CN204332662U - A new type of shell for casting current transformer - Google Patents

Abstract

A new hull for pouring current transformer, comprises the procapsid and back casing that snap together, is wherein provided with the core cylinder for location current mutual inductor coil in procapsid, and the outside of core barrel body is provided with location fin; Back casing is provided with core bore, and core bore is provided with detent, and location fin matches with detent and back casing is positioned on procapsid.Adopt front and rear housings of the present utility model, the method of tradition cast is instead of when making instrument transformer, get rid of casting mold and heated oven, can production environment be improved, reduce labour intensity, enhance productivity, and be convenient to realize automated production, and the production cost of product does not significantly improve, also product appearance quality have also been obtained raising simultaneously, has very large social benefit.

Description

A new type of shell for casting current transformer

technical field

The utility model belongs to the technical field of current transformers, in particular to a new casing of a casting type current transformer.

Background technique

At present, metal molds are used for the production of castable current transformers, the coils are fixed in the mold cavity, and the coils are positioned, then potted with unsaturated resin mixture, put into a high-temperature oven for rapid curing, and form products after demoulding , Some products will have defects such as cracking, whitening, burrs, and eccentricity. In mass production, a large number of casting molds will be required, and the long-term operation of the high-temperature oven will consume a lot of power and shorten the service life of the mold. When curing at high temperature, a large amount of harmful volatiles in the unsaturated resin mixture will overflow into the air, causing pollution to the environment. Operators working in a high temperature environment for a long time are not conducive to their physical and mental health. A small amount of gas in the unsaturated resin mixture will form pores on the surface of the cast body after curing, affecting the appearance quality of the product and the reliability of the insulation. In the process of mold loading and demoulding, the pouring mold needs to be frequently moved and heavy. When mixing the unsaturated resin and the curing agent, it needs to be stirred for a long time, so the operator consumes a lot of energy and the production efficiency is low.

Contents of the invention

The utility model mainly solves the technical problems existing in the above-mentioned prior art, and provides a new casing of a casting type current transformer.

The above-mentioned technical problems of the utility model are mainly solved by the following technical solutions: a new casing of a casting type current transformer, including a front casing and a rear casing which are fastened together, and the front casing is equipped There is a core barrel for positioning the coil of the current transformer, and the outer side of the core barrel wall is provided with positioning ribs; the rear shell is provided with a core hole, and the core hole is provided with a positioning groove, and the positioning rib and the positioning groove Cooperate so that the rear housing is positioned on the front housing.

Preferably, the rear shell is further provided with a number of pillars inserted into the cavity of the front shell.

The front and rear shells of the utility model adopt a male-female groove fastening structure, which is closely matched and compact, and has the same appearance, and is not affected by the environment and pouring. When in use, first fix the transformer coil in the front casing, then inject resin into the cavity of the front casing, and then fasten the rear casing, the post on the rear casing is inserted into the resin, and after a short time When the internal unsaturated resin is cured at room temperature, the front and rear shells and transformer coils are bonded together to form a whole. The pouring mold is removed in the whole process, and the resin does not need to be heated in an oven, which reduces energy consumption; the produced product has a uniform shape, requires low skills for employees, saves labor, and more than doubles the work efficiency.

Adopting the front and rear shells of the utility model replaces the traditional casting method when making transformers, and removes the casting mold and heating oven, which can improve the production environment, reduce labor intensity, improve production efficiency, and facilitate automatic production, and the product The production cost has not been significantly improved, and the appearance quality of the product has also been improved, which has great social benefits.

Description of drawings

Fig. 1 is a kind of three-dimensional structure schematic diagram of the utility model;

Fig. 2 is a schematic diagram of a split structure of the utility model.

In the figure, 1-front shell, 2-core barrel, 3-positioning rib, 4-rear shell, 5-core hole, 6-positioning groove, 7-shaped post.

Detailed ways

The technical solutions of the present utility model will be further specifically described below through the embodiments and in conjunction with the accompanying drawings.

Embodiment: Referring to Fig. 1 and Fig. 2, the utility model comprises a front shell and a rear shell snapped together, wherein a core barrel for positioning the current transformer coil is arranged inside the front shell, and the outer side of the core barrel wall is provided with There are positioning ribs; the rear shell is provided with a core hole, and the core hole is provided with a positioning groove, and the positioning rib and the positioning groove cooperate to make the rear shell be positioned on the front shell. As a further improvement, the rear housing is further provided with several mold columns inserted into the cavity of the front housing.

The front and rear shells of the utility model adopt a male-female groove fastening structure, which is closely matched and compact, and has the same appearance, and is not affected by the environment and pouring. When in use, first fix the transformer coil in the front casing, then inject resin into the cavity of the front casing, and then fasten the rear casing, the post on the rear casing is inserted into the resin, and the short time When the internal unsaturated resin is cured at room temperature, the front and rear shells and transformer coils are bonded together to form a whole. The pouring mold is removed during the whole process, and the resin does not need to be heated in an oven, which reduces energy consumption; the produced product has a uniform shape, requires less skill for employees, saves labor, and more than doubles the work efficiency.

Adopting the front and rear shells of the utility model replaces the traditional casting method when making transformers, and removes the casting mold and heating oven, which can improve the production environment, reduce labor intensity, improve production efficiency, and facilitate automatic production, and the product The production cost has not been significantly improved, and the appearance quality of the product has also been improved, which has great social benefits.

Finally, it should be pointed out that the above embodiments are only representative examples of the present utility model. Apparently, the utility model is not limited to the above-mentioned embodiments, and many variations are possible. Any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention shall be deemed to belong to the protection scope of the present invention.

Claims (1)

1. a new hull for pouring current transformer, comprises the procapsid and back casing that snap together, and it is characterized in that being provided with the core cylinder for location current mutual inductor coil in described procapsid, the outside of core barrel body is provided with location fin; Described back casing is provided with core bore, and core bore is provided with detent, and location fin matches with detent and makes back casing be positioned on procapsid, described back casing is also provided with some type posts be plugged in procapsid die cavity.