Consumption-reducing low-voltage lead arrangement structure of three-phase autotransformer

Abstract

The utility model 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 utility model relates to transformer lead arrangement field, especially a kind of three-phase autotransformer loss reduction type low-voltage lead arrangement structure. BACKGROUND

[0002] Three-phase autotransformer is a kind of autotransformer, it can have the connection group that is completely same to three-phase transformer, the difference is that there is electrical connection between its coil, mainly used in high-power power transmission substation.

[0003] In prior art, due to the single-phase capacity of this kind of transformer is large, voltage grade is low, low-voltage current is large, if the head of three-phase low-voltage coil is led out from low-voltage side according to the structure of single-phase transformer, it is easy to produce window current, at the same time, with the switch tapping line of medium voltage 220kV voltage grade gathered in coil end part, it will also increase lead loop current, these will increase additional loss and the possibility of partial discharge breakdown of transformer, damage the electrical performance and operation safety of transformer, at the same time, the lead in the area is usually fixed by pressing on the existing transformer, it is not easy to adjust the lead, lead is prone to wrinkle and bending, thereby leading to damage of insulation performance and decrease of use intensity.

[0004] Therefore, a three-phase autotransformer loss reduction type low-voltage lead arrangement structure is proposed to solve the above problems. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a three-phase autotransformer loss reduction type low-voltage lead arrangement structure to solve the above problems, and improving the problems of easy to produce window current and increase loss, and not easy to adjust lead.

[0006] The utility model realizes the above-mentioned purpose by the following technical scheme, a three-phase autotransformer loss reduction type low-voltage lead arrangement structure, including conducting row, two iron core frames and clamping mechanisms installed to its outer side, the outer side of the iron core frame at top is installed with a group of low-voltage bushings for butt joint with lead, the number of the clamping mechanism is nine, the clamping mechanism is arranged on conducting row and is used for clamping and adjusting lead, wherein, the clamping mechanism includes adjustable pressure block and pressure plate, one side of the pressure block is provided with recess, and the pressure plate is provided with convex point corresponding to the recess.

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

[0008] Preferably, a driving bar is installed on the outer side of the inclined bar, and the driving bar extends to the outer side of the driving bar, and a spring is installed between the inner part 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 beneficial effects of this utility model are:

[0014] 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.

[0015] 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

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the iron core frame and conductive busbar of this utility model;

[0018] Figure 3 for Figure 1 Enlarged view of A in the middle;

[0019] Figure 4 for Figure 2 Enlarged view of B in the middle;

[0020] Figure 5 This is a schematic diagram of the clamping mechanism of this utility model;

[0021] Figure 6 This is a schematic diagram of the inclined bar and spring of this utility model.

[0022] 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

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] In practical implementation: such as Figures 1-6 As shown, a three-phase autotransformer loss-reducing low-voltage lead arrangement structure includes a conductor bus 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 conductor bus 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.

[0025] 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.

[0026] 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.

[0027] When clamping and fixing the lead wire, the lead wire can be placed between the pressure block 310 and the pressure plate 320. Then, the drive protrusion 321 abuts against the lead wire to complete the fixing limit. When it is necessary to adjust the straightness of the lead wire, the user can move the corresponding inclined strip 331 according to the up and down adjustment direction to separate it from the corresponding inclined hole 111 on one of the upright plates 110. Then, the drive bar 330 can be moved to tighten the lead wire in that area. During its movement, the inclined strip 331 on the other upright plate 110 will press against the corresponding inclined hole 111 in sequence. After the adjustment is completed, the user can reset the moved inclined strip 331 and insert it into the corresponding inclined hole 111 to complete the fixing.

[0028] like Figure 4 , Figure 5 and Figure 6 As shown, a lever 332 extending to the outside of the drive bar 330 is installed on the outside of the diagonal bar 331, and a spring 333 is installed between the inside of the drive bar 330 and the diagonal bar 331.

[0029] Users can move the lever 332 to drive the inclined bar 331. After each use of the inclined bar 331, when the user releases the lever 332, the spring 333 can drive the inclined bar 331 to reset, which is convenient for the next adjustment.

[0030] like Figure 3 and Figure 5 As shown, the pressure plate 320 is threaded with an abutment bolt 322 that mates with the protrusion 321.

[0031] The user can rotate the contact bolt 322 to make the protrusion 321 fit against the outside of the lead wire, thus achieving the effect of limiting and fixing.

[0032] like Figure 3 and Figure 5 As shown, the pressure plate 320 is provided with an adjusting bolt 323, one end of which is threaded to the inside of the pressure block 310.

[0033] Users can adjust the distance between the pressure block 310 and the pressure plate 320 by rotating the adjusting bolt 323 in advance, according to the thickness of the lead wire used.

[0034] like Figure 5 As shown, a limit rod is installed on one side of the pressure plate 320, and one end of the limit rod is inserted into the interior of the pressure block 310.

[0035] The use of a limit rod ensures the stability of the connection between the pressure block 310 and the pressure plate 320, and reduces the possibility of accidental rotation of the pressure plate 320 during the use of the adjusting bolt 323.

[0036] 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 texture.

[0037] The use of rubber material with anti-slip texture effectively ensures the clamping and limiting effect on the lead wires, reducing the possibility of accidental lead wire displacement.

[0038] Working principle: 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 pass through the iron core frame 200 and the outside of the transformer body and lead to the corner of the low-voltage side. Then they are connected to the low-voltage bushing 210 to avoid the generation of through-window current, reduce the circulating current loss of the low-voltage lead wires, reduce additional losses, thereby reducing the transformer load loss and improving the electrical efficiency of the transformer.

[0039] Before clamping and fixing the lead wire, the user can pre-adjust the distance between the pressure block 310 and the pressure plate 320 by rotating the adjusting bolt 323 according to the thickness of the lead wire. Then, the lead wire can be placed between the pressure block 310 and the pressure plate 320. The user can rotate the abutting bolt 322 to make the protrusion 321 fit against the outside of the lead wire, thus completing the fixing and limiting. The rubber material with anti-slip texture can effectively ensure the clamping and limiting effect of the lead wire and reduce the accidental displacement of the lead wire. When it is necessary to adjust the straightness of the lead wire, the user can adjust the corresponding position according to the up and down adjustment direction. The inclined bar 331 is separated from the corresponding inclined hole 111 on one of the upright plates 110. Then, the drive bar 330 can be moved to tighten the lead wire in that area, reducing the occurrence of wrinkles and bends in the lead wire in a specific area, and ensuring insulation performance and strength. During its movement, the inclined bar 331 on the other upright plate 110 will be pressed against the corresponding inclined hole 111 in turn. The spring 333 will repeatedly compress and reset. After the adjustment is completed, the user can release the inclined bar 331 and use the corresponding spring 333 to reset it and insert it into the corresponding inclined hole 111 to complete the fixation.

[0040] It should be noted that when the lead wire is wrapped with copper tubing, the middle clamping mechanism 300 can be omitted, and the end clamping mechanism 300 in the corresponding area can be used to stretch the end, thereby completing the straightness adjustment.

[0041] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A low-voltage lead arrangement structure for a three-phase autotransformer with reduced losses, characterized in that, include: The conductor bus (100) has two iron core frames (200) mounted to its outer side, and a set of low-voltage bushings (210) for docking with the lead wires are mounted on the outer side of the top iron core frame (200). Nine clamping mechanisms (300) are provided on the conductive busbar (100) and are used to clamp and adjust the lead wires. The clamping mechanism (300) includes an adjustable pressure block (310) and a pressure plate (320) with a groove on one side. The pressure plate (320) is provided with protrusions (321) corresponding to the groove.

2. The three-phase autotransformer loss-reducing low-voltage lead arrangement structure according to claim 1, characterized in that: 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 outside of the conductive busbar (100). The opposite sides of two adjacent upright plates (110) are provided with inclined holes (111) that match the inclined bars (331).

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

4. The three-phase autotransformer loss-reducing low-voltage lead arrangement structure according to claim 1, characterized in that: The pressure plate (320) is threaded with an abutment bolt (322) that mates with the protrusion (321).

5. The three-phase autotransformer loss-reducing low-voltage lead arrangement structure according to claim 1, characterized in that: An adjusting bolt (323) is provided on the pressure plate (320), and one end of the adjusting bolt (323) is threaded to the inside of the pressure block (310).

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

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

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