A traction converter for electric wheel vehicles used in mines

Abstract

The utility model discloses a traction converter for an electric wheel vehicle for mining, comprising a cabinet and a mounting frame arranged inside the cabinet, wherein the mounting frame divides the interior of the cabinet into four mounting cavities, wherein two mounting cavities at the bottom are both equipped with inverter modules, one mounting cavity at the top is equipped with a rectifier module, and the other mounting cavity at the top is equipped with a control module; radiators are all installed at the rear of the inverter module, the rectifier module and the control module; a heat dissipation duct is provided on the cabinet, and the heat dissipation duct is located between adjacent radiators; a cabinet door is rotatably mounted on the cabinet, and the cabinet door covers the four mounting cavities when closed; the utility model solves the problem that the internal module arrangement of the existing traction converter generates heat accumulation and poor heat dissipation, and the internal operation is relatively cumbersome due to the independent opening and closing of multiple cabinet doors.

Description

Technical Field

[0001] The utility model relates to the technical field of mining equipment, in particular to a traction converter for a mining electric wheel vehicle. Background Art

[0002] The traction inverter is like the "heart" of the electric wheel dump truck for mining. It mainly controls the power output. Its performance directly affects the driving of the electric wheel mining truck. The working principle of the mining traction inverter is that the diesel engine drives the traction generator to rotate through the mechanical coupling. The generator converts the mechanical energy into three-phase AC power and transmits it to the traction inverter. The traction inverter rectifier unit rectifies the AC power into DC power. The inverter unit converts the DC power into VVVF AC power and then drives the traction motor. The traction motor transmits the torque to the wheels through the planetary gear to achieve speed control of the dump truck. The traction inverter of the electric wheel dump truck can be divided into two types according to the electric transmission mode: AC-DC transmission and AC-DC-AC transmission. According to the number of drive shafts, it can be divided into two-wheel drive, four-wheel drive, six-wheel drive and even eight-wheel drive transmission systems. The frequency conversion speed regulation function of the AC-DC-AC transmission system can smoothly control the driving speed of the whole vehicle. The AC-DC-AC transmission system has stable operation, high reliability and good controllability. It is the most widely used electric transmission technology at present.

[0003] The existing traction inverter is internally provided with a rectifier module and multiple inverter modules. After the separate arrangement, a separate cabinet door is provided for each module. Each cabinet door needs to be opened independently for internal operations, resulting in a small space available for internal assembly. In addition, the internal module arrangement leads to high internal heat and poor heat dissipation effect. Utility Model Content

[0004] 1. Technical issues

[0005] The utility model aims to provide a traction inverter for an electric wheel vehicle for mining, which solves the problems that the internal module arrangement of the existing traction inverter generates heat accumulation and poor heat dissipation, and the independent opening and closing of multiple cabinet doors causes cumbersome internal operation.

[0006] (II) Technical solution

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A traction converter for an electric wheel vehicle for mining, comprising a cabinet and a mounting frame arranged inside the cabinet, wherein the mounting frame divides the interior of the cabinet into four mounting cavities, wherein two mounting cavities at the bottom are both equipped with inverter modules, one mounting cavity at the top is equipped with a rectifier module, and another mounting cavity at the top is equipped with a control module; a radiator is installed at the rear of the inverter module, the rectifier module and the control module;

[0009] The cabinet body is provided with a heat dissipation duct, and the heat dissipation duct is located between adjacent radiators; a cabinet door is rotatably mounted on the cabinet body, and the cabinet door covers the four installation cavities when closed.

[0010] Preferably, the heat dissipation air duct includes an air inlet hood arranged on the top of the cabinet and a guide channel passing through the interior of the cabinet and arranged longitudinally, and an air outlet channel located on the back of the cabinet is provided at the bottom of the cabinet, and the air inlet hood, the guide channel and the air outlet channel are connected in sequence; inclined air guide plates are provided at the corners of the guide channel and the corners of the air outlet channel.

[0011] Preferably, grilles are provided at the inlet of the air inlet cover and the outlet of the air outlet channel.

[0012] Preferably, a lamp rack and indicator lights installed at intervals on the lamp rack are provided in the installation cavity for installing the control module; a light-transmitting window corresponding to the indicator lights is opened on the cabinet door, and a light-transmitting plate is installed on the light-transmitting window.

[0013] Preferably, a circular groove corresponding to the indicator light is provided on the light-transmitting plate.

[0014] Preferably, the cabinet is provided with a control input interface group arranged corresponding to the installation cavity for installing the control module.

[0015] Preferably, a wire binding rack is installed on the cabinet and is located below the input interface group, and the wire binding rack includes a plurality of clamps.

[0016] Preferably, a plurality of power input interfaces are provided on the back of the cabinet.

[0017] Preferably, a wiring port located above the power input interface is provided on the back of the cabinet, and a sealing door is provided on the upper cover of the wiring port.

[0018] Preferably, a mounting block is provided at the bottom corner of the cabinet, and a hanging ring is provided at the top corner of the cabinet.

[0019] (III) Beneficial effects

[0020] The internal modules are distributed and installed through four installation cavities. The two inverter modules that generate more heat are placed in the installation cavity at the bottom of the cabinet, while the inverter module and control module that generate less heat are placed in the installation cavity at the top of the cabinet. The cold air introduced through the heat dissipation duct can ensure that the radiator at the inverter module forms good heat dissipation, thereby improving the heat dissipation effect.

[0021] At the same time, one cabinet door is used to cover the four installation cavities at the same time, so that when performing installation operations inside, there is a larger operating space when the cabinet door is opened, which effectively improves the current situation in the prior art where multiple independent cabinet doors are opened separately for operation and the space is small. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of an embodiment of the utility model;

[0023] Figure 2 This is a schematic diagram of the structure of the utility model without the cabinet door

[0024] Figure 3 This is a first cross-sectional structural schematic diagram of an embodiment of the utility model;

[0025] Figure 4 It is a second cross-sectional structural schematic diagram of an embodiment of the utility model;

[0026] Figure 5 for Figure 4 A local enlarged structural diagram of the part;

[0027] Figure 6 It is a side view structural schematic diagram of an embodiment of the utility model;

[0028] Figure 7 It is a rear view structural schematic diagram of an embodiment of the utility model;

[0029] exist Figures 1 to 7 In the figure, the corresponding relationship between the component names or lines and the figure numbers is as follows:

[0030] Cabinet 1, mounting frame 2, mounting cavity 3, inverter module 4, rectifier module 5, control module 6, radiator 7, heat dissipation duct 8, air inlet cover 81, guide channel 82, air outlet channel 83, guide plate 84, grille 85, cabinet door 9, lamp holder 10, indicator light 11, light-transmitting window 12, light-transmitting plate 13, circular groove 130, control input interface group 14, wire binding rack 15, power input interface 16, sealing door 17, mounting block 18, and lifting ring 19. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0032] See also Figure 1-Figure 7As shown in the figure, in the embodiment of the present utility model, a traction converter for a mine electric wheel vehicle is proposed. The internal modules for rectification, voltage transformation, current transformation, etc. are all prior arts. In this embodiment, only the utilization mode of the internal space, the simplicity of operation, and the corresponding device arrangement are improved. Specifically, it includes a cabinet 1 and a mounting rack 2 arranged inside the cabinet 1. The mounting rack 2 divides the interior of the cabinet 1 into four mounting cavities 3. In the two mounting cavities 3 at the bottom, inverter modules 4 are installed. In one of the mounting cavities 3 at the top, a rectifier module 5 is installed. In the other mounting cavity 3 at the top, a control module 6 is installed. The structure of the mounting rack 2 is in the shape of a "field", which is convenient for isolating and installing the integrated modules. Specifically during installation, the two inverter modules 4 with relatively large heat generation are arranged in the two mounting cavities 3 at the bottom of the cabinet 1, while the rectifier module 5 and the control module 6 with relatively small heat generation are arranged in the two mounting cavities 3 at the top of the cabinet 1. Thus, when internal heat dissipation is carried out, the incoming cold air first flows through the parts with relatively small heat generation and then reaches the parts with relatively large heat generation, thereby avoiding the situation of heat accumulation inside. To improve the heat dissipation and heat exchange efficiency, radiators 7 are installed behind the inverter modules 4, the rectifier module 5, and the control module 6. The heat exchange efficiency is improved through the radiators 7, and a mature fin structure can be adopted.

[0033] Meanwhile, a heat dissipation air duct 8 is provided on the cabinet 1. The heat dissipation air duct 8 is located between adjacent radiators 7. The heat dissipation air duct 8 is used to introduce external cold air and discharge the hot air formed inside after heat exchange, so that the internal heat can be quickly dissipated.

[0034] Specifically, a cabinet door 9 is rotatably installed on the cabinet 1. When the cabinet door 9 is closed, it covers the four mounting cavities 3. In this embodiment, only one cabinet door 9 is used to cover the four mounting cavities 3. Thus, when assembling the interior, directly opening the cabinet door 9 can expose all four mounting cavities 3, facilitating the operation space during assembly. In the prior art, each mounting cavity 3 is closed by a separate door. When specifically installing the interior, it is limited by the opening state of the cabinet door 9, resulting in a smaller operation space and being inconvenient for operation. This embodiment is precisely improved based on this to a larger-area cabinet door 9, which is closed simultaneously and is convenient for operation without any obstruction.

[0035] Specifically, the heat dissipation duct 8 includes an air inlet hood 81 arranged at the top of the cabinet 1 and a guide channel 82 passing through the interior of the cabinet 1 and arranged longitudinally. The bottom of the cabinet 1 is provided with an air outlet channel 83 located on the back of the cabinet 1. The air inlet hood 81, the guide channel 82 and the air outlet channel 83 are connected in sequence. The air inlet hood 81 is set at the top of the cabinet 1, and the air outlet channel 83 is set at the bottom of the cabinet 1. The cold air entering therefrom flows from top to bottom, and the gravity of the cold air can be used to automatically flow downward to accelerate the flow rate and improve the heat exchange efficiency. The guide channel 82 mainly exchanges heat with the radiator 7 at the corresponding position, and quickly transports the hot air to the air outlet channel 83. In order to increase the heat exchange contact length, the guide channel 82 and the air outlet channel 83 are basically arranged vertically. The flowing air at the corners generates resistance and backflow. In order to improve the air flow rate and avoid backflow, inclined air guide plates are provided at the corners of the guide channel 82 and the air outlet channel 83. The inclination direction of the air guide plates is in the direction of air flow, which can speed up the air flow and prevent backflow at the corners.

[0036] At the same time, in order to prevent small external animals and larger impurities from entering the heat dissipation air duct 8 and causing blockage, grilles 85 are provided at the entrance of the air inlet cover 81 and the exit of the air outlet channel 83.

[0037] In this embodiment, a cabinet door 9 is used for opening and closing, and the opening angle is large, but the internal indication status needs to be checked from the outside of the cabinet door 9, and it is necessary to avoid integrating circuits on the cabinet door 9 to avoid circuit breaks when opening and closing. Therefore, a method of not laying circuits on the cabinet door 9 is proposed. Specifically, a lamp holder 10 and an indicator light 11 installed at intervals on the lamp holder 10 are provided in the installation cavity 3 for installing the control module 6, and a light-transmitting window 12 corresponding to the indicator light 11 is provided on the cabinet door 9, and a light-transmitting plate 13 is installed on the light-transmitting window 12, through which the indicator light 11 is independently integrated inside, and the light-transmitting plate 13 transmits light to the indicator light 11. No circuits are laid on the cabinet door 9, and at the same time, the light-transmitting plate 13 is sealed with the light-transmitting window 12 and has a longer mating edge, thereby being able to meet the explosion-proof requirements.

[0038] At the same time, a circular groove 130 corresponding to the indicator light 11 is provided on the light-transmitting plate 13 , and the light of the indicator light 11 is focused by the circular groove 130 , so that the light status can be more clearly viewed from the outside.

[0039] Specifically, the cabinet 1 is provided with a control input interface group 14 arranged in the installation cavity 3 corresponding to the control module 6. The control input interface group 14 has multiple interfaces, such as a plug interface, a communication interface, etc., which are all centrally arranged on the cabinet 1 where the control module 6 is installed.

[0040] At the same time, a wire binding rack 15 is installed on the cabinet 1 below the input interface group. The wire binding rack 15 includes a plurality of clamps. The cables connected to the interfaces are clamped by the wire binding rack 15 to achieve reliable binding and prevent the cables from being laid in a messy manner.

[0041] Specifically, a plurality of power input interfaces 16 are provided at the back of the cabinet 1 , so as to facilitate the arrangement of input power lines at the back of the cabinet 1 .

[0042] At the same time, a wiring port located above the power input interface 16 is provided on the back of the cabinet 1, and a sealing door 17 is provided on the upper cover of the wiring port. The sealing door 17 is used to be opened for easy operation when wiring is performed on the back of the cabinet 1. After the various modules inside the entire cabinet 1 are installed, all wiring cannot be satisfied from the front of the cabinet 1 alone, especially the power input part.

[0043] Specifically, a mounting block 18 is provided at the bottom corner of the cabinet 1, and a lifting ring 19 is provided at the top corner of the cabinet 1. The mounting block 18 is used to fix the entire cabinet 1 after installation. At the same time, the lifting ring 19 is provided to facilitate lifting and transportation of the entire cabinet 1.

[0044] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "inner", "outer", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0046] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A traction converter for an electric wheel vehicle for mining, characterized in that: The cabinet comprises a cabinet and a mounting frame arranged inside the cabinet, wherein the mounting frame divides the interior of the cabinet into four mounting cavities, wherein the two mounting cavities at the bottom are both equipped with inverter modules, the one mounting cavity at the top is equipped with a rectifier module, and the other mounting cavity at the top is equipped with a control module; The inverter module, the rectifier module and the control module are all equipped with a radiator at the rear; The cabinet is provided with a heat dissipation duct, and the heat dissipation duct is located between adjacent radiators; A cabinet door is rotatably mounted on the cabinet body, and when the cabinet door is closed, it covers the four mounting cavities.

2. The traction converter for electric wheeled vehicles for mining according to claim 1, characterized in that: The heat dissipation air duct includes an air inlet cover arranged on the top of the cabinet and a guide channel passing through the interior of the cabinet and arranged longitudinally, and an air outlet channel located at the back of the cabinet is provided at the bottom of the cabinet, and the air inlet cover, the guide channel and the air outlet channel are connected in sequence; Inclined wind guide plates are provided at the corners of the guide channel and the corners of the air outlet channel.

3. The traction converter for electric wheeled vehicles for mining according to claim 2, characterized in that: Grilles are provided at the inlet of the air inlet cover and the outlet of the air outlet channel.

4. A traction converter for an electric wheel vehicle for mining according to any one of claims 1 to 3, characterized in that: A lamp rack and indicator lights installed on the lamp rack at intervals are provided in the installation cavity for installing the control module; The cabinet door is provided with a light-transmitting window corresponding to the indicator light, and a light-transmitting plate is installed on the light-transmitting window.

5. The traction converter for electric wheeled vehicles for mining according to claim 4, characterized in that: The light-transmitting plate is provided with a circular groove corresponding to the indicator light.

6. The traction converter for electric wheeled vehicles for mining according to claim 4, characterized in that: The cabinet is provided with a control input interface group arranged corresponding to the installation cavity for installing the control module.

7. The traction converter for electric wheeled vehicles for mining according to claim 6, characterized in that: A wire binding rack located below the input interface group is installed on the cabinet, and the wire binding rack includes a plurality of clamps.

8. The traction converter for electric wheeled vehicles for mining according to claim 4, characterized in that: The back of the cabinet is provided with a plurality of power input interfaces.

9. The traction converter for electric wheeled vehicles for mining according to claim 8, characterized in that: The back of the cabinet is provided with a wiring port located above the power input interface, and the wiring port upper cover is provided with a sealing door.

10. The traction converter for electric wheeled vehicles for mining according to claim 1, characterized in that: A mounting block is provided at the bottom corner of the cabinet, and a hanging ring is provided at the top corner of the cabinet.

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