Circuit breaker for electric power engineering

Abstract

The invention relates to the technical field of circuit breakers, in particular to a circuit breaker for electric power engineering, which comprises a shell, a first elastic conducting strip, a second elastic conducting strip and the like, a fixing structure is arranged on the lower portion of the shell, and a disconnecting structure is arranged in the shell. A first elastic conducting strip is connected in the shell; the first elastic conducting strip is fixedly connected with a second elastic conducting strip, and the first elastic conducting strip is connected with a disconnection structure in the shell. When a power line or equipment breaks down, a shifting ring rotates clockwise, a pull rope pulls a movable cylinder, a pressing rod, a limiting frame and a first elastic conducting strip to move rightwards, meanwhile, the limiting frame moves away from the upper portion of a push plate, and under the action of a spring in a compressed state, the push plate moves upwards to push an input wire and push the input wire out of a shell; and remote from the first elastic conductive sheet and the second elastic conductive sheet, electric arcs are prevented from being generated between the input wire and the first elastic conductive sheet and the second elastic conductive sheet in high-current applications.

Description

Technical Field

[0001] The present application relates to the technical field of circuit breakers, and in particular to a circuit breaker for electric power engineering. Background Art

[0002] Circuit breakers play a vital role in power systems, and their main functions include control and protection: circuit breakers can control the on and off of lines. When the system is operating normally, circuit breakers can connect or disconnect lines according to instructions, thereby adjusting the operating status of the lines; when a power line or equipment fails, the circuit breaker can quickly cut off the faulty circuit to prevent the fault from expanding and ensure that the fault-free part continues to operate; currently, the disconnection structure of the circuit breaker is designed internally, which leads to a potential safety issue: even if the circuit breaker has been disconnected, the input wires still remain inside it. In high-current application scenarios, arcs may still be generated at the connection between the input wires and the circuit breaker, posing a safety hazard; in addition, in a complex and multi-operator environment, due to the visibility and accessibility of the circuit breaker switch, other people may inadvertently flip the circuit breaker switch due to misoperation, causing the problem circuit that should have been isolated to be connected again, which undoubtedly increases the risk of safety accidents. Summary of the invention

[0003] In order to overcome the disadvantage that even if the circuit breaker has been disconnected, the input wire still remains inside it, and in high current application scenarios, an arc may still be generated at the connection between the input wire and the circuit breaker, thus constituting a safety hazard, the present invention provides a circuit breaker for power engineering.

[0004] The technical scheme of the present invention is: a circuit breaker for power engineering, comprising a housing, a first elastic conductive sheet, a second elastic conductive sheet, a toggle ring, a toggle block, a clamping structure and a fixing structure; a fixing structure is arranged at the lower part of the housing, and a disconnection structure is arranged inside the housing; a first elastic conductive sheet is connected inside the housing; a second elastic conductive sheet is fixedly connected to the first elastic conductive sheet, and the first elastic conductive sheet is connected to the disconnection structure inside the housing; a toggle ring is rotatably connected to the right part of the housing, and the toggle ring is connected to the disconnection structure inside the housing; a toggle block is fixedly connected to the toggle ring; and further comprising There are springs, push plates, movable cylinders, pressure rods, limit frames and pulling units; a spring is fixedly connected inside the shell, and an insulating layer is covered on the outer surface of the spring; a push plate is fixedly connected to the upper side of the spring, and two first movable grooves are opened on the upper part of the shell, and the push plate slides in the two first movable grooves; a movable cylinder is connected to the upper part of the shell in a damping sliding manner; a pressure rod is connected inside the movable cylinder; the pressure rod is fixedly connected to the first elastic conductive sheet; a limit frame is fixedly connected to the left part of the movable cylinder; a pulling unit is connected to the movable cylinder, and the pulling unit is used to pull the movable cylinder; the push plate, movable cylinder, pressure rod and limit frame are all made of plastic.

[0005] As a preferred technical solution of the present invention, the pulling unit includes a pull rope, a transmission wheel and an insertion rod; two pull ropes are fixedly connected to the right side of the movable cylinder; an insertion rod is respectively fixed to the lower end of the two pull ropes; two second movable grooves are opened on the right side of the shell, and each pull rope is respectively located in a second movable groove; a socket is opened on the toggle ring; the two insertion rods are both inserted in the socket; two transmission wheels are rotatably connected to the shell; the two pull ropes are respectively in contact with a transmission wheel.

[0006] As a preferred technical solution of the present invention, a metal convex strip is arranged on the left side of the first elastic conductive sheet.

[0007] As a preferred technical solution of the present invention, both the front and rear of the jack are beveled.

[0008] As a preferred technical solution of the present invention, each of the two insertion rods is covered with a rubber sleeve.

[0009] As a preferred technical solution of the present invention, a guide ring is fixedly connected to the upper side and the lower side of the shell respectively.

[0010] As a preferred technical solution of the present invention, two folding baffles are fixedly connected between the push plate and the shell, and the two folding baffles are respectively located in a first movable groove.

[0011] As a preferred technical solution of the present invention, a connecting plate is fixedly connected to the right portion of the pressure rod.

[0012] As a preferred technical solution of the present invention, the pressure rod is screwed to the movable cylinder; a groove is provided on the right side of the pressure rod.

[0013] As a preferred technical solution of the present invention, a third elastic conductive sheet is also included; a third elastic conductive sheet is fixedly connected to the front side and the rear side of the first elastic conductive sheet respectively.

[0014] Beneficial effects: 1. When a power line or equipment fails, the disconnect structure in the shell can quickly sense and disconnect the electrical connection between the input wire and the output wire. When disconnecting, the toggle ring will rotate clockwise, and the pull rope will be pulled by the plug rod. The pull rope drives the transmission wheel to rotate, and pulls the movable cylinder, the pressure rod, the limit frame and the first elastic conductive sheet to move to the right, so that the first elastic conductive sheet no longer presses the input wire on the second elastic conductive sheet to fix it. At the same time, the limit frame moves away from the top of the push plate. Under the action of the spring in a compressed state, the push plate moves upward to push the input wire, and pushes the input wire out of the shell, away from the first elastic conductive sheet and the second elastic conductive sheet; in this way, arcs are prevented from being generated between the input wire and the first elastic conductive sheet and the second elastic conductive sheet in high current applications; and in a complex multi-person operation environment, even if other people mistakenly operate the toggle block upward, the circuit will not be connected, thereby avoiding safety accidents.

[0015] 2. When inspecting the circuit, it is necessary to manually push the dial block and the dial ring downward to disconnect the circuit. In order to prevent the input wire from being ejected, the plug rod should be manually pulled out of the socket before pushing the dial block and the dial ring downward. In this way, when pushing the dial block and the dial ring downward, the dial ring will not pull the pull rope, thus preventing the input wire from being ejected and the need to reinstall the input wire.

[0016] 3. After the input wire is pressed onto the second elastic conductive sheet through the first elastic conductive sheet, the pressure rod is manually screwed with a screwdriver to move the pressure rod to the left in the movable cylinder. The pressure rod will drive the first elastic conductive sheet to move further to the left, so that the input wire is tightly pressed onto the second elastic conductive sheet, which is more secure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the circuit breaker for power engineering of the present invention from a first perspective;

[0018] Figure 2 A schematic diagram of the three-dimensional structure of the circuit breaker for power engineering of the present invention from a second viewing angle;

[0019] Figure 3 It is a schematic diagram of the three-dimensional structure of the housing, push plate, toggle ring, toggle block, rubber sleeve, guide ring, folding baffle and connecting plate combination of the circuit breaker for power engineering of the present invention;

[0020] Figure 4 A cross-sectional view of a housing of a circuit breaker for power engineering of the present invention;

[0021] Figure 5 It is a schematic diagram of the combined three-dimensional structure of the movable cylinder, the pressure rod and the limit frame of the circuit breaker for power engineering of the present invention;

[0022] Figure 6 It is a schematic diagram of the three-dimensional structure of the housing, the first elastic conductive sheet, the second elastic conductive sheet, the spring, the push plate, the movable cylinder and the pressure rod of the circuit breaker for power engineering of the present invention, wherein the housing is cross-sectionally processed;

[0023] Figure 7 The present invention is a schematic diagram of the combined three-dimensional structure of a toggle ring, a plunger and a rubber sleeve of a circuit breaker for power engineering.

[0024] Marked in the figure: 1-housing, 1a-first movable groove, 1b-second movable groove, 2-first elastic conductive sheet, 3-second elastic conductive sheet, 4-spring, 5-push plate, 6-movable cylinder, 7-pressure rod, 8-limiting frame, 9-sliding ring, 9a-jack, 10-sliding block, 11-pull rope, 12-transmission wheel, 13-insertion rod, 14-rubber sleeve, 15-guide ring, 16-folding baffle, 17-connecting plate, 18-third elastic conductive sheet, 19-clamping structure, 20-fixed structure. DETAILED DESCRIPTION

[0025] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments, but is not intended to limit the present invention.

[0026] Example 1

[0027] A circuit breaker for electric power engineering, such as Figure 1-7 As shown, it includes a shell 1, a first elastic conductive sheet 2, a second elastic conductive sheet 3, a toggle ring 9, a toggle block 10, a clamping structure 19 and a fixing structure 20; a fixing structure 20 is provided at the lower part of the shell 1 for fixing the output wire, and a disconnection structure is provided inside the shell 1. When the current is too large, the disconnection structure automatically disconnects the connection between the input wire and the output wire; the first elastic conductive sheet 2 is connected inside the shell 1; the second elastic conductive sheet 3 is welded to the first elastic conductive sheet 2, and the first elastic conductive sheet 2 is connected to the disconnection structure inside the shell 1; the right part of the shell 1 is rotatably connected to the toggle ring 9, and the toggle ring 9 is connected to the disconnection structure inside the shell 1; the toggle block 10 is fixed to the toggle ring 9;

[0028] It also includes a spring 4, a push plate 5, a movable cylinder 6, a pressure rod 7, a limit frame 8 and a pulling unit; a spring 4 is fixedly connected to the shell 1, and an insulating layer is provided on the outer surface of the spring 4 to prevent arcing between the second elastic conductive sheet 3 and the outer surface of the spring 4; a push plate 5 is fixedly connected to the upper side of the spring 4, and two first movable grooves 1a are provided on the upper part of the shell 1, and the push plate 5 slides in the two first movable grooves 1a; a movable cylinder 6 is connected to the upper part of the shell 1 in a damping sliding manner; a pressure rod 7 is connected to the movable cylinder 6; the pressure rod 7 is fixedly connected to the first elastic conductive sheet 2; a limit frame 8 is fixedly connected to the left part of the movable cylinder 6, and an oblique angle is provided on the left part of the limit frame 8 to facilitate movement to the top of the push plate 5; a pulling unit is connected to the movable cylinder 6, and the pulling unit is used to pull the movable cylinder 6; the push plate 5, the movable cylinder 6, the pressure rod 7 and the limit frame 8 are all made of plastic.

[0029] The pulling unit includes a pull rope 11, a transmission wheel 12 and an insertion rod 13; two pull ropes 11 are fixedly connected to the right side of the movable cylinder 6; the lower ends of the two pull ropes 11 are respectively fixedly connected to an insertion rod 13; two second movable grooves 1b are opened on the right part of the shell 1, and each pull rope 11 is respectively located in a second movable groove 1b; a plug hole 9a is opened on the toggle ring 9; the two insertion rods 13 are both inserted in the plug hole 9a; two transmission wheels 12 are rotatably connected to the shell 1; the two pull ropes 11 are respectively in contact with a transmission wheel 12.

[0030] In order to increase the friction force with the wire, a metal convex strip is provided on the left side of the first elastic conductive sheet 2 .

[0031] In order to facilitate the insertion of the two insertion rods 13 into the insertion hole 9a, the front and rear parts of the insertion hole 9a are both beveled.

[0032] In order to facilitate manual pulling of the insertion rod 13, a rubber sleeve 14 is sleeved on each of the two insertion rods 13 to increase friction.

[0033] In order to facilitate the insertion of the wires into the housing 1 , a guide ring 15 is fixedly connected to the upper side and the lower side of the housing 1 .

[0034] In order to prevent dust from entering the housing 1 through the first movable groove 1a and contacting the second elastic conductive sheet 3 to affect current conduction, two folding baffles 16 are fixedly connected between the push plate 5 and the housing 1. The two folding baffles 16 are respectively located in one of the first movable grooves 1a.

[0035] In order to facilitate pushing the pressure rod 7 , a connecting plate 17 is fixedly connected to the right part of the pressure rod 7 .

[0036] When in use, the circuit breaker is clamped at a designated position through the clamping structure 19 on the left side of the housing 1, and then the input wire and the output wire are installed in the housing 1; when installing the output wire: the output wire is fixed and installed through the output wire fixing structure 20 at the lower part of the housing 1; when installing the input wire: the push plate 5 is pushed down manually with one hand, the push plate 5 moves down to compress the spring 4, and then the input wire is passed through the guide hole of the guide ring 15, and then inserted between the first elastic conductive sheet 2 and the second elastic conductive sheet 3, as shown in FIG. Figure 6 As shown, the other hand is then used to push the movable cylinder 6, the pressure rod 7 and the limit frame 8 to move to the left through the connecting plate 17, so that the limit frame 8 moves to the top of the push plate 5 to limit the push plate 5 from moving upward. Under the elastic force of the spring 4, the push plate 5 will apply an upward thrust to the limit frame 8, and the limit frame 8 will transmit the thrust to the movable cylinder 6, thereby increasing the friction between the movable cylinder 6 and the shell 1 to prevent the movable cylinder 6 from sliding back to the right easily; when the pressure rod 7 moves, it will also drive the first elastic conductive sheet 2 to move to the left, so that the first elastic conductive sheet 2 presses the input wire on the second elastic conductive sheet 3, and the input wire is pressed and fixed by the first elastic conductive sheet 2 and the second elastic conductive sheet 3; after installation, the input wire and the output wire are electrically connected through the first elastic conductive sheet 2, the second elastic conductive sheet 3 and the disconnection structure inside the shell 1, so that the conductive operation can be carried out normally; then the two plug rods 13 are inserted into the jack 9a, as shown Figure 7 shown.

[0037] When the shift block 10 is located at the upper part, Figure 3As shown, the input wire and the output wire are normally electrically connected. When a power line or device fails, the disconnection structure in the housing 1 can quickly sense and disconnect the electrical connection between the input wire and the output wire. When disconnecting, the disconnection structure drives the toggle ring 9 and the toggle block 10 to rotate clockwise, based on the view from the front to the back, so that the toggle block 10 moves downward; when the toggle ring 9 rotates clockwise, the pull rope 11 is pulled by the insertion rod 13, and the pull rope 11 drives the transmission wheel 12 to rotate through friction. The transmission wheel 12 plays a guiding role, which is convenient for the pull rope 11 to pull the movable cylinder 6, the pressure rod 7, the limit frame 8 and the first elastic conductive sheet 2 to the right The first elastic conductive sheet 2 moves so that the input wire is no longer pressed on the second elastic conductive sheet 3 to fix it, and the limit frame 8 is removed from above the push plate 5. Under the action of the spring 4 in the compressed state, the push plate 5 moves upward to push the input wire, and pushes the input wire out of the housing 1, away from the first elastic conductive sheet 2 and the second elastic conductive sheet 3; in this way, arcs are prevented from being generated between the input wire and the first elastic conductive sheet 2 and the second elastic conductive sheet 3 in high-current applications; and in a complex multi-person operation environment, even if other people mistakenly operate the dial block 10 upward, the circuit will not be connected, avoiding safety accidents.

[0038] When the circuit is to be inspected, the user needs to manually push the dial block 10 and the dial ring 9 downward to disconnect the circuit. In order to prevent the input wire from being ejected, the plug rod 13 is manually pulled out from the socket 9a before pushing the dial block 10 and the dial ring 9 downward. In this way, when the dial block 10 and the dial ring 9 are pushed downward, the dial ring 9 will not pull the pull rope 11, thereby preventing the input wire from being ejected and avoiding the need to reinstall the input wire.

[0039] Example 2

[0040] On the basis of Example 1, Figure 4-6 As shown, the pressure rod 7 is screwed to the movable cylinder 6; a groove is provided on the right side of the pressure rod 7 for a screwdriver to screw.

[0041] In order to fix the input wire more securely, after the input wire is pressed onto the second elastic conductive sheet 3 through the first elastic conductive sheet 2, the pressure rod 7 is manually screwed with a screwdriver to move the pressure rod 7 to the left in the movable tube 6. The pressure rod 7 will drive the first elastic conductive sheet 2 to move further to the left, so that the input wire is tightly pressed onto the second elastic conductive sheet 3, making it more secure.

[0042] Example 3

[0043] On the basis of Example 2, Figure 4 As shown, a third elastic conductive sheet 18 is also included; a third elastic conductive sheet 18 is welded to the front side and the rear side of the first elastic conductive sheet 2 respectively.

[0044] After the input wire is pressed onto the second elastic conductive sheet 3 through the first elastic conductive sheet 2, the first elastic conductive sheet 2 contacts the right side of the input wire, and the second elastic conductive sheet 3 contacts the left side of the input wire. Only the left and right sides of the input wire are conductive, and the wire efficiency is low; therefore, a third elastic conductive sheet 18 is welded on the front and rear sides of the first elastic conductive sheet 2 respectively. After the input wire is pressed onto the second elastic conductive sheet 3 through the first elastic conductive sheet 2, the two third elastic conductive sheets 18 contact the front and rear sides of the input wire. In this way, the current of the input wire can not only be conducted through its left and right sides, but also be shunted from the front and rear sides at the same time, thereby significantly improving the efficiency and stability of current transmission.

[0045] Those skilled in the art should understand that the above embodiments do not limit the present invention in any form, and any technical solutions obtained by equivalent replacement or equivalent transformation shall fall within the protection scope of the present invention.

Claims

1. A circuit breaker for power engineering, comprising a housing (1), a first elastic conductive sheet (2), a second elastic conductive sheet (3), a toggle ring (9), a toggle block (10), a clamping structure (19) and a fixing structure (20); the fixing structure (20) is arranged at the lower part of the housing (1), and a disconnection structure is arranged inside the housing (1); the first elastic conductive sheet (2) is connected inside the housing (1); the first elastic conductive sheet (2) is fixedly connected to the second elastic conductive sheet (3), and the first elastic conductive sheet (2) is connected to the disconnection structure inside the housing (1); the right part of the housing (1) is rotatably connected to a toggle ring (9), and the toggle ring (9) is connected to the disconnection structure inside the housing (1); the toggle ring (9) is fixedly connected to the toggle block (10); the characteristics are: The invention also comprises a spring (4), a push plate (5), a movable cylinder (6), a pressure rod (7), a limit frame (8) and a pulling unit; the spring (4) is fixedly connected inside the shell (1), and the outer surface of the spring (4) is covered with an insulating layer; the push plate (5) is fixedly connected to the upper side of the spring (4), and two first movable grooves (1a) are opened on the upper part of the shell (1), and the push plate (5) slides in the two first movable grooves (1a); the upper part of the shell (1) is connected to the movable cylinder (6) in a damping sliding manner; the movable cylinder (6) is connected with a pressure rod (7); the pressure rod (7) is fixedly connected to the first elastic conductive sheet (2); the left part of the movable cylinder (6) is fixedly connected to the limit frame (8); the movable cylinder (6) is connected with a pulling unit, and the pulling unit is used to pull the movable cylinder (6); the push plate (5), the movable cylinder (6), the pressure rod (7) and the limit frame (8) are all made of plastic.

2. A circuit breaker for electric power engineering according to claim 1, characterized in that: The pulling unit comprises a pull rope (11), a transmission wheel (12) and an insertion rod (13); two pull ropes (11) are fixedly connected to the right side of the movable cylinder (6); the lower ends of the two pull ropes (11) are respectively fixedly connected to an insertion rod (13); two second movable grooves (1b) are opened on the right side of the shell (1), and each pull rope (11) is respectively located in a second movable groove (1b); a plug hole (9a) is opened on the toggle ring (9); the two insertion rods (13) are both inserted in the plug hole (9a); two transmission wheels (12) are rotatably connected to the shell (1); the two pull ropes (11) are respectively in contact with a transmission wheel (12).

3. A circuit breaker for electric power engineering according to claim 1, characterized in that: A metal convex strip is arranged on the left side of the first elastic conductive sheet (2).

4. A circuit breaker for electric power engineering according to claim 2, characterized in that: The front and rear of the insertion hole (9a) are both provided with bevels.

5. A circuit breaker for electric power engineering according to claim 2, characterized in that: A rubber sleeve (14) is sleeved on each of the two insertion rods (13).

6. A circuit breaker for electric power engineering according to claim 2, characterized in that: A guide ring (15) is fixedly connected to the upper side and the lower side of the housing (1) respectively.

7. A circuit breaker for electric power engineering according to claim 2, characterized in that: Two folding baffles (16) are fixedly connected between the push plate (5) and the housing (1), and the two folding baffles (16) are respectively located in a first movable groove (1a).

8. A circuit breaker for electric power engineering according to claim 2, characterized in that: The right part of the pressure rod (7) is fixedly connected with a connecting plate (17).

9. A circuit breaker for electric power engineering according to claim 2, characterized in that: The pressure rod (7) is screwed to the movable cylinder (6); a groove is formed on the right side of the pressure rod (7).

10. A circuit breaker for electric power engineering according to any one of claims 1 to 9, characterized in that: It also comprises a third elastic conductive sheet (18); a third elastic conductive sheet (18) is fixedly connected to the front side and the rear side of the first elastic conductive sheet (2) respectively.

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