Arc fault detection circuit breaker

Abstract

The utility model discloses an arc fault detection circuit breaker, which relates to the technical field of circuit breakers, and comprises a multidirectional adjustable base and a circuit breaker main body, the center of the front end of the multidirectional adjustable base is fixedly connected with a butt joint ball socket, and the rear side of the circuit breaker main body is fixedly connected with a connecting bottom plate. A butt joint hemisphere is fixedly connected to the center of the rear side of the connecting bottom plate, the butt joint hemisphere abuts against a groove in the front side of the butt joint ball socket, connecting screw rods are fixedly connected to the four corners of the front side of the multi-direction adjustable base, and inclined groove holes are formed in the positions, corresponding to the connecting screw rods, of the four corners of the connecting bottom plate; the front end of the connecting screw penetrates through the inclined groove hole and then is in threaded connection with a connecting nut, the angle of the connecting bottom plate is adjusted by screwing the connecting nut and matching with spherical contact of the butt joint ball socket and the butt joint hemisphere, and therefore the fixing angle of the circuit breaker body is adjusted, levelness deviation caused by building structure errors can be compensated, and the service life of the circuit breaker body is prolonged. And the installation flexibility and adaptability are higher.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker technology, specifically to an arc fault detection circuit breaker. Background Technology

[0002] An arc fault circuit interrupter (AFCI) is a circuit protection device primarily used to prevent fires caused by arc faults. An arc fault occurs when current flows abnormally in a circuit, usually due to the breakdown of an insulator by voltage, causing current to flow in a non-conductive medium and creating an arc. When an arc fault occurs, the current intensity is relatively low, below the setting value of overcurrent protection devices widely installed in power systems, especially in low-voltage distribution. Installing an arc fault circuit interrupter (AFCI) at the end of the distribution line is a timely measure to detect the arc and disconnect the circuit, effectively reducing losses caused by the arc.

[0003] Existing arc fault circuit breakers generally adopt a split-type fireproof structure, and their shells are mostly made of a single fire-resistant material. The detection module mounting base adopts a rigid connection, which cannot compensate for the level deviation caused by the building structure error during on-site installation. Therefore, we propose an arc fault detection circuit breaker. Utility Model Content

[0004] The purpose of this utility model is to solve the problem that existing arc fault circuit breakers generally adopt a split fireproof structure, whose shells are mostly made of a single fire-resistant material, and the detection module mounting base adopts a rigid connection, which cannot compensate for the level deviation caused by the building structure error during on-site installation. This utility model provides an arc fault detection circuit breaker.

[0005] To achieve the above objectives, this utility model specifically adopts the following technical solution:

[0006] An arc fault detection circuit breaker includes a multi-directional adjustable base and a circuit breaker body. A mating ball socket is fixedly connected to the front center of the multi-directional adjustable base. A connecting base plate is fixedly connected to the rear side of the circuit breaker body, and a mating hemisphere is fixedly connected to the rear center of the connecting base plate. The mating hemisphere abuts against the groove on the front side of the mating ball socket. Connecting screws are fixedly connected to the four corners of the front side of the multi-directional adjustable base. The four corners of the connecting base plate have oblique slot holes corresponding to the connecting screws. The front end of the connecting screw passes through the oblique slot hole and is threaded with a connecting nut.

[0007] Furthermore, a support spring is sleeved on the outer wall of the connecting screw between the multi-directional adjustable base and the connecting base plate, and the two ends of the support spring abut against the multi-directional adjustable base and the connecting base plate respectively.

[0008] Furthermore, the docking socket is a polyetheretherketone wear-resistant bushing, and the docking hemisphere is a stainless steel hemisphere. The groove of the docking socket is provided with multiple oil storage grooves at equal intervals, and the oil storage grooves are filled with grease.

[0009] Furthermore, a universal bubble level is fixedly connected to the bottom of the circuit breaker body.

[0010] Furthermore, the main body of the circuit breaker consists of, from the outside to the inside, a stainless steel outer shell, a basalt fiber braided layer, an expanded graphite flame-retardant interlayer, and a silicon nitride ceramic liner.

[0011] Furthermore, the circuit breaker body has perforated areas on both sides, and the perforated areas are an array of diamond-shaped holes arranged in an alternating pattern.

[0012] Furthermore, the inner layer of the connecting base plate has multiple heat dissipation fins distributed radially.

[0013] The beneficial effects of this utility model are as follows:

[0014] 1. This utility model features a multi-directional adjustable base and a connecting base plate. The multi-directional adjustable base is pre-fixed to the wall using expansion bolts. The circuit breaker body is fixed to the center of the front of the connecting base plate. The circuit breaker body can connect with the connecting base plate and the connecting hemisphere on the back of the multi-directional adjustable base via the connecting base plate and the connecting ball socket on the front of the multi-directional adjustable base. Multiple connecting screws and oblique slots are provided. The connecting screws pass through the oblique slots and are fixed by connecting nuts. By tightening the connecting nuts, the angle of the connecting base plate can be adjusted through the spherical contact between the connecting ball socket and the connecting hemisphere, thereby adjusting the fixed angle of the circuit breaker body. This can compensate for the horizontal deviation caused by building structure errors and has higher installation flexibility and adaptability.

[0015] 2. The present invention features a support spring that provides elastic support for the multi-directional adjustable base and connecting base plate, making the connecting base plate more stable after it is fixed. When subjected to external impact or vibration, the support spring can buffer the impact force, thereby improving the stability and safety of the equipment.

[0016] 3. This utility model utilizes a stainless steel outer shell, a basalt fiber braided layer, an expanded graphite flame-retardant interlayer, and a silicon nitride ceramic liner. The stainless steel outer shell provides rigid protection, while the basalt fiber braided layer forms a heat insulation barrier inside the stainless steel outer shell. The expanded graphite flame-retardant interlayer expands under high temperatures when a fire breaks out inside or outside the circuit breaker body, sealing the gaps in the circuit breaker body's outer shell and effectively preventing the spread of fire, thus improving the circuit breaker's fire resistance. The silicon nitride ceramic liner has excellent high-temperature resistance and insulation properties, can withstand high-temperature electric arcs, prevent the shell from melting through, and protect the electronic components inside the circuit breaker body from damage caused by high temperatures and electric arcs, thereby improving the circuit breaker's safety and service life. Attached Figure Description

[0017] Figure 1 This is a perspective view of the present invention;

[0018] Figure 2 This is a side sectional view of the present invention;

[0019] Figure 3 This is a rear-view sectional view of the back of the connecting base plate of this utility model;

[0020] Figure 4 This is a cross-sectional structural diagram of the outer shell of the circuit breaker body of this utility model.

[0021] Reference numerals: 1. Multi-directional adjustable base; 2. Connecting base plate; 3. Circuit breaker body; 4. Connecting ball socket; 5. Connecting hemisphere; 6. Connecting screw; 7. Slanted slot hole; 8. Support spring; 9. Connecting nut; 10. Universal bubble level; 11. Perforated area; 12. Heat dissipation fins; 13. Stainless steel outer shell; 14. Basalt fiber braided layer; 15. Expanded graphite flame-retardant interlayer; 16. Silicon nitride ceramic liner. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0023] Please see Figures 1-4This utility model provides an arc fault detection circuit breaker, including a multi-directional adjustable base 1 and a circuit breaker body 3. A docking ball socket 4 is fixedly connected to the front center of the multi-directional adjustable base 1. A connecting base plate 2 is fixedly connected to the rear side of the circuit breaker body 3, and a docking hemisphere 5 is fixedly connected to the rear center of the connecting base plate 2. The docking hemisphere 5 abuts against the groove on the front side of the docking ball socket 4. Connecting screws 6 are fixedly connected to the four corners of the front side of the multi-directional adjustable base 1. The four corners of the connecting base plate 2 are provided with oblique slot holes 7 corresponding to the connecting screws 6. The front end of the connecting screw 6 passes through the oblique slot hole 7 and is threaded with a connecting nut 9.

[0024] In this embodiment, preferably, a support spring 8 is sleeved between the outer wall of the connecting screw 6 and the multi-directional adjustable base 1 and the connecting base plate 2, and the two ends of the support spring 8 abut against the multi-directional adjustable base 1 and the connecting base plate 2 respectively; through the support spring 8, the support spring 8 can provide elastic support for the multi-directional adjustable base 1 and the connecting base plate 2, making the connecting base plate 2 more stable after it is fixed, and can buffer the impact force when subjected to external impact or vibration, thereby improving the stability and safety of the equipment.

[0025] In this embodiment, preferably, the docking socket 4 is a polyetheretherketone (PEEK) wear-resistant bushing, and the docking hemisphere 5 is a stainless steel hemisphere. Multiple oil storage grooves are evenly spaced within the groove of the docking socket 4, and these grooves are filled with grease. The PEEK wear-resistant bushing used in the docking socket 4 has excellent wear resistance and self-lubricating properties, while the stainless steel hemisphere 5 has good strength and corrosion resistance. The fit between the docking socket 4 and the docking hemisphere 5 improves the ease and stability of installing the circuit breaker body 3. Simultaneously, the grease filling the oil storage grooves reduces the frictional resistance between the docking socket 4 and the docking hemisphere 5, allowing the circuit breaker body 3 to easily achieve multi-directional adjustment, thus improving installation flexibility and efficiency.

[0026] In this embodiment, preferably, a universal bubble level 10 is fixedly connected to the bottom of the circuit breaker body 3; the universal bubble level 10 can assist the installer in judging the levelness of the circuit breaker body 3, thereby ensuring that the circuit breaker body 3 remains level during installation, which greatly improves the accuracy and precision of installation.

[0027] In this embodiment, preferably, the outer casing of the circuit breaker body 3 consists of a stainless steel outer casing 13, a basalt fiber braided layer 14, an expanded graphite flame-retardant interlayer 15, and a silicon nitride ceramic liner 16, arranged from the outside to the inside. The stainless steel outer casing 13 serves as rigid protection; the basalt fiber braided layer 14 forms a heat insulation barrier inside the stainless steel outer casing 13; the expanded graphite flame-retardant interlayer 15 expands under high temperature when a fire breaks out inside or outside the circuit breaker body 3, sealing the gaps in the outer casing of the circuit breaker body 3, effectively preventing the spread of fire and improving the fire resistance of the circuit breaker; and the silicon nitride ceramic liner 16 has excellent high-temperature resistance and insulation properties, can withstand high-temperature arcs, prevent the casing from melting through, and protect the electronic components inside the circuit breaker body 3 from damage caused by high temperature and arcs, thereby improving the safety and service life of the circuit breaker.

[0028] In this embodiment, preferably, the circuit breaker body 3 is provided with perforated areas 11 on both sides, and the perforated areas 11 are an array of multiple diamond-shaped through holes arranged in an alternating pattern. By providing perforated areas 11, the heat dissipation area of ​​the circuit breaker body 3 is increased. At the same time, the alternating distribution of diamond-shaped through holes can effectively disperse wind force, improve heat dissipation efficiency, ensure that the circuit breaker body 3 can operate stably in high-temperature environments, and further extend the service life of the equipment.

[0029] In this embodiment, preferably, the inner layer of the connecting base plate 2 has multiple heat dissipation fins 12 arranged radially. Through the heat dissipation fins 12, the heat dissipation fins 12 can increase the contact area between the connecting base plate 2 and the air, improve the heat dissipation efficiency, and quickly dissipate the heat generated by the circuit breaker body 3, ensuring that the circuit breaker body 3 will not be damaged due to overheating during long-term operation, and further improving the reliability and stability of the equipment.

[0030] The working principle and usage process of this utility model are as follows: In use, the multi-directional adjustable base 1 and the connecting base plate 2 are provided. The multi-directional adjustable base 1 is pre-fixed to the wall with expansion bolts. The circuit breaker body 3 is fixed to the center of the front of the connecting base plate 2. The circuit breaker body 3 can be connected to the connecting ball socket 4 on the front of the multi-directional adjustable base 1 through the connecting base plate 2 and the connecting hemisphere 5 on the back side of the multi-directional adjustable base 1. Through the provided multiple connecting screws 6 and oblique slot holes 7, the connecting screws 6 pass through the oblique slot holes 7 and are fixed by the connecting nuts 9. By tightening the connecting nuts 9, the angle of the connecting base plate 2 can be adjusted by the spherical contact between the connecting ball socket 4 and the connecting hemisphere 5, thereby adjusting the fixed angle of the circuit breaker body 3. This can compensate for the horizontal deviation caused by the building structure error and has higher installation flexibility and adaptability.

[0031] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An arc fault detection circuit breaker, characterized in that: The circuit breaker includes a multi-directional adjustable base (1) and a circuit breaker body (3). The front center of the multi-directional adjustable base (1) is fixedly connected to a ball socket (4). The rear side of the circuit breaker body (3) is fixedly connected to a connecting base plate (2), and the rear center of the connecting base plate (2) is fixedly connected to a ball hemisphere (5). The ball hemisphere (5) abuts against the groove on the front side of the ball socket (4). The four corners of the front side of the multi-directional adjustable base (1) are fixedly connected to connecting screws (6). The four corners of the connecting base plate (2) are provided with inclined slot holes (7) corresponding to the connecting screws (6). The front end of the connecting screw (6) passes through the inclined slot hole (7) and is threaded with a connecting nut (9).

2. The arc fault detection circuit breaker according to claim 1, characterized in that: The outer wall of the connecting screw (6) is fitted with a support spring (8) between the multi-directional adjustable base (1) and the connecting base plate (2), and the two ends of the support spring (8) abut against the multi-directional adjustable base (1) and the connecting base plate (2) respectively.

3. The arc fault detection circuit breaker according to claim 1, characterized in that: The docking ball socket (4) is a polyether ether ketone wear-resistant bushing, and the docking hemisphere (5) is a stainless steel hemisphere. Multiple oil storage grooves are equally spaced in the groove of the docking ball socket (4), and the oil storage grooves are filled with grease.

4. The arc fault detection circuit breaker according to claim 1, characterized in that: A universal bubble level (10) is fixedly connected to the bottom of the circuit breaker body (3).

5. The arc fault detection circuit breaker according to claim 1, characterized in that: The circuit breaker body (3) consists of a stainless steel outer shell (13), a basalt fiber braided layer (14), an expanded graphite flame-retardant interlayer (15), and a silicon nitride ceramic liner (16) from the outside to the inside.

6. The arc fault detection circuit breaker according to claim 5, characterized in that: The circuit breaker body (3) has perforated areas (11) on both sides, and the perforated areas (11) are a diamond-shaped array of multiple diamond-shaped through holes arranged in an alternating pattern.

7. The arc fault detection circuit breaker according to claim 1, characterized in that: The inner layer of the connecting base plate (2) has multiple heat dissipation fins (12) arranged radially.

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