CN117780734A - Cutter suction dredger hydraulic system with fault self-diagnosis and safety monitoring functions - Google Patents

Abstract

The invention relates to a cutter suction dredger hydraulic system with fault self-diagnosis and safety monitoring, which comprises a reamer hydraulic system, a traversing hydraulic system, a trolley hydraulic system, a main steel pile hydraulic system and an auxiliary steel pile hydraulic system, and also comprises a fault self-diagnosis system for performing fault diagnosis on each hydraulic system; the fault self-diagnosis system includes: the data acquisition module is used for acquiring a plurality of state data of each hydraulic system; the fault diagnosis module is in communication connection with the data acquisition module, and is used for analyzing fault reasons according to the plurality of state data sent by the data acquisition module and the pre-input fault diagnosis logic judgment program and sending the fault diagnosis result to the alarm output module; and the alarm output module is used for outputting fault information. According to the invention, the fault self-diagnosis system collects data information, analyzes fault reasons, indicates the fault type and position of a maintainer and gives maintenance suggestions, so that the maintainer can check the hydraulic system according to the diagnosis result, and the maintenance efficiency and precision are improved.

Description

Cutter suction dredger hydraulic system with fault self-diagnosis and safety monitoring functions

Technical Field

The invention belongs to the technical field of hydraulic systems, and particularly relates to a cutter suction dredger hydraulic system with fault self-diagnosis and safety monitoring.

Background

The cutter suction dredger is characterized in that soil at the river bottom or the sea bottom is loosened by using a rotating reamer, and is mixed with water to form slurry, and the slurry is sucked into a pump body through a suction pipe and is conveyed to a mud discharging area through a mud discharging pipe. When the cutter suction dredger is used for construction, dredging, conveying and discharging are integrated, the cutter suction dredger is completed by itself, and the production efficiency is high.

With the development of the times, the specification and the size of the cutter suction dredger become huge, the hydraulic system and the electric control program thereof are more and more complex, when the cutter suction dredger hydraulic system breaks down, the cutter engineers and the electric engineers with rich experience on the ship are required to judge and solve the problem, the engineers familiar with the hydraulic system of the dredger measure system parameters such as pressure, voltage/resistance and the like through on-site observation and portable instruments such as pressure meters, universal meters and the like, accumulate by virtue of own experience, and identify fault points of the hydraulic system and troubleshoot fault reasons based on fault phenomena and elimination methods. However, the method has the defects of low fault identification accuracy, long maintenance time and the like. With the continuous application of various novel cutter suction dredgers, the product is updated, the element replacement or the system principle is updated, the old experience in the past is not necessarily suitable for new products, the professional experience requirements on staff are higher, and success of each time is not necessarily ensured. Because the mobility of crewman's work is big, and the boats and ships are transferred frequently, have on a certain cutter suction dredger to hydraulic system experience abundant turbine, electrical engineering person when changing the boats and ships or the shift is not on the ship, when other engineers that experience is not abundant meet hydraulic system and break down, be difficult to judge and solve the problem more, seriously influence boats and ships efficiency and engineering progress.

In addition, the hydraulic system of the cutter suction dredger at present is not provided with an oil cleanliness monitoring system, so that the oil cleanliness of the system cannot be mastered in real time, and the safety of equipment is not facilitated. The cutter suction dredger hydraulic system has no oil automatic heating function, is complex in manual operation, has human errors, and causes the risk of overhigh heating temperature. The hydraulic system of the cutter suction dredger does not monitor vibration of important hydraulic elements such as a hydraulic pump and a hydraulic motor, and can not find abnormality of the hydraulic pump and the hydraulic motor in time, so that the hydraulic pump and the hydraulic motor are damaged; the hydraulic system of the cutter suction dredger does not carry out program protection on important dredging equipment such as steel piles and the like, and the steel piles can be damaged due to artificial misoperation or other accidents.

Disclosure of Invention

The invention provides a cutter suction dredger hydraulic system with fault self-diagnosis and safety monitoring for solving the problems in the prior art, when the hydraulic system operates, when a certain system action is executed and faults occur, the fault self-diagnosis system is automatically started, data information of each sensor of the hydraulic system is collected through a data acquisition module and then is sent to a fault diagnosis module, the fault diagnosis module analyzes fault reasons through a pre-input logic judgment program, an alarm output module indicates the fault type and position of a maintainer and gives maintenance advice, and the maintainer checks the hydraulic system according to the diagnosis result, so that the maintenance efficiency and precision are improved; the hydraulic system can monitor main operation parameters of the system, protect important hydraulic elements and dredging equipment, and can perform self-diagnosis on system faults, and give diagnosis conclusion and maintenance guidance.

The invention is realized by a cutter suction dredger hydraulic system with fault self-diagnosis and safety monitoring, comprising: the system comprises a reamer hydraulic system, a traversing hydraulic system, a trolley hydraulic system, a main steel pile hydraulic system, an auxiliary steel pile hydraulic system and a fault self-diagnosis system for performing fault diagnosis on each hydraulic system;

the fault self-diagnosis system includes:

the data acquisition module is used for acquiring a plurality of state data of each hydraulic system;

the fault diagnosis module is in communication connection with the data acquisition module, and is used for analyzing fault reasons according to the plurality of state data sent by the data acquisition module and the pre-input fault diagnosis logic judgment program and sending the fault diagnosis results to the alarm output module;

and the alarm output module is connected with the fault diagnosis module and is used for outputting fault information.

In the above technical solution, preferably, the data acquisition module includes: and the state sensors are arranged on the hydraulic elements and the hydraulic pipelines of the hydraulic systems and are used for collecting a plurality of state data of the hydraulic systems.

In the above technical solution, it is further preferable that the plurality of state sensors include at least one of the following: temperature sensor, liquid level sensor, cleanliness sensor, rotational speed sensor, vibration sensor, pressure sensor, flow sensor, voltage sensor, displacement sensor.

In the above technical scheme, it is further preferable that the cutter suction dredger hydraulic system further comprises a monitoring alarm module, wherein the monitoring alarm module is used for collecting data of each state sensor, and when an actual numerical value of any state sensor changes to a preset alarm value, the monitoring alarm module outputs an alarm through the alarm output module to prompt a maintainer to check a reason and process an alarm.

In the above technical scheme, it is further preferable that the cutter suction dredger hydraulic system further comprises a safety chain protection module, wherein the safety chain protection module is used for collecting state sensor data capable of triggering the action of the cutter suction dredger hydraulic system, and when the state sensor data triggering the action of the cutter suction dredger hydraulic system are collected, the operation of the cutter suction dredger hydraulic system is automatically stopped, and the cutter suction dredger hydraulic system is output to an alarm output module for alarming indication, so that maintenance personnel are prompted to check the alarm and process the alarm.

In the above technical solution, preferably, the fault diagnosis logic judgment program is specifically programmed according to the operation principle of the cutter suction dredger hydraulic system.

In the above technical solution, preferably, the specific process of the fault diagnosis logic judging program is as follows:

firstly, checking whether the rotating speed of a motor of a hydraulic system is normal or not, if so, lighting a red light, prompting a maintainer to check the motor and remove faults, and if so, lighting a green light, and continuing to diagnose the next item;

checking whether the system pressure of the hydraulic system is normal, if so, lighting a red light, prompting a maintainer to check whether the overflow valve group is blocked or the hydraulic pump fails, and removing the failure, if so, lighting a green light, and continuing to diagnose the next item;

checking whether the voltage of a reversing valve bank of the hydraulic system is normal or not, if so, lighting a red light, prompting a maintainer to check the power failure reason of the electromagnetic reversing valve, removing faults, if so, lighting a green light, and continuing to diagnose the next item;

checking whether the pressure of a hydraulic cylinder or a hydraulic motor of the hydraulic system is normal, lighting a red light if abnormal, prompting a maintainer to check whether an electromagnetic reversing valve is blocked or not, and removing faults, if normal, lighting a green light, and outputting a diagnosis result of overlarge external load when the system pressure and the pressure of the hydraulic cylinder or the hydraulic motor reach the maximum safety pressure preset by the system, and prompting the maintainer to confirm whether the faults are caused by overlarge external load.

The invention has the advantages and positive effects that:

(1) The multi-state sensor data acquisition module and the fault diagnosis module can automatically generate fault diagnosis results, wherein a fault diagnosis logic judgment program is compiled according to the operation principle of the cutter suction dredger hydraulic system, so that logic judgment is more accurate and reliable. The fault diagnosis result is output by the alarm output module, the type and the position of the fault are indicated to a maintainer, the maintenance suggestion is given, the maintainer checks the hydraulic system of the cutter suction dredger according to the fault diagnosis result, and the maintenance efficiency and the maintenance precision are improved.

(2) The invention monitors and displays the liquid level, temperature and cleanliness of the hydraulic oil tank in the hydraulic system in real time, and can give out alarm when abnormal. The system has the advantages that the rotation speed of the motor, the vibration of the hydraulic pump, the pressure and flow of the hydraulic system, the rotation speed and vibration of the hydraulic motor, the displacement of the hydraulic cylinder and the like are all monitored and displayed, so that an operator can remotely and clearly observe the internal parameters of each hydraulic system in operation, the operation state of the system can be mastered in real time, the operation condition of the system in a certain period of time can be observed and researched through playback video, and the system is favorable for analyzing and researching faults.

(3) The vibration monitoring device monitors the vibration of the hydraulic pump and the hydraulic motor in the hydraulic system of the cutter suction dredger, can discover the abnormality of the hydraulic pump and the hydraulic motor in advance, reduces the damage of the hydraulic pump and the hydraulic motor, and improves the safety of the hydraulic pump, the hydraulic motor and the whole hydraulic system.

(4) The invention carries out the chain protection on the program control of the main steel pile and the auxiliary steel pile, and when the main steel pile and the auxiliary steel pile drop simultaneously, the program prohibits the traversing winch from executing the action, thereby preventing the steel pile from twisting off caused by traversing ships. The invention simultaneously carries out linkage protection control on the too low liquid level, the too high oil temperature and the too low cleanliness in the hydraulic oil tank, and when the control program receives the signals, the hydraulic system stops running to protect the safety of equipment in the hydraulic system.

(5) The invention configures an automatic heating function for the electric heater in the hydraulic oil tank, when the temperature in the oil tank is lower than a set value, the electric heater is automatically started, and when the oil temperature is increased to the set temperature, the electric heater is stopped. The manual starting program is reduced, automatic heating is realized, and the risk of human misoperation is also reduced.

Drawings

FIG. 1 is a block diagram of a structure provided by an embodiment of the present invention;

FIG. 2 is a schematic diagram of monitoring points of each hydraulic system provided by an embodiment of the present invention;

FIG. 3 is a schematic diagram of a fault diagnosis logic control provided by an embodiment of the present invention;

FIG. 4 is a schematic diagram of a monitoring alarm module provided by an embodiment of the present invention;

fig. 5 is a schematic diagram of a safety chain protection module according to an embodiment of the present invention.

In the figure: 101. a data acquisition module; 102. a safety chain protection module; 103. a monitoring alarm module; 104. a fault diagnosis module; 105. an alarm output module; 201. a reamer pump set vibration sensor; 202. a reamer pump set motor speed sensor; 203. a reamer hydraulic system pressure sensor; 204. a reamer hydraulic system flow sensor; 205. a reamer reversing valve group voltage sensor; 206. a reamer forward rotation pressure sensor; 207. a reamer reversing pressure sensor; 208. a reamer motor rotation speed sensor; 209. a reamer motor vibration sensor; 211. a trolley pump group vibration sensor; 212. a trolley pump group motor rotating speed sensor; 213. a trolley hydraulic system pressure sensor; 214. a trolley hydraulic system flow sensor; 215. the trolley reversing valve group voltage sensor; 216. the trolley extends out of the pressure sensor; 217. the trolley is retracted back to the pressure sensor; 218. a trolley cylinder displacement sensor; 220. a temperature sensor; 221. a liquid level sensor; 222. a cleanliness sensor.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail below with reference to the examples and the accompanying drawings. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.

In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", etc., are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

Referring to fig. 1, an embodiment of the present invention provides a cutter suction dredger hydraulic system with fault self-diagnosis and safety monitoring, which includes a reamer hydraulic system, a traversing hydraulic system, a trolley hydraulic system, a main and auxiliary steel pile hydraulic system, and a fault self-diagnosis system, a monitoring alarm module and a safety interlock protection module for performing fault diagnosis on each hydraulic system.

As shown in fig. 1, the fault self-diagnosis system includes: the data acquisition module 101 is configured to acquire a plurality of status data of each hydraulic system. The fault diagnosis module 104 is in communication connection with the data acquisition module 101, and is configured to analyze a fault cause according to the plurality of status data sent by the data acquisition module 101 and a pre-input fault diagnosis logic judgment program, and send a fault diagnosis result to the alarm output module 105; wherein, the fault diagnosis logic judgment program is compiled by a hydraulic expert according to the operation principle of the cutter suction dredger hydraulic system. And the alarm output module 105 is connected with the fault diagnosis module 104 and is used for outputting fault information, checking and processing the alarm by maintenance personnel, solving the problem and eliminating the alarm.

The data acquisition module comprises: the state sensors are arranged on hydraulic elements and hydraulic pipelines of the hydraulic systems, such as a hydraulic oil tank, a motor, a hydraulic pump, an electromagnetic reversing valve, a hydraulic motor, a hydraulic oil cylinder and the like, and are used for acquiring a plurality of state data of the hydraulic systems. The plurality of state sensors includes: temperature sensor, liquid level sensor, cleanliness sensor, rotational speed sensor, vibration sensor, pressure sensor, flow sensor, voltage sensor, displacement sensor.

Wherein, set up temperature sensor, liquid level sensor, cleanliness sensor in the hydraulic tank, set up vibration sensor on the hydraulic pump, set up vibration sensor, rotation speed sensor on the hydraulic motor, set up displacement sensor on the hydraulic cylinder, set up rotation speed sensor on the motor, set up pressure sensor, voltage sensor on the electromagnetic reversing valve, set up pressure sensor, flow sensor on the hydraulic pipeline between hydraulic pump and the electromagnetic reversing valve.

The monitoring alarm module is used for collecting data of all the state sensors, and when the actual numerical value of any one state sensor changes to a preset alarm value, the monitoring alarm module outputs an alarm through the alarm output module to prompt maintenance personnel to check reasons and process the alarm.

The safety chain protection module is used for collecting state sensor data capable of triggering the action of the safety chain protection module, and when the state sensor data triggering the action of the safety chain protection module are collected, the operation of the cutter suction dredger hydraulic system is automatically stopped and is output to the alarm output module for alarm indication, so that maintenance personnel are prompted to check the alarm and process the alarm.

In order to better understand the above embodiments of the present invention, the following further details of the three parts of the self-diagnosis of the fault, the daily monitoring alarm and the safety interlock protection of the program control will be described.

As shown in fig. 2 and 3, illustrating the fault diagnosis principle, for example, after the operator issues a "forward rotation" command of the reamer, the reamer does not rotate forward, and the control program automatically starts the fault self-diagnosis function after a delay of 10 seconds by collecting the value of the reamer motor rotation speed sensor 208 to be 0. When the reamer motor cannot rotate forward:

step one, the data acquisition module 101 acquires the rotation speed of the reamer pump set motor rotation speed sensor 202, compares the rotation speed with a preset value (namely the rotation speed of the reamer pump set motor when the reamer hydraulic system is in normal operation), if the rotation speed deviation is greater than 50%, the fault diagnosis module 104 outputs a diagnosis result, and lights a red light after the 'normal rotation speed of the reamer motor', so as to prompt a maintenance personnel to check the reamer motor and remove faults. If the rotational speed deviation is less than 20%, the fault diagnosis module 104 outputs a diagnosis result, and a green light is turned on after the "whether the rotational speed of the reamer motor is normal".

Step two, the pressure of the reamer hydraulic system pressure sensor 203 is collected through the data collection module 101, compared with a preset value (namely the reamer hydraulic system pressure when the reamer hydraulic system is in normal operation), if the pressure deviation is greater than 50%, the fault diagnosis module 104 outputs a diagnosis result, and a red light is lighted behind the 'whether the reamer hydraulic system pressure is normal', so that maintenance personnel is prompted to check whether an overflow valve group in a reamer pump group is blocked or the reamer hydraulic pump is out of order. If the pressure deviation is less than 20%, the fault diagnosis module 104 outputs a diagnosis result, and a green light is turned on after the "whether the reamer hydraulic system pressure is normal".

Step three, the voltage of the reamer reversing valve bank voltage sensor 205 is collected through the data collection module 101 and compared with a preset value (namely, the voltage value of the reamer reversing valve bank when the reamer hydraulic system is in normal operation), if the voltage deviation is greater than 50%, the fault diagnosis module 104 outputs a diagnosis result, and a red light is lighted behind the 'reamer reversing valve bank voltage is normal', so that maintenance personnel are prompted to check the power failure reason of the electromagnetic reversing valve of the reamer hydraulic system, check whether a fuse of the electromagnetic reversing valve is broken or not, whether a program command is output or not, whether an electromagnetic plug is loose or not and the like, and the fault is eliminated. If the voltage deviation is less than 20%, the fault diagnosis module 104 outputs a diagnosis result, and a green light is turned on after the "normal voltage of the reamer reversing valve group".

And step four, the data acquisition module 101 acquires the pressure of the reamer forward rotation pressure sensor 206, compares the pressure with a preset value (namely the reamer forward rotation pressure when the reamer hydraulic system is in normal operation), and if the pressure deviation is greater than 50%, the fault diagnosis module 104 outputs a diagnosis result, and lights a red light after the 'reamer forward rotation pressure is normal', so as to prompt a maintainer to check whether the electromagnetic reversing valve is blocked or not and remove faults. If the pressure deviation is less than 20%, the fault diagnosis module 104 outputs a diagnosis result, and a green light is turned on after the "normal reamer forward rotation pressure.

Step five, through the data acquisition module 101, the deviation between the rotating speed of the rotating speed sensor 202 of the reamer pump set motor and the voltage of the voltage sensor 205 of the reamer reversing valve group and a preset value is less than 20%, and the pressure of the pressure sensor 203 of the reamer hydraulic system and the pressure of the pressure sensor 206 of the reamer forward rotation reach the preset maximum safety pressure of the system, the fault diagnosis module 104 outputs a diagnosis result of 'overload on the outer load', and reminds a maintainer to confirm whether the overload is caused by the fact that the reamer motor cannot rotate forward.

As shown in fig. 2 and 3, the fault diagnosis principle is further illustrated, for example, after the operator issues a trolley cylinder extension command, the trolley cylinder cannot be extended, and the control program automatically starts the fault self-diagnosis function after a delay of 10 seconds by collecting the value of the trolley cylinder displacement sensor 218 as 0. When the trolley cylinder cannot extend:

step one, the data acquisition module 101 acquires the rotation speed of the motor rotation speed sensor 212 of the trolley pump set, compares the rotation speed with a preset value (namely the rotation speed of the motor of the trolley pump set when the trolley hydraulic system is in normal operation), and if the rotation speed deviation is greater than 50%, the fault diagnosis module 104 outputs a diagnosis result, and the red light is lighted at the back of the 'whether the rotation speed of the trolley motor is normal'. And prompting a maintenance person to check the trolley motor and remove the fault. If the rotational speed deviation is less than 20%, the fault diagnosis module 104 outputs a diagnosis result, "whether the rotational speed of the carriage motor is normal" and lights a green light.

Step two, the data acquisition module 101 acquires the pressure of the trolley hydraulic system pressure sensor 213, compares the pressure with a preset value (namely the pressure of the trolley hydraulic system when the trolley hydraulic system is in normal operation), and if the pressure deviation is greater than 50%, the fault diagnosis module 104 outputs a diagnosis result, and the red light is lighted behind the "whether the pressure of the trolley hydraulic system is normal". Prompting maintenance personnel to check whether the overflow valve group in the trolley pump group is blocked or the trolley hydraulic pump fails, and eliminating the failure. If the pressure deviation is less than 20%, the fault diagnosis module 104 outputs a diagnosis result, and a green light is turned on after "whether the pressure of the trolley hydraulic system is normal".

Step three, the voltage of the trolley reversing valve bank voltage sensor 215 is collected through the data collection module 101 and compared with a preset value (namely, the trolley reversing valve bank voltage value when the trolley hydraulic system is in normal operation), if the voltage deviation is greater than 50%, the fault diagnosis module 104 outputs a diagnosis result, and if the trolley reversing valve bank voltage is normal, a red light is lighted at the back, a maintenance person is prompted to check the power failure reason of the electromagnetic reversing valve of the trolley hydraulic system, whether the fuse of the electromagnetic reversing valve is broken or not, whether a program command is output or not, whether an electromagnetic plug is loose or not and other reasons are removed. If the voltage deviation is less than 20%, the fault diagnosis module 104 outputs a diagnosis result, and a green light is turned on after the "whether the trolley reversing valve bank voltage is normal".

Step four, the data acquisition module 101 acquires the pressure of the trolley extending pressure sensor 216, compares the pressure with a preset value (namely, the trolley extending pressure when the trolley hydraulic system operates normally), and if the pressure deviation is greater than 50%, the fault diagnosis module 104 outputs a diagnosis result, and the red light is lighted at the back of the "whether the trolley extending pressure is normal". Prompting maintenance personnel to check whether the electromagnetic reversing valve is stuck or not and removing faults. If the pressure deviation is less than 20%, the fault diagnosis module 104 outputs a diagnosis result, and a green light is turned on after "whether the trolley extension pressure is normal".

Step five, through the data acquisition module 101, the deviation between the rotating speed of the motor rotating speed sensor 212 of the trolley pump set and the voltage of the trolley reversing valve group voltage sensor 215 is less than 20% from a preset value, and the pressure of the trolley hydraulic system pressure sensor 213 and the pressure of the trolley stretching pressure sensor 216 reach the maximum safety pressure preset by the system, the fault diagnosis module 104 outputs a diagnosis result of 'overload on external load', and reminds a maintainer to confirm whether the overload is caused by the fact that the trolley oil cylinder cannot stretch out.

As shown in fig. 2 and 3, the failure diagnosis principle of the reamer motor being unable to reverse, the traverse motor being unable to move left, the traverse motor being unable to move right, and the carriage cylinder being unable to retract is the same as the principle of the reamer motor being unable to rotate forward, and will not be described in detail here. In addition, the action fault diagnosis principles of the main and auxiliary steel pile pouring, lifting and clamping devices are the same as above, and detailed description is not given.

As shown in fig. 1 to fig. 4, the monitoring alarm module 103 is configured to collect data of each status sensor, and when an actual numerical value of any status sensor changes to a preset alarm value, the monitoring alarm module outputs an alarm through the alarm output module 105, so as to prompt a maintainer to check a cause and process the alarm, solve a problem, and eliminate the alarm. Each of the status sensors includes: temperature sensor 220, level sensor 221, cleanliness sensor 222, vibration sensors of all hydraulic pumps and hydraulic motors, all hydraulic ram displacement sensors, rotational speed sensors of all motors and hydraulic motors, all reversing valve voltage sensors and pressure sensors, all hydraulic system pressure sensors and flow sensors.

Among them, the temperature sensor 220 mainly functions: 1. outputting a digital signal; 2. when the oil temperature is lower than a 'start preset value', the electric heater in the hydraulic oil tank is automatically started, and when the oil temperature is raised to a 'stop preset value', the electric heater is automatically stopped.

The liquid level sensor 221 has the main functions of: 1. outputting a digital signal; 2. when the liquid level is higher than a high liquid level preset value, outputting a warning; 3. and outputting a warning when the liquid level is lower than a low liquid level preset value.

The cleanliness sensor 222 has the main functions of: 1. outputting a digital signal; 2. and outputting a warning when the cleanliness level is lower than a low-level preset value.

The vibration sensors of all hydraulic pumps and hydraulic motors mainly function as: 1. outputting a digital signal; 2. and outputting a warning when the vibration value is detected to be higher than a preset value.

All hydraulic cylinder displacement sensors, all motor and hydraulic motor's rotational speed sensor, all reversing valve group voltage sensor and pressure sensor, all hydraulic system pressure sensor and flow sensor all have digital signal output.

As shown in fig. 1 to 5, the safety chain protection module 102 is configured to collect the status sensor data that can trigger the action of the safety chain protection module, and when the status sensor data that triggers the action of the safety chain protection module is collected, automatically stop the operation of the cutter suction dredger hydraulic system and output an alarm indication to the alarm output module 105, and then the maintainer checks the alarm and processes the alarm, thereby solving the problem and eliminating the alarm. The safety interlocking protection function can protect the safety of the hydraulic system of the cutter suction dredger, the safety of important hydraulic components such as a hydraulic pump, a hydraulic motor and the like, protect the steel pile, prevent the steel pile from being broken and dangerous, and prevent the oil from being leaked from a small oil tank of the main steel pile and the auxiliary steel pile.

The specific program control content is as follows:

1. when the liquid level sensor 221 detects that the liquid level of the hydraulic oil tank is too low, the operation of the hydraulic system is automatically stopped, and an alarm is given.

2. When the cleanliness sensor 222 detects that the cleanliness level is too low, the hydraulic system is automatically stopped and an alarm is given.

3. When the temperature sensor 220 detects that the oil temperature is too high, the operation of the hydraulic system is automatically stopped and an alarm is given.

4. And the left steel pile and the right steel pile are landed, so that the transverse movement is not allowed to be executed.

5. And if the liquid level of the small oil tank of the main and auxiliary steel piles is high, the main and auxiliary steel piles are not allowed to execute the descending action.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments may be modified or some or all of the technical features may be replaced equivalently, and these modifications or replacements do not make the essence of the corresponding technical scheme deviate from the scope of the technical scheme of the embodiments of the present invention.

Claims (7)

1. A cutter suction dredger hydraulic system with fault self-diagnosis and safety monitoring comprises a reamer hydraulic system, a sideslip hydraulic system, a trolley hydraulic system and a main and auxiliary steel pile hydraulic system; the hydraulic system is characterized by further comprising a fault self-diagnosis system for performing fault diagnosis on each hydraulic system;

the fault self-diagnosis system includes:

the data acquisition module is used for acquiring a plurality of state data of each hydraulic system;

the fault diagnosis module is in communication connection with the data acquisition module, and is used for analyzing fault reasons according to the plurality of state data sent by the data acquisition module and the pre-input fault diagnosis logic judgment program and sending the fault diagnosis results to the alarm output module;

and the alarm output module is connected with the fault diagnosis module and is used for outputting fault information.

2. The cutter suction dredger hydraulic system with fault self-diagnosis and safety monitoring of claim 1, wherein the data acquisition module comprises: and the state sensors are arranged on the hydraulic elements and the hydraulic pipelines of the hydraulic systems and are used for collecting a plurality of state data of the hydraulic systems.

3. The cutter suction dredger hydraulic system with fault self-diagnosis and safety monitoring of claim 2, wherein the plurality of status sensors includes at least one of: temperature sensor, liquid level sensor, cleanliness sensor, rotational speed sensor, vibration sensor, pressure sensor, flow sensor, voltage sensor, displacement sensor.

4. The cutter suction dredger hydraulic system with fault self-diagnosis and safety monitoring according to claim 2, further comprising a monitoring alarm module for collecting data of each status sensor, and when the actual value of any status sensor changes to a preset alarm value, the monitoring alarm module outputs an alarm to prompt a maintainer to check the reason and process the alarm.

5. The cutter suction dredger hydraulic system with fault self-diagnosis and safety monitoring according to claim 2, further comprising a safety chain protection module, wherein the safety chain protection module is used for collecting state sensor data capable of triggering the action of the cutter suction dredger hydraulic system, and when the state sensor data triggering the action of the safety chain protection module is collected, the operation of the cutter suction dredger hydraulic system is automatically stopped, and the cutter suction dredger hydraulic system outputs an alarm indication to an alarm output module, so that maintenance personnel are prompted to check an alarm and process the alarm.

6. The cutter suction dredger hydraulic system with fault self-diagnosis and safety monitoring according to claim 1, wherein the fault diagnosis logic judgment program is specifically programmed according to the operation principle of the cutter suction dredger hydraulic system.

7. The cutter suction dredger hydraulic system with fault self-diagnosis and safety monitoring according to claim 1, wherein the specific process of the fault diagnosis logic judging program is as follows:

firstly, checking whether the rotating speed of a motor of a hydraulic system is normal or not, if so, lighting a red light, prompting a maintainer to check the motor and remove faults, and if so, lighting a green light, and continuing to diagnose the next item;

checking whether the system pressure of the hydraulic system is normal, if so, lighting a red light, prompting a maintainer to check whether the overflow valve group is blocked or the hydraulic pump fails, and removing the failure, if so, lighting a green light, and continuing to diagnose the next item;

checking whether the voltage of a reversing valve bank of the hydraulic system is normal or not, if so, lighting a red light, prompting a maintainer to check the power failure reason of the electromagnetic reversing valve, removing faults, if so, lighting a green light, and continuing to diagnose the next item;

checking whether the pressure of a hydraulic cylinder or a hydraulic motor of the hydraulic system is normal, lighting a red light if abnormal, prompting a maintainer to check whether an electromagnetic reversing valve is blocked or not, and removing faults, if normal, lighting a green light, and outputting a diagnosis result of overlarge external load when the system pressure and the pressure of the hydraulic cylinder or the hydraulic motor reach the maximum safety pressure preset by the system, and prompting the maintainer to confirm whether the faults are caused by overlarge external load.