Low-voltage explosion-proof SVG water-cooling machine core structure

Abstract

The utility model relates to a low-voltage explosion-proof SVG water-cooling machine core structure, which comprises a water-cooling plate, a capacitor assembly, a rectification part, an inversion part and a master control assembly, and the rectification part and the inversion part are respectively composed of an IGBT power module. The device is characterized in that the input end of the rectification part and the output end of the inversion part are both connected to an under-mine power grid, optical fiber conversion assemblies are arranged above the rectification part and the countercurrent part, and the main control assembly is composed of a bottom plate, a main control board and an optical fiber board, and the main control board is connected with the control ends of the IGBT power modules in the rectification part and the inversion part through the optical fiber board and the optical fiber conversion assembly. According to the low-voltage explosion-proof SVG water-cooling machine core structure, reactive compensation of a power grid under a mine is realized, instantaneous drop of the voltage of the power grid in the starting and stopping process of a coal mine large-scale heading machine is avoided, and normal work of large-scale coal mine mining equipment is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to a SVG core, more specifically, especially, a low pressure explosion -proof SVG water -cooling core structure. BACKGROUND

[0002] With the continuous progress of coal mine equipment, the heavy, large -scale, the continuous increase of the length of the gateway of mining equipment has become the inevitable trend of coal mine production, the start and stop of large -scale tunneling machine have great impact on the mine power grid, cause the voltage of power grid to fall, the power factor decreases, the transmission loss increases. The reduction of power grid voltage will cause the reduction of the voltage at the end of the tunneling machine, which will cause the reduction of the output torque, the overcurrent of the motor and even the failure to start. In addition, the equipment using air cooling for heat dissipation in the mine has large operation noise, and the heat dissipation heat is directly discharged into the roadway or motor chamber, causing the increase of the environmental temperature, causing the working environment of the coal mine workers to be more severe. Therefore, how to avoid the drop of the mine power grid during the start and stop of large -scale mining equipment is the key to solve the problem, therefore, the utility model provides a low pressure explosion -proof SVG water -cooling core structure to compensate the reactive power at the moment of the drop of the mine power grid, improve the voltage at the end of the equipment, and adopt the refrigeration mode of water cooling. SUMMARY

[0003] The utility model discloses in order to overcome the above technical problem's shortcoming, provide a low pressure explosion -proof SVG water -cooling core structure.

[0004] The low pressure explosion -proof SVG water -cooling core structure of the utility model, including water -cooling plate, capacitor component, rectifier portion, inverter portion and main control assembly, capacitor component sets up in the middle part of the heat absorption surface of water -cooling plate, and rectifier portion and inverter portion set up on the heat absorption surface of water -cooling plate on the both sides of capacitor component, and rectifier portion and inverter portion are all by the IGBT power module of fixed on the heat absorption surface of water -cooling plate constitutes, and main control assembly sets up in the top of capacitor component and inverter portion, its characterized in that: the input end of rectifier portion and the output end of inverter portion are all connected on the mine power grid, and the output end of rectifier portion and the input end of inverter portion are all connected with capacitor component through the layering female row, and the top of rectifier portion and rectifier portion is all provided with fiber conversion assembly, and main control assembly is by the bottom plate and the main control board and fiber board of fixed on the top surface of bottom plate constitute, and the control end of the IGBT power module in main control board and inverter portion is connected with rectifier portion through fiber board and fiber conversion assembly.

[0005] The low pressure explosion -proof SVG water -cooling core structure of the utility model, the heat dissipation water channel that cooling medium flows is provided in the water -cooling plate, and the water inlet and the water outlet that communicate with the both ends of the heat dissipation water channel are provided on the outer surface of the water -cooling plate, and the spoiler that uniformly distributes cooling medium is provided in the heat dissipation water channel.

[0006] The utility model discloses a low pressure explosion -proof SVG water -cooling movement core structure, water -cooling board heat absorption surface middle part is fixed with the middle support, and the water -cooling board heat absorption surface on the both sides of middle support is fixed with left support and right support respectively.

[0007] The utility model discloses a low pressure explosion -proof SVG water -cooling movement core structure, the bottom plate of main control assembly's lower surface is fixed with switching power supply, voltage attenuation instruction board and pulse group suppressor, and the right side of bottom plate is hinged on right support through hinge, and the upper end of middle support supports the left side of bottom plate.

[0008] The utility model discloses a low pressure explosion -proof SVG water -cooling movement core structure, the inside of left support and right support is fixed with the support plate, the optical fiber conversion subassembly is constituted by three signal conversion circuit boards, and signal conversion circuit board is fixed on support plate through steel station column, and the input and output end of signal conversion circuit board is connected with the output end of optical fiber board and the control end of IGBT power module respectively, and signal conversion circuit board converts the optical signal received into the electric signal of control IGBT power module opening or closing.

[0009] The utility model discloses a low pressure explosion -proof SVG water -cooling movement core structure, the outside of left support and right support is fixed with the current sensor that detects respectively input current and output current.

[0010] The utility model discloses a low pressure explosion -proof SVG water -cooling movement core structure, the between IGBT power module is connected through node copper bar, and the connecting pin between IGBT power module and laminated busbar is connected with absorption capacitor in parallel.

[0011] The utility model discloses a low pressure explosion -proof SVG water -cooling movement core structure, and the heat absorption surface one side of water -cooling surface is provided with rectifier part, inverter part, capacitor assembly, main control assembly and optical fiber conversion subassembly, and the IGBT power module of rectifier part and inverter part is fixed on the heat absorption surface of water -cooling board, and the heat of IGBT power module during rectification and inversion is taken away by the cooling medium flowing in water -cooling board, the input end of rectifier part and the output end of inverter part are connected with the mine -down power grid, and the output end of rectifier part and the input end of inverter part are connected with capacitor assembly through laminated busbar, the control end of IGBT power module is connected with the signal conversion circuit board in main control board, optical fiber board and optical fiber conversion subassembly, to control rectification, inversion work of rectifier part and inverter part, and finally realizes the reactive compensation of mine -down power grid, avoids the instantaneous drop of power grid voltage during the start -stop process of coal mine large -scale tunneling machine, and ensures the normal work of large -scale coal mining equipment, and simultaneously, since adopting water -cooling cooling, the heat of water -cooling emission is arranged to non -personnel work area, and will not cause the temperature rise of working environment.

[0012] Further, the middle support is fixed in the middle of the heat absorbing surface of the water cooling plate, the left support and the right support are fixed on the two sides of the middle support, the capacitor assembly is fixed on the middle support, and the optical fiber conversion assembly controlled by the IGBT power module of the rectification part and the inversion part is fixed on the left support and the right support, so that the formed low-voltage explosion-proof SVG water cooling movement structure is very compact, and the miniaturization requirement of the movement can be met.

[0013] Further, the bottom plate of the main control assembly is hingedly connected to the right support, so that the switch power supply, the voltage attenuation indication plate and the pulse group suppressor on the lower surface of the bottom plate can be overhauled and maintained by rotating the bottom plate around the hinge. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a front view of the low-voltage explosion-proof SVG water cooling movement structure of the utility model;

[0015] Figure 2 It is a rear view of the low-voltage explosion-proof SVG water cooling movement structure of the utility model;

[0016] Figure 3 It is a left view of the low-voltage explosion-proof SVG water cooling movement structure of the utility model;

[0017] Figure 4 It is a right view of the low-voltage explosion-proof SVG water cooling movement structure of the utility model;

[0018] Figure 5 It is a top view of the low-voltage explosion-proof SVG water cooling movement structure of the utility model;

[0019] Figure 6 It is a bottom view of the low-voltage explosion-proof SVG water cooling movement structure of the utility model;

[0020] Figure 7 、 Figure 8 All are the perspective view of the low-voltage explosion-proof SVG water cooling movement structure of the utility model;

[0021] Figure 9 It is a perspective view of the main control assembly in the utility model;

[0022] Figure 10 It is a perspective view of the capacitor assembly in the utility model;

[0023] Figure 11 It is a perspective view of the optical fiber conversion assembly in the utility model;

[0024] Figure 12 It is a perspective view of the rectification part and the inversion part in the utility model;

[0025] Figure 13 is a sectional view of the water-cooled plate in the utility model;

[0026] Figure 14 is a circuit principle diagram of the low-voltage explosion-proof SVG water-cooled movement structure of the utility model.

[0027] In the figure: 1 water-cooled plate, 2 capacitor assembly, 3 rectifier part, 4 inverter part, 5 main control assembly, 6 optical fiber conversion assembly, 7 IGBT power module, 8 middle support, 9 left support, 10 right support, 11 signal conversion circuit board, 12 bottom plate, 13 main control board, 14 optical fiber board, 15 hinge, 16 current sensor, 17 absorption capacitor, 18 water inlet interface, 19 water outlet interface, 20 switching power supply, 21 voltage attenuation indication board, 22 pulse group suppressor, 23 thin film capacitor, 24 capacitor mounting sheet metal part, 25 laminated busbar, 26 support plate, 27 steel column, 28 node copper bar, 29 heat dissipation water channel, 30 spoiler. DETAILED DESCRIPTION

[0028] The utility model will be further described below in combination with the drawings and examples.

[0029] As Figures 1 to 6 indicated, the front view, the rear view, the left view, the right view, the top view and the bottom view of the low-voltage explosion-proof SVG water-cooled movement structure of the utility model are respectively given, Figure 7 and Figure 8 its perspective view is given, the low-voltage explosion-proof SVG water-cooled movement structure shown is composed of a water-cooled plate 1, a capacitor assembly 2, a rectifier part 3, an inverter part 4, a main control assembly 5 and an optical fiber conversion assembly 6, the capacitor assembly 2 is arranged at the middle part of the heat absorption surface of the water-cooled plate 1, the rectifier part 3 and the inverter part 4 are respectively arranged at the left and right sides of the capacitor assembly 2, the rectifier part 3 and the inverter part 4 are both composed of an IGBT power module 7, the IGBT power module 7 is fixed on the surface of the heat absorption surface of the water-cooled plate 1 and is coated with heat-conducting silicone grease, the heat generated by the rectification and inversion of the IGBT power module 7 is taken away by the cooling medium flowing in the water-cooled plate 1, so as to maintain the IGBT power module 7 at a suitable working temperature and ensure the stable work of the movement.

[0030] The main control component 5 is positioned above the capacitor assembly 2 and the inverter section 4. The main control component 5 consists of a base plate 12, a main control board 13 mounted on the upper surface of the base plate 12, and an optical fiber board 14. The main control board 13 controls the operation of the SVG water-cooled core. The optical fiber board 14 is connected to the main control board 13 and converts the electrical signals output by the main control board 13 into optical signals. Optical fiber conversion components 6 are positioned above both the rectifier section 3 and the inverter section 4. The input end of the optical fiber conversion component 6 is connected to the output end of the optical fiber board 14 via optical fiber. The output end of the optical fiber conversion component 6 is connected to the control end of the IGBT power module 7. The optical fiber conversion component 6 converts the received optical signals into electrical signals to control the on / off state of the IGBT power module 7.

[0031] The input terminal of rectifier section 3 is connected to the underground power grid. The output terminal of rectifier section 3 and the input terminal of inverter section 4 are both connected to the laminated busbar 25. The copper busbars in the laminated busbar 25 form the positive, negative, and midpoint of the DC bus. Capacitor assembly 2 is connected to the laminated busbar 25. The output terminal of inverter section 4 is also connected to the underground power grid. Thus, under the control of the main control component 5, the rectifier section 3 is controlled to rectify the AC power input from the power grid into DC power and output it to the laminated busbar 25. The inverter section 4 is controlled to convert the DC power on the laminated busbar 2 into AC power and input it to the power grid to achieve reactive power compensation for the underground power grid and avoid instantaneous voltage drops in the power grid during the start-up and shutdown of large coal mining equipment.

[0032] To secure and support the capacitor assembly 2 and the fiber optic conversion assembly 6, a central support 8 is fixed to the middle of the heat-absorbing surface of the water-cooled plate 1. A left support 9 and a right support 10 are fixed to either side of the central support 8. The capacitor assembly 2 is fixed to the central support 8, and the fiber optic conversion assemblies 6 of the rectifier section 3 and the inverter section 4 are fixed to the left support 9 and the right support 10, respectively. The central support 8, left support 9, and right support 10 facilitate the routing of connecting cables and also contribute to the miniaturization of the entire SVG water-cooled core structure.

[0033] like Figure 10 The diagram shows a perspective view of the capacitor assembly of this invention. The capacitor assembly 2 consists of a capacitor mounting sheet metal part 20 and film capacitors 23 fixed on the capacitor mounting sheet metal part 20. There are 12 film capacitors 23, arranged in two groups of six in parallel. The film capacitors 23 are connected to a laminated busbar 25. Figure 11 The figure shows a perspective view of the fiber optic conversion assembly of this utility model. The fiber optic conversion assembly 6 is composed of three signal conversion circuit boards 11. Support plates 26 are fixed on the inner sides of the left bracket 9 and the right bracket 10. The signal conversion circuit boards 11 are fixed on the support plates 26 by steel columns 27.

[0034] like Figure 9As shown in the figure, the bottom plate 12 of the main control assembly 5 is fixed with a switching power supply 20, a voltage attenuation indicating plate 21 and a pulse group suppressor 22 on the lower surface, the power switch 20 is used to provide DC power for the power module in the main control board 13. The right side of the bottom plate 12 is hinged to the right support 10 through the hinge 15, the left side of the bottom plate 12 is located above the middle support 8, and the bottom plate 12 is detachably connected with the middle support 8 through screws. In this way, by turning over the bottom plate 12 around the hinge 15, the switching power supply 20, the voltage attenuation indicating plate 21 and the pulse group suppressor 22 can be checked and repaired.

[0035] As shown in the figure, the cross-sectional view of the water-cooled plate in the utility model is shown, Figure 10 As shown in the figure, the cross-sectional view of the water-cooled plate in the utility model is shown,

[0036] As shown in the figure, the cross-sectional view of the water-cooled plate in the utility model is shown, Figure 12 As shown in the figure, the cross-sectional view of the water-cooled plate in the utility model is shown, Figure 13 The circuit principle diagram of the low-voltage explosion-proof SVG water-cooled machine core structure of the utility model is shown, the rectifier part 3 and the inverter part 4 are both composed of three paths, each path is composed of three IGBT power modules 7 arranged in a triangular shape, and two IGBT devices are packaged in each IGBT power module 7. The two IGBT devices in the upper IGBT power module 7 of the triangular shape are connected at the position of the three-phase power input or output, and the upper IGBT power module 7 is connected with the two IGBT power modules 7 below through the node copper bar 28. The two IGBT power modules 7 below the triangular shape are connected with the positive bus bar, the negative bus bar and the bus bar midpoint in the laminated bus bar 25, so that the three-level output inverter part 4 is formed.

Claims

1. A low-voltage explosion-proof SVG water-cooled movement structure, comprising a water-cooled plate (1), a capacitor assembly (2), a rectifier part (3), an inverter part (4), and a main control assembly (5), the capacitor assembly being arranged at the middle of the heat absorption surface of the water-cooled plate, the rectifier part and the inverter part being arranged on the heat absorption surface of the water-cooled plate on the two sides of the capacitor assembly respectively, the rectifier part and the inverter part each being composed of an IGBT power module (7) fixed on the heat absorption surface of the water-cooled plate; the main control assembly being arranged above the capacitor assembly and the inverter part; characterized in that: The input end of the rectifying part and the output end of the inverting part are connected to the mine power grid, the output end of the rectifying part and the input end of the inverting part are connected to the capacitor assembly (2) through the laminated busbar (25); the rectifying part and the inverting part are provided with the optical fiber conversion assembly (6) above, the main control assembly is composed of the bottom plate (12), the main control board (13) and the optical fiber board (14) fixed on the upper surface of the bottom plate, the main control board is connected to the control end of the IGBT power module in the rectifying part and the inverting part through the optical fiber board and the optical fiber conversion assembly.

2. The low-voltage explosion-proof SVG water-cooled core structure according to claim 1, characterized in that: The water cooling plate (1) is provided with a heat dissipation water channel (29) through which a cooling medium flows, the outer surface of the water cooling plate is provided with a water inlet interface (18) and a water outlet interface (19) communicating with both ends of the heat dissipation water channel, and the heat dissipation water channel is provided with a spoiler (30) for uniformly distributing the cooling medium.

3. The low-voltage explosion-proof SVG water-cooled core structure according to claim 1 or 2, characterized in that: The middle part of the heat absorption surface of the water cooling plate (1) is fixed with a middle support (8), and the left support (9) and the right support (10) are respectively fixed on the heat absorption surface of the water cooling plate on both sides of the middle support; the capacitor assembly (2) is composed of a capacitor mounting metal part (24) and a film capacitor (23) fixed on the capacitor mounting metal part, the film capacitor is connected to the laminated busbar, and the capacitor mounting metal part is fixed on the middle support.

4. The low-voltage explosion-proof SVG water-cooled core structure according to claim 3, characterized in that: The lower surface of the bottom plate (12) of the main control assembly (5) is fixed with a switching power supply (20), a voltage decay indication board (21) and a pulse group suppressor (22), the right side of the bottom plate is hinged to the right support (10) through a hinge (15), and the upper end of the middle support (8) supports the left side of the bottom plate.

5. The low-voltage explosion-proof SVG water-cooled core structure according to claim 3, characterized in that: The inner sides of the left support (9) and the right support (10) are fixed with support plates (26), the optical fiber conversion assembly (6) is composed of three signal conversion circuit boards (11), the signal conversion circuit boards are fixed on the support plates through steel columns, the input and output ends of the signal conversion circuit boards are connected to the output end of the optical fiber board (14) and the control end of the IGBT power module (7) respectively, and the signal conversion circuit boards convert the received optical signals into electrical signals for controlling the IGBT power module to be turned on or off.

6. The low-voltage explosion-proof SVG water-cooled core structure according to claim 3, characterized in that: The outer sides of the left support (9) and the right support (10) are fixed with current sensors for detecting input current and output current respectively.

7. The low-voltage explosion-proof SVG water-cooled core structure according to claim 3, characterized in that: The IGBT power modules (7) are connected through node copper bars (28), and the connection pins between the IGBT power modules and the laminated busbar (25) are connected in parallel with absorption capacitors (17).

Images