CN114360852B

CN114360852B - Quick plug open-close type current transformer

Info

Publication number: CN114360852B
Application number: CN202111640006.1A
Authority: CN
Inventors: 毛卫兴
Original assignee: Jiangsu Eryi Electric Co ltd
Current assignee: Jiangsu Eryi Electric Co ltd
Priority date: 2021-12-30
Filing date: 2021-12-30
Publication date: 2022-12-13
Anticipated expiration: 2041-12-30
Also published as: CN114360852A

Abstract

The invention discloses a quick plug-pull open-close type current transformer which comprises two shells and a fixed plate, wherein an iron core is embedded in each of the two shells, the two shells are respectively connected to the fixed plate in a sliding manner, one sides of the two shells, which are close to each other, are respectively provided with a positioning plate, the positioning plates are made of permanent magnetic materials, the different poles of the two positioning plates are opposite, the upper end surface of the fixed plate is provided with an I-shaped slide rail, the two shells are respectively connected to the slide rail in a sliding manner, two sides of the slide rail are respectively and symmetrically provided with four reset springs, and the four reset springs are respectively arranged at the corners of the I-shaped structure of the slide rail. Has the advantages that: the installation is convenient to detach, the self-detection to the circuit can be carried out, the circuit can be automatically recovered after the circuit is broken, the normal work is prevented from being influenced, the two iron cores can be automatically retracted and cannot be connected when the short-circuit current with a large peak value occurs, and therefore the safety of external working personnel in a crisis is avoided.

Description

Quick plug open-close type current transformer

Technical Field

The invention relates to the technical field of current transformers, in particular to a quick plug-pull open-close type current transformer.

Background

The open-close type current transformers used in the prior art are of two types, one type is bundled by a stainless steel band, the stainless steel band is provided with six oblong holes, two ends of the stainless steel band are provided with shaft pins, and the stainless steel band is provided with a through hole and a screw hole which are matched with bolts and are pulled tightly or disassembled during installation and maintenance; in the other type, clamping grooves are additionally arranged at two ends of the opening and closing part, screws penetrate through the middle of the opening and closing part, and the two parts of mutual inductors are reliably meshed through the connection of the bolts. The two installation modes have the problems that the steel belt and the mutual inductor need to be separated during disassembly and installation or bolts are disassembled.

Through retrieval, the chinese granted patent No. CN105405627B discloses a quick plug-pull open-close type current transformer, which includes two upper and lower half frame-shaped transformer plastic housings, the front and rear parts of the left and right frames of the lower transformer plastic housing are respectively integrally provided with a pressing sheet, the inner side of the pressing sheet is provided with a fastening pin, and the left and right positions of the corresponding upper transformer plastic housing are provided with a fixed pin hole.

Disclosure of Invention

The invention aims to solve the problems in the prior art and provides a quick plug-pull open-close type current transformer.

The utility model provides a quick plug open-close type current transformer, includes two casings and fixed plate, two an iron core has been set up respectively in the casing, two sliding connection is on the fixed plate respectively to the casing, two one side that the casing is close to each other is provided with a locating plate respectively, the locating plate adopts permanent magnetism material and the magnetic pole heteropolar of two locating plates is relative, the up end of fixed plate is provided with the slide rail of I shape structure, two sliding connection is on the slide rail respectively to the casing, the both sides symmetry respectively of slide rail is provided with four reset spring, four reset spring sets up the corner at the I shape structure of slide rail respectively.

In foretell quick plug open-close type current transformer, two one side that the locating plate is close to each other is provided with a protection bag respectively, two the protection bag adopts the double-deck bag structure of interior outer bag respectively, it has buffer liquid and inert gas to fill in the interior bag that the protection bag set up, buffer liquid adopts the lower evaporating liquid of boiling point, it has the air to fill in the outer bag that the protection bag set up, every the outer bag of protection bag all communicates and is provided with a pressurization mouth and check valve, two the pressurization mouth is just setting up and common and external manual inflator feeds through the setting, the lateral wall intercommunication of protection bag is provided with an air jet, the sealed air jet department that is provided with of air jet.

In foretell a quick plug open-close type current transformer, every a spout, every all set up in the casing a spout, every the equal sliding connection of iron core is in the spout, a cavity has been seted up in the casing, sliding connection has a slide in the cavity, the slide is close to one side fixedly connected with connecting rod of spout, the connecting rod runs through the cavity and one end and iron core fixed connection outside the cavity, a plurality of compression spring of one side fixedly connected with of connecting rod are kept away from to the slide, and every compression spring's stiff end all is fixed with the interior wall connection of cavity.

In foretell quick plug open-close type current transformer, the cavity is located the slide and keeps away from one side top of connecting rod and has seted up inlet channel, inlet channel and the junction sealing connection of cavity have an electromagnetism check valve, inlet channel's the other end and the outer bag body intercommunication of protection bag, two the end of giving vent to anger of jet-propelled pipe is each other just to setting up.

In the above-mentioned quick plug open-close type current transformer, the inboard ring of interior utricule is provided with a plurality of gas outlets, and is a plurality of the gas outlet sets up with the axis ring array of protection bag, and is a plurality of the gas outlet communicates jointly and is provided with the automatically controlled valve, the inside wall of interior utricule is provided with the temperature-controlled piece, temperature-controlled piece and automatically controlled valve all communicate with the controller and control.

In the above-mentioned quick plug open-close type current transformer, two one sides that the casing keeps away from each other are fixed respectively and are provided with a handle, the bottom of fixed plate is provided with a plurality of sucking discs, and is a plurality of the square array of sucking disc sets up the bottom at the fixed plate.

Compared with the prior art, the invention has the advantages that:

1: the effect of magnetic fixing is realized by the two positioning plates, and the two positioning plates cannot be attached by the two protective bags, so that the magnetic force for separating and disassembling the two positioning plates is reduced, and the installation and the disassembly are convenient;

2: the buffer liquid and the air are respectively arranged in the inner bag body and the outer bag body of the protection bag, so that the effects of insulation protection and overcurrent self-breaking can be realized, the circuit can be automatically detected, and when only the current fluctuates, the circuit can be automatically restored after the circuit is broken, thereby avoiding influencing the normal work;

3: and when the short-circuit current of great peak value appears at current transformer, through switching on electromagnetism check valve, with outer internal capsule gas input to the cavity in for the slide drives the iron core shrink, and when two casings fold once more like this, two iron cores will unable intercommunication, thereby protection current transformer avoids endangering external staff's safety.

Drawings

Fig. 1 is a schematic structural diagram of a quick plug-pull open-close type current transformer provided by the invention;

fig. 2 is a cross-sectional view of an inner cavity of a quick plug-in open-close type current transformer according to the present invention;

fig. 3 is a cross-sectional view of a protective bag in a quick plug-in open-close type current transformer according to the present invention;

fig. 4 is an external view of a protective capsule in a quick plug-in open-close type current transformer provided by the invention.

In the figure: 1 machine shell, 2 fixing plate, 3 iron core, 4 locating plate, 5 sliding rail, 6 return spring, 7 protection bag, 71 inner bag body, 72 outer bag body, 8 pressurizing port, 9 air injection pipe, 10 sliding groove, 11 cavity, 12 sliding plate, 13 connecting rod, 14 compression spring, 15 air inlet channel, 16 electromagnetic one-way valve, 17 air outlet, 18 handle, 19 sucker.

Detailed Description

Referring to fig. 1-4, a quick plug open-close type current transformer comprises two housings 1 and a fixed plate 2, an iron core 3 is respectively embedded in each of the two housings 1, the two housings 1 are respectively connected to the fixed plate 2 in a sliding manner, one side, close to each other, of each of the two housings 1 is respectively provided with a positioning plate 4, the positioning plates 4 are made of permanent magnetic materials, the opposite poles of the magnetic poles of the two positioning plates 4 are opposite, the upper end face of the fixed plate 2 is provided with a sliding rail 5 in an i-shaped structure, the two housings 1 are respectively connected to the sliding rail 5 in a sliding manner, two sides of the sliding rail 5 are respectively and symmetrically provided with four reset springs 6, and the four reset springs 6 are respectively arranged at corners of the i-shaped structure of the sliding rail 5.

One side of two locating plates 4 close to each other is provided with a protective bag 7, two protective bags 7 adopt the double-layer bag structure of inner and outer bags respectively, the inner bag body 71 arranged by the protective bag 7 is filled with buffer liquid and inert gas, the buffer liquid adopts evaporation liquid with lower boiling point, so that gasification can occur at high temperature, the inner bag body 71 is expanded and extrudes the outer bag body 72, the outer bag body 72 arranged by the protective bag 7 is filled with air, the outer bag body 72 makes self expansion by injecting air, thereby realizing the protection of the joint of two iron cores 3 and realizing the insulation effect, the outer bag body 72 of each protective bag 7 is communicated and provided with a pressurizing port 8 and a one-way valve, two pressurizing ports 8 are arranged right opposite and communicated with an external manual inflating device together, through the manual inflating device, the outer bag body 72 of the protective bag 7 can be expanded, so that the two protective bags 7 are mutually attached, the iron cores 3 are sealed together, the outer side wall of the protective bag 7 is communicated and provided with an air jet pipe 9, the air jet pipe 9 is sealed and arranged at the air jet pipe 9, and the air jet pipe 9 can be moved to meet the requirement of the two air jet pipe telescopic devices under the condition that the air jet pipe can be conveniently unloaded, and the air jet pipe can be moved, and the air jet pipe can be conveniently.

Each machine shell 1 is provided with a sliding chute 10, each iron core 3 is connected in the sliding chute 10 in a sliding manner, a cavity 11 is arranged in the machine shell 10, a sliding plate 12 is connected in the cavity 11 in a sliding manner, one side of the sliding plate 12 close to the sliding chute 10 is fixedly connected with a connecting rod 13, the connecting rod 13 penetrates through the cavity 11 and is fixedly connected with the iron core 3 at one end outside the cavity 11, the iron core 3 can be controlled to contract and release through the connecting rod 13, when the two machine shells 1 are in a release state, the two iron cores can be in a communication state due to mutual fitting, when the two machine shells are in the contraction state, the two iron cores can not be connected and are in a state of circuit breaking protection, one side fixedly connected with a plurality of compression spring 14 of connecting rod 13 are kept away from to slide 12, every compression spring 14's stiff end all is fixed with the interior wall connection of cavity 11, cavity 11 is located one side top that slide 12 kept away from connecting rod 13 and has seted up inlet channel 15, inlet channel 15 and cavity 11's junction sealing connection have electromagnetism check valve 16, inlet channel 15's the other end and the outer bag body 72 intercommunication of protection bag 7, through pressurizeing in cavity 11 like this, make the slide 12 pressurized of both sides, compression spring 14 contracts, two iron cores 3 will be retrieved simultaneously like this, the gas outlet end of two gas nozzles 9 is just to setting up each other.

The inboard annular of interior utricule 71 is provided with a plurality of gas outlets 17, a plurality of gas outlets 17 set up with the axis annular array of protection bag 7, a plurality of gas outlets 17 communicate jointly and are provided with electric control valve, the inside wall of interior utricule 71 is provided with the temperature-controlled piece, under extreme high temperature's the condition, the temperature-controlled piece control electric control valve is opened, make the release of inert gas in interior utricule 71, thereby play the protection circuit component, avoid the effect of burning, under this state, two protection bags 7 are in the laminating state all the time, avoid external oxygen to get into like this, arouse the component burning, temperature-controlled piece and electric control valve all communicate with the controller and control, one side that two casing 1 kept away from each other is fixed respectively and is provided with a handle 18, the bottom of fixed plate 2 is provided with a plurality of sucking discs 19, the square array of a plurality of sucking discs sets up in the bottom of fixed plate 2, can conveniently swiftly fix in the external world through a plurality of sucking discs 19, need not fasten through the bolt, convenient operation.

When the current in the circuit fluctuates, the air in the two outer bag bodies 72 subjected to the action of over inflation is heated to expand, the gasification amount of the buffer liquid in the inner bag body 71 is increased, so that the outer bag body 72 is extruded, the outer bag body 72 is deeply expanded, the magnetic attraction between the two positioning plates 4 is extruded under the action of the air pressure, the two machine shells 1 are separated from each other, the effect of automatically disconnecting the circuit is realized, after the circuit is separated from the connection, the temperature of the gas and the buffer liquid in the protective bag 7 is reduced, the self expansion amount is reduced, the relative movement is realized again under the magnetic attraction between the two positioning plates 4, the initial working state is recovered, and in the state, if the circuit is recovered to be normal, the protective bag 7 cannot expand, so that the current transformer can continue to work normally;

when overcurrent occurs or the external environment temperature is too high, the temperature control chip positioned on the inner side of the inner capsule body 71 detects that the environment temperature exceeds the normal working temperature too much, at the moment, the plurality of air outlets 17 release protective gas at the same time, and the electromagnetic one-way valve 16 is opened at the same time, so that on one hand, inert gas is input into the inner side of the protective capsule 7, oxygen consumption and combustion at high temperature of elements are avoided, on the other hand, air in the outer capsule body 72 is injected into the cavity 11, the iron core 3 is recycled into the chute 10 through the connecting rod 13, and the device is always in a circuit breaking state, so that the safety of external workers is prevented from being endangered by large peak current.

Claims

1. A quick plug open-close type current transformer comprises two shells (1) and a fixed plate (2), and is characterized in that an iron core (3) is embedded in each of the two shells (1), the two shells (1) are respectively connected to the fixed plate (2) in a sliding manner, one sides, close to each other, of the two shells (1) are respectively provided with a positioning plate (4), the positioning plates (4) are made of permanent magnetic materials, the opposite poles of the magnetic poles of the two positioning plates (4) are opposite, the upper end face of the fixed plate (2) is provided with a sliding rail (5) with an I-shaped structure, the two shells (1) are respectively connected to the sliding rail (5) in a sliding manner, two sides of the sliding rail (5) are respectively and symmetrically provided with four reset springs (6), and the four reset springs (6) are respectively arranged at corners of the I-shaped structure of the sliding rail (5);

two one side that locating plate (4) are close to each other is provided with a protection bag (7), two protection bag (7) adopts the double-deck bag structure of interior outer bag respectively, it has buffer liquid and inert gas to fill in interior utricule (71) that protection bag (7) set up, buffer liquid adopts the evaporating liquid, it has the air to fill in the outer utricule (72) that protection bag (7) set up, every outer utricule (72) of protection bag (7) all communicate and are provided with a pressurization mouth (8) and check valve, two pressurization mouth (8) are just setting up and common and external manual aerating device intercommunication, the lateral wall intercommunication of protection bag (7) is provided with one jet-propelled pipe (9), the jet-propelled mouth department seal of pipe (9) is provided with the sealing plug.

2. The quick plug open-close type current transformer according to claim 1, wherein a sliding groove (10) is formed in each casing (1), each iron core (3) is slidably connected in the sliding groove (10), a cavity (11) is formed in the casing (1), a sliding plate (12) is slidably connected in the cavity (11), a connecting rod (13) is fixedly connected to one side of the sliding plate (12) close to the sliding groove (10), the connecting rod (13) penetrates through the cavity (11) and is fixedly connected with the iron core (3) at one end outside the cavity (11), a plurality of compression springs (14) are fixedly connected to one side of the sliding plate (12) far away from the connecting rod (13), and the fixed end of each compression spring (14) is fixedly connected with the inner wall of the cavity (11).

3. The quick plug open-close type current transformer according to claim 2, characterized in that an air inlet channel (15) is formed in the top of the cavity (11) on the side, away from the connecting rod (13), of the sliding plate (12), an electromagnetic one-way valve (16) is connected to the joint of the air inlet channel (15) and the cavity (11) in a sealing mode, the other end of the air inlet channel (15) is communicated with an outer bag body (72) of the protective bag (7), and the air outlet ends of the two air injection pipes (9) are arranged in a mutually opposite mode.

4. The quick plug open-close type current transformer according to claim 3, wherein a plurality of air outlets (17) are annularly arranged on the inner side of the inner bag body (71), the air outlets (17) are annularly arranged in a central axis annular array of the protection bag (7), the air outlets (17) are commonly communicated and provided with an electric control valve, a temperature control sheet is arranged on the inner side wall of the inner bag body (71), and the temperature control sheet and the electric control valve are both communicated and controlled by a controller.

5. The quick plug open-close type current transformer according to claim 4, wherein a handle (18) is fixedly arranged on each of two sides of the casing (1) away from each other, a plurality of suckers (19) are arranged at the bottom of the fixing plate (2), and a plurality of suckers (19) are arranged at the bottom of the fixing plate (2) in a square array.