Electric control device of haulage vehicle and haulage vehicle

Abstract

The present invention discloses an electric control device of a hauling vehicle and a hauling vehicle. A leakage detection module is provided to detect the insulation resistance value of the power supply circuit of the oil pump motor before the oil pump motor of the hauling vehicle is started. When the control module receives a start command and the insulation resistance value is greater than a preset insulation resistance value, the control power supply is controlled to supply power to the oil pump motor to start the oil pump motor and the leakage detection module is controlled to stop working, so as to avoid introducing the power supply current of the oil pump motor into the leakage detection module and causing damage to the leakage detection module. The temperature acquisition module and the current acquisition module are respectively used to detect the temperature and power supply current of the oil pump motor of the hauling vehicle, and when the temperature exceeds the preset temperature or the power supply current is not within the preset current range, the control power supply is controlled to stop supplying power to the oil pump motor to stop the oil pump motor and the leakage detection module is controlled to start working, thereby ensuring the safety and stability of the oil pump motor before and after starting, and protecting the safety of underground workers.

Description

Technical Field

[0001] The invention relates to the field of hauling equipment, and in particular to an electric control device of a hauling vehicle and the hauling vehicle. Background Art

[0002] When the coal mine working face is transferred, the hydraulic support needs to be transferred. With the increase of coal production, the hydraulic support used in the fully mechanized mining working face is developing towards large-scale development and increasing in weight. The existing support removal equipment has low working efficiency and requires multiple hauling. As a new type of support hauling equipment, the hauling vehicle can realize the one-time hauling of the hydraulic support, but the stability and safety of the work cannot be guaranteed. Summary of the invention

[0003] The purpose of the present invention is to provide an electric control device of a haulage vehicle and the haulage vehicle, which ensures the safety and stability of the operation of the oil pump motor before and after starting, and protects the safety of underground workers.

[0004] In order to solve the above technical problems, the present invention provides an electric control device for a haulage vehicle, the haulage vehicle includes an oil pump motor, and the electric control device includes:

[0005] A current acquisition module, used for acquiring the power supply current of the oil pump motor;

[0006] A temperature acquisition module, used to acquire the temperature of the oil pump motor;

[0007] A leakage detection module, used for detecting the insulation resistance value of the power supply circuit of the oil pump motor when the oil pump motor is powered off, and stopping detecting the insulation resistance value of the power supply circuit of the oil pump motor when the oil pump motor is started;

[0008] The control module is used to control the power supply to supply power to the oil pump motor to start the oil pump motor and control the leakage detection module to stop working when a start command is received and the insulation resistance value is greater than a preset insulation resistance value; and control the power supply to stop supplying power to the oil pump motor to stop the oil pump motor and control the leakage detection module to start working when a stop command is received or the temperature exceeds a preset temperature or the supply current is not within a preset current range.

[0009] Preferably, it also includes a transformer;

[0010] The primary winding of the transformer is connected to the power supply, and the secondary winding of the transformer is connected to the power supply end of the leakage detection module, so as to supply power to the leakage detection module after reducing and converting the alternating current output by the power supply.

[0011] Preferably, it also includes:

[0012] A switching power supply, wherein the input end of the switching power supply is connected to the secondary winding, and the output end is respectively connected to the control module and the temperature acquisition module, and is used to rectify the alternating current output by the transformer and then supply power to the control module and the temperature acquisition module.

[0013] Preferably, it also includes a voltage detection module;

[0014] The voltage detection module is used to detect the output voltage of the secondary winding;

[0015] The control module is also used to determine the output voltage of the power supply based on the output voltage of the secondary winding and the turns ratio of the primary and secondary windings of the transformer. When it is determined that the output voltage of the power supply is not within a preset voltage range, the control module controls the power supply to stop supplying power to the oil pump motor to shut down the oil pump motor and controls the leakage detection module to start working.

[0016] Preferably, the control module includes a processing module, a first relay, a second relay and a contactor;

[0017] A first end of the coil of the first relay is connected to the output end of the processing module, and a second end is connected to the positive electrode of the switching power supply;

[0018] A first end of the normally open contact of the first relay is connected to a first end of the secondary winding, and a second end is connected to a first end of the coil of the second relay;

[0019] A second end of the coil of the second relay is connected to a second end of the secondary winding;

[0020] A first end of the normally open contact of the second relay is connected to a first end of the coil of the contactor, and a second end is connected to a second end of the secondary winding;

[0021] The second end of the coil of the contactor is connected to the first end of the secondary winding;

[0022] The first end of the normally open contact of the contactor is connected to the power supply, and the second end is connected to the oil pump motor;

[0023] The processing module is used to control the leakage detection module to stop working and control the coil of the first relay to be energized when receiving the start instruction, so that the power supply supplies power to the oil pump motor to start the oil pump motor; when receiving the stop instruction or when the temperature exceeds the preset temperature or when the operating current is not within the preset current range, control the leakage detection module to start working and control the coil of the first relay to be de-energized, so that the power supply stops supplying power to the oil pump motor to stop the oil pump motor.

[0024] Preferably, the second relay and the contactor both further include normally closed contacts;

[0025] A first end of the normally closed contact of the second relay is connected to a first end of the normally closed contact of the contactor, and a second end is connected to a detection end of the leakage detection module;

[0026] The second end of the normally closed contact of the contactor is connected to the power supply line between the normally open contact of the contactor and the oil pump motor;

[0027] The normally closed contacts of the second relay and the normally closed contacts of the contactor are both used to close when the coil of the first relay is powered off so that the leakage detection module starts working, and to open when the coil of the first relay is powered on so that the leakage detection module stops working.

[0028] Preferably, it also includes:

[0029] A remote control receiver is used to send the start command or the stop command to the control module when receiving the start command or the stop command sent by the remote control, and to control the solenoid valve of the trolley according to the control command when receiving the control command sent by the remote control, so as to control the movement of the trolley or the rocker arm action of the trolley through the solenoid valve when the oil pump motor is started.

[0030] Preferably, it further comprises a third relay;

[0031] The first end of the normally open contact of the third relay is connected to the power supply end of the remote control module, and the second end is connected to the switch power supply; the first end of the coil of the third relay is connected to the control module, and the second end is connected to the switch power supply;

[0032] The switching power supply is also used to supply power to the remote control receiver;

[0033] The control module is also used to control the coil of the third relay to be energized when receiving a remote control mode command so that the remote control receiver is powered on; and to control the coil of the third relay to be de-energized when receiving a local mode command so that the remote control receiver is powered off.

[0034] Preferably, it also includes a methane power-off module connected to the control module;

[0035] The methane power-off module is used to detect the methane concentration in the environment around the haulage vehicle, and when the methane concentration exceeds a preset concentration, sends a methane exceeding standard signal to the control module;

[0036] The control module is also used to control the oil pump motor to cut off power when receiving the methane exceeding standard signal.

[0037] Preferably, it also includes an infrared sensing module connected to the control module;

[0038] The infrared sensing module is used to send a danger signal to the control module when an obstacle is detected within a preset range around the hauling vehicle;

[0039] The control module is also used to control the oil pump motor to cut off power when receiving the danger signal.

[0040] Preferably, it further comprises an alarm module connected to the control module, wherein the alarm module is used to alarm when receiving an alarm signal;

[0041] The control module is further configured to send the alarm signal to the alarm module when an alarm instruction is received, when the oil pump motor is started, when the temperature exceeds a preset temperature, or when the operating current is not within the preset current range.

[0042] The present invention also provides a haulage vehicle, comprising the oil pump motor and the electric control device of the haulage vehicle as described above.

[0043] The present invention provides an electric control device and a haulage vehicle. A leakage detection module is provided to detect the insulation resistance value of the power supply circuit of the oil pump motor before the oil pump motor of the haulage vehicle is started. When the control module receives a start command and the insulation resistance value is greater than a preset insulation resistance value, the control power supply is controlled to supply power to the oil pump motor to start the oil pump motor and the leakage detection module is controlled to stop working, so as to avoid introducing the power supply current of the oil pump motor into the leakage detection module and causing damage to the leakage detection module. The temperature acquisition module and the current acquisition module are respectively used to detect the temperature and power supply current of the oil pump motor of the haulage vehicle, and when the temperature exceeds the preset temperature or the power supply current is not within the preset current range, the control power supply stops supplying power to the oil pump motor to stop the oil pump motor and the leakage detection module is controlled to start working, thereby ensuring the safety and stability of the oil pump motor before and after starting, and protecting the safety of underground workers. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the prior art and the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0045] Figure 1 A schematic structural diagram of an electric control device for a haulage vehicle provided by the present invention;

[0046] Figure 2A partial structural schematic diagram of another electric control device of a haulage vehicle provided by the present invention;

[0047] Figure 3 A schematic diagram of the structure of a processor and a communication module in another electronic control device of a haulage vehicle provided by the present invention;

[0048] Figure 4 A schematic diagram of the structure of an A / D conversion module in another electric control device of a haulage vehicle provided by the present invention;

[0049] Figure 5 A partial structural schematic diagram of another electric control device of a haulage vehicle provided by the present invention;

[0050] Figure 6 A partial structural schematic diagram of another electric control device of a haulage vehicle provided by the present invention;

[0051] Figure 7 A partial structural schematic diagram of another electric control device of a haulage vehicle provided by the present invention;

[0052] Figure 8 A partial structural schematic diagram of another electric control device of a haulage vehicle provided by the present invention;

[0053] Fig. 9 A structural schematic diagram of a methane power-off module in an electric control device of a haulage vehicle provided by the present invention;

[0054] Fig.10 A schematic diagram of the structure of an infrared sensing module in an electric control device of a haulage vehicle provided by the present invention;

[0055] Fig.11 A partial structural schematic diagram of another electric control device of a haulage vehicle provided by the present invention;

[0056] Fig.12 A partial structural schematic diagram of another electric control device of a haulage vehicle provided by the present invention;

[0057] Fig.13 A partial structural schematic diagram of another electric control device of a haulage vehicle provided by the present invention;

[0058] Fig.14 A partial structural schematic diagram of another electric control device of a haulage vehicle provided by the present invention. DETAILED DESCRIPTION

[0059] The core of the present invention is to provide an electric control device of a haulage vehicle and the haulage vehicle, which ensures the safety and stability of the oil pump motor before and after starting, and protects the safety of underground workers.

[0060] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0061] Please refer to Figure 1 , Figure 1 A schematic structural diagram of an electric control device for a haulage vehicle provided by the present invention.

[0062] The haulage vehicle includes an oil pump motor M1, and the electronic control device includes:

[0063] The current acquisition module H1 is used to acquire the power supply current of the oil pump motor M1;

[0064] Considering that when the oil pump motor M1 is overloaded, on the one hand, the oil pump motor M1 may be damaged, and on the other hand, there is a risk of causing a fire, which may cause an explosion of gas and coal dust in a coal mine. Therefore, in this embodiment, a current acquisition module H1 is provided to provide a basis for shutting down the oil pump motor M1 when the power supply current of the oil pump motor M1 is out of phase or the oil pump motor M1 is overloaded.

[0065] The temperature acquisition module RT1 is used to collect the temperature of the oil pump motor M1;

[0066] Considering that the oil pump motor M1 may be damaged due to excessive temperature when it runs for a long time, in order to protect the oil pump motor M1, in this embodiment, a temperature acquisition module RT1 is provided to detect the temperature of the oil pump motor M1, so as to provide a protection basis when the temperature of the oil pump motor M1 is too high.

[0067] The leakage detection module LD1 is used to detect the insulation resistance value of the power supply line of the oil pump motor M1 when the oil pump motor M1 is powered off, and stop detecting the insulation resistance value of the power supply line of the oil pump motor M1 when the oil pump motor M1 is started;

[0068] Considering that if a leakage fault occurs in a coal mine, it may cause an explosion of gas and coal dust, may ignite the detonator in advance, and may burn the oil pump motor M1, posing a threat to personal safety and property safety. In order to solve the above problems, in this embodiment, a leakage detection module LD1 is provided to detect the insulation resistance value of the power supply line of the oil pump motor M1 before the oil pump motor M1 is started, so as to provide a basis for leakage protection.

[0069] Specifically, the leakage detection module LD1 detects the insulation resistance value of the power supply circuit of the oil pump motor M1 when the oil pump motor M1 is not started. When the insulation resistance value is greater than a preset insulation resistance value, for example, greater than 40 kilo-ohms, it indicates that there is no risk of leakage. When the insulation resistance value is less than a preset insulation resistance value, for example, less than 40 kilo-ohms, it indicates that there is a risk of leakage. The leakage detection module LD1 sends a leakage prompt signal to the control module 1, such as a DC24V level signal, so that the control module 1 performs leakage protection on the oil pump motor M1.

[0070] Since the voltage on the power supply line of the oil pump motor M1 is usually large, in order to avoid introducing the power supply voltage of the oil pump motor M1 into the leakage detection module LD1, in this embodiment, the leakage detection module LD1 stops detecting the insulation resistance value of the power supply line of the oil pump motor M1 when the oil pump motor M1 is started, thereby protecting the leakage detection module LD1 from being burned.

[0071] The control module 1 is used to control the power supply to supply power to the oil pump motor M1 so that the oil pump motor M1 starts and the leakage detection module LD1 stops working when a start command is received and the insulation resistance value is greater than a preset insulation resistance value; when a stop command is received or the temperature exceeds a preset temperature or the supply current is not within a preset current range, the control power supply stops supplying power to the oil pump motor M1 so that the oil pump motor M1 stops and the leakage detection module LD1 starts working.

[0072] In order to control the oil pump motor M1 and provide protection when the power supply current of the oil pump motor M1 is abnormal, the temperature of the oil pump motor M1 is too high, and the insulation resistance value of the power supply circuit of the oil pump motor M1 is too low, in this embodiment, a control module 1 is provided.

[0073] When the control module 1 receives a start command and the insulation resistance value is greater than the preset insulation resistance value, for example, greater than 40 kilo-ohms, it indicates that there is no risk of leakage in the power supply circuit of the oil pump motor M1, and the oil pump motor M1 is allowed to start. The control module 1 controls the power supply to supply power to the oil pump motor M1 to start the oil pump motor M1, and the control module 1 controls the leakage detection module LD1 to stop working to avoid the power supply current of the oil pump motor M1 from being introduced into the leakage detection module LD1. If the control module 1 receives a start command but the insulation resistance value is less than the preset insulation resistance value, for example, less than 40 kilo-ohms, it indicates that there is a risk of leakage in the power supply circuit of the oil pump motor M1, and a leakage accident will occur when starting the oil pump motor M1. Therefore, the control module 1 will not control the power supply to supply power to the oil pump motor M1 to avoid the occurrence of leakage accidents. For example, please refer to Figure 2 and Figure 3 , Figure 2 A partial structural schematic diagram of another electric control device for a haulage vehicle provided by the present invention, Figure 3A schematic diagram of the structure of a processor and a communication module in another electronic control device of a hauling vehicle provided by the present invention. When the preset insulation resistance value is 40 kilo-ohms, if the insulation resistance value detected by the leakage detection module LD1 is less than 40 kilo-ohms, the normally open contact of the leakage detection module LD1 is closed, and the control module 1 will not control the power supply to the oil pump motor M1 after receiving a 24V level signal through X9.

[0074] When the control module 1 receives a stop command, or the temperature exceeds a preset temperature, for example, exceeds 170 degrees Celsius, or the power supply current of the oil pump motor M1 is not within a preset current range, the control power supply stops supplying power to the oil pump motor M1 to shut down the oil pump motor M1, and controls the leakage detection module LD1 to start working.

[0075] In addition, the current acquisition module H1 here can be but is not limited to a current transformer. After the control module 1 obtains the power supply current of the oil pump motor M1 collected by the current transformer, in addition to judging whether the power supply current of the oil pump motor M1 is within a preset current range based on the working current, it can also judge whether there is a phase loss in the power supply current of the oil pump motor M1, and when there is a phase loss in the power supply current of the oil pump motor M1, the control power supply stops supplying power to the oil pump motor M1.

[0076] It should also be noted that the temperature acquisition module RT1 here can be but is not limited to a thermistor with a negative temperature coefficient.

[0077] In summary, in this embodiment, the leakage detection module LD1 is set to detect the insulation resistance value of the power supply line of the oil pump motor M1 before the oil pump motor M1 of the hauling vehicle is started. The temperature acquisition module RT1 and the current acquisition module H1 are respectively used to detect the temperature and power supply current of the oil pump motor M1 of the hauling vehicle, and when the temperature exceeds the preset temperature or the power supply current is not within the preset current range, the power supply is controlled to stop supplying power to the oil pump motor M1 to shut down the oil pump motor M1 and control the leakage detection module LD1 to start working, thereby ensuring the safety and stability of the oil pump motor M1 before and after starting, and protecting the safety of underground workers.

[0078] Based on the above embodiments: Please refer to Figure 2 , Figure 3 and Figure 4 , Figure 3 A schematic diagram of the structure of a processor and a communication module in another electronic control device of a haulage vehicle provided by the present invention, Figure 4This is a structural schematic diagram of an A / D conversion module in another electric control device of a hauling vehicle provided by the present invention. The first end of the secondary winding of the transformer 21 is 100, and the second end is 102. The secondary winding of the transformer 21 supplies power to the leakage detection module LD1, X1 to X10 are input ends of the processor in the processing module, Y0 to Y2 are output ends of the processor, and H11, H12, H13 and DY are input ends of the A / D conversion module in the processing module.

[0079] As a preferred embodiment, it further includes a transformer 21;

[0080] The primary winding of the transformer 21 is connected to the power supply, and the secondary winding of the transformer 21 is connected to the power supply end of the leakage detection module LD1, so as to supply power to the leakage detection module LD1 after reducing and converting the AC power output by the power supply.

[0081] Considering that the output voltage of the power supply of the oil pump motor M1 is too large to directly power the leakage detection module LD1, and setting a power supply for the leakage detection module LD1 alone will increase the cost, in this embodiment, a transformer 21 is provided to power the leakage detection module LD1 by stepping down the output voltage of the power supply, thereby improving the utilization efficiency of the power supply and eliminating the need to set up multiple power supplies.

[0082] It should also be noted that a fuse can be set between the primary winding of the transformer 21 and the power supply to improve safety. In order to protect the leakage detection module LD1, a first air switch QF1 can also be set between the leakage detection module LD1 and the secondary winding of the transformer 21. This embodiment is not particularly limited here.

[0083] As a preferred embodiment, it also includes:

[0084] Please refer to Figure 5 , Figure 5 A partial structural schematic diagram of another electric control device of a haulage vehicle provided by the present invention.

[0085] The switching power supply 71 has an input end connected to the secondary winding, and an output end connected to the control module 1 and the temperature acquisition module RT1 respectively, and is used to rectify the AC power output by the transformer 21 and then supply power to the control module 1 and the temperature acquisition module RT1.

[0086] Considering that the current required for the control module 1 and the temperature acquisition module RT1 to work is usually direct current, in this embodiment, a switching power supply 71 is also provided, which can rectify the alternating current output by the transformer 21 to power the control module 1 and the temperature acquisition module RT1. There is no need to separately provide a direct current power supply for the control module 1 and the temperature acquisition module RT1, thereby reducing costs.

[0087] As a preferred embodiment, it also includes a voltage detection module;

[0088] The voltage detection module is used to detect the output voltage of the secondary winding;

[0089] The control module 1 is also used to determine the output voltage of the power supply according to the output voltage of the secondary winding and the turns ratio of the primary and secondary windings of the transformer 21. When it is determined that the output voltage of the power supply is not within a preset voltage range, the control power supply stops supplying power to the oil pump motor M1 to shut down the oil pump motor M1 and controls the leakage detection module LD1 to start working.

[0090] In order to prevent the oil pump motor M1 from malfunctioning due to over-voltage or under-voltage during operation due to unstable output voltage of the power supply, it is necessary to detect the output voltage of the power supply. Considering that the output voltage of the power supply of the oil pump motor M1 is very large and difficult to measure directly, in order to solve the above problem, in this embodiment, a voltage detection module is provided, and the voltage detection module is used to detect the output voltage of the secondary winding of the transformer 21. The control module 1 determines the output voltage of the power supply according to the detected output voltage of the secondary winding of the transformer 21 and the turns ratio of the original secondary winding. For example, assuming that the output voltage of the secondary winding of the transformer 21 is 220V and the turns ratio of the original secondary winding of the transformer 21 is 5, the output voltage of the power supply is 220V*5=1100V. And determine whether the output voltage of the power supply is within a preset voltage range. The preset voltage range is related to the rated voltage of the oil pump motor M1 of the hauling vehicle. If it is within the preset voltage range, it means that the output voltage of the power supply is normal and the input voltage of the oil pump motor M1 is the rated voltage. If it is not within the preset voltage range, it means that the output voltage of the power supply is abnormal and the input voltage of the oil pump motor M1 is not the rated voltage. If the power supply continues to output voltage to the oil pump motor M1, it may cause a fault. Therefore, the control module 1 controls the power supply to stop supplying power to the oil pump motor M1 to shut down the oil pump motor M1 and controls the leakage detection module LD1 to start working.

[0091] The voltage detection module here can be, but is not limited to, a voltage transmitter 72 .

[0092] In summary, in this embodiment, the control module 1 determines the output voltage of the power supply by detecting the output voltage of the secondary winding of the transformer 21 and the turns ratio of the primary to secondary winding of the transformer 21 through the voltage detection module, and controls the power supply to stop supplying power to the oil pump motor M1 when the output voltage of the power supply is not within a preset voltage range, thereby realizing the detection of the output voltage of the power supply and providing over-voltage and under-voltage protection for the oil pump motor M1 when the output voltage of the power supply is abnormal.

[0093] Please refer to Figure 6 and Figure 7 , Figure 6 A partial structural schematic diagram of another electric control device for a haulage vehicle provided by the present invention, Figure 7A partial structural diagram of another electric control device for a hauling vehicle provided by the present invention. The first end of the coil of the first relay J0 is connected to the Y0 output end of the processor in the processing module; the second end of the normally open contact of the first relay J0 is connected to the first end of the coil of the second relay KA1 through the Y01 port; the first end of the normally open contact KA1.1 of the second relay KA1 is connected to the first end of the coil KM1.3 of the contactor through the 61 port, the first end of the normally closed contact KA1.2 of the second relay KA1 is connected to the first end of the normally closed contact KM1.2 of the contactor through the 30 port, and the second end is connected to the detection end of the leakage detection module LD1 through the 80 port.

[0094] As a preferred embodiment, the control module 1 includes a processing module, a first relay J0, a second relay KA1 and a contactor;

[0095] A first end of the coil of the first relay J0 is connected to the output end of the processing module, and a second end is connected to the positive electrode of the switching power supply 71;

[0096] A first end of a normally open contact of the first relay J0 is connected to a first end of the secondary winding, and a second end is connected to a first end of a coil of the second relay KA1;

[0097] A second end of the coil of the second relay KA1 is connected to a second end of the secondary winding;

[0098] A first end of a normally open contact KA1.1 of the second relay KA1 is connected to a first end of a coil KM1.3 of the contactor, and a second end is connected to a second end of the secondary winding;

[0099] The second end of the coil KM1.3 of the contactor is connected to the first end of the secondary winding;

[0100] The first end of the normally open contact KM1.1 of the contactor is connected to the power supply, and the second end is connected to the oil pump motor M1;

[0101] The processing module is used to control the leakage detection module LD1 to stop working and control the coil of the first relay J0 to be energized when receiving a start command, so that the power supply supplies power to the oil pump motor M1 to start the oil pump motor M1; when receiving a stop command or when the temperature exceeds a preset temperature or when the operating current is not within a preset current range, control the leakage detection module LD1 to start working and control the coil of the first relay J0 to be de-energized, so that the power supply stops supplying power to the oil pump motor M1 to shut down the oil pump motor M1.

[0102] Considering that the voltage of the power supply circuit of the oil pump motor M1 is usually thousands of volts, while the output voltage of the processing module is only tens of volts, it is difficult to directly control the on and off of the power supply circuit of the oil pump motor M1. Therefore, in this embodiment, the control module 1 includes: a processing module, a first relay J0, a second relay KA1 and a contactor. When the processing module receives a start instruction, the processing module controls the coil of the first relay J0 to be energized, so that the normally open contact of the first relay J0 is closed. After the coil of the second relay KA1 is energized, the normally open contact KA1.1 of the second relay KA1 is controlled to be closed, so that the coil KM1.3 of the contactor is energized, and the coil KM1.3 of the contactor controls the normally open contact KM1.1 of the contactor set between the power supply and the oil pump motor M1 to be closed, so that the power supply supplies power to the oil pump motor M1. Similarly, when the processing module receives a stop instruction or when the temperature exceeds the preset temperature or the working current is not within the preset current range, the processing module controls the coil of the first relay J0 to be de-energized, so that the power supply stops supplying power to the oil pump motor M1.

[0103] The contactor here can be but is not limited to a vacuum contactor. In addition, in order to ensure the safety of maintenance personnel, an isolating switch 22 can also be set between the power supply and the electronic control device of the above-mentioned hauling vehicle. Considering that when the oil pump motor M1 is started, that is, when the vacuum contactor is closed, if the isolating switch 22 is directly disconnected, the oil pump motor M1 may be burned. Therefore, the auxiliary contacts of the isolating switch 22 are also connected to the control module 1, so that when the isolating switch 22 is disconnected, the control module 1 receives the disconnection signal of the isolating switch 22 and controls the vacuum contactor to disconnect, ensuring that the vacuum contactor is disconnected when the isolating switch 22 is disconnected. In order to suppress the operating overvoltage generated when the vacuum contactor is disconnected, an RC resistor-capacitor absorber RC1 can also be set between the vacuum contactor and the oil pump motor M1 to absorb the operating overvoltage generated when the vacuum contactor is disconnected.

[0104] It should be noted that, considering that the current acquisition module H1 and the voltage acquisition module acquire analog quantities, the processing module may include but is not limited to a processor and an A / D conversion module, and the A / D conversion module is used to convert analog quantities into digital quantities.

[0105] In summary, in this embodiment, the processing module controls the oil pump motor M1 by providing the first relay J0, the second relay KA1 and the contactor, and the structure is simple.

[0106] As a preferred embodiment, the second relay KA1 and the contactor both further include normally closed contacts;

[0107] A first end of the normally closed contact KA1.2 of the second relay KA1 is connected to a first end of the normally closed contact KM1.2 of the contactor, and a second end is connected to a detection end of the leakage detection module LD1;

[0108] The second end of the normally closed contact KM1.2 of the contactor is connected to the power supply line between the normally open contact KM1.1 of the contactor and the oil pump motor M1;

[0109] The normally closed contact KA1.2 of the second relay KA1 and the normally closed contact KM1.2 of the contactor are both used to close when the coil of the first relay J0 is de-energized so that the leakage detection module LD1 starts working, and to open when the coil of the first relay J0 is energized so that the leakage detection module LD1 stops working.

[0110] Considering that when the oil pump motor M1 is started, the leakage detection module LD1 must be controlled to stop working, otherwise the high voltage of the power supply will be introduced into the leakage detection module LD1, which is very dangerous in the environment of a large number of flammable materials in the coal mine. In order to solve the above problem, in this embodiment, the second relay KA1 and the contactor also include normally closed contacts, and the normally closed contact KA1.2 of the second relay KA1 and the normally closed contact KM1.2 of the contactor are arranged between the power supply line of the leakage detection module LD1 and the oil pump motor M1, so as to ensure that the leakage detection module LD1 stops working when the oil pump motor M1 is started.

[0111] Specifically, when the processing module receives a start instruction, the processing module controls the coil of the first relay J0 to be energized, so that the normally open contact of the first relay J0 is closed, and then the coil of the second relay KA1 is energized, and the coil of the second relay KA1 controls the normally closed contact KA1.2 of the second relay KA1 to be disconnected, and the normally open contact KA1.1 of the second relay KA1 is closed, and the coil KM1.3 of the contactor is energized, and the normally closed contact KM1.2 of the contactor is controlled to be disconnected, so that the leakage detection module LD1 stops working. Similarly, when the processing module receives a stop instruction or when the temperature exceeds the preset temperature or the operating current is not within the preset current range, the processing module controls the coil of the first relay J0 to be de-energized, and the normally closed contact KA1.2 of the second relay KA1 and the normally closed contact KM1.2 of the contactor are both closed, and the leakage detection module LD1 starts to detect the insulation resistance value of the power supply line of the oil pump motor M1.

[0112] To sum up, in this embodiment, by controlling the closing of the normally closed contact KA1.2 of the second relay KA1 and the normally closed contact KM1.2 of the contactor when the oil pump motor M1 is not started, the function of measuring the insulation resistance value of the power supply circuit of the oil pump motor M1 when the oil pump motor M1 is not started is realized, and the structure is simple. When the oil pump motor M1 is started, the normally closed contact KA1.2 of the second relay KA1 and the normally closed contact KM1.2 of the contactor are controlled to be disconnected, thereby avoiding the introduction of the power supply of the oil pump motor M1 into the leakage detection module LD1, and it is safer than setting only one normally closed contact.

[0113] Please refer to Figure 8 , Figure 8 A partial structural schematic diagram of another electric control device of a haulage vehicle provided by the present invention.

[0114] As a preferred embodiment, it also includes:

[0115] The remote control receiver 1001 is used to send a start command or a stop command to the control module 1 when receiving a start command or a stop command sent by the remote control. When receiving a control command sent by the remote control, the solenoid valve of the trolley is controlled according to the control command, so that when the oil pump motor M1 is started, the solenoid valve is used to control the movement of the trolley or the rocker action of the trolley.

[0116] Considering that the environment in the coal mine is relatively complex, it is difficult for the driver to control the hauling vehicle from the driver's position when the driver's position is dangerous or the driver's line of sight is poor. Therefore, in this embodiment, a remote control receiver 1001 is provided to realize remote control of the hauling vehicle.

[0117] Specifically, after receiving the start command sent by the remote controller, the remote control receiver 1001 sends the start command to the control module 1. When the control module 1 receives the start command and the insulation resistance value is greater than the preset insulation resistance value, the control power supply supplies power to the oil pump motor M1 to start the oil pump motor M1 and controls the leakage detection module LD1 to stop working. The oil pump motor M1 provides power for the hydraulic system of the tractor. When the remote control receiver 1001 receives the control command sent by the remote controller, the remote control receiver 1001 controls the solenoid valve in the hydraulic system of the tractor according to the control command to control the movement of the tractor or the rocker action of the tractor. For example, the direction of movement of the tractor is controlled by controlling the opening direction of the solenoid valve in the hydraulic system of the tractor, and the speed of movement of the tractor is controlled by controlling the opening size of the solenoid valve in the hydraulic system of the tractor. After receiving the stop command sent by the remote controller, the remote control receiver 1001 sends the stop command to the control module 1. After receiving the stop command, the control module 1 controls the power supply to stop supplying power to the oil pump motor M1 to stop the oil pump motor M1 and controls the leakage detection module LD1 to start working.

[0118] It should be noted that the remote control receiver 1001 herein may be, but is not limited to, a flameproof remote control receiver 1001, and the remote control receiver 1001 and the control module 1 may communicate with each other via, but is not limited to, RS (Recommended Standard) 485. When the remote control receiver 1001 and the control module 1 communicate via RS485, the control module 1 also includes a communication module. The remote control receiver 1001 may control the solenoid valve in the hydraulic system via PWM (Pulse width modulation), or may directly control the solenoid valve via a switch quantity, which is not particularly limited in this embodiment.

[0119] To summarize, in this embodiment, the remote control receiver 1001 is used to control the solenoid valve in the hydraulic system to control the movement of the trolley or the rocker arm movement of the trolley, and the remote control receiver 1001 is used to send start instructions and stop instructions to the control module 1, thereby realizing remote control of the trolley when the driver's position is dangerous or the driver's line of sight is poor, thereby ensuring the driver's safety.

[0120] As a preferred embodiment, it further includes a third relay J2;

[0121] A first end of the normally open contact of the third relay J2 is connected to the power supply end of the remote control receiver 1001, and a second end is connected to the switch power supply 71; a first end of the coil of the third relay J2 is connected to the control module 1, and a second end is connected to the switch power supply 71;

[0122] The switching power supply 71 is also used to supply power to the remote control receiver 1001;

[0123] The control module 1 is also used to control the coil of the third relay J2 to be energized when receiving a remote control mode command so that the remote control receiver 1001 is powered on; and to control the coil of the third relay J2 to be de-energized when receiving a local mode command so that the remote control receiver 1001 is powered off.

[0124] In order to avoid the trolley being miscontrolled in the local mode, that is, when the driver is operating the trolley at the driver's seat, due to the remote control not being turned off, in this embodiment, the switching power supply 71 supplies power to the remote control receiver 1001, and a third relay J2 is provided between the remote control receiver 1001 and the switching power supply 71 to ensure that in the local mode, relevant instructions cannot be sent to the remote control receiver 1001 by the remote control to control the trolley.

[0125] Specifically, when the control module 1 receives a remote control mode instruction, the remote control mode instruction is used to switch the trolley to the remote control mode, that is, the relevant instructions are sent to the remote control receiver 1001 through the remote control to control the trolley, the control module 1 controls the coil of the third relay J2 to be energized, the normally open contact of the third relay J2 is closed, and the switching power supply 71 starts to supply power to the remote control receiver 1001. When the local mode instruction is received, the local mode instruction is used to switch the trolley to the local mode, the control module 1 controls the coil of the third relay J2 to be de-energized, the normally open contact of the third relay J2 is disconnected, and the switching power supply 71 stops supplying power to the remote control receiver 1001. At this time, the trolley cannot be controlled by the remote control.

[0126] In summary, by controlling the third relay J2 arranged between the remote control receiver 1001 and the switching power supply 71, it is achieved that in the remote control mode, the remote control can send relevant instructions to the remote control receiver 1001 to control the trolley, while ensuring that in the local mode, the remote control cannot send relevant instructions to the remote control receiver 1001 to control the trolley, thereby further ensuring the safety of the driver.

[0127] As a preferred embodiment, it also includes a methane power-off module 1201 connected to the control module 1;

[0128] The methane power-off module 1201 is used to detect the methane concentration in the environment around the haulage vehicle, and when the methane concentration exceeds a preset concentration, a methane exceeding standard signal is sent to the control module 1;

[0129] The control module 1 is also used to control the oil pump motor M1 to cut off power when receiving a methane exceeding standard signal.

[0130] Considering that the air in the coal mine contains methane gas, when the concentration of methane gas in the air is too high, starting the oil pump motor M1 may cause an explosion. In this embodiment, a methane power-off module 1201 is provided to detect the methane concentration in the environment around the haulage vehicle. When the methane concentration exceeds the preset concentration, it indicates that the methane concentration in the environment is too high, and starting the oil pump motor M1 may cause an explosion. The methane power-off module 1201 sends a methane excess signal to the control module 1. When the control module 1 receives the methane excess signal, it controls the oil pump motor M1 to be powered off. For example, please refer to Fig. 9 , Fig. 9The present invention provides a schematic diagram of the structure of a methane power-off module of an electric control device for a hauling vehicle. The power supply of the methane power-off module 1201 is provided by the other secondary windings 101 and 102 of the transformer 21. One end of the normally open contact of the methane power-off module 1201 is connected to the control module 1, and the other end is connected to the 24V level signal switch power supply 71. When the methane concentration exceeds the preset concentration, the normally open contact of the methane power-off module 1201 is closed. After the X6 input end of the control module 1 receives the 24V level signal, the power supply of the oil pump motor M1 is controlled to stop supplying power to the oil pump motor M1 so that the oil pump motor M1 stops. In addition, a second air switch QF2 can be set between the methane power-off module 1201 and the other secondary windings 101 and 102 of the transformer 21 to protect the methane power-off module 1201.

[0131] In summary, in this embodiment, the methane power-off module 1201 is used to detect the methane concentration in the environment around the haulage vehicle and send a methane excess signal to the control module 1 when the methane concentration is too high, so that the control module 1 controls the oil pump motor M1 to cut off power, thereby improving the safety of the haulage vehicle during operation and ensuring the safety of underground personnel.

[0132] As a preferred embodiment, it also includes an infrared sensing module 1301 connected to the control module 1;

[0133] The infrared sensing module 1301 is used to send a danger signal to the control module 1 when an obstacle is detected within a preset range around the haulage vehicle;

[0134] The control module 1 is also used to control the oil pump motor M1 to cut off power when receiving a danger signal.

[0135] Considering that there are many unknown obstacles in the coal mine, it is difficult for the driver to observe all dangerous situations. Therefore, in this embodiment, an infrared sensing module 1301 is set to detect obstacles within a preset range around the hauling vehicle. The infrared sensing module 1301 may include multiple infrared sensors, and when it is detected that obstacles within a preset range around the hauling vehicle block the infrared rays emitted by the infrared sensing module 1301, a danger signal is sent to the control module 1, so that the control module 1 controls the oil pump motor M1 to cut off the power. For example, please refer to Fig.10 , Fig.10The schematic diagram of the structure of the infrared sensing module in the electric control device of a hauling vehicle provided by the present invention is as follows. The power supply of the infrared sensing module 1301 can be, but is not limited to, provided by the switching power supply 71. When the infrared sensing module 1301 includes two infrared sensors, the normally closed contacts of the two infrared sensors are connected in series, one end of the normally closed contact of one infrared sensor is connected to the X10 input end of the control module 1, and one end of the normally closed contact of the other infrared sensor is connected to the 24V level signal. When one of the infrared sensors detects that an obstacle within a preset range around the hauling vehicle blocks the infrared rays emitted by the infrared sensing module 1301, the normally closed contact of the infrared sensor detecting the obstacle opens, the X10 input end of the control module 1 loses the 24V level signal, and the control module 1 controls the oil pump motor M1 to cut off the power. In summary, in this embodiment, by setting the infrared sensing module 1301, the control module 1 automatically controls the oil pump motor M1 to cut off the power when there are obstacles around the hauling vehicle. The safety and stability of the hauling vehicle during operation are further improved.

[0136] As a preferred embodiment, it also includes an alarm module connected to the control module 1, and the alarm module is used to alarm when receiving an alarm signal;

[0137] The control module 1 is also used to send an alarm signal to the alarm module when an alarm instruction is received, when the oil pump motor M1 is started, when the temperature exceeds a preset temperature, or when the operating current is not within a preset current range.

[0138] In order to remind the driver to deal with the abnormality of the oil pump motor M1 and to remind the staff in the surrounding area to stay away when the haul truck is started, an alarm module is set in this embodiment. When the driver observes that the surrounding environment is abnormal, such as the presence of staff, an alarm instruction is sent to the control module 1 so that the control module 1 controls the alarm module to alarm. When the oil pump motor M1 is started or the temperature exceeds the preset temperature or the working current is not within the preset current range, the control module 1 will automatically control the alarm module to alarm. For details, please refer to Fig.11 and Fig.12 , Fig.11 A partial structural schematic diagram of another electric control device for a haulage vehicle provided by the present invention, Fig.12A partial structural diagram of another electric control device of a hauling vehicle provided by the present invention. The alarm module here can be an electric bell 81, or an audible and visual alarm 1101, or a combination of the electric bell 81 and the audible and visual alarm 1101, and this embodiment is not particularly limited here. For example, when the alarm module is an electric bell 81, when the X4 input terminal of the control module 1 receives an alarm instruction or the oil pump motor M1 is started or the temperature exceeds the preset temperature or the working current is not within the preset current range, the control module 1 controls the coil of the fourth relay J1 to be energized through the Y2 output terminal, and the normally open contact J1.1 of the fourth relay J1 is closed, and the electric bell 81 issues an alarm. When the alarm module is an audible and visual alarm 1101, when the X4 input terminal of the control module 1 receives an alarm instruction or the oil pump motor M1 is started or the temperature exceeds the preset temperature or the working current is not within the preset current range, the control module 1 controls the audible and visual alarm 1101 to alarm through RS485 communication. The electric bell here can be, but is not limited to, a mining explosion-proof electric bell. In addition, the alarm module may also, but is not limited to, alarm when the methane concentration in the environment surrounding the haulage vehicle exceeds the standard and the voltage detected by the voltage detection module is not within a preset voltage range.

[0139] In summary, by providing an alarm module, the hauling truck can give an alarm in time in dangerous situations, thereby improving the safety of the hauling truck.

[0140] Please refer to Fig.13 and Fig.10 , Fig.13 A partial structural schematic diagram of another electric control device of a haulage vehicle provided by the present invention.

[0141] In order to facilitate the driver to observe the situation around the haul truck, a monitor 92 and multiple cameras 91 can also be set. The monitor 92 is powered by the secondary winding of the transformer 21, and the power supply of the camera 91 comes from the AC output of the secondary winding of the transformer 21 transferred by the monitor 92. The camera 91 transmits the video signal to the monitor 92 through a video cable, and the haul truck driver views the image of the blind spot through the monitor 92 to operate. The monitor 92 here can be, but not limited to, a mine flameproof monitor, and the camera 91 here can be, but not limited to, a mine flameproof camera.

[0142] Considering that the driver's vision will be affected when the lighting conditions in the coal mine are very poor, a lighting module can also be set. The lighting module can be but not limited to LED lights. For details, please refer to Figure 2 , Figure 2A partial structural schematic diagram of another electric control device of a hauling vehicle provided by the present invention, wherein a lighting module includes four LED lamps, a first LED lamp L1, a second LED lamp L2, a third LED lamp L3 and a fourth LED lamp L4, and the lighting module is powered by a transformer 21. A third air switch QF3 may also be provided between the lighting module and the transformer 21 to provide protection for the lighting module.

[0143] In order to quickly stop the oil pump motor M1 in an emergency, an emergency stop module can also be set. The emergency stop module can include multiple emergency stop buttons, which are distributed in different positions of the tractor. For details, please refer to Fig.14 , Fig.14 A partial structural diagram of another electric control device of a haulage vehicle provided by the present invention, when the emergency stop module includes two emergency stop buttons, the two emergency stop buttons are distributed on both sides of the haulage vehicle. The first emergency stop button JT1 and the second emergency stop button JT2 are connected in series. When one of the emergency stop buttons is triggered, the processor X3 loses the 24V level signal, and the control module 1 controls the oil pump motor M1 to stop.

[0144] The present invention further provides a haulage vehicle, comprising an oil pump motor M1 and the electric control device of the haulage vehicle as described above.

[0145] The oil pump motor M1 here can be, but is not limited to, an asynchronous motor.

[0146] For other related introductions about the tug truck, please refer to the above embodiments, and this application will not go into details here.

[0147] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0148] It should also be noted that, in this specification, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0149] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An electric control device for a haulage vehicle, characterized in that: The tractor includes an oil pump motor, and the electric control device includes: A current acquisition module, used for acquiring the power supply current of the oil pump motor; A temperature acquisition module, used to acquire the temperature of the oil pump motor; A leakage detection module, used for detecting the insulation resistance value of the power supply circuit of the oil pump motor when the oil pump motor is powered off, and stopping detecting the insulation resistance value of the power supply circuit of the oil pump motor when the oil pump motor is started; A control module, the control module is used to control the power supply to supply power to the oil pump motor to start the oil pump motor and control the leakage detection module to stop working when receiving a start command and the insulation resistance value is greater than a preset insulation resistance value; when receiving a stop command or the temperature exceeds a preset temperature or the power supply current is not within a preset current range, control the power supply to stop supplying power to the oil pump motor to stop the oil pump motor and control the leakage detection module to start working; Also includes transformers; The primary winding of the transformer is connected to the power supply, and the secondary winding of the transformer is connected to the power supply end of the leakage detection module, so as to supply power to the leakage detection module after reducing and converting the alternating current output by the power supply; A switching power supply, the input end of which is connected to the secondary winding, and the output end of which is respectively connected to the control module and the temperature acquisition module, for rectifying the alternating current output by the transformer and then supplying power to the control module and the temperature acquisition module; The control module includes a processing module, a first relay, a second relay and a contactor; A first end of the coil of the first relay is connected to the output end of the processing module, and a second end is connected to the positive electrode of the switching power supply; A first end of the normally open contact of the first relay is connected to a first end of the secondary winding, and a second end is connected to a first end of the coil of the second relay; A second end of the coil of the second relay is connected to a second end of the secondary winding; A first end of the normally open contact of the second relay is connected to a first end of the coil of the contactor, and a second end is connected to a second end of the secondary winding; The second end of the coil of the contactor is connected to the first end of the secondary winding; The first end of the normally open contact of the contactor is connected to the power supply, and the second end is connected to the oil pump motor; The processing module is used to control the leakage detection module to stop working and control the coil of the first relay to be energized when receiving the start instruction, so that the power supply supplies power to the oil pump motor to start the oil pump motor; when receiving the stop instruction or when the temperature exceeds the preset temperature or when the power supply current is not within the preset current range, control the leakage detection module to start working and control the coil of the first relay to be de-energized, so that the power supply stops supplying power to the oil pump motor to stop the oil pump motor; The second relay and the contactor both further include normally closed contacts; A first end of the normally closed contact of the second relay is connected to a first end of the normally closed contact of the contactor, and a second end is connected to a detection end of the leakage detection module; The second end of the normally closed contact of the contactor is connected to the power supply line between the normally open contact of the contactor and the oil pump motor; The normally closed contacts of the second relay and the normally closed contacts of the contactor are both used to close when the coil of the first relay is powered off so that the leakage detection module starts working, and to open when the coil of the first relay is powered on so that the leakage detection module stops working.

2. The electric control device of the haulage vehicle according to claim 1, characterized in that: Also includes a voltage detection module; The voltage detection module is used to detect the output voltage of the secondary winding; The control module is also used to determine the output voltage of the power supply based on the output voltage of the secondary winding and the turns ratio of the primary and secondary windings of the transformer. When it is determined that the output voltage of the power supply is not within a preset voltage range, the control module controls the power supply to stop supplying power to the oil pump motor to shut down the oil pump motor and controls the leakage detection module to start working.

3. The electric control device of the haulage vehicle according to claim 1, characterized in that: Also includes: A remote control receiver is used to send the start command or the stop command to the control module when receiving the start command or the stop command sent by the remote control, and to control the solenoid valve of the trolley according to the control command when receiving the control command sent by the remote control, so as to control the movement of the trolley or the rocker arm action of the trolley through the solenoid valve when the oil pump motor is started.

4. The electric control device of the haulage vehicle according to claim 3, characterized in that: Also included is a third relay; The first end of the normally open contact of the third relay is connected to the power supply end of the remote control receiver, and the second end is connected to the switching power supply; the first end of the coil of the third relay is connected to the control module, and the second end is connected to the switching power supply; The switching power supply is also used to supply power to the remote control receiver; The control module is also used to control the coil of the third relay to be energized when receiving a remote control mode command so that the remote control receiver is powered on; and to control the coil of the third relay to be de-energized when receiving a local mode command so that the remote control receiver is powered off.

5. The electric control device of the haulage vehicle according to claim 1, characterized in that: Also included is a methane power-off module connected to the control module; The methane power-off module is used to detect the methane concentration in the environment around the haulage vehicle, and when the methane concentration exceeds a preset concentration, sends a methane exceeding standard signal to the control module; The control module is also used to control the oil pump motor to cut off power when receiving the methane exceeding standard signal.

6. The electric control device of the haulage vehicle according to claim 1, characterized in that: Also includes an infrared sensing module connected to the control module; The infrared sensing module is used to send a danger signal to the control module when an obstacle is detected within a preset range around the hauling vehicle; The control module is also used to control the oil pump motor to cut off power when receiving the danger signal.

7. The electric control device of the haulage vehicle according to any one of claims 1 to 6, characterized in that: Also included is an alarm module connected to the control module, the alarm module is used to alarm when receiving an alarm signal; The control module is further configured to send the alarm signal to the alarm module when an alarm instruction is received, when the oil pump motor is started, when the temperature exceeds a preset temperature, or when the power supply current is not within the preset current range.

8. A haulage vehicle, characterized in that: The electric control device of the hauling vehicle comprises the oil pump motor and any one of claims 1 to 7.

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