CN113394060B - A high voltage DC circuit breaker - Google Patents

Abstract

The invention relates to the technical field of circuit breakers, in particular to a high-voltage direct-current circuit breaker, which comprises a circuit breaker body, a mounting plate and a protective cover, wherein the circuit breaker body and the mounting plate are fixedly connected together; the clamping mechanism comprises a clamping tongue, a rotating groove is formed in one side, close to the circuit breaker body, of the mounting plate, and the clamping tongue is connected with the inner wall of the rotating groove in a rotating mode. The circuit breaker body 1 can be completely isolated from the outside air, the circuit breaker body 1 can be ensured to work normally under a severe environment, the connection between the lead and the circuit breaker body 1 is very quick and convenient, and the connection relation between the lead and the circuit breaker body 1 can be ensured to be firm all the time.

Description

A high voltage DC circuit breaker

technical field

The invention relates to the technical field of circuit breakers, in particular to a high-voltage direct current circuit breaker.

Background technique

The DC circuit breaker combines power electronic devices and is a circuit breaker used to break the DC circuit. The moment when the DC circuit is realized is the current zero-crossing point. DC circuit breakers can generally be divided into mechanical DC circuit breakers, solid-state DC circuit breakers and hybrid DC circuit breakers. Among them, the control of power electronic devices and DC arc extinguishing are the key technologies of DC circuit breakers.

After retrieval, the application number is a small DC circuit breaker disclosed in 201610491531.4, including a casing, a handle, an operating mechanism, a thermal release unit, a magnetic release unit, a moving contact, a static contact, an arc extinguishing chamber, a control circuit breaker, circuit current detection unit, leakage current detection unit, and circuit breaker state monitoring unit, wherein: the circuit current detection unit realizes the detection of the main circuit current of the small DC circuit breaker; the small DC circuit breaker according to the present invention can realize the circuit breaker The basic functions of the device, as well as the monitoring of its own loop current and leakage current, closing or opening status, and fault alarm status.

However, the existing DC circuit breakers have some disadvantages;

1. The existing circuit breakers are basically installed in the distribution box. However, the existing distribution box is usually poorly sealed. When it is in an environment with heavy moisture or dust in the outside air, such as ship cabins The circuit breakers in China or cement plants are prone to rust or dust adhesion, resulting in poor conductivity or even damage to the circuit breaker, affecting the normal use of the circuit breaker;

2. When the wire and the circuit breaker are connected together, they are generally connected by bolts. Therefore, during the wiring process, it is necessary to hold the wire to its limit and then fix it by bolts. For some peripheral components or installation locations For circuit breakers that are narrow and inaccessible by hand, wiring is inconvenient.

Therefore, we propose a high-voltage DC circuit breaker to solve the above problems.

SUMMARY OF THE INVENTION

The purpose of the present invention is to propose a high-voltage DC circuit breaker in order to solve the shortcomings existing in the prior art.

In order to achieve the above purpose, the present invention adopts the following technical solutions: a high-voltage DC circuit breaker, comprising a circuit breaker body, a mounting plate and a protective cover, the circuit breaker body and the mounting plate are fixedly connected together, and the mounting plate is close to the circuit breaker One side of the circuit breaker body is provided with a clamping mechanism, the top and bottom of the circuit breaker body are provided with two wiring mechanisms, the inner walls of both sides of the protective cover are provided with clamping grooves, and the protective cover is provided with sealing mechanism;

Wherein, the clamping mechanism includes a tab, a rotation slot is formed on the side of the mounting plate close to the circuit breaker body, and the tab and the inner wall of the rotation slot are rotatably connected together;

The sealing mechanism includes a rectangular frame, the side of the rectangular frame away from the circuit breaker body is fixedly installed with four rectangularly distributed cylinders, and the four cylinders are all provided with rectangular plates, and the sides of the four rectangular plates away from each other are respectively It is fixedly connected with the inner walls on both sides of the protective cover, and the four cylinders respectively penetrate the corresponding rectangular plates and are slidably connected with the corresponding rectangular plates;

The wiring mechanism includes a wiring barrel, copper sheets are fixedly installed on both inner walls of the wiring barrel, a linkage mechanism is arranged in the wiring barrel, and the linkage mechanism is located below the two copper sheets;

The linkage mechanism includes two pull rods, the tops of the two pull rods are hinged together with the bottoms of the corresponding copper sheets, the bottom ends of the two pull rods are fixedly installed with the same circular block, and the circular plate is fixedly installed in the wire barrel, The two pull rods pass through the circular plate and are slidably connected with the circular plate, and an opening mechanism is arranged between the circular block and the circular plate;

The opening mechanism includes a rotating column on which two connecting plates are arranged, the rotating column penetrates through the two connecting plates and is rotatably connected with the two connecting plates, and a cam is arranged between the two connecting plates, The rotating column penetrates through the cam and is fixedly connected with the cam;

When working, when the wire is connected to the circuit breaker body through the wiring mechanism, it is only necessary to clamp the wire with a tool and insert it into the wiring barrel, so as to achieve the effect of blind connection, which will greatly improve the work efficiency. During this process, the two copper sheets will be driven away from each other, and the side of the two copper sheets that are close to each other is clamped to the wire, so it can prevent the wire from falling off between the two copper sheets. When it is isolated, it is only necessary to fix the protective cover and the mounting plate together and keep the circuit breaker body in the protective cover. When the protective cover and the mounting plate are fixedly connected together, during this process, the two tabs will It is driven to rotate with the corresponding shaft as the center of the circle and approach each other. When the two tabs and the two slots are flush, the two torsion springs will drive the tabs on the two shafts away from each other. Snap into the corresponding slot, so under the action of the two tabs and the two slots, the shield and the mounting plate will be tightly connected together, and the wires will pass through the holes on the shield during this process. At the same time, through the cooperation of the block and the wire groove, the inner wall of the wire and the wire groove tightly collide with the inner wall of the semicircular limit groove on the block, so that the wire can pass through the protective cover. , and the external air will not pass through the gap between the protective cover and the wire, so that the circuit breaker body can be completely isolated from the outside air.

Preferably, the same rotating shaft is rotatably installed on the top and bottom inner walls of the rotating groove, the rotating shaft passes through the tab and is connected with the tab, and a guide rod is fixedly installed on the top inner wall of the rotating groove, so A torsion spring is set on the guide rod to rotate, and the two ends of the torsion spring are fixedly connected with the rotating shaft and the inner wall of one side of the rotating groove respectively. When the circuit breaker body needs to be isolated from the outside air, only the protective The cover and the mounting plate are fixedly connected together and the circuit breaker body is in the protective cover. When the protective cover and the mounting plate are fixedly connected together, just align the four stoppers with the corresponding wire grooves and place the protective cover. It is closely attached to the mounting plate. During this process, the two tabs will be driven to rotate around the corresponding shaft and approach each other. When the two tabs and the two slots are flush, the The reset elastic force of the torsion spring will drive the tabs on the two shafts away from each other and snap into the corresponding slots. Therefore, under the action of the two tabs and the two slots, the protective cover and the mounting plate will be tightly tightened. When the protective cover and the mounting plate are separated, you only need to press the two tabs in the direction of approaching each other. When the two tabs fall off from the corresponding slots on the protective cover, you can Easily separate the shield from the mounting plate.

Preferably, four outer walls of the rectangular frame are provided with rectangular grooves, and the same sealing ring is fixedly installed in the four rectangular grooves, and the sealing ring extends to the outside of the four rectangular grooves and is slidably connected to the inner wall of the protective cover. At the same time, the rectangular plate is provided with a through hole, the cylinder penetrates through the through hole, and the end of the cylinder away from the rectangular frame is fixedly installed with a limit block, and the side of the rectangular plate and the rectangular frame close to each other is fixedly installed with the same first. A spring, the first spring is slidably sleeved on the cylinder, when the circuit breaker body is isolated from the outside air by the protective cover and the mounting plate that are fixedly connected together, in order to prevent the outside air from passing between the protective cover and the mounting plate When the gap between the two plates is circulating, the rectangular frame is always close to the mounting plate under the action of the four rectangular plates, and the sealing ring and the inner wall of the protective cover are slidably connected together, which can prevent the outside air from passing between the protective cover and the mounting plate. The gap flows into the protective cover, so it can be completely isolated from the external air.

Preferably, the two copper sheets are provided with anti-skid teeth on one side close to each other, the anti-skid teeth on the two copper sheets are arranged in a staggered manner, two sliding holes are formed on the circular plate, and the two pull rods respectively penetrate through the corresponding sliding holes It is slidably connected to the inner wall of the corresponding through hole, and a second spring is slidably sleeved on the two pull rods. The top and bottom ends of the two second springs are fixedly connected to the circular plate and the circular block respectively. When the wiring mechanism and the circuit breaker body are connected together, it is only necessary to clamp the wire with a tool and insert it into the wiring barrel, so as to achieve the effect of blind connection, which will greatly improve the work efficiency. The copper sheets will be driven away from each other, and the side of the two copper sheets that are close to each other is clamped to the wire. At the same time, driven by the two second springs, the circular block always has a thrust close to the circular plate, and the circular block passes through the two The pull rod drives the two copper sheets to approach each other, so that the wire can be prevented from falling off between the two copper sheets, so that the connection strength between the wire and the wire barrel becomes higher.

Preferably, four blocks distributed in a rectangular shape are fixedly installed on the mounting plate, and semicircular limiting grooves are opened at one end of the four blocks away from the mounting plate, and the protective cover is close to the top and the bottom of the circuit breaker body. There are two wire grooves on the inner wall of the bottom. When the wires are connected with the circuit breaker body through the wiring mechanism, and the circuit breaker body needs to be isolated from the outside air by the cooperation of the protective cover and the mounting plate, the wires It will pass through the wire groove on the protective cover, and at the same time, through the cooperation of the block and the wire groove, the inner wall of the wire and wire groove and the inner wall of the semicircular limit groove on the block are tightly in contact with each other. At the same time, the wire can pass through the protective cover, and the external air will not pass through the gap between the protective cover and the wire, so that the circuit breaker body can be completely isolated from the outside air.

Preferably, the two connecting plates are fixedly connected to the circular plate, the inner walls on both sides of the wire barrel are provided with rotating holes, the rotating column and the inner walls of the two rotating holes are rotatably connected together, and the rotating column One end of the cable extends to the outside of the pair of rotating holes and is fixedly installed with an inner hexagonal rotating block. When the wire needs to be removed from the wiring mechanism, it is only necessary to rotate the inner hexagonal rotating block with a tool, and the inner hexagonal rotating block rotates and drives the rotation. The column rotates, the rotating column rotates and drives the cam to rotate. During the rotation of the cam, the circular block is driven away from the circular plate. During the process of the circular block being away from the circular plate, the two copper sheets are driven away from each other through two pull rods. The spacing between the copper sheets keeps getting larger, and since there is no fixation between the two copper sheets, the wires can be easily taken out from the wiring mechanism, which is very convenient.

Compared with the prior art, the beneficial effects of the present invention are:

1. When the circuit breaker body needs to be isolated from the outside air, it is only necessary to fix the protective cover and the mounting plate together and keep the circuit breaker body in the protective cover. When the protective cover and the mounting plate are fixedly connected together, Just align the four stoppers with the corresponding wire grooves and stick the protective cover and the mounting plate together. During this process, the two tabs are inserted into the corresponding Under the action of the tongue and the two card slots, the protective cover and the mounting plate will be tightly connected together, so the circuit breaker body can be completely isolated from the outside air, ensuring that the circuit breaker body can also function normally in harsh environments. Work;

2. When connecting the wire with the circuit breaker body through the wiring mechanism, it is only necessary to clamp the wire with a tool and insert it into the wiring barrel, so as to achieve the effect of blind connection, which will greatly improve the work efficiency. During the process, the side of the two copper sheets that are close to each other is clamped to the wire. When the wire needs to be removed from the wiring mechanism, it is only necessary to use the tool to turn the inner hexagonal rotating block, and the inner hexagonal rotating block rotates and drives the rotating column to rotate. The rotating column rotates and drives the cam to rotate. During the rotation of the cam, the circular block is driven away from the circular plate. During the process of the circular block being away from the circular plate, the two tie rods are used to drive the two copper sheets away from each other. The distance between them keeps getting bigger. Because there is no two copper sheets to fix, the wire can be easily taken out from the wiring mechanism, which is very convenient, so it not only makes the connection between the wire and the circuit breaker body very fast and convenient, And the connection relationship between the wire and the circuit breaker body can always be guaranteed to be firm.

Description of drawings

1 is an exploded view of a high-voltage DC circuit breaker proposed by the present invention;

2 is a partial cross-sectional structural schematic diagram of a middle mounting plate of a high-voltage DC circuit breaker proposed by the present invention;

Fig. 3 is the enlarged structural representation of part A in Fig. 2;

FIG. 4 is a schematic three-dimensional structural diagram of a protective cover in a high-voltage DC circuit breaker proposed by the present invention;

5 is a partial cross-sectional structural schematic diagram of a sealing mechanism in a high-voltage DC circuit breaker proposed by the present invention;

FIG. 6 is a frontal cross-sectional structural schematic diagram of a wiring mechanism in a high-voltage DC circuit breaker proposed by the present invention;

7 is a schematic three-dimensional structural diagram of an opening mechanism in a high-voltage DC circuit breaker proposed by the present invention.

In the figure: 1. Circuit breaker body; 2. Mounting plate; 201, stopper; 202, clamping mechanism; 20201, rotating groove; 20202, tab; 20203, rotating shaft; 20204, guide rod; 20205, torsion spring; 3 , protective cover; 301, wire slot; 302, card slot; 303, sealing mechanism; 30301, rectangular frame; 30302, cylinder; 30303, rectangular plate; 30304, first spring; 30305, sealing ring; 4, wiring mechanism; 401, wire barrel; 402, copper sheet; 403, round plate; 404, round block; 405, pull rod; 406, second spring; 407, opening mechanism; 40701, rotating column; 40702, inner hexagon rotating block; 40703, connection plate; 40704, cam.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Example

1-7, a high-voltage DC circuit breaker is proposed in this embodiment, including a circuit breaker body 1, a mounting plate 2 and a protective cover 3, the circuit breaker body 1 and the mounting plate 2 are fixedly connected together, and the mounting plate 2 is close to One side of the circuit breaker body 1 is provided with a clamping mechanism 202 , the top and bottom of the circuit breaker body 1 are provided with two wiring mechanisms 4 , and the inner walls of both sides of the protective cover 3 are provided with clamping grooves 302 . A sealing mechanism 303 is provided;

The clamping mechanism 202 includes a tab 20202, a rotation slot 20201 is formed on the side of the mounting plate 2 close to the circuit breaker body 1, and the tab 20202 and the inner wall of the rotation slot 20201 are rotatably connected together;

The sealing mechanism 303 includes a rectangular frame 30301. The side of the rectangular frame 30301 away from the circuit breaker body 1 is fixedly installed with four rectangularly distributed cylinders 30302. The four cylinders 30302 are provided with rectangular plates 30303, and the four rectangular plates 30303 are far away from each other. One side of the protective cover 3 is fixedly connected to the inner walls of both sides of the protective cover 3, and the four cylinders 30302 respectively penetrate the corresponding rectangular plates 30303 and are slidably connected with the corresponding rectangular plates 30303;

The wiring mechanism 4 includes a wiring barrel 401, copper sheets 402 are fixedly installed on both inner walls of the wiring barrel 401, and a linkage mechanism is arranged in the wiring barrel 401, and the linkage mechanism is located below the two copper sheets 402;

The linkage mechanism includes two pull rods 405. The tops of the two pull rods 405 are hinged together with the bottoms of the copper sheets 402 corresponding to each other. The plate 403, the two pull rods 405 pass through the circular plate 403 and are slidably connected to the circular plate 403, and an opening mechanism 407 is provided between the circular block 404 and the circular plate 403;

The opening mechanism 407 includes a rotating column 40701, and two connecting plates 40703 are arranged on the rotating column 40701. The rotating column 40701 penetrates the two connecting plates 40703 and is rotatably connected with the two connecting plates 40703. The cam 40704, the rotating column 40701 penetrates the cam 40704 and is fixedly connected with the cam 40704;

When working, when connecting the wire through the wiring mechanism 4 and the circuit breaker body 1, it is only necessary to clamp the wire with a tool and insert it into the wiring barrel 401, so as to achieve the effect of blind connection, which will greatly improve the work. In this process, the two copper sheets 402 will be driven away from each other, and the side of the two copper sheets 402 close to each other is clamped to the wire, so the wire can be prevented from falling off between the two copper sheets 402. When the circuit breaker body 1 isolates the outside air, it is only necessary to firmly connect the protective cover 3 and the mounting plate 2 together and keep the circuit breaker body 1 in the protective cover 3, and connect the protective cover 3 and the mounting plate 2 together. During this process, the two tabs 20202 will be driven to rotate around the corresponding rotating shaft 20203 and approach each other. When the two tabs 20202 and the two slots 302 are flush, the The restoring force of the spring 20205 will drive the tabs 20202 on the two rotating shafts 20203 away from each other and snap into the corresponding slots 302. Therefore, under the action of the two tabs 20202 and the two slots 302, the protective cover 3 and the The mounting plate 2 will be tightly connected together. During this process, the wires will pass through the wire channel 301 on the protective cover 3. The inner wall of 301 is in close contact with the inner wall of the semi-circular limit groove on the stopper 201, so that the wire can pass through the protective cover 3, and the external air will not pass through the gap between the protective cover 3 and the wire, The circuit breaker body 1 can be completely isolated from the outside air.

As a mode of the present invention, the same rotating shaft 20203 is rotatably installed on the top and bottom inner walls of the rotating groove 20201, the rotating shaft 20203 penetrates the tab 20202 and is connected with the tab 20202, and is fixedly installed on the top inner wall of the rotating groove 20201 There is a guide rod 20204, a torsion spring 20205 is set on the guide rod 20204, and the two ends of the torsion spring 20205 are fixedly connected to the rotating shaft 20203 and the inner wall of one side of the rotating groove 20201 respectively. The circuit breaker body 1 needs to be isolated from the outside air. When opening, it is only necessary to connect the protective cover 3 and the mounting plate 2 together and keep the circuit breaker body 1 in the protective cover 3. When the protective cover 3 and the mounting plate 2 are fixedly connected together, only four The stoppers 201 are respectively aligned with the corresponding wire grooves 301 and the protective cover 3 and the mounting plate 2 are closely attached together. During this process, the two tabs 20202 will be driven to rotate around the corresponding rotating shaft 20203 and mutually When the two tabs 20202 and the two slots 302 are flush, under the restoring force of the two torsion springs 20205, the tabs 20202 on the two rotating shafts 20203 will be driven away from each other and inserted into the corresponding slots 302 Therefore, under the action of the two tabs 20202 and the two slots 302, the protective cover 3 and the mounting plate 2 will be tightly connected together. When separating the protective cover 3 and the mounting plate 2, only Press the two tabs 20202 toward each other. When the two tabs 20202 fall off from the corresponding slots 302 on the protective cover 3, the protective cover 3 and the mounting plate 2 can be easily separated.

As an embodiment of the present invention, four rectangular grooves are formed on the outer walls of the rectangular frame 30301, and the same sealing ring 30305 is fixedly installed in the four rectangular grooves. The inner walls are slidably connected together, the rectangular plate 30303 is provided with a through hole, the cylinder 30302 runs through the through hole, and the end of the cylinder 30302 away from the rectangular frame 30301 is fixedly installed with a limit block, and the rectangular plate 30303 and the rectangular frame 30301 are fixed on the side close to each other The same first spring 30304 is installed, and the first spring 30304 is slidably sleeved on the cylinder 30302. When the circuit breaker body 1 is isolated from the outside air through the fixedly connected protective cover 3 and the mounting plate 2, in order to prevent When the outside air circulates through the gap between the protective cover 3 and the mounting plate 2, under the action of the four rectangular plates 30303, the rectangular frame 30301 is always in close contact with the mounting plate 2, and the sealing ring 30305 and the inner wall of the protective cover 3 slide. By being connected together, the external air can be prevented from flowing into the protective cover 3 through the gap between the protective cover 3 and the mounting plate 2, so it can be completely isolated from the external air.

As a mode of the present invention, the two copper sheets 402 are provided with anti-slip teeth on the sides close to each other, the anti-slip teeth on the two copper sheets 402 are arranged in a staggered manner, and the circular plate 403 is provided with two sliding holes, two The pull rods 405 respectively pass through the corresponding sliding holes and are slidably connected to the inner walls of the corresponding through holes. Second springs 406 are slidably sleeved on both pull rods 405. The top and bottom ends of the two second springs 406 are respectively connected to the circular plate. 403 and the round block 404 are fixedly connected together. When the wire is connected to the circuit breaker body 1 through the wiring mechanism 4, it is only necessary to clamp the wire with a tool and insert it into the wiring barrel 401, so as to achieve a blind connection. In this process, the two copper sheets 402 will be driven away from each other, and the side of the two copper sheets 402 that are close to each other is clamped to the wire, and at the same time the two second springs 406 Driven, the circular block 404 always has a thrust close to the circular plate 403, and the circular block 404 drives the two copper sheets 402 to approach each other through the two pull rods 405, so that the wire can be prevented from falling off between the two copper sheets 402, thus making the wire The connection strength with the wire barrel 401 becomes higher.

As a mode of the present invention, four blocks 201 distributed in a rectangular shape are fixedly installed on the mounting plate 2 , and one end of the four blocks 201 away from the mounting plate 2 is provided with a semicircular limit groove, and the protective cover 3 is close to Both the top and bottom inner walls of the circuit breaker body 1 are provided with two wire channels 301 . When the wires are connected to the circuit breaker body 1 through the wiring mechanism 4 , and the protective cover 3 and the mounting plate 2 need to cooperate with each other to connect the wires. When the circuit breaker body 1 is isolated from the outside air, the wire will pass through the wire channel 301 on the protective cover 3, and at the same time, through the cooperation of the stopper 201 and the wire channel 301, the wire and the inner wall of the wire channel 301 are connected. It is in close contact with the inner wall of the semicircular limit slot on the stopper 201, so that the wire can pass through the protective cover 3, and the external air will not pass through the gap between the protective cover 3 and the wire, so that the circuit breaker The main body 1 can be completely isolated from the outside air.

As a mode of the present invention, the two connecting plates 40703 are fixedly connected to the circular plate 403, the inner walls of both sides of the wire barrel 401 are provided with rotating holes, and the rotating column 40701 and the inner walls of the two rotating holes are rotatably connected to each other. At the same time, one end of the rotating column 40701 extends to the outside of the pair of rotating holes and is fixedly installed with the inner hexagonal rotating block 40702. When the wire needs to be removed from the wiring mechanism 4, it is only necessary to use the tool to rotate the inner hexagonal rotating block 40702 , The inner hexagonal rotating block 40702 rotates and drives the rotating column 40701 to rotate, the rotating column 40701 rotates and drives the cam 40704 to rotate, during the rotation of the cam 40704, it will drive the circular block 404 away from the circular plate 403. During the process, the two copper sheets 402 will be driven away from each other by the two tie rods 405. As the distance between the two copper sheets 402 continues to increase, since there is no fixation of the two copper sheets 402, the wires can be easily removed from each other. It is very convenient to take out the wiring mechanism 4.

Working principle, when working, when the wire is connected to the circuit breaker body 1 through the wiring mechanism 4, it is only necessary to clamp the wire with a tool and insert it into the wiring barrel 401, so as to achieve the effect of blind connection, and the large The work efficiency is greatly improved. During this process, the two copper sheets 402 will be driven away from each other, and the side of the two copper sheets 402 that are close to each other is clamped to the wire, so the wire can be prevented from falling off between the two copper sheets 402. , when the circuit breaker body 1 needs to be isolated from the outside air, it is only necessary to fix the protective cover 3 and the mounting plate 2 together and keep the circuit breaker body 1 in the protective cover 3, and fix the protective cover 3 and the mounting plate 2. When connected together, during this process, the two tabs 20202 will be driven to rotate around the corresponding shaft 20203 and approach each other. When the two tabs 20202 and the two slots 302 are flush, the The reset elastic force of the two torsion springs 20205 will drive the tabs 20202 on the two rotating shafts 20203 away from each other and snap into the corresponding slots 302. Therefore, under the action of the two tabs 20202 and the two slots 302, protection against The cover 3 and the mounting plate 2 will be tightly connected together. During this process, the wires will pass through the wire grooves 301 on the protective cover 3. The inner wall of the wire slot 301 is in close contact with the inner wall of the semicircular limit slot on the stopper 201, so that the wire can pass through the protective cover 3, and the external air will not pass between the protective cover 3 and the wire. so that the circuit breaker body 1 can be completely isolated from the outside air.

The above description is only a preferred embodiment of the present invention, but the protection scope of the present invention is not limited to this. The equivalent replacement or change of the inventive concept thereof shall be included within the protection scope of the present invention.

Claims (5)

1. A high-voltage direct-current circuit breaker comprises a circuit breaker body (1), a mounting plate (2) and a protective cover (3), and is characterized in that the circuit breaker body (1) and the mounting plate (2) are fixedly connected together, a clamping mechanism (202) is arranged on one side, close to the circuit breaker body (1), of the mounting plate (2), two wiring mechanisms (4) are arranged at the top and the bottom of the circuit breaker body (1), clamping grooves (302) are formed in the inner walls of the two sides of the protective cover (3), and a sealing mechanism (303) is arranged in the protective cover (3);

the clamping mechanism (202) comprises a clamping tongue (20202), one side of the mounting plate (2), which is close to the circuit breaker body (1), is provided with a rotating groove (20201), and the clamping tongue (20202) is rotatably connected with the inner wall of the rotating groove (20201);

the sealing mechanism (303) comprises a rectangular frame (30301), four cylinders (30302) which are distributed in a rectangular shape are fixedly mounted on one side, away from the breaker body (1), of the rectangular frame (30301), rectangular plates (30303) are arranged on the four cylinders (30302), one sides, away from each other, of the four rectangular plates (30303) are fixedly connected with the inner walls of the two sides of the protective cover (3) respectively, and the four cylinders (30302) penetrate through the corresponding rectangular plates (30303) respectively and are connected with the corresponding rectangular plates (30303) in a sliding mode;

the wiring mechanism (4) comprises a wiring barrel (401), copper sheets (402) are fixedly mounted on the inner walls of two sides of the wiring barrel (401), a linkage mechanism is arranged in the wiring barrel (401), and the linkage mechanism is positioned below the two copper sheets (402);

the linkage mechanism comprises two pull rods (405), the tops of the two pull rods (405) are hinged together with the bottoms of the corresponding copper sheets (402), the bottom ends of the two pull rods (405) are fixedly provided with the same round block (404), a round plate (403) is fixedly arranged in the wiring barrel (401), the two pull rods (405) penetrate through the round plate (403) and are connected with the round plate (403) in a sliding mode, and an opening mechanism (407) is arranged between the round block (404) and the round plate (403);

the opening mechanism (407) comprises a rotating column (40701), two connecting plates (40703) are arranged on the rotating column (40701), the rotating column (40701) penetrates through the two connecting plates (40703) and is rotatably connected with the two connecting plates (40703), a cam (40704) is arranged between the two connecting plates (40703), and the rotating column (40701) penetrates through the cam (40704) and is fixedly connected with the cam (40704);

the anti-skidding teeth are arranged on one side, close to each other, of each of the two copper sheets (402), the anti-skidding teeth on the two copper sheets (402) are arranged in a staggered mode, two sliding holes are formed in the circular plate (403), the two pull rods (405) penetrate through the corresponding sliding holes respectively and are connected with the corresponding inner walls of the through holes in a sliding mode, the two pull rods (405) are sleeved with the second springs (406) in a sliding mode, and the top ends and the bottom ends of the two second springs (406) are fixedly connected with the circular plate (403) and the round block (404) respectively.

2. The high-voltage direct current circuit breaker according to claim 1, characterized in that the same rotating shaft (20203) is rotatably installed on the top and bottom inner walls of the rotating groove (20201), the rotating shaft (20203) penetrates through the latch (20202) and is connected with the latch (20202), a guide rod (20204) is fixedly installed on the top inner wall of the rotating groove (20201), a torsion spring (20205) is rotatably sleeved on the guide rod (20204), and two ends of the torsion spring (20205) are respectively fixedly connected with the rotating shaft (20203) and one side inner wall of the rotating groove (20201).

3. The high-voltage direct current circuit breaker according to claim 1, characterized in that four outer walls of the rectangular frame (30301) are provided with rectangular grooves, the same sealing ring (30305) is fixedly installed in the four rectangular grooves, the sealing ring (30305) extends out of the four rectangular grooves and is connected with the inner wall of the protective cover (3) in a sliding manner, a through hole is formed in the rectangular plate (30303), the cylinder (30302) penetrates through the through hole, a limiting block is fixedly installed at one end, far away from the rectangular frame (30301), of the cylinder (30302), one side, close to each other, of the rectangular plate (30303) and one side, close to the rectangular frame (30301), of the same first spring (30304) is fixedly installed, and the first spring (30304) is sleeved on the cylinder (30302) in a sliding manner.

4. The high-voltage direct current circuit breaker according to claim 1, characterized in that four stoppers (201) are fixedly mounted on the mounting plate (2) and distributed in a rectangular shape, semicircular limiting grooves are formed in ends of the four stoppers (201) away from the mounting plate (2), and two through wire grooves (301) are formed in inner walls of the top and the bottom of the protective cover (3) close to the circuit breaker body (1).

5. The HVDC breaker of claim 1, wherein the two connection plates (40703) are fixedly connected to the circular plate (403), the wiring barrel (401) has rotation holes on the inner walls of both sides, the rotation post (40701) is rotatably connected to the inner walls of the two rotation holes, and an inner hexagonal rotation block (40702) is fixedly mounted at one end of the rotation post (40701).

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