Three-phase autotransformer low-voltage lead arrangement structure with reduced consumption and method thereof

Abstract

The present application relates to the field of transformer lead arrangement, specifically to a three-phase autotransformer energy-saving low-voltage lead arrangement structure, including a conductive row, two iron core frames and clamping mechanisms installed to the outer side thereof, a group of low-voltage bushings for butt joint with the lead are installed to the outer side of the top iron core frame; the number of the clamping mechanisms is nine, the clamping mechanisms are arranged on the conductive row and used for clamping and adjusting the lead; wherein the clamping mechanism includes an adjustable pressure block with a recess on one side and a pressure plate, the pressure plate is provided with a protrusion corresponding to the recess; a specific lead mode is adopted to avoid generating window current, reduce loss, and the lead in a specific area can be clamped and fixed, the straightness is adjusted according to the penetration condition, the wrinkle and bending phenomenon are reduced, and the insulation performance and use strength are ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of transformer lead arrangement, in particular to a three-phase autotransformer energy-saving low-voltage lead arrangement structure and method thereof. BACKGROUND

[0002] The three-phase autotransformer is a kind of autotransformer, which can have a complete connection group as a three-phase transformer, and the difference is that there is an electrical connection between the coils, mainly used in high-power power transmission and transformation occasions.

[0003] In the prior art, due to the large single-phase capacity of such transformers, the low-voltage current is large, and the low-voltage coil head of the three-phase transformer is easy to produce window current if it is drawn out from the low-voltage side according to the structure of the single-phase transformer. At the same time, the switch tapping line with a voltage level of 220kV is gathered at the end of the coil, which will increase the circulating current of the lead, which will increase the additional loss of the transformer and the possibility of partial discharge breakdown, damage the electrical performance and operation safety of the transformer. At the same time, the existing transformer usually adopts compression fixation for the lead, and it is not easy to adjust the lead for the use of the lead in this area, which leads to the phenomenon of wrinkles and bending of the lead, thereby causing damage to the insulation performance and reducing the use strength.

[0004] Therefore, a three-phase autotransformer energy-saving low-voltage lead arrangement structure and method thereof are proposed to solve the above problems. SUMMARY

[0005] The purpose of the present application is to provide a three-phase autotransformer energy-saving low-voltage lead arrangement structure and method thereof to solve the above problems and improve the problems of easy production of window current, increased loss and difficult adjustment of lead.

[0006] The present application realizes the above-mentioned purpose through the following technical scheme, and the present application provides a three-phase autotransformer energy-saving low-voltage lead arrangement structure in the first aspect, which comprises a conductive row, two iron core frames and clamping mechanisms mounted to the outer side thereof, a group of low-voltage bushings for butt joint with the lead is mounted on the outer side of the top iron core frame; the number of the clamping mechanisms is nine, the clamping mechanisms are arranged on the conductive row and used for clamping and adjusting the lead; wherein the clamping mechanism comprises an adjustable pressure block with a recess on one side and a pressure plate, and the pressure plate is provided with a protrusion corresponding to the recess.

[0007] Preferably, the clamping mechanism further comprises a driving bar, two inclined bars are slidably connected to the driving bar, six vertical plates are mounted on the outer side of the conductive row, and inclined holes matched with the inclined bars are formed on the opposite sides of the adjacent two vertical plates.

[0008] Preferably, a lever is mounted on the outer side of the inclined bar and extends to the outer side of the driving bar, and a spring is mounted between the inner side of the driving bar and the inclined bar.

[0009] Preferably, the pressure plate is threaded with an abutting bolt that mates with the protrusion.

[0010] Preferably, the pressure plate is provided with an adjusting bolt, one end of which is threaded to the inside of the pressure block.

[0011] Preferably, a limit rod is installed on one side of the pressure plate, and one end of the limit rod is inserted into the interior of the pressure block.

[0012] Preferably, the protrusion is made of rubber, and the outer side of the protrusion is provided with anti-slip texture.

[0013] The second aspect of the present invention provides a method for arranging low-voltage leads of a three-phase autotransformer with reduced losses, including the above-mentioned arrangement device. Based on the conductor busbar and the core frame, a clamping mechanism is used to guide the leads, and the low-voltage coil leads are led out from the upper and lower ends of the high-voltage side on the conductor busbar respectively. The leads are led out from the outside of the core frame and the transformer body to the corner of the low-voltage side and connected to the low-voltage bushing.

[0014] The beneficial effects of this invention are:

[0015] 1. By setting up a conductive busbar and an iron core frame, and using a clamping mechanism to guide the lead wire, the low-voltage coil outlet is led out from the upper and lower ends of the high-voltage side on the conductive busbar respectively. The lead wire is led out from the iron core frame and the outside of the transformer body to the corner of the low-voltage side and connected to the low-voltage bushing. This avoids the generation of through-window current, reduces the circulating current loss of the low-voltage lead wire, and reduces additional losses.

[0016] 2. By setting a drive bar, after the pressure block and pressure plate limit the lead wire, the position of the pressure block can be adjusted by using the corresponding inclined bar and inclined hole to drive the movement of a single area on the lead wire, thereby achieving the straightness adjustment function, reducing the occurrence of wrinkles and bends in specific areas of the lead wire, and ensuring insulation performance and service strength. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention;

[0018] Figure 2 This is a schematic diagram of the iron core frame and conductive busbar of the present invention;

[0019] Figure 3 for Figure 1 Enlarged view of A in the middle;

[0020] Figure 4 for Figure 2 Enlarged view of B in the middle;

[0021] Figure 5 This is a schematic diagram of the clamping mechanism of the present invention;

[0022] Figure 6 This is a schematic diagram of the oblique bar and spring of the present invention.

[0023] In the diagram: 100, conductive bar; 110, vertical plate; 111, oblique hole; 200, iron core frame; 210, low-voltage bushing; 300, clamping mechanism; 310, pressure block; 320, pressure plate; 321, protrusion; 322, contact bolt; 323, adjusting bolt; 330, drive bar; 331, oblique bar; 332, lever; 333, spring. Detailed Implementation

[0024] 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, and 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.

[0025] In practical implementation: such as Figures 1-6 As shown, a three-phase autotransformer loss-reducing low-voltage lead arrangement structure and method includes a conductive busbar 100, two iron core frames 200 installed on its outer side, and clamping mechanisms 300. A set of low-voltage bushings 210 for connecting with the leads are installed on the outer side of the top iron core frame 200. There are nine clamping mechanisms 300. The clamping mechanisms 300 are set on the conductive busbar 100 and are used to clamp and adjust the leads. The clamping mechanism 300 includes an adjustable pressure block 310 with a groove on one side and a pressure plate 320. The pressure plate 320 is provided with protrusions 321 corresponding to the groove.

[0026] like Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the clamping mechanism 300 also includes a drive bar 330, on which two inclined bars 331 are slidably connected. Six upright plates 110 are installed on the outer side of the conductive busbar 100. An inclined hole 111 matching the inclined bar 331 is opened on the opposite side of two adjacent upright plates 110.

[0027] The clamping mechanism 300 limits the movement of the low-voltage coil, and leads the low-voltage coil out from the upper and lower ends of the high-voltage side of the conductor bus 100. The lead wires are led out from the iron core frame 200 and the outside of the transformer body to the corner of the low-voltage side, and then connected to the low-voltage bushing 210. This avoids the generation of through-window current, reduces the circulating current loss of the low-voltage lead wire, reduces additional losses, thereby reducing the transformer load loss and improving the electrical efficiency of the transformer.

[0028] When the lead is fixed, the lead can be placed between the pressing block 310 and the pressing plate 320, and then the convex point 321 is driven to abut against the lead to complete the fixing and limiting. When the straightness of the lead needs to be adjusted, the user can adjust the corresponding inclined bar 331 according to the up-down adjustment direction, so that the inclined bar 331 is separated from the corresponding inclined hole 111 on the stand plate 110, and then the driving bar 330 can be adjusted to move and tighten the lead in the region. In the moving process, the inclined bar 331 on the other stand plate 110 will be pressed in the corresponding inclined hole 111 in sequence. After the adjustment is completed, the user can reset the inclined bar 331 to be inserted into the corresponding inclined hole 111, and the fixing is completed.

[0029] As shown in Figure 4 , Figure 5 and Figure 6 , the outer side of the inclined bar 331 is provided with a lever 332 extending to the outside of the driving bar 330, and a spring 333 is installed between the inside of the driving bar 330 and the inclined bar 331.

[0030] The user can adjust the inclined bar 331 by adjusting the lever 332. After each use of the inclined bar 331 is completed, the user can reset the inclined bar 331 by using the spring 333 when the lever 332 is released, so as to facilitate the next adjustment and use.

[0031] As shown in Figure 3 and Figure 5 , the pressing plate 320 is threadedly connected with an abutting bolt 322 which is connected with the convex point 321.

[0032] The user can rotate the abutting bolt 322 to make the convex point 321 abut against the outside of the lead, so as to achieve the limiting and fixing effect.

[0033] As shown in Figure 3 and Figure 5 , the pressing plate 320 is provided with an adjusting bolt 323, one end of which is threadedly connected to the inside of the pressing block 310.

[0034] The user can pre-rotate the adjusting bolt 323 according to the thickness of the lead in use, so as to adjust the distance between the pressing block 310 and the pressing plate 320.

[0035] As shown in Figure 5 , a limiting rod is installed on one side of the pressing plate 320, one end of which is inserted into the inside of the pressing block 310.

[0036] The limiting rod is provided to ensure the stability of the connection between the pressing block 310 and the pressing plate 320, and to reduce the accidental rotation of the pressing plate 320 during the use of the adjusting bolt 323.

[0037] As shown in Figure 5 , the convex point 321 is made of rubber, and the outside of the convex point 321 is provided with anti-skid lines.

[0038] The rubber material is matched with the anti-skid line to effectively ensure the line limiting effect of the lead, and reduce the accidental deviation of the lead.

[0039] Working principle: The low-voltage coil head is led out from the upper and lower ends of the high-voltage side of the conductive row 100, and the lead wire is wound around the iron core frame 200 and the outer side of the body to the low-voltage side corner, and then connected with the low-voltage sleeve 210, to avoid the window current and reduce the low-voltage lead circulation loss and additional loss, thereby reducing the transformer load loss and improving the electrical efficiency of the transformer.

[0040] Before clamping and fixing the lead, the user can rotate the adjusting bolt 323 according to the thickness of the lead, adjust the distance between the pressing block 310 and the pressing plate 320, and then place the lead between the pressing block 310 and the pressing plate 320. The user can rotate the contact bolt 322 to make the convex point 321 contact and resist the outside of the lead, complete the fixing and limiting, and the rubber material matched with the anti-skid line can effectively ensure the line limiting effect of the lead and reduce the accidental deviation of the lead. When the straightness of the lead needs to be adjusted, the user can adjust the corresponding inclined bar 331 according to the up and down adjustment direction, so that it is separated from the corresponding inclined hole 111 on one stand 110, and then the driving bar 330 is moved to tighten the lead in the area and reduce the wrinkles and bending of the lead in the specific area, to ensure the insulation performance and use strength. During the movement, the inclined bar 331 on the other stand 110 will be pressed in turn with the corresponding inclined hole 111, and the spring 333 will repeatedly compress and reset. After the adjustment is completed, the user can release the inclined bar 331, and the corresponding spring 333 drives it to reset and insert it into the corresponding inclined hole 111 to complete the fixing.

[0041] It should be noted that when the lead is wrapped with a copper pipe, the middle clamping mechanism 300 can be discarded, and the clamping mechanism 300 at the end of the corresponding area is used to stretch the end, thereby completing the straightness adjustment.

[0042] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be combined appropriately to form other embodiments that those skilled in the art can understand.

Claims

1. A three-phase autotransformer loss-reduction low-voltage lead arrangement, characterized by, The utility model relates to a kind of low-voltage coil winding device, including: Conductive row (100) with two iron core frames (200) mounted to its outer side, the outer side of top the iron core frame (200) is mounted with a set of low-voltage bushing (210) for interfacing with lead wire; Clamping mechanism (300), the number of the clamping mechanism (300) is nine, the clamping mechanism (300) is arranged on conductive row (100) and is used to clamp adjustment to lead wire; Wherein, the clamping mechanism (300) includes adjustable and recessed groove on one side the pressing block (310) and pressing plate (320), the pressing plate (320) is provided with convex point (321) corresponding with recessed groove; Wherein, the clamping mechanism (300) further includes drive bar (330), two inclined bars (331) are slidably connected on the drive bar (330), the outer side of the conductive row (100) is mounted with six vertical plates (110), the opposite sides of adjacent two vertical plates (110) are all provided with inclined hole (111) matched with inclined bar (331); Wherein, the outer side of the inclined bar (331) is mounted with the lever (332) extending to the outer side of the drive bar (330), spring (333) is mounted between the inner portion of the drive bar (330) and the inclined bar (331); Wherein, the pressing plate (320) is provided with adjusting bolt (323), one end of the adjusting bolt (323) is threadedly connected to the inner portion of the pressing block (310).

2. A three-phase autotransformer reduced-loss low-voltage lead arrangement according to claim 1, characterized in that: The pressing plate (320) is threadedly connected with the abutting bolt (322) for interfacing with convex point (321).

3. A three-phase autotransformer reduced-loss low-voltage lead arrangement according to claim 1, characterized in that: The side of the pressing plate (320) is mounted with limit rod, one end of the limit rod is inserted into the inner portion of the pressing block (310).

4. A three-phase autotransformer reduced-loss low-voltage lead arrangement according to claim 1, characterized in that: The material of the convex point (321) is rubber, and the outer side of the convex point (321) is provided with anti-skid lines.

5. A method of arranging a low-voltage lead of a three-phase autotransformer with reduced losses, characterized in that, The utility model relates to a kind of low-voltage coil winding device, including: Conductive row (100) with two iron core frames (200) mounted to its outer side, the outer side of top the iron core frame (200) is mounted with a set of low-voltage bushing (210) for interfacing with lead wire; Clamping mechanism (300), the number of the clamping mechanism (300) is nine, the clamping mechanism (300) is arranged on conductive row (100) and is used to clamp adjustment to lead wire; Wherein, the clamping mechanism (300) includes adjustable and recessed groove on one side the pressing block (310) and pressing plate (320), the pressing plate (320) is provided with convex point (321) corresponding with recessed groove; Wherein, the clamping mechanism (300) further includes drive bar (330), two inclined bars (331) are slidably connected on the drive bar (330), the outer side of the conductive row (100) is mounted with six vertical plates (110), the opposite sides of adjacent two vertical plates (110) are all provided with inclined hole (111) matched with inclined bar (331); Wherein, the outer side of the inclined bar (331) is mounted with the lever (332) extending to the outer side of the drive bar (330), spring (333) is mounted between the inner portion of the drive bar (330) and the inclined bar (331); Wherein, the pressing plate (320) is provided with adjusting bolt (323), one end of the adjusting bolt (323) is threadedly connected to the inner portion of the pressing block (310). The pressing plate (320) is threadedly connected with the abutting bolt (322) for interfacing with convex point (321). The side of the pressing plate (320) is mounted with limit rod, one end of the limit rod is inserted into the inner portion of the pressing block (310). The material of the convex point (321) is rubber, and the outer side of the convex point (321) is provided with anti-skid lines.

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