A leveling device with energy recovery function and method thereof

Abstract

The present invention discloses a leveling device with energy recovery function and a method thereof, comprising a leveling machine and an energy recovery device; the leveling machine performs leveling operation by electromagnetic induction heating, the energy recovery device collects wind energy generated when the leveling machine is working and converts it into electric energy for use by a mobile heating trolley; the leveling machine comprises a variable frequency power supply, a chiller, and a mobile heating trolley; the variable frequency power supply is installed above the chiller, and the power required by the chiller is provided through a first wire assembly, and is transmitted to the mobile heating trolley through a second wire assembly; a coaxial transformer and an electromagnetic induction heating coil are installed in the mobile heating trolley, the coaxial transformer is used to reduce the current input by the variable frequency power supply to a safe voltage range, and the chiller is used to transfer the heat in the variable frequency power supply and the mobile heating trolley; the energy recovery device comprises a power generation part on the front side of the chiller and a current conversion part on the mobile heating trolley. The present invention can effectively improve the energy utilization rate of the leveling device.

Description

Technical Field

[0001] The invention belongs to the technical field of welding deformation leveling, and in particular relates to a leveling device with energy recovery function and a method thereof. Background Art

[0002] At present, in shipbuilding and marine engineering, large structural parts are mainly connected by fusion welding. The uneven local heating of steel by welding arc will inevitably cause stress and deformation in large structural parts. Therefore, flame correction is widely used in the production process to eliminate stress and strain in large structural parts. Flame correction utilizes the physical characteristics of metal thermal expansion and contraction. The flame is used to locally heat the metal. The thermal expansion part is restricted by the surrounding cold metal and cannot be deformed freely, but produces compression plastic deformation. After cooling, the compression plastic deformation remains, causing local contraction, that is, accumulation force is generated at the heated part, so that the deformation of the metal component is corrected. However, flame correction is a difficult job to operate. Improper method mastery and temperature control will also cause new and greater deformation of the component. It requires high experience of the operator, and toxic gases will be generated during the heating process, which is harmful to the environment and the health of the operator. In addition, the labor intensity of water and fire correction is high and the environment is poor, so fewer and fewer people are willing to engage in this industry.

[0003] Electromagnetic induction heating technology is a new type of heating technology. It uses the principle of high-frequency electric heating to convert alternating current into high-frequency current to generate a high-frequency magnetic field. When the magnetic lines of force in the magnetic field act on the outer shell of the iron container through the insulating plate, the magnetic lines of force are cut, generating a large number of small eddy currents, causing the iron container to heat up quickly, thereby achieving the purpose of heating. This technology has the advantages of being clean, efficient, and easy to operate, so it has broad application prospects in the industrial field, but the market share is not very high. The reason is that in the process of implementing this technology, the power is large and the loss is high, which is not conducive to achieving the goal of energy conservation and emission reduction.

[0004] Chinese patent application (202110031588.7) discloses an intelligent mobile electromagnetic induction leveling device and method thereof, and Chinese patent application (201721653101.4) discloses a mobile heater for an induction heating leveling machine. Both Chinese patent applications use electromagnetic induction heating technology to level the welding deformation area of ​​the steel plate, that is, using the principle of high-frequency electric heating, the alternating current is converted into a high-frequency current to generate a high-frequency magnetic field, thereby generating eddy currents in the welding deformation area of ​​the steel plate to achieve the purpose of electromagnetic induction heating; Chinese patent application (202110386221.7) discloses an integrated method for automatic induction leveling of ship plate welding deformation. On the basis of using electromagnetic induction heating to level the ship plate, the AGV car identifies the working area, and then plans the route for the AGV car to perform electromagnetic induction heating leveling to achieve the effect of automatic leveling. However, the above technologies are all based on electromagnetic induction technology to achieve automatic leveling, but fail to overcome the defects of electromagnetic induction heating technology, such as high power consumption, large loss, and low efficiency. Summary of the invention

[0005] The purpose of the present invention is to overcome the defects of the prior art and provide a leveling device with energy recovery function and a working method thereof. The present invention can convert the wind energy generated by the chiller heat dissipation into electrical energy during the weld leveling process, so as to power the mobile heating trolley in the leveling device, thereby improving the energy utilization efficiency of the leveling device.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions.

[0007] A leveling device with energy recovery function of the present invention comprises a leveling machine and an energy recovery device which are electrically connected; the leveling machine operates on the leveling area by the electromagnetic induction heating principle, and the energy recovery device collects the wind energy generated by the leveling machine during operation and converts it into electrical energy for use by a mobile heating trolley of the leveling machine;

[0008] The leveling machine comprises a variable frequency power supply, a chiller, and a mobile heating trolley; the chiller is connected to the variable frequency power supply through a first water pipe assembly, and the variable frequency power supply is connected to the mobile heating trolley through a second water pipe assembly; the variable frequency power supply is installed above the chiller, and provides the power required by the chiller through a first wire assembly, and is used to convert the input current into a high-frequency and high-voltage form, and transmit it to the mobile heating trolley through a second wire assembly; an embedded system-on-chip is provided inside the variable frequency power supply, which is used to control the energy recovery device, the chiller, and the mobile heating trolley; a coaxial transformer and an electromagnetic induction heating coil are installed in the mobile heating trolley, the coaxial transformer is used to reduce the current input by the variable frequency power supply to a safe voltage range, and the electromagnetic induction heating coil performs leveling operations through the electromagnetic induction principle; the chiller is used to transfer heat from the variable frequency power supply and the mobile heating trolley;

[0009] The energy recovery device comprises a power generation part installed on the front side of the chiller and a current conversion part installed on the mobile heating trolley of the leveling machine.

[0010] Furthermore, the power generation part of the energy recovery device includes a power generation device housing, an impeller, a frame, a speed increasing gearbox, a brake, and a generator; the impeller is mounted on the generator housing through a bearing; the power generation device housing is mounted at the center position of the side of the "cross" on the frame; the generator is mounted inside the power generation device housing and is connected to the impeller through a brake and a speed increasing gearbox.

[0011] Specifically, the current conversion part of the energy recovery device includes a rectifier, a battery, and an inverter; the battery is installed on the mobile heating trolley of the leveling machine, and the rectifier and inverter are installed on both sides of the battery. The rectifier adopts a three-phase Y-type connection method: the current flows in through the a terminal, passes through the thyristor vs1, the resistor R and the thyristor vs2, and flows out from the c terminal; flows in from the b terminal, passes through the thyristor vs3, the resistor R and the thyristor vs4, and flows out from the c terminal; the current flows in from the c terminal, passes through the thyristor vs5, the resistor R and the thyristor vs6, and flows out from the b terminal; it adopts double narrow pulse or wide pulse triggering, and its phase shift range is 0° to 120°, and the maximum conduction angle is 120°.

[0012] Specifically, in the inverter, under a pure resistance load, diodes D1, D2, D3, D4, D5 and D6 are not conducting; when switches T1, T5 and T6 are conducting, R1 and R3 are connected in parallel, and the current flows out from the positive electrode, flows through resistors R1 and R3 at the same time, flows through resistor R2 and switch T6, and finally flows into the negative electrode; when switches T1, T2 and T6 are conducting, R2 and R3 are connected in parallel, and the current flows out from the positive electrode, flows through resistor R1, flows through resistor R2 and switch T6 one way, and flows into the negative electrode, and flows through resistor R3 and switch T2 the other way, and flows into the negative electrode; when switches T1, T2 and T3 are conducting, R1 and R2 are connected in parallel, and the current flows out from the positive electrode, flows through resistors R1 and R2 at the same time, and flows through resistor R 2 and switch T2, and finally flows into the negative electrode; when switches T2, T3, and T4 are turned on, R1 and R3 are connected in parallel, and the current flows out from the positive electrode, flows through the resistor R2, and then flows into the negative electrode after passing through the resistor R3 and switch T2, and flows into the negative electrode after passing through the resistor R1 and switch T4; when switches T3, T4, and T5 are turned on, R2 and R3 are connected in parallel, and the current flows out from the positive electrode, flows through the resistors R and R3 at the same time, and then flows through the resistor R1 and switch T4, and finally flows into the negative electrode; when switches T4, T5, and T6 are turned on, R1 and R2 are connected in parallel, and the current flows out from the positive electrode, flows through the resistor R3, and then flows into the negative electrode after passing through the resistor R1 and switch T4, and flows into the negative electrode after passing through the resistor R2 and switch T6.

[0013] Specifically, the variable frequency power supply is packaged separately and arranged above the outer side of the chiller.

[0014] Furthermore, the embedded system inside the variable frequency power supply controls the charging and discharging processes of the battery of the energy recovery device in the following manner: when the battery of the energy recovery device is sufficiently charged, it directly supplies power to the mobile heating cart of the leveling machine; when the battery is insufficient, the embedded system inside the variable frequency power supply of the leveling machine directly supplies power to the mobile heating cart of the leveling machine.

[0015] A leveling method with energy recovery function of the present invention comprises the following steps:

[0016] Step 1: Connect the power supply, start the leveling machine, and turn the frequency conversion power supply knob to turn on the frequency conversion power supply;

[0017] Step 2: Press the button on the variable frequency power supply to start the chiller;

[0018] Step 3: Push the leveler to the area where work is required, start the heating function, and transmit the high-frequency AC current to the variable frequency power supply through the transmission line. After the current is converted by frequency conversion, it is transmitted to the mobile heating trolley, which performs the leveling operation through the principle of electromagnetic induction heating.

[0019] Step 4: The chiller starts working, and the temperature emitted by the variable frequency power supply of the leveling machine and the mobile heating trolley is transferred to the refrigerant through water circulation in the evaporator. After the refrigerant releases heat in the condenser, it returns to the evaporator, completing the refrigerant circulation and the entire heat dissipation process;

[0020] Step 5: The energy recovery device starts to collect the wind energy generated by the chiller during the heat dissipation process, converts it into three-phase alternating current through the generator, converts it into direct current through the rectifier, and stores it in the battery;

[0021] Step 6: After the weld is leveled, the mobile heating trolley moves to the next area for leveling. When the battery power is low, the embedded system-on-chip directly supplies power through the variable frequency power supply to allow the mobile heating trolley to work normally. When the battery power is sufficient, the embedded system-on-chip controls the energy recovery device to provide power for the mobile heating trolley.

[0022] Step 7. When the leveling work of the entire area is completed, rotate the knob on the variable frequency power supply, disconnect the power supply, turn off the entire device, and drain the water in the chiller.

[0023] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0024] 1. The leveling device with energy recovery function of the present invention can collect and store the wind energy generated by the leveling machine during the leveling operation, and convert it into electrical energy for use by the mobile heating trolley, thereby reducing the energy loss of the leveling device during operation and improving the energy utilization rate.

[0025] 2. The present invention adopts an energy recovery device, which can convert the recovered energy into electrical energy and store it in a battery for use by the mobile heating cart; when the battery is low on power, the variable frequency power supply can directly power it to ensure the normal operation of the mobile heating cart, thereby increasing the safety and reliability of the leveling device.

[0026] 3. The energy recovery device used in the present invention has a simple structure, which improves energy utilization and is convenient for inspection and maintenance.

[0027] 4. The present invention places the variable frequency power supply on top of the chiller, which can prevent the temperature inside the chiller from affecting the variable frequency power supply, and also avoid the potential safety hazard of the variable frequency power supply caused by water leakage of the chiller.

[0028] 5. The energy recovery device of the present invention adopts a cylindrical frame, which can reduce the diffusion direction of wind energy and enhance the utilization efficiency of wind energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the front structure of a leveling device according to an embodiment of the present invention.

[0030] Figure 2 It is a schematic diagram of the rear side structure of a leveling device according to an embodiment of the present invention.

[0031] Figure 3 The figure is a schematic structural diagram of a water chiller according to an embodiment of the present invention.

[0032] 4(a), (b), and (c) are schematic structural diagrams of an energy recovery device according to an embodiment of the present invention.

[0033] Figure 5 A schematic diagram of a rectifier according to an embodiment of the present invention.

[0034] Figure 6 The schematic diagram of an inverter according to an embodiment of the present invention is shown in FIG.

[0035] Figure 7 The present invention is a flowchart of a leveling device with energy recovery function.

[0036] Among them, there are a leveling machine 10, a variable frequency power supply 11, a chiller 12, a mobile heating trolley 13, a power generation device housing 21, an impeller 22, a frame 23, a bearing 24, a speed increasing gearbox 25, a brake 26, a generator 27, a rectifier 28, a battery 29, an inverter 210, a first wire assembly 31, a first water pipe assembly 32, a second wire assembly 33, and a second water pipe assembly 34. DETAILED DESCRIPTION

[0037] The present invention is further described in detail below with reference to the accompanying drawings.

[0038] like Figure 1 As shown, a leveling device with energy recovery function of the present invention includes a leveling machine 10 and an energy recovery device. The leveling machine 10 operates on the area to be leveled by the principle of electromagnetic induction heating. The energy recovery device collects the wind energy generated by the leveling machine 10 during operation, converts it into electrical energy, and supplies it to the mobile heating trolley 13 of the leveling machine 10; the leveling machine 10 and the energy recovery device are electrically connected, and the energy recovery device includes a power generation part installed on the front side of the chiller 12 and a current conversion part installed on the mobile heating trolley 13 of the leveling machine 10, which is used to collect the wind energy generated by the chiller 12 and convert it into electrical energy; as shown Figure 7 As shown, a system working structure block diagram of a leveling device with energy recovery function of the present invention. The embedded system inside the leveling machine variable frequency power supply 11 can control the leveling machine 10 to perform leveling work, and can also control the charging process and discharging process of the battery 29 of the energy recovery device. When the battery 29 of the energy recovery device has sufficient power, it can directly supply power to the mobile heating trolley 13 of the leveling machine 10. When the power is insufficient, the embedded system inside the leveling machine variable frequency power supply 11 can directly supply power to the mobile heating trolley 13 of the leveling machine 10; the charging process of the battery 29 refers to the process in which the energy recovery device converts the recovered energy into electrical energy through the generator 27 and stores the current in the battery 29 through the rectifier 28. The discharging process of the battery 29 refers to the process in which the battery 29 supplies power to the mobile heating trolley 13 through the inverter 210. Its working principle is: the leveling machine 10 performs leveling operations through the principle of electromagnetic induction, wherein the chiller 12 cools the variable frequency power supply 11 and the mobile heating cart 13; the energy recovery device recovers the wind energy generated by the chiller 12 of the leveling machine 10 when cooling, and converts it into electrical energy for use by the mobile heating cart 13 of the leveling machine 10, thereby improving the energy utilization efficiency.

[0039] like Figure 2As shown, the leveling machine 10 includes a variable frequency power supply 11, a chiller 12, a mobile heating trolley 13, a first wire assembly 31, a first water pipe assembly 32, a second wire assembly 33, and a second water pipe assembly 34; the chiller 12 is connected to the variable frequency power supply 11 through the first water pipe assembly 31, and the variable frequency power supply 11 is connected to the mobile heating trolley 13 through the second water pipe assembly 34, forming a loop to cool down the variable frequency power supply 11 and the mobile heating trolley 13; the variable frequency power supply 11 is installed above the chiller 12 (the variable frequency power supply 11 is packaged separately and placed above the outer side of the chiller 12), and provides the power required by the chiller 12 through the first wire assembly 31, which is mainly used to convert the input current into a high frequency and high voltage form, and transmit it to the mobile heating trolley 13 through the second wire assembly 33. An embedded system-on-chip is provided inside the variable frequency power supply 11, which is used to control the energy recovery device, the chiller 12 and the mobile heating trolley 13. The mobile heating trolley 13 is equipped with a coaxial transformer and an electromagnetic induction heating coil. The coaxial transformer is used to reduce the current transmitted by the variable frequency power supply 11 to a safe voltage range, and the electromagnetic induction heating coil performs the leveling operation through the electromagnetic induction principle. Its working principle is: after the three-phase current passes through the variable frequency power supply 11, it is converted into a high frequency and high voltage form, and then the high frequency and high voltage current is transmitted to the coaxial transformer and the electromagnetic induction heating coil in the mobile heating trolley 13. The coaxial transformer converts the high frequency and high voltage current into a high frequency and low voltage current. The current passing through the electromagnetic induction heating coil will generate a strong induced current, i.e., eddy current, thereby realizing the leveling operation; the chiller 12 is used to transfer the heat in the variable frequency power supply 11 and the mobile heating trolley 13.

[0040] like Figure 3 As shown, the chiller 12 includes three interconnected systems: a refrigerant circulation system, a water circulation system, and an electrical automatic control system; the refrigerant circulation system refers to: the liquid refrigerant in the evaporator absorbs the heat in the water and begins to evaporate, and finally the liquid refrigerant completely evaporates and becomes gaseous, and is then sucked into the condenser by the compressor, and the gaseous refrigerant releases heat through the condenser and condenses into liquid, and then becomes a low-temperature and low-pressure refrigerant after throttling through the expansion valve and enters the evaporator to complete the refrigerant circulation process; the water circulation system refers to a water pump that pumps water from the water tank to the equipment that needs to be cooled (mobile heating trolley 13, etc.), the water takes away the heat and the temperature rises, and after transferring the heat to the refrigerant in the evaporator, it returns to the tank to complete the water cycle; the electrical automatic control system mainly includes a power supply part and an automatic control part, the power supply part refers to the power supply for each component in the chiller, and the automatic control part refers to the combination of thermostat, pressure protection, etc., so that the chiller is safer in use.

[0041] As shown in Fig. 4(a), (b) and (c), an energy recovery device of the present invention includes a power generation part installed on the front side of the chiller 12 and a current conversion part installed on the mobile heating trolley 13 of the leveling machine 10. The power generation part, as shown in Fig. 4(a) and (b), includes a power generation device housing 21, an impeller 22, a frame 23, a bearing 24, a speed increasing gearbox 25, a brake 26 and a generator 27. The current conversion part, as shown in Fig. 4(c), includes a rectifier 28, a battery 29 and an inverter 210. The impeller 22 is installed on the generator housing 21 through the bearing 24 for collecting wind energy; the power generation device housing 21 is installed at the center position of the "cross" side of the frame 23. The generator 27 is connected to the impeller 22 through the brake 26 and the speed increaser 25, and is used to convert the energy collected by the impeller 22 into electrical energy. The speed increaser gearbox 25 can improve the utilization effect of wind energy. The brake 26 is used for emergency braking to protect the generator 27. The speed increaser gearbox 25, the brake 26, and the generator 27 are installed inside the power generation device housing 21. The battery 29 is installed on the mobile heating trolley 13 of the leveling machine 10 to store electrical energy; the rectifier 28 and the inverter 210 are respectively installed on both sides of the battery 29 to convert physical quantities such as the frequency and phase of the current.

[0042] like Figure 5 As shown, a circuit schematic diagram of a rectifier 28 of the present invention uses a three-phase Y-type connection. The current flows in through the a terminal, passes through the thyristor vs1, the resistor R and the thyristor vs2, and flows out from the c terminal; the current flows in from the b terminal, passes through the thyristor vs3, the resistor R and the thyristor vs4, and flows out from the c terminal; the current flows in from the c terminal, passes through the thyristor vs5, the resistor R and the thyristor vs6, and flows out from the b terminal. It is beneficial to reduce the harmonics in the transformer flux and electromotive force. In addition, the rectifier circuit must be triggered with a double narrow pulse or a wide pulse, and its phase shift range is 0° to 120°, and the maximum conduction angle is 120°

[0043] like Figure 6As shown, a circuit schematic diagram of an inverter 210 of the present invention; under a pure resistance load, diodes D1, D2, D3, D4, D5 and D6 are not conducting; when switches T1, T5 and T6 are conducting, R1 and R3 are connected in parallel, and the current flows out from the positive electrode, flows through resistors R1 and R3 at the same time, flows through resistor R2 and switch T6, and finally flows into the negative electrode; when switches T1, T2 and T6 are conducting, R2 and R3 are connected in parallel, and the current flows out from the positive electrode, flows through resistor R1, flows through resistor R2 and switch T6 one way, flows into the negative electrode, and flows through resistor R3 and switch T2 the other way, flows into the negative electrode; when switches T1, T2 and T3 are conducting, R1 and R2 are connected in parallel, and the current flows out from the positive electrode, flows through resistors R1 and R2 at the same time, and then flows into the negative electrode. It flows through the resistor R2 and the switch T2, and finally flows into the negative electrode; when the switches T2, T3, and T4 are turned on, R1 and R3 are connected in parallel, the current flows out from the positive electrode, flows through the resistor R2, and then flows into the negative electrode after passing through the resistor R3 and the switch T2, and then flows into the negative electrode after passing through the resistor R1 and the switch T4; when the switches T3, T4, and T5 are turned on, R2 and R3 are connected in parallel, the current flows out from the positive electrode, flows through the resistors R and R3 at the same time, and then flows through the resistor R1 and the switch T4, and finally flows into the negative electrode; when the switches T4, T5, and T6 are turned on, R1 and R2 are connected in parallel, the current flows out from the positive electrode, flows through the resistor R3, and then flows into the negative electrode after passing through the resistor R1 and the switch T4, and then flows into the negative electrode after passing through the resistor R2 and the switch T6. Its working mode is 180-degree conduction mode: the conduction angle of each bridge arm is 120 degrees; the upper and lower bridge arms of the same half bridge conduct electricity, and the conduction angles of each phase differ by 120 degrees; at any moment, three bridge arms are turned on at the same time, and each change is made between the upper and lower bridge arms of the same phase. Therefore, by controlling the switch elements in sequence, the output amplitude can be half of the input voltage, and the waveform of the three-phase output is the same, only the output phase differs by 120 degrees, so that a three-phase AC power supply can be obtained.

[0044] The method for using the above-mentioned leveling device with energy recovery function comprises the following steps:

[0045] Step 1: Connect the power supply, start the leveling machine 10, rotate the knob of the variable frequency power supply 11, and turn on the variable frequency power supply 11;

[0046] Step 2: Press the button 11 on the variable frequency power supply to start the chiller 12;

[0047] Step 3: Push the leveling machine 10 to the area where work is required, start the heating function, and transmit the high-frequency AC current to the variable frequency power supply through the transmission line. After the current is frequency-converted, it is transmitted to the mobile heating trolley 13, and the mobile heating trolley 13 performs the leveling operation through the electromagnetic induction heating principle;

[0048] Step 4: The chiller 12 starts working, and the temperature emitted by the variable frequency power supply 11 of the leveling machine 10 and the mobile heating trolley 13 is transferred to the refrigerant through water circulation in the evaporator. After the refrigerant releases heat in the condenser, it returns to the evaporator, completing the refrigerant circulation and the entire heat dissipation process;

[0049] Step 5: The energy recovery device starts to collect wind energy generated by the chiller 12 during the heat dissipation process, converts it into three-phase alternating current through the generator 27 , converts it into direct current through the rectifier 28 , and stores it in the battery 29 .

[0050] Step six: After the weld is leveled, the mobile heating cart 13 moves to the next area for leveling. At this time, when the battery 29 has low power, the embedded system-on-chip directly supplies power through the variable frequency power supply 11 to allow the mobile heating cart 13 to work normally. When the battery 29 has sufficient power, the embedded system-on-chip controls the energy recovery device to provide power for the mobile heating cart 13.

[0051] Step 7: When the leveling work of the entire area is completed, rotate the knob on the variable frequency power supply 11 to disconnect the power supply, turn off the entire device, and drain the water in the chiller 12.

[0052] In addition, when the wind speed is too high and causes the generator 27 to rotate too fast, or when the energy recovery device fails, the embedded system of the brake 26 will cause the brake 26 to perform emergency braking to avoid damage to components and cause greater losses.

Claims

1. A leveling device with energy recovery function, characterized in that: It comprises an electrically connected leveler (10) and an energy recovery device; the leveler (10) operates on the leveling area by the electromagnetic induction heating principle, and the energy recovery device collects wind energy generated by the leveler (10) during operation and converts it into electrical energy for use by a mobile heating trolley (13) of the leveler (10); The leveling machine (10) comprises a variable frequency power supply (11), a water chiller (12), and a mobile heating trolley (13); the water chiller (12) is connected to the variable frequency power supply (11) via a first water pipe assembly (31), and the variable frequency power supply (11) is connected to the mobile heating trolley (13) via a second water pipe assembly (34); the variable frequency power supply (11) is installed above the water chiller (12), and provides the power required by the water chiller (12) via a first wire assembly, and is used to convert the input current into a high frequency and high voltage form, and transmit the power via a second wire assembly (33). The variable frequency power supply (11) is provided with an embedded system on chip for controlling the energy recovery device, the chiller (12) and the mobile heating trolley (13); a coaxial transformer and an electromagnetic induction heating coil are installed in the mobile heating trolley (13); the coaxial transformer is used to reduce the current input by the variable frequency power supply (11) to a safe voltage range; the electromagnetic induction heating coil performs a leveling operation according to the electromagnetic induction principle; the chiller (12) is used to transfer the heat of the variable frequency power supply (11) and the mobile heating trolley (13); The energy recovery device comprises a power generation part installed on the front side of the chiller (12) and a current conversion part installed on the mobile heating trolley (13) of the leveling machine (10); The current conversion part of the energy recovery device comprises a rectifier (28), a storage battery (29), and an inverter (210); the storage battery (29) is installed on the mobile heating trolley (13) of the leveling machine (10), and the rectifier (28) and the inverter (210) are respectively installed on both sides of the storage battery (29); The rectifier (28) adopts a three-phase Y-type connection method: the current flows in through the a terminal, passes through the thyristor vs1, the resistor R and the thyristor vs2, and flows out from the c terminal; the current flows in through the b terminal, passes through the thyristor vs3, the resistor R and the thyristor vs4, and flows out from the c terminal; the current flows in from the c terminal, passes through the thyristor vs5, the resistor R and the thyristor vs6, and flows out from the b terminal; double narrow pulse or wide pulse triggering is adopted, the phase shift range is 0° to 120°, and the maximum conduction angle is 120°; In the inverter (210), under a pure resistance load, diodes D1, D2, D3, D4, D5 and D6 are not conducting; when switches T1, T5 and T6 are conducting, R1 and R3 are connected in parallel, current flows out from the positive electrode, simultaneously flows through resistors R1 and R3, then flows through resistor R2 and switch T6, and finally flows into the negative electrode; when switches T1, T2 and T6 are conducting, R2 and R3 are connected in parallel, current flows out from the positive electrode, flows through resistor R1, then flows through resistor R2 and switch T6, and then flows into the negative electrode, and then flows through resistor R3 and switch T2, and then flows into the negative electrode; when switches T1, T2 and T3 are conducting, R1 and R2 are connected in parallel, current flows out from the positive electrode, simultaneously flows through resistors R1 and R2, then flows through resistor R 2 and switch T2, and finally flows into the negative electrode; when switches T2, T3, and T4 are turned on, R1 and R3 are connected in parallel, and the current flows out from the positive electrode, flows through the resistor R2, and then flows into the negative electrode after passing through the resistor R3 and switch T2, and flows into the negative electrode after passing through the resistor R1 and switch T4; when switches T3, T4, and T5 are turned on, R2 and R3 are connected in parallel, and the current flows out from the positive electrode, flows through the resistors R and R3 at the same time, and then flows through the resistor R1 and switch T4, and finally flows into the negative electrode; when switches T4, T5, and T6 are turned on, R1 and R2 are connected in parallel, and the current flows out from the positive electrode, flows through the resistor R3, and then flows into the negative electrode after passing through the resistor R1 and switch T4, and flows into the negative electrode after passing through the resistor R2 and switch T6.

2. A leveling device with energy recovery function according to claim 1, characterized in that: The power generation part of the energy recovery device comprises a power generation device housing (21), an impeller (22), a frame (23), a speed increasing gearbox (25), a brake (26), and a generator (27); the impeller (22) is mounted on the power generation device housing (21) via a bearing (24); the power generation device housing (21) is mounted at the center of a side of a "cross" on the frame (23); the generator (27) is mounted inside the power generation device housing (21) and is connected to the impeller (22) via the brake (26) and the speed increasing gearbox (25).

3. The leveling device with energy recovery function according to claim 1, characterized in that: The variable frequency power supply (11) is packaged separately and arranged above the outer side of the chiller (12).

4. The leveling device with energy recovery function according to claim 1, characterized in that: The embedded system inside the variable frequency power supply (11) controls the charging process and the discharging process of the battery (29) of the energy recovery device in the following manner: when the battery (29) of the energy recovery device has sufficient power, it directly supplies power to the mobile heating trolley (13) of the leveling machine (10); when the power is insufficient, the embedded system inside the variable frequency power supply (11) of the leveling machine directly supplies power to the mobile heating trolley (13) of the leveling machine (10).

5. A leveling method with energy recovery function, characterized in that: Using the leveling device according to any one of claims 1 to 4, the method comprises the following steps: Step 1: Connect the power supply, start the leveling machine (10), rotate the knob of the variable frequency power supply (11), and turn on the variable frequency power supply (11); Step 2: Press the button on the variable frequency power supply (11) to start the chiller (12); Step 3: Push the leveling machine (10) to the area where work is required, start the heating function, and transmit the high-frequency alternating current to the variable frequency power supply through the transmission line. After the current is frequency-converted, it is transmitted to the mobile heating trolley (13). The mobile heating trolley (13) performs leveling operations through the principle of electromagnetic induction heating; Step 4: The chiller (12) starts to work, and the temperature emitted by the variable frequency power supply (11) of the leveling machine (10) and the mobile heating trolley (13) is transferred to the refrigerant through water circulation in the evaporator. After the refrigerant releases heat in the condenser, it returns to the evaporator, completing the refrigerant circulation and the entire heat dissipation process; Step 5: The energy recovery device starts to collect wind energy generated by the chiller (12) during the heat dissipation process, converts it into three-phase alternating current through the generator (27), converts it into direct current through the rectifier (28), and stores it in the battery (29); Step 6: After the weld is leveled, the mobile heating trolley (13) moves to the next area to perform leveling work; when the battery (29) has low power, the embedded system-on-chip directly supplies power through the variable frequency power supply (11) to allow the mobile heating trolley (13) to work normally; when the battery (29) has sufficient power, the embedded system-on-chip controls the energy recovery device to provide power for the mobile heating trolley (13); Step 7: When the leveling work of the entire area is completed, rotate the knob on the variable frequency power supply (11) to disconnect the power supply, turn off the entire device, and drain the water in the chiller (12).

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