CN201975237U - Oil-tight dry-type sleeve for transformer - Google Patents

Abstract

The utility model discloses an oil-tight dry-type sleeve for a transformer, which comprises a conducting rod and an insulator sleeved on the conducting rod, and knurling is formed on the outer surface of the conducting rod. The oil-tight dry-type sleeve for the transformer has the advantages that the knurling structure is adopted on the outer surface of the conducting rod, so that the surface roughness of the conducting rod is improved and the combination between the conducting rod and the insulator is enhanced; meanwhile, a groove is formed on and a sealing element is mounted on the conducting rod to prevent transformer oil from leaking along the conducting rod, so that the dry-type sleeve has a simple structure, as well as favorable mechanical strength and leak tightness.

Description

A kind of seepage-proof oil dry sleeve of transformer

Technical field

The utility model relates to a kind of dry sleeve of transformer, particularly a kind of dry sleeve of transformer that prevents the transformer oil seepage.

Background technology

Traditional transformer porcelain sleeve pipe is broken easily, and relevant supporting seal with it is easy to weathering, aging, and the seal point that requires when the porcelain sleeve pipe uses simultaneously is many, transformer oil leakage problems in the ubiquity use;

Existing dry sleeve, its structure and material is not quite similar, SMC molding or DMC molding are arranged, they need specific pressure forming machine and mould just can produce, and practice shows the dry sleeve of these compression moldings, different because of the inserts copper conductor with hot shortness between SMC or the DMC, the phenomenon of transformer oil seepage still appears.

The utility model content

The utility model purpose: at the problems referred to above, the purpose of this utility model provides the seepage-proof oil dry sleeve of transformer of a kind of mechanical strength and good airproof performance.

Technical scheme: a kind of seepage-proof oil dry sleeve of transformer, comprise conducting rod and insulator, described insulator is enclosed within on the described conducting rod, and the outer surface of described conducting rod has annular knurl.

Offer groove on the described conducting rod, prevent that transformer oil from certain pressure effect lower edge conducting rod seepage, offering the certain temporarily providing room of transformer oil.

The outside end face of described insulator and the joint of described conducting rod are equipped with seal, prevent that the transformer oil band pressure that causing because of hot shortness's difference between conducting rod and the insulator in use appears in dry sleeve from spilling.

Described insulator is a beveled structure, makes dry sleeve have enough intensity.

Beneficial effect: compared with prior art, the utility model has the advantages that the annular knurl structure of conducting rod outer surface, the surface roughness of conducting rod is improved, itself and the combining of insulator have been strengthened, simultaneously conducting rod is offered groove, seal is installed, prevent transformer oil along the conducting rod seepage, dry sleeve is simple in structure, has excellent mechanical intensity and sealing.

Description of drawings

Fig. 1 is a kind of cutaway view of seepage-proof oil dry sleeve of transformer structure;

Fig. 2 is the structural representation of conducting rod among Fig. 1.

Embodiment

Below in conjunction with the drawings and specific embodiments, further illustrate the utility model, should understand these embodiment only be used to the utility model is described and be not used in the restriction scope of the present utility model, after having read the utility model, those skilled in the art all fall within the application's claims institute restricted portion to the modification of the various equivalent form of values of the present utility model.

Shown in accompanying drawing 1,2, a kind of seepage-proof oil dry sleeve of transformer comprises conducting rod 1 and insulator 2, and described insulator 2 is enclosed within on the described conducting rod 1, and the outer surface of described conducting rod 1 has annular knurl 3.

Offer a plurality of annular recess 4 on the conducting rod 1, annular knurl 3 the hard-pressed bale part that the position is positioned at conducting rod 1 outer surface and insulator 2 is set.Conducting rod 1 is inserted in insulator 2, installs seal 5 at the joint of the outside of insulator 2 end face and conducting rod 1, promptly obtains a kind of seepage-proof oil dry sleeve of transformer described in the utility model.

Insulator 2 carries out pressure casting for die casting forms by reinforcement material and resin, and presses curing process and handle.Insulator 2 is a beveled structure height alternative form, under the requirement of satisfying creepage distance, has enough intensity and good surface appearance.

Claims (4)

1. a seepage-proof oil dry sleeve of transformer comprises conducting rod (1) and insulator (2), and described insulator (2) is enclosed within on the described conducting rod (1), it is characterized in that: the outer surface of described conducting rod (1) has annular knurl (3).

2. a kind of seepage-proof oil dry sleeve of transformer according to claim 1 is characterized in that: offer groove (4) on the described conducting rod (1).

3. a kind of seepage-proof oil dry sleeve of transformer according to claim 1 is characterized in that: the joint of the outside end face of described insulator (2) and described conducting rod (1) is equipped with seal (5).

4. a kind of seepage-proof oil dry sleeve of transformer according to claim 1 is characterized in that: described insulator (2) is a beveled structure.

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