Sand-prevention assembly and circuit breaker

Abstract

The application relates to a wind-sand prevention assembly and a circuit breaker. The wind-sand prevention assembly comprises a mounting bracket, which is arranged on a main body of the circuit breaker. The mounting bracket is provided with a mounting cavity and an air inlet hole in communication. The mounting cavity is in communication with a working cavity of the main body of the circuit breaker. The direction of the air inlet hole to the mounting cavity is a sand wind entering direction. The wind-sand prevention assembly further comprises a first sand blocking plate and a second sand blocking plate. The first sand blocking plate and the second sand blocking plate are arranged in the mounting cavity in parallel and at intervals along the sand wind entering direction. The first sand blocking plate and the second sand blocking plate are arranged in a staggered mode along a direction intersecting the sand wind entering direction, so that the first sand blocking plate and the second sand blocking plate can cooperatively block the sand wind entering from the air inlet hole from flowing into the working cavity through the mounting cavity. A heat dissipation interval is formed between the first sand blocking plate and the second sand blocking plate. The heat dissipation interval, the mounting cavity and the air inlet hole are in communication to form a heat dissipation channel arranged in the direction from the mounting cavity to the air inlet hole. The heat dissipation channel is used for discharging heat in the working cavity.

Description

Technical Field

[0001] This application relates to the technical field of electrical control devices, and in particular to a sand-proof component and circuit breaker. Background Technology

[0002] A circuit breaker is an automatic protective switch used in electrical circuits. When a short circuit, overload, or leakage occurs, it automatically trips to cut off power, preventing fires, equipment damage, electric shocks, and other dangerous accidents. In certain situations, circuit breakers are used in special environments such as deserts or areas with heavy sandstorms, where sand and gravel are carried by the wind through the air intake channel of the arc-extinguishing hood to the top of the arc-extinguishing chamber, and then enter the arc-extinguishing chamber and the conductive system through the gaps between the flame-extinguishing plates.

[0003] However, circuit breakers generate a lot of heat during operation. Gravel accumulating on the surface of the flame extinguishing disc can cause blockage, severely hindering heat dissipation and affecting the arc blowing and extinguishing performance. Especially during the high-temperature period in summer, the poor heat dissipation caused by gravel will further accelerate the aging of the internal components of the circuit breaker, which may eventually lead to the circuit breaker malfunctioning or burning out due to overheating. Gravel usually contains conductive media (such as salt and alkali components or metal dust). When these conductive media adhere to the surface of the circuit breaker's insulation components, they are very likely to cause creepage or flashover in humid environments (such as condensation or high humidity conditions), affecting the insulation performance of the circuit breaker. Summary of the Invention

[0004] Therefore, it is necessary to provide a wind and sand resistant component and circuit breaker to address the problem of poor heat dissipation, which affects the safety, reliability, and insulation performance of equipment.

[0005] A first aspect of this application provides a windbreak and sand-proof component, comprising:

[0006] The mounting bracket is used to install on electrical equipment with an air outlet. The mounting bracket has a connected mounting cavity and an air inlet. The mounting cavity is used to communicate with the working cavity of the electrical equipment through the air outlet. The direction from the air inlet to the mounting cavity is set as the direction of wind and sand entry.

[0007] A first sand-blocking plate and a second sand-blocking plate are arranged side by side and spaced apart in the mounting cavity along the direction of sand and wind entry, and the first sand-blocking plate and the second sand-blocking plate are staggered along the direction intersecting with the direction of sand and wind entry, so that the first sand-blocking plate and the second sand-blocking plate can work together to block the sand and wind entering through the air inlet from passing through the mounting cavity and entering the working cavity.

[0008] The first sand baffle and the second sand baffle form a heat dissipation gap. The heat dissipation gap, the mounting cavity and the air inlet are connected to form a heat dissipation channel arranged from the mounting cavity to the air inlet. The heat dissipation channel is used to dissipate heat from the working cavity.

[0009] The wind and sand protection component in this solution is installed at the air outlet of electrical equipment, such as a circuit breaker. The circuit breaker body includes at least an arc-extinguishing shroud, an arc-extinguishing chamber, and a conductive system arranged sequentially. More specifically, the wind and sand protection component is installed at the air outlet of the arc-extinguishing shroud, thus establishing a communication between the mounting cavity of the mounting bracket and the working cavity of the circuit breaker body. The working cavity of the circuit breaker body includes, but is not limited to, the arc-extinguishing cavity of the arc-extinguishing shroud, the arc-extinguishing cavity of the arc-extinguishing chamber, and the internal gap of the conductive system. By providing an air inlet on the mounting bracket, a pathway is formed between the working cavity of the circuit breaker body and the external environment through the mounting cavity and the air inlet. Based on this, the direction from the air inlet to the mounting cavity is designated as the direction of wind and sand entry. Furthermore, since the mounting cavity of the mounting bracket is equipped with a first and a second sand-blocking plate, which are not only arranged side-by-side at intervals along the direction of sand and wind entry, but also staggered along the direction intersecting with the direction of sand and wind entry, when sand and wind from the external environment enter the mounting cavity through the air inlet, they will be blocked by the first and second sand-blocking plates in turn, thus effectively preventing sand and wind from passing through the mounting cavity and flowing into the working cavity. At the same time, the heat generated by the circuit breaker body during operation can be normally discharged to the external environment, that is, while blocking sand and wind from entering, the necessary airflow exchange of the circuit breaker is maintained, and the heat is discharged in a timely manner. This effectively solves the problem of sand and gravel accumulating on the surface of the flame extinguishing disc, causing blockage, severely hindering heat dissipation, and affecting the arc blowing and extinguishing performance. Especially during the high-temperature period in summer, the poor heat dissipation caused by sand and gravel will further accelerate the aging of the internal components of the circuit breaker, which may eventually lead to the circuit breaker malfunctioning or burning out due to overheating. At the same time, it prevents wind and sand from entering the interior of the circuit breaker body, and also effectively solves the problem that when conductive media (such as salt and alkali components or metal dust) in sand and gravel adhere to the surface of the circuit breaker's insulation components, creepage or flashover can easily occur in humid environments (such as condensation or high humidity conditions), affecting the insulation performance of the circuit breaker, greatly improving the safety and reliability of the circuit breaker operation.

[0010] The technical solution of this application will be further described below:

[0011] In one embodiment, in the direction in which the sand enters, the sum of the projected areas of the first and second sand-blocking plates completely covers the air inlet.

[0012] In one embodiment, the first sand-blocking plate and the second sand-blocking plate are partially overlapped in the direction in which the sand enters.

[0013] In one embodiment, multiple air inlets are provided, and the multiple air inlets are distributed at intervals on the same side of the mounting bracket;

[0014] Multiple first and second sand-blocking plates are provided. The multiple first and second sand-blocking plates are arranged side by side and spaced apart in the mounting cavity along the direction of sand and wind entry. The multiple first and second sand-blocking plates are also arranged side by side and spaced apart perpendicular to the direction of sand and wind entry. Two first sand-blocking plates are distributed at intervals on both radially opposite sides of any air inlet, and the two first sand-blocking plates cover the first part of the air inlet. A second sand-blocking plate is arranged between two adjacent first sand-blocking plates. The second sand-blocking plate is arranged one-to-one with the air inlet and covers the second part of the air inlet. The sum of the first part and the second part is the entire air inlet.

[0015] In one embodiment, in the direction of sand ingress, a second sand-blocking plate and two adjacent first sand-blocking plates are arranged to overlap at least partially with the projection of the air inlet.

[0016] In one embodiment, the first sand baffle is disposed between two adjacent air inlets, and a portion of the first sand baffle blocks a portion of one of the air inlets, while another portion of the second sand baffle blocks a portion of the other air inlet.

[0017] In one embodiment, the first sand baffle includes a first rib and a first plate, at least one of the first rib and the first plate is disposed on the mounting bracket, and the first rib is connected to the first plate. The first rib is located between the air inlet and the first plate, so that the first plate and the air inlet are spaced apart.

[0018] The second sand baffle includes a second rib and a second plate. At least one of the second rib and the second plate is disposed on the mounting bracket, and the second rib is connected to the second plate. The second rib is located between the air inlet and the second plate, and the second plate is aligned with the air inlet.

[0019] In one embodiment, the first plate is a first arc plate, and the arc-shaped concave side of the first arc plate is arranged facing the air inlet hole;

[0020] The second plate is a second arc plate, and the concave side of the second arc plate is oriented toward the air inlet.

[0021] In one embodiment, the mounting bracket includes a motherboard, a first side plate, a second side plate, and a top plate. The first side plate and the second side plate are respectively connected to opposite sides of the motherboard along its length. The top plate is connected to the same side of the motherboard, the first side plate, and the second side plate, so that the motherboard, the first side plate, the second side plate, and the top plate cooperate to form the mounting cavity. The air inlet is formed through the motherboard.

[0022] The first side plate, the second side plate, and the top plate cooperate to form a first opening, and the mounting cavity is used to communicate with the air outlet through the first opening;

[0023] The motherboard, the first side plate, and the second side plate cooperate to form a second opening. The second opening communicates with the mounting cavity. When the windproof and sandproof component is in the installation and use state, the second opening is at the bottom, and the motherboard is located on the back side of the electrical device.

[0024] In one embodiment, the mounting bracket further includes a first additional plate disposed on a first sand-blocking plate and located in the second opening;

[0025] Or / and, the mounting bracket further includes a second additional plate, which is disposed on the second sand baffle plate in the second open arrangement.

[0026] In one embodiment, the mounting bracket further includes a first mounting plate, which is connected to the first side plate, and the first mounting plate is provided with a first connecting portion for assembly connection with the circuit breaker body;

[0027] Or / and, the mounting bracket further includes a second mounting plate, the second mounting plate being connected to the second side plate, and the second mounting plate having a second connecting portion for assembly connection with the circuit breaker body.

[0028] In one embodiment, a sand-blocking ring is formed protruding on the outer side of the motherboard away from the mounting cavity, and the sand-blocking ring is arranged corresponding to the air inlet.

[0029] In one embodiment, the wind and sand protection component further includes a third sand baffle plate, which is installed on the inner side of the main board for forming the mounting cavity and is arranged close to the first side plate; the third sand baffle plate is used to block the portion of one of the air inlets arranged closest to the first side plate.

[0030] Or / and, the windproof sandproof assembly further includes a fourth sand-blocking plate, which is installed on the inner side of the main board for forming the mounting cavity and is arranged close to the second side plate; the fourth sand-blocking plate is used to block the portion of one of the air inlets closest to the second side plate.

[0031] In one embodiment, the wind and sand protection component further includes a first reinforcing baffle, which is installed in the mounting cavity and positioned between the first sand-blocking plate and the second sand-blocking plate along the wind and sand entry direction.

[0032] The first reinforcing baffle is provided with a first through hole and a first blocking part. The first blocking part is used to block some of the wind and sand entering from the air inlet. The first through hole is connected to the heat dissipation channel.

[0033] In one embodiment, multiple first through holes and first blocking parts are provided, and the first through holes and the first blocking parts are arranged alternately. Along the direction of wind and sand entry, the first sand baffle is arranged in a corresponding manner to the first through hole, and the first blocking part, the air inlet hole and the second sand baffle are arranged in a corresponding manner.

[0034] In one embodiment, the first reinforcing baffle is provided with a first mounting portion, and the mounting bracket is provided with a first mating portion. The first mounting portion is connected to the first mating portion so that the first reinforcing baffle is assembled and fixed with the mounting bracket.

[0035] In one embodiment, one of the first mounting part and the first mating part is configured as a first hook, and the other of the first mounting part and the first mating part is configured as a first slot, and the first hook engages with the first slot.

[0036] In one embodiment, the wind and sand protection component further includes a second reinforcing baffle, which is installed in the mounting cavity and is located on the side of the second baffle away from the first baffle along the wind and sand entry direction;

[0037] The second reinforcing baffle is provided with a second through hole and a second blocking part. The second blocking part is used to block part of the wind and sand that enters from the air inlet at the maximum tilt angle. The second through hole is connected to the heat dissipation channel.

[0038] In one embodiment, multiple second through holes and second blocking parts are provided, and the second through holes and second blocking parts are arranged alternately. Along the direction of wind and sand entry, the second through holes, the second sand baffle and the air inlet are arranged in a corresponding manner, and the second blocking parts are arranged in a corresponding manner with the first sand baffle.

[0039] In one embodiment, the second reinforcing baffle is provided with a second mounting portion, and the mounting bracket is provided with a second mating portion. The second mounting portion is connected to the second mating portion so that the second reinforcing baffle is assembled and fixed with the mounting bracket.

[0040] In one embodiment, one of the second mounting part and the second mating part is configured as a second hook, and the other of the second mounting part and the second mating part is configured as a second slot, and the second hook engages with the second slot.

[0041] A second aspect of this application also proposes a circuit breaker comprising:

[0042] The circuit breaker body has an arc-suppressing cover;

[0043] As described in any of the above embodiments, the wind and sand protection component is installed on the arc suppression cover. Attached Figure Description

[0044] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.

[0045] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0046] Figure 1 This is a schematic diagram of the structure of a circuit breaker according to one embodiment.

[0047] Figure 2 for Figure 1 A schematic diagram of the internal structure of the circuit breaker body.

[0048] Figure 3 This is a schematic diagram of the internal structure of a sand-proof component according to one embodiment.

[0049] Figure 4 for Figure 3 The main view structure diagram.

[0050] Figure 5 In order to be in Figure 4 A schematic diagram of the structure with a third and fourth sand-blocking plate added on the basis of the medium-sized wind and sand protection component.

[0051] Figure 6 In order to be in Figure 5 A schematic diagram of a structure with a first reinforcing baffle added on top of the wind and sand protection component.

[0052] Figure 7 In order to be in Figure 3 A schematic diagram of a structure with a first reinforcing baffle added on top of the wind and sand protection component.

[0053] Figure 8 This is a structural schematic diagram of a sand-proof component according to another embodiment.

[0054] Figure 9 for Figure 8 The main view structure diagram.

[0055] Figure 10 for Figure 8 A top-view structural diagram.

[0056] Figure 11 for Figure 10 A schematic diagram of the cross-sectional structure at point AA.

[0057] Figure 12 This is a schematic diagram of the structure of the first reinforcing baffle in one embodiment.

[0058] Figure 13 This is a schematic diagram of the structure of the second reinforcing baffle in one embodiment.

[0059] Explanation of reference numerals in the attached figures:

[0060] 100. Circuit breaker; 10. Sand-proof component; 11. Mounting bracket; 111. Mounting cavity; 112. Air inlet; 113. Main board; 114. First side plate; 115. Second side plate; 116. Top plate; 117. First opening; 118. Second opening; 119. First mounting plate; 1191. First connecting part; 119a. Second mounting plate; 1191a. Second connecting part; 119b. First mating part; 1191b. First slot; 119c. Second mating part; 1191c. Second slot; 12. First sand baffle; 121. First reinforcing rib; 122. First plate; 13. Second sand baffle; 131. Second rib; 132. Second plate; 14. Heat dissipation gap; 15. Sand baffle ring; 16. Third sand baffle; 17. Fourth sand baffle; 18. First reinforcing baffle; 181. First through hole; 182. First blocking part; 183. First mounting part; 183a. First hook; 19. Second reinforcing baffle; 191. Second through hole; 192. Second blocking part; 193. Second mounting part; 193a. Second hook; 20. Circuit breaker body; 21. Arc extinguishing cover; 22. Arc extinguishing chamber; 23. Conductive system. Detailed Implementation

[0061] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0062] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0063] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0064] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0065] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0066] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0067] This application protects an electrical device that has a vent for heat dissipation and other operational needs. For example, the electrical device may be, but is not limited to, a circuit breaker, a disconnector, a rotary switch, or other switching devices.

[0068] Please refer to the following for details. Figure 1 The electrical device described in one embodiment of this application is a circuit breaker 100. Specifically, the circuit breaker 100 can be any one of, but not limited to, a frame circuit breaker, a universal circuit breaker, etc., and can be flexibly selected according to actual needs.

[0069] Please continue reading. Figure 2 For example, the circuit breaker 100 includes a circuit breaker body 20 and a wind and sand protection assembly 10. The circuit breaker body 20 has an arc-suppressing shield 21, an arc-extinguishing chamber 22, and a conductive system 23. As can be seen, the overall shape of the circuit breaker 100 is a cuboid-like structure, with the arc-suppressing shield 21, the arc-extinguishing chamber 22, and the conductive system 23 arranged sequentially along the length of the circuit breaker body 20.

[0070] The wind and sand protection component 10 is installed on the arc suppression cover 21. Specifically, the wind and sand protection component 10 is installed on the back of the arc suppression cover 21 and is specifically adapted to the air outlet on the back to prevent wind and sand in the environment from entering the circuit breaker body 20 from the back and sides.

[0071] Please continue reading. Figure 3 and Figure 4Specifically, the sand-proof component 10 of this application includes a mounting bracket 11, a first sand-blocking plate 12, and a second sand-blocking plate 13. The mounting bracket 11 is used to install on the circuit breaker body 20 so that the sand-proof component 10 can be assembled onto the circuit breaker body 20 as a whole.

[0072] The mounting bracket 11 is provided with a connected mounting cavity 111 and an air inlet 112. The mounting cavity 111 is used to communicate with the working cavity of the circuit breaker body 20 through the air outlet. The direction from the air inlet 112 to the mounting cavity 111 is set as the direction of wind and sand entry. That is to say, wind and sand in the external environment first flow into the mounting cavity 111 through the air inlet 112, and then flow into the working cavity of the circuit breaker body 20 through the air outlet.

[0073] Specifically, the direction of the sandstorm entry corresponds to Figure 1 and Figure 4 The direction of the middle arrow S1.

[0074] For example, in this application, the windproof sandproof component 10 is a rectangular parallelepiped structure, and the direction of wind and sand entry specifically corresponds to the thickness direction of the windproof sandproof component 10.

[0075] The first sand-blocking plate 12 and the second sand-blocking plate 13 are arranged side by side at intervals in the installation cavity 111 along the direction of sand and wind entry, and the first sand-blocking plate 12 and the second sand-blocking plate 13 are staggered along the direction intersecting with the direction of sand and wind entry, so that the first sand-blocking plate 12 and the second sand-blocking plate 13 can work together to block the sand and wind entering through the air inlet 112 from passing through the installation cavity 111 and entering the working cavity.

[0076] It should be noted that in actual operation, the first sand baffle 12 can block all or part of the sand entering from the air inlet 112, and the second sand baffle 13 can block the remaining sand that is not effectively blocked by the first sand baffle 12, thereby completely and effectively preventing the sand flowing into the air inlet 112 from entering the circuit breaker body 20 and causing damage.

[0077] Please continue reading. Figure 4 The first baffle plate 12 and the second baffle plate 13 form a heat dissipation gap 14. The heat dissipation gap 14, the mounting cavity 111 and the air inlet 112 are connected to form a heat dissipation channel arranged from the mounting cavity 111 to the air inlet 112. The heat dissipation channel is used to dissipate heat from the working cavity.

[0078] For example, the direction in which heat is discharged from the heat dissipation channel corresponds to Figure 1 and Figure 4 The direction of the middle arrow S2.

[0079] In summary, implementing the technical solution of this embodiment will achieve the following beneficial effects: The wind and sand protection component 10 of this solution is used to install on the circuit breaker body 20 so that the two can be assembled to form the circuit breaker 100 product. The circuit breaker body 20 includes at least an arc-extinguishing cover 21, an arc-extinguishing chamber 22, and a conductive system 23 arranged sequentially. More specifically, the wind and sand protection component 10 is installed at the air outlet of the arc-extinguishing cover 21, so that the mounting cavity 111 of the mounting bracket 11 can form a communication relationship with the working cavity of the circuit breaker body 20. The working cavity of the circuit breaker body 20 includes, but is not limited to, the arc-extinguishing cavity of the arc-extinguishing cover 21, the arc-extinguishing cavity of the arc-extinguishing chamber 22, and the internal gap of the conductive system 23. By providing an air inlet 112 on the mounting bracket 11, the working cavity of the circuit breaker body 20 can form a passage with the external environment through the mounting cavity 111 and the air inlet 112. Based on this, the direction from the air inlet 112 to the mounting cavity 111 is set as the direction of wind and sand entry.

[0080] Furthermore, since the mounting cavity 111 of the mounting bracket 11 is equipped with a first sand-blocking plate 12 and a second sand-blocking plate 13, the first sand-blocking plate 12 and the second sand-blocking plate 13 are not only arranged side by side at intervals along the direction of sand and wind entry, but also staggered along the direction intersecting with the direction of sand and wind entry. Therefore, when sand and wind from the external environment enter the mounting cavity 111 through the air inlet 112, they will be blocked by the first sand-blocking plate 12 and the second sand-blocking plate 13, thereby effectively preventing sand and wind from passing through the mounting cavity 111 and flowing into the working cavity. At the same time, the heat generated by the circuit breaker body 20 during operation can be normally discharged to the external environment, that is, while blocking sand and wind from entering, the necessary airflow exchange of the circuit breaker 100 is maintained. The timely removal of heat effectively solves the problem of sand and gravel accumulating on the surface of the flame extinguishing disc and causing blockage, which severely hinders heat dissipation and affects the arc blowing and extinguishing performance. Especially during the high-temperature period in summer, the poor heat dissipation caused by sand and gravel will further accelerate the aging of the internal components of the circuit breaker 100, which may eventually lead to the circuit breaker 100 malfunctioning or burning out due to overheating. At the same time, it also prevents wind and sand from entering the interior of the circuit breaker body 20, and can also effectively solve the problem that when conductive media (such as salt and alkali components or metal dust) in sand and gravel adhere to the surface of the insulation of the circuit breaker 100, creepage or flashover can easily occur in humid environments (such as condensation or high humidity conditions), affecting the insulation performance of the circuit breaker 100, thus greatly improving the safety and reliability of the circuit breaker 100.

[0081] Please continue reading. Figure 3 and Figure 4Based on the above embodiment, in the direction of sand ingress, the sum of the projected areas of the first sand-blocking plate 12 and the second sand-blocking plate 13 completely covers the air inlet 112. This arrangement avoids air leakage gaps between the wall of the air inlet 112 and the edge of the baffle structure formed by the first and second sand-blocking plates 12 and 13, ensuring that the first and second sand-blocking plates 12 and 13 completely block the opening of the air inlet 112. This ensures that the first and second sand-blocking plates 12 and 13 effectively and completely block the sand flowing in from the air inlet 112, guaranteeing the sand-blocking protection effectiveness of the first and second sand-blocking plates 12 and 13 for the circuit breaker body 20.

[0082] The sum of the projected areas of the first sand-blocking plate 12 and the second sand-blocking plate 13 can include either the projection of the first sand-blocking plate 12 and the projection of the second sand-blocking plate 13 overlapping or exactly not overlapping. The choice can be flexible and no specific limitation is made here.

[0083] The sum of the projected areas of the first baffle plate 12 and the second baffle plate 13 completely covers the air inlet 112. Specifically, this includes two cases: the sum of the projected areas of the two baffle plates is exactly equal to the opening area of ​​the air inlet 112, or the sum of the projected areas of the two baffle plates is greater than the opening area of ​​the air inlet 112. The choice can be flexible and no specific limitation is made here.

[0084] It should be noted that by reasonably designing the area and shape of the first sand-blocking plate 12 and the second sand-blocking plate 13, or by sacrificing part of the area of ​​the air inlet 112, it is possible to block the sand and wind entering from the air inlet 112 at the maximum tilt angle.

[0085] Please continue reading. Figure 3 and Figure 4 Furthermore, in an optional embodiment of this application, the first sand-blocking plate 12 and the second sand-blocking plate 13 are partially overlapped in the direction of sand ingress. Thus, when some sand entering through the air inlet 112 and passing over the first sand-blocking plate 12 without being effectively blocked flows onto the second sand-blocking plate 13, it is blocked by a larger area of ​​the second sand-blocking plate 13. This increases the difficulty for this portion of sand to pass through the gap between the first sand-blocking plate 12 and the second sand-blocking plate 13, thereby enhancing the sand-blocking capability of the second sand-blocking plate 13.

[0086] Please continue reading. Figure 1 , Figure 8 and Figure 10 Furthermore, based on any of the above embodiments, the mounting bracket 11 has multiple air inlets 112, which are spaced apart on the same side of the mounting bracket 11. For example, Figure 1The diagram shows an embodiment with two rows of twelve air inlets 112. By increasing the number of air inlets 112, the area of ​​the heat dissipation channel is increased, thereby enhancing the heat dissipation efficiency of the circuit breaker 100.

[0087] Of course, in other optional embodiments, the number and arrangement of the air inlets 112 can also be varied. The choice can be made flexibly according to actual needs, and will not be elaborated on here.

[0088] Furthermore, multiple first sand-blocking plates 12 and multiple second sand-blocking plates 13 are provided. Multiple first sand-blocking plates 12 and multiple second sand-blocking plates 13 are arranged side by side and spaced apart in the installation cavity 111 along the direction of wind and sand entry. The multiple first sand-blocking plates 12 and multiple second sand-blocking plates 13 are arranged side by side and spaced apart perpendicular to the direction of wind and sand entry. Two first sand-blocking plates 12 are distributed on each radially opposite side of any air inlet 112. The two first sand-blocking plates 12 block the first part of the air inlet 112. A second sand-blocking plate 13 is arranged between two adjacent first sand-blocking plates 12. The second sand-blocking plate 13 is arranged one-to-one with the air inlet 112 and blocks the second part of the air inlet 112. The sum of the first part and the second part is the entire air inlet 112.

[0089] In this way, it can be ensured that multiple first sand baffles 12 and multiple second sand baffles 13 are reasonably arranged in the mounting cavity 111 and matched with multiple air inlets 112 to form an effective blocking effect on the sand and wind entering from multiple air inlets 112 at the same time, while at the same time the heat generated by the circuit breaker body 20 during operation can be effectively dissipated in real time through multiple air inlets 112.

[0090] Combination Figure 1 and Figure 4 As is easy to understand, the heat generated by the circuit breaker body 20 during operation can first enter the mounting cavity 111 with the airflow, and then flow into the air inlet 112 through the heat dissipation gap 14 between the first sand baffle 12 and the second sand baffle 13, and finally be discharged from the air inlet 112 to the outside of the windproof sandproof component 10, thereby achieving heat dissipation and cooling of the circuit breaker 100.

[0091] Please continue reading. Figure 4 Based on the above embodiments, in the direction of sand ingress, a second sand-blocking plate 13 and two adjacent first sand-blocking plates 12 are arranged with their projections at least partially overlapping with the air inlet 112. This allows the first sand-blocking plates 12 and 13 to not only block some sand flowing in along the axial direction of the air inlet 112, but also, thanks to the staggered arrangement of their at least partially overlapping projections, to effectively block some sand entering obliquely from the air inlet 112. This ensures reliable blocking of sand entering from different angles and directions through the air inlet 112, improving the sand-blocking efficiency of the sand-blocking component 10.

[0092] For example, in one embodiment of this application, a first sand-blocking plate 12 is disposed between two adjacent air inlets 112, and a portion of the first sand-blocking plate 12 blocks a portion of one of the air inlets 112, while another portion of the second sand-blocking plate 13 blocks a portion of the other air inlet 112. In this way, the first sand-blocking plate 12 can simultaneously block some of the wind and sand entering through the two adjacent air inlets 112, improving the wind and sand protection capability of a single first sand-blocking plate 12, while reducing the number of first sand-blocking plates 12, simplifying the overall structure of the wind and sand protection component 10, and reducing manufacturing costs.

[0093] It should be noted that the first sand-blocking plate 12 blocks the sand flowing into the air inlet 112 mainly by extending the first sand-blocking plate 12 radially towards the center of the air inlet 112, so that the extended part overlaps and blocks the air inlet 112 opening along the axial direction of the air inlet 112. However, it should be emphasized that the length of the blocking part of the first sand-blocking plate 12 extending towards the openings of two adjacent air inlets 112 can be equal or unequal, and can be flexibly selected according to actual needs.

[0094] Please continue reading. Figure 3 and Figure 4 Specifically, in an optional embodiment of this application, the first sand baffle 12 includes a first rib 121 and a first plate 122. At least one of the first rib 121 and the first plate 122 is disposed on the mounting bracket 11, and the first rib 121 is connected to the first plate 122. The first rib 121 is located between the air inlet 112 and the first plate 122, so that the first plate 122 and the air inlet 112 are spaced apart.

[0095] By setting at least one of the first rib 121 and the first plate 122 on the mounting bracket 11, and connecting the first rib 121 to the first plate 122, the first sand-blocking plate 12 can be installed securely and reliably on the mounting bracket 11. The first rib 121 can serve as the skeleton of the first plate 122, enhancing the strength and stability of the first plate 122, and ensuring that the first plate 122 is not easily deformed, cracked, or even detached when subjected to long-term impacts from wind and sand.

[0096] In addition, since the first rib 121 has a certain thickness, it can support the first plate 122 and the opening of the air inlet 112 to form a certain size of interval, so as to avoid the sand and gravel that are blocked from accumulating in the air inlet 112 due to the close distance, causing the air inlet 112 to be blocked.

[0097] Optionally, in this application, the first rib 121, the first plate 122, and the mounting bracket 11 are integrally formed to ensure excellent overall structural performance and durability. Of course, in other optional embodiments, at least two of the first rib 121, the first plate 122, and the mounting bracket 11 are detachably connected. The connection method is, for example, but not limited to, screw connection, snap-fit ​​connection, adhesive connection, magnetic connection, etc., and can be flexibly selected according to actual needs.

[0098] Furthermore, based on the above embodiment, the first plate 122 is a first arc plate, with the concave side of the arc plate facing the air inlet 112. In this way, when the sand entering from the air inlet 112 is blocked by the first arc plate, the concave side of the arc plate has the effect of blocking and gathering the sand, effectively preventing the sand from splashing to the side and breaking away from the obstruction of the first arc plate, thus improving the sand-proof capability of the first sand-blocking plate 12.

[0099] Please continue reading. Figure 3 and Figure 4 In another embodiment, the second sand baffle 13 includes a second rib 131 and a second plate 132. At least one of the second rib 131 and the second plate 132 is disposed on the mounting bracket 11, and the second rib 131 is connected to the second plate 132. The second rib 131 is located between the air inlet 112 and the second plate 132, and the second plate 132 is aligned with the air inlet 112.

[0100] By setting at least one of the second rib 131 and the second plate 132 on the mounting bracket 11, and connecting the second rib 131 and the second plate 132, the second sand-blocking plate 13 can be installed securely and reliably on the mounting bracket 11. The second rib 131 can serve as the skeleton of the second plate 132, enhancing the strength and stability of the second plate 132, and ensuring that the second plate 132 is not easily deformed, cracked, or even detached when subjected to long-term impacts from wind and sand.

[0101] In addition, considering that the second rib 131 has a certain thickness, when arranging the second plate 132, a more sufficient gap can be formed between the second plate 132 and the first plate 122, so as to avoid the problem of sand and gravel being blocked by the second plate 132 accumulating between the first plate 122 and the second plate 132 due to the distance being too close, causing blockage.

[0102] Optionally, in this application, the second rib 131, the second plate 132, and the mounting bracket 11 are integrally formed to ensure excellent overall structural performance and durability. Of course, in other optional embodiments, at least two of the second rib 131, the second plate 132, and the mounting bracket 11 are detachably connected. The connection method is, for example, but not limited to, screw connection, snap-fit ​​connection, adhesive connection, magnetic connection, etc., and can be flexibly selected according to actual needs.

[0103] Based on the above embodiment, the second plate 132 is a second arc plate, with the concave side of the arc plate facing the air inlet 112. In this way, when some sand that has passed the first sand-blocking plate 12 and is not effectively blocked moves further onto the second sand-blocking plate 13, it will be blocked by the second arc plate. At this time, the concave side of the arc plate also plays an excellent role in blocking and gathering the sand, effectively preventing the sand from splashing to the side and escaping the constraint of the second arc plate, thus improving the sand-blocking capability of the second sand-blocking plate 13.

[0104] Please continue reading. Figure 3 and Figure 8 Furthermore, based on any of the above embodiments, the mounting bracket 11 includes a main board 113, a first side plate 114, a second side plate 115, and a top plate 116. The first side plate 114 and the second side plate 115 are respectively connected to opposite sides of the main board 113 along its length. The top plate 116 is connected to the same side of the main board 113, the first side plate 114, and the second side plate 115, so that the main board 113, the first side plate 114, the second side plate 115, and the top plate 116 cooperate to form a mounting cavity 111. An air inlet 112 is formed through the main board 113.

[0105] Please continue reading. Figure 3 and Figure 8 The first side plate 114, the second side plate 115 and the top plate 116 cooperate to form a first opening 117, and the mounting cavity 111 is used to communicate with the working cavity through the first opening 117.

[0106] The main board 113, the first side plate 114, and the second side plate 115 cooperate to form a second opening 118. The second opening 118 is connected to the mounting cavity 111. When the windproof and sandproof component 10 is in the installation and use state, the second opening 118 is at the bottom and the main board 113 is located on the back side of the circuit breaker body 20.

[0107] Therefore, the mounting bracket 11 is formed by connecting and cooperating the main board 113, the first side plate 114, the second side plate 115, and the top plate 116 to form a semi-enclosed box. This structure is simple, easy to process and form, and reduces manufacturing costs. During use, when installed on the circuit breaker body 20, the main board 113 can block wind and sand coming from the back side of the circuit breaker 100, while the first side plate 114, the second side plate 115, and the top plate 116 can block wind and sand coming from the side and above, respectively. This ensures that the wind and sand protection component 10 has the ability to protect against wind and sand from different directions.

[0108] The air inlet 112, the mounting cavity 111, and the first opening 117 form a passageway that connects with the working cavity. This allows sand and dust to enter the mounting cavity 111 and be effectively blocked by the first sand baffle 12 and the second sand baffle 13. At the same time, when the circuit breaker 100 is working, the heat accumulated in the working cavity enters the heat dissipation channel through the first opening 117 and is then discharged from the air inlet 112, thus meeting the high-efficiency heat dissipation requirements of the circuit breaker 100.

[0109] When the sand is blocked by the first sand-blocking plate 12 and the second sand-blocking plate 13, the sand and gravel can be discharged from the second opening 118 at the bottom of the sand-proof component 10, so as to avoid the sand and gravel accumulating inside the installation cavity 111 and affecting the sand-proof and heat dissipation capabilities of the sand-proof component 10.

[0110] Alternatively, in order to enable the sand-proof component 10 to resist sand entering the sand-proof component 10 from the second opening 118 at the bottom due to the action of rising airflow, in another embodiment, the mounting bracket 11 further includes a first additional plate (not shown in the figure), which is disposed on the first sand-blocking plate 12 and located at the second opening 118; or / and, the mounting bracket 11 further includes a second additional plate (not shown in the figure), which is disposed on the second sand-blocking plate 13 and located at the second opening 118.

[0111] That is, the first and / or second auxiliary plates installed on the first and / or second sand-blocking plates 12 and / or 13 near the second opening 118 can shield the second opening 118 to achieve wind and sand protection directly below. At the same time, the sand and gravel that fall due to being blocked by the first and second sand-blocking plates 12 and 13 accumulate on the first and / or second auxiliary plates, and can then slide off the first and / or second auxiliary plates under their own weight, achieving a sand removal effect.

[0112] Furthermore, the first and second additional plates are set at an angle so that the sand and gravel falling onto the first and / or second additional plates can slide directly off the first and / or second additional plates under their own weight, thereby improving the sand removal efficiency and preventing some sand and gravel from accumulating and solidifying in humid environments and being unable to fall off the first and / or second additional plates.

[0113] Optionally, in this application, both the first and second auxiliary plates are provided and are detachable. This facilitates regular disassembly and cleaning, or replacement of damaged parts.

[0114] Please continue reading. Figure 3 and Figure 8 In addition, in order to assemble and fix the windproof sandproof component 10 onto the arc-extinguishing cover 21 of the circuit breaker body 20, in one embodiment, the mounting bracket 11 further includes a first mounting plate 119, which is connected to the first side plate 114 and has a first connecting portion 1191 for assembly connection with the circuit breaker body 20; or / and, the mounting bracket 11 further includes a second mounting plate 119a, which is connected to the second side plate 115 and has a second connecting portion 1191a for assembly connection with the circuit breaker body 20.

[0115] More specifically, to improve the stability of the installation of the sandstorm protection component 10, the first side plate 114 and the second side plate 115 are provided simultaneously in this application. For example, the first connecting part 1191 and the second connecting part 1191a are both through holes, and the arc suppression cover 21 is provided with a threaded hole that aligns with the through hole. By using threaded components such as screws to pass through the through hole and then screw them into the threaded hole, the sandstorm protection component 10 can be threadedly installed onto the arc suppression cover 21.

[0116] Of course, in other optional embodiments, the first mounting plate 119 and the second mounting plate 119a can also be assembled and fixed with the arc suppression cover 21 by means of snap-fit ​​connection, adhesive, magnetic connection, etc. The specific choice can be made flexibly according to actual needs, and will not be elaborated in detail here.

[0117] Please continue reading. Figure 4 , Figure 8 and Figure 9 Furthermore, based on any of the above embodiments, a sand-blocking ring 15 is protruding from the outer side of the motherboard 113 away from the mounting cavity 111, and the sand-blocking ring 15 is correspondingly arranged with the air inlet 112. The protruding sand-blocking ring 15 has the function of blocking and interfering with the wind and sand flowing towards the air inlet 112, so as to reduce the actual amount of wind and sand flowing into the air inlet 112 and reduce the wind and sand protection load of the wind and sand protection component 10.

[0118] As described above, in order to effectively block the sand and dust entering through the multiple air inlets 112, it is necessary to simultaneously install multiple first sand-blocking plates 12 and multiple second sand-blocking plates 13. For example, in this application, a total of five first sand-blocking plates 12 are installed on the inner side of the main board 113, and the five first sand-blocking plates 12 are arranged side by side at intervals along the length direction of the mounting bracket 11 (that is, intersecting with the direction of sand and dust entry). One end of the first sand-blocking plate 12 is connected to the inner side of the top plate 116, and the other end extends to the second opening 118 and is flush with the second opening 118.

[0119] In addition, six second sand-blocking plates 13 are provided on the inner side of the top plate 116, and the end of the second sand-blocking plate 13 away from the top plate 116 extends to the second opening 118 and is flush with the second opening 118. The six second sand-blocking plates 13 are arranged side by side at intervals along the length of the mounting bracket 11.

[0120] Please continue reading. Figure 3 and Figure 4 Because the first sand-blocking plate 12 is positioned closer to the air inlet 112 than the second sand-blocking plate 13, it serves as the first line of defense against sand and dust flowing in from the air inlet 112. However, in reality, the two first sand-blocking plates 12 closest to the first side plate 114 and the second side plate 115 can only block a small portion of the two air inlets 112 closest to the first side plate 114 and the second side plate 115, thus affecting the sand and dust prevention effect. This may result in some sand and dust entering through the two outermost air inlets 112, bypassing the second sand-blocking plate 13, and entering the arc-extinguishing chamber 22 and the conductive system 23, affecting the operational safety, reliability, and insulation performance of the circuit breaker body 20.

[0121] Please continue reading. Figure 5 and Figure 6 Therefore, in an optional embodiment, the sand-proof assembly 10 further includes a third sand-blocking plate 16, which is mounted on the inner side of the main board 113 that forms the mounting cavity 111 and is arranged near the first side plate 114; the third sand-blocking plate 16 is used to block the portion of an air inlet 112 that is closest to the first side plate 114. Or / and, the sand-proof assembly 10 further includes a fourth sand-blocking plate 17, which is mounted on the inner side of the main board 113 that forms the mounting cavity 111 and is arranged near the second side plate 115; the fourth sand-blocking plate 17 is used to block the portion of an air inlet 112 that is closest to the second side plate 115.

[0122] For example, this application adopts a scheme of simultaneously setting a third sand-blocking plate 16 and a fourth sand-blocking plate 17. This allows the sand entering from the two outermost air inlets 112 along the length of the mounting bracket 11 to be blocked by the first sand-blocking plate 12, the third sand-blocking plate 16, and the fourth sand-blocking plate 17, thus achieving the effect of blocking more sand and gravel. The second sand-blocking plate 13, arranged between the first sand-blocking plate 12 and the third sand-blocking plate 16 and between the first sand-blocking plate 12 and the fourth sand-blocking plate 17, can form a secondary barrier for the remaining sand and wind passing through the gap between the first sand-blocking plate 12 and the third sand-blocking plate 16 and between the first sand-blocking plate 12 and the fourth sand-blocking plate 17, thus achieving the effect of effectively blocking all the sand and wind entering from the air inlets 112.

[0123] It is necessary to explain that the third sand-blocking plate 16 and the fourth sand-blocking plate 17 adopt a structural design that is basically the same as that of the first sand-blocking plate 12 and the second sand-blocking plate 13, that is, they all include connected ribs and arc-shaped plates. The only difference is that the arc-shaped plate is not a symmetrical structure with the center line of the rib as the center of symmetry, but is just a semi-arc plate that extends radially toward the air inlet 112. While meeting the requirement of partially blocking wind and sand at the air inlet 112, it can also save manufacturing materials and eliminate redundant unnecessary structures (if the arc-shaped plates of the third sand-blocking plate 16 and the fourth sand-blocking plate 17 still extend a part of the semi-arc plate toward the first side plate 114 and the second side plate 115, then this part of the semi-arc plate can no longer play a role in blocking the wind and sand flowing into the air inlet 112, that is, it becomes an unnecessary redundant structure).

[0124] Please continue reading. Figures 6 to 13 In addition, based on any of the above embodiments, the wind and sand protection component 10 also includes a first reinforcing baffle 18, which is installed in the mounting cavity 111 and is located between the first sand-blocking plate 12 and the second sand-blocking plate 13 along the wind and sand entry direction.

[0125] Please continue reading. Figure 11 and Figure 12 The first reinforcing baffle 18 is provided with a first through hole 181 and a first blocking part 182. The first blocking part 182 is used to block some of the wind and sand entering from the air inlet 112. The first through hole 181 is connected to the heat dissipation channel.

[0126] Therefore, the first blocking portion 182 formed on the first reinforcing baffle 18 can pre-block some of the wind and sand crossing the gap between two adjacent first sand-blocking plates 12 before reaching the second sand-blocking plate 13. This helps the first sand-blocking plate 12 to block more sand and gravel, improves the wind and sand prevention efficiency, and reduces the wind and sand blocking burden on the second sand-blocking plate 13. In addition, the first through hole 181 formed on the first reinforcing baffle 18 can also communicate with the heat dissipation channel, ensuring that the heat generated inside the circuit breaker body 20 during operation can be smoothly discharged through the heat dissipation channel, so that the wind and sand prevention component 10 has both excellent wind and sand prevention and heat dissipation performance.

[0127] Furthermore, in order to adapt to the structural configuration of multiple air inlets 112, multiple first sand baffles 12 and multiple second sand baffles 13, and to ensure that the sand-proof component 10 still has reliable sand-proof capability, in one embodiment, multiple first through holes 181 and multiple first blocking parts 182 are provided, and the first through holes 181 and the first blocking parts 182 are arranged alternately. Along the direction of sand entry, the first sand baffles 12 are arranged in a one-to-one correspondence with the first through holes 181, and the first blocking parts 182, the air inlets 112 and the second sand baffles 13 are arranged in a one-to-one correspondence.

[0128] With this configuration, the sand entering through each air inlet 112 is blocked by three levels of barriers: the first sand-blocking plate 12, the first blocking part 182, and the second sand-blocking plate 13, achieving a highly efficient sand-blocking effect. Furthermore, each air inlet 112, equipped with two first sand-blocking plates 12 on the left and right, and a first blocking part 182 and a third sand-blocking plate 16 located between the two first sand-blocking plates 12, can effectively and completely block sand entering from any angle of inclination of the air inlet 112.

[0129] Please continue reading. Figure 3 and Figure 12 In order to install and fix the first reinforcing baffle 18 in the mounting cavity 111 of the mounting bracket 11, in one embodiment, the first reinforcing baffle 18 is provided with a first mounting part 183, and the mounting bracket 11 is provided with a first mating part 119b. The first mounting part 183 is connected to the first mating part 119b so that the first reinforcing baffle 18 is assembled and fixed with the mounting bracket 11.

[0130] More specifically, in one embodiment, one of the first mounting part 183 and the first mating part 119b is configured as a first hook 183a, and the other of the first mounting part 183 and the first mating part 119b is configured as a first slot 1191b, with the first hook 183a engaging with the first slot 1191b. Therefore, by engaging the first hook 183a into the first slot 1191b, the first reinforcing baffle 18 can be mounted in the mounting bracket 11, resulting in simple installation and disassembly methods and high connection strength and reliability.

[0131] Furthermore, more than one first hook 183a and first slot 1191b can be provided. Specifically, two first slots 1191b are provided on both the first side plate 114 and the second side plate 115, and two first hooks 183a are provided at opposite ends of the length direction of the first reinforcing baffle 18. When the first reinforcing baffle 18 is pushed into the mounting cavity 111 from the second opening 118, the two first hooks 183a at both ends of the length direction of the first reinforcing baffle 18 respectively engage with the two first slots 1191b on the first side plate 114 and the second side plate 115. This is to improve the assembly strength and stability of the first reinforcing baffle 18 and the mounting bracket 11.

[0132] Of course, in some other alternative embodiments, the first reinforcing baffle 18 and the mounting bracket 11 can also be connected by at least one of the following methods: screwing, bonding, magnetic connection, etc. The specific method can be flexibly selected according to actual needs.

[0133] Please continue reading. Figures 8 to 10 ,as well as Figure 13 Furthermore, based on any of the above embodiments, the wind and sand protection component 10 also includes a second reinforcing baffle 19, which is installed in the mounting cavity 111 and is located on the side of the second sand-blocking plate 13 away from the first sand-blocking plate 12 along the wind and sand entry direction.

[0134] The second reinforcing baffle 19 is provided with a second through hole 191 and a second blocking part 192. The second blocking part 192 is used to block part of the wind and sand that enters from the air inlet 112 at the maximum tilt angle. The second through hole 191 is connected to the heat dissipation channel.

[0135] In special circumstances, some of the sand entering through the air inlet 112 at the maximum angle of inclination cannot be blocked by the first sand-blocking plate 12, the first blocking part 182, and the second sand-blocking plate 13. This sand passes through the gap between the first sand-blocking plate 12 and the first blocking part 182 and the gap between the first sand-blocking plate 12 and the second sand-blocking plate 13 in sequence and finally reaches the second reinforcing baffle 19. Then it can be blocked by the second blocking part 192, thus constructing the last effective line of defense to completely block all the sand entering through the air inlet 112 and improve the sand-proof reliability of the sand-proof component 10.

[0136] In addition, the second through hole 191 formed on the second reinforcing baffle 19 can also be connected to the heat dissipation channel, ensuring that the heat generated inside the circuit breaker body 20 during operation can be smoothly discharged from the heat dissipation channel, so that the windproof and sandproof component 10 has both excellent windproof and sandproof performance and heat dissipation performance.

[0137] Furthermore, in order to adapt to the structural configuration of multiple air inlets 112, multiple first sand baffles 12, multiple second sand baffles 13, and a first reinforcing baffle 18, and to ensure that the wind and sand protection component 10 still has reliable wind and sand protection capabilities, in one embodiment, multiple second through holes 191 and second blocking parts 192 are provided, and the second through holes 191 and second blocking parts 192 are arranged alternately. Along the direction of wind and sand entry, the second through holes 191, second sand baffles 13, and air inlets 112 are arranged in a one-to-one correspondence, and the second blocking parts 192 are arranged in a one-to-one correspondence with the first sand baffles 12.

[0138] With this configuration, the sand entering through each air inlet 112 is blocked by four levels of barriers: the first sand-blocking plate 12, the first blocking part 182, the second sand-blocking plate 13, and the second blocking part 192, achieving a highly efficient sand-blocking effect. Furthermore, each air inlet 112 is equipped with two first sand-blocking plates 12 on the left and right, a first blocking part 182 and a third sand-blocking plate 16 located between the two first sand-blocking plates 12, and a second blocking part 192 located between two adjacent second sand-blocking plates 13 and aligned with the first through-hole 181 and the first sand-blocking plate 12. This configuration effectively and completely blocks sand entering from any angle of inclination (including the maximum angle of inclination) through the air inlet 112.

[0139] Please continue reading. Figure 3 and Figure 13 In order to install and fix the second reinforcing baffle 19 in the mounting cavity 111 of the mounting bracket 11, in one embodiment, the second reinforcing baffle 19 is provided with a second mounting part 193, and the mounting bracket 11 is provided with a second mating part 119c. The second mounting part 193 is connected to the second mating part 119c so that the second reinforcing baffle 19 is assembled and fixed with the mounting bracket 11.

[0140] More specifically, in one embodiment, one of the second mounting portion 193 and the second mating portion 119c is configured as a second hook 193a, and the other of the second mounting portion 193 and the second mating portion 119c is configured as a second slot 1191c, with the second hook 193a engaging with the second slot 1191c. Therefore, by engaging the second hook 193a within the second slot 1191c, the second reinforcing baffle 19 can be mounted in the mounting bracket 11, resulting in simple installation and disassembly, and high connection strength and reliability.

[0141] Furthermore, more than one second hook 193a and second slot 1191c can be provided. Specifically, two second slots 1191c are provided on both the first side plate 114 and the second side plate 115, and two second hooks 193a are provided at opposite ends of the length direction of the second reinforcing baffle 19. When the second reinforcing baffle 19 is pushed into the mounting cavity 111 from the second opening 118, the two second hooks 193a at both ends of the length direction of the second reinforcing baffle 19 respectively engage with the two second slots 1191c on the first side plate 114 and the second side plate 115. This is to improve the assembly strength and stability of the second reinforcing baffle 19 and the mounting bracket 11.

[0142] Of course, in some other alternative embodiments, the second reinforcing baffle 19 and the mounting bracket 11 can also be connected by at least one of the following methods: screwing, bonding, magnetic connection, etc. The specific method can be flexibly selected according to actual needs.

[0143] It should be noted that the sand and dust entering through the air inlet 112 in this application are... Figure 5 and Figure 11 As shown by the solid arrow in the image. Sandstorms entering at the maximum angle of inclination... Figure 11 The dashed arrow in the diagram shows the flow path of heat dissipation from the heat dissipation channel. Figure 11 The curved arrow in the image is shown.

[0144] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0145] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A windbreak and sand-proof component, characterized in that, include: The mounting bracket is used to install on electrical equipment with an air outlet. The mounting bracket has a connected mounting cavity and an air inlet. The mounting cavity is used to communicate with the working cavity of the electrical equipment through the air outlet. The direction from the air inlet to the mounting cavity is set as the direction of wind and sand entry. A first sand-blocking plate and a second sand-blocking plate are arranged side-by-side at intervals in the mounting cavity along the direction in which the sand enters. The first sand-blocking plate and the second sand-blocking plate are staggered along a direction intersecting the direction in which the sand enters. In the direction in which the sand enters, the sum of the projected areas of the first sand-blocking plate and the second sand-blocking plate completely covers the air inlet, so that the first sand-blocking plate and the second sand-blocking plate can work together to block the sand entering through the air inlet from passing through the mounting cavity and entering the working cavity. The first sand baffle and the second sand baffle form a heat dissipation gap. The heat dissipation gap, the mounting cavity and the air inlet are connected to form a heat dissipation channel arranged from the mounting cavity to the air inlet. The heat dissipation channel is used to dissipate heat from the working cavity.

2. The wind and sand protection component according to claim 1, characterized in that, The first sand-blocking plate and the second sand-blocking plate are partially overlapped in the direction in which the sand enters.

3. The wind and sand protection component according to claim 1, characterized in that, The air inlet is provided in multiple ways, and the multiple air inlets are distributed at intervals on the same side of the mounting bracket; Multiple first and second sand-blocking plates are provided. The multiple first and second sand-blocking plates are arranged side by side and spaced apart in the mounting cavity along the direction of sand and wind entry. The multiple first and second sand-blocking plates are also arranged side by side and spaced apart perpendicular to the direction of sand and wind entry. Two first sand-blocking plates are distributed at intervals on both radially opposite sides of any air inlet, and the two first sand-blocking plates cover the first part of the air inlet. A second sand-blocking plate is arranged between two adjacent first sand-blocking plates. The second sand-blocking plate is arranged one-to-one with the air inlet and covers the second part of the air inlet. The sum of the first part and the second part is the entire air inlet.

4. The wind and sand protection component according to claim 3, characterized in that, In the direction in which the sand enters, the projections of one second sand-blocking plate and two adjacent first sand-blocking plates overlap at least partially with the projections of the air inlet.

5. The wind and sand protection component according to claim 3, characterized in that, The first sand baffle is disposed between two adjacent air inlets, and a portion of the first sand baffle blocks part of one of the air inlets, while another portion of the second sand baffle blocks part of the other air inlet.

6. The wind and sand protection component according to claim 1, characterized in that, The first sand baffle includes a first rib and a first plate. At least one of the first rib and the first plate is disposed on the mounting bracket, and the first rib is connected to the first plate. The first rib is located between the air inlet and the first plate, so that the first plate and the air inlet are spaced apart. The second sand baffle includes a second rib and a second plate. At least one of the second rib and the second plate is disposed on the mounting bracket, and the second rib is connected to the second plate. The second rib is located between the air inlet and the second plate, and the second plate is aligned with the air inlet.

7. The wind and sand protection component according to claim 6, characterized in that, The first plate is a first arc plate, and the arc-shaped concave side of the first arc plate is oriented toward the air inlet hole; The second plate is a second arc plate, and the concave side of the second arc plate is oriented toward the air inlet.

8. The wind and sand protection component according to claim 1, characterized in that, The mounting bracket includes a motherboard, a first side plate, a second side plate, and a top plate. The first side plate and the second side plate are respectively connected to opposite sides of the motherboard along its length. The top plate is connected to the motherboard, the first side plate, and the second side plate on the same side, so that the motherboard, the first side plate, the second side plate, and the top plate cooperate to form the mounting cavity. The air inlet is formed through the motherboard. The first side plate, the second side plate, and the top plate cooperate to form a first opening, and the mounting cavity is used to communicate with the air outlet through the first opening; The motherboard, the first side plate, and the second side plate cooperate to form a second opening. The second opening communicates with the mounting cavity. When the windproof and sandproof component is in the installation and use state, the second opening is at the bottom, and the motherboard is located on the back side of the electrical device.

9. The wind and sand protection component according to claim 8, characterized in that, The mounting bracket also includes a first additional plate, which is disposed on the first sand baffle and located in the second opening; Or / and, the mounting bracket further includes a second additional plate, which is disposed on the second sand baffle plate in the second open arrangement.

10. The wind and sand protection component according to claim 8, characterized in that, The mounting bracket further includes a first mounting plate, which is connected to the first side plate, and the first mounting plate is provided with a first connecting part for assembly and connection with the circuit breaker body. Or / and, the mounting bracket further includes a second mounting plate, the second mounting plate being connected to the second side plate, and the second mounting plate having a second connecting portion for assembly connection with the circuit breaker body.

11. The wind and sand protection component according to claim 8, characterized in that, A sand-blocking ring is formed protruding on the outer side of the motherboard away from the mounting cavity, and the sand-blocking ring is arranged corresponding to the air inlet.

12. The wind and sand protection component according to claim 8, characterized in that, The wind and sand protection component also includes a third sand baffle plate, which is installed on the inner side of the main board that forms the mounting cavity and is arranged close to the first side plate; the third sand baffle plate is used to block the portion of the air inlet closest to the first side plate. Or / and, the windproof sandproof assembly further includes a fourth sand-blocking plate, which is installed on the inner side of the main board for forming the mounting cavity and is arranged close to the second side plate; the fourth sand-blocking plate is used to block the portion of one of the air inlets closest to the second side plate.

13. The wind and sand protection component according to claim 1, characterized in that, The wind and sand protection component also includes a first reinforcing baffle, which is installed in the mounting cavity and positioned between the first sand-blocking plate and the second sand-blocking plate along the wind and sand entry direction. The first reinforcing baffle is provided with a first through hole and a first blocking part. The first blocking part is used to block some of the wind and sand entering from the air inlet. The first through hole is connected to the heat dissipation channel.

14. The windproof and sand-proof component according to claim 13, characterized in that, Multiple first through holes and first blocking parts are provided, and the first through holes and the first blocking parts are arranged alternately. Along the direction of wind and sand entry, the first sand baffle is arranged in a corresponding manner to the first through hole, and the first blocking part, the air inlet hole and the second sand baffle are arranged in a corresponding manner.

15. The wind and sand protection component according to claim 13, characterized in that, The first reinforcing baffle is provided with a first mounting part, and the mounting bracket is provided with a first mating part. The first mounting part is connected to the first mating part so that the first reinforcing baffle is assembled and fixed with the mounting bracket.

16. The wind and sand protection component according to claim 15, characterized in that, One of the first mounting part and the first mating part is configured as a first hook, and the other of the first mounting part and the first mating part is configured as a first slot, and the first hook engages with the first slot.

17. The windproof and sand-proof component according to claim 1 or 13, characterized in that, The wind and sand protection component also includes a second reinforcing baffle, which is installed in the mounting cavity and is located on the side of the second baffle away from the first baffle along the wind and sand entry direction; The second reinforcing baffle is provided with a second through hole and a second blocking part. The second blocking part is used to block part of the wind and sand that enters from the air inlet at the maximum tilt angle. The second through hole is connected to the heat dissipation channel.

18. The wind and sand protection component according to claim 17, characterized in that, Multiple second through holes and second blocking parts are provided, and the second through holes and the second blocking parts are arranged alternately. Along the direction of wind and sand entry, the second through holes, the second sand baffle and the air inlet are arranged in a corresponding manner, and the second blocking parts are arranged in a corresponding manner with the first sand baffle.

19. The windproof and sand-proof component according to claim 18, characterized in that, The second reinforcing baffle is provided with a second mounting part, and the mounting bracket is provided with a second mating part. The second mounting part is connected to the second mating part so that the second reinforcing baffle is assembled and fixed with the mounting bracket.

20. The windproof and sand-proof component according to claim 19, characterized in that, One of the second mounting part and the second mating part is configured as a second hook, and the other of the second mounting part and the second mating part is configured as a second slot, and the second hook engages with the second slot.

21. A circuit breaker, characterized in that, include: The circuit breaker body has an arc-suppressing cover; The wind and sand protection component as described in any one of claims 1 to 20, wherein the wind and sand protection component is installed on the arc suppression cover.

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