阅读说明：本技术 一种用于电路紧急保护的装置 (Device for emergency protection of circuit ) 是由 肖佳丽 于 2021-09-12 设计创作，主要内容包括：本发明公开了一种用于电路紧急保护的装置,涉及到电路保护领域,包括保护机壳,保护机壳上端的输入接线端子分别电性连接有输入触片,输入触片下端设有弹性断触片,弹性断触片下端所连接的电线下端设有电线连接触片,保护机壳下端设有的输出接线端子内端连接有输出触片,且两个输出触片与两个电线连接触片之间由可更换式保险丝组件连接,有益效果：本发明在保险丝发生熔断时,将保险丝插座拆卸,即可对保险丝插座中卡设的保险丝进行更换,再将保险丝插座重新插入保护机壳的侧滑腔中,重新使得保险丝对两对电线连接触片、输出触片进行电路接通即可,既无需对整体机壳进行拆卸,而且对保险丝的更换简单便捷。(The invention discloses a device for circuit emergency protection, which relates to the field of circuit protection and comprises a protection shell, wherein an input wiring terminal at the upper end of the protection shell is respectively and electrically connected with an input contact piece, the lower end of the input contact piece is provided with an elastic breaking contact piece, the lower end of an electric wire connected with the lower end of the elastic breaking contact piece is provided with an electric wire connecting contact piece, the inner end of an output wiring terminal arranged at the lower end of the protection shell is connected with an output contact piece, and the two output contact pieces are connected with the two electric wire connecting contact pieces through a replaceable fuse component, so that the device has the advantages that: when the fuse is fused, the fuse socket is disassembled, the fuse clamped in the fuse socket can be replaced, then the fuse socket is inserted into the lateral sliding cavity of the protective shell again, and the fuse is enabled to conduct circuit connection on the two pairs of wire connecting contact pieces and the output contact pieces again, so that the integral shell does not need to be disassembled, and the fuse is simple and convenient to replace.)

1. A device for emergency protection of an electric circuit, comprising a protective casing (1), characterized in that: the upper end of the protection shell (1) is provided with a pair of input connecting terminals (2), the two input connecting terminals (2) are respectively and electrically connected with an input contact sheet (201) and extend into the protection shell (1), the lower ends corresponding to the two input contact sheets (201) are respectively provided with a pair of elastic breaking contact sheets (3), the lower ends of the two elastic breaking contact sheets (3) are respectively connected with an electric wire (4), the lower end of the electric wire (4) is connected with a fixed electric wire connecting contact sheet (401), the lower end of the protection shell (1) is provided with a pair of output connecting terminals (8), the two output connecting terminals (8) are respectively and electrically connected with an output contact sheet (801) and extend into the protection shell (1), the two output contact sheets (801) and the two electric wire connecting contact sheets (401) are connected by a replaceable fuse component, one side corresponding to the upper end positions of the two elastic breaking contact sheets (3) is provided with a linkage curved rod member (10), a linkage curved rod piece (10) is connected to one side of each elastic breaking contact piece (3) in a rotating mode through a pin, a shifting rod (1002) is arranged on the linkage curved rod piece (10), the shifting rod (1002) pulls the upper ends of the two elastic breaking contact pieces (3), a torsion spring (1003) is arranged at the switching position of the linkage curved rod piece (10) and the pin, an armature (1001) is fixed at one end, far away from the elastic breaking contact pieces (3), of the linkage curved rod piece (10), two wires (4) penetrate through the middle of the zero sequence transformer (5), a first coil is wound outside the zero sequence transformer (5), a release (9) is arranged on one side, far away from the elastic breaking contact pieces (3), a second coil is wound outside the release (9), the first coil is connected with the second coil through wires, the magnetization end of the release (9) is arranged on one side close to the armature (1001), a switch (11) is arranged on one side, far away from the release (9), of the protective case (1), the inner end of the switch (11) is hinged with a traction rod piece (12), and the other end of the traction rod piece (12) is hinged with one end, far away from the release (9), of the linkage curved rod piece (10).

2. An apparatus for circuit emergency protection according to claim 1, wherein: the linkage curved rod piece (10) is provided with a pair of shifting rods (1002) corresponding to the upper ends of the two elastic breaking contact pieces (3) in a switching mode, the two shifting rods (1002) in each pair of shifting rods (1002) are respectively attached to the two sides of the elastic breaking contact pieces (3) in a rolling mode, and a ceramic insulating sleeve is sleeved outside each shifting rod (1002).

3. An apparatus for circuit emergency protection according to claim 1, wherein: removable formula fuse subassembly is including placing fuse socket (6) inside protection casing (1) in, protection casing (1) is located and has seted up the sideslip chamber between wire connection contact (401) and output contact (801), and fuse socket (6) insert along the cooperation of one side opening in the chamber that sideslips, and fuse card chamber has been seted up to the position that fuse socket (6) middle part corresponds two pairs of wire connection contacts (401) and output contact (801), and the cooperation card is equipped with fuse (7) in the fuse card chamber, and corresponding wire connection contact (401), output contact (801) electrical contact are distinguished in fuse contact end (701) of the upper and lower extreme of two fuse (7).

4. An apparatus for circuit emergency protection according to claim 3, wherein: the outer end of the fuse socket (6) is provided with a bolt fixing hole seat, and the bolt fixing hole seat arranged on the fuse socket (6) is fixed on the protective casing (1) through a bolt.

5. An apparatus for circuit emergency protection according to claim 1, wherein: an air inlet (1401) is formed in one side of the bottom of the protective casing (1), an air outlet (16) is formed in the side wall of the protective casing (1), and dustproof filter screens are arranged at openings of the air inlet (1401) and the air outlet (16).

6. An apparatus for circuit emergency protection according to claim 5, wherein: and a heat radiation fan (14) is connected to the port close to the inner side end of the air inlet (1401), and an air guide assembly (15) is arranged above the heat radiation fan (14).

7. An apparatus for circuit emergency protection according to claim 6, wherein: the air guide assembly (15) is composed of a plurality of air guide sheets fixed inside the protective casing (1), and the plurality of air guide sheets are obliquely or vertically guided to all directions inside the protective casing (1).

8. An apparatus for circuit emergency protection according to claim 1, wherein: the protection device is characterized in that a warning device (13) is arranged above the tripper (9), the input end of the warning device (13) is electrically connected with a second coil wound on the tripper (9), a whistle alarm and a warning lamp are integrated on the warning device (13), and the warning lamp is arranged outside the protection shell (1).

Technical Field

The invention relates to the field of circuit protection, in particular to a device for emergency protection of a circuit.

Background

The circuit emergency protector is mainly used for protecting the electric shock of a person with fatal danger when the equipment has electric leakage fault, has the functions of overload and short circuit protection, and can be used for protecting the overload and short circuit of a line or a motor. When a short circuit occurs, the temperature of a fuse of a circuit breaker in the conventional circuit emergency protection device rises and is fused, the fuse is very troublesome to replace in the conventional technology, a shell needs to be detached during replacement, and electric shock accidents are easy to occur due to manual replacement.

Prior art CN201910578276.0 discloses a fuse that can change automatically, the right side fixed mounting of fuse shell has fixed frame, the inside well upper end fixed mounting of fuse shell has the contact strip, and the contact overlap joint of touching electricity strip left end has the fuse, and the becket has been cup jointed at the middle part of fuse, and the right-hand member fixed mounting of becket has the connecting rod, and the right-hand member fixed mounting of connecting rod has the fixed block, the surface movable mounting of fixed block has the commentaries on classics board, the right-hand member fixed mounting who changes the board has fixed ball. Through the matching use of the metal ring, the first fuse, the rotating plate, the hinge rod, the second fuse and the balance plate, when the circuit is disconnected due to excessive current and excessive heat caused by instantaneous excessive current of the fuse, the first fuse can be effectively ensured to slowly fall down through the matching use of the metal ring and the balance plate, so that the right ends of the remaining contact bars of the second fuse are in electric shock contact, the circuit is switched on, the automatic replacement is realized, the manual replacement is not needed, and the safety of people is ensured; the first fuse and the second fuse are left in the file for switching use, however, after the two fuses are all fused, the fuse shell still needs to be manually disassembled, the two damaged fuses are replaced, and the problem that a worker cannot put the fuse into the replacement process by switching on the circuit carelessly is solved fundamentally.

Disclosure of Invention

The present invention is directed to a device for emergency protection of a circuit to solve the problems set forth in the background art.

In order to achieve the purpose, the invention provides the following technical scheme: a device for emergency circuit protection comprises a protective casing, wherein a pair of input connection terminals are arranged at the upper end of the protective casing, two input connection terminals are respectively and electrically connected with input contact pieces and extend into the protective casing, a pair of elastic breaking contact pieces are respectively arranged at the lower ends corresponding to the two input contact pieces, electric wires are respectively connected at the lower ends of the two elastic breaking contact pieces, the lower ends of the electric wires are connected with fixed electric wire connection contact pieces, a pair of output connection terminals are arranged at the lower end of the protective casing, output contact pieces are respectively and electrically connected with the two output contact pieces and extend into the protective casing, the two output contact pieces and the two electric wire connection contact pieces are connected through a replaceable fuse component, a linkage curved rod piece is arranged at one side corresponding to the upper end positions of the two elastic breaking contact pieces and is connected with one side of the elastic breaking contact pieces through pins, be equipped with the driving lever card on the linkage curved bar and establish the upper end of drawing two elasticity disconnected contact pieces, the linkage curved bar is equipped with the torsional spring with the switching department of pin, and the linkage curved bar is kept away from the one end of elasticity disconnected contact piece and is fixed with armature, two the electric wire passes along zero sequence transformer middle part, and zero sequence transformer outside is rolled up there is first coil, and the one side that is located armature is equipped with the release, and the release outside is rolled up there is the second coil, and first coil and second coil connection of electric lines, the magnetization end of release set up with be close to one side of armature, one side that the release was kept away from to the protecting sheathing is equipped with the switch, and the inner of switch articulates there is the traction bar, and the other end of traction bar is articulated mutually with the one end that the linkage curved bar kept away from the release.

Preferably, the linkage curved rod piece is respectively connected with a pair of shifting rods in a switching mode corresponding to the upper ends of the two elastic breaking contact pieces, the two shifting rods in each pair of shifting rods are respectively attached to two sides of the elastic breaking contact pieces in a rolling mode, and a ceramic insulating sleeve is sleeved outside the shifting rods.

Preferably, the replaceable fuse component comprises a fuse socket arranged in the protection shell, the protection shell is located between the electric wire connecting contact and the output contact and is provided with a lateral sliding cavity, the fuse socket is inserted along the opening on one side of the lateral sliding cavity in a matched mode, the middle of the fuse socket is provided with fuse clamping cavities corresponding to the positions of the two pairs of electric wire connecting contacts and the output contact, fuses are arranged in the fuse clamping cavities in a matched mode, and the fuse contact ends of the upper end and the lower end of each fuse are in electrical contact with the corresponding electric wire connecting contact and the corresponding output contact respectively.

Preferably, the outer end of the fuse socket is provided with a bolt fixing hole seat, and the bolt fixing hole seat arranged on the fuse socket is fixed on the protective casing through a bolt.

Preferably, one side of the bottom of the protective casing is provided with an air inlet, the side wall of the protective casing is provided with an air outlet, and the openings of the air inlet and the air outlet are respectively provided with a dustproof filter screen.

Preferably, the port close to the inner side of the air inlet is connected with a cooling fan, and an air guide assembly is arranged above the cooling fan.

Preferably, the air guide assembly is composed of a plurality of air guide plates fixed inside the protective casing, and the plurality of air guide plates are obliquely or vertically guided to each direction inside the protective casing.

Preferably, the alarm is arranged above the release, the input end of the alarm is electrically connected with the second coil wound on the release, the whistle alarm and the warning lamp are integrated on the alarm, and the warning lamp is arranged outside the protective shell.

The invention has the technical effects and advantages that:

1. when electric leakage or human electric shock occurs IN an electric appliance, IL is not equal to IN, magnetic fields IN the zero sequence mutual inductors cannot be mutually counteracted, induced voltage exists IN the first coil, current passes through the second coil, at the moment, the tripper is magnetized to attract the armature, so that the upper ends of the two elastic breaking contact pieces are pulled by the linkage curved rod piece to be separated from the input contact piece, the switch is disconnected, a power supply is cut off, and the protection effect is achieved;

2. when the fuse is fused, the bolt for fixing the fuse socket is disassembled, then the fuse socket is pulled and taken out, the fuse clamped in the fuse socket can be replaced, then the fuse socket is inserted into the lateral sliding cavity of the protective shell again, the fuse is enabled to conduct circuit connection on the two pairs of wire connecting contact pieces and the output contact pieces again, the integral shell does not need to be disassembled, and the fuse is replaced simply and conveniently;

3. the invention sucks external cold air under the work of the cooling fan, and the cold air is guided by each air guide sheet in the air guide assembly, and the plurality of air guide sheets in the air guide assembly are guided to each direction in the protective shell in an oblique or vertical direction, so that the external air can be guided to each part in the protective shell, and comprehensive and effective cooling is realized.

Drawings

Fig. 1 is a half-sectional view 1 of a three-dimensional structure of the present invention.

Fig. 2 is a half-sectional view 2 of the three-dimensional structure of the present invention.

Fig. 3 is a front sectional view of the structure of the present invention when it is open.

Fig. 4 is a front sectional view of the structure of the present invention in a closed circuit.

FIG. 5 is a front sectional view of the fuse socket of the present invention after removal.

In the figure: 1. a protective housing; 2. an input connecting terminal; 201. an input contact piece; 3. an elastic breaking contact piece; 4. an electric wire; 401. the wire is connected with the contact piece; 5. a zero sequence transformer; 6. a fuse socket; 7. a fuse; 701. a fuse contact; 8. an output terminal; 801. an output contact piece; 9. a release; 10. linking the curved rod pieces; 1001. an armature; 1002. a deflector rod; 1003. a torsion spring; 11. a switch; 12. a traction bar; 13. an alarm; 14. a heat radiation fan; 1401. an air inlet; 15. an air guide assembly; 16. an air outlet.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention provides a device for emergency circuit protection as shown in fig. 1-5, which comprises a protective casing 1, a pair of input connection terminals 2 are arranged at the upper end of the protective casing 1, the terminals of a live wire L and a zero wire N are respectively arranged at the upper end of the protective casing 1, two input connection terminals 2 are respectively electrically connected with an input contact 201 and extend into the protective casing 1, a pair of elastic breaking contacts 3 are respectively arranged at the lower ends corresponding to the two input contact pads 201, the lower ends of the two elastic breaking contacts 3 are respectively connected with an electric wire 4, the lower end of the electric wire 4 is connected with a fixed electric wire connecting contact 401, a pair of output connection terminals 8 are arranged at the lower end of the protective casing 1, an output contact 801 is respectively and electrically connected with the two output contact terminals 8 and extends into the protective casing 1, the two output contact pads 801 are connected with the two electric wire connecting contacts 401 by a replaceable fuse component, a linkage curved rod 10 is arranged at one side corresponding to the upper end positions of the two elastic breaking contacts 3, the linkage curved rod piece 10 is connected with one side of the elastic breaking contact piece 3 through a pin, a poking rod 1002 is arranged on the linkage curved rod piece 10 and is clamped and arranged on the upper end of the two elastic breaking contact pieces 3, a torsional spring 1003 is arranged at the connection position of the linkage curved rod piece 10 and the pin, under the action of the elasticity of the torsion spring 1003, the deflector rod 1002 on the linkage curved bar 10 draws the upper ends of the two elastic breaking contact pieces 3, so as to ensure that the upper ends of the two elastic breaking contact pieces 3 are contacted and electrified with the corresponding input contact piece 201, wherein, a pair of shifting rods 1002 are respectively connected with the positions of the linkage curved rod piece 10 corresponding to the upper ends of the two elastic breaking contact pieces 3, the two shifting rods 1002 in each pair of shifting rods 1002 respectively roll and attach to the two sides of the elastic breaking contact pieces 3, in the shifting process of the shifting rod 1002 to the elastic breaking contact piece 3, abrasion to the elastic breaking contact piece 3 is reduced, and a ceramic insulating sleeve is sleeved outside the shifting rod 1002 and has a good insulating effect.

Referring to fig. 1 and 3, an armature 1001 is fixed to one end of the linkage curved rod 10 away from the elastic breaking contact piece 3, two electric wires 4 pass through the middle of the zero sequence transformer 5, a first coil is wound outside the zero sequence transformer 5, a release 9 is arranged on one side of the armature 1001, a second coil is wound outside the release 9, the first coil is connected with the second coil through an electric wire, and a magnetization end of the release 9 is arranged on one side close to the armature 1001, as shown IN fig. 3, when the switch is IN a closed state, IL = IN, but the directions are opposite, magnetic fields generated IN the zero sequence transformer 5 are mutually cancelled, no induced voltage exists IN the first coil, and no current exists IN the second coil; as shown IN fig. 3, when an electric appliance leaks electricity or an electric shock occurs, IL ≠ IN, the magnetic fields IN the zero-sequence transformer 5 cannot be cancelled each other, there is induced voltage IN the first coil, there is current passing IN the second coil, the tripper 9 is magnetized to attract the armature 1001 at this time, thereby the upper ends of the two elastic breaking contacts 3 are pulled by the linkage curved rod 10 to be separated from the input contact 201, the switch disconnection is realized, the power supply is cut off, the protection effect is achieved, one side of the protection case 1, which is far away from the tripper 9, is provided with the switch 11, the inner end of the switch 11 is hinged with the traction rod 12, the other end of the traction rod 12 is hinged with one end of the linkage curved rod 10, which is far away from the tripper 9, and the power supply switch can be opened and closed manually by a person outside.

Be located the top of release 9 and be equipped with attention device 13, the second coil electric connection of winding on the input of attention device 13 and the release 9, the collection whistle siren and warning light on the attention device 13, the warning light sets up IN protection casing 1's outside, when above-mentioned electrical apparatus electric leakage or people electrocute, IL ≠ IN, magnetic field can not offset each other IN the zero sequence transformer 5, there is induced voltage IN the first coil, there is the electric current to pass through IN the second coil, supply electric power to attention device 13 by the second coil, make the collection whistle siren send out the alarm sound on the attention device 13, and the warning light flickers.

The replaceable fuse component comprises a fuse socket 6 arranged in a protective shell 1, a side sliding cavity is arranged between an electric wire connecting contact piece 401 and an output contact piece 801 of the protective shell 1, the fuse socket 6 is inserted along an opening on one side of the side sliding cavity in a matching way, fuse card cavities are arranged in the middle of the fuse socket 6 corresponding to the positions of the two pairs of electric wire connecting contact pieces 401 and the output contact piece 801, a fuse 7 is arranged in the fuse card cavities in a matching way, when the fuse socket 6 is completely inserted, fuse contact ends 701 at the upper end and the lower end of the two fuses 7 are respectively in electric contact with the corresponding electric wire connecting contact piece 401 and the output contact piece 801, so as to communicate a circuit, a bolt fixing hole seat is arranged at the outer end of the fuse socket 6, the bolt fixing hole seat arranged on the fuse socket 6 is fixed on the protective shell 1 through a bolt, when the fuse 7 is fused, the bolt for fixing the fuse socket 6 is disassembled, and then the fuse socket 6 is pulled and taken out, so that the fuse 7 clamped in the fuse socket 6 can be replaced, the fuse socket 6 is inserted into the sideslip cavity of the protective casing 1 again, and the fuse 7 is enabled to conduct a circuit to the two pairs of electric wire connecting contact pieces 401 and the output contact piece 801 again, so that the integral casing is not required to be detached, and the fuse 7 is replaced simply and conveniently.

Referring to fig. 2 and 4, an air inlet 1401 is disposed at one side of the bottom of the protection casing 1, an air outlet 16 is disposed at a side wall of the protection casing 1 for dissipating heat generated by the unit in the protection casing 1 during operation through air circulation, dust-proof filter screens are disposed at openings of the air inlet 1401 and the air outlet 16 to prevent dust in the outside air from entering the protection casing 1, a heat dissipation fan 14 is connected to an inner side port close to the air inlet 1401, an air guide assembly 15 is disposed above the heat dissipation fan 14, the air guide assembly 15 is composed of a plurality of air guide plates fixed in the protection casing 1, the plurality of air guide plates are obliquely or vertically oriented to each direction in the protection casing 1, and under the operation of the heat dissipation fan 14 and the action of each air guide plate in the air guide assembly 15, the outside air is guided to each position in the protection casing 1 to achieve overall operation, And (3) effective heat dissipation.

The working principle of the invention is as follows: when the invention is used, when an electric appliance leaks electricity or an electric shock occurs, IL is not equal to IN, magnetic fields IN the zero sequence mutual inductor 5 can not be mutually counteracted, induced voltage exists IN the first coil, current passes through the second coil, and at the moment, the tripper 9 is magnetized to attract the armature 1001, so that the upper ends of the two elastic breaking contact pieces 3 are pulled by the linkage curved rod piece 10 to be separated from the input contact piece 201, the switch is disconnected, the power supply is cut off, and the protection effect is achieved;

when the fuse 7 is fused, the bolt for fixing the fuse socket 6 is detached, then the fuse socket 6 is pulled and taken out, the fuse 7 clamped in the fuse socket 6 can be replaced, then the fuse socket 6 is inserted into the sideslip cavity of the protective case 1 again, and the fuse 7 is enabled to conduct circuit connection on the two pairs of electric wire connecting contact pieces 401 and the output contact piece 801 again, so that the integral case does not need to be detached, and the fuse 7 is replaced simply and conveniently;

the invention sucks external cold air under the work of the cooling fan 14, and the cold air is guided by each air guide sheet in the air guide assembly 15, and the plurality of air guide sheets in the air guide assembly 15 are guided to each direction in the protection casing 1 in an oblique or vertical direction, so that the external air can be guided to each part in the protection casing 1, and comprehensive and effective heat dissipation is realized.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.