Arc fault circuit breaker with external environment interference resistance function

Abstract

The invention relates to the related technical field of arc fault circuit breakers, in particular to an arc fault circuit breaker with an external environment interference resisting function, which comprises a shielding box, and a buffer device is arranged on the bottom surface of the outer wall of the shielding box. According to the arc fault circuit breaker with the external environment interference resistance function, through the arrangement of a buffer device and a protection device, when the shielding box is impacted by external force, a connecting plate transmits impact force to a telescopic rod, a buffer block slides in a buffer groove, a compression buffer spring absorbs the impact force, a shock pad and a bottom plate act synergistically, and a base supports and disperses the residual impact force; when the temperature of internal elements is high or the environment temperature is too high, a motor drives heat dissipation blades to rotate to discharge heat, a dustproof plate blocks dust, a limiting block is clamped into a limiting hole to fix the dustproof plate when a bolt is screwed into a threaded hole, a baffle prevents foreign matter from falling into the dustproof plate, and a protective shell protects the motor. The protection device dissipates heat and prevents dust and foreign matters, and a good operation environment is provided for equipment.

Description

Technical Field

[0001] The present invention relates to the technical field related to arc fault circuit breakers, and in particular to an arc fault circuit breaker with a function of resisting external environmental interference. Background Art

[0002] Arc fault circuit breakers mainly realize their protection function by detecting arc faults in circuits. When arc faults occur in circuits, circuit breakers can quickly cut off circuits to prevent dangerous situations such as fires caused by arcs. In modern society, electromagnetic interference generated by various electronic equipment and electrical systems is becoming increasingly serious. Outdoors or in some special environments, electrical equipment may face harsh climatic conditions such as high temperature, low temperature, humidity, and corrosion. In some industrial sites, electrical equipment may be affected by mechanical vibration and impact. In order to ensure the safety of electrical systems, adapt to complex external environments, improve system reliability and stability, and meet the requirements of regulations and standards, there is a special need for an arc fault circuit breaker with the function of resisting external environmental interference.

[0003] However, existing arc fault circuit breakers, when installed in places prone to vibration, such as factory workshops, construction sites, etc., may be affected by external vibrations. However, existing products usually lack effective shock-absorbing designs, which may cause internal components to loosen, shift or even be damaged under the action of vibrations, affecting the normal operation of the circuit breaker. At the same time, long-term high-load operation of the circuit breaker will generate heat, which will increase the temperature of the equipment in hot weather. Long-term exposure to high temperatures will not only reduce the performance and life of the electronic components inside the circuit breaker, but may also cause malfunctions or failures, affecting the stability and safety of the entire electrical system. Summary of the invention

[0004] The purpose of the present invention is to provide an arc fault circuit breaker with an anti-external environmental interference function to solve the problem of an existing arc fault circuit breaker with an anti-external environmental interference function proposed in the above background technology. However, when the existing arc fault circuit breaker is installed in some places prone to vibration, such as factory workshops, construction sites, etc., the circuit breaker may be affected by external vibration. However, existing products usually lack effective shock absorption design, which may cause internal components to loosen, shift or even be damaged under the action of vibration, affecting the normal operation of the circuit breaker. At the same time, long-term high-load operation of the circuit breaker will generate heat, and in high temperature weather, the temperature of the equipment will increase. Long-term high temperature state will not only reduce the performance and life of the electronic components inside the circuit breaker, but may also cause malfunction or failure, affecting the stability and safety of the entire electrical system.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an arc fault circuit breaker with an anti-interference function of the external environment, comprising a shielding box, a box door is rotatably connected to the surface of the shielding box, a warning sign is arranged on the outer surface of the box door, a dehumidification port is opened on the outer bottom of the box door, a moisture-proof layer is arranged on the inner wall surface of the shielding box, a bracket is fixedly connected to the inner wall surface of the shielding box, a circuit breaker is connected to the surface of the bracket, a filter is connected in series to one side surface of the circuit breaker, a dehumidifier is installed on the inner bottom surface of the shielding box, a protective device is arranged on the inner surface of the shielding box, and a buffer device is arranged on the outer bottom surface of the shielding box;

[0006] The buffer device includes a buffer box, a support rod, a telescopic rod, a connecting plate, a shock-absorbing pad, a bottom plate, a fixing bolt, a locking ring, a buffer groove, a slide groove, a telescopic tube, a buffer spring, a buffer rod, a buffer block, a slider and a base. The outer bottom surface of the shielding box is slidably connected with the buffer box, the inner middle bottom surface of the buffer box is fixedly connected with the support rod, the inner wall surface of the support rod is slidably connected with the telescopic rod, the top surface of the telescopic rod is fixedly connected with the connecting plate, the top surface of the connecting plate is fixedly connected to the bottom middle surface of the shielding box, the inner bottom surface of the buffer box is connected with the shock-absorbing pad, and the upper surface of the shock-absorbing pad is fixedly connected A bottom plate is provided, both ends of the bottom plate and the shock-absorbing pad are penetrated by fixing bolts, the outer wall surface of the fixing bolt is rotatably connected with a locking ring, the upper surface of the bottom plate is fixedly connected with a buffer groove, sliding grooves are provided on both sides of the inner wall of the buffer groove, the bottom surface of the inner wall of the buffer groove is fixedly connected with a telescopic tube, the top surface of the telescopic tube is fixedly connected with a buffer spring, the inner wall surface of the telescopic tube is slidably connected with a buffer rod, the inner wall of the buffer groove is slidably connected with a buffer block, the outer ends of the buffer block are fixedly connected with sliders, the bottom surface of the buffer box is fixedly connected with a base, and the top of the buffer rod is fixedly connected to the inner top of the buffer block.

[0007] Preferably, the moisture-proof layer is arranged on each surface inside the shielding box, and the surface of the moisture-proof layer is evenly sprayed with moisture-proof paint.

[0008] Preferably, the circuit breakers and filters are arranged in multiple groups on the surface of the bracket, and the circuit breakers and filters are slidably connected to the bracket.

[0009] Preferably, the dehumidification ports are provided in multiple groups on the surface of the cabinet door, and the positions of the dehumidification ports correspond to the positions of the dehumidifiers.

[0010] Preferably, the protective device includes a vent, a dustproof plate, a threaded hole, a bolt, a shrinkage hole, a telescopic spring, a limit plate, a limit block, a limit hole, a protective shell, a motor, a rotating shaft, a heat dissipation blade and a baffle. A vent is provided on the top of the shielding box, the top surface of the inner wall of the shielding box is threadedly connected to the dustproof plate, the top surface of the inner wall of the shielding box and the surface of the dustproof plate are both provided with threaded holes, the inner wall surface of the threaded hole is threadedly connected with a bolt, shrinkage holes are provided on the inner sides of both ends of the bolt, one end surface of the inner wall of the shrinkage hole is fixedly connected with a telescopic spring, the other end of the telescopic spring is fixedly connected to the limit plate, the other end surface of the limit plate is fixedly connected to the limit block, limit holes are provided on both sides of the bottom end of the threaded hole, the top surface of the shielding box is fixedly connected with a protective shell, the inner surface of the protective shell is fixedly connected with a motor, one end surface of the motor is fixedly connected with a rotating shaft, the outer wall surface of the rotating shaft is fixedly connected with heat dissipation blades, the bottom end surface of the rotating shaft is rotatably connected with a baffle, and the baffle is fixedly connected to the top of the inner wall of the shielding box.

[0011] Preferably, the ventilation holes are provided in a plurality of groups on the top of the shielding box, and the positions of the dustproof plates correspond to the positions of the ventilation holes.

[0012] Preferably, the dustproof plate is fixedly connected to the top of the inner wall of the shielding box through bolts and threaded holes, and multiple groups of bolts are arranged on the surface of the dustproof plate.

[0013] Preferably, the limit plate cooperates with the limit block through a telescopic spring to form a telescopic structure, the position of the limit block corresponds to the position of the limit hole, and the outer wall size of the limit block matches the inner wall size of the limit hole.

[0014] Preferably, the inner wall size of the buffer box matches the outer wall size of the shielding box, and the inner wall size of the slide groove matches the outer wall size of the slide block.

[0015] Preferably, the buffer blocks are provided in multiple groups at the bottom of the shielding box and are symmetrically distributed at the four corners of the shielding box with respect to the central axis of the shielding box, and the bases are provided in multiple groups on the bottom surface of the buffer box.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: the arc fault circuit breaker with the function of resisting external environmental interference, through the setting of the buffer device and the protective device, through the setting of the buffer device, when the shielding box is impacted by external force, the connecting plate will first transfer the impact force to the telescopic rod, and the telescopic rod will slide in the support rod to play a preliminary buffering role. At the same time, after the bottom middle surface of the shielding box transfers the force to the connecting plate, the connecting plate will be pressed down. At this time, the buffer block is subjected to pressure from above and slides downward in the buffer groove. The sliders at the two ends of the outer side of the buffer block slide in the slide groove to ensure the stability of the buffer block movement and buffer When the punch slides downward, it squeezes the buffer rod, causing it to shrink into the telescopic tube. The buffer spring in the telescopic tube is compressed, absorbing and buffering the impact force through its elastic deformation, and the shock-absorbing pad and bottom plate at the bottom of the buffer box also work together. The shock-absorbing pad can further absorb the impact force and reduce the transmission of vibration. The fixing bolt and locking ring ensure the connection stability of the shock-absorbing pad and the bottom plate to prevent loosening during long-term use. The base supports the entire buffer device and can also disperse the remaining impact force to the installation plane, thereby effectively protecting the shielding box from the impact of external forces and ensuring the shielding box. Normal use of the shielding box and safe and stable operation of internal equipment. When the internal components generate a lot of temperature or the ambient temperature is too high, the motor starts and drives the rotating shaft to rotate, thereby rotating the heat dissipation blades. The rotation of the heat dissipation blades generates airflow to discharge the heat inside the shielding box through the vents to achieve heat dissipation of the equipment in the shielding box. During the heat dissipation process, the dustproof plate prevents dust from entering the shielding box. When the dustproof plate needs to be installed or removed, screw the bolt into the threaded hole. During the process of screwing the bolt in, the limit block is squeezed by the inner wall of the threaded hole and shrinks into the shrinkage hole. The limit plate compresses the telescopic spring. When the bolt is completed, After the threaded hole is fully screwed in, when the limit block reaches the limit hole position, under the elastic force of the telescopic spring, the limit block pops out and is stuck in the limit hole, thereby firmly fixing the bolt in the threaded hole, ensuring the stable connection between the dustproof plate and the shielding box. The baffle can prevent dust or foreign matter from falling directly into the shielding box from the vent, further improving the protection effect. At the same time, the protective shell can protect the motor from the influence of the external environment, ensuring the normal operation and service life of the motor. In this way, the protective device not only realizes the heat dissipation function, but also effectively prevents dust and foreign matter from entering the shielding box, providing a good operating environment for the equipment in the shielding box. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the front structure of the present invention; Figure 2 This is a schematic diagram of the side view structure of the present invention; Figure 3 It is a schematic diagram of the internal structure of the present invention; Figure 4This is a schematic diagram of the structure of the circuit breaker and the filter cooperating with each other in the present invention; Figure 5 It is a schematic diagram of the cross-sectional structure of the protective device of the present invention; Figure 6 This is a schematic diagram of the structure of the support rod and the telescopic rod cooperating with each other in the present invention; Figure 7 This is a schematic diagram of the structure of the buffer groove and the buffer block cooperating with each other in the present invention; Figure 8 For the present invention Figure 5 Enlarged structural diagram at A in the middle.

[0025] In the figure: 1. Shielding box; 2. Box door; 3. Warning sign; 4. Dehumidification port; 5. Moisture-proof layer; 6. Bracket; 7. Circuit breaker; 8. Filter; 9. Dehumidifier; 10. Protective device; 1001. Ventilation port; 1002. Dust plate; 1003. Threaded hole; 1004. Bolt; 1005. Contraction hole; 1006. Telescopic spring; 1007. Limiting plate; 1008. Limiting block; 1009. Limiting hole; 1010. Protective shell; 1011. Motor; 1012. Rotating Axis; 1013, heat dissipation blades; 1014, baffle; 11, buffer device; 1101, buffer box; 1102, support rod; 1103, telescopic rod; 1104, connecting plate; 1105, shock-absorbing pad; 1106, bottom plate; 1107, fixing bolt; 1108, locking ring; 1109, buffer groove; 1110, slide groove; 1111, telescopic tube; 1112, buffer spring; 1113, buffer rod; 1114, buffer block; 1115, slider; 1116, base. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] See also Figure 1-8The present invention provides a technical solution: an arc fault circuit breaker with an anti-interference function of the external environment, comprising a shielding box 1, a box door 2 is rotatably connected to the surface of the shielding box 1, a warning sign 3 is arranged on the outer surface of the box door 2, a dehumidification port 4 is provided at the outer bottom of the box door 2, a moisture-proof layer 5 is arranged on the inner wall surface of the shielding box 1, a bracket 6 is fixedly connected to the inner wall surface of the shielding box 1, a circuit breaker 7 is connected to the surface of the bracket 6, a filter 8 is connected in series to one side surface of the circuit breaker 7, a dehumidifier 9 is installed on the inner bottom surface of the shielding box 1, a protective device 10 is arranged on the inner surface of the shielding box 1, and a buffer device 11 is arranged on the outer bottom surface of the shielding box 1;

[0028] The buffer device 11 includes a buffer box 1101, a support rod 1102, a telescopic rod 1103, a connecting plate 1104, a shock absorbing pad 1105, a bottom plate 1106, a fixing bolt 1107, a locking ring 1108, a buffer groove 1109, a slide groove 1110, a telescopic tube 1111, a buffer spring 1112, a buffer rod 1113, a buffer block 1114, a slider 1115 and a base 1116. The buffer box 1101 is slidably connected to the bottom surface of the outer wall of the shielding box 1, the support rod 1102 is fixedly connected to the inner middle bottom surface of the buffer box 1101, the inner wall surface of the support rod 1102 is slidably connected to the telescopic rod 1103, the top surface of the telescopic rod 1103 is fixedly connected to the connecting plate 1104, and the top of the connecting plate 1104 The surface is fixedly connected to the bottom middle surface of the shielding box 1, the inner bottom surface of the buffer box 1101 is connected with a shock-absorbing pad 1105, the upper surface of the shock-absorbing pad 1105 is fixedly connected with a bottom plate 1106, both ends of the bottom plate 1106 and the shock-absorbing pad 1105 are penetrated by fixing bolts 1107, the outer wall surface of the fixing bolt 1107 is rotatably connected with a locking ring 1108, the upper surface of the bottom plate 1106 is fixedly connected with a buffer groove 1109, the inner wall of the buffer groove 1109 is provided with sliding grooves 1110 on both sides, the bottom surface of the inner wall of the buffer groove 1109 is fixedly connected with a telescopic tube 1111, the top surface of the telescopic tube 1111 is fixedly connected with a buffer spring 1112, the inner wall surface of the telescopic tube 1111 is slidably connected with a buffer rod 1113, The inner wall of the punching groove 1109 is slidably connected with a buffer block 1114, and the outer ends of the buffer block 1114 are fixedly connected with sliders 1115. The bottom surface of the buffer box 1101 is fixedly connected with a base 1116, and the top of the buffer rod 1113 is fixedly connected to the inner top of the buffer block 1114. Through the setting of the buffer device 11, when the shielding box 1 is impacted by an external force, the connecting plate 1104 will first transfer the impact force to the telescopic rod 1103, and the telescopic rod 1103 slides in the support rod 1102 to play a preliminary buffering role. At the same time, after the bottom middle surface of the shielding box 1 transfers the force to the connecting plate 1104, the connecting plate 1104 will be pressed downward. At this time, the buffer block 1114 is subjected to pressure from above and moves in the buffer groove 1109. When the buffer block 1114 slides downward, the sliders 1115 at the two ends of the outer side of the buffer block 1114 slide in the slide groove 1110 to ensure the stability of the movement of the buffer block 1114. When the buffer block 1114 slides downward, it will squeeze the buffer rod 1113, causing the buffer rod 1113 to shrink into the telescopic tube 1111, and the buffer spring 1112 in the telescopic tube 1111 will be compressed to absorb and buffer the impact force through its elastic deformation. The shock-absorbing pad 1105 and the bottom plate 1106 at the bottom of the buffer box 1101 will also work together. The shock-absorbing pad 1105 can further absorb the impact force and reduce the transmission of vibration. The fixing bolt 1107 and the locking ring 1108 ensure the connection stability of the shock-absorbing pad 1105 and the bottom plate 1106 to prevent loosening during long-term use.The base 1116 supports the entire buffer device 11 and can also disperse the remaining impact force to the installation plane, thereby effectively protecting the shielding box 1 from the impact of external forces and ensuring the normal use of the shielding box 1 and the safe and stable operation of the internal equipment.

[0029] Furthermore, a moisture-proof layer 5 is arranged on each surface of the inside of the shielding box 1, and the surface of the moisture-proof layer 5 is evenly sprayed with moisture-proof paint. Through the setting of the moisture-proof layer 5, the equipment in the shielding box 1 can be protected in all directions, and moisture that may penetrate from any direction can be effectively blocked, which greatly reduces the risk of equipment damage due to moisture. The moisture-proof paint evenly sprayed on the surface further enhances the moisture-proof effect. The moisture-proof paint can form a dense protective film to prevent the intrusion of moisture, thereby ensuring that the inside of the shielding box 1 always maintains a dry environment and extending the service life of the equipment.

[0030] Furthermore, multiple groups of circuit breakers 7 and filters 8 are arranged on the surface of the bracket 6, and the circuit breakers 7 and filters 8 are slidingly connected to the bracket 6. Through the setting of the circuit breaker 7 and the filter 8, multiple groups of circuit breakers 7 and filters 8 are arranged on the surface of the bracket 6, which can be flexibly configured according to actual needs. Different equipment may require circuit breakers 7 and filters 8 of different specifications. Multiple groups of settings can meet diverse needs.

[0031] Furthermore, multiple groups of dehumidification ports 4 are opened on the surface of the box door 2, and the positions of the dehumidification ports 4 correspond to the positions of the dehumidifiers 9. By setting the dehumidification ports 4 and the dehumidifiers 9, multiple groups of dehumidification ports 4 are opened on the surface of the box door 2, and correspond to the positions of the dehumidifiers 9, which can more effectively discharge the moisture in the box, increase the air circulation channels, improve the dehumidification efficiency, and ensure that the inside of the shielding box 1 always remains dry.

[0032] Furthermore, the protective device 10 includes a vent 1001, a dustproof plate 1002, a threaded hole 1003, a bolt 1004, a shrinkage hole 1005, a telescopic spring 1006, a limit plate 1007, a limit block 1008, a limit hole 1009, a protective shell 1010, a motor 1011, a rotating shaft 1012, a heat dissipation blade 1013 and a baffle 1014. The top of the shielding box 1 is provided with a vent 1001, the top surface of the inner wall of the shielding box 1 is threadedly connected to the dustproof plate 1002, the top surface of the inner wall of the shielding box 1 and the surface of the dustproof plate 1002 are both provided with threaded holes 1003, the inner wall surface of the threaded hole 1003 is threadedly connected with a bolt 1004, and shrinkage holes 1005 are provided on the inner sides of both ends of the bolt 1004. A telescopic spring 1006 is fixedly connected to the inner wall surface of the hole 1005 at one end, and the other end of the telescopic spring 1006 is fixedly connected to a limiting plate 1007, and the other end surface of the limiting plate 1007 is fixedly connected to a limiting block 1008. Limiting holes 1009 are provided on both sides of the bottom end of the threaded hole 1003. A protective shell 1010 is fixedly connected to the top surface of the shielding box 1, and a motor 1011 is fixedly connected to the inner surface of the protective shell 1010. A rotating shaft 1012 is fixedly connected to one end surface of the motor 1011, and a heat dissipation blade 1013 is fixedly connected to the outer wall surface of the rotating shaft 1012. A baffle 1014 is rotatably connected to the bottom end surface of the rotating shaft 1012, and the baffle 1014 is fixedly connected to the top of the inner wall of the shielding box 1. Through the protective device 10 When the motor 1011 is started, the rotating shaft 1012 is driven to rotate, thereby rotating the heat dissipation blades 1013. The rotation of the heat dissipation blades 1013 generates airflow, and the heat inside the shielding box 1 is discharged through the vents 1001, thereby realizing the heat dissipation of the equipment in the shielding box 1. During the heat dissipation process, the dustproof plate 1002 plays a role in blocking dust from entering the shielding box 1. When it is necessary to install or remove the dustproof plate 1002, the bolt 1004 is screwed into the threaded hole 1003. During the process of screwing the bolt 1004 in, the limit block 1008 is squeezed by the inner wall of the threaded hole 1003 and shrinks into the shrinkage hole 1005. The limit plate 1007 compresses the telescopic spring 1006. When the bolt 1004 is completely screwed into the threaded hole 1003, the limit block 10 When 08 reaches the position of the limit hole 1009, under the elastic force of the telescopic spring 1006, the limit block 1008 pops out and is stuck in the limit hole 1009, thereby firmly fixing the bolt 1004 in the threaded hole 1003, ensuring the stable connection between the dustproof plate 1002 and the shielding box 1, and the baffle 1014 can prevent dust or foreign matter from falling directly into the shielding box 1 from the vent 1001, further improving the protection effect. At the same time, the protective shell 1010 can protect the motor 1011 from the influence of the external environment, ensuring the normal operation and service life of the motor 1011. In this way, the protective device 10 not only realizes the heat dissipation function, but also effectively prevents dust and foreign matter from entering the shielding box 1, providing a good operating environment for the equipment in the shielding box 1.

[0033] Furthermore, multiple groups of ventilation holes 1001 are opened on the top of the shielding box 1, and the position of the dustproof plate 1002 corresponds to the position of the ventilation hole 1001. Through the setting of the dustproof plate 1002, each ventilation hole 1001 can be effectively protected to prevent dust from entering the shielding box 1 through the ventilation hole 1001, thereby avoiding dust accumulation to cause damage to the equipment and ensuring the stable performance of the equipment.

[0034] Furthermore, the dustproof plate 1002 is fixedly connected to the top of the inner wall of the shielding box 1 by bolts 1004 and threaded holes 1003, and multiple groups of bolts 1004 are arranged on the surface of the dustproof plate 1002. Through the arrangement of the bolts 1004, multiple groups of bolts 1004 and threaded holes 1003 fix the dustproof plate 1002 to the top of the inner wall of the shielding box 1, so that the connection between the dustproof plate 1002 and the shielding box 1 is more firm and reliable. During the operation of the equipment, the dustproof plate 1002 will not loosen or fall off due to vibration or other external factors.

[0035] Furthermore, the limit plate 1007 cooperates with the limit block 1008 through the telescopic spring 1006 to form a telescopic structure. The position of the limit block 1008 corresponds to the position of the limit hole 1009, and the outer wall size of the limit block 1008 is consistent with the inner wall size of the limit hole 1009. Through the setting of the limit block 1008 and the limit hole 1009, after the limit block 1008 is inserted into the limit hole 1009, it can effectively prevent the bolt 1004 from loosening during use, ensure that the dustproof plate 1002 is firmly fixed, and improve the stability of the protective device 10.

[0036] Furthermore, the inner wall size of the buffer box 1101 is consistent with the outer wall size of the shielding box 1, and the inner wall size of the slide groove 1110 is consistent with the outer wall size of the slider 1115. Through the setting of the slide groove 1110 and the slider 1115, the stability and accuracy of the buffer block 1114 when sliding in the buffer groove 1109 are ensured, and there will be no jamming or offset, so that the buffer device 11 can more effectively absorb impact force and protect the equipment in the shielding box 1.

[0037] Furthermore, multiple groups of buffer blocks 1114 are arranged at the bottom of the shielding box 1, and are symmetrically distributed at the four corners of the shielding box 1 with respect to the central axis of the shielding box 1. Multiple groups of bases 1116 are arranged on the bottom surface of the buffer box 1101. Through the arrangement of the buffer blocks 1114 and the bases 1116, the buffer blocks 1114 can uniformly absorb external force impacts in all directions. No matter which direction the shielding box 1 is subjected to impact force, it can be effectively buffered, thereby improving the protective effect of the buffer device 11. Multiple groups of bases 1116 can provide more stable support for the entire buffer device 11. During the operation of the equipment, the buffer device 11 will not tip over or move due to vibration or external force, thereby ensuring the safe and stable operation of the equipment.

[0038] Working principle: First, the shielding box 1 provides a physical protective barrier for the internal circuit breaker 7. When the equipment is put into operation, the box door 2 is closed, and the warning sign 3 serves to remind non-operating personnel to pay attention to safety. The moisture-proof layer 5 can effectively block the intrusion of external moisture, ensuring that the inside of the shielding box 1 always maintains a dry environment and protects electrical components such as the circuit breaker 7 and the filter 8 from the influence of moisture. The bracket 6 provides a stable installation position for the circuit breaker 7 and the filter 8. The circuit breaker 7 plays a control and protection role in the circuit. When a circuit fails, the power supply can be cut off in time. The filter 8 can filter the clutter in the circuit to improve the stability and reliability of the circuit. If the humidity inside the shielding box 1 increases, the dehumidifier 9 will discharge the moisture in the box through the dehumidification port 4. , keep the interior dry, the setting of multiple groups of dehumidification ports 4 can improve the dehumidification efficiency and ensure uniform dehumidification effect. When the internal components generate a lot of temperature or the ambient temperature is too high, the motor 1011 starts, driving the rotating shaft 1012 to rotate, thereby rotating the heat dissipation blades 1013. The rotation of the heat dissipation blades 1013 generates airflow, and the heat inside the shielding box 1 is discharged through the vents 1001, thereby realizing the heat dissipation of the equipment in the shielding box 1. During the heat dissipation process, the dustproof plate 1002 plays a role in preventing dust from entering the shielding box 1. When the dustproof plate 1002 needs to be installed or removed, the bolt 1004 is screwed into the threaded hole 1003. During the process of screwing the bolt 1004 in, the limit block 1008 is squeezed by the inner wall of the threaded hole 1003 and is retracted. The shrinkage hole 1005 shrinks, and the limit plate 1007 compresses the telescopic spring 1006. When the bolt 1004 is completely screwed into the threaded hole 1003, the limit block 1008 reaches the position of the limit hole 1009. Under the elastic force of the telescopic spring 1006, the limit block 1008 pops out and is stuck in the limit hole 1009, thereby firmly fixing the bolt 1004 in the threaded hole 1003, ensuring that the connection between the dustproof plate 1002 and the shielding box 1 is stable, and the baffle 1014 can prevent dust or foreign matter from falling directly into the shielding box 1 from the vent 1001, further improving the protection effect. At the same time, the protective shell 1010 can protect the motor 1011 from the influence of the external environment, ensuring the normal operation and service life of the motor 1011. In this way, the protective device The device 10 can not only realize the heat dissipation function, but also effectively prevent dust and foreign matter from entering the shielding box 1, providing a good operating environment for the equipment in the shielding box 1. When the shielding box 1 is impacted by external force, the connecting plate 1104 will first transfer the impact force to the telescopic rod 1103, and the telescopic rod 1103 will slide in the support rod 1102 to play a preliminary buffering role. At the same time, after the bottom middle surface of the shielding box 1 transfers the force to the connecting plate 1104, the connecting plate 1104 will be pressed down. At this time, the buffer block 1114 is subjected to pressure from above and slides downward in the buffer groove 1109. The sliders 1115 at the two ends of the outer side of the buffer block 1114 slide in the slide groove 1110 to ensure the stability of the movement of the buffer block 1114. When the buffer block 1114 slides downward,The buffer rod 1113 will be squeezed, causing the buffer rod 1113 to shrink into the telescopic tube 1111, and the buffer spring 1112 in the telescopic tube 1111 will be compressed, absorbing and buffering the impact force through its elastic deformation, and the shock-absorbing pad 1105 and the bottom plate 1106 at the bottom of the buffer box 1101 will also work together. The shock-absorbing pad 1105 can further absorb the impact force and reduce the transmission of vibration. The fixing bolt 1107 and the locking ring 1108 ensure the connection stability between the shock-absorbing pad 1105 and the bottom plate 1106 to prevent loosening during long-term use. The base 1116 supports the entire buffer device 11 and can also disperse the remaining impact force to the installation plane, thereby effectively protecting the shielding box 1 from the impact of external forces, ensuring the normal use of the shielding box 1 and the safe and stable operation of the internal equipment. The model of the motor 1011 is Y315S-2, thus completing the use process of an arc fault circuit breaker with the function of resisting external environmental interference.

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An arc fault circuit breaker with a function of resisting external environmental interference, comprising a shielding box (1), characterized in that: The surface of the shielding box (1) is rotatably connected to a box door (2), the outer surface of the box door (2) is provided with a warning sign (3), the outer bottom of the box door (2) is provided with a dehumidification port (4), the inner wall surface of the shielding box (1) is provided with a moisture-proof layer (5), the inner wall surface of the shielding box (1) is fixedly connected to a bracket (6), the surface of the bracket (6) is connected to a circuit breaker (7), a filter (8) is connected in series to one side surface of the circuit breaker (7), a dehumidifier (9) is installed on the inner bottom surface of the shielding box (1), a protective device (10) is provided on the inner surface of the shielding box (1), and a buffer device (11) is provided on the outer bottom surface of the shielding box (1); The buffer device (11) comprises a buffer box (1101), a support rod (1102), a telescopic rod (1103), a connecting plate (1104), a shock absorbing pad (1105), a bottom plate (1106), a fixing bolt (1107), a locking ring (1108), a buffer groove (1109), a slide groove (1110), a telescopic tube (1111), a buffer spring (1112), a buffer rod (1113), a buffer block (1114), a slider (1115) and a base (1116). The bottom surface of the outer wall of the shielding box (1) A buffer box (1101) is slidably connected, a support rod (1102) is fixedly connected to the inner middle bottom surface of the buffer box (1101), a telescopic rod (1103) is slidably connected to the inner wall surface of the support rod (1102), a connecting plate (1104) is fixedly connected to the top surface of the telescopic rod (1103), the top surface of the connecting plate (1104) is fixedly connected to the bottom middle surface of the shielding box (1), a shock absorbing pad (1105) is connected to the inner bottom surface of the buffer box (1101), and the shock absorbing pad (1105) The upper surface of the bottom plate (1105) is fixedly connected to a bottom plate (1106), both ends of the bottom plate (1106) and the shock-absorbing pad (1105) are penetrated by fixing bolts (1107), the outer wall surface of the fixing bolt (1107) is rotatably connected to a locking ring (1108), the upper surface of the bottom plate (1106) is fixedly connected to a buffer groove (1109), both sides of the inner wall of the buffer groove (1109) are provided with sliding grooves (1110), and the bottom surface of the inner wall of the buffer groove (1109) is fixedly connected to a telescopic tube (1111), so that The top surface of the telescopic tube (1111) is fixedly connected to a buffer spring (1112), the inner wall surface of the telescopic tube (1111) is slidably connected to a buffer rod (1113), the inner wall of the buffer groove (1109) is slidably connected to a buffer block (1114), the outer ends of the buffer block (1114) are fixedly connected to sliders (1115), the bottom surface of the buffer box (1101) is fixedly connected to a base (1116), and the top of the buffer rod (1113) is fixedly connected to the inner top of the buffer block (1114).

2. The arc fault circuit breaker with anti-external environment interference function according to claim 1, characterized in that: The moisture-proof layer (5) is arranged on each surface inside the shielding box (1), and the surface of the moisture-proof layer (5) is evenly sprayed with moisture-proof paint.

3. The arc fault circuit breaker with the function of resisting external environmental interference according to claim 1, characterized in that: The circuit breakers (7) and filters (8) are arranged in multiple groups on the surface of the bracket (6), and the circuit breakers (7) and filters (8) are slidably connected to the bracket (6).

4. The arc fault circuit breaker with the function of resisting external environmental interference according to claim 1, characterized in that: The dehumidification ports (4) are provided in multiple groups on the surface of the cabinet door (2), and the positions of the dehumidification ports (4) correspond to the positions of the dehumidifiers (9).

5. The arc fault circuit breaker with the function of resisting external environmental interference according to claim 1, characterized in that: The protective device (10) comprises a vent (1001), a dustproof plate (1002), a threaded hole (1003), a bolt (1004), a shrinkage hole (1005), a telescopic spring (1006), a limit plate (1007), a limit block (1008), a limit hole (1009), a protective shell (1010), a motor (1011), a rotating shaft (1012), a heat dissipation blade (1013) and a baffle (1014); the top of the shielding box (1) is provided with a vent (1001); the top surface of the inner wall of the shielding box (1) is threadedly connected to the dustproof plate (1002); the top surface of the inner wall of the shielding box (1) and the surface of the dustproof plate (1002) are both provided with threaded holes (1003); the inner wall surface of the threaded hole (1003) is threadedly connected to the bolt (1004); the inner sides of both ends of the bolt (1004) are provided with shrinkage holes (1005); ), a telescopic spring (1006) is fixedly connected to the inner wall surface of one end of the shrinkage hole (1005), the other end of the telescopic spring (1006) is fixedly connected to a limit plate (1007), the other end of the limit plate (1007) is fixedly connected to a limit block (1008), and limit holes (1009) are provided on both sides of the bottom end of the threaded hole (1003), the top surface of the shielding box (1) is fixedly connected to a protective shell (1010), the inner surface of the protective shell (1010) is fixedly connected to a motor (1011), one end surface of the motor (1011) is fixedly connected to a rotating shaft (1012), the outer wall surface of the rotating shaft (1012) is fixedly connected to a heat dissipation blade (1013), the bottom end surface of the rotating shaft (1012) is rotatably connected to a baffle (1014), and the baffle (1014) is fixedly connected to the top of the inner wall of the shielding box (1).

6. The arc fault circuit breaker with the function of resisting external environmental interference according to claim 5, characterized in that: The ventilation openings (1001) are provided in multiple groups on the top of the shielding box (1), and the positions of the dustproof plates (1002) correspond to the positions of the ventilation openings (1001).

7. The arc fault circuit breaker with the function of resisting external environmental interference according to claim 5, characterized in that: The dustproof plate (1002) is fixedly connected to the top of the inner wall of the shielding box (1) via bolts (1004) and threaded holes (1003), and multiple groups of bolts (1004) are arranged on the surface of the dustproof plate (1002).

8. The arc fault circuit breaker with the function of resisting external environmental interference according to claim 5, characterized in that: The limiting plate (1007) cooperates with the limiting block (1008) through the telescopic spring (1006) to form a telescopic structure, the position of the limiting block (1008) corresponds to the position of the limiting hole (1009), and the outer wall size of the limiting block (1008) matches the inner wall size of the limiting hole (1009).

9. The arc fault circuit breaker with the function of resisting external environmental interference according to claim 1, characterized in that: The inner wall size of the buffer box (1101) matches the outer wall size of the shielding box (1), and the inner wall size of the slide groove (1110) matches the outer wall size of the slide block (1115).

10. The arc fault circuit breaker with the function of resisting external environmental interference according to claim 1, characterized in that: The buffer blocks (1114) are arranged in multiple groups at the bottom of the shielding box (1) and are symmetrically distributed at the four corners of the shielding box (1) with respect to the central axis of the shielding box (1), and the bases (1116) are arranged in multiple groups on the bottom surface of the buffer box (1101).

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