A mine monorail crane explosion-proof frequency conversion integrated machine

Abstract

This utility model discloses an explosion-proof frequency converter integrated machine for mining monorail hoists, comprising: a housing, on which a frequency converter chamber, a frequency converter wiring chamber, and a motor are disposed. The frequency converter chamber is located on the front of the housing, and inside the frequency converter chamber are a frequency converter driver and a copper busbar. The frequency converter driver drives the motor and controls its speed, while the copper busbar is used for interconnecting the electrical components within the frequency converter chamber. The frequency converter wiring chamber is located on the left side of the frequency converter chamber. This explosion-proof frequency converter integrated machine for mining monorail hoists integrates the frequency converter driver and the motor into one unit, shortening the power cable between them and reducing stray inductance. Simultaneously, the use of copper busbars instead of traditional cables reduces the risk of cable loosening due to motor vibration. Furthermore, a water-cooled plate simultaneously dissipates heat from both the frequency converter driver and the motor, simplifying the heat dissipation piping and improving heat dissipation efficiency, achieving the effects of small size, light weight, and stable operation.

Description

Technical Field

[0001] This utility model relates to the technical field of mining monorail drive equipment, specifically to a mining monorail explosion-proof frequency converter integrated machine. Background Technology

[0002] A monorail is an auxiliary transportation device suspended from the roof of a roadway. It uses a specially made I-beam rail as its running path and is fixed by anchor bolts, chains, or hydraulic systems. It features high mobility, large load capacity, and safety and reliability. It is mainly used for the hoisting and movement of equipment such as cables, emulsion hoses, and hydraulic supports in coal mine fully mechanized mining faces. It can reduce the intensity of manual operation and improve transportation efficiency.

[0003] However, existing monorail gantry cranes are driven by diesel generators, which suffer from problems such as high noise, severe pollution, and high carbon monoxide emissions. Furthermore, diesel engines are bulky and difficult to adapt to the confined spaces of mines. In recent years, with the trend towards electrification, battery-powered monorail gantry cranes have gradually become more common. However, existing variable frequency drive equipment is usually a separate design, with complex cable connections, low heat dissipation efficiency, and redundant explosion-proof structures leading to heavy weight and inconvenient maintenance. Therefore, there is an urgent need for a highly integrated, water-cooled, and compact explosion-proof variable frequency drive unit for monorail gantry cranes. Utility Model Content

[0004] To overcome the aforementioned deficiencies of the prior art, this utility model provides a mine monorail crane explosion-proof frequency converter integrated machine, which integrates the frequency converter driver and the motor into one unit, shortens the power cable between the two, reduces stray inductance, and uses copper busbars to replace traditional cables, reducing the risk of cable loosening caused by motor vibration. Furthermore, a water-cooling plate is used to dissipate heat for both the frequency converter driver and the motor, simplifying the heat dissipation pipeline and improving heat dissipation efficiency, achieving the effects of small size, light weight, and stable operation, thereby solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] An explosion-proof variable frequency drive (VFD) integrated machine for mining monorail hoists includes: a housing, on which a VFD chamber, a VFD wiring chamber, and a motor are disposed. The VFD chamber is located on the front of the housing, and a VFD driver and a copper busbar are disposed inside the VFD chamber. The VFD driver is used to drive the motor and control the motor speed, and the copper busbar is used for interconnection of electrical components within the VFD chamber. The VFD wiring chamber is located on the left side of the VFD chamber and is connected to DC cable input and output control cables to provide power to the VFD driver. The motor is vertically mounted on the explosion-proof surface at the back of the VFD chamber. An end cover wiring chamber is disposed below the end cover of the motor and is used to connect the motor windings to the copper busbar. The VFD chamber, the VFD wiring chamber, and the end cover wiring chamber are interconnected through explosion-proof through holes. A water-cooling heat dissipation mechanism is disposed on the back of the VFD chamber, on the side of the motor, for heat dissipation of the motor and the VFD driver.

[0007] As a further embodiment of this utility model: the water-cooled heat dissipation mechanism includes a water-cooled heat dissipation plate, which is installed on the explosion-proof surface at the back of the inverter chamber. The internal water channels of the water-cooled heat dissipation plate are connected to the heat dissipation pipes of the motor and the inverter driver. The heat dissipation plate inlet and outlet nozzles on the water-cooled heat dissipation plate and the motor heat dissipation inlet and outlet nozzles on the motor are both located on the right side of the motor. The heat dissipation plate inlet and outlet nozzles and the motor heat dissipation inlet and outlet nozzles are connected by external pipes.

[0008] As a further improvement of this utility model: a power transmission shaft is provided above the motor, and the power transmission shaft is vertically installed at the output end of the motor to transmit power to the monorail transmission mechanism.

[0009] As a further improvement of this utility model, a cable introduction device is provided at the end of the frequency converter wiring chamber. The cable introduction device introduces DC cable input and output control cables into the frequency converter wiring chamber, and the cable introduction direction is perpendicular to the power transmission shaft.

[0010] As a further improvement of this utility model, the frequency converter is provided with a DC positive input terminal, a DC negative input terminal and a communication terminal. The DC positive input terminal and the DC negative input terminal are connected to the DC cable input and output control cable to receive DC current and provide power to the frequency converter. The communication terminal is used to transmit control signals to realize communication between the frequency converter and the external control system.

[0011] As a further improvement of this utility model: a maintenance door that opens from left to right is provided on the front of the housing. The maintenance door is hinged to the outer wall of the housing and is used to open and close the inverter chamber.

[0012] As a further improvement of this utility model: the back explosion-proof surface of the inverter chamber is provided with an L-shaped sheet metal support leg, and the motor is mounted on the L-shaped sheet metal support leg by bolts.

[0013] Compared with the prior art, the advantages of this utility model are:

[0014] By integrating the inverter chamber, inverter wiring chamber, and motor onto the housing, the inverter driver and motor can be combined into the housing, shortening the power cable between them and reducing stray inductance. At the same time, using copper busbars instead of traditional cables reduces the risk of cable loosening caused by motor vibration. Water cooling plates simultaneously dissipate heat from both the inverter driver and motor, simplifying the heat dissipation piping and improving heat dissipation efficiency, achieving the effects of small size, light weight, and stable operation. Furthermore, the maintenance door, which is hinged and opened from left to right on the front of the housing, allows direct access to the inverter chamber, enabling maintenance and repair of the inverter driver and cable connections within the inverter chamber. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a three-dimensional schematic diagram of an explosion-proof frequency conversion integrated machine for mining monorail cranes according to an embodiment of the present invention;

[0017] Figure 2 This is a schematic diagram of the internal structure of a frequency converter chamber according to an embodiment of the present invention;

[0018] Figure 3 This is a schematic diagram of the installation of a water-cooled plate according to an embodiment of the present invention;

[0019] Figure 4 This is a schematic diagram showing the positional distribution of the hinge and cable introduction device according to an embodiment of the present invention;

[0020] Figure 5 This is a schematic diagram showing the positional distribution of the inverter cooling water inlet and the motor cooling water inlet according to an embodiment of the present invention.

[0021] In the diagram: 1. Inverter chamber; 2. Inverter wiring chamber; 3. Motor; 4. End cover wiring chamber; 5. DC positive input terminal; 6. DC negative input terminal; 7. Communication terminal; 8. Inverter driver; 9. Wiring busbar; 10. Power transmission shaft; 11. Water-cooled heat sink; 12. Hinge; 13. Cable entry device; 14. Heat sink inlet and outlet nozzles; 15. Motor heat sink inlet and outlet nozzles. Detailed Implementation

[0022] Combination Figures 1-5 As shown in this embodiment, a mine monorail crane explosion-proof frequency converter integrated machine includes: a housing, on which a frequency converter chamber 1, a frequency converter wiring chamber 2, and a motor 3 are disposed. The frequency converter chamber 1 is disposed on the front of the housing. Inside the frequency converter chamber 1, a frequency converter driver 8 and a wiring copper busbar 9 are disposed. The frequency converter driver 8 is used to drive the motor 3 and control the speed of the motor 3. The wiring copper busbar 9 is used for interconnection of electrical components inside the frequency converter chamber 1. The wiring copper busbar 9 replaces the traditional cable, allowing the frequency converter driver 8 and other auxiliary electrical components in the frequency converter chamber 1 to be interconnected through the wiring copper busbar 9. This avoids the risk of cable loosening caused by the vibration of the motor 3, reduces the interference of stray inductance on the drive signal, and achieves a low-impedance, high-reliability electrical connection between the frequency converter driver 8 and the motor 3.

[0023] In this embodiment, the frequency converter wiring chamber 2 is located on the left side of the frequency converter chamber 1. A cable introduction device 13 is provided at the end of the frequency converter wiring chamber 2. The cable introduction device 13 introduces the DC cable input and output control cables into the frequency converter wiring chamber 2. The DC cable input and output control cables are introduced into the frequency converter wiring chamber 2 through the cable introduction device 13 and then enter the frequency converter chamber 1 from the frequency converter wiring chamber 2 to connect with the DC positive input terminal 5 and DC negative input terminal 6 on the frequency converter driver 8 to provide power to the frequency converter driver 8. The cable introduction direction is perpendicular to the power transmission shaft 10, which can prevent the cable from repeatedly bending due to the vibration of the motor 3 or the rotation of the power transmission shaft 10 when the motor 3 is running.

[0024] In this embodiment, the motor 3 is vertically mounted on the explosion-proof surface on the back of the inverter chamber 1. An end cover wiring chamber 4 is provided below the end cover of the motor 3. The end cover wiring chamber 4 is used to connect the winding of the motor 3 and the copper busbar 9. A power transmission shaft 10 is provided above the motor 3. The power transmission shaft 10 is vertically mounted at the output end of the motor 3 to transmit power to the monorail transmission mechanism. The winding of the motor 3 and the copper busbar 9 are connected in the end cover wiring chamber 4, so that the inverter driver 8 drives the motor 3 to work, and the motor 3 drives the power transmission shaft 10 at its output end to rotate, so as to transmit power to the monorail transmission mechanism.

[0025] In this embodiment, a water-cooled heat dissipation mechanism is provided on the back of the inverter chamber 1, on one side of the motor 3. The water-cooled heat dissipation mechanism includes a water-cooled heat dissipation plate 11, which is installed on the explosion-proof surface of the back of the inverter chamber 1. The internal water channels of the water-cooled heat dissipation plate 11 are connected to the heat dissipation pipes of the motor 3 and the inverter driver 8. The heat dissipation plate inlet and outlet nozzles 14 and the motor heat dissipation inlet and outlet nozzles 15 on the motor 3 are both located on the right side of the motor 3. The heat dissipation plate inlet and outlet nozzles 14 and the motor heat dissipation inlet and outlet nozzles 15 are connected by external pipes. By setting the heat dissipation plate inlet and outlet nozzles 14 and the motor heat dissipation inlet and outlet nozzles 15 on the same side and using external pipes to connect the heat dissipation plate inlet and outlet nozzles 14 and the motor heat dissipation inlet and outlet nozzles 15, the heat dissipation pipes are simplified, and the water-cooled heat dissipation plate 11 carries away the heat generated by the inverter driver 8 and the motor 3 through circulating cooling water, realizing the series circulation heat dissipation of the inverter driver 8 and the motor 3 and improving the heat dissipation efficiency.

[0026] In this embodiment, the frequency converter 8 is provided with a communication terminal 7. The communication terminal 7 is used to transmit control signals to realize communication between the frequency converter 8 and the external control system. The frequency converter 8 uses the communication terminal 7 to receive the speed adjustment signal from the external control system, control the motor 3 to run, adjust the speed of the power transmission shaft 10, and change the transmission speed of the monorail. At the same time, the communication terminal 7 feeds back the operating data of the frequency converter 8 to the external control system in real time to realize real-time monitoring of the operating status of the frequency converter 8.

[0027] In this embodiment, a maintenance door that opens from left to right is provided on the front of the housing. The maintenance door is hinged to the outer wall of the housing by a hinge 12 for opening and closing the inverter chamber 1. By using the hinge 12 to open the maintenance door from left to right on the front of the housing, the inverter chamber 1 can be directly opened, so as to realize the maintenance and repair of the inverter driver 8 and the cable connection inside the inverter chamber 1.

[0028] In this embodiment, the back explosion-proof surface of the inverter chamber 1 is provided with an L-shaped sheet metal support leg. The motor 3 is mounted on the L-shaped sheet metal support leg by bolts. The L-shaped sheet metal support leg is used to mount the motor 3 on the back explosion-proof surface of the inverter chamber 1, so that the motor 3 is tightly fixed to the back of the inverter chamber 1. This can shorten the power cable between the two, reduce stray inductance, and improve integration.

[0029] The working principle of this utility model is as follows: The explosion-proof frequency converter integrated machine for mining monorail hoists proposed in this application sets up a frequency converter chamber 1, a frequency converter wiring chamber 2, and a motor 3 on the housing. The frequency converter driver 8 can be installed in the frequency converter chamber 1, integrating the frequency converter driver 8 and the motor 3 onto the housing, shortening the power cable between them, reducing stray inductance. Simultaneously, a copper busbar 9 is used to replace traditional cables, allowing the frequency converter driver 8 and other auxiliary electrical components in the frequency converter chamber 1 to be interconnected via the copper busbar 9. This avoids the risk of cable loosening caused by motor 3 vibration, reduces stray inductance interference to the drive signal, and achieves a low-impedance, high-reliability electrical connection between the frequency converter driver 8 and the motor 3. Then, a cable introduction device 13 is used to introduce the DC cable input and output control cables into the frequency converter wiring chamber 2, allowing the frequency converter to... The DC input and output control cables in the frequency converter chamber 2 enter the inverter chamber 1 and connect to the DC positive input terminal 5 and DC negative input terminal 6 on the frequency converter driver 8 to provide power to the frequency converter driver 8. At the same time, the motor 3 winding and the copper busbar 9 are connected in the end cover wiring chamber 4, so that the frequency converter driver 8 drives the motor 3 to work, and the motor 3 drives the power transmission shaft 10 at its output end to rotate, transmitting power to the monorail transmission mechanism. Finally, external pipelines are used to connect the heat sink inlet and outlet water nozzles 14 and the motor heat sink inlet and outlet water nozzles 15 to simplify the heat dissipation pipeline. The water-cooled heat sink 11 carries away the heat generated by the frequency converter driver 8 and the motor 3 through circulating cooling water, realizing the series circulation heat dissipation of the frequency converter driver 8 and the motor 3, improving the heat dissipation efficiency, and achieving the effect of small size, light weight and stable operation.

[0030] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A mine monorail crane explosion-proof frequency converter integrated machine, comprising: The housing is characterized in that it is provided with a frequency converter chamber (1), a frequency converter wiring chamber (2), and a motor (3), wherein the frequency converter chamber (1) is located on the front of the housing, and a frequency converter driver (8) and a wiring busbar (9) are provided inside the frequency converter chamber (1). The frequency converter driver (8) is used to drive the motor (3) and control the speed of the motor (3). The wiring busbar (9) is used for interconnection of electrical components inside the frequency converter chamber (1). The frequency converter wiring chamber (2) is located on the left side of the frequency converter chamber (1), and the frequency converter wiring chamber (2) is connected to DC cable input and output. The control cable provides power to the frequency converter driver (8); the motor (3) is vertically mounted on the explosion-proof surface on the back of the frequency converter chamber (1); an end cover wiring chamber (4) is provided below the end cover of the motor (3); the end cover wiring chamber (4) is used to connect the winding of the motor (3) to the wiring copper busbar (9); the frequency converter chamber (1), the frequency converter wiring chamber (2) and the end cover wiring chamber (4) are interconnected through explosion-proof through holes; a water-cooling heat dissipation mechanism is provided on the back of the frequency converter chamber (1) on one side of the motor (3); the water-cooling heat dissipation mechanism is used for heat dissipation of the motor (3) and the frequency converter driver (8).

2. The explosion-proof variable frequency integrated machine for mining monorail cranes according to claim 1, characterized in that, The water-cooled heat dissipation mechanism includes a water-cooled heat dissipation plate (11), which is installed on the explosion-proof back side of the inverter chamber (1). The internal water channel of the water-cooled heat dissipation plate (11) is connected to the heat dissipation pipes of the motor (3) and the inverter driver (8). The heat dissipation plate inlet and outlet nozzles (14) on the water-cooled heat dissipation plate (11) and the motor heat dissipation inlet and outlet nozzles (15) on the motor (3) are both located on the right side of the motor (3). The heat dissipation plate inlet and outlet nozzles (14) and the motor heat dissipation inlet and outlet nozzles (15) are connected by external pipes.

3. The explosion-proof variable frequency integrated machine for mining monorail cranes according to claim 1, characterized in that, A power transmission shaft (10) is provided above the motor (3), and the power transmission shaft (10) is vertically installed at the output end of the motor (3) to transmit power to the monorail transmission mechanism.

4. The explosion-proof variable frequency integrated machine for mining monorail cranes according to claim 3, characterized in that, The end of the frequency converter wiring chamber (2) is provided with a cable introduction device (13). The cable introduction device (13) introduces DC cable input and output control cables into the frequency converter wiring chamber (2), and the cable introduction direction is perpendicular to the power transmission shaft (10).

5. The explosion-proof variable frequency integrated machine for mining monorail cranes according to claim 1, characterized in that, The frequency converter (8) is provided with a DC positive input terminal (5), a DC negative input terminal (6) and a communication terminal (7). The DC positive input terminal (5) and the DC negative input terminal (6) are connected to DC cable input and output control cables to receive DC current and provide power to the frequency converter (8). The communication terminal (7) is used to transmit control signals to enable the frequency converter (8) to communicate with an external control system.

6. The explosion-proof frequency conversion integrated machine for mining monorail cranes according to claim 1, characterized in that, The front of the housing is provided with a maintenance door that opens from left to right. The maintenance door is hinged to the outer wall of the housing by a hinge (12) for opening and closing the inverter chamber (1).

7. The explosion-proof variable frequency integrated machine for mining monorail cranes according to claim 1, characterized in that, The back explosion-proof surface of the inverter chamber (1) is provided with an L-shaped sheet metal support leg, and the motor (3) is mounted on the L-shaped sheet metal support leg by bolts.

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