Intelligent ice-melting device valve group structure

Abstract

The application discloses an intelligent ice-melting device valve group structure, which comprises a first side plate, a pressing assembly, a first insulating pad, a valve string, a pull rod assembly, a second insulating pad and a second side plate; wherein the first side plate is detachably connected with the second side plate through the pull rod assembly, the pressing assembly is arranged on the first side plate, and the pressing assembly sequentially presses the first insulating pad, the valve string and the second insulating pad between the first side plate and the second side plate; the valve string comprises n power modules arranged in layers. The intelligent ice-melting device valve group structure is integrated, all devices are arranged on a frame to form a module, and the structure is more compact, reasonable and beautiful; the ice-melting device valve group structure based on the pressure contact type structure is convenient to install and maintain; in addition, the ice-melting device valve group structure based on the pressure contact type IGCT device and the water-cooling radiator meets the high-power use requirement, and the operation reliability is high when long-distance power transmission lines are ice-melted.

Description

Technical Field

[0001] This invention belongs to the field of power transmission and distribution technology, and specifically relates to a valve group structure for an intelligent ice-melting device. Background Technology

[0002] Snow and ice disasters pose a serious threat to the power systems of many countries in winter. Severe icing of transmission lines can lead to line breaks, tower collapses, and even large-scale power outages. Therefore, de-icing is an essential electrical device for power grid development. DC de-icing involves applying a DC voltage to the transmission lines and short-circuiting them at the ends, causing the conductors to heat up and melt the ice, thus preventing tower collapses and line breaks due to icing.

[0003] Therefore, developing a long-distance intelligent ice-melting device is of great significance to ensure the stable operation of the power grid system and improve the operational reliability and flexibility of the entire AC / DC hybrid power system. Summary of the Invention

[0004] To address the above problems, the present invention provides a valve group structure for an intelligent ice-melting device, the specific technical solution of which is as follows:

[0005] A valve assembly structure for an intelligent ice-melting device includes a first side plate, a pressing assembly, a first insulating pad, a valve string, a pull rod assembly, a second insulating pad, and a second side plate.

[0006] The first side plate is detachably connected to the second side plate via the pull rod assembly. The clamping assembly is disposed on the first side plate and presses the first insulating pad, the valve string, and the second insulating pad sequentially between the first side plate and the second side plate.

[0007] The valve string includes n stacked power modules, where n is a positive integer greater than or equal to 2. Each power module includes a turn-off thyristor device, a diode device, a capacitor, a first resistor, and a second resistor. The turn-off thyristor device and the diode device in each power module are stacked. A water-cooled heat sink is provided between the diode device and the first insulating pad, between the diode device and the turn-off thyristor device, and between the turn-off thyristor device and the second insulating pad in each of the n power modules. The first resistor and the second resistor of each power module are fixed on the water-cooled heat sink, and the capacitor of each power module is fixedly connected to the water-cooled heat sink through a capacitor fixing copper busbar.

[0008] Furthermore, the circuit connection of each power module is as follows: the anode of the turn-off thyristor device is connected to the cathode of the diode device; the cathode of the turn-off thyristor device is connected to the first terminal of the second resistor and the first terminal of the first resistor; the anode of the diode device is connected to the second terminal of the second resistor and the first terminal of the capacitor; and the second terminal of the capacitor is connected to the second terminal of the first resistor.

[0009] Furthermore, a circular hole is provided in the middle of the first side plate, and the clamping assembly includes a movable block, a butterfly spring, and a top bolt;

[0010] The movable block is cylindrical, with a stepped surface at its lower end and a slidable connection between its upper end and the circular hole. A butterfly spring is fitted onto the movable block and is positioned between the first side plate and the stepped surface of the movable block. A threaded hole is formed in the middle of the movable block, and the top bolt is provided with an external thread. The top bolt is connected to the movable block via a thread.

[0011] Furthermore, it also includes a first insulating beam and a second insulating beam;

[0012] The upper end of the first insulating beam is fixedly connected to the bottom of the first side plate, and the upper end of the second insulating beam is fixedly connected to the bottom of the second side plate.

[0013] Furthermore, the pull rod assembly includes multiple pull rods, multiple connecting blocks, multiple limiting blocks, and multiple nuts;

[0014] The first connecting block, the second connecting block, the third connecting block and the fourth connecting block are respectively set at the four corners of the second side plate. The second end of the first pull rod is connected to the second side plate through the first connecting block, the second end of the second pull rod is connected to the second side plate through the second connecting block, the second end of the third pull rod is connected to the second side plate through the third connecting block, and the second end of the fourth pull rod is connected to the second side plate through the fourth connecting block.

[0015] The first, second, third, and fourth limiting blocks are slidably connected to the third through holes at the four corners of the first side plate. The second ends of the first, second, third, and fourth limiting blocks are all provided with external threads. The first end of the first limiting block is fixedly connected to the first end of the first pull rod, the first end of the second limiting block is fixedly connected to the first end of the second pull rod, the first end of the third limiting block is fixedly connected to the first end of the third pull rod, and the first end of the fourth limiting block is fixedly connected to the first end of the fourth pull rod. The first nut and the second nut are threadedly connected to the second end of the first limiting block, the third nut and the fourth nut are threadedly connected to the second end of the second limiting block, the fifth nut and the sixth nut are threadedly connected to the second end of the third limiting block, and the seventh nut and the eighth nut are threadedly connected to the second end of the fourth limiting block.

[0016] Furthermore, the circuits of the n power modules are connected in series sequentially.

[0017] Furthermore, the turn-off thyristor device is an IGCT device.

[0018] Furthermore, it also includes the main inlet water pipe, the main outlet water pipe, the inlet branch water pipe, the intermediate connecting pipe, and the outlet branch water pipe;

[0019] The main inlet water pipe and the main outlet water pipe are fixed at both ends to the first insulating beam and the second insulating beam, respectively. Multiple water-cooled radiators are divided into m groups. m inlet water pipes and m outlet water pipes are correspondingly provided. One end of each of the m inlet water pipes is connected to the main inlet water pipe, and the other end of each of the m inlet water pipes is connected to the inlet of the first water-cooled radiator in each group. The inlet of the middle water-cooled radiator in each group is connected to the outlet of the next water-cooled radiator via an intermediate connecting pipe. The inlet of the last water-cooled radiator in each group is connected to the outlet of the next water-cooled radiator via an intermediate connecting pipe. The outlets of the last water-cooled radiators in each of the m groups are connected to the main outlet water pipe via the m outlet water pipes.

[0020] Furthermore, the inlet of the main water inlet pipe is provided with a first flange, and the outlet of the main water outlet pipe is provided with a second flange.

[0021] Furthermore, the valve string includes six stacked power modules, and the water-cooled radiator includes four first water-cooled radiators and nine second water-cooled radiators.

[0022] The first water-cooled heat sink A, diode device D1, second water-cooled heat sink A, IGCT device A, second water-cooled heat sink B, diode device D2, second water-cooled heat sink C, IGCT device B, first water-cooled heat sink B, diode device D3, second water-cooled heat sink D, IGCT device C, second water-cooled heat sink E, diode device D4, second water-cooled heat sink F, IGCT device D, first water-cooled heat sink C, diode device D5, second water-cooled heat sink G, IGCT device E, second water-cooled heat sink H, diode device D6, second water-cooled heat sink I, IGCT device F, and first water-cooled heat sink D are sequentially stacked between the first insulating pad 3 and the second insulating pad 5.

[0023] Furthermore, the bottom of the first water-cooled radiator is flush with the bottom of the second water-cooled radiator, and the top of the first water-cooled radiator is higher than the top of the second water-cooled radiator.

[0024] Furthermore, it also includes multiple resistor-fixed copper busbars;

[0025] Specifically, the first resistor Rs1 and the second resistor Rp1 are fixed to one side of the first water-cooled radiator A via a first resistor fixing copper busbar; the first resistor Rs2 and the second resistor Rp2 are fixed to the first side of the first water-cooled radiator B via a second resistor fixing copper busbar; the first resistor Rs3 and the second resistor Rp3 are fixed to the second side of the first water-cooled radiator B via a third resistor fixing copper busbar; the first resistor Rs4 and the second resistor Rp4 are fixed to the first side of the first water-cooled radiator C via a fourth resistor fixing copper busbar; the first resistor Rs5 and the second resistor Rp5 are fixed to the second side of the first water-cooled radiator C via a fifth resistor fixing copper busbar; and the first resistor Rs6 and the second resistor Rp6 are fixed to one side of the first water-cooled radiator D via a sixth resistor fixing copper busbar.

[0026] Furthermore, multiple capacitor fixing copper busbars are provided;

[0027] Specifically, the bottom of the first capacitor fixing copper busbar is connected to the top of the second water-cooled radiator B, capacitor Cs1 is fixed to one side of the top of the first capacitor fixing copper busbar, and capacitor Cs2 is fixed to the other side of the top of the first capacitor fixing copper busbar; the bottom of the second capacitor fixing copper busbar is connected to the top of the second water-cooled radiator E, capacitor Cs3 is fixed to one side of the top of the second capacitor fixing copper busbar, and capacitor Cs4 is fixed to the other side of the top of the second capacitor fixing copper busbar; the bottom of the third capacitor fixing copper busbar is connected to the top of the second water-cooled radiator H, capacitor Cs5 is fixed to one side of the top of the third capacitor fixing copper busbar, and capacitor Cs6 is fixed to the other side of the top of the third capacitor fixing copper busbar.

[0028] Furthermore, capacitor Cs1 is electrically connected to the first resistor Rs1 via a first resistor connecting copper busbar; capacitor Cs2 is electrically connected to the first resistor Rs2 via a second resistor connecting copper busbar; capacitor Cs3 is electrically connected to the first resistor Rs3 via a third resistor connecting copper busbar; capacitor Cs4 is electrically connected to the first resistor Rs4 via a fourth resistor connecting copper busbar; capacitor Cs5 is electrically connected to the first resistor Rs5 via a fifth resistor connecting copper busbar; and capacitor Cs6 is electrically connected to the first resistor Rs6 via a sixth resistor connecting copper busbar.

[0029] The beneficial effects of the present invention are as follows: The intelligent ice-melting device valve group structure of the present invention is integrated, with all components integrated and arranged on a frame to form a module, making the structure more compact, reasonable and beautiful; the press-fit structure facilitates installation and maintenance; in addition, the ice-melting device valve group structure based on press-fit IGCT devices and water-cooled radiators meets the requirements for high-power use, and has high operational reliability when ice-melting long-distance transmission lines.

[0030] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures pointed out in the description, claims and drawings. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 A front view schematic diagram of a valve group structure for an intelligent ice-melting device according to an embodiment of the present invention is shown;

[0033] Figure 2 An isometric view of a valve group structure of an intelligent ice-melting device according to an embodiment of the present invention is shown;

[0034] Figure 3 An installation schematic diagram of a valve group structure for an intelligent ice-melting device according to an embodiment of the present invention is shown.

[0035] Figure 4 An electrical schematic diagram of a valve group structure for an intelligent ice-melting device according to an embodiment of the present invention is shown.

[0036] Figure 5 A schematic diagram of the water circuit installation of a water-cooled radiator according to an embodiment of the present invention is provided.

[0037] In the diagram: 1. First side plate; 2. Clamping assembly; 3. First insulating pad; 4. Pull rod assembly; 5. Second insulating pad; 6. Second side plate; 7. Turn-off thyristor device; 8. Diode device; 9. Capacitor; 10. First resistor; 11. Second resistor; 12. Resistor connecting copper busbar; 13. First insulating beam; 14. Second insulating beam; 15. First through hole; 16. Second through hole; 17. Third through hole; 18. First threaded blind hole; 19. Second threaded blind hole; 20. Pull rod assembly; 21. Rod; 22. Connecting block; 23. Limiting block; 24. Nut; 25. First water-cooled radiator; 26. Second water-cooled radiator; 27. Capacitor fixing copper busbar; 28. Resistor fixing copper busbar; 29. ​​Main water inlet pipe; 30. Main water outlet pipe; 31. Inlet branch pipe; 32. Intermediate connecting pipe; 33. Outlet branch pipe; 34. First flange; 35. Second flange; 36. Inlet busbar; 201. Outlet busbar; 202. Movable block; 203. Butterfly spring; 204. Top bolt. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] It should be noted that the terms "first," "second," etc., used in this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," "longitudinal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings.

[0040] This invention provides a valve group structure for an intelligent de-icing device, which can be used for de-icing long-distance power transmission lines to ensure the stable operation of the power grid system.

[0041] like Figure 1 As shown, a valve assembly structure for an intelligent ice-melting device includes a first side plate 1, a pressing assembly 2, a first insulating pad 3, a valve string, a pull rod assembly 4, a second insulating pad 5, and a second side plate 6. The first side plate 1 is detachably connected to the second side plate 6 via the pull rod assembly 4. The pressing assembly 2 is disposed on the first side plate 1, and the pressing assembly 2 presses the first insulating pad 3, the valve string, and the second insulating pad 5 sequentially between the first side plate 1 and the second side plate 6.

[0042] like Figure 1 and Figure 2 As shown, the valve string includes n stacked power modules, and the circuits of the n power modules are connected in series, where n is a positive integer greater than or equal to 2. Each power module includes a turn-off thyristor device 7, a diode device 8, a capacitor 9, a first resistor 10, and a second resistor 11. The turn-off thyristor device 7 and the diode device 8 in each power module are stacked. Water-cooled heat sinks are provided between the diode device 8 and the first insulating pad 3, between the diode device 8 and the turn-off thyristor device 7, and between the turn-off thyristor device 7 and the second insulating pad 5 in the n power modules.

[0043] When the ice-melting device is working, the turn-off thyristor device 7, diode device 8, first resistor 10, and second resistor 11 will generate a lot of heat. To ensure that the turn-off thyristor device 7 and diode device 8 can work effectively for a long time, this design uses water-cooled heat sinks for heat dissipation. Each turn-off thyristor device 7 and diode device 8 has a water-cooled heat sink on both sides for heat dissipation.

[0044] The first resistor 10 and the second resistor 11 of each power module are fixed to the water-cooled radiator to dissipate heat. One end of the capacitor 9 of each power module is electrically connected to the first resistor 10 through a resistor connecting copper busbar 12, and the other end of the capacitor 9 of each power module is fixedly connected to the water-cooled radiator through a capacitor fixing copper busbar 26.

[0045] The water-cooled heat sink not only dissipates heat from the turn-off thyristor device 7, the diode device 8, the first resistor 10, and the second resistor 11, but also facilitates current conduction. The thermal conductivity of the water-cooled heat sink is tens of times higher than that of ordinary heat sinks, allowing it to dissipate heat more quickly and significantly improving heat dissipation. Furthermore, the water-cooled heat sink exhibits excellent isothermal properties.

[0046] The output current and voltage of the valve group structure of the intelligent ice-melting device in this embodiment of the invention can be continuously adjusted over a wide range by adjusting the number of turn-off thyristor devices 7 and diode devices 8 (i.e., adjusting the number of power modules), thereby meeting the ice-melting needs of different types of wires and different line lengths.

[0047] In the intelligent ice-melting device valve group structure of this invention, each shut-off thyristor device 7 and diode device 8 are connected in series and press-fitted into a power module, resulting in a compact and aesthetically pleasing structure with a reasonable circuit distribution.

[0048] In one embodiment, the turn-off thyristor device 7 is a press-fit IGCT device. Integrated Gate Commutated Thyristors (IGCTs) are a new type of power semiconductor device introduced in 1996 for use in large-scale power electronic systems. An IGCT is a novel high-power semiconductor switching device based on a GTO structure, utilizing an integrated gate structure for hard gate drive, employing a buffer layer structure and a transparent anode emitter technology. It possesses the on-state characteristics of a thyristor and the switching characteristics of a transistor. IGCTs have enabled significant advancements in power, reliability, switching speed, efficiency, cost, weight, and size of power converters, bringing a new leap forward to power electronic systems.

[0049] The IGCT devices of this invention feature high current-carrying capacity (6.5kV / 3.8kA, 5.5kV / 3.6kA, 4.5kV / 5kA), low on-state voltage drop, short-circuit failure characteristics, and high series reliability. The small differences between the IGCT devices ensure, to a certain extent, series voltage equalization.

[0050] like Figure 3 As shown, in one embodiment, a circular hole is provided in the middle of the first side plate 1. The clamping assembly 2 includes a movable block 201, a butterfly spring 202, and a top bolt 203. The movable block 201 is cylindrical, and a stepped surface is provided at the lower end of the movable block 201. The upper end of the movable block 201 is slidably connected to the circular hole of the first side plate 1. The butterfly spring 202 is fitted on the movable block 201 and is located between the first side plate 1 and the stepped surface of the movable block 201. A threaded hole is opened in the middle of the movable block 201, and the top bolt 203 is provided with external threads. The top bolt 203 is connected to the movable block 201 by threads.

[0051] In this embodiment, the pressure of the butterfly spring 202 can be adjusted according to the requirements of the devices. The valve group structure of the ice-melting device uses the rotating top bolt 203 to press the butterfly spring 202 to generate pressure, thus pressing and encapsulating the IGCT device, diode device 8, and water-cooled heat sink together. The top bolt 203 is threadedly connected to the movable block 201. When the devices of the power module need to be replaced, adjusting the position of the top bolt 203 can relieve the pressure on the entire module for replacement and maintenance. During reinstallation, simply tightening the threads will press the devices of the power module into place.

[0052] In one embodiment, the valve assembly structure of the intelligent ice-melting device further includes a first insulating beam 13 and a second insulating beam 14. The first insulating beam 13 and the second insulating beam 14 have an I-shaped cross-section. The upper end of the first insulating beam 13 is fixedly connected to the bottom of the first side plate 1, and the upper end of the second insulating beam 14 is fixedly connected to the bottom of the second side plate 6. The first insulating beam 13 and the second insulating beam 14 not only play a supporting role, but also ensure the creepage distance and air discharge distance of the intelligent ice-melting device valve assembly structure to the ground.

[0053] In one embodiment, the upper ends of both the first insulating beam 13 and the second insulating beam 14 are provided with multiple first through holes 15, and the lower ends of both the first insulating beam 13 and the second insulating beam 14 are provided with multiple second through holes 16. Both the first side plate 1 and the second side plate 6 are square structures. The four corners of the first side plate 1 are provided with third through holes 17, each surface of the first side plate 1 is provided with multiple first threaded blind holes 18, and each surface of the second side plate 6 is provided with multiple second threaded blind holes 19. The first side plate 1 and the first insulating beam 13 can be detachably connected by bolts passing through the first through holes 15 at the upper end of the first insulating beam 13 and threaded blind holes 18 at the bottom of the first side plate 1. Similarly, the second side plate 6 and the second insulating beam 14 can be detachably connected by bolts passing through the first through holes 15 at the upper end of the second insulating beam 14 and threaded blind holes 19 at the bottom of the second side plate 6. The first insulating beam 13 and the second insulating beam 14 can be detachably connected to the ground or other structures by bolts passing through the second through holes 16 at the lower ends of the first insulating beam 13 and the second insulating beam 14.

[0054] In one embodiment, the pull rod assembly 4 includes a plurality of pull rods 20, a plurality of connecting blocks 21, a plurality of limiting blocks 22, and a plurality of nuts 23.

[0055] The first connecting block, the second connecting block, the third connecting block and the fourth connecting block are respectively set at the four corners of the second side plate 6. The second end of the first pull rod is connected to the second side plate 6 through the first connecting block, the second end of the second pull rod is connected to the second side plate 6 through the second connecting block, the second end of the third pull rod is connected to the second side plate 6 through the third connecting block, and the second end of the fourth pull rod is connected to the second side plate 6 through the fourth connecting block.

[0056] The first, second, third, and fourth limiting blocks are slidably connected to the third through holes 17 at the four corners of the first side plate 1. The second ends of the first, second, third, and fourth limiting blocks are all provided with external threads. The first end of the first limiting block is fixedly connected to the first end of the first pull rod, the first end of the second limiting block is fixedly connected to the first end of the second pull rod, the first end of the third limiting block is fixedly connected to the first end of the third pull rod, and the first end of the fourth limiting block is fixedly connected to the first end of the fourth pull rod. The first nut and the second nut are threadedly connected to the second end of the first limiting block, the third nut and the fourth nut are threadedly connected to the second end of the second limiting block, the fifth nut and the sixth nut are threadedly connected to the second end of the third limiting block, and the seventh nut and the eighth nut are threadedly connected to the second end of the fourth limiting block.

[0057] After the first insulating beam 13 and the second insulating beam 14 are fixedly connected to the ground or other structures, multiple nuts 23 tighten and fix the first side plate 1 and the second side plate 6 through multiple tie rods 20. In addition, in this embodiment, each limiting block 22 is fastened by double nuts 23 to prevent loosening.

[0058] like Figure 3 As shown, in one embodiment, the valve string includes six stacked power modules, and the water-cooled radiator includes four first water-cooled radiators 24 and nine second water-cooled radiators 25. The cross-sectional area of ​​the first water-cooled radiators 24 is larger than that of the second water-cooled radiators 25. The bottom of the first water-cooled radiators 24 is flush with the bottom of the second water-cooled radiators 25, and the top of the first water-cooled radiators 24 is higher than the top of the second water-cooled radiators 25.

[0059] The valve group structure of the intelligent ice melting device also includes multiple resistor fixing copper busbars 27 for fixing the first resistor 10 and the second resistor 11, and multiple capacitor fixing copper busbars 26 are provided.

[0060] The first water-cooled heat sink A, diode device D1, second water-cooled heat sink A, IGCT device A, second water-cooled heat sink B, diode device D2, second water-cooled heat sink C, IGCT device B, first water-cooled heat sink B, diode device D3, second water-cooled heat sink D, IGCT device C, second water-cooled heat sink E, diode device D4, second water-cooled heat sink F, IGCT device D, first water-cooled heat sink C, diode device D5, second water-cooled heat sink G, IGCT device E, second water-cooled heat sink H, diode device D6, second water-cooled heat sink I, IGCT device F, and first water-cooled heat sink D are sequentially stacked between the first insulating pad 3 and the second insulating pad 5.

[0061] The first resistor Rs1 and the second resistor Rp1 are fixed to one side of the first water-cooled radiator A via a first resistor fixing copper busbar. The first resistor Rs2 and the second resistor Rp2 are fixed to the first side of the first water-cooled radiator B via a second resistor fixing copper busbar. The first resistor Rs3 and the second resistor Rp3 are fixed to the second side of the first water-cooled radiator B via a third resistor fixing copper busbar. The first resistor Rs4 and the second resistor Rp4 are fixed to the first side of the first water-cooled radiator C via a fourth resistor fixing copper busbar. The first resistor Rs5 and the second resistor Rp5 are fixed to the second side of the first water-cooled radiator C via a fifth resistor fixing copper busbar. The first resistor Rs6 and the second resistor Rp6 are fixed to one side of the first water-cooled radiator D via a sixth resistor fixing copper busbar.

[0062] The bottom of the first capacitor fixing copper busbar is connected to the top of the second water-cooled radiator B. Capacitor Cs1 is fixed to one side of the top of the first capacitor fixing copper busbar, and capacitor Cs2 is fixed to the other side of the top of the first capacitor fixing copper busbar. The bottom of the second capacitor fixing copper busbar is connected to the top of the second water-cooled radiator E. Capacitor Cs3 is fixed to one side of the top of the second capacitor fixing copper busbar, and capacitor Cs4 is fixed to the other side of the top of the second capacitor fixing copper busbar. The bottom of the third capacitor fixing copper busbar is connected to the top of the second water-cooled radiator H. Capacitor Cs5 is fixed to one side of the top of the third capacitor fixing copper busbar, and capacitor Cs6 is fixed to the other side of the top of the third capacitor fixing copper busbar.

[0063] One end of capacitor Cs1 is electrically connected to the first resistor Rs1 via a first resistor connected to a copper busbar. One end of capacitor Cs2 is electrically connected to the first resistor Rs2 via a second resistor connected to a copper busbar. One end of capacitor Cs3 is electrically connected to the first resistor Rs3 via a third resistor connected to a copper busbar. One end of capacitor Cs4 is electrically connected to the first resistor Rs4 via a fourth resistor connected to a copper busbar. One end of capacitor Cs5 is electrically connected to the first resistor Rs5 via a fifth resistor connected to a copper busbar. One end of capacitor Cs6 is electrically connected to the first resistor Rs6 via a sixth resistor connected to a copper busbar.

[0064] It should be noted that the capacitor fixing copper busbar 26 and the resistor fixing copper busbar 27 in this embodiment of the invention serve both as fixing elements and as conductors.

[0065] In one embodiment, the valve string includes eight stacked power modules. The specific press-fit structure is the same as that of a six-stacked power module, and will not be described in detail here.

[0066] like Figure 4 As shown, the valve string consists of eight power modules connected in series, and the valve string includes eight IGCT devices. Figure 4 IGCT1-IGCT8), 8 diode devices 8 ( Figure 4 D1-D8), 8 capacitors 9 ( Figure 4 Cs1-Cs8), 8 first resistors 10 ( Figure 4 Rs1-Rs8) and 8 second resistors 11 ( Figure 4 (Rp1-Rp8 in the middle).

[0067] like Figure 4 As shown, taking the first power module as an example, the circuit connection of each power module is explained: IGCT device ( Figure 4 The anode and diode device 8 of IGCT1) Figure 4 The D1 cathode connection in the IGCT device ( Figure 4 The cathode of IGCT1) and the second resistor 11 ( Figure 4 Rp1) first terminal and first resistor 10 ( Figure 4The first terminal of Rs1 is connected to the diode device 8. Figure 4 D1) anode and second resistor 11 ( Figure 4 The second terminal of Rp1 and capacitor 9 ( Figure 4 The first terminal of Cs1 is connected, and capacitor 9 ( Figure 4 The second terminal of Cs1 is connected to the first resistor 10. Figure 4 The second end of Rs1 is connected.

[0068] In one embodiment, such as Figure 5 As shown, the valve group structure of the intelligent ice melting device also includes an inlet main water pipe 28, an outlet main water pipe 29, an inlet water diversion pipe 30, an intermediate connecting pipe 31, and an outlet water diversion pipe 32.

[0069] The main inlet water pipe 28 and the main outlet water pipe 29 are arranged in parallel to each other, and the two ends of the main inlet water pipe 28 and the main outlet water pipe 29 are respectively fixed at the middle position of the first insulating beam 13 and the middle position of the second insulating beam 14.

[0070] The water-cooled radiators are grouped and configured with water circuits. Multiple water-cooled radiators are divided into m groups. There are m inlet water pipes 30 and m outlet water pipes 32. One end of each of the m inlet water pipes 30 is connected to the main inlet water pipe 28, and the other end of each of the m inlet water pipes 30 is connected to the inlet of the first water-cooled radiator in each group. The inlet of the water-cooled radiator in the middle of each group is connected to the outlet of the next water-cooled radiator through an intermediate connecting pipe 31. The inlet of the last water-cooled radiator in each group is connected to the outlet of the next water-cooled radiator through an intermediate connecting pipe 31. The outlets of the last water-cooled radiators in each of the m groups are connected to the main outlet water pipe 29 through m outlet water pipes 32.

[0071] For example, the first water-cooled radiator A, the second water-cooled radiator B, and the second water-cooled radiator C are divided into the first group; the first water-cooled radiator B, the second water-cooled radiator D, and the second water-cooled radiator E are divided into the second group; the second water-cooled radiator F, the first water-cooled radiator C, and the second water-cooled radiator G are divided into the third group; and the second water-cooled radiator H, the second water-cooled radiator I, and the first water-cooled radiator D are divided into the fourth group. The inlet of the first water-cooled radiator A, the inlet of the first water-cooled radiator B, the second water-cooled radiator F, and the second water-cooled radiator H are connected to the main water inlet pipe 28 through four inlet water-cooling pipes 30. The outlet of the second water-cooled radiator C, the outlet of the second water-cooled radiator E, the outlet of the second water-cooled radiator G, and the outlet of the first water-cooled radiator D are connected to the main water outlet pipe 29 through four outlet water-cooling pipes 32. The intermediate connecting pipe 31 is used to connect the water circuits between each group of water-cooled radiators. The specific connection is not described in detail.

[0072] Furthermore, the inlet of the main water inlet pipe 28 is equipped with a first flange 33, and the outlet of the main water outlet pipe 29 is equipped with a second flange 34. The first flange 33 and the second flange 34 are connected to the external pipeline to discharge heat to the outside of the valve string, which plays a role in heat exchange. The flange connection facilitates installation and maintenance.

[0073] In one embodiment, the valve group structure of the intelligent ice melting device further includes an inlet busbar 35 and an outlet busbar 36. One end of the inlet busbar 35 and the outlet busbar 36 are fixedly connected to a water-cooled radiator. For example, one end of the inlet busbar 35 is fixedly connected to a first water-cooled radiator A, and one end of the outlet busbar 36 is fixedly connected to a first water-cooled radiator D.

[0074] In the valve group structure of the intelligent ice-melting device of this invention embodiment, the pressure requirement range of the IGCT device is 36-44kN, and the diode device 8 can be modified in model and specification according to electrical parameters.

[0075] Before installing the valve assembly structure of the intelligent ice-melting device in this embodiment of the invention, it is necessary to ensure that the surface flatness of the IGCT device collector, the surface flatness and roughness of the heat sink meet the requirements, and that the dimensional and positional tolerances between the upper and lower IGCT devices meet the requirements. Before pressing, clean the pressing surfaces of each part to ensure that there is no oil stains or defects such as damage.

[0076] During press-fitting, the pressure center must perfectly coincide with the centers of the pressing assembly 2, the water-cooled heat sink, the IGCT device, and the diode device 8, without any eccentricity. Press-fitting requires that the four sides of the water-cooled heat sink and the drive end face of the IGCT device be parallel to the four sides of the overall power module facade. The press-fitting pressure must meet the usage requirements of the IGCT device, with no overpressure or underpressure. The press-fitting pressure should be evenly distributed within an 85mm diameter range outward from the center of the IGCT device.

[0077] The intelligent ice-melting device of this invention features an integrated valve group structure design, in which all components are integrated and arranged on a frame to form a module, resulting in a more compact, reasonable, and aesthetically pleasing structure. The modular design, with its press-fit structural unit and internal modules, facilitates easy installation and maintenance.

[0078] In addition, the valve group structure of the ice melting device is based on the press-fit IGCT device and water-cooled heat sink to meet the requirements of high power use, and has high operational reliability when ice melting long-distance transmission lines.

[0079] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A valve assembly structure for an intelligent ice-melting device, characterized in that, Includes a first side plate, a clamping assembly, a first insulating pad, a valve string, a pull rod assembly, a second insulating pad, and a second side plate; The first side plate is detachably connected to the second side plate via the pull rod assembly. The clamping assembly is disposed on the first side plate and presses the first insulating pad, the valve string, and the second insulating pad sequentially between the first side plate and the second side plate. The valve string includes n stacked power modules, where n is a positive integer greater than or equal to 2. Each power module includes a turn-off thyristor device, a diode device, a capacitor, a first resistor, and a second resistor. The turn-off thyristor device and the diode device in each power module are stacked. A water-cooled heat sink is provided between the diode device and the first insulating pad, between the diode device and the turn-off thyristor device, and between the turn-off thyristor device and the second insulating pad in each of the n power modules. The first resistor and the second resistor of each power module are fixed on the water-cooled heat sink, and the capacitor of each power module is fixedly connected to the water-cooled heat sink through a capacitor fixing copper busbar. The bottom of the first water-cooled radiator is flush with the bottom of the second water-cooled radiator, and the top of the first water-cooled radiator is higher than the top of the second water-cooled radiator. It also includes multiple resistor fixing copper busbars; wherein, the first resistor Rs1 and the second resistor Rp1 are fixed to one side of the first water-cooled radiator A through the first resistor fixing copper busbar, the first resistor Rs2 and the second resistor Rp2 are fixed to the first side of the first water-cooled radiator B through the second resistor fixing copper busbar, the first resistor Rs3 and the second resistor Rp3 are fixed to the second side of the first water-cooled radiator B through the third resistor fixing copper busbar, the first resistor Rs4 and the second resistor Rp4 are fixed to the first side of the first water-cooled radiator C through the fourth resistor fixing copper busbar, the first resistor Rs5 and the second resistor Rp5 are fixed to the second side of the first water-cooled radiator C through the fifth resistor fixing copper busbar, and the first resistor Rs6 and the second resistor Rp6 are fixed to one side of the first water-cooled radiator D through the sixth resistor fixing copper busbar. Multiple capacitor fixing copper busbars are provided; wherein, the bottom of the first capacitor fixing copper busbar is connected to the top of the second water-cooled radiator B, capacitor Cs1 is fixed to one side of the top of the first capacitor fixing copper busbar, and capacitor Cs2 is fixed to the other side of the top of the first capacitor fixing copper busbar; the bottom of the second capacitor fixing copper busbar is connected to the top of the second water-cooled radiator E, capacitor Cs3 is fixed to one side of the top of the second capacitor fixing copper busbar, and capacitor Cs4 is fixed to the other side of the top of the second capacitor fixing copper busbar; the bottom of the third capacitor fixing copper busbar is connected to the top of the second water-cooled radiator H, capacitor Cs5 is fixed to one side of the top of the third capacitor fixing copper busbar, and capacitor Cs6 is fixed to the other side of the top of the third capacitor fixing copper busbar.

2. The valve assembly structure of the intelligent ice-melting device according to claim 1, characterized in that, The circuit connection of each power module is as follows: the anode of the turn-off thyristor device is connected to the cathode of the diode device; the cathode of the turn-off thyristor device is connected to the first terminal of the second resistor and the first terminal of the first resistor; the anode of the diode device is connected to the second terminal of the second resistor and the first terminal of the capacitor; and the second terminal of the capacitor is connected to the second terminal of the first resistor.

3. The valve assembly structure of the intelligent ice-melting device according to claim 1, characterized in that, The first side plate has a circular hole in the middle, and the clamping assembly includes a movable block, a butterfly spring and a top bolt; The movable block is cylindrical, with a stepped surface at its lower end and a slidable connection between its upper end and the circular hole. A butterfly spring is fitted onto the movable block and is positioned between the first side plate and the stepped surface of the movable block. A threaded hole is formed in the middle of the movable block, and the top bolt is provided with an external thread. The top bolt is connected to the movable block via a thread.

4. The valve assembly structure of the intelligent ice-melting device according to claim 1, characterized in that, It also includes a first insulating beam and a second insulating beam; The upper end of the first insulating beam is fixedly connected to the bottom of the first side plate, and the upper end of the second insulating beam is fixedly connected to the bottom of the second side plate.

5. The valve assembly structure of the intelligent ice-melting device according to claim 1, characterized in that, The pull rod assembly includes multiple pull rods, multiple connecting blocks, multiple limiting blocks, and multiple nuts; The first connecting block, the second connecting block, the third connecting block and the fourth connecting block are respectively set at the four corners of the second side plate. The second end of the first pull rod is connected to the second side plate through the first connecting block, the second end of the second pull rod is connected to the second side plate through the second connecting block, the second end of the third pull rod is connected to the second side plate through the third connecting block, and the second end of the fourth pull rod is connected to the second side plate through the fourth connecting block. The first, second, third, and fourth limiting blocks are slidably connected to the third through holes at the four corners of the first side plate. The second ends of the first, second, third, and fourth limiting blocks are all provided with external threads. The first end of the first limiting block is fixedly connected to the first end of the first pull rod, the first end of the second limiting block is fixedly connected to the first end of the second pull rod, the first end of the third limiting block is fixedly connected to the first end of the third pull rod, and the first end of the fourth limiting block is fixedly connected to the first end of the fourth pull rod. The first nut and the second nut are threadedly connected to the second end of the first limiting block, the third nut and the fourth nut are threadedly connected to the second end of the second limiting block, the fifth nut and the sixth nut are threadedly connected to the second end of the third limiting block, and the seventh nut and the eighth nut are threadedly connected to the second end of the fourth limiting block.

6. The valve group structure of the intelligent ice-melting device according to claim 2, characterized in that, The circuits of the n power modules are connected in series sequentially.

7. The valve assembly structure of the intelligent ice-melting device according to any one of claims 1-6, characterized in that, The turn-off thyristor device is an IGCT device.

8. The valve assembly structure of the intelligent ice-melting device according to any one of claims 1-6, characterized in that, It also includes the main inlet water pipe, the main outlet water pipe, the inlet branch water pipe, the intermediate connecting pipe, and the outlet branch water pipe; The main inlet water pipe and the main outlet water pipe are fixed at both ends to the first insulating beam and the second insulating beam, respectively. Multiple water-cooled radiators are divided into m groups. m inlet water pipes and m outlet water pipes are correspondingly provided. One end of each of the m inlet water pipes is connected to the main inlet water pipe, and the other end of each of the m inlet water pipes is connected to the inlet of the first water-cooled radiator in each group. The inlet of the middle water-cooled radiator in each group is connected to the outlet of the next water-cooled radiator via an intermediate connecting pipe. The inlet of the last water-cooled radiator in each group is connected to the outlet of the next water-cooled radiator via an intermediate connecting pipe. The outlets of the last water-cooled radiators in each of the m groups are connected to the main outlet water pipe via the m outlet water pipes.

9. The valve assembly structure of the intelligent ice-melting device according to claim 8, characterized in that, The inlet of the main water inlet pipe is equipped with a first flange, and the outlet of the main water outlet pipe is equipped with a second flange.

10. The valve assembly structure of the intelligent ice-melting device according to claim 7, characterized in that, The valve string includes six stacked power modules, and the water-cooled radiator includes four first water-cooled radiators and nine second water-cooled radiators. The first water-cooled heat sink A, diode device D1, second water-cooled heat sink A, IGCT device A, second water-cooled heat sink B, diode device D2, second water-cooled heat sink C, IGCT device B, first water-cooled heat sink B, diode device D3, second water-cooled heat sink D, IGCT device C, second water-cooled heat sink E, diode device D4, second water-cooled heat sink F, IGCT device D, first water-cooled heat sink C, diode device D5, second water-cooled heat sink G, IGCT device E, second water-cooled heat sink H, diode device D6, second water-cooled heat sink I, IGCT device F, and first water-cooled heat sink D are sequentially stacked between the first insulating pad 3 and the second insulating pad 5.

11. The valve assembly structure of the intelligent ice-melting device according to claim 1, characterized in that, Capacitor Cs1 is electrically connected to the first resistor Rs1 via a copper busbar connected to the first resistor Rs1 via a first resistor. Capacitor Cs2 is electrically connected to the first resistor Rs2 via a copper busbar connected to the second resistor. Capacitor Cs3 is electrically connected to the first resistor Rs3 via a copper busbar connected to the third resistor. Capacitor Cs4 is electrically connected to the first resistor Rs4 via a copper busbar connected to the fourth resistor. Capacitor Cs5 is electrically connected to the first resistor Rs5 via a copper busbar connected to the fifth resistor. Capacitor Cs6 is electrically connected to the first resistor Rs6 via a copper busbar connected to the sixth resistor.

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