阅读说明：本技术 一种基于排涝车的液压电控集成控制装置 (Hydraulic electronic control integrated control device based on drainage vehicle ) 是由 马鸿军 赵石磊 肖军伟 张锦川 于 2021-07-10 设计创作，主要内容包括：本发明涉及一种基于排涝车的液压电控集成控制装置,包括排涝车、油管绞盘和水带绞盘,排涝车包括用于运输的大车和设置于大车内部用于现场排水的小车及排水泵组；排涝车设置有液压控制单元,液压控制单元连接小车、排水泵组、油管绞盘和水带绞盘,液压控制单元用于驱动排涝车完成排涝作业,液压控制单元设置有PLC控制单元和检测单元,检测单元用于实时检测液压控制单元的压力参数,PLC控制单元的模拟输入端连接检测单元,PLC控制单元根据检测单元输入检测参数采用PID控制方法调节液压控制单元工作状态。本发明采用液压控制提高了设备适用性,结合PLC控制单元采用PID控制方法实现智能化集中控制,提高了抢险的效率,减轻了排涝作业的危险。(The invention relates to a hydraulic electric control integrated control device based on a waterlogging draining truck, which comprises the waterlogging draining truck, an oil pipe winch and a water hose winch, wherein the waterlogging draining truck comprises a truck for transportation, a trolley arranged in the truck for field drainage and a drainage pump set; the drainage truck is provided with a hydraulic control unit, the hydraulic control unit is connected with the trolley, the drainage pump set, the oil pipe winch and the hose winch, the hydraulic control unit is used for driving the drainage truck to complete drainage operation, the hydraulic control unit is provided with a PLC control unit and a detection unit, the detection unit is used for detecting pressure parameters of the hydraulic control unit in real time, the simulation input end of the PLC control unit is connected with the detection unit, and the PLC control unit adopts a PID control method to adjust the working state of the hydraulic control unit according to the input detection parameters of the detection unit. The invention adopts hydraulic control to improve the applicability of equipment, and adopts a PID control method to realize intelligent centralized control by combining with a PLC control unit, thereby improving the emergency efficiency and reducing the danger of drainage operation.)

1. A hydraulic electric control integrated control device based on a drainage truck comprises the drainage truck, an oil pipe winch and a water hose winch, and is characterized in that the drainage truck comprises a truck for transportation, a trolley arranged in the truck for on-site drainage and a drainage pump set;

the waterlogging draining vehicle is provided with a hydraulic control unit, the hydraulic control unit is connected with a trolley, a draining pump set, an oil pipe winch and a water hose winch and is used for driving the waterlogging draining vehicle to complete waterlogging draining operation, the hydraulic control unit is provided with a PLC (programmable logic controller) control unit (1) and a detection unit, the detection unit is used for detecting pressure parameters of the hydraulic control unit in real time, the analog input end of the PLC control unit (1) is connected with the detection unit, and the PLC control unit (1) adjusts the working state of the hydraulic control unit by adopting a PID (proportion integration differentiation) control method according to the detection parameters input by the detection unit;

the cart comprises an engine and an engine control module, the engine control module is in communication connection with the PLC control unit (1) through a CAN bus, and the engine control module is used for providing kinetic energy for the drainage pump group by controlling the rotating speed of the engine.

2. The hydraulic and electric control integrated control device based on the waterlogging vehicle as claimed in claim 1, wherein the hydraulic control unit comprises a drainage pump driving module, the drainage pump driving module comprises a hydraulic pump outlet valve group (3) and a control oil path (4), and the drainage pump group comprises two one-way variable hydraulic pumps (2);

the one-way variable hydraulic pump (2) is connected with a hydraulic pump outlet valve group (3), the other side of the one-way variable hydraulic pump (2) is connected with a hydraulic oil tank, the control oil circuit (4) is used for adjusting the pressure parameter of the one-way variable hydraulic pump (2),

the drainage pump driving module is provided with a power takeoff, and the other end of the power takeoff is connected with an engine.

3. The hydraulic electric control integrated control device based on the waterlogging draining vehicle is characterized in that the hydraulic control unit comprises a trolley valve group (8), wherein the trolley valve group (8) is used for driving a trolley to move autonomously and enabling a drainage pump group to be in a drainage position;

the trolley is a crawler-type trolley and comprises a left-going motor (6) and a right-going motor (7), and the left-going motor (6) and the right-going motor (7) are both connected with a trolley valve group (8);

the trolley is provided with a horizontal pushing mechanism and a lifting mechanism, the horizontal pushing mechanism is used for moving the drainage pump set in the horizontal direction, and the lifting mechanism is used for driving the drainage pump set to overturn so that a water inlet of the drainage pump set is immersed into the water surface;

the flat push mechanism is provided with flat push hydro-cylinder (9), lifting mechanism is provided with lift cylinder (10), flat push hydro-cylinder (9) and lift cylinder (10) all are connected with dolly valves (8), dolly valves (8) include a plurality of four-way electro-hydraulic servo valves, four-way electro-hydraulic servo valves connect oil tank, left side motor (6), right side motor (7), flat push hydro-cylinder (9) and lift cylinder (10) respectively, and PLC the control unit (1) is connected to the electrical control end of four-way electro-hydraulic servo valve.

4. The hydraulic electric control integrated control device based on the waterlogging draining vehicle as claimed in claim 1, wherein the oil pipe winch is arranged inside the cart, the oil pipe winch is used for extending the oil pipe and enabling the oil pipe to move along with the cart to supply oil to the cart and the draining pump set, and the oil pipe winch comprises a bidirectional motor (11);

the hydraulic control unit comprises an oil pipe hinged disk valve group (12), the oil pipe hinged disk valve group (12) is connected with a two-way motor (11), the oil pipe hinged disk valve group (12) comprises four electrified hydraulic servo valves and reversing valves, the two-way motor (11) is connected with the four electrified hydraulic servo valves through the reversing valves to be connected into a hydraulic oil tank, and the electric control ends of the four electrified hydraulic servo valves are connected with a PLC control unit (1).

5. The hydraulic electric control integrated control device based on the waterlogging draining vehicle as claimed in claim 1, wherein a tail gate is arranged at the tail of the truck, the tail gate is hinged with the truck, and a tail gate oil cylinder (13) for driving the tail gate to open and close is arranged on the tail gate;

the cart is provided with a plurality of water hose winches for driving the water hoses to move along with the cart, and the water hose winches are provided with second bidirectional motors (14);

a rolling door is arranged on the side part of the cart, a hose winch landing mechanism for driving a hose winch and a water outlet end of a hose to move downwards is arranged at the rolling door, the hose winch landing mechanism comprises a landing oil cylinder (15),

the hydraulic control unit comprises a water hose winch reversing valve group (17), and the water hose winch reversing valve group (17) comprises a reversing valve and a four-way electro-hydraulic servo valve;

the tail gate oil cylinder (13) and the floor oil cylinder (15) are connected with a reversing valve and are connected with a four-way electro-hydraulic servo valve through a double-hydraulic control one-way valve, and a plurality of second bidirectional motors (14) are connected with the same reversing valve in parallel and are connected with the four-way electro-hydraulic servo valve through the reversing valve;

the tail gate oil cylinder (13), the floor oil cylinder (15) and the second bidirectional motor (14) are connected with the hydraulic oil tank through the four-way electro-hydraulic servo valve, and the electric control end of the four-way electro-hydraulic servo valve is connected with the PLC control unit (1).

6. The hydraulic electric control integrated control device based on the drainage truck as claimed in any one of claims 1 to 5, wherein the detection unit comprises a plurality of pressure sensors (16), the plurality of pressure sensors are respectively arranged at the outlet valve group (3) position of the hydraulic pump and the outlet position of the hydraulic oil tank, and the output end of the pressure sensor (16) is connected with the analog output end of the PLC control unit (1).

7. The hydraulic electric control integrated control device based on the drainage truck as claimed in claim 6, wherein the PLC control unit (1) comprises a PLC controller, a frequency converter and an upper computer, the PLC controller is in communication connection with the engine control module through a CAN bus, the digital output end of the PLC controller is connected with the frequency converter, and the PLC controller is connected with the four-way electro-hydraulic servo valve of the trolley valve group (8), the oil pipe hinged plate valve group (12) and the water hose winch reversing valve group (17) through the frequency converter.

8. The hydraulic electric control integrated control device based on the drainage truck as claimed in claim 7, wherein the upper computer comprises a PC, a key module and a remote control module, the PC is in communication connection with the PLC, and the PC is used for setting internal programs of the PLC;

PC machine communication connection button module, button module is used for transmitting external control instruction, button module includes MUC chip (18) and presses button group (19), MUC chip (18) are provided with communication module (20), communication module (20) are one kind or multiple combination of USB serial ports, RS232 serial ports, WIFI module, bluetooth module, and MUC chip (18) pass through communication module (20) and PC machine communication connection, the IO mouth of communication module (20) is connected and is pressed button group (19).

9. The hydraulic electric control integrated control device based on the drainage vehicle as claimed in claim 8, wherein the remote control module comprises a touch screen industrial personal computer (21), the touch screen industrial personal computer (21) is in communication connection with a PC through one or more combinations of a WIFI module, a Bluetooth module and a radio frequency module, and the remote control module is used for remotely sending an external control instruction to the PC.

Technical Field

The invention belongs to the field of special vehicles, and particularly relates to a hydraulic electronic control integrated control device based on a drainage vehicle.

Background

Along with the continuous development of the automobile market, the types of special vehicles are continuously increased, the types of fire rescue vehicles are gradually updated, various rescue scenes are covered, wherein the flood drainage vehicle is one of the fire rescue vehicles, flood rescue is used as a rescue type with a large fire rescue difficulty coefficient, and the flood drainage vehicle is rapidly developed in recent years for ensuring the personal safety of rescue personnel to the maximum extent.

The existing waterlogging draining vehicle comprises a vehicle body and a draining pump set, wherein the conventional waterlogging draining vehicle is a truck or a truck, the draining pump set is arranged in a carriage or a rear bucket, the waterlogging draining vehicle is driven to a draining position during operation, a water belt is placed in water, and the draining operation is finished by supplying power to the draining pump set, so that manual water draining operation is avoided;

however, the existing drainage truck still has some problems in use, firstly, the drainage truck is still a fuel oil truck or a new energy truck in nature, the driving of a drainage pump set of the drainage truck depends on electric energy generated by a fuel oil engine or an electric motor, the fuel oil engine or the electric motor cannot work in a water environment for a long time, particularly in a scene of partial immersion in water, the drainage performance of the existing drainage truck is severely limited under the condition of complex field environment, secondly, the existing drainage truck at least needs more than two workers to work in a matching way, and the working risk coefficient is larger due to drainage work and danger.

Disclosure of Invention

The invention aims to solve the problems and provides a hydraulic and electric control integrated control device based on a waterlogging draining vehicle, which is provided with a trolley for draining waterlogging and a waterlogging draining pump set, wherein the trolley drives the waterlogging draining pump set to a drainage position, the trolley and the waterlogging pump set are hydraulically controlled, the applicability of equipment is improved, intelligent centralized control is realized by combining a PLC (programmable logic controller) control unit and adopting a PID (proportion integration differentiation) control method, the emergency efficiency is improved, and the danger of waterlogging draining operation is reduced.

In order to achieve the purpose, the technical scheme of the invention is as follows:

a hydraulic electric control integrated control device based on a drainage truck comprises the drainage truck, an oil pipe winch and a water hose winch, wherein the drainage truck comprises a cart for transportation, a trolley arranged in the cart and used for on-site drainage, and a drainage pump set;

the waterlogging car is provided with a hydraulic control unit, the hydraulic control unit is connected with the trolley, the drainage pump set, the oil pipe winch and the water hose winch and is used for driving the waterlogging car to complete waterlogging operation, the hydraulic control unit is provided with a PLC (programmable logic controller) control unit and a detection unit, the detection unit is used for detecting pressure parameters of the hydraulic control unit in real time, the analog input end of the PLC control unit is connected with the detection unit, and the PLC control unit adjusts the working state of the hydraulic control unit by adopting a PID (proportion integration differentiation) control method according to the detection parameters input by the detection unit;

the cart comprises an engine and an engine control module, the engine control module is in communication connection with the PLC through a CAN bus, and the engine control module is used for providing kinetic energy for the drainage pump group by controlling the rotating speed of the engine.

Further, the hydraulic control unit comprises a drain pump driving module, the drain pump driving module comprises a hydraulic pump outlet valve group and a control oil path, and the drain pump group comprises two one-way variable hydraulic pumps;

the one-way variable hydraulic pump is connected with an outlet valve group of the hydraulic pump, the other side of the one-way variable hydraulic pump is connected with a hydraulic oil tank, the control oil path is used for adjusting the pressure parameter of the one-way variable hydraulic pump,

the drainage pump driving module is provided with a power takeoff, and the other end of the power takeoff is connected with an engine.

Furthermore, the hydraulic control unit comprises a trolley valve group, and the trolley valve group is used for driving a trolley to move autonomously and enabling the drainage pump group to be in a drainage position;

the trolley is a crawler-type trolley and comprises a left-going motor and a right-going motor, and the left-going motor and the right-going motor are both connected with the trolley valve group;

the trolley is provided with a horizontal pushing mechanism and a lifting mechanism, the horizontal pushing mechanism is used for moving the drainage pump set in the horizontal direction, and the lifting mechanism is used for driving the drainage pump set to overturn so that a water inlet of the drainage pump set is immersed into the water surface;

the flat push mechanism is provided with the flat push hydro-cylinder, lifting mechanism is provided with lift cylinder, the flat push hydro-cylinder all is connected with dolly valves with lift cylinder, dolly valves includes a plurality of four logical electrohydraulic servo valves, four logical electrohydraulic servo valves connect oil tank, left side motor, right side motor, flat push hydro-cylinder and lift cylinder respectively, and PLC the control unit is connected to four logical electrohydraulic servo valve's electrical control end.

Furthermore, the oil pipe winch is arranged in the cart, the oil pipe winch is used for extending the oil pipe and enabling the oil pipe to move along with the cart to supply oil for the cart and the drainage pump set, and the oil pipe winch comprises a bidirectional motor;

the hydraulic control unit comprises an oil pipe hinged disk valve group, the oil pipe hinged disk valve group is connected with a two-way motor, the oil pipe hinged disk valve group comprises a four-way electro-hydraulic servo valve and a reversing valve, the two-way motor is connected with the four-way electro-hydraulic servo valve through the reversing valve and connected into a hydraulic oil tank, and the electrical control end of the four-way electro-hydraulic servo valve is connected with the PLC control unit.

Furthermore, a tail door is arranged at the tail part of the cart and is hinged with the cart, and a tail door oil cylinder for driving the tail door to open and close is arranged on the tail door;

the cart is provided with a plurality of water hose winches for driving the water hoses to move along with the cart, and the water hose winches are provided with second bidirectional motors;

the side part of the cart is provided with a rolling door, the rolling door is provided with a hose winch landing mechanism for driving a hose winch and a water outlet end of a hose to move downwards, the hose winch landing mechanism comprises a landing oil cylinder,

the hydraulic control unit comprises a water hose winch reversing valve group, and the water hose winch reversing valve group comprises a reversing valve and a four-way electro-hydraulic servo valve;

the tail gate oil cylinder and the floor oil cylinder are connected with a reversing valve and are connected with a four-way electro-hydraulic servo valve through a double-hydraulic control one-way valve, and the same reversing valve is connected among a plurality of second bidirectional motors in parallel and is connected with the four-way electro-hydraulic servo valve through the reversing valve;

the tail gate oil cylinder, the floor oil cylinder and the second bidirectional motor are connected with the hydraulic oil tank through the four-way electro-hydraulic servo valve, and the electric control end of the four-way electro-hydraulic servo valve is connected with the PLC control unit.

Further, the detecting unit comprises a plurality of pressure sensors, the pressure sensors are respectively arranged at the outlet valve group position of the hydraulic pump and the outlet position of the hydraulic oil tank, and the output ends of the pressure sensors are connected with the simulation output end of the PLC control unit.

Furthermore, the PLC control unit comprises a PLC controller, a frequency converter and an upper computer, the PLC controller is in communication connection with the engine control module through a CAN bus, the digital output end of the PLC controller is connected with the frequency converter, and the PLC controller is connected with the four-way electro-hydraulic servo valve of the trolley valve group, the oil pipe hinged disc valve group and the water hose winch reversing valve group through the frequency converter.

Further, the upper computer comprises a PC, a key module and a remote control module, the PC is in communication connection with the PLC, and the PC is used for setting an internal program of the PLC;

PC machine communication connection button module, button module is used for transmitting external control instruction, button module includes the MUC chip and presses the key group, the MUC chip is provided with communication module, communication module is one or more combinations of USB serial ports, RS232 serial ports, WIFI module, bluetooth module, and the MUC chip passes through communication module and PC machine communication connection, communication module's IO mouth is connected and is pressed the key group.

Furthermore, the remote control module comprises a touch screen industrial personal computer which is in communication connection with the PC through one or more combinations of the WIFI module, the Bluetooth module and the radio frequency module, and the remote control module is used for remotely sending an external control instruction to the PC.

Through the technical scheme, the invention has the beneficial effects that:

1. the invention adopts hydraulic control, the waterlogging draining truck comprises a truck for transportation, a trolley arranged in the truck for field drainage and a drainage pump set, the trolley and the drainage pump set are transported by the truck to the vicinity of a drainage point during operation, the drainage pump set is carried by the trolley to move to a drainage position, the damage of the truck (a fuel truck and a new energy truck) when entering water is avoided, and the trolley and the drainage pump set are driven by hydraulic pressure during the whole operation process, so that the operation is safe.

The drainage truck is provided with a hydraulic control unit, the hydraulic control unit is connected with the trolley, the drainage pump set, the oil pipe winch and the water hose winch, and the hydraulic control unit is used for driving the drainage truck to complete drainage operation.

The trolley, the drainage pump set, the oil pipe winch and the water hose winch are respectively controlled to realize various action combinations, and the trolley is flexible to use and can be matched with the field environment.

2. The hydraulic control unit is provided with a PLC control unit and a detection unit, wherein the detection unit is used for detecting the pressure parameters of the hydraulic control unit in real time, the analog input end of the PLC control unit is connected with the detection unit, and the PLC control unit adjusts the working state of the hydraulic control unit by adopting a PID control method according to the detection parameters input by the detection unit;

during operation, the operation of workers is simple and convenient, the internal oil pressure of the hydraulic control unit is automatically adjusted according to the work order, manual operation is not needed except for the work order during drainage operation, the working flow of the drainage vehicle operation is greatly simplified, and the operation safety and the operation efficiency are improved.

Drawings

FIG. 1 is a system schematic diagram of a hydraulic and electric control integrated control device based on a drainage truck of the invention;

FIG. 2 is a hydraulic schematic diagram of a hydraulic and electric control integrated control device based on a drainage truck according to the invention;

reference numerals: the hydraulic control system comprises a PLC (programmable logic controller) control unit 1, a one-way variable hydraulic pump 2, a hydraulic pump outlet valve bank 3, a control oil circuit 4, a left-going motor 6, a right-going motor 7, a trolley valve bank 8, a horizontal pushing oil cylinder 9, a lifting oil cylinder 10, a two-way motor 11, an oil pipe hinged disk valve bank 12, a tail gate oil cylinder 13, a second two-way motor 14, a landing oil cylinder 15, a pressure sensor 16, a water hose winch reversing valve bank 17, an MUC (micro-controller) chip 18, a key bank 19, a communication module 20 and a touch screen industrial personal computer 21.

Detailed Description

The invention is further described with reference to the following figures and detailed description:

example 1

As shown in fig. 1-2, the invention provides a hydraulic electric control integrated control device based on a waterlogging truck, which comprises the waterlogging truck, an oil pipe winch and a water hose winch, wherein the waterlogging truck comprises a cart for transportation, a trolley arranged in the cart and used for field drainage, and a drainage pump set;

the waterlogging car is provided with a hydraulic control unit, the hydraulic control unit is connected with the trolley, the drainage pump set, the oil pipe winch and the water hose winch and is used for driving the waterlogging car to complete waterlogging operation, the hydraulic control unit is provided with a PLC (programmable logic controller) control unit 1 and a detection unit, the detection unit is used for detecting pressure parameters of the hydraulic control unit in real time, the simulation input end of the PLC control unit 1 is connected with the detection unit, and the PLC control unit 1 adjusts the working state of the hydraulic control unit by adopting a PID (proportion integration differentiation) control method according to the detection parameters input by the detection unit;

the cart comprises an engine and an engine control module, the engine control module is in communication connection with the PLC control unit 1 through a CAN bus, and the engine control module is used for providing kinetic energy for the drainage pump group by controlling the rotating speed of the engine.

In order to avoid the problems that a drainage truck is damaged when entering water and cannot be matched with a drainage environment due to overlarge body shape, the trolley is arranged to bear the drainage pump set to the drainage position, and meanwhile, the trolley and the drainage pump set are both controlled by hydraulic pressure, so that the operation is safe and reliable without being restricted by the drainage environment, the efficiency of drainage operation is improved, the intensity of drainage operation is reduced, the flow of drainage operation is concise, and the intelligent regulation of the drainage flow is realized by arranging the PLC control unit 1.

Example 2

The hydraulic control module is optimized based on the above embodiment, as shown in fig. 1:

the hydraulic control unit comprises a drainage pump driving module, the drainage pump driving module comprises a hydraulic pump outlet valve group 3 and a control oil path 4, and the drainage pump group comprises two one-way variable hydraulic pumps 2;

the one-way variable hydraulic pump 2 is connected with the outlet valve group 3 of the hydraulic pump, the other side of the one-way variable hydraulic pump 2 is connected with the hydraulic oil tank, the control oil circuit 4 is used for adjusting the pressure parameter of the one-way variable hydraulic pump 2,

the drainage pump driving module is provided with a power takeoff, and the other end of the power takeoff is connected with an engine.

As an implementation mode, the hydraulic control unit comprises a trolley valve group 8, wherein the trolley valve group 8 is used for driving a trolley to move autonomously and enabling a drainage pump group to be in a drainage position;

the trolley is a crawler-type trolley and comprises a left-going motor 6 and a right-going motor 7, and the left-going motor 6 and the right-going motor 7 are both connected with a trolley valve group 8;

the trolley is provided with a horizontal pushing mechanism and a lifting mechanism, the horizontal pushing mechanism is used for moving the drainage pump set in the horizontal direction, and the lifting mechanism is used for driving the drainage pump set to overturn so that a water inlet of the drainage pump set is immersed into the water surface;

the horizontal pushing mechanism is provided with a horizontal pushing oil cylinder 9, the lifting mechanism is provided with a lifting oil cylinder 10, the horizontal pushing oil cylinder 9 and the lifting oil cylinder 10 are both connected with a trolley valve group 8, the trolley valve group 8 comprises a plurality of four-way electro-hydraulic servo valves, the four-way electro-hydraulic servo valves are respectively connected with an oil tank, a left-going motor 6, a right-going motor 7, the horizontal pushing oil cylinder 9 and the lifting oil cylinder 10, and the electrical control end of the four-way electro-hydraulic servo valves is connected with a PLC control unit 1.

In the present embodiment, the left-hand motor 6 and the right-hand motor 7 are both bidirectional motors.

As an implementation mode, the oil pipe winch is arranged inside the cart, and is used for extending the oil pipe and enabling the oil pipe to move along with the cart to supply oil for the cart and the drainage pump set, and the oil pipe winch comprises a bidirectional motor 11;

the hydraulic control unit comprises an oil pipe hinged disk valve group 12, the oil pipe hinged disk valve group 12 is connected with a two-way motor 11, the oil pipe hinged disk valve group 12 comprises four-way electro-hydraulic servo valves and reversing valves, the two-way motor 11 is connected with the four-way electro-hydraulic servo valves through the reversing valves to be connected into a hydraulic oil tank, and the electrical control ends of the four-way electro-hydraulic servo valves are connected with the PLC control unit 1.

As an implementation mode, the tail door is arranged at the tail part of the cart and is hinged with the cart, and a tail door oil cylinder 13 for driving the tail door to open and close is arranged on the tail door;

the cart is provided with a plurality of water hose winches for driving the water hoses to move along with the cart, and the water hose winches are provided with second bidirectional motors 14;

the side part of the cart is provided with a rolling door, the rolling door is provided with a hose winch landing mechanism for driving a hose winch and the water outlet end of the hose to move downwards, the hose winch landing mechanism comprises a landing oil cylinder 15,

the hydraulic control unit comprises a water hose winch reversing valve group 17, and the water hose winch reversing valve group 17 comprises a reversing valve and a four-way electro-hydraulic servo valve;

the tail gate oil cylinder 13 and the floor oil cylinder 15 are connected with a reversing valve and are connected with a four-way electro-hydraulic servo valve through a double-hydraulic control one-way valve, and a plurality of second bidirectional motors 14 are connected with the same reversing valve in parallel and are connected with the four-way electro-hydraulic servo valve through the reversing valve;

the tail gate oil cylinder 13, the landing oil cylinder 15 and the second bidirectional motor 14 are connected with a hydraulic oil tank through the four-way electro-hydraulic servo valve, and the electric control end of the four-way electro-hydraulic servo valve is connected with the PLC control unit 1.

In the embodiment, the plug of the four-way electro-hydraulic servo valve is an IP67 waterproof plug.

Example 3

The PLC control unit 1 and the detection unit are optimized based on the above embodiments, as shown in fig. 1-2:

the detecting element includes a plurality of pressure sensor 16, and is a plurality of pressure sensor locates hydraulic pump outlet valves 3 positions and hydraulic tank export position, and pressure sensor 16's output is connected with PLC control unit 1's simulation output.

As an implementation mode, the PLC control unit 1 includes a PLC controller, a frequency converter and an upper computer, the PLC controller is in communication connection with the engine control module through a CAN bus, a digital output end of the PLC controller is connected to the frequency converter, and the PLC controller is connected to the four-way electro-hydraulic servo valve of the trolley valve group 8, the oil pipe hinged disk valve group 12 and the water hose winch reversing valve group 17 through the frequency converter.

As an implementation mode, the upper computer comprises a PC, a key module and a remote control module, the PC is in communication connection with the PLC controller, and the PC is used for setting an internal program of the PLC controller;

PC machine communication connection button module, button module is used for transmitting external control instruction, button module includes MUC chip 18 and presses button group 19, MUC chip 18 is provided with communication module 20, communication module 20 is one or more combinations of USB serial ports, RS232 serial ports, WIFI module, bluetooth module, and MUC chip 18 passes through communication module 20 and PC machine communication connection, communication module 20's IO mouth is connected and is pressed button group 19.

As an implementation mode, the remote control module includes a touch screen industrial personal computer 21, the touch screen industrial personal computer 21 is in communication connection with the PC through one or more combinations of a WIFI module, a bluetooth module and a radio frequency module, and the remote control module is used for remotely sending an external control instruction to the PC.

The drainage operation is described with reference to the above embodiments:

firstly, parking a cart at a proper position near a waterlogging draining point, then turning on a power supply to enable a PLC control unit 1 to be in a power-on state, starting an engine, checking engine rotating speed parameters through an engine control module, enabling a four-way electro-hydraulic servo valve of a water hose winch reversing valve group 17 corresponding to a tail gate oil cylinder 13 to be powered on by the PLC control unit 1 according to a program instruction set by a PC (personal computer), enabling the tail gate oil cylinder 13 to act under the influence of hydraulic pressure, and pushing a tail gate to fall to form an acute angle with a cart body;

secondly, the PLC control unit 1 enables a trolley valve group 8 to be electrified corresponding to four-way electro-hydraulic servo valves of a left-going motor 6 and a right-going motor 7 according to a program instruction set by a PC, and the trolley starts to move;

meanwhile, the PLC control unit 1 enables a four-way electro-hydraulic servo valve of the oil pipe hinged disk valve group 12 to be electrified according to a program instruction set by the PC, so that the two-way motor 11 rotates under the influence of hydraulic pressure, at the moment, the oil pipe hinged disk works, and the oil pipe synchronously extends along with the movement of the trolley;

meanwhile, the PLC control unit 1 enables the water hose winch reversing valve group 17 to be connected with four electrified hydraulic servo valves on multiple paths of the second bidirectional motor 14 according to a program instruction set by a PC machine to enable the water hose winch reversing valve group to be electrified to work, at the moment, the water hose winch works, and a water hose moves along with the trolley to extend synchronously;

finally, the small car and the big car are separated to reach a drainage point.

In the second step, the staff sends an instruction to the PC through the key module or the remote control module, the PC sends the instruction to the PLC, the PLC executes the instruction and adjusts the four-way electro-hydraulic servo valve by using the frequency converter, so that the moving speed of the trolley is adjusted according to the pressure of the oil way, and the moving direction is changed by adjusting the differential speed of the left-hand motor 6 and the right-hand motor 7.

Correspondingly, the pressure sensor 16 detects the oil circuit pressure in real time and feeds back the oil circuit pressure to the PLC controller, and the PLC controller adopts a PID control mode to enable the rotating speeds of the second bidirectional motor 14, the bidirectional motor 11, the left-going motor 6 and the right-going motor 7 to be matched with each other.

Thirdly, the PLC control unit 1 enables the trolley valve group 8 to work corresponding to four-way electro-hydraulic servo valves of the horizontal pushing oil cylinder 9 and the lifting oil cylinder 10 according to a program instruction set by the PC, the horizontal pushing oil cylinder 9 acts to push the drainage pump group to the limit position of the horizontal pushing oil cylinder 9, then the lifting oil cylinder 10 works to turn over the drainage pump group by a certain angle alpha, the angle alpha ranges from 30 degrees to 45 degrees, and at the moment, a water outlet of the drainage pump group is positioned underwater;

then, the PLC control unit 1 enables the water hose winch reversing valve group 17 to work corresponding to the four-way electro-hydraulic servo valve of the floor oil cylinder 15 according to the setting program instruction of the PC, and the floor oil cylinder 15 works to set the other end of the water hose on the ground.

Fourthly, the PLC control unit 1 enables the hydraulic pump outlet valve group 3 to work according to the program instruction set by the PC, at the moment, the engine provides a power takeoff to provide kinetic energy for the drainage pump group, and the one-way variable hydraulic pump 2 starts drainage operation;

during the period, the PC is communicated with the engine control module through the key module or the remote control module, the engine control module is used for adjusting the rotating speed of the engine and adjusting the drainage power of the one-way variable hydraulic pump 2 through the control oil circuit 4.

After the drainage task is completed, the trolley and the drainage pump set are reset by reversely operating the steps, and drainage operation is completed.

The above-described embodiments are merely preferred embodiments of the present invention, and not intended to limit the scope of the invention, so that equivalent changes or modifications in the structure, features and principles described in the present invention should be included in the claims of the present invention.