CN112377474B - Control method and control system for hydraulic system of vertical garbage compressor - Google Patents
Control method and control system for hydraulic system of vertical garbage compressor Download PDFInfo
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- CN112377474B CN112377474B CN202011116749.4A CN202011116749A CN112377474B CN 112377474 B CN112377474 B CN 112377474B CN 202011116749 A CN202011116749 A CN 202011116749A CN 112377474 B CN112377474 B CN 112377474B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
- F15B11/028—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the actuating force
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
- F15B11/17—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors using two or more pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/02—Servomotor systems with programme control derived from a store or timing device; Control devices therefor
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Abstract
A control method, a control system and a storage medium for a hydraulic system of a vertical garbage compressor are provided, wherein the control method for the hydraulic system of the vertical garbage compressor comprises the following steps: arranging a liquid-filled oil tank above the hydraulic system; when a pressure head descending signal is detected and the first oil pressure is smaller than a preset first compression oil pressure threshold value, driving the pressure head to descend by using hydraulic oil in a main oil tank and hydraulic oil in a liquid filling oil tank at the same time; when a pressure head descending signal is detected and the first oil pressure is greater than or equal to a preset first compression oil pressure threshold value, driving the pressure head to descend by using only hydraulic oil in a main oil tank; when a pressure head rising signal is detected, the pressure head is driven to rise by using hydraulic oil in the main oil tank, and the hydraulic oil is supplemented into the liquid-filled oil tank. According to the embodiment of the invention, the liquid-filled oil tank is arranged above the hydraulic system, so that potential energy brought by the liquid-filled oil tank can be effectively utilized. Potential energy caused by the descending of the pressure head can be utilized by driving the pressure head to descend and drop under the condition of different pressures.
Description
Technical Field
The invention belongs to the field of garbage disposal, and particularly relates to a control method and a control system for a hydraulic system of a vertical garbage compressor.
Background
The hydraulic control system of the three-cylinder linkage vertical garbage compressor on the market generally adopts a hydraulic pump and a straight pump to supply hydraulic oil, the hydraulic source of the hydraulic control system is controlled by two-stage pressure, however, at least 6 groups of three-cylinder vertical stations act, and the pressure of each group of actions is different, so that the situation of high-pressure control and low-pressure action can be caused, the whole system is easily in a high-energy consumption state for a long time, and further, energy waste of a certain degree is caused.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a control method of a hydraulic system of a vertical garbage compressor, which has simple steps and solves the problems that the vertical garbage compressor cannot reasonably utilize energy and wastes energy. The invention further provides a control system of the hydraulic system of the vertical garbage compressor.
According to the embodiment of the first aspect of the invention, the method for controlling the hydraulic system of the vertical garbage compressor comprises the following steps:
arranging a liquid-filled oil tank above the hydraulic system;
when the pressure head moves downwards, detecting a first oil pressure reduced by the driving pressure head;
when a pressure head descending signal is detected and the first oil pressure is smaller than a preset first compression oil pressure threshold value, simultaneously using hydraulic oil in a main oil tank and hydraulic oil in a liquid filling oil tank to drive the pressure head to descend;
when a pressure head descending signal is detected and the first oil pressure is greater than or equal to a preset first compression oil pressure threshold value, driving the pressure head to descend by only using hydraulic oil in the main oil tank;
when a pressure head rising signal is detected, hydraulic oil in a main oil tank is used for driving the pressure head to rise, and hydraulic oil is supplemented into the liquid filling oil tank.
The control method of the hydraulic system of the vertical garbage compressor provided by the embodiment of the invention at least has the following technical effects: by additionally arranging the liquid filling oil tank and arranging the liquid filling oil tank above the hydraulic system, potential energy brought by the liquid filling oil tank can be effectively utilized during hydraulic driving, and energy is greatly saved. The driving pressure head is driven to descend and work is descended under the condition of different pressures, potential energy caused by descending of the pressure head and potential energy caused by the liquid filling oil tank can be effectively utilized, and energy waste caused by that the driving pressure head is driven to work and descend when the pressure head descends at first is reduced. Meanwhile, when the driving pressure head is lowered, only the main oil tank is adopted to avoid using a liquid-filled oil tank, so that the pressure in the hydraulic system can be effectively maintained, and the pressure head is lowered more stably. In addition, when the pressure head rises, the oil is supplemented to the liquid filling oil tank in time, so that the potential energy of the liquid filling oil tank can be continuously utilized when the compression head is compressed next time.
According to some embodiments of the invention, a compression actuating assembly for controlling the operation of the pressure head is arranged in the hydraulic system, and the compression actuating assembly is provided with a compression driving end and a lifting driving end; the compression driving end is used for injecting hydraulic oil to drive the pressure head to compress downwards, and the oil pressure of the compression driving end is used as the first oil pressure; and the lifting driving end is used for injecting hydraulic oil to drive the pressure head to lift.
According to some embodiments of the present invention, the method for controlling the hydraulic system of the vertical refuse compressor further comprises the following steps: when the pressure head rises, hydraulic oil in the compression driving end is controlled to be supplemented into the liquid filling oil tank.
According to some embodiments of the present invention, the method for controlling the hydraulic system of the vertical refuse compressor further comprises the following steps: and when the first oil pressure is greater than or equal to a preset second compression oil pressure threshold value, the pressure head stops working drop.
According to some embodiments of the present invention, the method for controlling the hydraulic system of the vertical garbage compressor further comprises the following steps:
re-timing the falling time of the pressure head each time the pressure head falling signal is just detected;
continuously timing the falling time;
and when the falling time is greater than a preset first time threshold value and the first oil pressure is less than a second compression oil pressure threshold value, sending a falling fault alarm signal.
According to some embodiments of the present invention, the method for controlling the hydraulic system of the vertical garbage compressor further comprises the following steps:
when the pressure head moves upwards, detecting a second oil pressure for driving the pressure head to ascend;
and when the second oil pressure is smaller than a preset first rising oil pressure threshold value, a pressure head rising fault signal is sent out.
According to some embodiments of the present invention, the method for controlling the hydraulic system of the vertical garbage compressor further comprises the following steps:
a pressure head upper limit switch is arranged at the top end of the ascending stroke of the pressure head;
re-timing the rise time of the ram each time the ram rise signal is just detected;
continuously timing the rising time;
and when the situation that the upper limit switch of the pressure head is in place is not detected and the rising time is greater than a preset second time threshold value, sending a pressure head rising fault signal.
According to some embodiments of the invention, a solenoid proportional valve is provided in the hydraulic system for regulating the oil pressure and flow of hydraulic oil in the hydraulic system.
According to some embodiments of the invention, an electromagnetic spill valve is provided in the hydraulic system for controlling a spill state of the hydraulic system.
According to the second aspect of the invention, the vertical garbage compressor hydraulic system control system comprises: the pressure sensor is used for detecting a first oil pressure when the pressure head descends; the switch assembly is used for controlling the connection state of the liquid-filled oil tank and the hydraulic system; the driving assembly is used for controlling the working state of hydraulic oil in the hydraulic system; and the controller is respectively connected with the pressure sensor, the switch assembly and the driving assembly.
The control system of the hydraulic system of the vertical garbage compressor provided by the embodiment of the invention at least has the following technical effects: the first oil pressure value when the pressure head descends can be directly and effectively acquired through the pressure sensor, so that the follow-up controller can control the driving assembly to change the flow direction of hydraulic oil in the hydraulic system and drive the hydraulic oil to carry out hydraulic pressure. The switch assembly can control whether the liquid filling oil tank participates in the hydraulic driving process or not, and the switch assembly can be controlled through the controller.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic view of a head lowering flow of a hydraulic system control method of a vertical refuse compactor according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a head-up flow of a hydraulic system control method of the vertical refuse compactor according to an embodiment of the invention;
FIG. 3 is a block diagram of the hydraulic system control system of the vertical refuse compactor according to the embodiment of the present invention;
fig. 4 is a hydraulic system diagram of the vertical trash compactor according to the embodiment of the invention.
Reference numerals are as follows:
a liquid charging oil tank 110, a liquid charging valve 111, a main oil tank 120, a first hydraulic pump 130, a second hydraulic pump 140, an auxiliary hydraulic cylinder 151, a main hydraulic cylinder 152, a third direction changing valve 161, a pilot operated check valve 162, a solenoid proportional valve 170, a solenoid overflow valve 180, a fourth direction changing valve 191, a fifth direction changing valve 192, a sixth direction changing valve 193, a seventh direction changing valve 194, an eighth direction changing valve 195,
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, if there are first, second, third, fourth, etc. described only for the purpose of distinguishing technical features, they are not to be interpreted as indicating or implying relative importance or implying number of indicated technical features or implying precedence of indicated technical features.
In the description of the present invention, unless otherwise explicitly defined, terms such as arrangement, connection and the like should be broadly construed, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the detailed contents of the technical solutions.
A method for controlling a hydraulic system of a vertical refuse compressor according to an embodiment of the first aspect of the present invention is described below with reference to fig. 1 to 4.
The control method of the hydraulic system of the vertical garbage compressor provided by the embodiment of the invention comprises the following steps:
the liquid-filled oil tank 110 is arranged above the hydraulic system;
detecting a first oil pressure of a driving pressure head which descends when the pressure head moves downwards;
when a pressure head descending signal is detected and the first oil pressure is smaller than a preset first compression oil pressure threshold value, the pressure head is driven to descend by using the hydraulic oil in the main oil tank 120 and the hydraulic oil in the liquid-filled oil tank 110;
when a pressure head descending signal is detected and the first oil pressure is greater than or equal to a preset first compression oil pressure threshold value, the pressure head is driven to descend only by using hydraulic oil in the main oil tank 120;
when the pressure head rising signal is detected, the pressure head is driven to rise by using the hydraulic oil in the main oil tank 120, and the hydraulic oil is supplied to the liquid-filled oil tank 110.
Before describing the method for controlling the hydraulic system of the vertical garbage compressor according to the embodiment of the present invention, a brief description will be given of the hydraulic system for implementing the method.
Referring to fig. 4, the hydraulic system includes: a main oil tank 120, a first hydraulic pump 130, a second hydraulic pump 140, a parallel outlet, a multi-stage pressure regulating loop and an actuating mechanism. A first hydraulic pump 130 connected to the main tank 120 for providing a first pressure and a first flow rate of hydraulic oil; the second hydraulic pump 140 is connected to the main oil tank 120 and is used for providing a second pressure and a second flow rate of hydraulic oil, wherein the second pressure is smaller than the first pressure, and the second flow rate is larger than the first flow rate; a parallel outlet connecting the pump-out ends of the first and second hydraulic pumps 130 and 140; a multi-stage pressure regulating circuit provided between the parallel outlet and the main oil tank 120 for regulating the oil pressure and flow rate of the parallel outlet; the actuating mechanism is arranged between the parallel outlet and the main oil tank 120, the actuating mechanism is provided with a compression actuating assembly, a compression control loop and a liquid filling oil tank 110, the compression actuating assembly is arranged on the compression control loop, the liquid filling oil tank 110 is arranged above the compression actuating assembly, the liquid filling oil tank 110 is provided with a liquid filling pipeline connected with a compression driving end of the compression actuating assembly, a liquid filling valve 111 which is communicated with the compression actuating assembly in a one-way mode is arranged on the liquid filling pipeline, and the liquid filling pipeline is communicated in a two-way mode by the liquid filling valve 111 under the external control action.
The hydraulic system can adjust the oil pressure and flow of the parallel outlet through a multi-stage pressure adjusting loop to achieve the purpose of adjusting the state of hydraulic oil on the whole oil inlet pipeline, and can provide extra gravitational potential energy and flow for the compression execution assembly driving head to descend through the high-level liquid filling oil tank 110.
The following briefly describes a specific implementation process of the hydraulic system control method of the vertical garbage compressor according to the embodiment of the invention.
Referring to fig. 1 to 4, when the ram is lowered, the hydraulic pressure required for lowering the drive ram needs to be higher as the degree of depression increases, and when the drive pressure is higher than the gravity provided by the liquid-filled oil tank 110, the liquid-filled oil tank 110 needs to be disconnected in time to prevent the hydraulic oil from flowing back to the liquid-filled oil tank 110. Therefore, in order to ensure accurate control of whether the charging tank 110 is involved in driving, it is necessary to accurately detect the first oil pressure at which the drive ram is lowered, and to control whether the charging tank 110 is connected. The detection of the first oil pressure may be performed by the pressure sensor 210, and the pressure sensor 210 may be directly used as the pressure sensor 210. Control of whether the charge tank 110 is involved in the head-down hydraulic drive process may be accomplished by the charge valve 111. According to the control method of the hydraulic system of the vertical garbage compressor, the processes of the pressure head descending and the pressure head worker descending are clearly distinguished through the first compression oil pressure threshold value, and the gravitational potential energy in the pressure head descending process can be conveniently utilized to the maximum extent.
According to the control method of the hydraulic system of the vertical garbage compressor, disclosed by the embodiment of the invention, by additionally arranging the liquid filling oil tank 110 and arranging the liquid filling oil tank 110 above the hydraulic system, the potential energy brought by the liquid filling oil tank 110 can be effectively utilized during hydraulic driving, and the energy is greatly saved. By driving the pressure head to descend and drop under different pressures, the potential energy caused by descending of the pressure head and the potential energy caused by the liquid filling oil tank 110 can be effectively utilized, and energy waste caused by driving the pressure head to drop when the pressure head initially descends is reduced. Meanwhile, when the pressure head is driven to drop, the pressure in the hydraulic system can be effectively maintained by only adopting the main oil tank 120 to avoid using the liquid filling oil tank 110, so that the pressure head drop is more stable. In addition, when the pressure head rises, the oil is timely supplemented for the liquid filling oil tank 110, so that the potential energy of the liquid filling oil tank 110 can be continuously utilized when the compression is performed next time.
In some embodiments of the present invention, referring to fig. 4, the upper end of the liquid-filled tank 110 is connected to the main tank 120, and the liquid-filled line is disposed at the lower end of the liquid-filled tank 110, so that the liquid-filled tank 110 can be used to perform a certain unloading function in an abnormal operation state.
In some embodiments of the present invention, referring to FIG. 4, the compression actuation component has a compression drive end and a rising drive end; the compression driving end is used for injecting hydraulic oil to drive the pressure head to compress downwards, and the oil pressure of the compression driving end is used as first oil pressure; the lifting driving end is used for injecting hydraulic oil to drive the pressure head to lift.
In order to facilitate a clearer description of a control process of the compression executing assembly, the structure of the hydraulic system is further described herein, and with reference to fig. 4, a third reversing valve 161 is disposed on the compression control loop, a first connecting pipe connected to the compression driving end of the compression executing assembly is disposed at an oil outlet B of the third reversing valve 161, and the first connecting pipe can communicate with an oil inlet when the third reversing valve 161 is switched on in a reversing manner, so that the hydraulic oil filled in the liquid-filled oil tank 110 is sufficiently conveyed to the compression driving end of the compression executing assembly to drive the compression executing assembly to perform a downward pressure head action. In some embodiments of the present invention, in order to accurately collect the first oil pressure when the ram is lowered, a pressure sensor 210 is disposed at the compression driving end of the compression executing assembly, and the pressure is collected as the first oil pressure.
In some embodiments of the present invention, the method for controlling the hydraulic system of the vertical trash compactor further includes the following steps: when the pressure head rises, the hydraulic oil in the compression driving end is controlled to be supplemented into the liquid filling oil tank 110. In order to facilitate a clearer description of the oil replenishing process of the liquid charging tank 110 and the liquid charging valve 111, the structure of the hydraulic system is further described here, with reference to fig. 4, an oil outlet a of the third directional valve 161 is provided with a second connecting pipe connected to the rising driving end of the compression executing component and a first external control circuit connected to the liquid charging valve 111, and the first external control circuit conducts the liquid charging valve 111 in a two-way manner in a conducting state.
In some embodiments of the present invention, the piping can be designed separately, and the hydraulic oil in the lift drive end can be directly overflowed to the main oil tank by adding a make-up pump to directly make up oil from the main oil tank to the liquid-filled oil tank 110.
It should be noted that, for the purpose of achieving quick oil return, the hydraulic system is provided with a quick oil return branch connected with the main oil tank 120 on the second connecting pipe, and the specific structure can refer to fig. 4. The second connecting pipe is provided with a fast oil return branch connected with the main oil tank 120, the fast oil return branch is provided with a hydraulic control one-way valve 162 which is in one-way conduction with the compression executing assembly, the hydraulic control one-way valve 162 is provided with a second external control loop, and the second external control loop is in two-way conduction with the hydraulic control one-way valve 162 in a conduction state.
In order to further clarify the control process of the compression executing component, the structure of the compression executing component in some embodiments of the present invention is specifically described herein. Referring to fig. 4, the compression executing assembly includes two auxiliary pressure cylinders 151 and a main pressure cylinder 152, the main pressure cylinder 152 and the auxiliary pressure cylinders 151 both adopt plunger cylinders, a piston rod of the main pressure cylinder 152 is connected to the pressure head, rod cavities of the two auxiliary pressure cylinders 151 are communicated with each other and form a lifting driving end to be connected to the second connecting pipe, rod cavities of the two auxiliary pressure cylinders 151 are also communicated with a rod cavity of the main pressure cylinder 152, rod-free cavities of the two auxiliary pressure cylinders 151 are communicated with each other and form a compression driving end to be connected to the first connecting pipe and the liquid charging pipe, and rod cavities of the two auxiliary pressure cylinders 151 are connected to the rod-free cavity of the main pressure cylinder 152, so that a three-cylinder linkage structure acting simultaneously and having a large flow and a large pressure can be formed to control the pressure head of the vertical type trash compactor to perform compression work. In some embodiments of the present invention, the moving direction of the piston rods of the auxiliary hydraulic cylinder 151 and the main hydraulic cylinder 152 is set to be vertical so as to control the raising or lowering of the ram in cooperation with the liquid-filled oil tank 110, and preferably, the piston cylinder of the auxiliary hydraulic cylinder 151 is set upward and the piston rod of the main hydraulic cylinder 152 is set downward.
In some embodiments of the invention, in order to realize automatic control of garbage compression, the compression is required to be automatically stopped when the garbage is compressed and formed. The automatic compression stopping can effectively protect a hydraulic system on one hand and effectively save energy on the other hand. Therefore, the control method of the hydraulic system of the vertical garbage compressor further comprises the following steps: and when the first oil pressure is greater than or equal to a preset second compression oil pressure threshold value, stopping the work drop of the pressure head. The second compression oil pressure threshold value can be modified properly according to different types of garbage and different models of garbage compressors so as to ensure reasonable use of energy.
In some embodiments of the present invention, the method for controlling the hydraulic system of the vertical trash compactor further includes the following steps: when a pressure head descending signal is just detected, the descending time of the pressure head is counted again; continuously timing the descending time; and when the falling time is greater than a preset first time threshold value and the first oil pressure is less than a second compression oil pressure threshold value, sending a falling fault alarm signal. The garbage compression may cause problems of hydraulic system failure, mechanical failure and the like, and the problems need to be timely treated so as not to cause damage to equipment and personnel. The easiest basis for failure determination is pressure and time. For example: when the pressure head is in a descending compression state for a long time but the pressure is not over a long time, whether a fault occurs or not needs to be judged, and at the moment, the hydraulic pressure is insufficient due to the fault of a hydraulic system most easily. In order to complete the accurate timing of the fall time, the fall time needs to be zeroed and then restarted each time a head fall signal is received.
In some embodiments of the present invention, the method for controlling the hydraulic system of the vertical trash compactor further includes the following steps: when the pressure head moves upwards, detecting the second oil pressure of the rising of the driving pressure head; and when the second oil pressure is smaller than a preset first rising oil pressure threshold value, a pressure head rising fault signal is sent out. The pressure head rises and also can break down, and the easy and great trouble of influence just is that the pressure head can't rise, and the reason that leads to the unable rise of pressure head is more, is usually because the second oil pressure is not enough to lead to, consequently should send out the warning when the second oil pressure is less than the first rising oil pressure threshold value of predetermineeing, the suggestion operating personnel has broken down, needs in time to investigate.
In some embodiments of the present invention, the method for controlling the hydraulic system of the vertical trash compactor further includes the following steps: a pressure head upper limit switch 220 is arranged at the top end of the ascending stroke of the pressure head; the rising time of the pressure head is counted again each time when the rising signal of the pressure head is just detected; continuously timing the rising time; and when the situation that the upper limit switch 220 of the pressure head is in place is not detected and the rising time is greater than a preset second time threshold value, sending a pressure head rising fault signal.
For the problem that the pressure head is easy to appear when rising, the judgment is not enough only by oil pressure, when the rising time is too long, the fault should be checked in time, and the potential safety hazard can also exist at the moment. For the judgment of the ascending stroke of the pressure head, the pressure head upper limit switch 220 is required to be adopted for auxiliary judgment, and a timing period is required from the time when the pressure head ascending signal is received to the time when the pressure head upper limit switch 220 is triggered, namely the ascending time is greater than a preset second time threshold value, the fault can be judged to occur, and the fault is required to be checked.
In some embodiments of the present invention, referring to fig. 4, a proportional solenoid valve 170 is provided in the hydraulic system, and the proportional solenoid valve 170 is used for adjusting the oil pressure and the flow rate of hydraulic oil in the hydraulic system. The electromagnetic proportional valve 170 is arranged in a multistage pressure regulating loop, and the oil pressure and the flow of the hydraulic oil can be effectively changed by regulating the opening of the proportional valve.
In some embodiments of the present invention, an electromagnetic spill valve 180 is provided in the hydraulic system, and the electromagnetic spill valve 180 is used to control the spill state of the hydraulic system.
To further illustrate the control of electromagnetic spill valve 180, the structure of the hydraulic system in some embodiments of the present invention will be described further herein. Referring to fig. 4, an overflow branch is disposed between the main oil tanks at the pump-out end of the second hydraulic pump 140, and the overflow branch is sequentially provided with an electromagnetic overflow valve 180 and a radiator along the oil inlet direction for controlling the pump-out oil pressure and flow of the second hydraulic pump 140, so as to avoid the phenomena of excessive oil pressure, excessive output power, and the like.
In some embodiments of the present invention, a temperature sensor 230 is further provided for detecting the temperature of the hydraulic oil, the temperature sensor 230 collects the oil temperature and then transmits the oil temperature to the controller 240, and when the oil temperature is too high, the controller 240 may timely control the hydraulic system to stop working or reduce the working power.
In some embodiments of the present invention, as shown in fig. 4, the actuator is further provided with a shovel device, a shovel control circuit for controlling the shovel device, a gate control circuit for controlling the gate device, a front gate control circuit for controlling the front gate device, a latch hook control circuit for controlling the latch device, a latch device, and a latch control circuit for controlling the latch device, wherein the shovel control circuit, the gate control circuit, the front gate control circuit, the latch hook control circuit, and the latch control circuit and the compression control circuit are all connected in parallel to the oil inlet pipeline and the oil return pipeline of the whole system for realizing independent control of each component.
In some embodiments of the present invention, as shown in fig. 4, the blade control circuit is provided with a fourth direction-changing valve 191, the gate control circuit is provided with a fifth direction-changing valve 192, the front gate control circuit is provided with a sixth direction-changing valve 193, the latch hook control circuit is provided with a seventh direction-changing valve 194, the latch control circuit is provided with an eighth direction-changing valve 195, where the fourth direction-changing valve 191, the fifth direction-changing valve 192, the sixth direction-changing valve 193, the seventh direction-changing valve 194, and the eighth direction-changing valve 195 are all provided as Y-type three-position four-way valves, and correspondingly, the fourth direction-changing valve 191 is provided with a left electromagnetic control terminal YA4 and a right electromagnetic control terminal YA5, the fifth direction-changing valve 192 is provided with a left electromagnetic control terminal YA6 and a right electromagnetic control terminal YA7, the sixth direction-changing valve 193 is provided with a left electromagnetic control terminal YA8 and a right electromagnetic control terminal YA9, the seventh direction-changing valve 194 is provided with a left electromagnetic control terminal YA10 and a right electromagnetic control terminal YA11, and the eighth direction-changing valve 195 is provided with a left electromagnetic control terminal YA12 and a right electromagnetic control terminal YA13, so as to realize the control of the respective electromagnetic control circuits.
In some embodiments of the invention, as shown in fig. 4, the actuating assembly of the blade pushing device is provided with a horizontal double-acting telescopic cylinder, the actuating assembly of the gate device is provided with two parallel and vertically upward arranged double-acting piston rods, the actuating assembly of the front door device is provided with two parallel and vertically upward arranged double-acting piston rods, the actuating assembly of the latch hook device is provided with two parallel and vertically downward arranged double-acting piston rods, and the latch device is provided with two parallel and horizontally arranged double-acting piston rods.
In some embodiments of the present invention, as shown in fig. 4, a return oil filter 300 is disposed on a return oil line of the entire system for filtering impurities in the hydraulic oil.
According to a second aspect of the invention, the control system of the hydraulic system of the vertical garbage compressor comprises: pressure sensor 210, a switch assembly, a drive assembly, and a controller 240. A pressure sensor 210 for detecting a first oil pressure when the ram is lowered; a switch assembly for controlling the connection state of the liquid-filled tank 110 and the hydraulic system; the driving component is used for controlling the working state of hydraulic oil in the hydraulic system; and the controller 240 is respectively connected with the pressure sensor 210, the switch assembly and the driving assembly.
Referring to fig. 3, the pressure sensor 210 may effectively collect oil pressure in the compression executing component, and may further effectively obtain the first oil pressure and the second oil pressure. The switch assembly is used for controlling the on and off of the liquid filling valve 111, and the control of whether the liquid filling oil tank 110 participates in compression or not can be completed by controlling the on and off of the liquid filling valve 111. The driving component is used for driving components such as the first hydraulic pump 130, the second hydraulic pump 140, the multi-stage pressure regulating loop, the actuating mechanism and the like to work, and the working state of the components is mainly controlled through an electromagnetic valve or a relay. The controller 240 is a core control component, and is a main logic control carrier for implementing the control method of the hydraulic system of the vertical refuse compressor. The controller 240 may be a PLC, a single chip, a DSP, etc., and in some embodiments of the present invention, the PLC is mainly used, and specifically, a siemens S7 series PLC may be used.
According to the control system of the hydraulic system of the vertical garbage compressor, the pressure sensor 210 can directly and effectively acquire the first oil pressure value when the pressure head descends, so that the follow-up controller 240 can control the driving assembly to change the flow direction of hydraulic oil in the hydraulic system and drive the hydraulic oil to carry out hydraulic pressure. The switch assembly may control whether the charging tank 110 is involved in the hydraulic driving process, and the controller 240 may control the switch assembly.
In some embodiments of the present invention, the controller 240 also performs a time counting function to enable fault determination.
In some embodiments of the present invention, the control system of the vertical refuse compressor hydraulic system further includes a temperature sensor 230 connected to the controller 240, wherein the temperature sensor 230 is used for collecting the temperature of the hydraulic oil, so as to stop working or reduce the working condition in time when the oil temperature is too high.
In some embodiments of the present invention, the control system of the hydraulic system of the vertical trash compactor further comprises a head upper limit switch 220 connected to the controller 240. Through the upper limit switch 220 of the pressure head, whether the pressure head ascends in place can be effectively judged so as to start the compression process of the next descending of the pressure head.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although the embodiments of the present invention have been described in detail with reference to the accompanying drawings, the present invention is not limited to the embodiments, and those skilled in the art will understand that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (8)
1. A control method for a hydraulic system of a vertical garbage compressor is characterized in that the hydraulic system of the vertical garbage compressor comprises the following steps: the hydraulic system comprises a main oil tank (120), a first hydraulic pump (130), a second hydraulic pump (140), a parallel outlet, a multi-stage pressure regulating loop and an actuating mechanism; a first hydraulic pump (130) connected to the main tank (120) for providing a first pressure and a first flow rate of hydraulic oil; the second hydraulic pump (140) is connected with the main oil tank (120) and is used for providing second pressure and second flow of hydraulic oil, the second pressure is smaller than the first pressure, and the second flow is larger than the first flow; a parallel outlet connecting the pump-out ends of the first and second hydraulic pumps (130, 140); the multi-stage pressure regulating loop is arranged between the parallel outlet and the main oil tank (120) and is used for regulating the oil pressure and the flow of the parallel outlet; the actuating mechanism is arranged between the parallel outlet and the main oil tank (120), the actuating mechanism is provided with a compression actuating component, a compression control loop and a liquid filling oil tank (110), the compression actuating component is arranged on the compression control loop, the liquid filling oil tank (110) is arranged above the compression actuating component, the liquid filling oil tank (110) is provided with a liquid filling pipeline connected with the compression driving end of the compression actuating component, and a liquid filling valve (111) which is communicated with the compression actuating component in a one-way mode is arranged on the liquid filling pipeline; a compression driving end of the compression executing component is provided with a pressure sensor (210);
the control method of the hydraulic system of the vertical garbage compressor comprises the following steps:
arranging a liquid-filled oil tank (110) above the hydraulic system;
when the pressure head moves downwards, a first oil pressure for driving the pressure head to descend is detected through the pressure sensor (210);
when a pressure head descending signal is detected and the first oil pressure is smaller than a preset first compression oil pressure threshold value, simultaneously using hydraulic oil in a main oil tank (120) and hydraulic oil in a liquid filling oil tank (110) to drive the pressure head to descend;
when a pressure head descending signal is detected and the first oil pressure is greater than or equal to a preset first compression oil pressure threshold value, the pressure head is driven to descend only by using hydraulic oil in the main oil tank (120);
when a pressure head rising signal is detected, using hydraulic oil in a main oil tank (120) to drive the pressure head to rise, and supplementing hydraulic oil into the liquid-filled oil tank (110);
the control method of the hydraulic system of the vertical garbage compressor further comprises the following steps:
when the first oil pressure is larger than or equal to a preset second compression oil pressure threshold value, the pressure head stops working drop;
re-timing the ram fall time each time the ram fall signal is just detected;
continuously timing the falling time;
and when the falling time is greater than a preset first time threshold value and the first oil pressure is less than a second compression oil pressure threshold value, sending a falling fault alarm signal.
2. The method for controlling the hydraulic system of the vertical garbage compressor according to claim 1, wherein a compression executing assembly for controlling the operation of the pressure head is arranged in the hydraulic system, and the compression executing assembly is provided with a compression driving end and a lifting driving end; the compression driving end is used for injecting hydraulic oil to drive the pressure head to compress downwards, and the oil pressure of the compression driving end is used as the first oil pressure; and the lifting driving end is used for injecting hydraulic oil to drive the pressure head to lift.
3. The method of controlling a hydraulic system of a vertical refuse compactor according to claim 2, further comprising the steps of: when the pressure head rises, hydraulic oil in the compression driving end is controlled to be supplemented into the liquid filling oil tank (110).
4. The method of claim 1, further comprising the steps of:
when the pressure head moves upwards, detecting a second oil pressure for driving the pressure head to ascend;
and when the second oil pressure is smaller than a preset first rising oil pressure threshold value, a pressure head rising fault signal is sent out.
5. The method of controlling a hydraulic system of a vertical refuse compactor according to claim 4 further comprising the steps of:
a pressure head upper limit switch (220) is arranged at the top end of the ascending stroke of the pressure head;
re-timing the rise time of the ram each time the ram rise signal is just detected;
continuously timing the rising time;
and when the situation that the upper limit switch (220) of the pressure head is in place is not detected and the rising time is greater than a preset second time threshold value, sending out a pressure head rising fault signal.
6. The method for controlling the hydraulic system of the vertical garbage compressor according to claim 1, wherein an electromagnetic proportional valve (170) is arranged in the hydraulic system, and the electromagnetic proportional valve (170) is used for regulating the oil pressure and the flow of hydraulic oil in the hydraulic system.
7. The control method for the hydraulic system of the vertical garbage compressor according to claim 1 or 6, characterized in that an electromagnetic overflow valve (180) is arranged in the hydraulic system, and the electromagnetic overflow valve (180) is used for controlling the overflow state of the hydraulic system.
8. A hydraulic system control system of a vertical garbage compressor, which is characterized in that the control method of the hydraulic system of the vertical garbage compressor according to any one of claims 1 to 7 is adopted, and the control system comprises:
a pressure sensor (210) for detecting a first oil pressure when the ram is lowered;
the switch assembly is used for controlling the connection state of the liquid filling oil tank (110) and the hydraulic system;
the driving assembly is used for controlling the working state of hydraulic oil in the hydraulic system;
and the controller (240) is respectively connected with the pressure sensor (210), the switch assembly and the driving assembly.
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| CN204896022U (en) * | 2015-06-30 | 2015-12-23 | 湖南烟叶复烤有限公司 | Differential servo energy -saving hydraulic system of piece cigarette pre -compaction baling press |
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| CN204896022U (en) * | 2015-06-30 | 2015-12-23 | 湖南烟叶复烤有限公司 | Differential servo energy -saving hydraulic system of piece cigarette pre -compaction baling press |
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