A fast operating mechanism for a circuit breaker and method of use

Abstract

The application discloses a quick-moving structure of a circuit breaker and a use method thereof, and relates to the technical field of circuit breakers, which comprises a circuit breaker body, an electromagnetic release is internally installed in the circuit breaker body, an operating handle, a connecting rod and a connecting sheet are rotationally connected to the inner side of the circuit breaker body respectively, the operating handle and the connecting rod are transmissionally connected, a first movable rod is installed at the bottom of the connecting rod, a thermal release is installed at the inner side of the circuit breaker body, a circuit breaking area division assembly is arranged on the circuit breaker body, the circuit breaking area division assembly comprises a second movable rod which is installed at the bottom of the connecting rod, the circuit breaking area division assembly is arranged, the first indicating handle and the second indicating handle are arranged, when short circuit or overload causes the circuit breaker body to trip, different reasons can make the first indicating handle and the second indicating handle rotate, and users can intuitively and quickly observe the tripping reasons outside the circuit breaker body.

Description

Technical Field

[0001] This invention relates to the field of circuit breaker technology, and in particular to a quick-acting structure for a circuit breaker and its method of use. Background Technology

[0002] A circuit breaker is an electrical device used to protect circuit safety. It automatically disconnects the circuit when abnormal conditions occur (such as overload, short circuit, undervoltage, etc.), preventing damage to electrical equipment and lines due to overcurrent or overvoltage, and even preventing safety accidents such as fires. When the current in the circuit exceeds the rated current of the circuit breaker for a certain period, the internal thermal element of the circuit breaker heats up and deforms due to the thermal effect of the current, pushing the tripping mechanism to trip the circuit breaker and disconnect the circuit. When a short circuit occurs, the current in the circuit increases sharply, generating a strong electromagnetic force. The electromagnetic trip unit in the circuit breaker will act quickly under the action of the electromagnetic force, driving the tripping mechanism to trip the circuit breaker, thereby quickly disconnecting the circuit and preventing serious damage to equipment and lines caused by the short-circuit current.

[0003] Traditional circuit breakers with quick-acting structures typically disconnect the circuit only through mechanical tripping, but cannot actively display the fault type. Users need to rely on professional personnel for detection or experience to judge, and there is no storage or recording function. After each trip, manual recording or reliance on external systems is required, which affects users' analysis of fault frequency and patterns. Therefore, a quick-acting structure for circuit breakers and its usage method are proposed. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies that use mechanical tripping to cut off circuits but cannot actively display fault types, requiring users to rely on professional personnel for detection or experience-based judgment, and lacking storage or recording functions. After each trip, manual recording or reliance on external systems is required, which affects users' ability to analyze fault frequency and patterns. Therefore, this invention proposes a fast-acting structure for circuit breakers and its usage method.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A quick-acting structure for a circuit breaker includes a circuit breaker body. An electromagnetic trip unit is installed inside the circuit breaker body. An operating handle, a connecting rod, and a connecting piece are rotatably connected to the inner side of the circuit breaker body. The operating handle and the connecting rod are connected by a transmission mechanism. A first movable rod is installed at the bottom of the connecting rod. A thermal trip unit is installed inside the circuit breaker body. A circuit breaker differentiation assembly is provided on the circuit breaker body. The circuit breaker differentiation assembly includes a second movable rod installed at the bottom of the connecting rod, a first indicating handle and a second indicating handle rotatably connected to the inner side of the circuit breaker body, and a transmission unit located inside the circuit breaker body. After a short circuit, when the electromagnetic trip unit moves downward, it pushes the connecting rod downward, causing the second movable rod to move downward. The downward movement of the second movable rod, through the transmission unit, drives the first rotating rod and the first... When an indicator handle rotates, thermal tripping occurs during overload, causing the second rotating rod and the second indicator handle to rotate via a transmission unit. A recording component is provided on the side of the circuit breaker body. The recording component includes a push plate mounted on the outer side of both the first and second indicator handles, two rotating wheels rotatably connected to the inner side of the circuit breaker body, multiple indicator plates mounted on the outer side of the rotating wheels, and multiple pressure blocks movably connected to the outer side of the push plate. The pressure blocks are arc-shaped pressure surfaces, and their curvature matches the curvature of the push plate's movement trajectory. When the second rotating rod and the first indicator handle rotate, the push plate presses the pressure blocks and drives the rotating wheels to rotate. By observing the numbers corresponding to the indicator plates on the rotating wheels, the previous short circuit or overload situation can be observed, thus realizing the recording of tripping history information.

[0006] The above technical solution further includes: The transmission unit includes a first rotating block rotatably connected to the side of the second movable rod. A first telescopic rod is installed on the side of the first rotating block away from the second movable rod. The end of the first telescopic rod away from the first rotating block is fixedly connected to the first rotating rod. When the second movable rod moves down, the first rotating rod is driven to rotate by the rotation of the first rotating block and the extension of the first telescopic rod. The first telescopic rod is a rigid telescopic rod that can be axially extended and retracted, and its extension stroke matches the downward stroke of the second movable rod.

[0007] The transmission unit also includes a second rotating block rotatably connected to the side of the thermally released mechanism. A second telescopic rod is installed on the side of the second rotating block. The end of the second telescopic rod away from the second rotating block is fixedly connected to the second rotating rod. The rotation of the second rotating block and the extension of the second telescopic rod drive the second rotating rod to rotate.

[0008] Two support plates are installed on the side of the circuit breaker body. A square groove is opened on the inner side of the support plate. A fourth telescopic rod is installed inside the square groove. A movable block is installed at the end of the fourth telescopic rod. The movable block is slidably disposed inside the square groove. A pull rod is installed on the side of the movable block near the fourth telescopic rod. The pull rod is movably connected to the support plate. The reset spring force of the fourth telescopic rod is greater than the sliding friction between the movable block and the square groove. The movable block automatically resets and limits the indicator handle. The first and second indicator handles after rotation are limited by the movable block.

[0009] The number of movable blocks is two, and the two movable blocks are respectively located on the sides of the first indicator handle and the second indicator handle. The cross-section of the movable block is trapezoidal. The two movable blocks are respectively located on the movement trajectory of the first indicator handle and the second indicator handle. When the first indicator handle and the second indicator handle are rotated, they can squeeze the inclined surface of the movable block.

[0010] The inner sides of both the first and second indicator handles are provided with sliding grooves, and the push plate is slidably disposed inside the sliding grooves.

[0011] Multiple third telescopic rods are installed on the outer side of the rotating wheel, and the end of the third telescopic rod away from the rotating wheel is fixedly connected to the pressure block.

[0012] The pressure block is positioned on the movement trajectory of the push plate. When the first and second indicator handles are rotated, they can drive the push plate to push the pressure block.

[0013] The outer sides of the multiple indicator panels are engraved with numbers in sequence.

[0014] A method for using a quick-acting structure of a circuit breaker includes the following steps: Step 1: After a short circuit occurs in the line, the electromagnetic trip unit moves down through magnetic force. The movement of the electromagnetic trip unit pushes the connecting rod down and drives the second movable rod down. The movement of the second movable rod drives the first rotating rod and the first indicator handle to rotate. The rotation of the first indicator handle indicates that a short circuit has caused the circuit breaker to trip. Step 2: When overloaded, the thermal trip temperature will increase and bend. When the thermal trip bends, the end moves down, which then drives the second rotating rod and the second indicator handle to rotate. The rotation of the second indicator handle indicates that the overload has caused the circuit breaker to trip. Step 3: When the first and second indicator handles are rotated, they drive the push plate to squeeze the pressure block. After the pressure block is squeezed, the rotating wheel rotates. After the rotating wheel rotates, the changes in the indicator plate are observed to record the short circuit and overload.

[0015] The present invention has the following beneficial effects: 1. In this invention, by setting a circuit breaker differentiation component and by setting a first indicator handle and a second indicator handle, when a short circuit or overload causes the circuit breaker body to trip, different reasons will cause the corresponding first indicator handle 12 and second indicator handle 16 to rotate. Users can intuitively and quickly observe the tripping reason on the outside of the circuit breaker body without the need for further investigation by professional personnel, which makes it convenient for users to understand the situation in a timely manner and take corresponding measures.

[0016] 2. In this invention, when the first and second indicator handles are rotated, they can drive the push plate to push the pressure block, thereby causing the rotating wheel to rotate. By observing the numbers corresponding to the indicator plates on the rotating wheel, the previous short circuit or overload situation can be observed, thus realizing the recording of tripping history information, which makes it convenient for users to understand the past working status and fault frequency of the circuit breaker. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall internal structure of a quick-acting structure of a circuit breaker proposed in this invention. Figure 2 This is a schematic diagram of the overall side cross-sectional structure of the present invention; Figure 3 This is a schematic diagram of the overall structure of the present invention; Figure 4 for Figure 1 Enlarged schematic diagram of the structure at point A in the middle; Figure 5 for Figure 2 Enlarged schematic diagram of the structure at point B; Figure 6 for Figure 5 Enlarged schematic diagram of the structure at point C; Figure 7 for Figure 5 Enlarged schematic diagram of the structure at point D.

[0018] In the diagram: 1. Circuit breaker body; 2. Electromagnetic trip unit; 3. Operating handle; 4. Connecting rod; 5. Connecting piece; 6. Thermal trip; 7. First movable rod; 8. Second movable rod; 9. First rotating block; 10. First telescopic rod; 11. First rotating rod; 12. First indicating handle; 13. Second rotating block; 14. Second telescopic rod; 15. Second rotating rod; 16. Second indicating handle; 17. Support plate; 18. Square slot; 19. Fourth telescopic rod; 20. Movable block; 21. Pull rod; 22. Sliding groove; 23. Push plate; 24. Rotating wheel; 25. Indicator plate; 26. Third telescopic rod; 27. Pressure block. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Example 1 like Figure 1 - Figure 7 As shown, the present invention proposes a quick-acting structure for a circuit breaker, comprising a circuit breaker body 1, an electromagnetic trip unit 2 installed inside the circuit breaker body 1, an operating handle 3, a connecting rod 4, and a connecting piece 5 rotatably connected to the inner side of the circuit breaker body 1, a transmission connection between the operating handle 3 and the connecting rod 4, a first movable rod 7 installed at the bottom of the connecting rod 4, a thermal trip unit 6 installed inside the circuit breaker body 1, and a circuit breaking differentiation assembly provided on the circuit breaker body 1. The circuit breaking differentiation assembly includes a second movable rod 8 installed at the bottom of the connecting rod 4, a first indicating handle 12 and a second indicating handle 16 rotatably connected to the inner side of the circuit breaker body 1, and a transmission unit provided inside the circuit breaker body 1. When a short circuit occurs, the electromagnetic trip unit 2 moves downward, pushing the connecting rod 4 downward, which in turn drives the second movable rod 8 downward. The downward movement of the second movable rod 8 drives the first movable rod 7 through the transmission unit. A rotating rod 11 and a first indicating handle 12 rotate. In case of overload, the thermal trip 6 bends and drives the second rotating rod 15 and the second indicating handle 16 to rotate via the transmission unit. Users can intuitively and quickly observe the cause of the tripping from the outside of the circuit breaker body without further investigation by professionals, making it convenient for users to understand the situation in a timely manner and take appropriate measures. A recording component is provided on the side of the circuit breaker body 1. The recording component includes a push plate 23 installed on the outside of both the first indicating handle 12 and the second indicating handle 16, two rotating wheels 24 rotatably connected to the inside of the circuit breaker body 1, multiple indicating plates 25 installed on the outside of the rotating wheels 24, and multiple pressure blocks 27 movably connected to the outside of the push plate 23. The pressure blocks 27 are arc-shaped pressure surfaces, and their arc curvature is adapted to the curvature of the movement trajectory of the push plate 23. The rotating wheels 24 rotate 30° each time. Corresponding to an indicator plate 25, a single push of the push plate 23 can drive the rotating wheel 24 to rotate 30 degrees, achieving accurate recording of a single trip. When the second rotating rod 15 and the first indicator handle 12 rotate, they press the pressure block 27 through the push plate 23 and drive the rotating wheel 24 to rotate. By observing the numbers corresponding to the indicator plate on the rotating wheel, the previous short circuit or overload situation can be observed, thus realizing the recording of trip history information.

[0021] The transmission unit includes a first rotating block 9 rotatably connected to the side of the second movable rod 8. A first telescopic rod 10 is installed on the side of the first rotating block 9 away from the second movable rod 8. The end of the first telescopic rod 10 away from the first rotating block 9 is fixedly connected to the first rotating rod 11. When the second movable rod 8 moves down, the first rotating rod 11 is driven to rotate by the rotation of the first rotating block 9 and the extension of the first telescopic rod 10. The extension stroke of the first telescopic rod 10 is 5-10mm, which is adapted to the downward stroke of the electromagnetic trip device 2.

[0022] The transmission unit also includes a second rotating block 13 rotatably connected to the side of the thermal release 6. A second telescopic rod 14 is installed on the side of the second rotating block 13. The end of the second telescopic rod 14 away from the second rotating block 13 is fixedly connected to the second rotating rod 15. The rotation of the second rotating block 13 and the stretching of the second telescopic rod 14 drive the second rotating rod 15 to rotate. The reset spring force of the fourth telescopic rod 19 is 2-5N, which ensures the limiting effect and does not affect the normal rotation of the indicator handle.

[0023] Two support plates 17 are installed on the side of the circuit breaker body 1. A square groove 18 is opened on the inner side of the support plate 17. A fourth telescopic rod 19 is installed inside the square groove 18. A movable block 20 is installed at the end of the fourth telescopic rod 19. The movable block 20 is slidably disposed inside the square groove 18. A pull rod 21 is installed on the side of the movable block 20 near the fourth telescopic rod 19. The pull rod 21 is movably connected to the support plate 17. The movable block 20 limits the rotation of the first indicator handle 12 and the second indicator handle 16. The reset spring force of the fourth telescopic rod 19 is 2-5N to ensure the limiting effect and not affect the normal rotation of the indicator handle.

[0024] There are two movable blocks 20. The two movable blocks 20 are located on the sides of the first indicator handle 12 and the second indicator handle 16, respectively. The cross-section of the movable block 20 is trapezoidal. The two movable blocks 20 are located on the movement trajectory of the first indicator handle 12 and the second indicator handle 16, respectively. When the first indicator handle 12 and the second indicator handle 16 rotate, they can squeeze the inclined surface of the movable block 20.

[0025] In this embodiment, when the circuit breaker body 1 is needed, if a short circuit occurs, the electromagnetic trip unit 2 will be subjected to increased magnetic force and move downwards. As the electromagnetic trip unit 2 moves downwards, it presses against the connecting rod 4. The connecting rod 4, after being pressed by the electromagnetic trip unit 2, rotates and presses against the connecting piece 5, causing the connecting piece 5 to separate from the line. The rotation of the connecting rod 4 also drives the operating handle 3 to rotate, indicating that the circuit breaker body 1 has tripped. When the electromagnetic trip unit 2 moves downwards, it can drive the second movable rod 8 to move downwards. The second movable rod 8, when moving downwards, drives the first rotating rod 11 to rotate through the rotation of the first rotating block 9 and the extension of the first telescopic rod 10. The rotation of the first rotating rod 11 drives the first indicating handle 12 to rotate. If an overload occurs, the thermal trip unit 6, sensing a high temperature, will bend downwards, simultaneously driving the first movable rod 7 to move downwards. The downward movement of the first movable rod 7 drives the connecting rod 4 to rotate and press against the line. Connecting piece 5 separates the connecting piece 5 from the line. Then, the rotation of the second rotating block 13 and the extension of the second telescopic rod 14 drive the second rotating rod 15 to rotate. When the second rotating rod 15 rotates, it drives the second indicating handle 16 to rotate. When the first indicating handle 12 and the second indicating handle 16 rotate, they can squeeze the inclined surface of the movable block 20. After being squeezed, the movable block 20 retracts into the inner side of the square groove 18. At this time, the fourth telescopic rod 19 retracts. When the protruding parts of the first indicating handle 12 and the second indicating handle 16 move to the other side of the movable block 20, the retracted fourth telescopic rod 19 drives the movable block 20 to reset and limits the rotation of the first indicating handle 12 and the second indicating handle 16. The user can intuitively and quickly observe the cause of the trip by observing the rotation of the first indicating handle 12 or the second indicating handle 16 from the outside of the circuit breaker body 1.

[0026] Example 2 like Figure 1 - Figure 7 As shown, based on Embodiment 1, both the inner sides of the first indicator handle 12 and the second indicator handle 16 are provided with sliding grooves 22, and the push plate 23 is slidably disposed inside the sliding grooves 22.

[0027] Multiple third telescopic rods 26 are installed on the outer side of the rotating wheel 24, and the end of the third telescopic rod 26 away from the rotating wheel 24 is fixedly connected to the pressure block 27.

[0028] The pressure block 27 is positioned on the movement trajectory of the push plate 23. When the first indicator handle 12 and the second indicator handle 16 are rotated, they can drive the push plate 23 to push the pressure block 27.

[0029] The outer sides of multiple indicator plates 25 are engraved with numbers in sequence.

[0030] In this embodiment, when the first indicator handle 12 and the second indicator handle 16 are rotated, the push plate 23 can be driven to push the pressure block 27, and at the same time, the rotating wheel 24 is driven to rotate. At this time, the pressure block 27 next to the pushed pressure block 27 is squeezed, and the third telescopic rod 26 at the corresponding position of the squeezed pressure block 27 retracts to ensure the normal rotation of the rotating wheel 24. By observing the corresponding number on the indicator plate 25 of the rotating wheel 24, the previous short circuit or overload situation can be observed.

[0031] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A quick-acting structure for a circuit breaker, comprising a circuit breaker body (1), characterized in that, An electromagnetic trip unit (2) is installed inside the circuit breaker body (1). An operating handle (3), a connecting rod (4), and a connecting piece (5) are rotatably connected to the inner side of the circuit breaker body (1). The operating handle (3) and the connecting rod (4) are connected by transmission. A first movable rod (7) is installed at the bottom of the connecting rod (4). A thermal trip unit (6) is installed on the inner side of the circuit breaker body (1). A circuit breaker differentiation component is provided on the circuit breaker body (1). The circuit breaker differentiation component includes a second movable rod (8) installed at the bottom of the connecting rod (4), a first indicator handle (12) and a second indicator handle (16) rotatably connected to the inner side of the circuit breaker body (1), and a transmission unit provided on the inner side of the circuit breaker body (1). When the electromagnetic trip unit (2) moves down after a short circuit, it pushes the connecting rod (4) down, which in turn drives the second movable rod (8) down. The second movable rod (8) moves down through the transmission unit. The first rotating rod (11) and the first indicator handle (12) rotate. When overloaded, the thermal trip (6) bends and drives the second rotating rod (15) and the second indicator handle (16) to rotate through the transmission unit. A recording component is provided on the side of the circuit breaker body (1). The recording component includes a push plate (23) installed on the outside of the first indicator handle (12) and the second indicator handle (16), two rotating wheels (24) rotatably connected to the inside of the circuit breaker body (1), multiple indicator plates (25) installed on the outside of the rotating wheels (24), and multiple pressure blocks (27) movably connected to the outside of the push plate (23). The pressure block (27) is an arc-shaped pressure surface, and its arc curvature is adapted to the curvature of the motion trajectory of the push plate (23). When the second rotating rod (15) and the first indicator handle (12) rotate, the push plate (23) squeezes the pressure block (27) and drives the rotating wheel (24) to rotate.

2. The quick-acting structure of a circuit breaker according to claim 1, characterized in that, The transmission unit includes a first rotating block (9) rotatably connected to the side of the second movable rod (8). A first telescopic rod (10) is installed on the side of the first rotating block (9) away from the second movable rod (8). The end of the first telescopic rod (10) away from the first rotating block (9) is fixedly connected to the first rotating rod (11). The first telescopic rod (10) is a rigid telescopic rod that can be axially extended and retracted, and its extension stroke matches the downward stroke of the second movable rod (8).

3. The quick-acting structure of a circuit breaker according to claim 1, characterized in that, The transmission unit also includes a second rotating block (13) rotatably connected to the side of the thermal release (6), and a second telescopic rod (14) is installed on the side of the second rotating block (13). The end of the second telescopic rod (14) away from the second rotating block (13) is fixedly connected to the second rotating rod (15).

4. The quick-acting structure of a circuit breaker according to claim 1, characterized in that, Two support plates (17) are installed on the side of the circuit breaker body (1). A square groove (18) is opened on the inner side of the support plate (17). A fourth telescopic rod (19) is installed inside the square groove (18). A movable block (20) is installed at the end of the fourth telescopic rod (19). The movable block (20) is slidably disposed inside the square groove (18). A pull rod (21) is installed on the side of the movable block (20) near the fourth telescopic rod (19). The pull rod (21) is movably connected to the support plate (17). The reset spring force of the fourth telescopic rod (19) is greater than the sliding friction between the movable block (20) and the square groove (18). The movable block (20) automatically resets and limits the indicator handle.

5. The quick-acting structure of a circuit breaker according to claim 4, characterized in that, There are two movable blocks (20). The two movable blocks (20) are located on the sides of the first indicator handle (12) and the second indicator handle (16), respectively. The cross-section of the movable block (20) is trapezoidal. The two movable blocks (20) are located on the movement trajectory of the first indicator handle (12) and the second indicator handle (16), respectively.

6. The quick-acting structure of a circuit breaker according to claim 1, characterized in that, The inner sides of the first indicator handle (12) and the second indicator handle (16) are provided with sliding grooves (22), and the push plate (23) is slidably disposed on the inner side of the sliding grooves (22).

7. The quick-acting structure of a circuit breaker according to claim 1, characterized in that, Multiple third telescopic rods (26) are installed on the outside of the rotating wheel (24), and the end of the third telescopic rod (26) away from the rotating wheel (24) is fixedly connected to the pressure block (27).

8. The quick-acting structure of a circuit breaker according to claim 7, characterized in that, The pressure block (27) is positioned on the trajectory of the push plate (23).

9. The quick-acting structure of a circuit breaker according to claim 1, characterized in that, The outer sides of multiple indicator plates (25) are engraved with numbers in sequence.

10. A method of using a quick-acting structure of a circuit breaker, comprising the quick-acting structure of a circuit breaker as described in claim 1, characterized in that, Includes the following steps: Step 1: After a short circuit occurs in the line, the electromagnetic trip unit (2) is moved down by magnetic force. The electromagnetic trip unit (2) moves down and pushes the connecting rod (4) to move down and drives the second movable rod (8) to move down. The second movable rod (8) moves down and drives the first rotating rod (11) and the first indicator handle (12) to rotate. The rotation of the first indicator handle (12) indicates that a short circuit has caused the trip. Step 2: When overloaded, the temperature of the thermal trip (6) will increase and bend. When the thermal trip (6) bends, the end moves down, which then drives the second rotating rod (15) and the second indicator handle (16) to rotate. The rotation of the second indicator handle (16) indicates that the overload has caused the circuit breaker to trip. Step 3: When the first indicator handle (12) and the second indicator handle (16) rotate, they drive the push plate (23) to squeeze the pressure block (27). After the pressure block (27) is squeezed, the rotating wheel (24) rotates. After the rotating wheel (24) rotates, the changes in the indicator plate (25) are observed to record the short circuit and overload.

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