CN216015024U - Oil circulation type large-current hollow conductive tube for transformer - Google Patents

Abstract

The utility model discloses a hollow contact tube of oil circulation formula heavy current for transformer belongs to transformer technical field, include: the cable comprises an external connection terminal, a copper pipe, an epoxy resin insulation layer, an internal connection terminal and a reinforcing ring, wherein the reinforcing ring is sleeved outside the copper pipe and welded on the copper pipe, and epoxy resin is injected on the outer wall of the copper pipe welded with the reinforcing ring to form the epoxy resin insulation layer; the external connecting terminal and the internal connecting terminal are respectively welded at two ends of the copper pipe. The utility model discloses a copper pipe is as the main part of hollow conductive tube, dispels the heat with transformer oil through the oil cycle inside the hollow conductive tube, can effectively reduce the temperature of conductive tube, solves the problem that present transformer heavy current conductive tube generates heat, simultaneously because the conductive tube is the great reduction of hollow structure weight, practices thrift a large amount of manufacturing cost. The reinforcing ring is welded on the outer side of the conductive tube, so that the contact area of epoxy resin pressure injection is increased, and the problems of epoxy resin cracking and oil leakage of the conductive tube can be effectively reduced.

Description

Oil circulation type large-current hollow conductive tube for transformer

Technical Field

The utility model belongs to the technical field of the transformer technique and specifically relates to a hollow contact tube of oil circulating type heavy current for transformer is related to.

Background

The existing oil-immersed transformer is processed by adopting a solid copper bar, and the defects of poor heat dissipation, easy cracking and poor sealing in the epoxy resin injection process or the using process and high cost of a large-current product generally exist. The development of a large-current oil circulation type hollow conductive tube for an oil-immersed transformer is urgently needed.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a transformer is with hollow contact tube of oil circulating formula heavy current for solve present oil-immersed transformer heavy current product heat dissipation bad, epoxy pressure annotate the easy fracture and sealed not tight phenomenon, with high costs scheduling problem appear in process or the use.

In order to achieve the above purpose, the utility model adopts the following technical scheme: oil circulating type large-current hollow conductive tube for transformer, which is characterized by comprising: the cable comprises an external connection terminal, a copper pipe, an epoxy resin insulation layer, an internal connection terminal and a reinforcing ring, wherein the reinforcing ring is sleeved outside the copper pipe and welded on the copper pipe, and epoxy resin is injected on the outer wall of the copper pipe welded with the reinforcing ring to form the epoxy resin insulation layer; the external connecting terminal and the internal connecting terminal are respectively welded at two ends of the copper pipe.

Further, the number of the reinforcing rings is at least one.

According to the utility model discloses a concrete embodiment, the surface at the both ends of copper pipe is reserved respectively has the opening that is used for holding external connection terminal and internal connection terminal, and two open-ended widths are unanimous with external connection terminal and internal connection terminal thickness respectively, and external connection terminal and internal connection terminal arrange in respectively two openings and weld in the copper pipe.

Through the above design scheme, the utility model discloses following beneficial effect can be brought: the utility model discloses a copper pipe is as the main part of hollow conductive tube, dispels the heat with transformer oil through the oil cycle inside the hollow conductive tube, can effectively reduce the temperature of conductive tube, solves the problem that present transformer heavy current conductive tube generates heat, simultaneously because the conductive tube is the great reduction of hollow structure weight, practices thrift a large amount of manufacturing cost. At least one reinforcing ring is welded on the outer side of the conductive tube, so that the contact area of epoxy resin pressure injection is increased, and the problems of epoxy resin cracking and oil leakage of the conductive tube can be effectively reduced.

Drawings

The accompanying drawings description herein is provided to provide a further understanding of the invention and constitute a part of the application of the invention, and the exemplary embodiments and descriptions thereof are used for understanding the invention and do not constitute undue limitations of the invention in the drawings:

fig. 1 is a front view of the oil circulation type large-current hollow conductive tube for the transformer of the present invention.

Fig. 2 is a partial view of the oil circulation type large-current hollow conductive tube for transformer and the assembly of the transformer oil tank of the utility model.

Fig. 3 is a partial view of the oil circulation type large current hollow conductive tube for the transformer of the present invention.

In the figure: 1-external connection terminal, 2-copper tube, 3-epoxy resin insulation layer, 4-internal connection terminal, 5-reinforcing ring; 6-tank wall of the transformer tank; 7-oil circulation inlet and outlet.

Detailed Description

In order to make the objects, features and advantages of the present invention more obvious and understandable, the embodiments of the present invention are clearly and completely described with reference to the drawings. Obviously, the present invention is not limited by the following embodiments, and specific embodiments can be determined according to the technical solution and practical circumstances of the present invention.

The utility model provides a transformer is with oily circulating heavy current hollow contact tube mainly used transformer inside and outside through connection spare, with the inside heavy current that produces or the outside heavy current that produces pass through the contact tube conduction, as shown in figure 1, figure 2 and figure 3, transformer is with oily circulating heavy current hollow contact tube includes external terminal 1, copper pipe 2, epoxy insulating layer 3, interior wiring terminal 4 and reinforcing ring 5, reinforcing ring 5 cover is established outside copper pipe 2 and is welded on copper pipe 2, presses the epoxy of notes on the outer wall of the welded copper pipe 2 that has reinforcing ring 5 and forms epoxy insulating layer 3; the external connection terminal 1 and the internal connection terminal 4 are welded to both ends of the copper pipe 2, respectively.

The number of said reinforcement loops 5 is at least one.

According to the utility model discloses a concrete embodiment, the surface at copper pipe 2's both ends is reserved respectively has the opening that is used for holding external connection terminal 1 and internal connection terminal 4, and two open-ended widths are unanimous with external connection terminal 1 and internal connection terminal 4 thickness respectively, and external connection terminal 1 and internal connection terminal 4 are arranged in two openings respectively and are welded at copper pipe 2.

The manufacturing process of the oil circulation type large-current hollow conductive tube for the transformer is as follows:

step one, sleeving a reinforcing ring 5 on an epoxy resin injection part of a copper pipe 2 and welding, wherein a circle of welding is required to be fully welded along a contact part of the reinforcing ring 5 and the copper pipe 2, so that transformer oil leakage is prevented, and a sealing surface is lengthened;

opening two sides of the copper pipe 2 according to the thickness of the external connecting terminal 1 and the internal connecting terminal 4, wherein the opening depth is determined according to the selected current, so that the welding area is ensured, and overheating caused by poor welding is avoided;

thirdly, placing the external wiring terminal 1 in the opening corresponding to the copper pipe 2 for welding, and requiring full welding to prevent transformer oil from leaking;

placing the inner connecting terminal 4 in the corresponding opening of the copper pipe 2 for welding, only welding the pipe wall, and reserving an oil circulation channel, namely an oil circulation inlet and outlet 7 in the figure 3, wherein the welding is required to be firm;

and step five, performing pressure injection on the welded copper pipe 2 to form an epoxy resin insulating layer 3.

Fig. 2 shows the local picture of transformer oil circulation formula heavy current hollow contact tube and transformer tank assembly, and the arrow direction in the picture indicates transformer oil flow direction, the utility model discloses transformer oil circulation formula heavy current hollow contact tube and 6 assembly drawing of transformer tank wall.

Oil circulating type large-current hollow conductive tube for transformer, can select different diameters according to the electric current, copper pipe 2 of different thickness, because the conductive tube has certain relation through electric current size and service environment temperature, because transformer oil can circulate the heat dissipation in the oil tank inside, if the conductive tube is hollow structure, dispel the heat with transformer oil through oil circulation inside the hollow conductive tube, also can effectively reduce the temperature of conductive tube, solve the problem that present transformer large-current conductive tube generates heat, simultaneously because the conductive tube is the great reduction of hollow structure weight, practice thrift a large amount of manufacturing cost.

At reinforcing ring 5 of copper pipe 2 outside welding, when copper pipe 2 carried out epoxy pressure and annotates, epoxy wrapped up reinforcing ring 5, but greatly increased epoxy and copper pipe 2's contact cross sectional area can effectively reduce because of the too short oil leak problem that leads to of pouring route, has also strengthened the problem of ftractureing when because of external force crimping in addition at the inside reinforcing ring 5 that increases of epoxy insulating layer 3.

Claims (3)

1. Oil circulating type large-current hollow conductive tube for transformer, which is characterized by comprising: the copper tube comprises an external connection terminal (1), a copper tube (2), an epoxy resin insulation layer (3), an internal connection terminal (4) and a reinforcing ring (5), wherein the reinforcing ring (5) is sleeved outside the copper tube (2) and welded on the copper tube (2), and epoxy resin is injected on the outer wall of the copper tube (2) welded with the reinforcing ring (5) to form the epoxy resin insulation layer (3); the external connecting terminal (1) and the internal connecting terminal (4) are respectively welded at two ends of the copper pipe (2).

2. The oil circulation type high-current hollow conducting tube for the transformer as claimed in claim 1, wherein: the number of the reinforcing rings (5) is at least one.

3. The oil circulation type high-current hollow conducting tube for the transformer as claimed in claim 1, wherein: openings for accommodating the external connecting terminal (1) and the internal connecting terminal (4) are reserved on the outer surfaces of two ends of the copper pipe (2), the width of each opening is consistent with the thickness of the external connecting terminal (1) and the thickness of the internal connecting terminal (4), and the external connecting terminal (1) and the internal connecting terminal (4) are arranged in the two openings and welded on the copper pipe (2) respectively.

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