Consumption-reducing low-voltage lead arrangement structure and method for three-phase autotransformer

Abstract

The invention relates to the field of transformer lead arrangement, in particular to a three-phase autotransformer consumption reduction type low-voltage lead arrangement structure which comprises a conducting bar, two iron core frames installed on the outer side of the conducting bar and a clamping mechanism, and a set of low-voltage sleeves used for being in butt joint with leads are installed on the outer side of the iron core frame on the top; the number of the clamping mechanisms is nine, and the clamping mechanisms are arranged on the conducting bar and used for clamping and adjusting a lead. Wherein the clamping mechanism comprises an adjustable pressing block and a pressing plate, a groove is formed in one side of the pressing block, and a convex point corresponding to the groove is arranged on the pressing plate; by adopting a specific lead wire mode, window-penetrating current is avoided, loss is reduced, the lead wire in a specific area can be clamped and fixed, meanwhile, straightness adjustment is carried out according to the penetrating condition, wrinkles and bending phenomena are reduced, and the insulating property and the use strength are ensured.

Description

Technical Field

[0001] The invention relates to the field of transformer lead arrangement, and in particular to a three-phase autotransformer consumption-reducing low-voltage lead arrangement structure and a method thereof. Background Art

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

[0003] In the prior art, since this type of transformer has a large single-phase capacity, a low voltage level, and a large low-voltage current, if the three-phase low-voltage coil outlet is led out from the low-voltage side according to the structure of a single-phase transformer, it is easy to generate window current. At the same time, the switch tap line of the medium voltage 220kV voltage level is gathered at the end of the coil, which will also increase the lead circulation current. These will increase the additional loss of the transformer and the possibility of local discharge breakdown, and damage the electrical performance and operation safety of the transformer. At the same time, the leads on the existing transformers are usually fixed by compression. It is not easy to adjust the leads used in this area, which makes the leads prone to wrinkles and bending, thereby damaging the insulation performance and reducing the use strength.

[0004] Therefore, a three-phase autotransformer consumption-reducing low-voltage lead arrangement structure and method thereof are proposed to solve the above-mentioned problems. Summary of the invention

[0005] The purpose of the present invention is to provide a three-phase autotransformer low-voltage lead arrangement structure and method for solving the above problems, thereby improving the problems of increased loss caused by window current and difficult adjustment of the leads.

[0006] The present invention achieves the above-mentioned purpose through the following technical solutions. The first aspect of the present invention provides a three-phase autotransformer low-voltage lead arrangement structure with reduced consumption, including a conductive bar, two core frames installed to the outside thereof and a clamping mechanism, and a group of low-voltage bushings for docking with the leads are installed on the outside of the top core frame; the number of the clamping mechanisms is nine, and the clamping mechanisms are arranged on the conductive bar and used to clamp and adjust the leads; wherein the clamping mechanism includes an adjustable pressure block and a pressure plate with a groove on one side, and the pressure plate is provided with a convex point corresponding to the groove.

[0007] Preferably, the clamping mechanism further comprises a driving bar, on which two oblique bars are slidably connected, six vertical plates are installed on the outer side of the conductive row, and opposite sides of two adjacent vertical plates are provided with oblique holes matching the oblique bars.

[0008] Preferably, a lever extending to the outside of the driving bar is installed on the outside of the oblique bar, and a spring is installed between the inside of the driving bar and the oblique bar.

[0009] Preferably, the pressure plate is threadedly connected with an abutment bolt that engages with the protrusion.

[0010] Preferably, an adjusting bolt is provided on the pressing plate, and one end of the adjusting bolt is threadedly connected to the interior of the pressing block.

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

[0012] Preferably, the material of the protrusions is rubber, and anti-slip grooves are arranged on the outer sides of the protrusions.

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

[0014] The beneficial effects of the present invention are:

[0015] 1. By setting the conductive bar and the core frame, and using the 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 of the conductive bar, and the lead wire is led from the core frame and the outside of the body to the corner outlet of the low-voltage side and connected to the low-voltage bushing to avoid the generation of window current, reduce the low-voltage lead wire circulation loss, and reduce additional loss;

[0016] 2. By setting the driving strip, after the pressure block and the pressure plate limit the lead, the corresponding oblique strip and the oblique hole can be used to adjust the position of the pressure block, thereby driving a single area on the lead to move, thereby achieving the straightness adjustment function, reducing the wrinkles and bending of the lead in a specific area, and ensuring the insulation performance and usage strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention;

[0018] Figure 2 It is a schematic diagram of the structure of the core frame and the conductive bar of the present invention;

[0019] Figure 3 for Figure 1 A magnified view of middle;

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

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

[0022] Figure 6 It is a schematic diagram of the structure of the inclined strip and the spring of the present invention.

[0023] In the figure: 100, conductive bar; 110, vertical plate; 111, oblique hole; 200, core frame; 210, low-voltage bushing; 300, clamping mechanism; 310, pressure block; 320, pressure plate; 321, convex point; 322, abutment bolt; 323, adjusting bolt; 330, driving bar; 331, oblique bar; 332, lever; 333, spring. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] When implementing: Figure 1-6 As shown, a three-phase autotransformer consumption-reducing low-voltage lead arrangement structure and method thereof include a conductive bar 100, two core frames 200 installed on the outside thereof, and a clamping mechanism 300, a group of low-voltage bushings 210 for docking with the lead wires are installed on the outside of the top core frame 200, the number of the clamping mechanisms 300 is nine, the clamping mechanisms 300 are arranged on the conductive bar 100 and are used to clamp and adjust the lead wires; wherein the clamping mechanism 300 includes an adjustable pressing block 310 with a groove on one side and a pressing plate 320, and the pressing plate 320 is provided with a protrusion 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 driving bar 330 , on which two oblique bars 331 are slidably connected. Six vertical plates 110 are installed on the outer side of the conductive bar 100 , and oblique holes 111 matching the oblique bars 331 are opened on the opposite sides of two adjacent vertical plates 110 .

[0027] The clamping mechanism 300 is used to limit the position of the wires along the line, and the low-voltage coil leads are led out from the upper and lower ends of the high-voltage side of the conductive bar 100, and the leads are led from the core frame 200 and the outside of the body to the corner of the low-voltage side, and then connected to the low-voltage bushing 210 to avoid the generation of window current, reduce the low-voltage lead circulation loss, reduce additional loss, thereby reducing the transformer load loss and improving the transformer electrical efficiency;

[0028] When clamping and fixing the lead, the lead can be placed between the pressure block 310 and the pressure plate 320, and then the protrusion 321 is driven to contact the lead to complete the fixed limit. When the straightness of the lead needs to be adjusted, the user can adjust the up and down directions to move the corresponding inclined bar 331 at the corresponding position to separate it from the corresponding inclined hole 111 on one vertical plate 110, and then the driving bar 330 can be moved to tighten the lead in the area. During the movement, the inclined bar 331 on the other vertical plate 110 will be squeezed with the corresponding inclined hole 111 in turn. After the adjustment is completed, the user can reset the moved inclined bar 331 to insert it into the corresponding inclined hole 111 to complete the fixation.

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

[0030] The user can move the inclined bar 331 by moving the lever 332. After the inclined bar 331 is moved and used each time, when the user releases the lever 332, the spring 333 can be used to drive the inclined bar 331 to return to its original position, so as to facilitate the next adjustment.

[0031] like Figure 3 and Figure 5 As shown, the pressing plate 320 is threadedly connected with an abutting bolt 322 that abuts against the protrusion 321 .

[0032] The user can rotate the abutment bolt 322 to drive the protrusion 321 to fit and abut against the outside of the lead wire to achieve a limiting and fixing effect.

[0033] like Figure 3 and Figure 5 As shown, an adjusting bolt 323 is disposed on the pressing plate 320 , and one end of the adjusting bolt 323 is threadedly connected to the interior of the pressing block 310 .

[0034] The user can rotate the adjustment bolt 323 in advance according to the thickness of the lead wire to adjust the distance between the pressing block 310 and the pressing plate 320 .

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

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

[0037] like Figure 5 As shown, the material of the protrusion 321 is rubber, and the outer side of the protrusion 321 is provided with anti-slip grooves.

[0038] The use of rubber material with anti-slip patterns can effectively ensure the wire pressing and limiting effect on the lead and reduce the accidental deviation of the lead.

[0039] Working principle: The clamping mechanism 300 is used to limit the position of the wires along the line, and the low-voltage coil leads are led out from the upper and lower ends of the high-voltage side of the conductive bar 100, and the leads are led from the core frame 200 and the outside of the body to the corner of the low-voltage side, and then connected with the low-voltage bushing 210 to avoid the generation of window current, reduce the low-voltage lead circulation loss, reduce additional loss, thereby reducing the transformer load loss and improving the transformer electrical efficiency;

[0040] Before clamping and fixing the lead, the user can pre-rotate the adjustment bolt 323 according to the thickness of the lead to adjust the distance between the pressure block 310 and the pressure plate 320, and then the lead can be placed between the pressure block 310 and the pressure plate 320. The user can rotate the contact bolt 322 to drive the convex point 321 to fit and contact the outside of the lead to complete the fixed limit. The use of rubber material with anti-slip patterns can effectively ensure the pressure limit 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 position according to the up and down adjustment direction. The inclined strip 331 is separated from the corresponding inclined hole 111 on one vertical plate 110, and then the driving strip 330 can be moved to drive the lead wire in the area to be tightened, thereby reducing the wrinkling and bending of the lead wire in the specific area, and ensuring the insulation performance and use strength. During the movement, the inclined strip 331 on the other vertical plate 110 will be squeezed with the corresponding inclined hole 111 in turn, and the spring 333 repeatedly compresses and resets. After the adjustment is completed, the user can loosen the inclined strip 331 and use the corresponding spring 333 to drive it to reset, so that it can be inserted into the corresponding inclined hole 111 to complete the fixation;

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

[0042] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A three-phase autotransformer low-voltage lead arrangement structure with reduced consumption, characterized in that: include: A conductive bar (100) and two core frames (200) mounted on the outside thereof, wherein a group of low-voltage bushings (210) for connecting with the lead wires are mounted on the outside of the top core frame (200); A clamping mechanism (300), the number of the clamping mechanisms (300) being nine, the clamping mechanisms (300) being arranged on the conductive bar (100) and used for clamping and adjusting the lead wires; The clamping mechanism (300) comprises an adjustable pressing block (310) with a groove on one side and a pressing plate (320), and the pressing plate (320) is provided with a convex point (321) corresponding to the groove.

2. The three-phase autotransformer consumption-reducing low-voltage lead arrangement structure according to claim 1, characterized in that: The clamping mechanism (300) further comprises a driving bar (330), on which two oblique bars (331) are slidably connected, six vertical plates (110) are installed on the outer side of the conductive bar (100), and oblique holes (111) matching the oblique bars (331) are provided on opposite sides of two adjacent vertical plates (110).

3. A three-phase autotransformer consumption-reducing low-voltage lead arrangement structure according to claim 2, characterized in that: A lever (332) extending to the outside of the driving bar (330) is installed on the outside of the inclined bar (331), and a spring (333) is installed between the inside of the driving bar (330) and the inclined bar (331).

4. The three-phase autotransformer consumption-reducing low-voltage lead arrangement structure according to claim 1, characterized in that: The pressing plate (320) is threadedly connected with a contact bolt (322) that is butted against the protrusion (321).

5. The three-phase autotransformer consumption-reducing low-voltage lead arrangement structure according to claim 1, characterized in that: The pressing plate (320) is provided with an adjusting bolt (323), and one end of the adjusting bolt (323) is threadedly connected to the interior of the pressing block (310).

6. The three-phase autotransformer consumption-reducing low-voltage lead arrangement structure according to claim 1, characterized in that: A limiting rod is installed on one side of the pressing plate (320), and one end of the limiting rod is inserted into the interior of the pressing block (310).

7. The three-phase autotransformer consumption-reducing low-voltage lead arrangement structure according to claim 1, characterized in that: The material of the protrusion (321) is rubber, and the outer side of the protrusion (321) is provided with anti-slip grooves.

8. A method for arranging low-voltage leads of a three-phase autotransformer with reduced consumption, characterized in that: An arrangement device including any one of 1-7 above is based on the conductive bar and the core frame, and a clamping mechanism is used to guide the lead wire, so that the low-voltage coil head is led out from the upper and lower ends of the high-voltage side of the conductive bar respectively, and the lead wire bypasses the core frame and the outside of the device body to the low-voltage side corner to connect with the low-voltage bushing.

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