CN115631979A

CN115631979A - Bidirectional current hybrid direct current breaker

Info

Publication number: CN115631979A
Application number: CN202211361490.9A
Authority: CN
Inventors: 饶磊; 李少翀; 杨文�; 李佳伟
Original assignee: Dc Co Of State Grid Hubei Electric Power Co ltd
Current assignee: Dc Co Of State Grid Hubei Electric Power Co ltd
Priority date: 2022-11-02
Filing date: 2022-11-02
Publication date: 2023-01-20
Anticipated expiration: 2042-11-02
Also published as: CN115631979B

Abstract

The invention discloses a bidirectional current hybrid direct current breaker which comprises a shell, wherein a groove is formed in the inner bottom of the shell, a guide rod is fixedly connected between the inner walls of two ends of the groove, an electromagnetic block is arranged at the inner bottom of the shell, a first upright post and a second upright post which are positioned on one side of the groove are arranged at the inner top of the shell, and an automatic circuit breaking mechanism connected with the guide rod is arranged in the shell. The invention can automatically break and start the servo motor to blow and radiate the conducting strip when the circuit current is short-circuited or abnormal conditions occur, has higher automation degree and more convenient use, can automatically spray cold air to the conducting strip to radiate and cool, further improves the radiating effect of the conducting strip, simultaneously makes a sound to remind nearby workers to overhaul in time in the radiating process, and can automatically switch on the circuit to close the servo motor and the refrigerator when the circuit returns to normal, thereby saving resources and having more compact structure.

Description

Bidirectional current hybrid direct current breaker

Technical Field

The invention relates to the technical field of direct current circuit breakers, in particular to a bidirectional current hybrid direct current circuit breaker.

Background

The hybrid direct current circuit breaker is a circuit breaker which can rapidly cut off fault current and can ensure that a mechanical switch of the circuit breaker is subjected to non-arc breaking. The current path can be maintained, the influence on the power supply operation of the system can not be caused at once, and the maintenance difficulty is favorably reduced.

In the use, the circuit breaker detects the circuit in the electric current unusual, can trigger the open-circuit protection, cut off the fault current, avoid causing the burnout of circuit because of the short circuit, and when the circuit breaker detected the electric current unusual, can produce huge heat on the conducting strip, need dispel the heat and cool down so that influence subsequent normal use, in the prior art, be difficult to take place unusual back at the circuit, automatically dispel the heat and cool down the conducting strip, and the cooling mode of dispelling the heat is single, the cooling efficiency of dispelling the heat has been influenced, it is inconvenient to use, also be difficult for closing the driving source in the cooling mechanism of dispelling the heat after the circuit resumes normally, the wasting of resources is serious, still can't in time remind the staff in the while in time to overhaul, the degree of automation is low, the structural connection is not compact.

Disclosure of Invention

The invention aims to solve the defects in the prior art, and provides a bidirectional current hybrid direct current breaker.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a two-way current hybrid direct current circuit breaker, includes the casing, the interior bottom of casing is seted up flutedly, fixedly connected with guide bar between the both ends inner wall of recess, the interior bottom of casing is provided with the electromagnetism piece, the interior top of casing is provided with first stand and the second stand that is located recess one side, be provided with the automatic circuit breaking mechanism who is connected with the guide bar in the casing, it is connected with first pivot to rotate on one side inner wall of casing, between recess displacement first pivot and the electromagnetism piece, fixed mounting has servo motor on one side outer wall of casing, be provided with the first heat dissipation mechanism who is connected with first pivot in the casing, fixedly connected with slide bar between the both sides inner wall of casing, be provided with the second heat dissipation mechanism who is connected with the slide bar in the casing.

Preferably, automatic circuit-breaking mechanism includes the guide block of slip suit on the guide bar, the cover is equipped with and is located the guide block and keeps away from the first spring of electromagnetic block one side on the guide bar, the top of guide block is provided with insulator foot, insulator foot's top is rotated and is connected with the third pivot, fixed mounting has the cam on the lateral wall of third pivot, be provided with insulating arc strip on the lateral wall of cam, insulator foot's top is provided with the third stand that is located third pivot one side and leads electrical pillar, be provided with the conducting strip on the lateral wall of insulating arc strip, conducting strip displacement third stand with lead between the electrical pillar.

Preferably, the top of the insulating base is provided with a rectangular block located between the third rotating shaft and the electromagnetic block, a cavity is formed in the rectangular block, an abutting rod which is connected with the cavity in a sliding mode penetrates through the inner wall of one end of the cavity, the abutting rod is located at the outer end of the cavity and provided with an abutting block which abuts against the cam and the insulating arc strip, a pressing block is arranged at one end of the abutting rod located in the cavity, a third spring is fixedly connected between the pressing block and the inner wall of the other end of the cavity, and a magnetic strip is arranged on one side, close to the electromagnetic block, of the rectangular block.

Preferably, first heat dissipation mechanism is including setting up the first flabellum on first pivot, fixed mounting has first gear on the lateral wall of first pivot, it is connected with the second pivot to rotate on the one end inner wall of casing, the one end of second pivot run through the casing and with servo motor's output shaft fixed connection, be provided with the second flabellum on the lateral wall of second pivot, fixed mounting has the second gear on the lateral wall of second pivot, the transmission is connected with the drive belt between second gear and the first gear, insulator foot's top is provided with the fourth stand and the circular telegram post that are located third pivot opposite side, be provided with circular telegram piece on the lateral wall of insulating arc strip, circular telegram piece and circular telegram post all are located servo motor's circuit.

Preferably, second heat dissipation mechanism includes the slider of slip suit on the slide bar, the slider is provided with the extension post and extends the piece on being close to a lateral wall of recess, be provided with the push rod on the lateral wall of second pivot, be provided with pipe and box body on one side inner wall of casing, the cover is equipped with the second spring that the pipe one side was kept away from to the slider on the slide bar, it is provided with the connecting rod that is located the pipe on being close to a lateral wall of pipe to extend the piece, the one end fixed mounting that the connecting rod is located the pipe has the sliding plug with pipe inner wall sliding connection, fixed mounting has the warning piece that offsets with the pipe on the lateral wall of connecting rod.

Preferably, set up the through-hole that is located between the sliding plug and the warning piece on the pipe, be provided with the refrigerator on a lateral wall of casing, circular telegram piece and circular telegram post all are located the circuit of refrigerator, be provided with first connecting pipe and the second connecting pipe that communicates with the pipe is inside on the pipe, all be equipped with the check valve in first connecting pipe and the second connecting pipe and all be located the sliding plug and keep away from connecting rod one side, the one end that the pipe was kept away from to first connecting pipe is linked together with the refrigerator, the one end that the pipe was kept away from to the second connecting pipe is linked together with the box body, be provided with a plurality of shower nozzles on the box body.

Preferably, the abutting block and the abutting rod are integrally formed.

Preferably, the conductive sheet is located between the first stud and the second stud.

The invention has the beneficial effects that:

by arranging the electromagnetic block, the first upright post, the second upright post, the first rotating shaft, the servo motor, the automatic circuit breaking mechanism and the first heat dissipation mechanism, when the circuit current is short-circuited or abnormal conditions occur, the circuit can be automatically broken and the servo motor is started to blow and dissipate heat of the conducting strip.

Through setting up second heat dissipation mechanism, can dispel the heat the cooling to conducting strip blowout cold wind automatically, use with the heat dissipation cooperation of blowing, further improved the radiating effect of conducting strip, simultaneously in the radiating process sounding remind near staff in time to overhaul, when the circuit resumes normally, can also automatic switch-on circuit, close servo motor and refrigerator, practiced thrift the resource, the structure is compacter.

Drawings

Fig. 1 is a schematic perspective view of a bidirectional current hybrid dc circuit breaker according to the present invention;

FIG. 2 is an enlarged schematic view of the structure of FIG. 1 at A;

FIG. 3 is a schematic view of the structure of FIG. 1 at B according to the present invention;

FIG. 4 is a schematic view of the inner planar structure of the rectangular block according to the present invention;

FIG. 5 is a schematic top plan view of the insulating base of the present invention;

FIG. 6 is a schematic plan view of the inside of the circular tube according to the present invention.

In the figure: the automatic temperature control device comprises a shell 1, a groove 2, a guide rod 3, a first spring 4, an electromagnetic block 5, a magnetic strip 6, a first upright post 7, a conductive strip 8, a second upright post 9, a first connecting pipe 10, a refrigerator 11, a servo motor 12, a first rotating shaft 13, a second spring 14, a sliding rod 15, a first gear 16, a first fan blade 17, a power-on post 18, an insulating base 19, a power-on piece 20, a rectangular block 21, a push rod 22, a push block 23, a cam 24, an insulating arc strip 25, a second rotating shaft 26, a sliding block 27, a circular tube 28, a through hole 29, a reminding block 30, a connecting rod 31, an extending block 32, a push rod 33, an extending post 34, a second gear 35, a driving belt 36, a second fan blade 37, a guide block 38, a pressing block 39, a cavity 40, a third spring 41, a third upright post 42, a fourth upright post 43, a conductive post 44, a third rotating shaft 45, a sliding plug 46, a second connecting pipe 47, a box 48 and a 49 sprayer.

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.

Referring to fig. 1-6, a bidirectional current hybrid dc circuit breaker includes a housing 1, a groove 2 is formed at an inner bottom of the housing 1, a guide bar 3 is fixedly connected between inner walls of two ends of the groove 2, an electromagnetic block 5 is arranged at the inner bottom of the housing 1, a first upright post 7 and a second upright post 9 which are arranged at one side of the groove 2 are arranged at an inner top of the housing 1, an automatic circuit breaking mechanism connected with the guide bar 3 is arranged in the housing 1, the automatic circuit breaking mechanism includes a guide block 38 slidably sleeved on the guide bar 3, a first spring 4 which is arranged at one side of the guide block 38 far from the electromagnetic block 5 is sleeved on the guide bar 3, an insulating base 19 is arranged at a top of the guide block 38, a third rotating shaft 45 is rotatably connected at a top of the insulating base 19, a cam 24 is fixedly arranged on an outer side wall of the third rotating shaft 45, an insulating arc strip 25 is arranged on an outer side wall of the cam 24, the top of the insulating base 19 is provided with a third upright post 42 and a conductive post 44 which are positioned on one side of a third rotating shaft 45, the outer side wall of the insulating arc bar 25 is provided with a conductive piece 8, the conductive piece 8 is displaced between the third upright post 42 and the conductive post 44, the conductive piece 8 is positioned between the first upright post 7 and the second upright post 9, the top of the insulating base 19 is provided with a rectangular block 21 positioned between the third rotating shaft 45 and the electromagnetic block 5, a cavity 40 is formed inside the rectangular block 21, the inner wall of one end of the cavity 40 is provided with a supporting rod 22 in a penetrating manner and connected with the cavity 40 in a sliding manner, one end of the supporting rod 22 positioned outside the cavity 40 is provided with a supporting block 23 which is abutted against the cam 24 and the insulating arc bar 25, the supporting block 23 and the supporting rod 22 are integrally formed, one end of the supporting rod 22 positioned in the cavity 40 is provided with a pressing block 39, a third spring 41 is fixedly connected between the pressing block 39 and the inner wall of the other end of the cavity 40, and one side of the rectangular block 21, which is close to the electromagnetic block 5, is provided with a magnetic strip 6;

a first rotating shaft 13 is connected to the inner wall of one side of the shell 1 in a rotating manner, the groove 2 is arranged between the first rotating shaft 13 and the electromagnetic block 5, a servo motor 12 is fixedly mounted on the outer wall of one side of the shell 1, a first heat dissipation mechanism connected with the first rotating shaft 13 is arranged in the shell 1, the first heat dissipation mechanism comprises a first fan blade 17 arranged on the first rotating shaft 13, a first gear 16 is fixedly mounted on the outer side wall of the first rotating shaft 13, a second rotating shaft 26 is connected to the inner wall of one end of the shell 1 in a rotating manner, one end of the second rotating shaft 26 penetrates through the shell 1 and is fixedly connected with an output shaft of the servo motor 12, a second fan blade 37 is arranged on the outer side wall of the second rotating shaft 26, a second gear 35 is fixedly mounted on the outer side wall of the second rotating shaft 26, a transmission belt 36 is connected between the second gear 35 and the first gear 16 in a transmission manner, a fourth upright column 43 and a power-on column 18 which are arranged on the other side of the third rotating shaft 45 are arranged on the top of the insulating base 19, a power-on plate 20 is arranged on the outer side of the insulating arc strip 25, and the power-on plates 20 and the power-on columns 18 are both positioned in a circuit of the servo motor 12;

a sliding rod 15 is fixedly connected between the inner walls of the two sides of the shell 1, a second heat dissipation mechanism connected with the sliding rod 15 is arranged in the shell 1, the second heat dissipation mechanism comprises a sliding block 27 which is slidably sleeved on the sliding rod 15, an extension column 34 and an extension block 32 are arranged on one side wall, close to the groove 2, of the sliding block 27, a push rod 33 is arranged on the outer side wall of the second rotating shaft 26, a round pipe 28 and a box body 48 are arranged on the inner wall of one side of the shell 1, a second spring 14, far away from one side of the round pipe 28, of the sliding block 27 is sleeved on the sliding rod 15, a connecting rod 31 located in the round pipe 28 is arranged on one side wall, close to the round pipe 28, of the extension block 32, a sliding plug 46 which is slidably connected with the inner wall of the round pipe 28 is fixedly arranged at one end, located in the round pipe 28, of the connecting rod 31, fixed mounting has the warning piece 30 that offsets with pipe 28 on the lateral wall of connecting rod 31, set up the through-hole 29 that is located sliding plug 46 and between the warning piece 30 on the pipe 28, be provided with refrigerator 11 on the lateral wall of casing 1, circular telegram piece 20 all is located the circuit of refrigerator 11 with circular telegram post 18, be provided with first connecting pipe 10 and the second connecting pipe 47 that are linked together with the inside of pipe 28 on the pipe 28, all be equipped with the check valve in first connecting pipe 10 and the second connecting pipe 47 and all be located sliding plug 46 and keep away from connecting rod 31 one side, the one end that pipe 28 was kept away from to first connecting pipe 10 is linked together with refrigerator 11, the one end that pipe 28 was kept away from to second connecting pipe 47 is linked together with box body 48, be provided with a plurality of shower nozzles 49 on the box body 48.

When the electromagnetic block is used, through a short circuit of circuit current or an abnormal condition, the instantaneous voltage on the electromagnetic block 5 is increased, the magnetic force of the electromagnetic block 5 is enhanced, the surface temperature of the conducting strip 8 is increased, the repulsive force to the magnetic strip 6 is increased, so that the guiding block 38 slides in the direction away from the electromagnetic block 5, the first spring 4 is compressed, the conducting strip 8 above the insulating base 19 moves in the direction away from the electromagnetic block 5 due to the movement of the guiding block 38, the conducting strip 8, the energizing piece 20 and the cam 24 rotate around the axis of the third rotating shaft 45, so that the conducting strip 8 is away from the conducting post 44, the automatic circuit breaking effect is realized, when the conducting strip 8 rotates around the axis of the third rotating shaft 45, the outer side wall of the cam 24 is always contacted with the energizing piece 23 in the rotating process by arranging the abutting rod 22, the abutting block 23 and the third spring 41 (initially in a compressed state), when the guiding block 38 moves to the farthest distance from the electromagnetic block 5, the abutting rod 24 and the cam 24 is close to the protrusion 43 of the electromagnetic block 18, and the electromagnetic block 18 is contacted with the third rotating shaft 18, and the energizing piece 18;

when the electrified piece 20 and the electrified column 18 are contacted with each other, the servo motor 12 and the refrigerator 11 are both switched on to a circuit, the servo motor 12 enables the second rotating shaft 26 to rotate, the first fan blade 17 on the first rotating shaft 13 and the second fan blade 37 on the second rotating shaft 26 are enabled to rotate through the arrangement of the first gear 16, the second gear 35 and the transmission belt 36, so that the conducting piece 8 and the electrified piece 20 are blown to dissipate heat, the second rotating shaft 26 rotates, meanwhile, the push rod 33 rotates around the axis of the second rotating shaft 26, and in the rotating process of the push rod 33, the push rod 33 is enabled to be contacted with the extending column 34 firstly and then separated from the extending column 34 through the arrangement of the second spring 14 (initially in a compressed state), the slide rod 15, the slide block 27 and the extending column 34;

when the push rod 33 and the extension column 34 are contacted with each other to be separated, the slide block 27 drives the extension block 32 and the reminding block 30 to slide in a direction away from the circular tube 28, the second spring 14 is further compressed, the extension block 32 drives the sliding plug 46 on the connecting rod 31 to slide in a direction close to the second rotating shaft 26, so that a suction effect is generated, cold air generated by the operation of the refrigerator 11 is sucked into the circular tube 28 through the first connecting tube 10, when the push rod 33 is not contacted with the extension column 34, the slide block 27 returns to an initial position through elastic force generated by the compression of the second spring 14, so that the reminding block 30 and the circular tube 28 collide with each other to generate sound, so as to remind a worker to overhaul, and simultaneously, the sliding plug 46 returns to the initial position, the cold air sucked into the circular tube 28 is extruded into the box body 48 through the second connecting tube 47 and is sprayed out through the spray nozzle 49 on the box body 48 to cool the conducting sheet 8 and the conducting sheet 20;

when the maintenance circuit is restored to a normal state, the magnetism of the electromagnetic block 5 is reduced, the elastic force generated by the compression of the first spring 4 enables the guide block 38 to return to the initial position, the guide block 38 drives the conductive sheet 8 to move, the conductive sheet 8 is in contact with the first upright post 7 in the moving process, the first upright post 7 forms a blocking effect on the movement of the conductive sheet 8 in the linear direction, so that the conductive sheet 8 rotates towards the other direction around the axis of the third rotating shaft 45, the outer side wall of the cam 24 is in contact with the abutting block 23 all the time in the rotating process again by arranging the abutting rod 22, the abutting block 23 and the third spring 41 (in an initial compressed state), when the guide block 38 returns to the initial position, the conductive sheet 8 is in contact with the conductive post 44, the energizing sheet 20 is separated from the energizing post 18 and is in contact with the fourth upright post 43, and the servo motor 12 and the refrigerator 11 do not work any more.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. The utility model provides a two-way current hybrid direct current circuit breaker, includes casing (1), its characterized in that, recess (2) have been seted up to the interior bottom of casing (1), fixedly connected with guide bar (3) between the both ends inner wall of recess (2), the interior bottom of casing (1) is provided with electromagnetic block (5), the interior top of casing (1) is provided with first stand (7) and second stand (9) that are located recess (2) one side, be provided with the automatic breaking mechanism who is connected with guide bar (3) in casing (1), it is connected with first pivot (13) to rotate on one side inner wall of casing (1), between recess (2) displacement first pivot (13) and electromagnetic block (5), fixed mounting has servo motor (12) on one side outer wall of casing (1), be provided with the first heat dissipation mechanism who is connected with first pivot (13) in casing (1), fixedly connected with slide bar (15) between the both sides inner wall of casing (1), be provided with the second heat dissipation mechanism who is connected with slide bar (15) in casing (1).

2. The bidirectional current hybrid direct current circuit breaker according to claim 1, wherein the automatic circuit breaking mechanism comprises a guide block (38) slidably sleeved on a guide rod (3), a first spring (4) located on one side, far away from the electromagnetic block (5), of the guide block (38) is sleeved on the guide rod (3), an insulating base (19) is arranged at the top of the guide block (38), a third rotating shaft (45) is rotatably connected to the top of the insulating base (19), a cam (24) is fixedly mounted on the outer side wall of the third rotating shaft (45), an insulating arc strip (25) is arranged on the outer side wall of the cam (24), a third column (42) and a conductive column (44) located on one side of the third rotating shaft (45) are arranged at the top of the insulating base (19), an insulating sheet (8) is arranged on the outer side wall of the insulating arc strip (25), and the conductive sheet (8) is displaced between the third column (42) and the conductive column (44).

3. The bidirectional current hybrid direct current circuit breaker according to claim 2, wherein a rectangular block (21) located between the third rotating shaft (45) and the electromagnetic block (5) is disposed at the top of the insulating base (19), a cavity (40) is formed inside the rectangular block (21), a supporting rod (22) slidably connected with the cavity (40) is disposed through an inner wall of one end of the cavity (40), a supporting block (23) abutting against the cam (24) and the insulating arc bar (25) is disposed at one end of the supporting rod (22) located outside the cavity (40), a pressing block (39) is disposed at one end of the supporting rod (22) located inside the cavity (40), a third spring (41) is fixedly connected between the pressing block (39) and an inner wall of the other end of the cavity (40), and a magnetic strip (6) is disposed on one side of the rectangular block (21) close to the electromagnetic block (5).

4. The bidirectional current hybrid direct current circuit breaker according to claim 2, wherein the first heat dissipation mechanism includes a first fan blade (17) disposed on the first rotating shaft (13), a first gear (16) is fixedly mounted on an outer side wall of the first rotating shaft (13), a second rotating shaft (26) is rotatably connected on an inner wall of one end of the housing (1), one end of the second rotating shaft (26) penetrates through the housing (1) and is fixedly connected with an output shaft of the servo motor (12), a second fan blade (37) is disposed on an outer side wall of the second rotating shaft (26), a second gear (35) is fixedly mounted on an outer side wall of the second rotating shaft (26), a transmission belt (36) is connected between the second gear (35) and the first gear (16), a fourth column (43) and a power-on column (18) disposed on the other side of the third rotating shaft (45) are disposed on a top of the insulating base (19), a plate (20) is disposed on an outer side wall of the insulating arc bar (25), and the plate (20) and the power-on column (18) are both disposed in a circuit of the servo motor (12).

5. The bidirectional current hybrid direct current circuit breaker according to claim 4, wherein the second heat dissipation mechanism comprises a sliding block (27) slidably sleeved on the sliding rod (15), the sliding block (27) is provided with an extension column (34) and an extension block (32) on a side wall close to the groove (2), a push rod (33) is arranged on the outer side wall of the second rotating shaft (26), a circular tube (28) and a box body (48) are arranged on the inner wall of one side of the casing (1), the sliding rod (15) is sleeved with a second spring (14) with the sliding block (27) away from one side of the circular tube (28), a connecting rod (31) located in the circular tube (28) is arranged on a side wall close to the circular tube (28) of the extension block (32), a sliding plug (46) slidably connected with the inner wall of the circular tube (28) is fixedly installed at one end of the connecting rod (31) located in the circular tube (28), and a reminding block (30) abutting against the circular tube (28) is fixedly installed on the outer side wall of the connecting rod (31).

6. The bidirectional current hybrid direct current circuit breaker according to claim 5, wherein a through hole (29) between the sliding plug (46) and the reminding block (30) is formed in the circular tube (28), a refrigerator (11) is arranged on one outer side wall of the housing (1), the energizing piece (20) and the energizing column (18) are both located in a circuit of the refrigerator (11), the circular tube (28) is provided with a first connecting tube (10) and a second connecting tube (47) which are communicated with the inside of the circular tube (28), the first connecting tube (10) and the second connecting tube (47) are both provided with one-way valves and are both located on one side of the sliding plug (46) away from the connecting rod (31), one end of the first connecting tube (10) away from the circular tube (28) is communicated with the refrigerator (11), one end of the second connecting tube (47) away from the circular tube (28) is communicated with the box body (48), and the box body (48) is provided with a plurality of spray heads (49).

7. A bidirectional current hybrid DC circuit breaker as claimed in claim 5, characterized in that said catch (23) is formed integrally with the catch lever (22).

8. A bidirectional current hybrid dc circuit breaker as claimed in claim 2, characterized in that said conductive sheet (8) is located between the first (7) and second (9) uprights.