
During the lowering of the hopper, the operator can select whether to control the raising of the hopper at any time, and when the raising of the hopper is selected, the flow proceeds to step S21. Otherwise, the process proceeds to step S23.
S23: when the hopper descends to the lowest position, the system starts to monitor the pressure P2 of the hydraulic cylinder of the hopper in real time; when the P2 is more than or equal to 8MPa, the control system automatically determines that the hopper is at the lower position and automatically stops; in the process of hopper descending, if the pressure P2 of the monitoring hydraulic cylinder is more than or equal to 10MPa, the system is automatically stopped, and an alarm is given.
S24: when the hopper rises to the highest position, the system starts to monitor the pressure P12 of the hydraulic cylinder of the hopper in real time; when P12 is more than or equal to 7MPa, the control system automatically determines that the hopper is at the upper position, automatically stops and stops compressing the garbage; and in the process of ascending the hopper, if the pressure P12 of the monitoring hydraulic cylinder is more than or equal to 9MPa, the system is automatically stopped, and an alarm is given.
When the system judges that the hopper is at the upper position, after the time delay is 1S, the system automatically enters the step S25,
s25: the system automatically enters a hydraulic high-pressure oil pipe pressure relief program to perform oil return pressure relief on high-pressure oil remained in the oil pipe, so that the unsmooth connection caused by the residual high pressure inside the hydraulic oil pipe during connection is prevented.
The invention relates to a control method of a full-load sensitive control scraper type garbage compressor, which comprises the following steps of:
s26: the system controls the scraper to ascend and automatically reads a pressure limit value P5 which is preset in a PLC system and 6.5MPa as a limit protection value of the scraper ascending operation,
in the process of lifting the scraper, the system can monitor the pressure P6 of the hydraulic cylinder of the scraper in real time; when P6 is more than or equal to 8MPa, the system is automatically stopped and an alarm is given. When the scraper rises to the highest position, the system can monitor the pressure P6 of the hydraulic cylinder of the scraper in real time; when P6 is 6MPa or more, the process proceeds to step S27.
S27: the system controls the sliding plate to descend and automatically reads a pressure limit value P9 which is preset in a PLC system and is 10.5MPa as a limit protection value of the sliding plate descending operation,
in the process of descending the sliding plate, the system can monitor the pressure P10 of the hydraulic cylinder of the sliding plate in real time; when P10 is more than or equal to 12MPa, the system is automatically stopped and an alarm is given. When the slide plate descends to the lowest position, the system monitors the pressure P10 of the hydraulic cylinder of the scraper in real time; when P10 is 10MPa or more, the process proceeds to step S28.
S28: the system controls the scraper to descend and automatically reads a pressure limit value P7 which is preset in a PLC system and is 16.5MPa as a limit protection value of the scraper descending operation,
in the process of descending the scraper, the system can monitor the pressure P8 of the hydraulic cylinder of the scraper in real time; when P8 is more than or equal to 18MPa, the system is automatically stopped and an alarm is given. When the scraper descends to the lowest position, the system monitors the pressure P8 of the scraper hydraulic cylinder in real time; when P8 is equal to or greater than 16MPa, the process proceeds to step S29.
S29: the system controls the sliding plate to ascend and automatically reads a pressure limit value P3 which is preset in a PLC system and is 16.5MPa as a limit protection value of the sliding plate ascending operation,
in the process of lifting the sliding plate, the system can monitor the pressure P4 of the hydraulic cylinder of the sliding plate in real time; when P4 is more than or equal to 18MPa, the system is automatically stopped and an alarm is given. When the sliding plate rises to the highest position, the system can monitor the pressure P4 of the hydraulic cylinder of the sliding plate in real time; when P4 is more than or equal to 16MPa, the sliding plate is judged to be in the upper position and automatically stopped; whether or not to control the hopper to ascend is selected, and when the hopper is selected to ascend, the process proceeds to step S21. Otherwise, the process proceeds to step S1.
As shown in fig. 3, the full-load sensitive control scraper garbage compressor circuit of the present invention includes an oil inlet control unit and an oil return control unit; the oil inlet control unit comprises an oil tank 401, an oil inlet filter 402, a hydraulic oil pump 404, a motor 403 for the hydraulic oil pump, a one-way valve 405 and a high-pressure oil filter 413 which are sequentially connected along an oil inlet route of the hydraulic cylinder; the oil inlet control unit is connected to oil inlets of a hopper hydraulic cylinder 419, a sliding plate hydraulic cylinder 422 and a scraper hydraulic cylinder 426 through a reversing valve 416 and a bidirectional hydraulic lock 417 respectively; double one- way throttle valves 418 and 425 are arranged between oil inlets of the hydraulic cylinders 419 and 426 and the two-way hydraulic locks 417 and 424.
The oil return control unit comprises an oil return filter 410 and an oil tank 401 which are sequentially connected along an oil return route, and further comprises an air filter 427, an oil pointer 428, a hydraulic oil heater 429, a temperature transmitter 430 and a radiator 409 which are respectively connected with the oil return filter 410.
A proportional overflow valve 408 and a pressure transmitter 407 are connected between the oil inlet control unit and the oil return control unit; the proportional relief valve 408, the pressure transmitter 407 and the electrical control system achieve the purpose of closed-loop control.
A quick-change connector 411 with a one-way valve is arranged between the high-pressure oil filter 413 and the one-way valve 405; an oil inlet of a radiator 409 of the oil return control unit is connected with a quick-change connector 412 of a one-way valve; and a reversing valve 415 is connected in parallel between the two quick change connectors 411 and 412.
According to the full-load sensitive control scraper type garbage compressor control circuit, the proportional overflow valve 408 and the pressure transmitter 407 are arranged, and the automatic control of a control system is matched, so that the pressure proportional closed-loop control of hydraulic cylinders of the scraper 51, the sliding plate 52 and the hopper 53 is realized, and the energy saving and overpressure protection are achieved. Meanwhile, a hydraulic oil heater 429 is arranged in a system circuit, so that the hydraulic oil in the hydraulic control system of the garbage compressor can be heated normally in winter, and meanwhile, the radiator 409 also ensures the temperature stability of the garbage compressor.
It should be understood that the above examples are only for clearly illustrating the technical solutions of the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (5)

1. A control method of a full-load-sensitive control scraper type garbage compressor is characterized by comprising the following steps:
s1: starting the garbage compressor and weighing, wherein the garbage compressor weighing device starts to measure the total weight G of the garbage compressor;
s2: weighing, setting the limiting weight G by the operator through the consoleLimit ofAnd correspondingly adjusting according to the measurement result;
s3: the temperature self-checking comprises the temperature detection of oil in the oil tank, the corresponding adjustment is carried out according to the detection result, and then the hydraulic pump motor is started;
s4: the method comprises the steps of performing pressure self-detection, wherein the hydraulic pump motor enters a starting state, performing pressure test inside a hydraulic system, and automatically judging whether to enter an in-situ detection program according to a detection result;
s5: in-situ detection, which comprises hopper position detection and sliding plate position detection, controls the positions of a hopper and a sliding plate of the garbage compressor according to the detection result, and then enters a compression working state;
s6: compressing the working state, selecting a manual state or an automatic state, and compressing the garbage;
s7: after the compression is finished, feeding the materials into a box body for storage, and performing step S1;
step S6 selects entering a manual state, which includes:
s13: manually controlling the scraper to rise, and automatically setting a pressure limit value P5 to be 6.5MPa by the system; and whether the scraper is controlled to descend is selected, and when the scraper is selected to descend, the operation goes to step S14; otherwise, go to step S16;
s14: controlling the scraper to descend, and setting a pressure limit value P7 to 16.5MPa by the system; and selects whether to control the rise of the scraper, and when the scraper selects the rise, the flow goes to step S13; otherwise, go to step S15;
s15: when the scraper is lowered to the lowest position, the system monitors the pressure P8 of the scraper hydraulic cylinder in real time; when P8 is more than or equal to 16MPa, the scraper is judged to be at the lower position, the scraper is automatically stopped, and the step S18 is carried out;
s16: when the scraper rises to the highest position, the system monitors the pressure P6 of the hydraulic cylinder of the scraper in real time; when P6 is more than or equal to 6MPa, the scraper is judged to be at the upper position, the scraper automatically stops, and the step S17 is entered;
s17: manually controlling the sliding plate to descend, and automatically setting a pressure limit value P9 to be 10.5MPa by the system; and whether the slide plate is controlled to ascend or not is selected, and when the slide plate is selected to ascend, the step is S18, otherwise, the step is S20;
s18: controlling the slide plate to ascend, and automatically setting a pressure limit value P3 to be 16.5MPa by the system; and whether the sliding plate is controlled to descend is selected, and when the sliding plate descends, the operation goes to step S17; otherwise, go to step S19;
s19: when the sliding plate rises to the highest position, the system monitors the pressure P4 of the hydraulic cylinder of the sliding plate in real time; when P4 is more than or equal to 16MPa, the sliding plate is judged to be in the upper position and automatically stopped; and selects whether to control the hopper to ascend, and when the hopper is selected to ascend, the flow goes to step S21; otherwise, go to step S1;
s20: when the sliding plate descends to the lowest position, the system monitors the pressure P10 of the hydraulic cylinder of the sliding plate in real time; when P10 is more than or equal to 10MPa, the sliding plate is judged to be at the lower position, the sliding plate is automatically stopped, and the step S14 is carried out;
when the operator controls the squeegee to be in the lower position and the slide plate to be in the upper position, the flow proceeds to step S21,
s21: the worker controls the hopper to ascend, and automatically sets a pressure limit value P11 to be 7.5 MPa; whether the hopper is controlled to descend is selected, and if the hopper is selected to descend, the step S22 is executed, otherwise, the step S24 is executed;
s22: controlling the hopper to descend, and automatically setting a pressure limit value P1 to be 8.5MPa by the system; selecting whether to control the hopper to ascend or not, selecting the hopper to ascend, and entering the step S21, otherwise, entering the step S23;
s23: when the hopper is lowered to the lowest position, the system monitors the pressure P2 of the hydraulic cylinder of the hopper in real time; when the P2 is more than or equal to 8MPa, the hopper is judged to be at the lower position and automatically stopped;
s24: when the hopper rises to the highest position, the system monitors the pressure P12 of the hydraulic cylinder of the hopper in real time; when P12 is more than or equal to 7MPa, judging that the hopper is at the upper position, and stopping compressing the garbage; automatically proceed to step S25;
s25: the system automatically enters a hydraulic high-pressure oil pipe pressure relief program; then loading and transporting;
step S6 selects entry into an automatic state, which includes:
s26: the system controls the scraper to rise, and automatically sets a pressure limit value P5 to be 6.5 MPa; when the scraper rises to the highest position, the system monitors the pressure P6 of the hydraulic cylinder of the scraper in real time; when P6 is greater than or equal to 6MPa, the process goes to step S27;
s27: the system controls the sliding plate to descend, and automatically sets a pressure limit value P9 to be 10.5 MPa; when the sliding plate descends to the lowest position, the system monitors the pressure P10 of the hydraulic cylinder of the sliding plate in real time; when P10 is more than or equal to 10MPa, the process goes to step S28;
s28: the system controls the scraper to descend, and automatically sets a pressure limit value P7 to be 16.5 MPa; when the scraper is lowered to the lowest position, the system monitors the pressure P8 of the scraper hydraulic cylinder in real time; when P8 is more than or equal to 16MPa, the process goes to step S29;
s29: the system controls the sliding plate to ascend, and automatically sets a pressure limit value P3 to be 16.5 MPa; when the sliding plate rises to the highest position, the system monitors the pressure P4 of the hydraulic cylinder of the sliding plate in real time; when P4 is more than or equal to 16MPa, the sliding plate is judged to be in the upper position and automatically stopped; and selects whether to control the hopper to ascend, and when the hopper is selected to ascend, the flow goes to step S21; otherwise, the process proceeds to step S1.
2. The method for controlling the scraper refuse compressor with full load sensitive control according to claim 1, characterized in that the weighing device is composed of a weighing sensor; the weighing sensor is arranged between the top of each wheel and the bottom of the box body; the bottom of the weighing sensor is fixed on the top of the support frame of the wheel through a bolt.
3. The control method of the scraper type garbage compressor with full load sensitive control according to claim 2, characterized in that the weighing device is connected with the control center of the garbage compressor through a transmission cable; the control center is provided with a data processing and transmitting unit; the data processing and transmitting unit comprises an amplifier module and an A/D conversion module, and is used for amplifying the weight signal transmitted by the weighing device and carrying out digital processing on the weight signal.
4. The method for controlling the scraper type garbage compressor with full load sensitivity control according to claim 1, wherein the step S3 comprises:
s8: when the temperature of the hydraulic oil is less than 5 ℃, the hydraulic oil heater works;
s9: when the temperature T is more than or equal to 5 ℃ and less than or equal to 35 ℃, the step S4 is carried out;
s10: when the temperature T is more than 35 ℃ and less than or equal to 65 ℃, the hydraulic radiator starts to work to forcibly radiate the heat of the hydraulic oil, and the system enters step S4;
s11: when the temperature T is more than 65 ℃, stopping the machine in an overtemperature way.
5. The method for controlling the scraper type garbage compressor with full load sensitivity control according to claim 1, wherein the step S4 comprises:
s11: when the internal pressure P of the hydraulic system is more than or equal to 18MPa, the whole garbage compressor is stopped at overpressure;
s12: when the internal pressure P of the hydraulic system is less than 18MPa, the equipment enters an in-situ detection procedure.
CN201910469379.3A 2019-02-01 2019-05-31 Full-load sensitive control scraper type garbage compressor control method and circuit Active CN110182497B (en)

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DE2736572A1 (en) * 1977-08-13 1979-02-22 Haller Gmbh Fahrzeugbau Refuse vehicle compactor plate operating system - has valve to interconnect operating cylinder chambers and accelerate return stroke
CN102536932A (en) * 2012-01-11 2012-07-04 中联重科股份有限公司 Compression refuse collector and hydraulic system thereof
CN204572637U (en) * 2015-04-24 2015-08-19 长安大学 Adopt the construction machinery hydraulic system of load-sensitive
CN205397114U (en) * 2016-03-18 2016-07-27 陕西汽车集团有限责任公司 Remove automatic electrical control device in compression rubbish railway carriage or compartment and remove compression rubbish railway carriage or compartment
CN206954998U (en) * 2017-07-07 2018-02-02 上海美迅环境设备有限公司 Helical compression bunkerage with function of weighing
CN207810386U (en) * 2017-11-07 2018-09-04 湖南五星重工有限公司 A kind of scraper plate mobile garbage compressor station of wireless remote control control
CN108506285B (en) * 2018-03-28 2020-05-19 长沙湘一机械有限公司 Control method and control circuit of garbage compressor
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Address after: 410600 Changyu Science Park, Xinkang Road, Yutan Town, Ningxiang County, Changsha City, Hunan Province

Patentee after: Hunan Xiangyi Environmental Technology Co.,Ltd.

Address before: 410600 Changyu Science Park, Xinkang Road, Yutan Town, Ningxiang County, Changsha City, Hunan Province

Patentee before: CHANGSHA XIANGYI MACHINERY Co.,Ltd.