Mine emergency lifting frequency converter power supply and mine emergency power supply system

Abstract

The utility model discloses a mine emergency lifting frequency converter power supply and a mine emergency power supply system. The frequency converter power supply comprises a housing, a power device assembly, a capacitor assembly, a non-inductive bus board, a main control board, a terminal board and a voltage acquisition board. The shell is used for containing electrical elements. The power device assembly is arranged in the shell; the capacitor assembly is arranged in the shell, and the capacitor assembly and the power device assembly are arranged up and down in the shell; the non-inductive bus board is arranged in the shell and is connected with the capacitor assembly, the power device assembly and the quick connecting device; the main control board is installed in the shell and located on the front side of the power device assembly. The terminal board and the voltage acquisition board are installed in the shell and located on the front side of the capacitor assembly. The frequency converter power supply adopts a modular design, is compact in structural design and high in power density, meets the heat dissipation requirement of a power device, meets the requirements of electrical insulation and interference resistance, and is also convenient to mount and dismount.

Description

Technical Field

[0001] This utility model relates to a frequency converter power supply for emergency hoisting in mines, belonging to the technical field of mine hoisting machines. Background Technology

[0002] Mine hoists, as the sole transportation channel between the surface and underground, are the lifeblood of mines. Their safe and stable operation is crucial to mine production. The hoist's electrical control system is the "brain" of its operation, and its performance directly affects the hoist's efficiency and safety. Therefore, the development and advancement of hoist electrical control technology has always been a key focus for relevant enterprises and research institutions.

[0003] As the depth of mineral resource extraction in my country increases, the scale of mine hoists is also expanding, highlighting the growing importance of electrical control systems. Large hoists place high demands on the stability and reliability of their electrical control systems. System failures can not only cause significant economic losses but also threaten the lives of personnel.

[0004] For hoist systems, in emergency power supply situations, the auxiliary system power should be restored first, including equipment such as the hydraulic station, lubrication station, signal system, and PLC controller. Typically, these loads are powered by a 380V three-phase AC power supply. However, the start-up and shutdown of the hydraulic and lubrication stations cause significant load surges, which can lead to voltage drops in the auxiliary power supply and significantly impact power quality. Furthermore, due to the complex control system of the hoist, conducted interference from the control power supply can easily cause electromagnetic interference in multiple devices, leading to signal malfunctions. Therefore, the auxiliary power supply should have good electromagnetic compatibility, especially low conducted interference. Utility Model Content

[0005] To address the voltage drop caused by impact loads and reduce conducted interference in auxiliary power supplies, this invention provides a mine emergency hoisting frequency converter power supply and a mine emergency power supply system.

[0006] This utility model is achieved according to the following technical solution:

[0007] Firstly, this utility model provides a mine emergency hoisting frequency converter power supply, wherein one frequency converter power supply is a rectifier based on a complete T-type three-level topology; the frequency converter power supply includes:

[0008] A housing used to contain electrical components;

[0009] Power device components are mounted in the housing;

[0010] The capacitor assembly is installed in the housing and is placed vertically above the power device assembly within the housing;

[0011] A non-inductive busbar is installed in the housing and connected to the capacitor assembly, power device assembly and quick-connect device;

[0012] The main control board is installed in the housing and is located on the front side of the power device assembly;

[0013] The terminal block and voltage acquisition board are installed in the housing and located on the front side of the capacitor assembly.

[0014] In some embodiments, the power device assembly is formed by fixing an IGBT and its driver board onto a heat sink.

[0015] In some embodiments, the air inlet of the air-cooled radiator is located on the bottom surface of the housing, and the air outlet is located on the top surface of the housing; at least one cooling fan is installed at the air outlet of the air-cooled radiator.

[0016] In some embodiments, the number of IGBTs is three, and the number of IGBT driver boards is three.

[0017] In some embodiments, the capacitor assembly consists of eight electrolytic capacitors, which are arranged in two rows of four on the top and four on the bottom.

[0018] In some embodiments, a current sensor is connected to each of the three copper busbars on the non-sensory busbar.

[0019] In some embodiments, a touch screen is also installed in the housing, and the housing has a window for displaying the touch screen.

[0020] Secondly, this utility model provides a mine emergency power supply system, including a battery cluster, an integrated power supply device, a water-cooled cabinet, a control box, a transformer, and a fire extinguishing system; the integrated power supply device includes a regulating cabinet and a converter cabinet; the regulating cabinet includes the aforementioned mine emergency hoisting frequency converter power supply; the converter cabinet includes multiple power units.

[0021] In some embodiments, the power unit includes:

[0022] shell;

[0023] A heat dissipation component, consisting of an air-cooled radiator and a cooling fan, is installed inside the housing to dissipate heat from the components of the housing.

[0024] A power device assembly consisting of an IGBT and its driver board mounted on a heat dissipation component;

[0025] A capacitor assembly is placed side-by-side with the power unit assembly inside the housing and is secured to the housing by fasteners;

[0026] A quick-connect device is mounted on the rear panel of the housing;

[0027] A horizontally placed, non-inductive busbar is connected to the capacitor assembly, IGBT, and quick-connect device.

[0028] A shielded box containing a pulse distribution board is installed inside the outer casing;

[0029] A power distribution circuit board is installed inside the housing.

[0030] In some embodiments, the water-cooled cabinet provides water cooling for the battery cluster and integrated power supply unit; the fire extinguishing system consists of a gas cabinet, pipes, nozzles, pressure relief device, and fire alarm.

[0031] The beneficial effects of this utility model are:

[0032] This invention integrates the emergency power supply and emergency drive of the hoist into one unit. In emergency situations, a battery-powered energy storage box can provide control power to the hoist while simultaneously driving it. This improves the coordination between the power supply system and the hoist motor drive system, effectively ensuring reliable operation of the DC motor hoist under emergency power supply conditions. The frequency converter power supply adopts a modular design with a compact structure and high power density, meeting the heat dissipation requirements of power devices while also satisfying electrical insulation and anti-interference requirements. It is also easy to install and disassemble. Attached Figure Description

[0033] The accompanying drawings, as part of this utility model, are used to provide a further understanding of the present utility model. The illustrative embodiments and descriptions of the present utility model are used to explain the present utility model, but do not constitute an undue limitation of the present utility model. Obviously, the drawings described below are merely some embodiments; those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0034] In the attached diagram:

[0035] Figure 1 This is an exploded view of the power supply for the mine emergency hoisting frequency converter of this utility model;

[0036] Figure 2 This is a layout diagram of the mine emergency power supply system of this utility model;

[0037] Figure 3 This is a schematic diagram of the integrated power supply device of this utility model;

[0038] Figure 4 This is an exploded view of the power unit of this utility model.

[0039] Attached labels: 101-Housing, 102-IGBT, 103-Driver board, 104-Capacitor assembly, 105-Air-cooled heat sink, 106-Cooling fan, 107-Inductive busbar, 108-Main control board, 109-Terminal board, 110-Voltage acquisition board, 111-Current sensor, 112-Touch screen;

[0040] 201-Integrated power supply unit, 202-Battery cluster, 203-Water-cooled cabinet, 204-Control box, 205-Transformer, 206-Automatic gas fire extinguishing system;

[0041] 301 - Regulator cabinet; 302 - Converter cabinet;

[0042] 401 - Housing, 402 - Air-cooled heat sink, 403 - IGBT and its driver board, 404 - Capacitor assembly, 405 - Quick-connect device, 406 - Non-inductive busbar, 407 - Shielding box

[0043] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0045] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0046] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0047] like Figure 1As shown, a mine emergency hoisting frequency converter power supply is provided. The frequency converter power supply is a rectifier based on a complete T-type three-level topology. The frequency converter power supply includes a housing 101, power device components, a capacitor assembly 104, a non-inductive busbar 107, a main control board 108, a terminal block 109, and a voltage acquisition board 110. The housing 101 is used to house electrical components. The power device components are installed in the housing 101. The capacitor assembly 104 is installed in the housing 101 and is placed vertically above the power device components within the housing 101. The non-inductive busbar 107 is installed in the housing 101 and is connected to the capacitor assembly 104, the power device components, and a quick-connect device. The main control board 108 is installed in the housing 101 and is located in front of the power device components. The terminal block 109 and the voltage acquisition board 110 are installed in the housing 101 and are located in front of the capacitor assembly 104.

[0048] Further plans will continue to be considered. Figure 1 As shown, the power device assembly is formed by fixing the IGBT 102 and its driver board 103 onto the air-cooled heat sink 105.

[0049] Further plans will continue to be considered. Figure 1 As shown, the air inlet of the air-cooled radiator 105 is located on the bottom surface of the housing 101, and the air outlet is located on the top surface of the housing 101; at least one cooling fan 106 is installed at the air outlet of the air-cooled radiator 105.

[0050] Further plans will continue to be considered. Figure 1 As shown, there are three IGBTs 102 and three IGBT driver boards 103. The capacitor assembly 104 consists of eight electrolytic capacitors, which are arranged in two rows of four on the top and four on the bottom.

[0051] Further plans will continue to be considered. Figure 1 As shown, each of the three copper busbars on the non-inductive busbar 107 is connected to a current sensor 111.

[0052] Further plans will continue to be considered. Figure 1 As shown, a touch screen 112 is also installed in the housing 101, and a window is provided on the housing 101 for displaying the touch screen 112.

[0053] It should be noted that since the non-inductive busbar is connected to the capacitor, IGBT, and quick-connect device, the stray inductance of the circuit with the closest distance between the main capacitor and the IGBT is small, which also reduces adverse factors such as electromagnetic interference caused by secondary connections, and makes it more convenient to connect AC and DC copper busbars to the outside.

[0054] like Figure 2 , Figure 3As shown, a mine emergency power supply system includes two battery clusters 202, an integrated power supply unit 201, a water-cooled cabinet 203, a control box 204, a transformer 205, and a gas automatic fire extinguishing system 206; the integrated power supply unit 201 includes a regulating cabinet 301 and a converter cabinet 302; the regulating cabinet 301 includes the aforementioned mine emergency hoisting frequency converter power supply; the converter cabinet 302 includes multiple power units.

[0055] It should be noted that the battery cluster 202 has a series of unique advantages such as high operating voltage, high energy density, long cycle life, low self-discharge rate, no memory effect, and green environmental protection. It also supports infinite expansion and is suitable for large-scale energy storage.

[0056] It should be noted that the converter cabinet 302 measures 800*2000*1000mm (width*height*depth); each power unit is placed on one layer, for a total of three power units. The regulating cabinet 301 measures 800*2000*1000mm (width*height*depth), and its door is equipped with a touch screen, indicator lights, and operating buttons. The cabinet contains one engine cage, one single-phase transformer, one reactor, three film capacitors, three fast-acting fuses, three voltage sensors, three switching power supplies, one UPS, six miniature circuit breakers, nine relays, one hundred and twenty terminal blocks, and one mine emergency hoisting frequency converter power supply. The aforementioned components are connected by bolts, mounting plates, etc., forming four modules, which are then fixedly installed in their respective positions within the control cabinet.

[0057] Further plans will continue to be considered. Figure 2 As shown, two water-cooled cabinets 203 provide water-cooling for the two battery clusters 202, and also for the integrated power unit 201. The water-cooling system uses pure water and ethylene glycol as the circulating medium, and heat is discharged through a water-air heat exchanger. This provides a suitable temperature for the energy storage system, ensuring higher battery charging and discharging efficiency and longer battery cycle life. The automatic gas fire suppression system 206 consists of a gas cabinet, pipes, nozzles, pressure relief devices, fire alarms, and other facilities. The cabinet is usually located at one end of the compartment and is connected to all the gas nozzles installed on the top of the compartment via a pipe network, thus forming the automatic gas fire suppression system 206. Simultaneously, after the heptafluoropropane is injected, it changes from a liquid to a gaseous state, causing a rapid increase in pressure inside the compartment. As the battery compartment is a sealed space, a corresponding pressure relief port is required. This device should be specifically designed according to the pressure that the battery compartment structure can withstand to prevent cracks from appearing in the battery compartment. When any electrical component in the prefabricated battery compartment catches fire, the automatic gas fire suppression system is activated first, and all gas nozzles release extinguishing agents to extinguish the initial fire using a total flooding method.

[0058] Further options, such as Figure 4As shown, the power unit 40 includes a housing 401, a power device assembly, a capacitor assembly 404, a quick-connect device 405, a non-inductive busbar 406, a heat dissipation component, a pulse distribution board, a shielding box 407, and a power distribution circuit board. The heat dissipation component is installed inside the housing 401 to dissipate heat from the components of the housing 401. The heat dissipation component consists of an air-cooled radiator 402 and a cooling fan. The air inlet of the air-cooled radiator 402 is located on the front of the housing 401, and the air outlet is located on the back of the housing 401. The cooling fan is installed at the air outlet position of the air-cooled radiator 402. The power device assembly is formed by mounting IGBTs and their driver boards 403 onto the air-cooled radiator 402 with bolts. The capacitor assembly 404 and the power device assembly are located inside the housing 401. The components are placed side-by-side and fixed to the housing 401 with bolts; the quick-connect device 405 is fixed to the rear plate of the housing 401 with bolts; the non-inductive busbar 406 is connected to the capacitor assembly 404, IGBT and quick-connect device 405 with bolts. This reduces the stray inductance of the circuit where the main capacitor and IGBT are closest, and also reduces adverse factors such as electromagnetic interference caused by secondary connections, and makes it more convenient to connect AC and DC copper busbars to the outside; the non-inductive busbar 406 is placed horizontally, which effectively eliminates the stress problem at the connection between the busbar and IGBT; the pulse distribution board is installed in the shielding box with bolts, and the shielding box 407 is installed on the front plate of the housing 401 on the left side of the air-cooled heat sink 402 with bolts; the power distribution circuit board is installed inside the housing 401.

[0059] Numerous specific details are set forth in the specification provided herein. However, it will be understood that embodiments of the present invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0060] Furthermore, those skilled in the art will understand that although some embodiments described herein include certain features found in other embodiments but not others, combinations of features from different embodiments are also within the scope of protection of this invention and form different embodiments. For example, in the embodiments described above, those skilled in the art can use them in combination based on known technical solutions and the technical problems to be solved by this application.

[0061] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A frequency converter power supply for emergency hoisting in mines, characterized in that, A frequency converter power supply is a rectifier based on a complete T-type three-level topology. The inverter power supply includes: A housing used to contain electrical components; Power device components are mounted in the housing; The capacitor assembly is installed in the housing and is placed vertically above the power device assembly within the housing; A non-inductive busbar is installed in the housing and connected to the capacitor assembly, power device assembly and quick-connect device; The main control board is installed in the housing and is located on the front side of the power device assembly; The terminal block and voltage acquisition board are installed in the housing and located on the front side of the capacitor assembly.

2. The mine emergency hoisting frequency converter power supply according to claim 1, characterized in that: The power device assembly is formed by fixing the IGBT and its driver board onto an air-cooled heat sink.

3. The mine emergency hoisting frequency converter power supply according to claim 2, characterized in that: The air inlet of the air-cooled radiator is located on the bottom surface of the casing, and the air outlet is located on the top surface of the casing. At least one cooling fan is installed at the air outlet of the air-cooled radiator.

4. A mine emergency hoisting frequency converter power supply according to claim 2, characterized in that: The number of IGBTs is three, and the number of IGBT driver boards is three.

5. A mine emergency hoisting frequency converter power supply according to claim 1, characterized in that: The capacitor assembly consists of eight electrolytic capacitors, which are arranged in two rows of four on the top and four on the bottom.

6. The mine emergency hoisting frequency converter power supply according to claim 1, characterized in that: Each of the three copper busbars on the non-inductive busbar is connected to a current sensor.

7. The mine emergency hoisting frequency converter power supply according to claim 1, characterized in that: The housing also houses a touchscreen, and the housing has a window for displaying the touchscreen.

8. A mine emergency power supply system, characterized in that: This includes battery clusters, integrated power supply units, water-cooled cabinets, control boxes, transformers, and fire extinguishing systems; The integrated power supply unit includes a regulating cabinet and a converter cabinet; The regulating cabinet includes the mine emergency hoisting frequency converter power supply as described in any one of claims 1 to 7; The converter cabinet includes multiple power units.

9. A mine emergency power supply system according to claim 8, characterized in that, The power unit includes: shell; A heat dissipation component, consisting of an air-cooled radiator and a cooling fan, is installed inside the housing to dissipate heat from the components of the housing. A power device assembly consisting of an IGBT and its driver board mounted on a heat dissipation component; A capacitor assembly is placed side-by-side with the power device assembly inside the housing and is secured to the housing by fasteners. A quick-connect device is mounted on the rear panel of the housing; A horizontally placed, non-inductive busbar is connected to the capacitor assembly, IGBT, and quick-connect device. A shielded box containing a pulse distribution board is installed inside the outer casing; A power distribution circuit board is installed inside the housing.

10. A mine emergency power supply system according to claim 8, characterized in that: The water-cooled cabinet provides water cooling for the battery cluster and integrated power supply unit; the fire extinguishing system consists of a gas cabinet, pipelines, nozzles, pressure relief device, and fire alarm.

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