Explosion-proof frequency converter device easy to maintain

Abstract

The explosion-proof frequency converter device easy to maintain comprises an explosion-proof shell reactor, a rectification assembly, a capacitor assembly, an inversion assembly and a machine core, and is characterized in that a water cooling door is arranged on the front wall of an explosion-proof shell, a cooling water channel is arranged in the water cooling door, and the rectification assembly, the capacitor assembly and the inversion assembly are fixed on the inner surface of a water cooling plate from bottom to top. The machine core is fixed above the rectification assembly, and the electric reactor is fixed in the explosion-proof shell; and an intrinsic safety man-machine interaction screen is arranged on the front wall of the explosion-proof shell. The explosion-proof frequency converter device easy to maintain is suitable for being used in a dark coal mine with a narrow space, and the explosion-proof frequency converter is convenient to overhaul, maintain and maintain. Through the arrangement of the maintenance side door, after the maintenance side door is opened and a machine core cable is unloaded, the water cooling door is opened to maintain quick-wear parts such as an IGBT, a rectifier bridge, a fusible core and the like. By arranging the intrinsic safety man-machine interaction screen, an anti-explosion keyboard is omitted, and man-machine interaction is more convenient.

Description

Technical Field

[0001] The utility model relates to a frequency converter device, and more specifically, to an easy-to-maintain explosion-proof frequency converter device. Background Art

[0002] The voltage levels of underground power supply in coal mines are divided into 10kV, 6kV, 3.3kV, 1140V, 660V, and 127V. At present, most of the variable frequency speed regulating devices used underground are 660V, 1140V, and 3300V voltage levels. The explosion-proof inverter with a voltage level of 1140V and a power of 1000kW, as the equipment with the largest power in the mainstream voltage level of 1140V in coal mines, plays an irreplaceable role in coal mines. It is difficult to transport, repair, and maintain equipment underground in coal mines, which requires that the size of explosion-proof equipment should not be too large. The length of products on the market is mostly controlled within 2500mm. The space underground in coal mines is limited, narrow, and dim, and it is difficult to maintain equipment. Especially when the movement is damaged, it takes a lot of time to repair, which affects coal mine production. This requires that the explosion-proof inverter should have a smaller size and should be easy to maintain.

[0003] At present, most explosion-proof inverters on the market use ordinary screens and explosion-proof keyboards for human-computer interaction. The explosion-proof keyboard is inconvenient to operate, and the ordinary screen requires explosion-proof glass and other structural parts to achieve explosion-proof, and the structure is complicated. At the same time, the cooling methods of explosion-proof inverters are divided into air cooling and water cooling. Water cooling has good efficiency, high efficiency, and low equipment noise. Foreign advanced inverter manufacturers all use water cooling. Due to technical difficulties such as scaling and condensation in water cooling, many domestic products are still using practical heat pipe natural cooling, and the equipment power is small, and there are no high-power products. Summary of the invention

[0004] In order to overcome the disadvantages of the above technical problems, the utility model provides an easy-to-maintain explosion-proof frequency converter device.

[0005] The utility model discloses an easy-to-maintain explosion-proof frequency converter device, comprising an explosion-proof shell and a reactor, a rectifier assembly, a capacitor assembly, an inverter assembly and a movement arranged in the explosion-proof shell, wherein the movement is used to control the operation of the frequency converter; the utility model is characterized in that: a water-cooling door is arranged on the front wall of the explosion-proof shell, a cooling water channel is arranged in the water-cooling door, and a water inlet joint and a water outlet joint communicating with two ends of the cooling water channel are fixed on the outer surface of the water-cooling door; the rectifier assembly, the capacitor assembly and the inverter assembly are fixed on the inner surface of the water-cooling plate from bottom to top, the movement is fixed above the rectifier assembly, and the reactor is fixed in the explosion-proof shell; an intrinsically safe human-machine interaction screen is arranged on the front wall of the explosion-proof shell.

[0006] The utility model discloses an easy-to-maintain explosion-proof frequency converter device. The rear wall of the explosion-proof housing is a corrugated plate. An axial flow fan for air-cooling and dissipating heat for the reactor is arranged in the inner cavity of the explosion-proof housing above the reactor.

[0007] The utility model discloses an easy-to-maintain explosion-proof frequency converter device, wherein the reactor comprises an input electric controller, a feedback reactor and an output reactor, and the peripheries of the input reactor, the feedback reactor and the output inductor are all provided with heat insulation plates to prevent heat from being transferred to the movement.

[0008] The utility model discloses an easy-to-maintain explosion-proof frequency converter device, wherein a maintenance side door is arranged on a side wall of the explosion-proof housing close to the machine core.

[0009] The utility model discloses an easy-to-maintain explosion-proof frequency converter device, wherein the intrinsically safe human-machine interactive screen is connected to the movement by signals via a through-wall terminal, a rotatable protective cover is arranged on the outside of the intrinsically safe human-machine interactive screen, and a sealing gasket for sealing is arranged on the periphery of the intrinsically safe human-machine interactive screen.

[0010] The utility model provides an easy-to-maintain explosion-proof inverter device, wherein the capacitor assembly is provided with a capacitor stacked busbar, the inverter assembly is provided with an IGBT stacked busbar, and the capacitor stacked busbar and the IGBT stacked busbar are located in the same plane.

[0011] The utility model discloses an easy-to-maintain explosion-proof inverter device, wherein the input end of the rectifier component is connected to an input busbar, the output of the rectifier component is connected to both a capacitor stacked busbar and an IGBT stacked busbar, the output end of the inverter component is connected to an output busbar, and a current sensor is arranged on the periphery of the output busbar.

[0012] The utility model discloses an easy-to-maintain explosion-proof frequency converter device, wherein a lower support plate is arranged above the inverter assembly, an upper support plate, a drive plate, a terminal block and a 24V switching power supply are arranged on the lower support plate, and a main control plate and a voltage attenuation plate are arranged on the upper support plate.

[0013] The beneficial effects of the utility model are as follows: the easy-to-maintain explosion-proof inverter device of the utility model has a water-cooling door on the front wall of the explosion-proof shell, a cooling water channel is arranged in the water-cooling door, an inlet and outlet water joints connected to the cooling water channel are fixed on the outer surface of the water-cooling door, a rectifier assembly, a capacitor assembly and an inverter assembly are fixed on the inner surface of the water-cooling door in sequence from bottom to top, a movement is fixed above the rectifier assembly, and a reactor is arranged in the inner cavity of the explosion-proof shell; it can be seen that the layout of the water-cooling door, the reactor, the rectifier assembly, the capacitor assembly, the inverter assembly and the movement makes full use of the internal structure in the explosion-proof shell, so that the formed explosion-proof inverter device has a smaller volume, making it suitable for use in coal mines with narrow and dim spaces, and is convenient for the inspection, maintenance and maintenance of the explosion-proof inverter; at the same time, external deionized water flows in the cooling water channel through the inlet and outlet water joints, realizes the heat dissipation of the rectifier assembly and the inverter assembly on the water-cooling door, solves the problem of water cooling scaling, and ensures that the explosion-proof shell meets the explosion-proof requirements.

[0014] Furthermore, by providing a maintenance side door on the side wall of the explosion-proof housing, after opening the maintenance side door and untying the movement cable, the water-cooling door can be opened to inspect the IGBT, rectifier bridge, fuse and other vulnerable parts.

[0015] Furthermore, the capacitor stacked busbars on the capacitor assembly and the IGBT stacked busbars on the inverter assembly are located in the same plane, so that the lead inductance is small.

[0016] Furthermore, an axial flow fan is arranged above the reactor in the explosion-proof housing. The heat generated during the operation of the reactor is blown onto the corrugated plate at the rear of the explosion-proof housing by the axial flow fan, and then conducted to the outside of the housing through the corrugated plate, so that the heat generated by the reactor has the least effect on the movement.

[0017] Furthermore, by setting an intrinsically safe human-machine interaction screen on the front wall of the explosion-proof shell, the explosion-proof keyboard is omitted, making human-machine interaction more convenient and able to display more equipment data. Human-machine interaction can be achieved using the intrinsically safe human-machine interaction screen, making operation more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a front view of the easy-to-maintain explosion-proof inverter device of the utility model;

[0019] Figure 2 This is a rear view of the easy-to-maintain explosion-proof inverter device of the utility model;

[0020] Figure 3 , Figure 4 They are all three-dimensional diagrams of the easy-to-maintain explosion-proof inverter device of the utility model;

[0021] Figure 5 This is the front view of the water cooling door in the utility model;

[0022] Figure 6 It is a three-dimensional diagram of the water cooling door in the utility model;

[0023] Figure 7 It is a cross-sectional view of the water cooling door in the utility model;

[0024] Figure 8 It is a three-dimensional diagram of the capacitor assembly in the utility model;

[0025] Fig. 9 It is a three-dimensional diagram of the reactor in the utility model;

[0026] Fig.10 It is a partial schematic diagram of the water cooling door in the utility model.

[0027] In the figure: 1 explosion-proof shell, 2 water cooling door, 3 movement, 4 capacitor assembly, 5 inverter assembly, 6 input inductor, 7 feedback inductor, 8 output inductor, 9 axial flow fan, 10 intrinsically safe human-machine interaction screen, 11 maintenance side door, 12 water inlet joint, 13 water outlet joint, 14 bottom beam, 15 forklift hole, 16 lifting ring, 17 cooling water channel, 18 spoiler, 19 rectifier assembly, 20 input busbar, 21 capacitor stacked busbar, 22 filter capacitor, 23 capacitor group box, 24 IGBT stacked busbar, 25 output busbar, 26 current sensor, 27 lower support plate, 28 drive board, 29 terminal block, 30 upper support plate, 31 main control board, 32 voltage attenuation board, 33 24V switching power supply, 34 heat insulation board, 35 corrugated board. DETAILED DESCRIPTION

[0028] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0029] like Figure 1 and Figure 2 As shown, the front view and rear view of the easy-to-maintain explosion-proof inverter device of the utility model are respectively given. Figure 3 and Figure 4 The three-dimensional diagrams are given. The easy-to-maintain explosion-proof inverter device shown is composed of an explosion-proof housing 1, a water-cooled door 2, a movement 3, a rectifier assembly 19, a capacitor assembly 4, an inverter assembly 5 and a reactor. The interior of the explosion-proof housing 1 is a cavity. The water-cooled door 2 is arranged on the front wall of the explosion-proof housing 1. The explosion-proof housing 1 and the water-cooled door 2 both meet the explosion-proof requirements. The reactor is arranged in the internal cavity of the explosion-proof housing 1. A cooling water channel 17 is arranged in the water-cooled plate 2. A water inlet joint 12 and a water outlet joint 13 connected to the two ends of the cooling water channel 17 are arranged on the outer surface of the water-cooled plate 2. The deionized water supplied from the outside enters the cooling water channel 17 through the water inlet joint 12 and flows out through the water outlet joint 13.

[0030] The rectifier assembly 19, capacitor assembly 4 and inverter assembly 5 are fixed on the inner surface of the water-cooled door 2 from bottom to top, and the movement 3 is fixed on the outside of the rectifier assembly 19. The movement 3 is used to control the operation of the explosion-proof inverter. An intrinsically safe human-machine interaction screen 10 is arranged on the front wall of the explosion-proof housing 1. Compared with the existing keyboard operation, the intrinsically safe human-machine interaction screen 10 realizes human-machine interaction and can also display more information.

[0031] The utility model is an easy-to-maintain explosion-proof inverter device. The explosion-proof housing 1 is provided with a water-cooled door 2. The capacitor assembly 4, the rectifier assembly 19, the inverter assembly 5 and the movement 3 are fixed on the water-cooled door 2. The reactor is fixed on the explosion-proof housing 1 in this way, which makes each part very compact. The explosion-proof inverter device formed has a small volume, which is convenient for transportation and security in coal mines with narrow spaces, and is also convenient for later maintenance, inspection and maintenance. The water-cooled door 2 adopts an external deionized water cooling method to ensure the explosion-proof requirements of the water-cooled door 2. At the same time, the deionized water flowing in the water-cooled door 2 can take away the heat generated during the operation of the rectifier diode in the rectifier assembly 19 and the IGBT device in the inverter assembly 5, ensuring the long-term stable operation of the explosion-proof inverter.

[0032] The rear wall of the explosion-proof housing 1 is a corrugated plate 35. The reactor includes an input reactor 6, an output reactor 8 and a feedback reactor 7. Two axial flow fans 9 are arranged in the inner cavity of the explosion-proof housing 1 above the input reactor 6, the output reactor 8 and the feedback reactor 7. The axial flow fans 9 realize the heat dissipation of the reactor. The heat generated by the reactor during operation is blown onto the corrugated plate 35 at the rear of the explosion-proof housing 1 by the axial flow fans 9, and then conducted to the outside of the explosion-proof housing 1 through the corrugated plate, so that the heat generated by the reactor has the least effect on the movement 3. Fig. 9 As shown, a three-dimensional diagram of the reactor in the utility model is given, and a heat insulation plate 34 is arranged on the periphery of the reactor, thereby further preventing the heat generated during the operation of the input reactor 6, the output reactor 8 and the feedback reactor 7 from being transferred to the movement 3.

[0033] The side wall of the explosion-proof housing 1 near the movement 3 is provided with a maintenance side door 11. After opening the maintenance side door 11 and untying the movement cable, the water-cooling door 2 can be opened to inspect the IGBT, rectifier bridge, fuse and other vulnerable parts. The intrinsically safe human-machine interaction screen 10 is connected to the movement 3 via the through-wall terminal. The outside of the intrinsically safe human-machine interaction screen 10 is provided with a rotatable protective cover. The periphery of the intrinsically safe human-machine interaction screen is provided with a sealing gasket for sealing. The intrinsically safe human-machine interaction screen 10 makes human-machine interaction more convenient, can display more equipment data, and is more convenient to operate.

[0034] like Figure 5 As shown, a front view of the water-cooled door 2 of the utility model is given, in which an S-shaped cooling water channel 17 is provided, and a spoiler 18 is provided in the cooling water channel 17. The lower end and the upper end of the cooling water channel 17 are respectively connected to the water inlet joint 12 and the water outlet joint 13. The cooling water channel 17 and the spoiler 18 are formed by milling on a steel plate, and then a sealing plate is welded on the milled cooling water channel 17 and the spoiler 18 to form the water-cooled door 2.

[0035] like Figure 6 and Figure 7 As shown, a three-dimensional view and a cross-sectional view of the water-cooled door 2 of the utility model are respectively given. The rectifier assembly 19, the capacitor assembly 4 and the inverter assembly 5 are fixed on the inner surface of the water-cooled plate 2 from bottom to top in sequence. The upper part of the rectifier assembly 19 is the movement 3. The input end of the rectifier assembly 19 is connected to the input busbar 20. The rectifier device in the rectifier assembly 19 rectifies the input AC power into DC power, and the inverter assembly 5 converts the DC power into the required AC power. Figure 8 As shown, a three-dimensional diagram of the capacitor assembly in the utility model is given, and the capacitor assembly 4 shown is composed of a capacitor stacked busbar 21, a filter capacitor 22 and a capacitor group box 23. The inverter assembly 5 is provided with an IGBT stacked busbar 24 and an output busbar 25. The IGBT device in the inverter assembly 5 converts the input DC power into AC power and outputs it through the output busbar 25.

[0036] like Fig.10 As shown, a partial schematic diagram of the water-cooled door in the utility model is given, and the capacitor stacked busbar 21 and the IGBT stacked busbar 24 are located in the same plane, so that the lead inductance is small. The output of the rectifier component 4 is connected to both the capacitor component 4 and the inverter component 5. The periphery of the output busbar 25 is provided with a current sensor 26 to detect the output current.

[0037] Figure 6 In the figure, a lower support plate 27 is arranged above the current sensor 26, and an upper support plate 30, a driving plate 28, a terminal block 29 and a 24V switching power supply 33 are fixed on the lower support plate 27. The driving plate 28 is used to control the operation of the inverter assembly 5. A main control board 31 and a voltage attenuation board 32 are arranged on the upper support plate 30.

[0038] In order to facilitate the transportation and installation of the explosion-proof inverter, two parallel bottom beams 14 are fixed on the lower surface of the explosion-proof housing 1, and forklift holes 15 are opened on the bottom beam 14 to facilitate installation by forklift. Lifting rings 16 are fixed on the four corners of the upper surface of the explosion-proof housing 1 to facilitate the lifting of the explosion-proof inverter.

Claims

1. An easy-to-maintain explosion-proof frequency converter device, comprising an explosion-proof housing (1) and a reactor, a rectifier component (19), a capacitor component (4), an inverter component (5) and a movement (3) arranged in the explosion-proof housing, wherein the movement is used to control the operation of the frequency converter; characterized in that: A water cooling door (2) is arranged on the front wall of the explosion-proof housing, a cooling water channel (17) is arranged in the water cooling door, and a water inlet joint (12) and a water outlet joint (13) communicating with both ends of the cooling water channel are fixed on the outer surface of the water cooling door; the rectifier assembly, the capacitor assembly and the inverter assembly are fixed on the inner surface of the water cooling plate from bottom to top, the movement is fixed above the rectifier assembly, and the reactor is fixed in the explosion-proof housing; and an intrinsically safe human-machine interaction screen (10) is arranged on the front wall of the explosion-proof housing.

2. The easy-to-maintain explosion-proof inverter device according to claim 1, characterized in that: The rear wall of the explosion-proof housing (1) is a corrugated plate (35), and an axial flow fan (9) for air cooling and heat dissipation of the reactor is arranged in the inner cavity of the explosion-proof housing above the reactor.

3. The easy-to-maintain explosion-proof inverter device according to claim 1 or 2, characterized in that: The reactor comprises an input electric controller (6), a feedback reactor (7) and an output reactor (8), and the peripheries of the input reactor, the feedback reactor and the output inductor are all provided with heat insulation plates (34) for preventing heat from being transferred to the movement (3).

4. The easy-to-maintain explosion-proof inverter device according to claim 1 or 2, characterized in that: A maintenance side door (11) is provided on a side wall of the explosion-proof housing (1) close to the movement (3).

5. The easy-to-maintain explosion-proof inverter device according to claim 1 or 2, characterized in that: The intrinsically safe human-machine interactive screen (10) is connected to the movement (3) by signals via a through-wall terminal. A rotatable protective cover is provided on the outside of the intrinsically safe human-machine interactive screen. A sealing gasket is provided on the periphery of the intrinsically safe human-machine interactive screen for sealing.

6. The easy-to-maintain explosion-proof inverter device according to claim 1 or 2, characterized in that: The capacitor assembly (4) is provided with a capacitor stacked busbar (21), and the inverter assembly (5) is provided with an IGBT stacked busbar (24), and the capacitor stacked busbar and the IGBT stacked busbar are located in the same plane.

7. The easy-to-maintain explosion-proof inverter device according to claim 6, characterized in that: The input end of the rectifier component (19) is connected to an input busbar (20), the output of the rectifier component is connected to both the capacitor stacked busbar and the IGBT stacked busbar, the output end of the inverter component (5) is connected to an output busbar (35), and a current sensor (26) is arranged on the periphery of the output busbar.

8. The easy-to-maintain explosion-proof inverter device according to claim 1 or 2, characterized in that: A lower support plate (27) is arranged above the inverter assembly (5), an upper support plate (30), a drive plate (28), a terminal block (29) and a 24V switching power supply (33) are arranged on the lower support plate, and a main control plate (31) and a voltage attenuation plate (32) are arranged on the upper support plate.

Images