Mine truck traction converter

Abstract

The embodiment of the utility model relates to the technical field of converters, and discloses a traction converter of a mine truck. The mine truck traction converter comprises a cabinet body, and a power module, a DCU control unit, an electrical connection system, a heat dissipation system and a heating system which are arranged in the cabinet body. According to the traction converter for the mine truck, the problem that internal devices are easy to fail and cannot work normally in an extremely cold environment of-60 DEG C is solved, so that the effect of relieving restriction on the application range of the converter is achieved.

Description

TECHNICAL FIELD

[0001] The embodiment of the utility model relates to the technical field of converter, especially relates to a mine truck traction converter. BACKGROUND

[0002] In the field of mine truck, traction converter as the heart of mine car, controls the power output of whole car, and its performance directly determines the performance of electric wheel mine truck. Usually in the extremely cold environment of -60 DEG C, the performance and requirement of mine electric wheel dump truck are more and more strict, however, most industrial electronic devices can only support working in the environment above -40 DEG C, and the internal devices are prone to failure in the extremely cold environment of -60 DEG C, resulting in the problem of unable to work normally, even some devices appear permanent damage, which seriously restricts the application range of converter. CONTENT OF UTILITY MODEL

[0003] The embodiment of the utility model relates to the technical field of converter, especially relates to a mine truck traction converter.

[0004] To solve the above technical problems, at least one embodiment of the present application provides a mine truck traction converter, which comprises a cabinet body and a power module, a DCU control unit, an electrical connection system, a heat dissipation system and a heating system arranged in the cabinet body.

[0005] The heating system comprises a first heating system and / or a second heating system arranged in the cabinet body.

[0006] The first heating system is used to start heating when the mine truck is running or on standby.

[0007] The second heating system is used to start heating when the mine truck is stopped or the converter is stored.

[0008] The mine truck traction converter provided by the embodiment of the present application, compared with the prior art, adopts the heating system arranged in the cabinet body, and can work, standby, stop and store normally in the extremely cold environment of -60 DEG C, so that the problem of internal devices prone to failure and unable to work normally in the extremely cold environment is solved.

[0009] In addition, the DCU control unit is connected with the heating system to control the temperature in the cabinet body.

[0010] In addition, the first heating system is a DC24V heating system, which comprises a plurality of silicone rubber heaters and / or fan heaters, contactors, temperature relays and heating control switches.

[0011] In addition, the temperature relay in the first heating system is arranged at a low-temperature position in the cabinet.

[0012] In addition, the plurality of silicone rubber heaters and / or fan heaters are distributedly arranged around the power modules in the cabinet.

[0013] The plurality of silicone rubber heaters and / or fan heaters are centrally arranged in a heating channel in the cabinet, and the heating channel is provided with air holes at positions passing through the power modules.

[0014] In addition, the first heating system further comprises a fuse for overcurrent protection of the plurality of silicone rubber heaters and / or fan heaters.

[0015] In addition, the second heating system is an AC220V heating system, comprising a plurality of fan heaters, a contactor, a temperature relay and a heating control switch.

[0016] In addition, the second heating system further comprises a status indicator lamp for indicating the working state of the second heating system.

[0017] In addition, the second heating system further comprises a fuse for overcurrent protection of the plurality of fan heaters. BRIEF DESCRIPTION OF DRAWINGS

[0018] One or more embodiments are illustrated by way of example in the figures that are part of this document and which illustrate key principles of the embodiments. The drawings are not to scale and are provided merely for explanatory purposes. The same reference numbers in different drawings identify the same components unless otherwise specified.

[0019] Figure 1 is a schematic diagram of a traction converter structure in the prior art;

[0020] Figure 2 is a structural diagram of a mine truck traction converter with a distributedly arranged first heating system according to an embodiment of the present application;

[0021] Figure 3 is a structural diagram of a mine truck traction converter with a second heating system according to an embodiment of the present application;

[0022] Figure 4 is a schematic diagram of a DC24V heating system main circuit according to an embodiment of the present application;

[0023] Figure 5It is a DC 24V heating system control circuit schematic diagram provided according to an embodiment mode of the utility model;

[0024] Figure 6 It is a structure diagram of a mine truck traction converter with a centralized arrangement first heating system provided according to an embodiment mode of the utility model;

[0025] Figure 7 It is an AC 220V heating system main control circuit schematic diagram provided according to an embodiment mode of the utility model. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the various embodiments of the utility model will be described in detail below with reference to the drawings. However, those skilled in the art can understand that in the various embodiments of the utility model, many technical details are proposed in order to make the reader better understand the utility model. However, even without these technical details and various changes and modifications based on the following embodiments, the technical scheme claimed in the utility model can be implemented.

[0027] In order to facilitate understanding of the embodiments of the present application, the related content about the mine truck traction converter is introduced first.

[0028] With the continuous expansion of the scale of large open-pit mines at home and abroad, the geographical environment involved by open-pit mines is becoming wider and wider, and the market demand for mine electric wheel dump trucks is increasing greatly, which also brings higher work efficiency, safety and economic benefits to the owners. The mine truck works in open-pit, the road surface of the mine is rugged, the vibration impact is large, the dust is large, the altitude of some mines is even more than 5000m, the temperature of some high-temperature environment reaches 50℃, while the temperature of some extremely cold environment abroad reaches-60℃, the average temperature of 2 / 3 of the year is-39℃, which puts forward very high challenges to the insulation performance, sealing IP level, vibration resistance, high and low temperature performance and other performances of the converter. For example Figure 1 The schematic diagram of the traction converter structure in the prior art is shown in the figure, most of the industrial electronic devices in the traction converter under the prior art can only support working in an environment above-40℃, especially in an extremely cold environment of-60℃, internal devices are prone to failure, resulting in failure to work normally, and even some devices are permanently damaged, which seriously restricts the application range of the converter.

[0029] And the related prior art disclosed in the patent:

[0030] Patent publication number CN102437716A, invention title: Low-temperature wind turbine converter water cooling device and control system. The converter described in this patent, unlike a mine car converter, is a water-cooling system used in wind power generation to enable equipment to operate in environments above -40°C. It cannot support the operation of components outside the cabinet water cooling system in extremely cold environments of -60°C, nor can it support the operation of air-cooled converters in extremely cold environments of -60°C.

[0031] Patent publication number CN214379611U, invention title: Circuit breaker auxiliary temperature control device for the grid-side converter of wind turbines in Northern Wind Power Plant. The converter described in this patent is used in the wind power generation field and has a temperature control range of -25°C to 70°C. It consists of a cooling fan assembly, a heating device, and a temperature control system. However, a single heating device has high heating power and uneven temperature.

[0032] The embodiment of the utility model relates to a traction converter for a mining vehicle, comprising a cabinet and a power module, a DCU control unit, an electrical connection system, a heat dissipation system and a heating system arranged in the cabinet;

[0033] The heating system includes a first heating system and / or a second heating system arranged in the cabinet;

[0034] The first heating system is used to start heating when the mining vehicle is running or on standby;

[0035] The second heating system is used to start heating when the mining vehicle is stopped or the converter is stored.

[0036] Compared with the prior art, the implementation method of the present invention adopts a heating system arranged in the cabinet. Since it meets the requirements of normal operation, standby, shutdown and storage in an extremely cold environment of -60°C, it solves the problem that internal components are prone to malfunction and cannot work normally in an extremely cold environment.

[0037] The following is a detailed description of the implementation details of the embodiment of the present invention. The following content is only for the convenience of understanding the implementation details and is not necessary for the implementation of this solution.

[0038] Example 1

[0039] The embodiment of the present utility model provides a mining vehicle traction converter, such as Figure 2 As shown, combined with Figure 3 , including: a cabinet 1 and a power module 2, a DCU control unit 3, an electrical connection system 4, a heat dissipation system 5 and a heating system arranged in the cabinet 1.

[0040] Specifically, the plate member in contact with the outside of the cabinet 1 is made of stainless steel, which meets the normal working condition at-60℃ temperature. The power module 2 in the cabinet 1 further comprises auxiliary variable modules and DCDC modules, and the number of modules can be adjusted according to requirements. The DCU control unit 3 is used to connect the heat dissipation system 5 and the heating system 6 through the electrical connection system 4.

[0041] The heating system comprises a first heating system 601 and / or a second heating system 602 arranged in the cabinet;

[0042] The first heating system 601 is used to start heating when the mine truck is running or on standby;

[0043] The second heating system 602 is used to start heating when the mine truck is stopped or the converter is stored.

[0044] Specifically, when the external environment temperature is below-40℃ or other extremely cold conditions, the mine electric wheel self-unloading truck uses the on-board DC24V heating system (first heating system 601) to heat the air in the cabinet when running or on standby. Only when the diesel engine of the mine electric wheel self-unloading truck is working and the auxiliary generator is running to charge the battery, the DC24V heating system in the converter can be started. When the mine electric wheel self-unloading truck is stopped or the converter is stored, the converter is not powered on, and it is not possible to heat for a long time by using the on-board DC24V battery power supply. Otherwise, the battery is easy to feed power, and the AC220V heating system (second heating system 602) needs to be used to heat the air in the cabinet.

[0045] The mine truck traction converter provided by the embodiment adopts a heating system arranged in the cabinet, which can meet the normal working, standby, stopping and storage conditions in-60℃ extremely cold environment, and solves the problem that the internal components are prone to failure in extremely cold environment, thereby ensuring normal working. In addition, the mine truck traction converter can also achieve the advantage that the on-board product can work and store in an environment above-60℃.

[0046] Example Two

[0047] In some embodiments, the DCU control unit 3 connects the heating system to control the temperature in the cabinet 1.

[0048] Specifically, as Figure 2 , and in combination with Figure 3As shown, the heating system consists of a DC24V heating system (first heating system 601) and an AC220V heating system (second heating system 602). The DC24V heating system is powered by a vehicle-mounted DC24V battery, and the AC220V heating system is powered by an external AC220V power supply. The DC24V heating system and the AC220V heating system operate independently of each other, and the air temperature inside the cabinet 1 is controlled by the DCU control unit 3 in the cabinet.

[0049] Example 3

[0050] In some embodiments, the first heating system 601 is a DC24V heating system, including several silicone rubber heaters and / or fan heaters, contactors, temperature relays and heating control switches.

[0051] Specifically, this embodiment is a limitation on the structure of the first heating system 601. Figure 4 The DC24V heating system main circuit diagram shown in FIG. 1 is composed of several silicone rubber heaters H11 to H16, fuses F11 to F12, contactors KM11 to KM12, temperature relays J11 to J12, and Figure 5 The DC24V heating system control circuit diagram shown is composed of heating control switch K11. Figure 4 and Figure 5 The silicone rubber heaters H11-H16 receive the diesel engine start signal via the heating control switch K11, temperature relays J11-J12, and the DCU control unit 3 (composed of the DCU, DCU-s1, and DCU-s1). This control simultaneously switches the heating contactors KM11-KM12 on and off, thereby controlling the inverter heating performance of each heater H11-H16. Simultaneously, the heating control switch K11 and temperature relays J11-J12 provide feedback to the DCU for data collection. If a fault occurs in the DCU control unit 3, protection can still be provided based on the threshold temperature of the temperature relays J11-J12. The DCU control unit 3 can also monitor the status of the temperature relays J11-J12 in real time.

[0052] In some embodiments, the temperature relays J11 - J12 in the first heating system 601 are arranged at a low temperature area in the cabinet 1 .

[0053] Specifically, the temperature relays J11-J12 are arranged at locations with lower temperatures in the cabinet. Figure 5, temperature relay J11~J12 and contactor KM11~KM12 one-to-one correspondence, temperature relay J11~J12 below the action temperature when closed, each heater H11~H16 start heating, ensure the cabinet air temperature control in -40 ℃ above. To avoid overheating in the cabinet, temperature relay J11~J12 when the return temperature is disconnected, each heater H11~H16 stop heating. Action temperature should be greater than -40 ℃, the return temperature should be lower than the maximum temperature but higher than the action temperature certain value, to avoid temperature relay J11~J12 frequently open and close action.

[0054] In some embodiments, the several silicon rubber heaters and / or fan heaters are distributed around the power module 2 in the cabinet 1;

[0055] Specifically, the cabinet silicon rubber heater H11~H16 power and quantity is calculated according to the cabinet device heat power, heat dissipation system heat and converter to the outside of the convection and radiation heat dissipation, through the bolt fastening distributed in the cabinet near the device needs to be heated, such as Figure 2 .

[0056] The silicon rubber heater H11~H16 is divided into groups according to the position and temperature of the heater in the cabinet, and is controlled by group (this example is divided into 2 groups). By controlling the working quantity of silicon rubber heater H11~H16, the air temperature in the cabinet is more evenly distributed.

[0057] The silicon rubber heater H11~H16 is fastened on the cabinet 1 by bolts, and can also be directly pasted on the cabinet 1 near the power module 2 by pasting film. In addition to using silicon rubber heater, DC24V heater can also use fan heater. The heater can be controlled by multiple groups according to the temperature distribution and the fineness of adjustment, or can be controlled individually.

[0058] And / or,

[0059] The several silicon rubber heaters and / or fan heaters are centrally arranged in the heating channel in the cabinet 1; the heating channel 8 is provided with air holes 9 at the position of the power module 2.

[0060] Specifically, in addition to the multiple number of heaters distributed according to the temperature distribution (such as Figure 2 and Figure 3 ), the centrally arranged heater 7 (such as Figure 6 ) can also be selected. The heating channel 8 composed of the beams in the cabinet is provided with air holes 9 at the position needing heating, and the heated hot air is delivered to each position needing heating in the cabinet through the heating channel 8. This way can reduce the number of heaters and the temperature heating is more uniform.

[0061] In some embodiments, the first heating system 601 further includes fuses F11 to F12 for providing overcurrent protection to the plurality of silicone rubber heaters and / or fan heaters.

[0062] Specifically, the fuses F11 - F12 are connected in series in groups at the front end of the heater to provide overcurrent protection when a heater failure occurs.

[0063] Example 4

[0064] In some embodiments, the second heating system 602 is an AC220V heating system, including several fan heaters H20-H23, a contactor KM21, temperature relays J21-J22 and a heating control switch K21.

[0065] Specifically, this embodiment is a limitation on the structure of the second heating system 602. Figure 7 The AC220V heating system main control circuit shown in the figure consists of several compact high-power fan heaters H20~H23, fuse F21, contactor KM21, temperature relay J21, heating control switch K21, and status indicator light H1.

[0066] The AC220V heating system is similar to the DC24V heating system. The heaters are divided into multiple groups for group control. When the air temperature in the cabinet exceeds a certain threshold temperature, the Figure 7 Temperature relays J21-J22 correspond to contactors KM21-KM22. When the temperature relays J21-J22 fall below the operating temperature, they close, and heaters H20-H23 begin heating, ensuring the cabinet air temperature remains above -40°C. To prevent overheating, temperature relays J21-J22 open when the temperature exceeds the recovery temperature, and heaters H20-H23 stop heating. The operating temperature must be above -40°C, and the recovery temperature must be below the maximum temperature but above the operating temperature by a certain amount to prevent the temperature relays J21-J22 from opening and closing frequently.

[0067] In some embodiments, the plurality of fan heaters H20 - H23 are arranged at the cabinet door protrusions corresponding to the power module 2 ; and the temperature relays J21 - J22 are arranged at low temperature positions in the cabinet 1 .

[0068] Specifically, the plurality of fan heaters H20 to H23 in the second heating system 602 are compact high-power fan heaters H20 to H22. Due to the limited space in the cabinet, such as Figure 3As shown, bolt fastening is adopted on the cabinet door protrusion corresponding to the power module 2, and the heat of the heat generating body is blown to the inside of the cabinet 1 by the fan to heat the air in the cabinet. The temperature relays J21-J22 are arranged at a position with lower temperature in the cabinet. Because the heating power and position of the AC 220V heating system and the DC 24V heating system are different, the temperature distribution in the cabinet is also different, and the arrangement position of the temperature relays is also different.

[0069] In some embodiments, the second heating system 602 further comprises a state indicating lamp H1 for indicating the working state of the second heating system 602.

[0070] Specifically, the AC 220V heating system is connected in series with a state indicating lamp H1 on the contactors KM21 and KM22, and the working state of the heating system is viewed in real time, so as to solve the problem that the heating state of the converter cannot be viewed due to the failure of enabling the DCU control unit because the converter is not powered.

[0071] In some embodiments, the second heating system 602 further comprises a fuse F21 for overcurrent protection of the plurality of fan heaters H20-H23.

[0072] Specifically, the fuse F21 is connected in series at the front end of the heater, and overcurrent protection is performed when the heater fails.

[0073] It should be understood that the expressions "mechanism", "device", "component", etc. used in the present application are only a method for distinguishing different components, elements, parts, portions or assemblies of different levels. However, if other expressions can achieve the same purpose, the expressions can be replaced by other expressions.

[0074] Those skilled in the art can understand that the above embodiments are specific embodiments for implementing the present application, and in actual application, the technical features of the above embodiments can be combined arbitrarily. In order to make the description simple, all possible combinations of the technical features in the above embodiments are not described, however, as long as the combination of the technical features does not exist contradictory, it should be considered as the scope of the present application, and various changes can be made in form and details without departing from the spirit and scope of the present application.

Claims

1. A mine truck traction converter, characterized in that, The cabinet body and the power module, DCU control unit, electrical connection system, heat dissipation system and heating system arranged in the cabinet body; The heating system comprises a first heating system and / or a second heating system arranged in the cabinet body; The first heating system is used to start heating when the mine truck is running or on standby. The second heating system is used to start heating when the mine truck is parked or the converter is stored.

2. The mining truck traction converter according to claim 1, characterized in that, The DCU control unit is connected to the heating system to control the temperature in the cabinet body.

3. The mining truck traction converter according to claim 1, characterized in that, The first heating system is a DC24V heating system, which comprises a plurality of silicone rubber heaters and / or fan heaters, contactors, temperature relays and heating control switches.

4. The mining truck traction converter according to claim 3, characterized in that, The temperature relays in the first heating system are arranged at a low-temperature position in the cabinet body.

5. The mining truck traction converter according to claim 3, characterized in that, The plurality of silicone rubber heaters and / or fan heaters are distributed around the power module in the cabinet body; and / or, The plurality of silicone rubber heaters and / or fan heaters are centrally arranged in a heating channel in the cabinet body; the heating channel is provided with air holes at the position passing through the power module.

6. The mining truck traction converter according to claim 3, characterized in that, The first heating system further comprises: A fuse for overcurrent protection of the plurality of silicone rubber heaters and / or fan heaters.

7. The mining truck traction converter according to claim 1, characterized in that, The second heating system is an AC220V heating system, which comprises a plurality of fan heaters, contactors, temperature relays and heating control switches.

8. The mining truck traction converter according to claim 7, characterized in that, The plurality of fan heaters are arranged at the corresponding cabinet door protrusions of the power module; the temperature relays are arranged at a low-temperature position in the cabinet body.

9. The mining truck traction converter according to claim 7, characterized in that, The second heating system further comprises a status indicator light for indicating the working state of the second heating system.

10. The mining truck traction converter according to claim 7, characterized in that, The second heating system further comprises: A fuse for overcurrent protection of the plurality of fan heaters.

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