Disclosure of Invention
The invention provides an external power grid access system of an operation machine and the operation machine, which are used for solving the defects of thick cable, heavy weight and inconvenient operation of the external power grid in the prior art, and realizing the reduction of the thickness of the cable, the reduction of the quality of the cable, and the convenient operation and the saving of economic cost.
The invention provides an external power grid access system of a working machine, which comprises: the device comprises a boosting device, a power-on operation cable and a charging gun;
one end of the charging gun is connected with a motor controller of the working machine, the other end of the charging gun is connected with the power-on operation cable, and the power-on operation cable is also connected with a power distribution cabinet through the boosting equipment;
the boost device is used for boosting the accessed alternating voltage of the power distribution cabinet to a target voltage, and the plug-in operation cable is used for conveying the target voltage to a motor controller of the operation machine through the charging plug gun so as to provide power for the operation machine.
According to the external power grid access system of the working machine, the input end of the boosting equipment is connected with the power distribution cabinet, and the output end of the boosting equipment is connected with the plug-in working cable;
the boosting equipment is used for boosting the accessed alternating voltage of the power distribution cabinet to a target voltage; the step-up device includes a transformer.
The external power grid access system of the working machine further comprises a circuit protection device;
the input end of the circuit protection device is connected with the power distribution cabinet, and the output end of the circuit protection device is connected with the boosting equipment;
when the external power grid access system has a safety problem, the circuit protection device cuts off the connection between the power distribution cabinet and the plug-in operation cable. Power distribution cabinet
According to the external power grid access system of the working machine, the circuit protection device comprises a circuit breaker and a leakage protector; the circuit breaker includes an air switch.
According to the external power grid access system of the working machine provided by the invention, when the external power grid access system has a safety problem, the circuit protection device cuts off the connection between the power distribution cabinet and the plug-in working cable, and the circuit protection device comprises:
when the plugging operation cable has electric leakage, the electric leakage protector cuts off the connection between the power distribution cabinet and the plugging operation cable;
when overcurrent or overvoltage occurs in the external power grid access system, the circuit breaker cuts off the connection between the power distribution cabinet and the plug-in operation cable. Power distribution cabinet
According to the external power grid access system of the working machine, the boosting equipment, the circuit breaker and the leakage protector are independently arranged or integrally formed.
The external power grid access system of the working machine provided by the invention further comprises an alarm;
the alarm is connected with the circuit breaker and the leakage protector;
when the circuit breaker or the leakage protector cuts off the connection between the power distribution cabinet and the plug-in operation cable, the alarm gives out an alarm prompt.
The external power grid access system of the working machine provided by the invention further comprises a rectifying module;
one end of the rectifying module is connected with the charging gun, and the other end of the rectifying module is connected with a motor controller of the working machine;
the rectification module is used for converting the target voltage into direct current voltage.
The external power grid access system of the working machine provided by the invention further comprises a voltage reduction module;
one end of the voltage reducing module is connected with the charging gun, and the other end of the voltage reducing module is connected with the rectifying module; the step-down module is configured to reduce the target voltage to a rated voltage to power the work machine.
The invention also provides a working machine, which comprises a working machine body and an external power grid access system of the working machine;
the working machine body is connected with an external alternating current power supply through an external power grid access system of the working machine.
The invention provides an external power grid access system of a working machine and the working machine, wherein the external power grid access system comprises: the device comprises a boosting device, a power-on operation cable and a charging gun; one end of the charging gun is connected with a motor controller of the working machine, the other end of the charging gun is connected with the power-on operation cable, and the power-on operation cable is also connected with a power distribution cabinet through the boosting equipment; the boost device is used for boosting the accessed alternating voltage of the power distribution cabinet to a target voltage, the plug-in operation cable is used for conveying the target voltage to the motor controller of the operation machine through the charging plug gun so as to provide power for the operation machine, under the condition of unchanged power, the input current can be effectively reduced by lifting the voltage of an external power supply, so that the thickness of the cable can be reduced, the thinner cable is adopted for power transmission, the quality of the cable is effectively reduced, the operation is more convenient, and the cable cost is saved to a certain extent.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The external grid access system of the work machine and the work machine of the present invention are described below with reference to fig. 1 to 2.
Fig. 1 is a schematic structural diagram of an external power grid access system of a working machine according to the present invention.
As shown in fig. 1, an external power grid access system of an operation machine according to an embodiment of the present invention includes: the power-up device 1, the power-on operation cable 2 and the charging gun 3; one end of the charging gun 3 is connected with a motor controller of the working machine B, the other end of the charging gun 3 is connected with the power-on working cable 2, and the power-on working cable 2 is also connected with the power distribution cabinet A through the boosting equipment 1; the boost device 1 is used for boosting the alternating voltage of the connected power distribution cabinet A to a target voltage, and the plug-in operation cable 2 is used for conveying the target voltage to a motor controller of the operation machine B through the charging plug-in gun 3 so as to provide power for the operation machine B.
In a specific implementation process, an electric crane is taken as an example for explanation, and the electric crane is connected with a power distribution cabinet a of an alternating current power supply through an inserting operation cable 2 so as to provide power support for the crane, and the power of the crane in operation is constant, namely p=ui, wherein P represents power, U represents working voltage, and I represents working current. In order to ensure power during the operation of the crane, the current is continuously increased under the condition of voltage determination, namely the thickness of the cable is correspondingly increased. However, in this embodiment, the booster device 1 is added, the booster device 1 is disposed between the power distribution cabinet a and the plugging operation cable 2, that is, the booster device 1 firstly boosts the voltage of the plugged power distribution cabinet a, the ac voltage of the common utility power is raised to the required target voltage, the specific target voltage value is a value determined manually according to the actual situation, that is, the voltage is required, the booster device 1 is used to raise the external ac voltage to the required value, then the raised target voltage is transmitted to the operation machine B through the plugging operation cable 2, then the ac voltage is converted into the dc voltage through the rectifying module 7 disposed between the charging plug gun 3 and the motor controller, so as to ensure the operation of the operation machine B, and the rectifying module 7 has the main function of converting the ac into the dc. Specifically, since the external power supply power distribution cabinet a is usually ac, the boosting device 1 can be usually selected as a transformer, the input end of the transformer is connected with the power supply power distribution cabinet a, the output end of the transformer is connected with the power plug-in operation cable 2, and the accessed ac power supply is subjected to transformation treatment through the miniature transformer so as to ensure that the required power is achieved.
For example, when the electric crane works, the power supply distribution cabinet A is connected with the power plug-in operation cable 2 through the boosting equipment 1, the alternating current power supply is firstly lifted, then the alternating current power supply is connected with the motor controller of the crane through the charging plug-in gun 3, and finally the motor of the crane is controlled to enter a working state. Without the booster device 1, the heavy cables are not easy to operate, and the workers are inconvenient to take and move the cables. After the step-up device 1 is added, the current required by the same power is reduced due to the voltage rise, so that the thickness of the cable can be reduced, and the weight of the cable is reduced due to the reduction of the thickness, thereby being more convenient for related personnel to operate. The crane can reduce the thickness of the cable without reducing the working efficiency. Of course, the voltage transformation device may be selected according to the power type of the power distribution cabinet a, the alternating current may be selected as the corresponding transformer, and if the alternating current is direct current, the corresponding triode booster circuit and the like are directly selected, which is not described in detail in this embodiment.
The embodiment of the invention provides an external power grid access system of a working machine, which comprises the following components: the power-up device 1, the power-on operation cable 2 and the charging gun 3; one end of the charging gun 3 is connected with a motor controller of the working machine B, the other end of the charging gun 3 is connected with the power-on operation cable 2, and the power-on operation cable 2 is also connected with the power distribution cabinet A through the boosting equipment 1; the boost device 1 is used for boosting the accessed alternating voltage of the power distribution cabinet A to a target voltage, the plug-in operation cable 2 is used for conveying the target voltage to the motor controller of the operation machine B through the charging plug gun 3 so as to provide power for the operation machine B, under the condition of unchanged power, the input current can be effectively reduced by lifting the voltage of an external power supply, so that the thickness of the cable can be reduced, the thinner cable is adopted for power transmission, the quality of the cable is effectively reduced, the operation is more convenient, and the cable cost is saved to a certain extent.
Fig. 2 is a second schematic structural diagram of an external power grid access system of the working machine according to the present invention.
Further, as shown in fig. 2, the large-sized working machine has serious consequences when the working machine fails due to the huge volume, and has high requirements on the cable due to the electric power supply mode, and serious damage is caused when the cable 2 is damaged during the plugging operation. In order to avoid hidden danger caused by damage to the cable 2 during the power plug operation, in this embodiment, a circuit protection device may be further provided, where when a safety problem occurs in the external power grid access system, the circuit protection device cuts off connection between the power distribution cabinet and the cable during the power plug operation. The specific circuit protection device comprises a circuit breaker 4, a leakage protector and the like; the input end of the circuit breaker 4 is connected with the power distribution cabinet A, and the output end of the circuit breaker 4 is connected with the boosting equipment 1; when the external power grid access system has the condition of overcurrent, overvoltage or short circuit, the circuit breaker 4 cuts off the connection between the power distribution cabinet and the plug-in operation cable 2. The circuit breaker 4 may be an air switch, which is also called an air circuit breaker 4, and is a type of switch that automatically opens whenever the current in the circuit exceeds the rated current. Besides the contact and breaking of the circuit, the motor can also protect short circuits, serious overload, undervoltage and the like of the circuit or electric equipment, and can be used for starting the motor infrequently. By the circuit breaker 4, when the plugging operation cable 2 is damaged, the safety of personnel around the plugging operation cable 2 can be ensured.
Meanwhile, in order to further ensure the electricity safety, the embodiment also comprises a leakage protector 5; the input end of the leakage protector 5 is connected with the power distribution cabinet A, and the output end of the leakage protector 5 is connected with the boosting equipment 1; when the electric leakage occurs in the electric plug-in operation cable 2, the electric leakage protector 5 cuts off the connection between the power distribution cabinet and the electric plug-in operation cable 2. The leakage protector 5, abbreviated as leakage switch, is mainly used for protecting the life of the equipment from electric shock when the equipment fails and is fatal, has overload and short-circuit protection functions, can be used for protecting the overload and short circuit of the circuit or the motor, and can also be used for starting the circuit without frequent conversion under normal conditions. The circuit breaker 4 and the leakage protector 5 are arranged between the power distribution cabinet and the boosting equipment 1, so that the input of cutting off the power supply can be timely completed no matter the boosting equipment 1, the plug-in operation cable 2 or the operation machine B has any circuit fault, and meanwhile, the personal safety around the plug-in operation cable 2 can be better ensured. That is, when the power plug-in operation cable leaks electricity, the electricity leakage protector cuts off the connection between the power distribution cabinet and the power plug-in operation cable; when overcurrent or overvoltage occurs in the external power grid access system, the circuit breaker cuts off the connection between the power distribution cabinet and the plug-in operation cable. Therefore, no matter what circuit faults occur, the power supply can be ensured to be safe to use.
In order to save space better, the boost device 1, the circuit breaker 4 and the leakage protector 5 can be independently arranged or integrally formed, the independent arrangement is that three components are respectively connected in series, the integrally formed arrangement can be used for intensively arranging the boost device 1, the circuit breaker 4 and the leakage protector 5 in the same protection cabinet, so that the normal work of each device can be ensured, the damage to the boost device 1, the circuit breaker 4 and the leakage protector 5 caused by objects such as dust can be avoided, and the service life of the boost device can be effectively prolonged.
Furthermore, in order to better ensure personnel safety, an alarm can be further arranged, and the alarm is connected with the circuit breaker 4 and the leakage protector 5; when the breaker 4 or the earth leakage protector 5 cuts off the connection between the power distribution cabinet and the plug-in operation cable 2, the alarm gives an alarm prompt. The alarm prompt can be sent to remind operators, other related operators beside the working machine B can be better reminded, the life safety of each operator is guaranteed, and for example, an audible and visual alarm mode can be selected to send out the prompt.
Furthermore, in order to ensure the normal operation of the working machine, the charging gun 3 may be processed in two technical ways after receiving the high-voltage ac power. The high-voltage motor controller B1 can be directly controlled by the rectification module 7 to output direct current and can be used on a high-voltage platform, and then the high-voltage motor controller B1 controls the high-voltage motor B2 to output power, so that the working machine B works. The other is that a depressurization module 6 is added at the rear end of the charging gun 3, one end of the depressurization module 6 is connected with the charging gun 3, and the other end is connected with a rectification module 7; the voltage reducing module 6 is used for reducing the target voltage to the rated voltage, reducing the voltage to a common voltage platform, and converting the voltage to a direct current electric control motor controller B1 through the rectifying module 7 so as to control the motor B2 to output power, thereby realizing the control of the working machine B.
Based on the same general inventive concept, the application also protects a working machine B, comprising a working machine B body and the external power grid access system of the working machine B of any of the above embodiments; the working machine B body is connected with an external alternating current power supply through an external power grid access system of the working machine B.
The apparatus embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
From the above description of the embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by means of software plus necessary general hardware platforms, or of course may be implemented by means of hardware. Based on this understanding, the foregoing technical solution may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as ROM/RAM, a magnetic disk, an optical disk, etc., including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method described in the respective embodiments or some parts of the embodiments.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.