Power supply system of polycrystalline silicon reduction furnace

Abstract

The utility model discloses a power supply system of a polycrystalline silicon reduction furnace, which comprises a transformer, a power cabinet and a bus for connecting a winding wire outlet end of the transformer and a wire inlet end of the power cabinet, and the power cabinet comprises a lower power regulation assembly and an upper power regulation assembly which are stacked up and down. The three-phase upper winding wire outlet end of the transformer is connected with the upper wire inlet end of the upper power adjusting assembly of the corresponding power cabinet, the three-phase lower winding wire outlet end of the transformer is connected with the lower wire inlet end of the lower power adjusting assembly of the corresponding power cabinet, and the lower wire inlet end and the lower wire inlet end are arranged on the side close to the transformer. The upper wire inlet end and the corresponding wire outlet end of the upper winding are connected through a straight bus, and the lower wire inlet end and the corresponding wire outlet end of the lower winding are connected through a straight bus. The polycrystalline silicon reduction furnace power supply system optimizes the arrangement of the bus, the transformer and the power cabinet, reduces the loss of the bus system, and reduces the cost.

Description

Technical Field

[0001] The utility model relates to the technical field of reduction furnace power supply systems, in particular to a polysilicon reduction furnace power supply system. Background Art

[0002] At present, the polysilicon reduction power supply system at home and abroad includes a multi-tap transformer 1, a busbar 2, a power cabinet 3, and a control cabinet; its layout requires the establishment of a transformer room and a reduction power cabinet room, such as Figure 1 A typical layout diagram of a polysilicon reduction furnace power supply system in the prior art is shown in FIG. Figure 2 The figure shows a typical connection diagram of the power supply system of a polysilicon reduction furnace in the prior art. The original power supply system has 6 power cabinets 3, and the horizontal distance between the transformer 1 and the power cabinet 3 is about 3.2 meters. The top of the power cabinet 3 is connected to the busbar 2. The output line on the low-voltage side of the transformer 1 is an upper and lower structure coil. The output line located in the lower half of the transformer 1 needs to be lifted up with a copper bar, and the upper and lower coil output lines also need to be arranged in a straight line with a copper bar. The busbar 2 connecting the transformer 1 and the power cabinet 3 needs to be raised to a height of 3.6 meters and then connected through the wall. Transformer 1 is far away from power cabinet 3, and the connection path of busbar 2 from transformer 1 to power cabinet 3 is long. Busbar 2 requires large investment, busbar 2 line loss is large, installation workload is large and wiring is relatively complicated, construction period is long, and installation and commissioning costs are high; busbar 2 uses a large number of rows and has a high cost; busbar 2 loop current has a large harmonic content, and the longer busbar 2 is, the greater the loop impedance loss is; transformer 1 has a high cost because the busbar on the transformer outgoing line side needs to be lifted up to a certain height and arranged in a straight line; the equipment layout space in power cabinet 3 is close without partition isolation, which is prone to arc short-circuit faults, seriously affecting the safe and stable operation of the system.

[0003] like Figure 3 The partial front view of a typical power cabinet in the prior art is shown, with 6 power cabinets 3 arranged in parallel, the layout space of the components in the power cabinet 3 is tight, and there is no isolation measure between the 5 voltage levels in the cabinet, which easily causes the risk of arc flash and fire; the system wiring is complicated and inconvenient for maintenance, and maintenance also requires entering the maintenance passage in the cabinet from the side door, which is very inconvenient. The transformer 1 and the power cabinet 3 are arranged in two rooms respectively. There are many power cabinets 3, covering an area of ​​about 80 square meters, which has high requirements for plant land and high construction costs for plant buildings.

[0004] In summary, how to propose a new type of polysilicon reduction furnace power supply system to optimize the system bus, transformer, power cabinet layout, reduce bus system losses, and reduce costs is a problem that technical personnel in this field urgently need to solve. Utility Model Content

[0005] The utility model aims to provide a polysilicon reduction furnace power supply system, which optimizes the arrangement of busbars, transformers and power cabinets, reduces busbar system losses and reduces costs.

[0006] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0007] A power supply system for a polysilicon reduction furnace comprises a transformer, a power cabinet and a busbar connecting the transformer winding outlet and the power cabinet inlet terminal, the power cabinet comprising a lower power regulating component and an upper power regulating component stacked up and down, the upper winding outlet of the transformer three-phase electricity is respectively connected to the upper inlet terminal of the upper power regulating component of the corresponding power cabinet, the lower winding outlet of the transformer three-phase electricity is connected to the lower inlet terminal of the lower power regulating component of the corresponding power cabinet, the lower inlet terminal and the lower inlet terminal are arranged on one side close to the transformer, and the upper inlet terminal and the corresponding upper winding outlet terminal, as well as the lower inlet terminal and the corresponding lower winding outlet terminal are connected through a straight busbar.

[0008] Optionally, the power cabinet includes a first power cabinet and a second power cabinet, and the power cabinet corresponding to the upper incoming line terminal and the lower incoming line terminal is the first power cabinet.

[0009] The three-phase transformer also includes a top winding outlet terminal, which corresponds to the second power cabinet. The second power cabinet is arranged side by side in front of the first power cabinet, and the second power cabinet adopts an upper incoming line and an upper outgoing line arrangement.

[0010] Optionally, an isolation wall is provided between the transformer and the power cabinet, and two long holes are opened on the isolation wall, which are respectively consistent with the height of the upper busbar and the lower busbar. The power cabinets are arranged in sequence along the length direction of the isolation wall, and the horizontal positions of the winding outlet terminals and the corresponding incoming terminals are aligned. The power cabinet is a cube, and the power cabinet is close to the back of the transformer and is in close contact with the isolation wall.

[0011] Optionally, a maintenance passage is provided between the power cabinets, and the power cabinets are provided with inspection doors at the front side parallel to the isolation wall and at the side side perpendicular to the isolation wall.

[0012] Optionally, the reduction furnace is located on a side of the power cabinet away from the transformer, and the horizontal projection of the power cabinet does not overlap with the horizontal projection of the reduction furnace water outlet; the outlet terminal of the power cabinet is arranged at the top thereof, the lead-out wire of the power cabinet is connected to the bottom of the reduction furnace, and the power cabinet and the reduction furnace are connected by a water-cooling cable.

[0013] Optionally, the lead wires of the power cabinet include a horizontal lead wire led out from the lead wire terminal of the power cabinet and a vertical lead wire connected to the input terminal at the bottom of the reduction furnace;

[0014] The horizontal lead-out line connecting the power cabinet in the middle is perpendicular to the isolation wall, and the horizontal lead-out line connecting the power cabinets on both sides of the middle position has a concave bending section approaching the middle position.

[0015] Optionally, the upper power regulating component and the lower power regulating component are provided with a busbar area, a fast-melting area and a voltage regulating area according to functional divisions, and the busbar area, the fast-melting area and the voltage regulating area are sequentially distributed from top to bottom, and the power cabinet further comprises a start-up area and a control area connected to the upper power regulating component and the lower power regulating component, the control area is located above the start-up area, the control area and the start-up area are located at the front of the power cabinet, a control panel connected to the control area is provided at the front of the power cabinet, and the busbar area, the fast-melting area and the voltage regulating area are located at the rear of the power cabinet;

[0016] An isolation baffle is provided between the multiple voltage levels of the fast-melting zone and the voltage-regulating zone.

[0017] Optionally, it also includes a transverse guide rail installed on the ground, a longitudinal guide rail installed on the transverse guide rail and capable of moving laterally thereof, and a vertical lifting member installed on the longitudinal guide rail and capable of moving longitudinally thereof, and the transformer is installed on the vertical lifting member; it also includes a position adjustment device for adjusting the position change of the transformer.

[0018] Optionally, the position adjustment device comprises:

[0019] A first position sensor for detecting the position of the winding outlet end;

[0020] A second position sensor for detecting the position of the incoming line terminal;

[0021] An adjusting mechanism connected to the first position sensor and the second position sensor, for detecting when the winding outlet end is not aligned with the corresponding incoming line end, and adjusting the winding outlet end to a position aligned with the corresponding incoming line end.

[0022] Optionally, the adjustment mechanism comprises:

[0023] A receiving unit for receiving the winding outlet terminal position information detected by the first position sensor and the incoming terminal position information detected by the second position sensor;

[0024] A judging unit connected to the receiving unit and used to judge whether the position of the winding outlet end is aligned with the position of the corresponding incoming end;

[0025] An adjusting part connected to the judging unit and used for controlling the winding outlet end to be adjusted to a position aligned with the corresponding incoming line end when detecting that the position of the winding outlet end is not aligned with the position of the corresponding incoming line end.

[0026] The power supply system of the polysilicon reduction furnace provided by the utility model has a power cabinet with two independent upper and lower areas, and the upper power regulating components and the lower power regulating components are stacked up and down, and the upper power regulating components and the lower power regulating components are independent of each other and are controlled separately. The transformer includes three-phase electricity, and the low-voltage side of each phase electricity includes two coils, an upper winding outlet terminal and a lower winding outlet terminal. Each phase electricity corresponds to a power cabinet, and the upper winding outlet terminal is connected to the upper incoming terminal of the upper power regulating component of the corresponding power cabinet, and the lower winding outlet terminal is connected to the lower incoming terminal of the lower power regulating component of the corresponding power cabinet.

[0027] The positions of the transformer and the power cabinet correspond one to one. The incoming line terminal is set on the side close to the transformer. The power cabinet is connected from the back. The upper incoming line terminal is connected to the corresponding upper winding outgoing line terminal through a straight busbar, and the lower incoming line terminal is connected to the corresponding lower winding outgoing line terminal through a straight busbar. At this time, the busbar between the transformer and the power cabinet does not need to be raised to the set elevation before connection. It is directly connected through the horizontal busbar, eliminating the vertical busbar.

[0028] The polysilicon reduction furnace power supply system provided by the utility model reduces the equipment footprint and saves busbar investment costs; the transformer upper and lower coil outgoing busbars do not need to be lifted upward and arranged in a line, which reduces the copper busbar usage and thus reduces the transformer investment cost; the power cabinet layout is optimized, the failure rate is reduced, and maintenance is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 This is a typical layout diagram of a polysilicon reduction furnace power supply system in the prior art;

[0031] Figure 2 A typical power supply system connection diagram of a polysilicon reduction furnace in the prior art;

[0032] Figure 3 It is a partial front view of a typical power cabinet in the prior art;

[0033] Figure 4A schematic diagram of the plan layout of a power supply system for a polysilicon reduction furnace provided in a specific embodiment of the utility model;

[0034] Figure 5 for Figure 4 Schematic diagram of connecting busbars;

[0035] Figure 6 This is the layout diagram of the power cabinet corresponding to the transformer 6 coils;

[0036] Figure 7 A schematic diagram of the plan layout of a power supply system for a polysilicon reduction furnace provided in another specific embodiment of the utility model;

[0037] Figure 8 for Figure 7 Schematic diagram of connecting busbars;

[0038] Fig. 9 This is the layout diagram of the power cabinet corresponding to the transformer 9 coil. DETAILED DESCRIPTION

[0039] The core of the utility model is to provide a polysilicon reduction furnace power supply system, which optimizes the arrangement of busbars, transformers and power cabinets, reduces busbar system losses and reduces costs.

[0040] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0041] Please refer to Figures 4 to 9 , Figure 4 A schematic diagram of the plan layout of a power supply system for a polysilicon reduction furnace provided in a specific embodiment of the utility model; Figure 5 for Figure 4 Schematic diagram of connecting busbars; Figure 6 This is the layout diagram of the power cabinet corresponding to the transformer 6 coils; Figure 7 A schematic diagram of the plan layout of a power supply system for a polysilicon reduction furnace provided in another specific embodiment of the utility model; Figure 8 for Figure 7 Schematic diagram of connecting busbars; Fig. 9 This is the layout diagram of the power cabinet corresponding to the transformer 9 coil.

[0042] In a specific embodiment, the polysilicon reduction furnace power supply system provided by the utility model includes a transformer 1, a power cabinet 3 and a busbar 2 connecting the transformer 1 winding outlet and the power cabinet 3 input terminal, the power cabinet 3 includes a lower power regulating component and an upper power regulating component stacked up and down, the upper winding outlet of the three-phase electricity of the transformer 1 is respectively connected to the upper input terminal 31 of the upper power regulating component of the corresponding power cabinet, the lower winding outlet of the three-phase electricity of the transformer 1 is connected to the lower input terminal 38 of the lower power regulating component of the corresponding power cabinet, the lower input terminal 38 and the lower input terminal 38 are arranged on a side close to the transformer 1, and the upper input terminal 31 and the corresponding upper winding outlet and the lower input terminal 38 and the corresponding lower winding outlet are connected through a straight busbar.

[0043] In the above structure, the power supply system of the polysilicon reduction furnace includes a transformer 1, a power cabinet 3 and a busbar 2. There is a distance between the transformer 1 and the power cabinet 3. The winding output terminal of the transformer 1 and the input terminal of the power cabinet 3 are connected through the busbar 2.

[0044] The power cabinet 3 is provided with two independent areas, namely, an upper power regulating assembly and a lower power regulating assembly, which are stacked up and down, and the upper power regulating assembly is located above the lower power regulating assembly. The upper power regulating assembly is provided with an upper inlet terminal 31, and the lower power regulating assembly is provided with a lower inlet terminal 38. The upper power regulating assembly and the lower power regulating assembly are independent of each other and are controlled separately.

[0045] The transformer 1 includes three-phase electricity, namely, phase A electricity, phase B electricity and phase C electricity, and the low-voltage side of each phase electricity includes two coils, an upper winding outlet terminal and a lower winding outlet terminal. Each phase electricity corresponds to a power cabinet, that is, the three-phase transformer 1 corresponds to 3 power cabinets. The upper winding outlet terminal is connected to the upper inlet terminal 31 of the upper power regulating component of the corresponding power cabinet, and the lower winding outlet terminal is connected to the lower inlet terminal 38 of the lower power regulating component of the corresponding power cabinet.

[0046] The number of coils on the low-voltage side of transformer 1 is different from the number of power cabinets. For example, six coils on the low-voltage side of transformers are matched with three power cabinets 3, so that the number of power cabinets 3 is reduced from 2n to n. The function of power cabinets 3 remains unchanged, the number is halved, and the floor space is halved.

[0047] The positions of transformer 1 and power cabinet 3 correspond one to one. The upper inlet terminal 31 of the upper power regulating assembly is set on the side close to transformer 1, and the lower inlet terminal 38 of the lower power regulating assembly is set on the side close to transformer 1. The power cabinet 3 is connected from the back. The power cabinet 3 is designed to be connected from the side close to transformer 1. The upper and lower winding outlets of transformer 1 are aligned with the inlet terminals of power cabinet 3. The upper inlet terminal 31 is connected to the corresponding upper winding outlet through a straight busbar, and the lower inlet terminal 38 is connected to the corresponding lower winding outlet through a straight busbar. At this time, the busbar 2 between transformer 1 and power cabinet 3 does not need to be raised to an elevation of about 3.6 meters before connection. It is directly connected through a horizontal busbar, reducing the length of the vertical busbar by about 2.6 meters, and a total of 4.6 meters / per gear can be reduced. The reduction details of the busbar 2 system are shown in Table 1:

[0048] Table 1 Busbar system reduction details

[0049] Gear Busbar specifications Number of circuits Save rice Total meters 1 TMY 10*60 6 4.6 27.6 2 TMY 10*80 6 4.6 27.6 3 TMY 10*100 6 4.6 27.6 4 TMY 10*120 6 4.6 27.6 5 TMY 12*120 6 4.6 27.6 N TMY 12*120 6 4.6 27.6 total 165.6

[0050] The polysilicon reduction furnace power supply system provided by the utility model reduces the equipment footprint; saves the investment cost of the busbar 2; the upper and lower coil outgoing busbars 2 of the transformer 1 do not need to be lifted upward and arranged in a line, reducing the amount of copper bars used, thereby reducing the investment cost of the transformer 1; optimizes the layout of the power cabinet 3, reduces the failure rate, and facilitates maintenance.

[0051] On the basis of the above-mentioned specific embodiments, the power cabinet 3 includes a first power cabinet 30 and a second power cabinet 39. The power cabinet corresponding to the upper incoming line terminal 31 and the lower incoming line terminal 38 is the first power cabinet 30.

[0052] The three-phase transformer 1 also includes a top winding outlet terminal, which corresponds to a second power cabinet 39. The second power cabinet 39 is arranged side by side in front of the first power cabinet 30. The second power cabinet 39 adopts an upper incoming line and an upper outgoing line arrangement.

[0053] In a preferred embodiment, each phase of the three-phase power of the transformer 1 includes three coils, namely, an upper winding output terminal, a lower winding output terminal and a top winding output terminal, and the transformer low-voltage side has 9 coil outputs. Figure 7 shown.

[0054] The power cabinets corresponding to the upper and lower winding outlets of the transformer are the same as the above-mentioned 6 coil outputs, and the upper and lower winding outlets are connected to the corresponding first power cabinet 30. The top winding outlet is connected to the second power cabinet 39, and the second power cabinet 39 is arranged side by side in front of the corresponding first power cabinet 30. The second power cabinet 39 is in front and back contact with the first power cabinet 30 without an aisle in the middle. The second power cabinet 39 is provided with inspection doors on the left and right, and a controller and a display screen are provided in the front. The first power cabinet 30 and the second power cabinet 39 work independently.

[0055] In other words, the transformer has three phases, and the low-voltage side of each phase is divided into three coils at the bottom, top and top, corresponding to the bottom outlet terminal, the top outlet terminal and the top outlet terminal; corresponding to three stacked first power cabinets 30 and three vertical second power cabinets 39, and the top surfaces of the first power cabinets 30 and the second power cabinets 39 are flush. The second power cabinet 39 adopts the top incoming and outgoing arrangement, that is, the top incoming terminal and the top outgoing terminal connected to the reduction furnace are both arranged on the top surface of the second power cabinet 39, and the top winding outlet terminal of the transformer is connected from the top to the top incoming terminal on the top surface of the second power cabinet 39, and the top outgoing terminal on the top surface of the second power cabinet 39 is connected to the reduction furnace above, as shown in FIG. Figure 8 shown.

[0056] Compared with the prior art, the first power cabinet 30 and the second power cabinet 39 are arranged side by side without any gap in between, and the busbar from the top winding of the transformer to the top incoming line terminal of the second power cabinet 39 is the shortest, saving the investment cost of the busbar 2.

[0057] On the basis of the above-mentioned specific embodiments, an isolation wall is arranged between the transformer 1 and the power cabinet 3, and two long holes are opened on the isolation wall, which are respectively consistent with the height of the upper busbar and the lower busbar. The power cabinets 3 are arranged in sequence along the length direction of the isolation wall, and the horizontal positions of the winding outlet terminals and the corresponding incoming terminals are aligned. The power cabinet 3 is a cube, and the power cabinet 3 is close to the back of the transformer 1 and is in contact with the isolation wall. There is a maintenance passage between the power cabinets 3, and the power cabinet 3 is provided with inspection doors on the front parallel to the isolation wall and on the side perpendicular to the isolation wall.

[0058] In a specific embodiment, an isolation wall is provided between the transformer 1 and the power cabinet 3, the transformer 1 is located behind the isolation wall, and the power cabinet 3 is located in front of the isolation wall. The isolation wall divides the transformer 1 and the power cabinet 3 into two spaces to prevent the arc flash fault from spreading and causing the fault to expand.

[0059] The upper inlet terminal 31 is at the same level as the upper winding outlet terminal of the transformer 1, and the lower inlet terminal 38 is at the same level as the lower winding outlet terminal of the transformer 1. In addition, the connection line between the inlet terminal and the winding outlet terminal is perpendicular to the isolation wall, and the inlet terminal and the winding outlet terminal are aligned in left and right positions, that is, the upper inlet terminal 31 is horizontally aligned with the upper winding outlet terminal of the transformer 1, and the lower inlet terminal 38 is horizontally aligned with the lower winding outlet terminal of the transformer 1. The winding outlet terminal and the corresponding inlet terminal are horizontally aligned up and down and left and right, and there is a set distance between the winding outlet terminal and the corresponding inlet terminal.

[0060] Two long holes are opened on the isolation wall, and the long holes are along the length direction of the isolation wall. The power cabinets 3 are arranged in sequence along the length direction of the isolation wall, and the two long holes are arranged up and down, respectively consistent with the height of the upper busbar and the lower busbar. The incoming line terminal, the long hole and the winding outlet are at the same height, and the three points are collinear. The busbar 2 is connected from the winding outlet, passes through the long hole, and is connected to the incoming line terminal. The busbar 2 is perpendicular to the isolation wall. At this time, the relative length of the connecting busbar 2 of the power cabinet 3 and the transformer 1 is the shortest, which reduces the line loss of the busbar 2, reduces the investment cost of the busbar 2, and saves electricity costs.

[0061] The power cabinet 3 is a cube with a regular shape and is easy to process. The power cabinet 3 is close to the back of the transformer 1 and is in contact with the isolation wall. The power cabinet 3 is placed close to the isolation wall, which can not only keep the power cabinet 3 and the transformer 1 relatively isolated and independent in space, but also shorten the distance between the power cabinet 3 and the transformer 1 within a safe distance range. For example, the horizontal distance between the transformer 1 and the power cabinet 3 is set at about 1.2 meters. Compared with the horizontal bus 2 between the transformer 1 and the power cabinet 3 in the prior art, which is relatively short by 2 meters, the investment cost of the bus 2 is further reduced, the line loss of the bus 2 is reduced, and the electricity cost is saved.

[0062] There is a maintenance passage between adjacent power cabinets 3, that is, there is a maintenance passage on both the left and right sides of the power cabinet 3. Compared with the prior art in which multiple power cabinets 3 are arranged in parallel, the separately arranged power cabinets 3 can dissipate heat on all four sides, reducing internal heat accumulation and reducing the failure rate.

[0063] The power cabinet 3 is provided with inspection doors on the front parallel to the isolation wall and on the sides perpendicular to the isolation wall, that is, inspection doors are provided on both sides of the power cabinet 3 and in the front on the outside. During inspection and maintenance, inspection is carried out from the maintenance passages on both sides of the power cabinet 3 through the side inspection doors, and inspection is carried out from the front passage through the front inspection doors. Various components have many exposed parts at the three inspection doors, and inspection can be carried out on all three sides. Under normal circumstances, inspection and maintenance do not require entering the power cabinet 3 from the side doors for inspection, which makes operation more convenient and inspection and maintenance easy.

[0064] Based on the above-mentioned specific embodiments, the reduction furnace is located on the side of the power cabinet 3 away from the transformer 1, and the horizontal projection of the power cabinet 3 does not overlap with the horizontal projection of the water outlet of the reduction furnace; the outlet end of the power cabinet 3 is arranged at the top thereof, and the lead-out wire of the power cabinet 3 is connected to the bottom of the reduction furnace, and the power cabinet 3 and the reduction furnace are connected by a water-cooling cable.

[0065] In a specific embodiment, the reduction furnace and the power cabinet 3 are arranged in one space, and the reduction furnace is arranged in front of the power cabinet 3, that is, on the side away from the transformer 1. The horizontal projection of the power cabinet 3 does not overlap with the horizontal projection of the water outlet of the reduction furnace, and the power cabinet 3 is far away from the bottom of the reduction furnace to prevent water leakage from the reduction furnace into the power cabinet 3.

[0066] The outgoing line terminal of the power cabinet 3 is arranged at the top of the power cabinet 3, and the input terminal of the reduction furnace is arranged at the bottom of the reduction furnace. The reduction furnace is above the outer side of the power cabinet 3, and the lead-out line is connected from the top outgoing line terminal of the power cabinet 3 to the bottom input terminal of the reduction furnace. The outgoing line terminal of the power cabinet 3 is moved up to facilitate the connection with the input terminal of the reduction furnace above, shorten the length of the lead-out line, and reduce the cost of the lead-out line.

[0067] Preferably, the power cabinet 3 and the reduction furnace are connected via a water-cooled cable, which has a large current carrying capacity, good heat dissipation and low cost.

[0068] On the basis of the above-mentioned specific embodiments, the lead wires of the power cabinet 3 include horizontal lead wires led out from the lead wire terminal of the power cabinet 3 and vertical lead wires connected to the input terminal at the bottom of the reduction furnace;

[0069] The horizontal lead-out line connecting the power cabinet 3 in the middle is perpendicular to the isolation wall, and the horizontal lead-out line connecting the power cabinets 3 on both sides of the middle position has a concave bending section approaching the middle position.

[0070] In a specific embodiment, the lead wires of the power cabinet 3 include horizontal lead wires and vertical lead wires. The horizontal lead wires are led out from the lead wire terminals of the power cabinet 3 and extend horizontally toward the reduction furnace until they extend to just below the input terminal at the bottom of the reduction furnace. The lower end of the vertical lead wire is connected to the horizontal lead wire, and the upper end is connected to the input terminal at the bottom of the reduction furnace, thereby connecting the lead wire terminal of the power cabinet 3 and the input terminal of the reduction furnace. The lead wires are horizontal and vertical, which is convenient for maintenance.

[0071] The three points of the middle transformer 1, the middle power cabinet 3 and the reduction furnace are in a collinear line. The horizontal lead-out line connecting the middle power cabinet 3 is perpendicular to the isolation wall. The middle power cabinet 3 is closest to the reduction furnace, and the horizontal lead-out line is connected in a straight line. There is a distance difference between the power cabinets 3 on both sides of the middle position and the reduction furnace along the length direction of the isolation wall. In order to keep the horizontal lead-out line horizontally and vertically parallel, the horizontal lead-out line connecting the power cabinets 3 on both sides of the middle position is bent toward the middle position to form a concave bending section. The horizontal lead-out line at the outlet end of the concave bending section is close to the middle position, parallel to the horizontal lead-out line at the middle position and with a small interval. The horizontal lead-out lines connecting the power cabinets 3 on both sides of the middle position are close to the input end of the reduction furnace, which is convenient for connecting with the vertical lead-out line, and the connecting line is clear, which is convenient for troubleshooting.

[0072] It should be noted that when the power cabinet 3 is an odd number, the line connecting the middle power cabinet 3 and the reduction furnace is perpendicular to the isolation wall; when the power cabinet 3 is an even number, the line connecting the middle power cabinet 3 and the reduction furnace is perpendicular to the isolation wall.

[0073] In a preferred embodiment, in order to facilitate connection with horizontal lead-out lines at different positions, the vertical lead-out lines are not necessarily along the vertical direction, and the vertical lead-out lines are arranged at an angle to facilitate connection between the horizontal lead-out lines and the input end of the reduction furnace.

[0074] In a preferred embodiment, the lead-out line of the power cabinet 3 includes a vertical straight line segment led out from the lead-out end of the power cabinet 3 and a horizontal straight line segment connected to the input end at the bottom of the reduction furnace and supported by an insulating column.

[0075] The lead-out wire is first connected vertically upward and extended to the height of the input end of the reduction furnace bottom. The two ends of the horizontal straight line segment connect the input end of the vertical straight line segment reduction furnace. The horizontal straight line segment can be supported by an insulating column to prevent the horizontal straight line segment from sagging and causing poor contact.

[0076] On the basis of the above-mentioned specific embodiments, a busbar area 32, a fast-melting area 33 and a voltage regulating area 34 are provided in the upper power regulating assembly and the lower power regulating assembly according to functional divisions. The busbar area 32, the fast-melting area 33 and the voltage regulating area 34 are distributed in sequence from top to bottom. The power cabinet 3 also includes a starting area 35 and a control area 37 connected to the upper power regulating assembly and the lower power regulating assembly. The control area 37 is located above the starting area 35. The control area 37 and the starting area 35 are located at the front of the power cabinet 3. A control panel connected to the control area 37 is provided in front of the power cabinet 3. The busbar area 32, the fast-melting area 33 and the voltage regulating area 34 are located at the rear of the power cabinet 3.

[0077] In a specific embodiment, the upper power regulating assembly and the lower power regulating assembly are partitioned according to function. The upper power regulating assembly and the lower power regulating assembly are respectively provided with a busbar area 32, a fast-melting area 33 and a voltage regulating area 34. The busbar area 32, the fast-melting area 33 and the voltage regulating area 34 are distributed in sequence from top to bottom, and the functions are matched with the positions, so that wiring, maintenance and debugging are more targeted, reducing the difficulty of workers' work.

[0078] The power cabinet 3 further includes a starting area 35 and a control area 37 , which are connected to the upper power regulating component and the lower power regulating component to start and control the upper power regulating component and the lower power regulating component.

[0079] The control area 37 is located above the start area 35, and the height of the control area 37 is consistent with the height of the worker's hand for comfortable operation. The control area 37 and the start area 35 are located in the front of the power cabinet 3. A control panel connected to the control area 37 is provided in front of the power cabinet 3, which is convenient for front viewing and operation of the control panel. The busbar area 32, the fast-melting area 33 and the voltage regulating area 34 are located in the rear of the power cabinet 3, which is convenient for connection with the transformer 1, and the layout of the power cabinet 3 is optimized to reduce the failure rate and facilitate maintenance.

[0080] In a preferred embodiment, the upper power regulating assembly and the lower power regulating assembly are respectively provided with a busbar area 32, a fast-melting area 33, a voltage regulating area 34, a starting area 35 and a control area 37. The busbar area 32, the fast-melting area 33 and the voltage regulating area 34 of the upper power regulating assembly are distributed in sequence from top to bottom, and the busbar area 32, the fast-melting area 33 and the voltage regulating area 34 of the lower power regulating assembly are distributed in sequence from bottom to top. The control area 37 of the lower power regulating assembly is located above the starting area 35, and the control area 37 of the upper power regulating assembly is located below the starting area 35. The height of the control area 37 is consistent with the height at which the worker's hands can operate comfortably, and the operation is convenient.

[0081] On the basis of the above-mentioned specific embodiments, an isolation baffle 36 is provided between the multiple voltage levels of the fast melting zone 33 and the voltage regulating zone 34. The isolation baffle 36 separates the multiple voltage levels to prevent the arc flash fault from spreading and causing the fault to expand.

[0082] On the basis of the above-mentioned specific embodiments, it also includes a transverse guide rail installed on the ground, a longitudinal guide rail installed on the transverse guide rail and capable of moving laterally thereof, and a vertical lifting member installed on the longitudinal guide rail and capable of moving longitudinally thereof, and the transformer 1 is installed on the vertical lifting member; it also includes a position adjustment device for adjusting the position change of the transformer 1.

[0083] In a specific embodiment, the transverse guide rail is installed on the ground, and the transverse guide rail is along the direction of the busbar 2 and can be fixed by bolts. The longitudinal guide rail is along the length direction of the isolation wall, and the bottom of the longitudinal guide rail has a slider, which is inserted into the transverse guide rail. The slider can move along the transverse guide rail, thereby driving the longitudinal guide rail to move horizontally along the transverse guide rail, so as to achieve the front-to-back distance adjustment between the transformer 1 and the power cabinet 3. The bottom of the vertical lifting member also has a card block, which is inserted into the longitudinal guide rail. The card block can move longitudinally, thereby driving the vertical lifting member to move longitudinally along the longitudinal guide rail, and adjusting the horizontal alignment of the transformer 1 and the power cabinet 3. The transformer 1 is installed on the vertical lifting member, and the vertical lifting member can be lifted up and down to control the height of the transformer 1 and adjust the height alignment of the transformer 1 and the power cabinet 3, thereby achieving the horizontal, longitudinal and vertical position adjustment of the transformer 1, so that the winding outlet of the transformer 1 is aligned with the incoming terminal of the power cabinet 3.

[0084] The position adjustment device controls the position change of the transformer 1. The position of the transformer 1 is adjusted by the position adjustment device to achieve automatic alignment of the winding outlet of the transformer 1 and the incoming terminal of the power cabinet 3, with high alignment accuracy.

[0085] Based on the above specific embodiments, the position adjustment device includes:

[0086] A first position sensor for detecting the position of the winding outlet end;

[0087] A second position sensor for detecting the position of the incoming line terminal;

[0088] An adjusting mechanism connected to the first position sensor and the second position sensor for detecting when the winding outlet end is not aligned with the corresponding incoming line end, and adjusting the winding outlet end to a position aligned with the corresponding incoming line end.

[0089] In a specific embodiment, the first position sensor can be installed on the transformer 1 to detect the position of the winding outlet terminal. The second position sensor can be installed on the power cabinet 3 to detect the position of the incoming terminal.

[0090] The adjustment mechanism is connected to the first position sensor and the second position sensor. The first position sensor and the second position sensor send the detected position information to the adjustment mechanism. The adjustment mechanism compares the position of the winding outlet end with the corresponding incoming line end position, and detects whether the position of the winding outlet end is aligned with the corresponding incoming line end position. When the position of the winding outlet end is not aligned with the corresponding incoming line end position, the winding outlet end is adjusted to a position aligned with the corresponding incoming line end, with accurate positioning and convenient and quick adjustment.

[0091] Based on the above specific embodiments, the adjustment mechanism includes:

[0092] A receiving unit for receiving the winding outlet terminal position information detected by the first position sensor and the incoming terminal position information detected by the second position sensor;

[0093] A judging unit connected to the receiving unit and used to judge whether the position of the winding outlet end is aligned with the position of the corresponding incoming end;

[0094] An adjusting part connected to the judging unit and used for controlling the winding outlet end to be adjusted to a position aligned with the corresponding incoming line end when detecting that the position of the winding outlet end is not aligned with the position of the corresponding incoming line end.

[0095] In a specific embodiment, the adjustment mechanism includes a receiving unit, a judging unit and an adjusting part, wherein the receiving unit is used to receive the winding outlet position information detected by the first position sensor and the incoming line position information detected by the second position sensor.

[0096] The judging unit is connected to the receiving unit, and the receiving unit sends the winding outlet position information and the incoming line terminal position information to the judging unit. The judging unit compares whether the winding outlet position information and the incoming line terminal position information are consistent. If they are consistent, it is judged that the winding outlet position is aligned with the corresponding incoming line terminal position; if they are inconsistent, it is judged that the winding outlet position is not aligned with the corresponding incoming line terminal position.

[0097] The adjustment unit is connected to the judgment unit, and the judgment unit sends the result of whether the position of the winding outlet end is aligned with the corresponding incoming line end to the adjustment unit. When it is detected that the position of the winding outlet end is not aligned with the position of the corresponding incoming line end, the adjustment unit controls the winding outlet end to adjust to the position aligned with the corresponding incoming line end; when it is detected that the position of the winding outlet end is aligned with the position of the corresponding incoming line end, the adjustment unit keeps the position of the winding outlet end unchanged and keeps the position of the winding outlet end aligned with the corresponding incoming line end. The position of transformer 1 is automatically judged and adjusted, eliminating the need for workers to manually judge and adjust, and the position of transformer 1 is accurately adjusted.

[0098] Based on the above specific embodiments, the adjustment unit includes:

[0099] A calculation unit connected to the receiving unit, used for calculating the lateral, longitudinal and vertical adjustment distances of the transformer 1 according to the winding outlet position information and the corresponding incoming line terminal position information;

[0100] An adjustment execution unit connected to the calculation unit and used to control the movement of the transformer 1 according to the lateral, longitudinal and vertical adjustment distances calculated by the calculation unit.

[0101] In a preferred embodiment, the regulation unit includes a calculation unit and a regulation execution unit.

[0102] The calculation unit is connected to the receiving unit, and the receiving unit sends the winding outlet position information and the corresponding incoming line terminal position information to the calculation unit. The calculation unit calculates the winding outlet position and the corresponding incoming line terminal position to obtain the lateral, longitudinal and vertical adjustment distance values ​​of the transformer 1.

[0103] The adjustment execution unit is connected to the calculation unit, and the calculation unit sends the calculated lateral, longitudinal and vertical distance values ​​of the transformer 1 that need to be adjusted to the adjustment execution unit. The adjustment execution unit controls the transformer 1 to move horizontally, longitudinally and vertically respectively according to the lateral, longitudinal and vertical adjustment distances calculated by the calculation unit, so as to align the winding outlet end position with the corresponding incoming end position, and the control is convenient, accurate and fast in response.

[0104] In a preferred embodiment, the adjustment execution unit includes:

[0105] A power assembly for providing power;

[0106] A transmission component connected to the power component to realize the movement of the transformer 1. The transmission component can be a cylinder, an oil cylinder, or an electric push rod, which drives the transformer 1 to move along the guide rail and has a simple structure.

[0107] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0108] The above is a detailed introduction to the polysilicon reduction furnace power supply system provided by the utility model. This article uses specific examples to illustrate the principles and implementation methods of the utility model. The description of the above embodiments is only used to help understand the method and core ideas of the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model. Therefore, the utility model will not be limited to the embodiments shown in this article, but will conform to the widest range consistent with the principles and novel features disclosed in this article.

Claims

1. A polysilicon reduction furnace power supply system, characterized in that: The invention comprises a transformer (1), a power cabinet (3), and a busbar (2) connecting the winding outlet of the transformer (1) and the incoming terminal of the power cabinet (3); the power cabinet (3) comprises a lower power regulating assembly and an upper power regulating assembly stacked up and down; the upper winding outlet of the three-phase electricity of the transformer (1) is respectively connected to the upper incoming terminal (31) of the upper power regulating assembly of the corresponding power cabinet; the lower winding outlet of the three-phase electricity of the transformer (1) is connected to the lower incoming terminal (38) of the lower power regulating assembly of the corresponding power cabinet; the lower incoming terminal (38) and the lower incoming terminal (38) are arranged on a side close to the transformer (1); the upper incoming terminal (31) and the corresponding upper winding outlet are connected, as well as the lower incoming terminal (38) and the corresponding lower winding outlet are connected via a straight busbar.

2. The polysilicon reduction furnace power supply system according to claim 1, characterized in that: The power cabinet (3) comprises a first power cabinet (30) and a second power cabinet (39), wherein the power cabinet corresponding to the upper incoming line terminal (31) and the lower incoming line terminal (38) is the first power cabinet (30), The three-phase transformer (1) further comprises a top winding outlet terminal, the top winding outlet terminal corresponds to the second power cabinet (39), the second power cabinet (39) is arranged side by side in front of the first power cabinet (30), and the second power cabinet (39) adopts an upper incoming line and an upper outgoing line arrangement.

3. The polysilicon reduction furnace power supply system according to claim 2, characterized in that: An isolation wall is provided between the transformer (1) and the power cabinet (3), the isolation wall being provided with two long holes respectively having the same height as the upper busbar and the lower busbar, the power cabinets (3) being arranged in sequence along the length direction of the isolation wall, the horizontal positions of the winding outlet terminals and the corresponding inlet terminals being aligned, the power cabinets (3) being a cube, and the power cabinets (3) being close to the rear of the transformer (1) and in close contact with the isolation wall.

4. The polysilicon reduction furnace power supply system according to claim 3, characterized in that: A maintenance passage is provided between the power cabinets (3), and the power cabinets (3) are provided with inspection doors at the front side parallel to the isolation wall and at the side side perpendicular to the isolation wall.

5. The polysilicon reduction furnace power supply system according to claim 4, characterized in that: The reduction furnace is located on a side of the power cabinet (3) away from the transformer (1), and the horizontal projection of the power cabinet (3) does not overlap with the horizontal projection of the water outlet of the reduction furnace; the outlet terminal of the power cabinet (3) is arranged at the top thereof, the lead-out wire of the power cabinet (3) is connected to the bottom of the reduction furnace, and the power cabinet (3) and the reduction furnace are connected via a water-cooling cable.

6. The polysilicon reduction furnace power supply system according to claim 5, characterized in that: The lead wires of the power cabinet (3) include a horizontal lead wire led out from the lead wire terminal of the power cabinet (3) and a vertical lead wire connected to the input terminal at the bottom of the reduction furnace; The horizontal lead-out line connecting the power cabinet (3) in the middle is perpendicular to the isolation wall, and the horizontal lead-out lines connecting the power cabinets (3) on both sides of the middle position have a concave bending section approaching the middle position.

7. The polysilicon reduction furnace power supply system according to claim 1, characterized in that: The upper power regulating assembly and the lower power regulating assembly are provided with a busbar area (32), a fast-melting area (33) and a voltage regulating area (34) according to functional divisions. The busbar area (32), the fast-melting area (33) and the voltage regulating area (34) are sequentially arranged from top to bottom. The power cabinet (3) further comprises a starting area (35) and a control area (37) connected to the upper power regulating assembly and the lower power regulating assembly. The control area (37) is located above the starting area (35). The control area (37) and the starting area (35) are located at the front of the power cabinet (3). A control panel connected to the control area (37) is provided at the front of the power cabinet (3). The busbar area (32), the fast-melting area (33) and the voltage regulating area (34) are located at the rear of the power cabinet (3); An isolation baffle (36) is provided between the multiple voltage levels of the fast-melting zone (33) and the voltage-regulating zone (34).

8. The polysilicon reduction furnace power supply system according to any one of claims 1 to 7, characterized in that: It also includes a transverse guide rail installed on the ground, a longitudinal guide rail installed on the transverse guide rail and capable of moving laterally therefrom, and a vertical lifting member installed on the longitudinal guide rail and capable of moving longitudinally therefrom, wherein the transformer (1) is installed on the vertical lifting member; and it also includes a position adjustment device for adjusting the position change of the transformer (1).

9. The polysilicon reduction furnace power supply system according to claim 8, characterized in that: The position adjustment device comprises: A first position sensor for detecting the position of the winding outlet end; A second position sensor for detecting the position of the incoming line terminal; An adjusting mechanism connected to the first position sensor and the second position sensor, for detecting when the winding outlet end is not aligned with the corresponding incoming line end, and adjusting the winding outlet end to a position aligned with the corresponding incoming line end.

10. The polysilicon reduction furnace power supply system according to claim 9, characterized in that: The regulating mechanism comprises: A receiving unit for receiving the winding outlet terminal position information detected by the first position sensor and the incoming terminal position information detected by the second position sensor; A judging unit connected to the receiving unit and used to judge whether the position of the winding outlet end is aligned with the position of the corresponding incoming end; An adjusting part connected to the judging unit and used for controlling the winding outlet end to be adjusted to a position aligned with the corresponding incoming line end when detecting that the position of the winding outlet end is not aligned with the position of the corresponding incoming line end.

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