Mining explosion-proof intrinsically-safe combined power electric cabinet

Abstract

The utility model provides a mining explosion-proof intrinsically safe combined power electric control box, which comprises an explosion-proof box body and an intrinsically safe control unit, a control loop unit is arranged in a control cavity, a variable frequency power unit is arranged in a main cavity, a water-cooling heat dissipation unit is arranged on the outer side of the variable frequency power unit, and an auxiliary supporting and carrying unit is further arranged on the outer side of the variable frequency power unit. The auxiliary supporting and carrying unit is used for providing an auxiliary platform for carrying the variable-frequency power unit to facilitate loading, unloading and maintenance of the variable-frequency power unit; the frequency conversion power unit, the starter unit and the intrinsic safety control unit are integrated and combined, the occupied area is reduced, rotating speed and power balance of multiple frequency converters is achieved, heavy-load soft starting under various load conditions is met, and the use requirements of underground equipment are met.

Description

Technical Field

[0001] This utility model relates to the field of mining equipment manufacturing technology, and more specifically, to a mining explosion-proof intrinsically safe combined power control box. Background Technology

[0002] Underground belt conveyors are gradually being controlled by frequency converters to balance speed and power. In addition to frequency converters, multi-circuit electromagnetic starters are also needed to control equipment such as oil pumps, brakes, tensioners, and cooling fans. They also need belt speed control, temperature control, smoke control, deviation control, slippage control, coal pile-up control, tear control, water spraying control, interlocking functions, and voice control along the line.

[0003] The closest existing technology is disclosed in application publication number CN106330001A, "Explosion-proof Variable Frequency Control Box," which proposes an explosion-proof variable frequency control box, including a box body, an explosion-proof main cavity inside the box body, a variable frequency drive (VFD) inside the main cavity, a switch door on the box body, a speed controller and a starter on the switch door, the speed controller and starter being connected to the VFD, and a control motor at the bottom of the box body, with the VFD connected to the control motor.

[0004] The use and maintenance of existing explosion-proof frequency converters for belt conveyors are still not convenient enough, and their safety cannot meet current needs.

[0005] In view of this, this utility model proposes a mining explosion-proof intrinsically safe combined power control box that is easy to maintain and use, occupies a small area. Utility Model Content

[0006] The purpose of this utility model is to provide a mining explosion-proof intrinsically safe combined power control box that is easy to maintain and use, occupies a small area.

[0007] An intrinsically safe explosion-proof combined power control box for mining includes an explosion-proof enclosure 1 and an intrinsically safe control unit 2. The explosion-proof enclosure 1 is divided by a partition into an inlet cavity 3, a disconnector switch cavity 4, a control cavity 5, a main cavity 6, and an outlet cavity 7. The inlet cavity 3 has a horn inlet 31 at its input end, and the outlet cavity 7 has a horn outlet 71 at its output end. The disconnector switch cavity 4 contains a vacuum disconnector switch. The control cavity 5 contains a control circuit unit. The main cavity 6 contains a frequency converter power unit 61, and a water-cooling heat dissipation unit 62 is located outside the frequency converter power unit 61. The outlet cavity 3 has a horn outlet 71 at its output end. The intrinsically safe control unit 2 is located outside the explosion-proof enclosure 1. The intrinsically safe control unit 2 is electrically connected to the water-cooling heat dissipation unit 62, the control circuit unit, the frequency converter power unit 61, and the external conveyor belt. The intrinsically safe control unit 2 is used to control the control circuit unit, the frequency converter power unit 61, and the external conveyor belt.

[0008] Furthermore, the control circuit unit includes a starter unit 51, a transformer unit 52, and a power supply unit 53. The power supply unit 53 is connected to the intrinsically safe control unit 2 and is used to provide power to the intrinsically safe control unit 2. The wiring harness is connected to the vacuum isolation phase switch through the horn inlet 31. The vacuum isolation phase switch is connected to the frequency converter power unit 61 and the starter unit 51 respectively. The transformer unit 52 is connected between the vacuum isolation phase switch and the starter unit 51.

[0009] Furthermore, a reactor unit 54 and a contactor unit are also connected between the vacuum isolation phase-changing switch and the frequency conversion power unit 61.

[0010] In some embodiments, an auxiliary support and handling unit 63 is also provided on the outside of the frequency converter power unit 61. The auxiliary support and handling unit 63 is rotatably provided on the inside of the main cavity 6 near the outside of the frequency converter power unit 61. The auxiliary support and handling unit 63 is used to provide an auxiliary platform for the frequency converter power unit 61 during transportation to facilitate the loading and unloading of the frequency converter power unit 61.

[0011] Furthermore, the auxiliary support and handling unit 63 includes a first mounting base 631, a first rotating shaft 632, an auxiliary sliding support platform 633, a telescopic ring fixing member 634, and an auxiliary support leg 635. Fixing ports 64 are provided on both sides of the inner side of the main cavity 6 near the frequency converter power unit 61. The first mounting base 631 is provided on the inner side of the main cavity 6 near the outer side of the frequency converter power unit 61. The auxiliary sliding support platform 633 is rotatably connected to the first mounting base 631 via the first rotating shaft 632. A telescopic ring fixing member 634 is provided on both outer sides below the auxiliary sliding support platform 633, and each telescopic ring fixing member 634 is correspondingly connected to the fixing port 64. An auxiliary support leg 635 is provided below the end of the auxiliary sliding support platform 633 away from the frequency converter power unit 61, and the auxiliary support leg 635 is rotatably connected to the auxiliary sliding support platform 633 via a connector.

[0012] Furthermore, the telescopic pull ring fixing component 634 includes a pull ring 6341, an elastic connector, a fixing post, and a second mounting base 6342. A second mounting base 6342 is provided on both outer sides below the auxiliary sliding support platform 633. A pull ring 6341 is provided at the end of the second mounting base 6342 away from the fixing socket 64. A fixing post is provided inside the second mounting base 6342. One end of the fixing post is connected to the pull ring 6341 through the elastic connector, and the other end of the fixing post is correspondingly connected to the fixing socket 64.

[0013] In some embodiments, the variable frequency power unit 61 includes a variable frequency drive 65, a support frame 66, and a first screw. The support frame 66 is spaced apart inside the main cavity 6. A slide rail 67 is provided on both sides above the support frame 66. The bottom of the variable frequency drive 65 is provided with pulleys spaced apart. The variable frequency drive 65 is connected to the slide rail 67 through the pulleys. The variable frequency drive 65 is fixedly connected to the support frame 66 through the first screw, which is used to fix the variable frequency drive 65.

[0014] Furthermore, a second screw is provided between the frequency converter 65 and the support frame 66. The length of the second screw is greater than that of the first screw. The second screw is used to rotate towards the support frame 66 so that the frequency converter 65 moves away from the support frame 66, which facilitates the removal and assembly of the frequency converter 65.

[0015] The beneficial effects of this utility model are as follows: This utility model proposes a mine explosion-proof intrinsically safe combined power control box, including an explosion-proof box 1, an intrinsically safe control unit 2, a control circuit unit in the control cavity 5, a frequency converter power unit 61 in the main cavity 6, a water-cooled heat dissipation unit 62 on the outside of the frequency converter power unit 61, and an auxiliary support and handling unit 63 on the outside of the frequency converter power unit 61. The auxiliary support and handling unit 63 is used to provide an auxiliary platform for the frequency converter power unit 61 during handling, which facilitates the loading, unloading and maintenance of the frequency converter power unit 61. By integrating the frequency converter power unit 61, the starter unit 51 and the intrinsically safe control unit 2, the footprint is reduced, the speed and power balance of multiple frequency converters is achieved, the heavy-load soft start under various load conditions is met, and the needs of underground equipment are met. Attached Figure Description

[0016] Figure 1 This is a structural schematic diagram of a mine explosion-proof intrinsically safe combined power control box according to this application.

[0017] Figure 2 This is a structural schematic diagram of a mine explosion-proof intrinsically safe combined power control box according to this application.

[0018] Figure 3 This is a structural schematic diagram of a mine explosion-proof intrinsically safe combined power control box according to this application.

[0019] Figure 4 This is a structural schematic diagram of a mine explosion-proof intrinsically safe combined power control box according to this application.

[0020] Explanation of main component symbols

[0021] Explosion-proof enclosure 1, intrinsically safe control unit 2, inlet cavity 3, horn inlet 31, disconnector switch cavity 4, control cavity 5, starter unit 51, transformer unit 52, power supply unit 53, reactor unit 54, main cavity 6, frequency converter power unit 61, water cooling heat dissipation unit 62, auxiliary support and handling unit 63, first mounting base 631, first rotating shaft 632, auxiliary sliding support platform 633, telescopic pull ring fixing piece 634, pull ring 6341, second mounting base 6342, auxiliary support leg 635, fixed socket 64, frequency converter mechanism 65, support frame 66, slide rail 67, outlet cavity 7, horn outlet 71.

[0022] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this utility model. Detailed Implementation

[0023] 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.

[0024] 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).

[0025] 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.

[0026] Example 1:

[0027] like Figure 1 The diagram shown is a structural schematic of a mine explosion-proof intrinsically safe combined power control box according to this application; Figure 2 The diagram shown is a structural schematic of a mine explosion-proof intrinsically safe combined power control box according to this application; Figure 3 The diagram shown is a structural schematic of a mine explosion-proof intrinsically safe combined power control box according to this application; Figure 4 The diagram shown is a structural schematic of a mine explosion-proof intrinsically safe combined power control box according to this application.

[0028] An intrinsically safe explosion-proof combined power control box for mining includes an explosion-proof enclosure 1 and an intrinsically safe control unit 2. The explosion-proof enclosure 1 is divided by a partition into an inlet cavity 3, a disconnector switch cavity 4, a control cavity 5, a main cavity 6, and an outlet cavity 7. The inlet cavity 3 has a horn inlet 31 at its input end, and the outlet cavity 7 has a horn outlet 71 at its output end. The disconnector switch cavity 4 contains a vacuum disconnector switch. The control cavity 5 contains a control circuit unit. The main cavity 6 contains a frequency converter power unit 61, and a water-cooling heat dissipation unit 62 is located outside the frequency converter power unit 61. The outlet cavity 3 has a horn outlet 71 at its output end. The intrinsically safe control unit 2 is located outside the explosion-proof enclosure 1. The intrinsically safe control unit 2 is electrically connected to the water-cooling heat dissipation unit 62, the control circuit unit, the frequency converter power unit 61, and the external conveyor belt. The intrinsically safe control unit 2 is used to control the control circuit unit, the frequency converter power unit 61, and the external conveyor belt.

[0029] The control circuit unit includes a starter unit 51, a transformer unit 52, and a power supply unit 53. The power supply unit 53 is connected to the intrinsically safe control unit 2 and is used to provide power to the intrinsically safe control unit 2. The wiring harness is connected to the vacuum isolation phase switch through the horn inlet 31. The vacuum isolation phase switch is connected to the frequency converter power unit 61 and the starter unit 51 respectively. The transformer unit 52 is connected between the vacuum isolation phase switch and the starter unit 51.

[0030] A reactor unit 54 and a contactor unit are also connected between the vacuum isolation phase-changing switch and the frequency conversion power unit 61.

[0031] An auxiliary support and handling unit 63 is also provided on the outside of the frequency converter power unit 61. The auxiliary support and handling unit 63 is rotatably provided on the inner side of the main cavity 6 near the outside of the frequency converter power unit 61. The auxiliary support and handling unit 63 is used to provide an auxiliary platform for the frequency converter power unit 61 during transportation to facilitate the loading and unloading of the frequency converter power unit 61.

[0032] The auxiliary support and handling unit 63 includes a first mounting base 631, a first rotating shaft 632, an auxiliary sliding support platform 633, a telescopic pull ring fixing member 634, and an auxiliary support leg 635. Fixing ports 64 are provided on both sides of the inner side of the main cavity 6 near the frequency converter power unit 61. The first mounting base 631 is provided on the outer side of the inner side of the main cavity 6 near the frequency converter power unit 61. The auxiliary sliding support platform 633 is rotatably connected to the first mounting base 631 via the first rotating shaft 632. A telescopic pull ring fixing member 634 is provided on both outer sides below the auxiliary sliding support platform 633, and each telescopic pull ring fixing member 634 is correspondingly connected to the fixing port 64. An auxiliary support leg 635 is provided below the end of the auxiliary sliding support platform 633 away from the frequency converter power unit 61, and the auxiliary support leg 635 is rotatably connected to the auxiliary sliding support platform 633 via a connector.

[0033] The telescopic pull ring fixing component 634 includes a pull ring 6341, an elastic connector, a fixing post, and a second mounting base 6342. A second mounting base 6342 is provided on both outer sides below the auxiliary sliding support platform 633. A pull ring 6341 is provided at the end of the second mounting base 6342 away from the fixing socket 64. A fixing post is provided inside the second mounting base 6342. One end of the fixing post is connected to the pull ring 6341 through the elastic connector, and the other end of the fixing post is correspondingly connected to the fixing socket 64.

[0034] The variable frequency power unit 61 includes a variable frequency drive 65, a support frame 66, and a first screw. The support frame 66 is spaced apart inside the main cavity 6. A slide rail 67 is provided on both sides above the support frame 66. The bottom of the variable frequency drive 65 is provided with pulleys spaced apart. The variable frequency drive 65 is connected to the slide rail 67 through the pulleys. The variable frequency drive 65 is fixedly connected to the support frame 66 through the first screw, which is used to fix the variable frequency drive 65.

[0035] A second screw is provided between the frequency converter 65 and the support frame 66. The length of the second screw is greater than that of the first screw. The second screw is used to rotate towards the support frame 66 so that the frequency converter 65 moves away from the support frame 66, which facilitates the removal and assembly of the frequency converter 65.

[0036] The beneficial effects of this utility model are as follows: This utility model proposes a mine explosion-proof intrinsically safe combined power control box, including an explosion-proof box 1, an intrinsically safe control unit 2, a control circuit unit in the control cavity 5, a frequency converter power unit 61 in the main cavity 6, a water-cooled heat dissipation unit 62 on the outside of the frequency converter power unit 61, and an auxiliary support and handling unit 63 on the outside of the frequency converter power unit 61. The auxiliary support and handling unit 63 is used to provide an auxiliary platform for the frequency converter power unit 61 during handling, which facilitates the loading, unloading and maintenance of the frequency converter power unit 61. By integrating the frequency converter power unit 61, the starter unit 51 and the intrinsically safe control unit 2, the footprint is reduced, the speed and power balance of multiple frequency converters is achieved, the heavy-load soft start under various load conditions is met, and the needs of underground equipment are met.

[0037] 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 intrinsically safe combined power control box, comprising an explosion-proof enclosure (1) and an intrinsically safe control unit (2), characterized in that: The explosion-proof enclosure (1) is divided into an inlet cavity (3), an isolating switch cavity (4), a control cavity (5), a main cavity (6), and an outlet cavity (7) by a partition. The inlet cavity (3) is provided with a horn inlet (31) at the input end, and the outlet cavity (7) is provided with a horn outlet (71) at the output end. The isolating switch cavity (4) is provided with a vacuum isolating phase-changing switch. The control cavity (5) is provided with a control circuit unit. The main cavity (6) is provided with a frequency converter power unit (61). The frequency converter power unit (61) is provided with a water-cooled heat dissipation unit (62) on the outside. The inlet cavity (3) is provided with a horn outlet (71) at the output end. The explosion-proof enclosure (1) is provided with an intrinsically safe control unit (2) on the outside. The intrinsically safe control unit (2) is electrically connected to the water-cooled heat dissipation unit (62), the control circuit unit, the frequency converter power unit (61), and the external belt conveyor. The intrinsically safe control unit (2) is used to control the control circuit unit, the frequency converter power unit (61), and the external belt conveyor.

2. The intrinsically safe explosion-proof combined power control box for mining as described in claim 1, characterized in that: The control circuit unit includes a starter unit (51), a transformer unit (52), and a power supply unit (53). The power supply unit (53) is connected to the intrinsically safe control unit (2) and is used to provide power to the intrinsically safe control unit (2). The wiring harness is connected to the vacuum isolation phase switch through the horn inlet (31). The vacuum isolation phase switch is connected to the frequency converter power unit (61) and the starter unit (51) respectively. The transformer unit (52) is connected between the vacuum isolation phase switch and the starter unit (51).

3. The intrinsically safe explosion-proof combined power control box for mining as described in claim 2, characterized in that: A reactor unit (54) and a contactor unit are also connected between the vacuum isolation phase-changing switch and the frequency converter power unit (61).

4. The intrinsically safe explosion-proof combined power control box for mining as described in claim 1, characterized in that: An auxiliary support and handling unit (63) is also provided on the outside of the variable frequency power unit (61). The auxiliary support and handling unit (63) is rotatably provided on the inner side of the main cavity (6) near the outside of the variable frequency power unit (61). The auxiliary support and handling unit (63) is used to provide an auxiliary platform for the variable frequency power unit (61) during transportation to facilitate the loading and unloading of the variable frequency power unit (61).

5. The intrinsically safe explosion-proof combined power control box for mining as described in claim 4, characterized in that: The auxiliary support and handling unit (63) includes a first mounting base (631), a first rotating shaft (632), an auxiliary sliding support platform (633), a telescopic ring fixing component (634), and an auxiliary support foot (635). The two sides of the inner side of the main cavity (6) are provided with fixing ports (64) near the variable frequency power unit (61). The first mounting base (631) is provided on the inner side of the main cavity (6) near the outer side of the variable frequency power unit (61). The auxiliary sliding support platform (633) is rotatably connected to the first mounting base (631) through the first rotating shaft (632). A telescopic ring fixing component (634) is provided on both outer sides below the auxiliary sliding support platform (633). Each telescopic ring fixing component (634) is correspondingly connected to the fixing port (64). An auxiliary support foot (635) is provided below the end of the auxiliary sliding support platform (633) away from the variable frequency power unit (61). The auxiliary support foot (635) is rotatably connected to the auxiliary sliding support platform (633) through a connector.

6. The intrinsically safe explosion-proof combined power control box for mining as described in claim 5, characterized in that: The telescopic pull ring fixing component (634) includes a pull ring (6341), an elastic connector, a fixing post, and a second mounting base (6342). A second mounting base (6342) is provided on both outer sides below the auxiliary sliding support platform (633). A pull ring (6341) is provided at the end of the second mounting base (6342) away from the fixing socket (64). A fixing post is provided inside the second mounting base (6342). One end of the fixing post is connected to the pull ring (6341) through the elastic connector, and the other end of the fixing post is correspondingly connected to the fixing socket (64).

7. The intrinsically safe explosion-proof combined power control box for mining as described in claim 1, characterized in that: The variable frequency power unit (61) includes a variable frequency drive (65), a support frame (66), and a first screw. The support frame (66) is spaced apart inside the main cavity (6). A slide rail (67) is provided on both sides above the support frame (66). The bottom of the variable frequency drive (65) is provided with pulleys spaced apart. The variable frequency drive (65) is connected to the slide rail (67) through the pulleys. The variable frequency drive (65) is fixedly connected to the support frame (66) through the first screw. The first screw is used to fix the variable frequency drive (65).

8. The intrinsically safe explosion-proof combined power control box for mining as described in claim 7, characterized in that: A second screw is provided between the frequency converter core (65) and the support frame (66). The length of the second screw is greater than that of the first screw. The second screw is used to rotate towards the support frame (66) so that the frequency converter core (65) moves away from the support frame (66) to facilitate the removal and disassembly of the frequency converter core (65).

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