Mining explosion-proof combined frequency converter

Abstract

The utility model provides a mining explosion-proof combined frequency converter which comprises a frequency converter assembly and an explosion-proof shell, the inside of the explosion-proof shell is divided into a wire inlet cavity, an isolation protection cavity, a main cavity, a reactor cavity and a wire outlet cavity by partition plates, each single-machine-core frequency converter is independently arranged, multiple cavities are arranged in a combined mode, control connecting wires of each single-machine-core frequency converter are reduced, and the frequency conversion efficiency is improved. The occupied area is reduced; the opening is formed in the joint of the inner side of the explosion-proof shell and the frequency converter assembly, the water cooling assembly is arranged in the opening and abuts against the outer side of the frequency converter assembly, the explosion-proof requirement is met, and water cooling heat dissipation is effectively conducted on the frequency converter assembly; the frequency converter assembly adopts a core-pulling design and can be integrally moved out along the sliding chute during maintenance, so that the frequency converter assembly is fast, safe and convenient to maintain.

Description

Technical Field

[0001] This utility model relates to the field of mining equipment manufacturing technology, and more specifically, to a mining explosion-proof combined frequency converter. Background Technology

[0002] Currently, in fully mechanized coal mining and tunneling faces both domestically and internationally, as the power of coal mining equipment continues to increase, the load on equipment responsible for coal transportation (such as scraper conveyors, belt conveyors, and transfer conveyors) is also gradually increasing. Therefore, the control systems for scraper conveyors, belt conveyors, and transfer conveyors generally use multiple independent explosion-proof frequency converters to achieve soft starts, reduce the impact on the power grid and machinery, and realize speed regulation functions.

[0003] The closest existing technology is disclosed in patent number CN217545849U, which discloses a mining-use combined frequency converter explosion-proof enclosure, comprising a cubic enclosure body with one open side and multiple sets of core fixing components; one set of core fixing components includes a core fixing frame and a set of enclosure frequency converter system fixed on the core fixing frame, the bottom of the core fixing frame is equipped with fixing frame pulleys, and a rear door panel is fixed on one side of the core fixing frame, and the rear door panels of the multiple sets of core fixing components are sequentially adjacent and matched with the open side of the enclosure body.

[0004] Existing mining-grade combined frequency converters only use water-cooled plates for cooling, resulting in poor cooling efficiency and an inability to be flexibly adjusted as needed, further reducing cooling efficiency.

[0005] In view of this, this utility model proposes a mine explosion-proof combined frequency converter with good cooling effect and simple structure. Utility Model Content

[0006] The purpose of this utility model is to propose a mine explosion-proof combined frequency converter with good cooling effect and simple structure.

[0007] A mine-use explosion-proof combined frequency converter includes a frequency converter assembly 1 and an explosion-proof housing 2. The explosion-proof housing 2 is characterized by a quick-opening door 3 on one side, with a control feedback unit 10 mounted on the quick-opening door 3. The feedback unit is used to provide feedback on the real-time status inside the explosion-proof housing 2 and control the frequency converter assembly 1. The explosion-proof housing 2 is divided by a partition into an inlet cavity 4, an isolation protection cavity 5, a main cavity 6, a reactor chamber 7, and an outlet cavity 8. Multiple frequency converter assemblies 1 are spaced apart within the main cavity 6. The inlet cavity 4 has a speaker wiring inlet 41 at its input end. The outlet cavity 8... The output end is provided with a speaker wiring outlet 81. The isolation protection cavity 5 is provided with an isolation reversing switch 51. The reactor chamber 7 is provided with a reactor 71. The reactor 71 is connected to the frequency converter assembly 1. The reactor 71 is used for filtering and anti-interference. The explosion-proof housing 2 has an opening at the connection between the inside and the frequency converter assembly 1. The opening is provided with a water cooling assembly 9. The water cooling assembly 9 abuts against the outside of the frequency converter assembly 1. The water cooling assembly 9 is used for water cooling heat dissipation of the frequency converter assembly 1. The frequency converter assembly 1, the reactor 71, and the water cooling assembly 9 are electrically connected to the control feedback unit 10.

[0008] Furthermore, the water-cooled assembly 9 includes a water-cooled plate 91, an explosion-proof plate 92, a water-cooled inlet pipe 93, and a solenoid valve 94. The water-cooled plate 91 is located at the end of the inverter assembly 1 with its opening close to the outside of the inverter assembly 1. The explosion-proof plate 92 is located at the end of the inverter assembly 1 with its opening away from the opening. Multiple first fixing members 96 are provided around the water-cooled plate 91, and the water-cooled plate 91 is fixedly connected to the explosion-proof plate 92 through the multiple first fixing members 96. Multiple second fixing members 97 are provided around the explosion-proof plate 92, and the explosion-proof plate 92 is fixedly connected to the explosion-proof housing 2 through the multiple second fixing members 97. A solenoid valve 94 is provided at the input end of the water-cooled plate 91. The output end of the solenoid valve 94 is connected to an external circulating water supply device through the water-cooled inlet pipe 93, and the output end of the water-cooled plate 91 is connected to the external circulating water supply device through the water-cooled outlet pipe. The solenoid valve 94 is electrically connected to the control feedback unit 10.

[0009] Furthermore, a filter 95 is provided at the input end of the water-cooled water inlet pipe 93, which is used to filter impurities from the input cooling water.

[0010] Furthermore, the filter 95 is a Y-type flange filter 95.

[0011] In some embodiments, the distance between the outer side of the water-cooled plate 91 and the outer side of the explosion-proof plate 92 is less than 50 mm, which serves to provide explosion protection.

[0012] In some embodiments, a vacuum tube is provided between the horn wiring inlet 41 and the isolating reversing switch 51, and the vacuum tube is used to extinguish the arc.

[0013] In some embodiments, the reactor chamber 7 is further provided with a contactor 72, which functions to disconnect or connect to control the frequency converter assembly 1.

[0014] In some embodiments, the quick-opening door 3 is also provided with an electromechanical interlocking component 31 on the side. During maintenance, the quick-opening door 3 can be opened by opening the electromechanical interlocking component 31 for safe maintenance.

[0015] In some embodiments, the inverter assembly 1 includes an inverter core 11, a support platform 12, an auxiliary bracket 13, and a first screw 14. Multiple support platforms 12 are spaced apart within the main cavity 6. An auxiliary bracket 13 is positioned above each support platform 12. Each support platform 12 has a sliding groove 121 on both sides of its upper end. The bottom of the inverter core 11 has a corresponding sliding part 122, which is connected to the sliding groove 121 via the sliding part 122. The other end of each support platform 12 has an auxiliary bracket 13, with a quick-connect interface in the middle. The outer side of the inverter core 11 is connected to the quick-connect interface. The inverter core 11 is fixedly connected to the auxiliary bracket 13 via the first screw 14, which is used to fix the positions of the inverter core 11 and the auxiliary bracket 13.

[0016] The beneficial effects of this utility model are as follows: This utility model proposes a mine explosion-proof combined frequency converter, including a frequency converter assembly 1 and an explosion-proof housing 2. The explosion-proof housing 2 is divided into an inlet cavity 4, an isolation protection cavity 5, a main cavity 6, a reactor cavity 7, and an outlet cavity 8 by a partition. Each single-core frequency converter is set independently, and the multi-cavity combination reduces the control wiring of each single-core frequency converter and reduces the floor space. An opening is provided at the connection between the explosion-proof housing 2 and the frequency converter assembly 1. A water-cooling assembly 9 is installed in the opening. The water-cooling assembly 9 abuts against the outside of the frequency converter assembly 1 and meets the explosion-proof requirements, effectively cooling the frequency converter assembly 1. The frequency converter assembly 1 is a pull-out design. During maintenance, the frequency converter assembly 1 can be moved out as a whole along the slide 121, which is quick, safe and convenient for maintenance. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a mine explosion-proof combined frequency converter according to this application.

[0018] Figure 2 This is a schematic diagram of the structure of a mine explosion-proof combined frequency converter according to this application.

[0019] Figure 3 for Figure 2 A partially enlarged structural diagram.

[0020] Figure 4 This is a schematic diagram of the structure of a mine explosion-proof combined frequency converter according to this application.

[0021] Figure 5 This is a schematic diagram of the structure of a mine explosion-proof combined frequency converter according to this application.

[0022] Figure 6 This is a schematic diagram of the inverter assembly of a mine explosion-proof combined inverter according to this application.

[0023] Figure 7 This is a schematic diagram of the inverter assembly of a mine explosion-proof combined inverter according to this application.

[0024] Explanation of main component symbols

[0025] 1. Inverter assembly; 2. Explosion-proof housing; 3. Quick-opening door; 4. Electromechanical interlocking assembly; 5. Inlet cavity; 6. Horn wiring inlet; 7. Isolation protection cavity; 8. Isolation reversing switch; 9. Main cavity; 10. Reactor chamber; 11. Reactor; 12. Contactor; 13. Outlet cavity; 14. Horn wiring outlet; 15. Water cooling assembly; 16. Water cooling plate; 17. Explosion-proof plate; 18. Water cooling inlet pipe; 19. Solenoid valve; 20. Filter; 21. First fixing component; 22. Second fixing component; 33. Control feedback unit; 44. Inverter mechanism; 55. Support platform; 66. Slide groove; 77. Sliding part; 88. Auxiliary bracket; 99. First screw.

[0026] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this utility model. Detailed Implementation

[0027] The following embodiments are described to aid in understanding this application. These embodiments are not, and should not be, construed in any way as limiting the scope of protection of this application.

[0028] In the following description, those skilled in the art will recognize that throughout this discussion, components may be described as individual functional units (which may include subunits), but those skilled in the art will recognize that various components or portions thereof may be divided into individual components or may be integrated together (including integrated within a single system or component).

[0029] Furthermore, the connection between components or systems is not intended to be limited to a direct connection; on the contrary, data between these components may be modified, reformatted, or otherwise altered by intermediate components. Additionally, other or fewer connections may be used. It should also be noted that the terms "connection," "link," or "input" should be understood to include direct connections, indirect connections via one or more intermediate devices, and wireless connections.

[0030] Example 1:

[0031] like Figure 1 The diagram shown is a structural schematic of a mine explosion-proof combined frequency converter according to this application; Figure 2The diagram shown is a structural schematic of a mine explosion-proof combined frequency converter according to this application; Figure 3 As shown, Figure 2 A partially enlarged structural diagram; such as Figure 4 The diagram shown is a structural schematic of a mine explosion-proof combined frequency converter according to this application; Figure 5 The diagram shown is a structural schematic of a mine explosion-proof combined frequency converter according to this application; Figure 6 The diagram shown is a schematic diagram of the inverter assembly of a mine explosion-proof combined inverter according to this application. Figure 7 This is a schematic diagram of the inverter assembly of a mine explosion-proof combined inverter according to this application.

[0032] A mine-use explosion-proof combined frequency converter includes a frequency converter assembly 1 and an explosion-proof housing 2. The explosion-proof housing 2 is characterized by a quick-opening door 3 on one side, with a control feedback unit 10 mounted on the quick-opening door 3. The feedback unit is used to provide feedback on the real-time status inside the explosion-proof housing 2 and control the frequency converter assembly 1. The explosion-proof housing 2 is divided by a partition into an inlet cavity 4, an isolation protection cavity 5, a main cavity 6, a reactor chamber 7, and an outlet cavity 8. Multiple frequency converter assemblies 1 are spaced apart within the main cavity 6. The inlet cavity 4 has a speaker wiring inlet 41 at its input end. The outlet cavity 8... The output end is provided with a speaker wiring outlet 81. The isolation protection cavity 5 is provided with an isolation reversing switch 51. The reactor chamber 7 is provided with a reactor 71. The reactor 71 is connected to the frequency converter assembly 1. The reactor 71 is used for filtering and anti-interference. The explosion-proof housing 2 has an opening at the connection between the inside and the frequency converter assembly 1. The opening is provided with a water cooling assembly 9. The water cooling assembly 9 abuts against the outside of the frequency converter assembly 1. The water cooling assembly 9 is used for water cooling heat dissipation of the frequency converter assembly 1. The frequency converter assembly 1, the reactor 71, and the water cooling assembly 9 are electrically connected to the control feedback unit 10.

[0033] The water-cooled assembly 9 includes a water-cooled plate 91, an explosion-proof plate 92, a water-cooled inlet pipe 93, and a solenoid valve 94. The water-cooled plate 91 is located at the end of the inverter assembly 1 with its opening close to the outside of the inverter assembly 1. The explosion-proof plate 92 is located at the end of the inverter assembly 1 with its opening away from the opening. Multiple first fixing members 96 are provided around the water-cooled plate 91, and the water-cooled plate 91 is fixedly connected to the explosion-proof plate 92 through the multiple first fixing members 96. Multiple second fixing members 97 are provided around the explosion-proof plate 92, and the explosion-proof plate 92 is fixedly connected to the explosion-proof housing 2 through the multiple second fixing members 97. A solenoid valve 94 is located at the input end of the water-cooled plate 91. The output end of the solenoid valve 94 is connected to an external circulating water supply device through the water-cooled inlet pipe 93, and the output end of the water-cooled plate 91 is connected to the external circulating water supply device through the water-cooled outlet pipe. The solenoid valve 94 is electrically connected to the control feedback unit 10.

[0034] The water-cooled water inlet pipe 93 is also equipped with a filter 95, which is used to filter impurities from the input cooling water.

[0035] The filter 95 is a Y-type flange filter 95.

[0036] The distance between the outer side of the water-cooled plate 91 and the outer side of the explosion-proof plate 92 is less than 50mm, which serves as an explosion-proof function.

[0037] A vacuum tube is provided between the horn wiring inlet 41 and the isolating reversing switch 51. The vacuum tube is used to extinguish the arc.

[0038] The reactor chamber 7 is also equipped with a contactor 72, which is used to open or close the inverter assembly 1.

[0039] The quick-opening door 3 is also equipped with an electromechanical interlocking component 31 on the side. During maintenance, the quick-opening door 3 can be opened by opening the electromechanical interlocking component 31 for safe maintenance.

[0040] The inverter assembly 1 includes an inverter core 11, a support platform 12, an auxiliary bracket 13, and a first screw 14. Multiple support platforms 12 are spaced apart within the main cavity 6. An auxiliary bracket 13 is positioned above each support platform 12. Each support platform 12 has a sliding groove 121 on both sides of its upper end. A corresponding sliding part 122 is provided at the bottom of the inverter core 11, and the inverter core 11 is connected to the sliding groove 121 via the sliding part 122. An auxiliary bracket 13 is provided at the other end of each support platform 12. A quick-connect interface is provided in the middle of the auxiliary bracket 13, and the outer side of the inverter core 11 is connected to the quick-connect interface. The inverter core 11 is fixedly connected to the auxiliary bracket 13 via the first screw 14, which is used to fix the positions of the inverter core 11 and the auxiliary bracket 13.

[0041] The beneficial effects of this utility model are as follows: This utility model proposes a mine explosion-proof combined frequency converter, including a frequency converter assembly 1 and an explosion-proof housing 2. The explosion-proof housing 2 is divided into an inlet cavity 4, an isolation protection cavity 5, a main cavity 6, a reactor cavity 7, and an outlet cavity 8 by a partition. Each single-core frequency converter is set independently, and the multi-cavity combination reduces the control wiring of each single-core frequency converter and reduces the floor space. An opening is provided at the connection between the explosion-proof housing 2 and the frequency converter assembly 1. A water-cooling assembly 9 is installed in the opening. The water-cooling assembly 9 abuts against the outside of the frequency converter assembly 1 and meets the explosion-proof requirements, effectively cooling the frequency converter assembly 1. The frequency converter assembly 1 is a pull-out design. During maintenance, the frequency converter assembly 1 can be moved out as a whole along the slide 121, which is quick, safe and convenient for maintenance.

[0042] Although this application discloses several aspects and embodiments, other aspects and embodiments will be obvious to those skilled in the art. Various modifications and improvements can be made without departing from the concept of this application, and these all fall within the scope of protection of this application. The various aspects and embodiments disclosed in this application are for illustrative purposes only and are not intended to limit this application. The actual scope of protection of this application is determined by the claims.

Claims

1. A mine-use explosion-proof combined frequency converter, comprising a frequency converter assembly (1) and an explosion-proof housing (2), characterized in that: A quick-opening door (3) is provided on one side of the explosion-proof housing (2). A control feedback unit (10) is provided on the quick-opening door (3). The feedback unit is used to provide feedback on the real-time status inside the explosion-proof housing (2) and control the frequency converter assembly (1). The explosion-proof housing (2) is divided into an inlet cavity (4), an isolation protection cavity (5), a main cavity (6), a reactor chamber (7), and an outlet cavity (8) by a partition. Multiple frequency converter assemblies (1) are spaced apart in the main cavity (6). A horn wiring inlet (41) is provided at the input end of the inlet cavity (4), and a horn wiring outlet (81) is provided at the output end of the outlet cavity (8). An isolation reversing switch (51) is provided in the protective cavity (5), and a reactor (71) is provided in the reactor chamber (7). The reactor (71) is connected to the frequency converter assembly (1). The reactor (71) is used for filtering and anti-interference. An opening is provided at the connection between the inner side of the explosion-proof housing (2) and the frequency converter assembly (1). A water-cooling assembly (9) is provided in the opening. The water-cooling assembly (9) abuts against the outer side of the frequency converter assembly (1). The water-cooling assembly (9) is used for water cooling heat dissipation of the frequency converter assembly (1). The frequency converter assembly (1), the reactor (71), the water-cooling assembly (9) are electrically connected to the control feedback unit (10).

2. The explosion-proof combined frequency converter for mining as described in claim 1, characterized in that: The water-cooling assembly (9) includes a water-cooling plate (91), an explosion-proof plate (92), a water-cooling inlet pipe (93), and a solenoid valve (94). The water-cooling plate (91) is located at the end of the opening near the inverter assembly (1) and abuts against the outside of the inverter assembly (1). The explosion-proof plate (92) is located at the end of the opening away from the inverter assembly (1). Multiple first fixing members (96) are provided around the water-cooling plate (91), and the water-cooling plate (91) is fixed to the explosion-proof plate (92) by the multiple first fixing members (96). The explosion-proof plate (92) is connected to the explosion-proof housing (2) by multiple second fasteners (97) around its perimeter. The explosion-proof plate (92) is fixedly connected to the explosion-proof housing (2) by multiple second fasteners (97). The input end of the water-cooled plate (91) is equipped with a solenoid valve (94). The output end of the solenoid valve (94) is connected to the external circulating water supply equipment through the water-cooled inlet pipe (93). The output end of the water-cooled plate (91) is connected to the external circulating water supply equipment through the water-cooled outlet pipe. The solenoid valve (94) is electrically connected to the control feedback unit (10).

3. The explosion-proof combined frequency converter for mining as described in claim 2, characterized in that: The water-cooled inlet pipe (93) is also equipped with a filter (95) at its inlet end. The filter (95) is used to filter impurities from the input cooling water.

4. The explosion-proof combined frequency converter for mining as described in claim 3, characterized in that: The filter (95) is a Y-type flange filter (95).

5. The explosion-proof combined frequency converter for mining as described in claim 2, characterized in that: The distance between the outer side of the water-cooled plate (91) and the outer side of the explosion-proof plate (92) is less than 50mm, which serves as an explosion-proof function.

6. The explosion-proof combined frequency converter for mining as described in claim 1, characterized in that: A vacuum tube is provided between the horn wiring inlet (41) and the isolating reversing switch (51), and the vacuum tube is used to extinguish the arc.

7. The explosion-proof combined frequency converter for mining as described in claim 1, characterized in that: The reactor chamber (7) is also equipped with a contactor (72), which is used to open or close the inverter assembly (1).

8. The explosion-proof combined frequency converter for mining as described in claim 1, characterized in that: The quick-opening door (3) is also equipped with an electromechanical interlocking component (31) on the side. When performing maintenance, the quick-opening door (3) can be opened by opening the electromechanical interlocking component (31) for safe maintenance.

9. The explosion-proof combined frequency converter for mining as described in claim 1, characterized in that: The inverter assembly (1) includes an inverter core (11), a support platform (12), an auxiliary bracket (13), and a first screw (14). Multiple support platforms (12) are spaced apart in the main cavity (6). An auxiliary bracket (13) is provided above each support platform (12). A sliding groove (121) is provided on both sides above one end of each support platform (12). A corresponding sliding part (122) is provided at the bottom of the inverter core (11). The inverter core (11) is connected to the sliding groove (121) through the sliding part (122). An auxiliary bracket (13) is provided at the other end of each support platform (12). A quick-connect interface is provided in the middle of the auxiliary bracket (13). The outer side of the inverter core (11) is connected to the quick-connect interface. The inverter core (11) is fixedly connected to the auxiliary bracket (13) through the first screw (14). The first screw (14) is used to fix the position of the inverter core (11) and the auxiliary bracket (13).

Images