阅读说明：本技术 智能篦冷机液压站 (Intelligent grate cooler hydraulic station ) 是由 庄永飞 周东宝 吴文虎 施巍 张爱东 于 2021-01-08 设计创作，主要内容包括：本发明公开了一种智能篦冷机液压站,包括与油箱连接油泵,油泵与比例换向阀连接,比例换向阀二路出口通过液压集成块分别与篦冷机油缸的二路进口连接；在液压集成块与篦冷机油缸之间的油路上设有变送器；在所述液压集成块、变送器上设有用于缓解压力冲击的阻尼孔；在油缸上设置油液内泄漏收集口；所述油液内泄漏收集口包括设置在油缸缸体与活塞杆接触面上的储油凹槽,储油凹槽与缸体上的油收集口连通。本发明在集成块和变送器中增加阻尼孔,使油液经过阻尼孔时缓解冲击,提高了元件的使用寿命；油缸上设置油液内泄漏收集口,避免由于油缸内油液泄漏造成外部环境污染。(The invention discloses an intelligent grate cooler hydraulic station which comprises an oil pump connected with an oil tank, wherein the oil pump is connected with a proportional reversing valve, and two outlets of the proportional reversing valve are respectively connected with two inlets of an oil cylinder of a grate cooler through hydraulic manifold blocks; a transmitter is arranged on an oil way between the hydraulic manifold block and the oil cylinder of the grate cooler; damping holes for relieving pressure impact are arranged on the hydraulic manifold block and the transmitter; an oil cylinder is provided with an oil liquid inner leakage collecting port; the oil liquid internal leakage collecting port comprises an oil storage groove arranged on the contact surface of the oil cylinder body and the piston rod, and the oil storage groove is communicated with the oil collecting port on the oil cylinder body. According to the invention, the damping holes are added in the integrated block and the transmitter, so that the impact is relieved when oil passes through the damping holes, and the service life of elements is prolonged; the oil cylinder is provided with an oil liquid internal leakage collecting port, so that external environment pollution caused by oil liquid leakage in the oil cylinder is avoided.)

1. The utility model provides a cold quick-witted hydraulic pressure station of intelligence comb, characterized by: the two-way outlet of the proportional reversing valve is respectively connected with two-way inlets of a oil cylinder of the grate cooler through a hydraulic manifold block; a transmitter is arranged on an oil way between the hydraulic manifold block and the oil cylinder of the grate cooler; damping holes for relieving pressure impact are arranged on the hydraulic manifold block and the transmitter; an oil cylinder is provided with an oil liquid inner leakage collecting port; the oil liquid internal leakage collecting port comprises an oil storage groove arranged on the contact surface of the oil cylinder body and the piston rod, and the oil storage groove is communicated with the oil collecting port on the cylinder body;

the control system takes a programmable logic controller PLC and a human-computer interface HMI as cores, and monitors liquid level, temperature, differential pressure, pressure and hydraulic cylinder action through data acquisition and driving of an external interface module;

after the system is powered on, firstly, judging which control mode to enter according to the control mode selection knobs 'debugging', 'local' and 'remote';

starting and stopping control of a hydraulic main pump and a backup oil pump:

a debugging mode: in the mode, the start and stop of the oil pump are triggered by two signals of 'oil pump start' and 'oil pump stop';

the control system takes priority stop as a principle, namely when both starting and stopping signals exist, the equipment is in a stop state; when an oil pump starting signal exists, the equipment enters an oil pump manual operation state; when the 'oil pump stop' signal exists, the oil pump enters a 'normal stop of oil pump' state;

the local mode: in the mode, the start and stop of the oil pump are triggered by two signals of 'oil pump start' and 'oil pump stop';

③ remote mode: in this mode, the start-stop of the oil pump is triggered by a "remote oil pump drive" signal;

when the control system detects that a remote oil pump driving signal exists, the equipment enters an oil pump remote operation state;

under the states of manual operation of the oil pump, local operation of the oil pump or remote operation of the oil pump, the control system judges and outputs according to a standby pump switching signal; if the standby pump switching signal exists, the standby pump works;

starting and stopping the proportional directional valve and controlling the sequence:

the forward and backward movement of the hydraulic cylinder of the grate cooler hydraulic station is completed by controlling the connection direction of the proportional reversing valve; when a negative signal of the proportional reversing valve is given, the hydraulic oil way is changed from a closed state to a state of enabling the hydraulic cylinder to extend forwards; when a positive signal of the proportional reversing valve is given, the hydraulic oil way is changed from a closed state to a state of enabling the hydraulic cylinder to retract backwards; the control system judges the current state of the hydraulic cylinder and determines the seeding state by detecting the forward or backward in-place signal state of the displacement sensor; the forward movement and the backward movement of the hydraulic cylinder have an interlocking relationship, namely when the hydraulic cylinder moves forward, the backward movement is not allowed; when the hydraulic cylinder moves backwards, the forward movement is not allowed;

a debugging mode: in the mode, the action of the proportional reversing valve is triggered by a grate bed forward signal and a grate bed backward signal;

when the control system detects a 'grate bed advancing' signal, the equipment enters a 'hydraulic cylinder manual forerunner' state and controls and outputs a 'proportional valve negative signal'; the control system always monitors the 'hydraulic cylinder in-place' signal in the 'hydraulic cylinder manual forward driving' process; if the control system does not detect the 'hydraulic cylinder in-place' signal, the equipment keeps a 'hydraulic cylinder manual driving' state; if the control system detects a 'hydraulic cylinder in-place' signal, the equipment enters a 'hydraulic cylinder manual stop' state and outputs a 'proportional valve zero signal'; when the control system detects a grate bed backing signal, the equipment enters a hydraulic cylinder manual back-driving state and controls and outputs a proportional valve positive signal; the control system always monitors a signal that the hydraulic cylinder moves back to the position in the process of 'manual rear drive of the hydraulic cylinder'; if the control system does not detect the signal that the hydraulic cylinder moves back to the position, the equipment keeps the state of manual back-driving of the hydraulic cylinder; if the control system detects a hydraulic cylinder in-place returning signal, the equipment enters a hydraulic cylinder manual stop state and outputs a proportional valve zero signal;

the local mode: in the mode, the action of the proportional reversing valves belongs to a continuous automatic state, and all rows of proportional valves act according to a stroke stepping sequence;

in the case of the 3-row type, the grate bed action stroke consists of 4 steps: 1) and the rows 1-3 are pushed forwards at the same time, and the pushing is stopped when the rows arrive at the position; 2) the 1 row retreats backwards and stops when the row retreats to the position; 3) and 2, moving backwards to the position and stopping; 4) 3, backing back the row and stopping when the row is back to the position; the sequential stepping action of the proportional reversing valve is triggered by grate bed starting signals and grate bed stopping signals;

when the control system detects a grate bed starting signal, the equipment enters a hydraulic cylinder local automatic state; when the control system detects a grate bed stop signal, the equipment enters a hydraulic cylinder local stop state;

when the equipment enters a 'hydraulic cylinder local automatic' state, triggering a 1-3-column 'hydraulic cylinder local precursor' state, and outputting a 'proportional valve negative signal'; the control system always monitors the 'hydraulic cylinder in-place' signal in the 'hydraulic cylinder local forerunner' process; if the control system does not detect the 'hydraulic cylinder in-place' signal, the equipment keeps a 'hydraulic cylinder local forerunner' state; if the control system detects a 'hydraulic cylinder in-place' signal, the equipment enters a 'hydraulic cylinder local precursor stopping waiting' state and outputs a 'proportional valve zero signal';

when the 1-3 rows are in a state of 'hydraulic cylinder local front driving stopping waiting', the 1 row enters a 'hydraulic cylinder local rear driving' state and outputs a 'proportional valve positive signal'; the control system always monitors a signal that the hydraulic cylinder moves back to the position in the process of 'local back drive of the hydraulic cylinder'; if the control system does not detect the signal of 'hydraulic cylinder back in place', the equipment keeps the 'hydraulic cylinder local back drive' state; when the control system detects a hydraulic cylinder in-place returning signal, the equipment enters a hydraulic cylinder local back drive stop waiting state and outputs a proportional valve zero signal;

when the 1 column is in a state of 'hydraulic cylinder local rear-drive stop waiting', the 2 columns enter a state of 'hydraulic cylinder local rear-drive' to output a 'proportional valve positive signal'; the control system always monitors a signal that the hydraulic cylinder moves back to the position in the process of 'local back drive of the hydraulic cylinder'; if the control system does not detect the signal of 'hydraulic cylinder back in place', the equipment keeps the 'hydraulic cylinder local back drive' state; when the control system detects a hydraulic cylinder in-place returning signal, the equipment enters a hydraulic cylinder local back drive stop waiting state and outputs a proportional valve zero signal;

when the 2 rows are in a state of 'hydraulic cylinder local rear-drive stop waiting', the 3 rows enter a 'hydraulic cylinder local rear-drive' state to output a 'proportional valve positive signal'; the control system always monitors a signal that the hydraulic cylinder moves back to the position in the process of 'local back drive of the hydraulic cylinder'; if the control system does not detect the signal of 'hydraulic cylinder back in place', the equipment keeps the 'hydraulic cylinder local back drive' state; when the control system detects a hydraulic cylinder in-place returning signal, the equipment enters a hydraulic cylinder local back drive stop waiting state and outputs a proportional valve zero signal;

when 3 rows are in a state of 'hydraulic cylinder local back driving stopping waiting', starting to execute next stroke action, namely triggering a state of 'hydraulic cylinder local front driving' of 1-3 rows so as to circulate;

③ remote mode: in this mode, the action of the proportional reversing valve belongs to a continuous automatic state; the action logic is consistent with the local mode; the sequential stepping action of the proportional reversing valve is triggered by a grate bed remote driving signal;

automatic tracking control of the action frequency of the hydraulic cylinder:

the speed of the movement of the hydraulic cylinder of the grate cooler hydraulic station is finished by controlling the opening degree of the proportional reversing valve, when the absolute value of a given proportional valve signal is larger, the opening degree of the proportional reversing valve in the corresponding direction is larger, and the speed corresponding to the action of the hydraulic cylinder is higher; the process of the host machine equipment of the grate cooler constantly controls the thickness of the material on the grate bed, which is realized by changing the action frequency of a hydraulic cylinder, namely the stroke frequency of stepping action completed per minute; the control system calculates and obtains theoretical time through required frequency, detects the actual time of the decomposition action of the hydraulic cylinder, constantly adjusts the signal size of the proportional reversing valve according to the deviation of the actual time and the theoretical time and the adjustment rule, and realizes the automatic adjustment and tracking of the action frequency of the hydraulic cylinder;

starting and stopping of the circulating oil pump and the electric heater:

the resistance loss of the hydraulic oil of the hydraulic system is converted into the heat of the hydraulic oil; the hydraulic oil can keep the hydraulic performance within a certain range; when the temperature of the hydraulic oil is too low, the fluidity is poor, and the resistance loss is large; the temperature of the hydraulic oil is too high, the internal leakage amount is increased, and the aging degree of the sealing element is increased;

a debugging mode: in this mode, the start and stop of the circulating oil pump/heater are triggered by two signals of "circulating oil pump/heater start" and "circulating oil pump/heater stop";

when the control system detects a 'starting signal of a circulating oil pump/heater', the equipment enters a 'manual operation of the circulating oil pump/heater' state; when the control system detects a 'stop of circulating oil pump/heater' signal, the equipment enters a 'stop of circulating oil pump/heater' state;

the local mode: in the mode, the start and stop of the circulating oil pump/heater are triggered to act by three signals of 'local oil auxiliary drive', 'oil temperature needs to be increased' and 'oil temperature needs to be reduced';

the local oil auxiliary driving signal is used as an enabling signal, and if the signal is not detected, the automatic cooling function of the circulating pump is cancelled, and the automatic heating function of the heater is cancelled;

when the control system detects a signal that the oil temperature needs to be reduced, the equipment enters a local running state of a circulating pump; when the control system detects a signal that the oil temperature needs to be reduced, the equipment enters a state of stopping a circulating pump;

when the control system detects a signal that the oil temperature needs to be increased, the equipment enters a heater local running state; when the control system detects a signal that the oil temperature needs to be increased, the equipment enters a heater stop state;

③ remote mode: in the mode, the start and stop of the circulating oil pump/heater are triggered to act by three signals of 'auxiliary drive of central control oil', 'oil temperature needs to be increased' and 'oil temperature needs to be reduced'; the action logic is consistent with the local mode;

monitoring and alarming the action time and the process quantities of liquid level, pressure difference, temperature, pressure and the like of the hydraulic cylinder:

after the system is electrified, the control system monitors the forward time of the hydraulic cylinder and judges the signals of filtering differential pressure signaling and oil level lower limit of the oil temperature upper limit; the 'oil temperature is too high' and the 'filter is blocked' are light faults, the 'hydraulic cylinder moves forwards overtime' and the 'oil level is too low' are heavy faults; when the alarm signal occurs, the control system outputs corresponding alarm information;

touch screen monitoring operation:

because the related control and monitoring processes of the system are more, the touch screen is adopted to monitor and operate the equipment state; the touch screen has the functions of on-off operation and state display which can be realized by a common relay control system, and also has character alarm information and process quantity historical records, thereby providing convenience for equipment fault analysis and maintenance operation;

the control system operating method comprises the following steps:

the working condition of the whole grate bed of the grate cooler is known by setting parameters through the touch screen and observing necessary feedback parameters from a configuration picture of the touch screen, so that necessary reference is provided for analyzing some faults;

after the touch screen is electrified and operated, automatically starting a project file, wherein the time is 60S, and viewing a control system initial interface, namely a 'system home page' interface after the start is finished;

clicking an interface selection button on the picture to enter a corresponding operation interface;

the 'equipment state' interface displays the hydraulic principle and the equipment state of the system;

when the 'cabinet monitoring' picture is in a 'local'/'debugging' mode, the picture is used as an operation interface of the hydraulic transmission cabinet;

the operation interface of the cabinet comprises oil pump operation and grate bed operation; when in the 'debugging mode', the manual operation can be carried out on a single row under the 'grate bed operation';

when the remote monitoring picture is in a remote mode, the remote monitoring picture is used as a monitoring interface for controlling automatic operation in hydraulic transmission, and the operation of the cabinet is invalid;

the status indicator lamps in the control panel of each device in the picture mainly comprise buttons of 'ready', 'running', 'fault', 'starting' and 'stopping';

the ready indicator light highlights yellow; indicating that the device has a condition for start-up that has been met, allowing start-up;

the running indicator light is highlighted to display green; indicating that the device has a condition for start-up that has been met, allowing start-up; if gray is displayed, the equipment is in a stop state;

the 'failure' indicator light is highlighted to display red; indicating that the device is in a fault-stopped state; when the equipment fault indicator lamp is turned on, the fault state is kept until the fault is eliminated by a cycle inspection worker, and the equipment can be restarted after the fault confirmation is pressed on the alarm list interface;

when the equipment is ready/allowed to be started, the equipment can be started by clicking a start button;

when the equipment runs, the equipment can be stopped by clicking a stop button;

displaying and recording alarm/fault information of a nearest system on an alarm list picture; when the equipment sends out a comprehensive alarm signal, a patroller needs to be sent to enter the interface to check the equipment alarm information, and after the alarm information is confirmed, an alarm confirmation button is clicked to cancel the comprehensive alarm signal; when the equipment sends out a comprehensive fault signal, a patroller needs to be sent to enter the interface to check the fault information of the equipment, and after the fault is confirmed and eliminated, the comprehensive fault signal can be cancelled by clicking a fault reset button, and the equipment is allowed to be driven again; when the equipment is overhauled again by people, the fault can be reset only by ensuring that the personnel is in a safe state so as to prevent safety accidents caused by self-starting of the equipment

The trend curve interface comprises trend curves of oil temperature, pressure, displacement and the like, and records the state trend of the equipment analog quantity within 1 minute so as to better know the running state of the equipment;

a parameter setting interface, which can set the alarm and enable forbidden grate bed information of the equipment according to the actual condition of the equipment so as to ensure the stability, reliability and safety of the operation of the equipment; the oil temperature control system mainly comprises an upper limit, a lower limit and a lower limit of oil temperature; an upper limit of oil pressure; an upper limit of the spool opening; setting the upper limit, the upper limit and the position of the displacement deviation; the parameters are set by the method which needs administrator authority to modify.

2. The hydraulic station of the intelligent grate cooler as set forth in claim 1, characterized in that: the oil collection port is connected with an oil tank for collecting leaked oil.

3. The hydraulic station of the intelligent grate cooler according to claim 1 or 2, characterized in that: the oil path connecting the oil pump and the proportional reversing valve is provided with a pressure regulating valve.

Technical Field

The invention relates to a hydraulic station of a grate cooler.

Background

The pressure impact of the oil circuit of the hydraulic station of the existing grate cooler on a hydraulic manifold block and the like is large, and the service life of elements is short; in addition, the oil cylinder is easy to leak oil in the using process, so that the external environment is polluted.

Disclosure of Invention

The invention aims to provide an intelligent grate cooler hydraulic station with good working performance and long service life.

The technical solution of the invention is as follows:

the utility model provides a cold quick-witted hydraulic pressure station of intelligence comb, characterized by: the two-way outlet of the proportional reversing valve is respectively connected with two-way inlets of a oil cylinder of the grate cooler through a hydraulic manifold block; a transmitter is arranged on an oil way between the hydraulic manifold block and the oil cylinder of the grate cooler; damping holes for relieving pressure impact are arranged on the hydraulic manifold block and the transmitter; an oil cylinder is provided with an oil liquid inner leakage collecting port; the oil liquid internal leakage collecting port comprises an oil storage groove arranged on the contact surface of the oil cylinder body and the piston rod, and the oil storage groove is communicated with the oil collecting port on the cylinder body;

the control system takes a programmable logic controller PLC and a human-computer interface HMI as cores, and monitors liquid level, temperature, differential pressure, pressure and hydraulic cylinder action through data acquisition and driving of an external interface module;

after the system is powered on, firstly, judging which control mode to enter according to the control mode selection knobs 'debugging', 'local' and 'remote';

starting and stopping control of a hydraulic main pump and a backup oil pump:

a debugging mode: in the mode, the start and stop of the oil pump are triggered by two signals of 'oil pump start' and 'oil pump stop';

the control system takes priority stop as a principle, namely when both starting and stopping signals exist, the equipment is in a stop state; when an oil pump starting signal exists, the equipment enters an oil pump manual operation state; when the 'oil pump stop' signal exists, the oil pump enters a 'normal stop of oil pump' state;

the local mode: in the mode, the start and stop of the oil pump are triggered by two signals of 'oil pump start' and 'oil pump stop';

③ remote mode: in this mode, the start-stop of the oil pump is triggered by a "remote oil pump drive" signal;

when the control system detects that a remote oil pump driving signal exists, the equipment enters an oil pump remote operation state;

under the states of manual operation of the oil pump, local operation of the oil pump or remote operation of the oil pump, the control system judges and outputs according to a standby pump switching signal; if the standby pump switching signal exists, the standby pump works;

starting and stopping the proportional directional valve and controlling the sequence:

the forward and backward movement of the hydraulic cylinder of the grate cooler hydraulic station is completed by controlling the connection direction of the proportional reversing valve; when a negative signal of the proportional reversing valve is given, the hydraulic oil way is changed from a closed state to a state of enabling the hydraulic cylinder to extend forwards; when a positive signal of the proportional reversing valve is given, the hydraulic oil way is changed from a closed state to a state of enabling the hydraulic cylinder to retract backwards; the control system judges the current state of the hydraulic cylinder and determines the seeding state by detecting the forward or backward in-place signal state of the displacement sensor; the forward movement and the backward movement of the hydraulic cylinder have an interlocking relationship, namely when the hydraulic cylinder moves forward, the backward movement is not allowed; when the hydraulic cylinder moves backwards, the forward movement is not allowed;

a debugging mode: in the mode, the action of the proportional reversing valve is triggered by a grate bed forward signal and a grate bed backward signal;

when the control system detects a 'grate bed advancing' signal, the equipment enters a 'hydraulic cylinder manual forerunner' state and controls and outputs a 'proportional valve negative signal'; the control system always monitors the 'hydraulic cylinder in-place' signal in the 'hydraulic cylinder manual forward driving' process; if the control system does not detect the 'hydraulic cylinder in-place' signal, the equipment keeps a 'hydraulic cylinder manual driving' state; if the control system detects a 'hydraulic cylinder in-place' signal, the equipment enters a 'hydraulic cylinder manual stop' state and outputs a 'proportional valve zero signal'; when the control system detects a grate bed backing signal, the equipment enters a hydraulic cylinder manual back-driving state and controls and outputs a proportional valve positive signal; the control system always monitors a signal that the hydraulic cylinder moves back to the position in the process of 'manual rear drive of the hydraulic cylinder'; if the control system does not detect the signal that the hydraulic cylinder moves back to the position, the equipment keeps the state of manual back-driving of the hydraulic cylinder; if the control system detects a hydraulic cylinder in-place returning signal, the equipment enters a hydraulic cylinder manual stop state and outputs a proportional valve zero signal;

the local mode: in the mode, the action of the proportional reversing valves belongs to a continuous automatic state, and all rows of proportional valves act according to a stroke stepping sequence;

in the case of the 3-row type, the grate bed action stroke consists of 4 steps: 1) and the rows 1-3 are pushed forwards at the same time, and the pushing is stopped when the rows arrive at the position; 2) the 1 row retreats backwards and stops when the row retreats to the position; 3) and 2, moving backwards to the position and stopping; 4) 3, backing back the row and stopping when the row is back to the position; the sequential stepping action of the proportional reversing valve is triggered by grate bed starting signals and grate bed stopping signals;

when the control system detects a grate bed starting signal, the equipment enters a hydraulic cylinder local automatic state; when the control system detects a grate bed stop signal, the equipment enters a hydraulic cylinder local stop state;

when the equipment enters a 'hydraulic cylinder local automatic' state, triggering a 1-3-column 'hydraulic cylinder local precursor' state, and outputting a 'proportional valve negative signal'; the control system always monitors the 'hydraulic cylinder in-place' signal in the 'hydraulic cylinder local forerunner' process; if the control system does not detect the 'hydraulic cylinder in-place' signal, the equipment keeps a 'hydraulic cylinder local forerunner' state; if the control system detects a 'hydraulic cylinder in-place' signal, the equipment enters a 'hydraulic cylinder local precursor stopping waiting' state and outputs a 'proportional valve zero signal';

when the 1-3 rows are in a state of 'hydraulic cylinder local front driving stopping waiting', the 1 row enters a 'hydraulic cylinder local rear driving' state and outputs a 'proportional valve positive signal'; the control system always monitors a signal that the hydraulic cylinder moves back to the position in the process of 'local back drive of the hydraulic cylinder'; if the control system does not detect the signal of 'hydraulic cylinder back in place', the equipment keeps the 'hydraulic cylinder local back drive' state; when the control system detects a hydraulic cylinder in-place returning signal, the equipment enters a hydraulic cylinder local back drive stop waiting state and outputs a proportional valve zero signal;

when the 1 column is in a state of 'hydraulic cylinder local rear-drive stop waiting', the 2 columns enter a state of 'hydraulic cylinder local rear-drive' to output a 'proportional valve positive signal'; the control system always monitors a signal that the hydraulic cylinder moves back to the position in the process of 'local back drive of the hydraulic cylinder'; if the control system does not detect the signal of 'hydraulic cylinder back in place', the equipment keeps the 'hydraulic cylinder local back drive' state; when the control system detects a hydraulic cylinder in-place returning signal, the equipment enters a hydraulic cylinder local back drive stop waiting state and outputs a proportional valve zero signal;

when the 2 rows are in a state of 'hydraulic cylinder local rear-drive stop waiting', the 3 rows enter a 'hydraulic cylinder local rear-drive' state to output a 'proportional valve positive signal'; the control system always monitors a signal that the hydraulic cylinder moves back to the position in the process of 'local back drive of the hydraulic cylinder'; if the control system does not detect the signal of 'hydraulic cylinder back in place', the equipment keeps the 'hydraulic cylinder local back drive' state; when the control system detects a hydraulic cylinder in-place returning signal, the equipment enters a hydraulic cylinder local back drive stop waiting state and outputs a proportional valve zero signal;

when 3 rows are in a state of 'hydraulic cylinder local back driving stopping waiting', starting to execute next stroke action, namely triggering a state of 'hydraulic cylinder local front driving' of 1-3 rows so as to circulate;

③ remote mode: in this mode, the action of the proportional reversing valve belongs to a continuous automatic state; the action logic is consistent with the local mode; the sequential stepping action of the proportional reversing valve is triggered by a grate bed remote driving signal;

automatic tracking control of the action frequency of the hydraulic cylinder:

the speed of the movement of the hydraulic cylinder of the grate cooler hydraulic station is finished by controlling the opening degree of the proportional reversing valve, when the absolute value of a given proportional valve signal is larger, the opening degree of the proportional reversing valve in the corresponding direction is larger, and the speed corresponding to the action of the hydraulic cylinder is higher; the process of the host machine equipment of the grate cooler constantly controls the thickness of the material on the grate bed, which is realized by changing the action frequency of a hydraulic cylinder, namely the stroke frequency of stepping action completed per minute; the control system calculates and obtains theoretical time through required frequency, detects the actual time of the decomposition action of the hydraulic cylinder, constantly adjusts the signal size of the proportional reversing valve according to the deviation of the actual time and the theoretical time and the adjustment rule, and realizes the automatic adjustment and tracking of the action frequency of the hydraulic cylinder;

starting and stopping of the circulating oil pump and the electric heater:

the resistance loss of the hydraulic oil of the hydraulic system is converted into the heat of the hydraulic oil; the hydraulic oil can keep the hydraulic performance within a certain range; when the temperature of the hydraulic oil is too low, the fluidity is poor, and the resistance loss is large; the temperature of the hydraulic oil is too high, the internal leakage amount is increased, and the aging degree of the sealing element is increased;

a debugging mode: in this mode, the start and stop of the circulating oil pump/heater are triggered by two signals of "circulating oil pump/heater start" and "circulating oil pump/heater stop";

when the control system detects a 'starting signal of a circulating oil pump/heater', the equipment enters a 'manual operation of the circulating oil pump/heater' state; when the control system detects a 'stop of circulating oil pump/heater' signal, the equipment enters a 'stop of circulating oil pump/heater' state;

the local mode: in the mode, the start and stop of the circulating oil pump/heater are triggered to act by three signals of 'local oil auxiliary drive', 'oil temperature needs to be increased' and 'oil temperature needs to be reduced';

the local oil auxiliary driving signal is used as an enabling signal, and if the signal is not detected, the automatic cooling function of the circulating pump is cancelled, and the automatic heating function of the heater is cancelled;

when the control system detects a signal that the oil temperature needs to be reduced, the equipment enters a local running state of a circulating pump; when the control system detects a signal that the oil temperature needs to be reduced, the equipment enters a state of stopping a circulating pump;

when the control system detects a signal that the oil temperature needs to be increased, the equipment enters a heater local running state; when the control system detects a signal that the oil temperature needs to be increased, the equipment enters a heater stop state;

③ remote mode: in the mode, the start and stop of the circulating oil pump/heater are triggered to act by three signals of 'auxiliary drive of central control oil', 'oil temperature needs to be increased' and 'oil temperature needs to be reduced'; the action logic is consistent with the local mode;

monitoring and alarming the action time and the process quantities of liquid level, pressure difference, temperature, pressure and the like of the hydraulic cylinder:

after the system is electrified, the control system monitors the forward time of the hydraulic cylinder and judges the signals of filtering differential pressure signaling and oil level lower limit of the oil temperature upper limit; the 'oil temperature is too high' and the 'filter is blocked' are light faults, the 'hydraulic cylinder moves forwards overtime' and the 'oil level is too low' are heavy faults; when the alarm signal occurs, the control system outputs corresponding alarm information;

touch screen monitoring operation:

because the related control and monitoring processes of the system are more, the touch screen is adopted to monitor and operate the equipment state; the touch screen has the functions of on-off operation and state display which can be realized by a common relay control system, and also has character alarm information and process quantity historical records, thereby providing convenience for equipment fault analysis and maintenance operation;

the control system operating method comprises the following steps:

the working condition of the whole grate bed of the grate cooler is known by setting parameters through the touch screen and observing necessary feedback parameters from a configuration picture of the touch screen, so that necessary reference is provided for analyzing some faults;

after the touch screen is electrified and operated, automatically starting a project file, wherein the time is 60S, and viewing a control system initial interface, namely a 'system home page' interface after the start is finished;

clicking an interface selection button on the picture to enter a corresponding operation interface;

the 'equipment state' interface displays the hydraulic principle and the equipment state of the system;

when the 'cabinet monitoring' picture is in a 'local'/'debugging' mode, the picture is used as an operation interface of the hydraulic transmission cabinet;

the operation interface of the cabinet comprises oil pump operation and grate bed operation; when in the 'debugging mode', the manual operation can be carried out on a single row under the 'grate bed operation';

when the remote monitoring picture is in a remote mode, the remote monitoring picture is used as a monitoring interface for controlling automatic operation in hydraulic transmission, and the operation of the cabinet is invalid;

the status indicator lamps in the control panel of each device in the picture mainly comprise buttons of 'ready', 'running', 'fault', 'starting' and 'stopping';

the ready indicator light highlights yellow; indicating that the device has a condition for start-up that has been met, allowing start-up;

the running indicator light is highlighted to display green; indicating that the device has a condition for start-up that has been met, allowing start-up; if gray is displayed, the equipment is in a stop state;

the 'failure' indicator light is highlighted to display red; indicating that the device is in a fault-stopped state; when the equipment fault indicator lamp is turned on, the fault state is kept until the fault is eliminated by a cycle inspection worker, and the equipment can be restarted after the fault confirmation is pressed on the alarm list interface;

when the equipment is ready/allowed to be started, the equipment can be started by clicking a start button;

when the equipment runs, the equipment can be stopped by clicking a stop button;

displaying and recording alarm/fault information of a nearest system on an alarm list picture; when the equipment sends out a comprehensive alarm signal, a patroller needs to be sent to enter the interface to check the equipment alarm information, and after the alarm information is confirmed, an alarm confirmation button is clicked to cancel the comprehensive alarm signal; when the equipment sends out a comprehensive fault signal, a patroller needs to be sent to enter the interface to check the fault information of the equipment, and after the fault is confirmed and eliminated, the comprehensive fault signal can be cancelled by clicking a fault reset button, and the equipment is allowed to be driven again; when the equipment is overhauled again by people, the fault can be reset only by ensuring that the personnel is in a safe state so as to prevent safety accidents caused by self-starting of the equipment

The trend curve interface comprises trend curves of oil temperature, pressure, displacement and the like, and records the state trend of the equipment analog quantity within 1 minute so as to better know the running state of the equipment;

a parameter setting interface, which can set the alarm and enable forbidden grate bed information of the equipment according to the actual condition of the equipment so as to ensure the stability, reliability and safety of the operation of the equipment; the oil temperature control system mainly comprises an upper limit, a lower limit and a lower limit of oil temperature; an upper limit of oil pressure; an upper limit of the spool opening; setting the upper limit, the upper limit and the position of the displacement deviation; the parameters are set by the method which needs administrator authority to modify.

The oil collection port is connected with an oil tank for collecting leaked oil.

The oil path connecting the oil pump and the proportional reversing valve is provided with a pressure regulating valve.

According to the invention, the damping holes are added in the integrated block and the transmitter, so that the impact is relieved when oil passes through the damping holes, and the service life of elements is prolonged; the oil cylinder is provided with an oil liquid internal leakage collecting port, so that external environment pollution caused by oil liquid leakage in the oil cylinder is avoided.

Drawings

The invention is further illustrated by the following figures and examples.

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a schematic view showing a structure of a leakage collecting port in oil.

Detailed Description

An intelligent hydraulic station of a grate cooler comprises an oil pump 2 connected with an oil tank 1, the oil pump is connected with a proportional reversing valve 3, and two outlets of the proportional reversing valve are respectively connected with two inlets of a grate cooler oil cylinder 5 through a hydraulic manifold block 4; a transmitter 6 is arranged on an oil way between the hydraulic manifold block and the oil cylinder of the grate cooler; damping holes for relieving pressure impact are arranged on the hydraulic manifold block and the transmitter; an oil cylinder is provided with an oil liquid inner leakage collecting port; the oil liquid internal leakage collecting port comprises an oil storage groove 8 arranged on the contact surface of the oil cylinder body and the piston rod, and the oil storage groove is communicated with an oil collecting port 9 on the cylinder body;

the control system takes a programmable logic controller PLC and a human-computer interface HMI as cores, and monitors liquid level, temperature, differential pressure, pressure and hydraulic cylinder action through data acquisition and driving of an external interface module;

after the system is powered on, firstly, judging which control mode to enter according to the control mode selection knobs 'debugging', 'local' and 'remote';

starting and stopping control of a hydraulic main pump and a backup oil pump:

a debugging mode: in the mode, the start and stop of the oil pump are triggered by two signals of 'oil pump start' and 'oil pump stop';

the control system takes priority stop as a principle, namely when both starting and stopping signals exist, the equipment is in a stop state; when an oil pump starting signal exists, the equipment enters an oil pump manual operation state; when the 'oil pump stop' signal exists, the oil pump enters a 'normal stop of oil pump' state;

the local mode: in the mode, the start and stop of the oil pump are triggered by two signals of 'oil pump start' and 'oil pump stop';

③ remote mode: in this mode, the start-stop of the oil pump is triggered by a "remote oil pump drive" signal;

when the control system detects that a remote oil pump driving signal exists, the equipment enters an oil pump remote operation state;

under the states of manual operation of the oil pump, local operation of the oil pump or remote operation of the oil pump, the control system judges and outputs according to a standby pump switching signal; if the standby pump switching signal exists, the standby pump works;

starting and stopping the proportional directional valve and controlling the sequence:

the forward and backward movement of the hydraulic cylinder of the grate cooler hydraulic station is completed by controlling the connection direction of the proportional reversing valve; when a negative signal of the proportional reversing valve is given, the hydraulic oil way is changed from a closed state to a state of enabling the hydraulic cylinder to extend forwards; when a positive signal of the proportional reversing valve is given, the hydraulic oil way is changed from a closed state to a state of enabling the hydraulic cylinder to retract backwards; the control system judges the current state of the hydraulic cylinder and determines the seeding state by detecting the forward or backward in-place signal state of the displacement sensor; the forward movement and the backward movement of the hydraulic cylinder have an interlocking relationship, namely when the hydraulic cylinder moves forward, the backward movement is not allowed; when the hydraulic cylinder moves backwards, the forward movement is not allowed;

a debugging mode: in the mode, the action of the proportional reversing valve is triggered by a grate bed forward signal and a grate bed backward signal;

when the control system detects a 'grate bed advancing' signal, the equipment enters a 'hydraulic cylinder manual forerunner' state and controls and outputs a 'proportional valve negative signal'; the control system always monitors the 'hydraulic cylinder in-place' signal in the 'hydraulic cylinder manual forward driving' process; if the control system does not detect the 'hydraulic cylinder in-place' signal, the equipment keeps a 'hydraulic cylinder manual driving' state; if the control system detects a 'hydraulic cylinder in-place' signal, the equipment enters a 'hydraulic cylinder manual stop' state and outputs a 'proportional valve zero signal'; when the control system detects a grate bed backing signal, the equipment enters a hydraulic cylinder manual back-driving state and controls and outputs a proportional valve positive signal; the control system always monitors a signal that the hydraulic cylinder moves back to the position in the process of 'manual rear drive of the hydraulic cylinder'; if the control system does not detect the signal that the hydraulic cylinder moves back to the position, the equipment keeps the state of manual back-driving of the hydraulic cylinder; if the control system detects a hydraulic cylinder in-place returning signal, the equipment enters a hydraulic cylinder manual stop state and outputs a proportional valve zero signal;

the local mode: in the mode, the action of the proportional reversing valves belongs to a continuous automatic state, and all rows of proportional valves act according to a stroke stepping sequence;

in the case of the 3-row type, the grate bed action stroke consists of 4 steps: 1) and the rows 1-3 are pushed forwards at the same time, and the pushing is stopped when the rows arrive at the position; 2) the 1 row retreats backwards and stops when the row retreats to the position; 3) and 2, moving backwards to the position and stopping; 4) 3, backing back the row and stopping when the row is back to the position; the sequential stepping action of the proportional reversing valve is triggered by grate bed starting signals and grate bed stopping signals;

when the control system detects a grate bed starting signal, the equipment enters a hydraulic cylinder local automatic state; when the control system detects a grate bed stop signal, the equipment enters a hydraulic cylinder local stop state;

when the equipment enters a 'hydraulic cylinder local automatic' state, triggering a 1-3-column 'hydraulic cylinder local precursor' state, and outputting a 'proportional valve negative signal'; the control system always monitors the 'hydraulic cylinder in-place' signal in the 'hydraulic cylinder local forerunner' process; if the control system does not detect the 'hydraulic cylinder in-place' signal, the equipment keeps a 'hydraulic cylinder local forerunner' state; if the control system detects a 'hydraulic cylinder in-place' signal, the equipment enters a 'hydraulic cylinder local precursor stopping waiting' state and outputs a 'proportional valve zero signal';

when the 1-3 rows are in a state of 'hydraulic cylinder local front driving stopping waiting', the 1 row enters a 'hydraulic cylinder local rear driving' state and outputs a 'proportional valve positive signal'; the control system always monitors a signal that the hydraulic cylinder moves back to the position in the process of 'local back drive of the hydraulic cylinder'; if the control system does not detect the signal of 'hydraulic cylinder back in place', the equipment keeps the 'hydraulic cylinder local back drive' state; when the control system detects a hydraulic cylinder in-place returning signal, the equipment enters a hydraulic cylinder local back drive stop waiting state and outputs a proportional valve zero signal;

when the 1 column is in a state of 'hydraulic cylinder local rear-drive stop waiting', the 2 columns enter a state of 'hydraulic cylinder local rear-drive' to output a 'proportional valve positive signal'; the control system always monitors a signal that the hydraulic cylinder moves back to the position in the process of 'local back drive of the hydraulic cylinder'; if the control system does not detect the signal of 'hydraulic cylinder back in place', the equipment keeps the 'hydraulic cylinder local back drive' state; when the control system detects a hydraulic cylinder in-place returning signal, the equipment enters a hydraulic cylinder local back drive stop waiting state and outputs a proportional valve zero signal;

when the 2 rows are in a state of 'hydraulic cylinder local rear-drive stop waiting', the 3 rows enter a 'hydraulic cylinder local rear-drive' state to output a 'proportional valve positive signal'; the control system always monitors a signal that the hydraulic cylinder moves back to the position in the process of 'local back drive of the hydraulic cylinder'; if the control system does not detect the signal of 'hydraulic cylinder back in place', the equipment keeps the 'hydraulic cylinder local back drive' state; when the control system detects a hydraulic cylinder in-place returning signal, the equipment enters a hydraulic cylinder local back drive stop waiting state and outputs a proportional valve zero signal;

when 3 rows are in a state of 'hydraulic cylinder local back driving stopping waiting', starting to execute next stroke action, namely triggering a state of 'hydraulic cylinder local front driving' of 1-3 rows so as to circulate;

③ remote mode: in this mode, the action of the proportional reversing valve belongs to a continuous automatic state; the action logic is consistent with the local mode; the sequential stepping action of the proportional reversing valve is triggered by a grate bed remote driving signal;

automatic tracking control of the action frequency of the hydraulic cylinder:

the speed of the movement of the hydraulic cylinder of the grate cooler hydraulic station is finished by controlling the opening degree of the proportional reversing valve, when the absolute value of a given proportional valve signal is larger, the opening degree of the proportional reversing valve in the corresponding direction is larger, and the speed corresponding to the action of the hydraulic cylinder is higher; the process of the host machine equipment of the grate cooler constantly controls the thickness of the material on the grate bed, which is realized by changing the action frequency of a hydraulic cylinder, namely the stroke frequency of stepping action completed per minute; the control system calculates and obtains theoretical time through required frequency, detects the actual time of the decomposition action of the hydraulic cylinder, constantly adjusts the signal size of the proportional reversing valve according to the deviation of the actual time and the theoretical time and the adjustment rule, and realizes the automatic adjustment and tracking of the action frequency of the hydraulic cylinder;

starting and stopping of the circulating oil pump and the electric heater:

the resistance loss of the hydraulic oil of the hydraulic system is converted into the heat of the hydraulic oil; the hydraulic oil can keep the hydraulic performance within a certain range; when the temperature of the hydraulic oil is too low, the fluidity is poor, and the resistance loss is large; the temperature of the hydraulic oil is too high, the internal leakage amount is increased, and the aging degree of the sealing element is increased;

a debugging mode: in this mode, the start and stop of the circulating oil pump/heater are triggered by two signals of "circulating oil pump/heater start" and "circulating oil pump/heater stop";

when the control system detects a 'starting signal of a circulating oil pump/heater', the equipment enters a 'manual operation of the circulating oil pump/heater' state; when the control system detects a 'stop of circulating oil pump/heater' signal, the equipment enters a 'stop of circulating oil pump/heater' state;

the local mode: in the mode, the start and stop of the circulating oil pump/heater are triggered to act by three signals of 'local oil auxiliary drive', 'oil temperature needs to be increased' and 'oil temperature needs to be reduced';

the local oil auxiliary driving signal is used as an enabling signal, and if the signal is not detected, the automatic cooling function of the circulating pump is cancelled, and the automatic heating function of the heater is cancelled;

when the control system detects a signal that the oil temperature needs to be reduced, the equipment enters a local running state of a circulating pump; when the control system detects a signal that the oil temperature needs to be reduced, the equipment enters a state of stopping a circulating pump;

when the control system detects a signal that the oil temperature needs to be increased, the equipment enters a heater local running state; when the control system detects a signal that the oil temperature needs to be increased, the equipment enters a heater stop state;

③ remote mode: in the mode, the start and stop of the circulating oil pump/heater are triggered to act by three signals of 'auxiliary drive of central control oil', 'oil temperature needs to be increased' and 'oil temperature needs to be reduced'; the action logic is consistent with the local mode;

monitoring and alarming the action time and the process quantities of liquid level, pressure difference, temperature, pressure and the like of the hydraulic cylinder:

after the system is electrified, the control system monitors the forward time of the hydraulic cylinder and judges the signals of filtering differential pressure signaling and oil level lower limit of the oil temperature upper limit; the 'oil temperature is too high' and the 'filter is blocked' are light faults, the 'hydraulic cylinder moves forwards overtime' and the 'oil level is too low' are heavy faults; when the alarm signal occurs, the control system outputs corresponding alarm information;

touch screen monitoring operation:

because the related control and monitoring processes of the system are more, the touch screen is adopted to monitor and operate the equipment state; the touch screen has the functions of on-off operation and state display which can be realized by a common relay control system, and also has character alarm information and process quantity historical records, thereby providing convenience for equipment fault analysis and maintenance operation;

the control system operating method comprises the following steps:

the working condition of the whole grate bed of the grate cooler is known by setting parameters through the touch screen and observing necessary feedback parameters from a configuration picture of the touch screen, so that necessary reference is provided for analyzing some faults;

after the touch screen is electrified and operated, automatically starting a project file, wherein the time is 60S, and viewing a control system initial interface, namely a 'system home page' interface after the start is finished;

clicking an interface selection button on the picture to enter a corresponding operation interface;

the 'equipment state' interface displays the hydraulic principle and the equipment state of the system;

when the 'cabinet monitoring' picture is in a 'local'/'debugging' mode, the picture is used as an operation interface of the hydraulic transmission cabinet;

the operation interface of the cabinet comprises oil pump operation and grate bed operation; when in the 'debugging mode', the manual operation can be carried out on a single row under the 'grate bed operation';

when the remote monitoring picture is in a remote mode, the remote monitoring picture is used as a monitoring interface for controlling automatic operation in hydraulic transmission, and the operation of the cabinet is invalid;

the status indicator lamps in the control panel of each device in the picture mainly comprise buttons of 'ready', 'running', 'fault', 'starting' and 'stopping';

the ready indicator light highlights yellow; indicating that the device has a condition for start-up that has been met, allowing start-up;

the running indicator light is highlighted to display green; indicating that the device has a condition for start-up that has been met, allowing start-up; if gray is displayed, the equipment is in a stop state;

the 'failure' indicator light is highlighted to display red; indicating that the device is in a fault-stopped state; when the equipment fault indicator lamp is turned on, the fault state is kept until the fault is eliminated by a cycle inspection worker, and the equipment can be restarted after the fault confirmation is pressed on the alarm list interface;

when the equipment is ready/allowed to be started, the equipment can be started by clicking a start button;

when the equipment runs, the equipment can be stopped by clicking a stop button;

displaying and recording alarm/fault information of a nearest system on an alarm list picture; when the equipment sends out a comprehensive alarm signal, a patroller needs to be sent to enter the interface to check the equipment alarm information, and after the alarm information is confirmed, an alarm confirmation button is clicked to cancel the comprehensive alarm signal; when the equipment sends out a comprehensive fault signal, a patroller needs to be sent to enter the interface to check the fault information of the equipment, and after the fault is confirmed and eliminated, the comprehensive fault signal can be cancelled by clicking a fault reset button, and the equipment is allowed to be driven again; when the equipment is overhauled again by people, the fault can be reset only by ensuring that the personnel is in a safe state so as to prevent safety accidents caused by self-starting of the equipment

The trend curve interface comprises trend curves of oil temperature, pressure, displacement and the like, and records the state trend of the equipment analog quantity within 1 minute so as to better know the running state of the equipment;

a parameter setting interface, which can set the alarm and enable forbidden grate bed information of the equipment according to the actual condition of the equipment so as to ensure the stability, reliability and safety of the operation of the equipment; the oil temperature control system mainly comprises an upper limit, a lower limit and a lower limit of oil temperature; an upper limit of oil pressure; an upper limit of the spool opening; setting the upper limit, the upper limit and the position of the displacement deviation; the parameters are set by the method which needs administrator authority to modify.

The oil collection port is connected with an oil tank for collecting leaked oil. And a pressure regulating valve 7 is arranged on an oil path connecting the oil pump and the proportional reversing valve.