CN209912708U

CN209912708U - Novel current transformer

Info

Publication number: CN209912708U
Application number: CN201921157397.XU
Authority: CN
Inventors: 刘琪
Original assignee: Yueqing City Summer Sen Electric Technology Co Ltd
Current assignee: Yueqing City Summer Sen Electric Technology Co Ltd
Priority date: 2019-07-22
Filing date: 2019-07-22
Publication date: 2020-01-07
Anticipated expiration: 2029-07-22

Abstract

The utility model discloses a novel current transformer, its technical scheme main points include two fixed connection's of lower extreme casing and be located the casing on semicircle annular iron core and the iron core around having the winding, the rotation connection is done to the casing one end of lower extreme interconnect, the iron core is for the exit end protrusion setting of casing, the bottom is equipped with the fixed slot in the casing of upper and lower extreme, fixed connection has the cushion in the fixed slot, the inside and outside both sides of iron core are equipped with spacing cushion, the spacing cushion of both sides is laminated in shells inner wall, the cushion and the mutual butt of spacing cushion that is located the iron core outside, be equipped with the wire hole on the casing, the line of winding passes the wire hole and draws forth, be equipped with the sealing washer on the wire hole. The utility model discloses it is intact to have the core section to coincide, effect that measurement accuracy is high.

Description

Novel current transformer

Technical Field

The utility model relates to a mutual technical field of electric current, more specifically say that it relates to a novel current transformer.

Background

The transformer is also called as instrument transformer, which is a general name of current transformer and voltage transformer, can change high voltage into low voltage, and large current into small current, and is used for measuring or protecting system, its function is mainly to convert high voltage or large current into standard low voltage (100V) or standard small current (5A or 1A, both referring to rated value) in proportion, so as to realize standardization and miniaturization of measuring instrument, protecting equipment and automatic control equipment, and the transformer can also be used to separate high voltage system, so as to ensure the safety of human body and equipment. The current transformer has a simple structure, consists of a primary winding, a secondary winding, an iron core, a framework, a shell, a connecting terminal and the like which are insulated from each other, has the working principle basically the same as that of a transformer, works according to the electromagnetic induction principle, converts voltage into the transformer and converts current into the current, and a winding N1 is connected with the measured current and is called as a primary winding (or a primary winding and a primary winding); the winding N2 is connected with a measuring instrument called a secondary winding (or a secondary winding and a secondary winding), the number of turns N1 of the primary winding is less, the primary winding is directly connected in series in a power supply circuit, and when primary load current passes through the primary winding, the generated alternating magnetic flux induces to generate secondary current which is reduced in proportion; the number of turns of the secondary winding is N2, the secondary winding is connected with secondary loads of current coils such as instruments, relays and transmitters in series to form a closed loop, the primary winding and the secondary winding have the same ampere turns, I1N 1 is I2N2, the rated current of the current transformer is smaller than the load impedance of the current transformer in actual operation, and the secondary winding is close to a short-circuit state and is equivalent to a transformer in short-circuit operation.

However, the connection between the two iron cores of the open-close type current transformer generally adopts a hoop to fix the product together. The hoop connecting mode can influence the product performance due to different screwing degrees and whether the interfaces are aligned or not; in addition, after the installation many times, can lead to the staple bolt screw to become invalid and can appear laminating inseparable, influence current transformer's measurement accuracy.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model provides a novel current transformer has the core section and coincide intact, effect that measurement accuracy is high.

In order to achieve the above purpose, the utility model provides a following technical scheme: the utility model provides a novel current transformer, includes two fixed connection's of upper and lower end casing and be located the semicircle annular iron core and the iron core on around having the winding, the iron core sets up for the exit end protrusion of casing, the bottom is equipped with the fixed slot in the casing, fixed connection has the cushion in the fixed slot, the inside and outside both sides of iron core are equipped with spacing cushion, the spacing cushion of both sides is laminated in shells inner wall, the cushion with be located the mutual butt of spacing cushion in the iron core outside.

By adopting the technical scheme, when the shells at the upper end and the lower end are connected together by using the hoop type method, the iron core protruding out of the outlet end of the shell is pressed into the shell, the limiting elastic pad positioned outside the iron core in the shell and the elastic pad at the bottom of the shell are pressed to generate elastic reaction to enable the iron core to extrude to the outlet end of the shell, the iron cores at the upper end and the lower end can be attached more closely to achieve the perfect coincidence of the core sections, the effect of high measurement precision is achieved, meanwhile, the elastic force of the limiting elastic pads positioned inside and outside the iron core can effectively fix the iron core at the central position, and the iron core can be prevented from rotating in the shell through the extruding pressure and the friction force of the iron core when the two ends are prevented from being.

The utility model discloses further set up to: and one end parts of the two shells at the upper end and the lower end are rotatably connected.

Through adopting above-mentioned technical scheme, the rotation of one end is connected and can be avoided aiming at the iron core section at every turn, and the core section coincide intact when can guarantee fixed connection behind the lock, further reaches the effect that measurement accuracy is high.

The utility model discloses further set up to: the elastic pad is made of silica gel.

Through adopting above-mentioned technical scheme, the silica gel material can give the elasticity that the cushion is suitable and possess the effect of environmental protection simultaneously.

The utility model discloses further set up to: the limiting elastic pad is made of silica gel.

Through adopting above-mentioned technical scheme, spacing cushion that silica gel was made can give spacing cushion elasticity in the time also certain frictional force is spacing to prevent to slide the iron core.

The utility model discloses further set up to: the winding is characterized in that a wire outlet hole is formed in the shell, a wire of the winding penetrates through the wire outlet hole to be led out, and a sealing ring is arranged on the wire outlet hole.

By adopting the technical scheme, the sealing ring is arranged at the position of the outlet hole, the sealing performance of the whole structure is ensured, the insulating performance and the moisture-proof performance are good, the output end of the winding is directly led out through the shell, the sealing performance of a product is ensured, the risk problem of secondary short circuit is solved, meanwhile, the installation and the use are very simple and convenient, and the electricity larceny prevention performance is ensured.

To sum up, the utility model discloses following beneficial effect has: spacing cushion that is located the iron core outside in the casing and the cushion pressurized of casing bottom produce elasticity reaction and make the iron core crowd to the exit end of casing, what the iron core of going up the lower extreme can laminate more closely reaches the core section and coincide intact, the effect that measurement accuracy is high, the elasticity that is located the spacing cushion of iron core inside and outside simultaneously can effectively fix the iron core in central point and put, and can possess certain frictional force when preventing both ends fixed connection when the atress is uneven and prevent that the iron core from taking place rotatoryly in the casing, further supplementary intact effect of coinciding that reaches the core section. The wire outlet is provided with a sealing ring, so that the sealing performance of the whole structure is ensured, the wire outlet has good insulating performance and moisture-proof performance, the output end of the winding is directly led out through the shell, the sealing performance of the product is ensured, the risk problem of secondary short circuit is solved, and meanwhile, the wire outlet is very simple and convenient to install and use, and the electricity larceny prevention performance of the wire outlet is ensured.

Drawings

FIG. 1 is a schematic sectional view of the planar structure of the present embodiment;

fig. 2 is a schematic perspective view of the present embodiment.

Reference numerals: 1. a housing; 11. fixing grooves; 2. an iron core; 3. a winding; 4. an elastic pad; 5. a limiting elastic pad; 6. a wire outlet hole; 61. and (5) sealing rings.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The embodiment discloses a novel current transformer, as shown in fig. 1, fig. 2, around winding 3 that has, the one end activity of the casing 1 of interconnect is articulated together about two upper and lower both ends through screw fixed connection's casing 1 and being located 1 inside semicircle annular iron core 2 of casing and iron core 2, iron core 2 is for the exit end protrusion setting of casing 1, the bottom is equipped with square fixed slot 11 in the casing 1 of going up the lower extreme, 11 internal fixation of fixed slot is stained with has connect the square cushion 4 that silica gel made, the inside and outside both sides of iron core 2 are equipped with the spacing cushion 5 of laminating in the silica gel of 2 both sides of iron core, 5 another facies laminating in 1 inner wall of casing of spacing cushion of both sides, the mutual butt of 5 of spacing cushion 4 and the spacing cushion that are located the 2 outsides of iron core. The winding structure is characterized in that a circular wire outlet hole 6 is formed in the shell 1, a wire of the winding 3 penetrates through the wire outlet hole 6 to be led out, and a sealing ring 61 matched with the wire outlet hole 6 is arranged on the wire outlet hole 6.

In the actual use process, the rotating shell 1 is buckled together, then the two ends are reinforced by screws, so that the sections of the iron cores 2 on the shell 1 can be aligned accurately and tightly attached, while the iron core 2 is fixed, the convexly arranged iron core 2 is pressed into the shell 1, so that the limiting elastic cushion 5 positioned at the outer side of the iron core 2 in the shell 1 and the elastic cushion 4 at the bottom of the shell 1 are pressed to generate elastic force to react on the iron core 2 to extrude the iron core 2 to the outlet end of the shell 1, the iron cores 2 at the upper end and the lower end can be jointed more closely to achieve the effects of perfect coincidence of core sections and high measurement precision, meanwhile, the elastic force of the limiting elastic pads 54 positioned at the inner side and the outer side of the iron core 2 can effectively fix the iron core 2 at the central position, and certain friction force can be provided to prevent the iron core 2 from rotating in the shell 1 when the two ends are not uniformly stressed during fixed connection, so that the effect of good fit of the core section is further achieved. The sealing ring 61 is arranged at the wire outlet hole 6, so that the sealing performance of the whole structure is guaranteed, the insulating performance and the moisture-proof performance are good, the output end of the winding 3 is directly led out through leading through the shell 1, the sealing performance of a product is guaranteed, the risk problem of secondary short circuit is solved, meanwhile, the installation and the use are very simple and convenient, and the electricity larceny prevention performance is guaranteed.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, any modification, equivalent replacement, or improvement made within the design concept of the present invention should be included within the protection scope of the present invention.

Claims

1. The utility model provides a novel current transformer, includes two fixed connection's of upper and lower end casing (1) and be located and wind winding (3) that have on half annular iron core (2) and the iron core (2) of casing (1), its characterized in that: iron core (2) set up for the exit end protrusion of casing (1), the bottom is equipped with fixed slot (11) in casing (1), fixed connection has cushion (4) in fixed slot (11), the inside and outside both sides of iron core (2) are equipped with spacing cushion (5), the spacing cushion (5) of both sides are laminated in casing (1) inner wall, cushion (4) and the mutual butt of spacing cushion (5) that is located the iron core (2) outside.

2. The novel current transformer of claim 1, wherein: one end parts of the two shells (1) at the upper end and the lower end are rotatably connected.

3. The novel current transformer of claim 1, wherein: the elastic pad (4) is made of silica gel.

4. The novel current transformer of claim 1, wherein: the limiting elastic pad (5) is made of silica gel.

5. The novel current transformer of claim 1, wherein: the winding is characterized in that a wire outlet hole (6) is formed in the shell (1), wires of the winding (3) penetrate through the wire outlet hole (6) to be led out, and a sealing ring (61) is arranged on the wire outlet hole (6).