CN212010703U

CN212010703U - Multifunctional current transformer convenient to install

Info

Publication number: CN212010703U
Application number: CN202020426414.1U
Authority: CN
Inventors: 金波; 石艳军
Original assignee: Hubei Tianrui Electronic Co ltd
Current assignee: Hubei Tianrui Electronic Co ltd
Priority date: 2020-03-30
Filing date: 2020-03-30
Publication date: 2020-11-24
Anticipated expiration: 2030-03-30

Abstract

The utility model provides a multi-functional current transformer convenient to installation, be in including casing and setting the inside iron core of casing, the casing includes casing and lower casing, the iron core includes iron core and lower iron core, just go up the iron core and be located respectively with lower iron core go up inside casing and the lower casing, it has the through wires hole with lower casing combination back center to go up the casing, be provided with temperature sensor on the through wires hole wall for detect the temperature of cable, down around being equipped with multiturn coil on the iron core, just the wiring end of coil exposes the casing surface. The utility model discloses a set up the fixed column in casing both sides under last to casing about cooperation screw rod and butterfly nut fasten, connect closely convenient operation.

Description

Multifunctional current transformer convenient to install

Technical Field

The utility model relates to a mutual-inductor field particularly, relates to a multi-functional current transformer convenient to installation.

Background

The current transformer is an instrument for converting a large primary side current into a small secondary side current according to the electromagnetic induction principle to measure, and is mainly used for current measurement in a circuit.

At present, current transformer comprises two semicircle rings mostly, and in the use, will two upper and lower parts combinations and lock through the hasp two semicircle rings through methods such as circle hoop, because circle hoop is the plastic tape material, intensity is low, easy fracture adopts hasp fastening mode moreover, may cause the fastening not in place, and then causes the magnetic circuit to have great gap, and the magnetic resistance obviously increases, constitutes the threat to electric power system's safety in production.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a multi-functional current transformer convenient to installation has solved the problem that two parts fasten not in place about the current transformer among the prior art.

In order to solve the technical problem, the utility model discloses a technical scheme is: the utility model provides a multi-functional current transformer convenient to installation, is in including casing and setting the inside iron core of casing, the casing includes casing and lower casing, the iron core includes iron core and lower iron core, just go up the iron core and be located respectively with lower iron core go up inside casing and the lower casing, it has the through wires hole with lower casing combination back center to go up the casing, be provided with temperature sensor on the through wires hole wall for detect the temperature of cable, around being equipped with many turns coil on the iron core down, just the wiring end of coil exposes the casing surface.

According to the preferable scheme, fixing columns are arranged on two sides of the upper shell and two sides of the lower shell, screw rods are arranged in the fixing columns, one ends of the screw rods are fixedly connected to the fixing columns of the lower shell, the other ends of the screw rods penetrate through the fixing columns of the upper shell, and butterfly nuts are in threaded connection with the end portions of the screw rods.

As a preferred scheme, at least three clamping grooves are uniformly distributed on the wall surface of the threading hole, and the clamping grooves are connected with rubber chucks used for clamping cables in a clamping mode.

Preferably, a junction box is arranged on the outer surface of the shell, and the terminals of the coil and/or the temperature sensor are positioned inside the junction box.

As a preferred scheme, the upper shell and the lower shell are both semicircular, and the upper end of the upper shell is provided with a groove, so that the cable can be wound conveniently.

Preferably, the shell is internally cast with epoxy resin.

Compared with the prior art, the beneficial effects of the utility model include:

(1) the upper shell and the lower shell are tightly connected and convenient to operate by arranging the fixing columns at two sides of the upper shell and the lower shell and matching the screw rod and the butterfly nut to fasten the upper shell and the lower shell;

(2) the temperature sensor is arranged in the threading hole, can be used for monitoring the temperature of the surface of the cable, and can give an alarm in time when the cable is heated due to overload and other reasons;

(3) the rubber chucks are distributed on the wall surface of the threading hole and are of a hollow structure, and when a cable passes through the threading hole, the rubber chucks clamp the cable, so that the structure is more stable;

(4) the outer surface of the shell is provided with a junction box, and the temperature sensor and the wiring end of the coil are positioned in the junction box, so that the wiring end can be protected from being damaged by the external environment.

Drawings

The disclosure of the present invention is explained with reference to the drawings. It is to be understood that the drawings are designed solely for the purposes of illustration and not as a definition of the limits of the invention. In the drawings, like reference numerals are used to refer to like parts. Wherein:

fig. 1 is a schematic structural diagram of a multifunctional current transformer according to an embodiment of the present invention;

fig. 2 is a partial sectional view of the multifunctional current transformer according to the embodiment of the present invention;

3 fig. 3 3 3 is 3 a 3 sectional 3 view 3 taken 3 along 3 line 3 a 3- 3 a 3 of 3 fig. 3 2 3. 3

Reference numbers in the figures: 1-upper shell, 2-lower shell, 3-threading hole, 4-upper iron core, 5-lower iron core, 6-coil, 7-temperature sensor, 8-rubber chuck, 9-clamping groove, 10-fixing column, 11-screw, 12-butterfly nut, 13-groove, 14-first junction box and 15-second junction box.

Detailed Description

It is easily understood that, according to the technical solution of the present invention, a plurality of alternative structural modes and implementation modes can be proposed by those skilled in the art without changing the spirit of the present invention. Therefore, the following detailed description and the accompanying drawings are merely illustrative of the technical solutions of the present invention, and should not be considered as limiting or restricting the technical solutions of the present invention in their entirety or in any other way.

An embodiment according to the present invention is shown in conjunction with fig. 1 to 3. The utility model provides a multi-functional current transformer convenient to installation, including casing and the iron core of setting in the casing inside, the casing includes casing 1 and casing 2 down, it is half-circular with casing 2 down to go up casing 1, it has through wires hole 3 with casing 2 combination back center down to go up casing 1, the cable passes again after directly passing or winding several rings from through wires hole 3, the iron core includes iron core 4 and lower iron core 5, and it is located casing 1 and casing 2 inside down respectively with iron core 5 to go up iron core 4, it has multiturn coil 6 to wind on the lower iron core 5, the number of turns that the cable was established is generally less than the number of turns of coil 6, the wiring end of coil 6 exposes the casing surface, concrete numerical value can be measured through the ampere meter again to the wiring end.

When a large current passes through the cable, the primary current on the side of the cable with a larger value is converted into the secondary current on the side of the coil 6 with a smaller value according to a certain transformation ratio through the electromagnetic induction principle, and the secondary current is used for protection or measurement. For example, a 400/5 ratio current transformer may convert an actual 400A current to a 5A current.

Epoxy resin is poured between the upper iron core 4 and the lower iron core 5 and the shell, and the upper iron core 4 and the lower iron core 5 are wrapped by the epoxy resin, so that the iron core has the functions of sealing, water proofing, moisture proofing and dust proofing.

In this embodiment, be provided with temperature sensor 7 on the threading hole 3 wall for detect the temperature of cable, temperature sensor 7 is connected with the controller and the alarm device of peripheral hardware, when the cable generates heat because of reasons such as transshipping, in time reports to the police. The temperature sensor 7 can be an IRTP type infrared temperature sensor produced by Hangzhou Shanghai electric company and an XMYD-74 type controller matched with the IRTP type infrared temperature sensor.

In this embodiment, all be provided with fixed column 10 in last casing 1 and lower casing 2 both sides, the inside screw rod 11 that is provided with of fixed column 10, screw rod 11 one end fixed connection is on the fixed column 10 of casing 2 down, and the other end runs through the fixed column 10 of casing 1, and its tip threaded connection has butterfly nut 12. During assembly, the screws 11 on the fixing columns 10 on the two sides of the lower shell 2 are aligned to the through holes on the fixing columns 10 on the two sides of the upper shell 1, so that the screws 11 penetrate through the through holes, and the butterfly nuts 12 are screwed tightly, so that the upper shell and the lower shell of the current transformer can be tightly connected, and the operation is convenient.

Further, 3 wall evenly distributed have at least three draw-in groove 9 at the through wires hole, preferably three draw-in groove 9, and the block is connected with the rubber chuck 8 that is used for the centre gripping cable on the draw-in groove 9, adopts the block connected mode, can be when rubber chuck 8 takes place to age, conveniently dismantles the replacement. The rubber chuck 8 is of a hollow structure, when a cable passes through the threading hole, the rubber chuck 8 contracts and deforms inwards, and the cable is clamped tightly, so that the overall structure is more stable.

Furthermore, a junction box is arranged on the outer surface of the shell, and the junction box is provided with a cover for closing, so that the terminal can be protected from the external environment. Specifically, a first junction box 14 and a second junction box 15 are respectively arranged on the front side and the rear side of the lower shell 2, the terminal of the temperature sensor 7 is positioned in the first junction box 14, the terminal of the coil 6 is positioned in the second junction box 15, or the terminals of the temperature sensor 7 and the coil 6 are arranged in one junction box.

The upper end of the upper shell 1 is provided with the groove 13, so that the cable can be wound conveniently, and the cable can be prevented from being subjected to position deviation after being wound.

The technical scope of the present invention is not limited to the content in the above description, and those skilled in the art can make various modifications and alterations to the above embodiments without departing from the technical spirit of the present invention, and these modifications and alterations should fall within the protection scope of the present invention.

Claims

1. The utility model provides a multi-functional current transformer convenient to installation, is in including casing and setting the inside iron core of casing, a serial communication port, the casing includes casing and lower casing, the iron core includes iron core and lower iron core, just go up the iron core and be located respectively with lower iron core go up inside casing and the lower casing, it has the through wires hole with lower casing combination back center to go up the casing, be provided with temperature sensor on the through wires hole wall for detect the temperature of cable, around being equipped with many turns of coil on the iron core down, just the wiring end of coil exposes the casing surface.

2. The multifunctional current transformer convenient to mount as claimed in claim 1, wherein fixing posts are disposed on both sides of the upper and lower shells, a screw is disposed inside the fixing posts, one end of the screw is fixedly connected to the fixing post of the lower shell, the other end of the screw penetrates through the fixing post of the upper shell, and a butterfly nut is connected to the end of the screw in a threaded manner.

3. The multifunctional current transformer convenient to mount as claimed in claim 1, wherein at least three clamping grooves are uniformly distributed on the wall surface of the threading hole, and a rubber chuck for clamping a cable is connected to the clamping grooves in a clamping manner.

4. The multifunctional current transformer convenient for installation according to claim 1, wherein the outer surface of the housing is provided with a junction box, and the terminals of the coil and/or the temperature sensor are located inside the junction box.

5. The multifunctional current transformer convenient to install as claimed in claim 1, wherein the upper casing and the lower casing are both semi-circular, and the upper end of the upper casing is provided with a groove for facilitating the winding of cables.

6. The multi-functional current transformer of claim 1, wherein said housing is internally potted with epoxy.