Exhaust assembly and circuit breaker
By designing multi-channel exhaust components in the circuit breaker, the problem of pressure increase in the arc extinguishing chamber is solved, the shell and parts are protected, and the reliability and safety of the circuit breaker are improved.
Patent Information
- Application Number
- CN202422390227.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-29
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-09-29
AI Technical Summary
During the disconnection operation of traditional circuit breakers, the pressure in the arc extinguishing chamber increases significantly, resulting in damage to the arc extinguishing chamber and the internal structure of the switching device, affecting reliability and safety.
A multi-channel exhaust assembly is designed, including a first exhaust passage, a second exhaust passage and a pressure balance passage, and multiple channels are formed through the partition plate and the arc plate to break the arc pressure, realize multi-channel pressure relief and reduce internal pressure.
Significantly reduce or even eliminate structural damage to the shell and parts by high-pressure gas or arc, and improve the reliability and safety of switching devices.
Smart Images
Figure CN223140709U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of low-voltage electrical appliances, and particularly to an exhaust assembly and a circuit breaker. Background Art
[0002] In traditional switching devices, they are usually used to control and protect electrical circuits, such as circuit breakers. A circuit breaker can connect and disconnect a circuit under normal conditions, and at the same time quickly cut off the current in case of a fault or abnormal situation to prevent equipment damage and ensure personal safety.
[0003] However, a circuit breaker usually has a single exhaust port. When the circuit breaker performs a breaking operation, the pressure in the arc extinguishing chamber will increase significantly. This high-pressure state will have a greater impact on the arc extinguishing chamber itself and the internal structure of the entire switching device. Summary of the Utility Model
[0004] This application provides an exhaust assembly and a circuit breaker, which can reduce the internal pressure of the arc extinguishing chamber and the corresponding switching device product through multi-channel pressure relief. Reduce or even eliminate structural damage to the housing and parts caused by high-pressure gas or electric arcs.
[0005] In a first aspect, this application provides an exhaust assembly, which is arranged on a switching device. The switching device includes a housing, an arc extinguishing chamber arranged in the housing, and at least one terminal arranged on the exhaust side of the arc extinguishing chamber. The exhaust assembly includes a first exhaust channel, a second exhaust channel, and a pressure balance channel.
[0006] The first exhaust channel is communicated with the exhaust side of the arc extinguishing chamber. At least one partition is arranged in the housing. The partition and the inner wall of the housing enclose the first exhaust channel, and at least one exhaust outlet adapted to the first exhaust channel is opened on the housing.
[0007] The second exhaust channel is arranged between the terminal and the inner wall of the housing. The first end of the second exhaust channel is communicated with the exhaust side of the arc extinguishing chamber, and the second end of the second exhaust channel is communicated with the wiring hole corresponding to the terminal.
[0008] The pressure balance channel is arranged on the arcing side of the arc extinguishing chamber. On the arcing side of the arc extinguishing chamber, there is an arc running channel formed by enclosing two arc separating plates. The pressure balance channel is arranged at an interval from the arc running channel through the arc separating plate and is communicated with the arc extinguishing chamber.
[0009] The first exhaust channel is directly communicated with the exhaust side of the arc extinguishing chamber. To form this channel, one or more partitions are specially arranged inside the housing. These partitions and the inner wall of the housing jointly enclose the space of the first exhaust channel. In addition, at least one exhaust outlet adapted to the first exhaust channel is also opened on the housing to facilitate the smooth discharge of gas.
[0010] The second exhaust channel is cleverly arranged between the terminal and the inner wall of the housing. The first end of this channel is connected to the exhaust side of the arc extinguishing chamber, and the second end is connected to the wiring hole corresponding to the terminal. This design ensures that when an arc is generated, the gas can be discharged smoothly through this channel, thereby reducing the internal pressure.
[0011] The pressure balance channel is set on the arc-initiating side of the arc-extinguishing chamber. On the arc-initiating side of the arc-extinguishing chamber, two arc-isolating plates are used to form an arc-running track. The pressure balance channel is separated from the arc-running track by the arc-isolating plates and is connected to the inside of the arc-extinguishing chamber. This design helps to achieve pressure balance through the pressure balance channel when an arc is generated, thereby further reducing the pressure inside the arc-extinguishing chamber and the corresponding switch device products.
[0012] The above three-channel design can effectively break the arc pressure, which helps to reduce the internal pressure of the arc extinguishing chamber and the corresponding switch device products through multi-channel pressure relief. This design significantly reduces or even eliminates the structural damage to the housing and parts caused by high-pressure gas or arc, thereby improving the overall reliability and safety of the switch device.
[0013] In some examples, the pressure balance channel is arranged on the side of the arc isolation plate away from the arc track, and two arc isolation plates correspond to one pressure balance channel respectively. Alternatively, the pressure balance channel is opened in the arc isolation plate.
[0014] The pressure balance channel in the above structure of the present application can be set on the back side of the arc isolation plate, that is, the side of the arc isolation plate away from the arc track. In this case, each arc isolation plate corresponds to an independent pressure balance channel. Another possible design is to open the pressure balance channel directly on the arc isolation plate. These two structures show different ways to set the pressure balance channel, and the specific choice can be determined according to actual needs and design requirements.
[0015] In some examples, a placement groove for installing a magnetic conductive component is provided on the side of the arc isolation plate facing away from the arc track, a pressure balance air inlet is provided on the wall of the placement groove close to the arc extinguishing chamber, and a pressure balance air outlet is provided on the wall of the placement groove facing away from the arc extinguishing chamber.
[0016] The placement groove, the pressure balance air inlet and the pressure balance air outlet cooperate to form a pressure balance channel.
[0017] Two partition arc plates can enclose an arc running path. The two partition arc plates can be integrally arranged, or they can be separately arranged and spaced from each other to form the above-mentioned arc running path. On the side of the partition arc plate facing away from the arc running path, there is a placement groove for installing a magnetic conductive member. A pressure balance air inlet is opened on the wall surface of the placement groove close to the arc extinguishing chamber. The pressure balance air inlet here can achieve better pressure balance for the high-pressure gas in the arc extinguishing chamber. The pressure balance air inlet allows gas to enter the placement groove from the arc extinguishing chamber, which helps to maintain the stability of pressure during the arc extinguishing process. In addition, a pressure balance air outlet is also opened on the wall surface of the placement groove facing away from the arc extinguishing chamber. The pressure balance air outlet allows gas to be discharged from the placement groove, further ensuring pressure balance.
[0018] In this way, the placement groove, the pressure balance air inlet and the pressure balance air outlet cooperate together to form a complete pressure balance channel. The pressure balance channel plays a crucial role in the arc extinguishing process, ensuring that the pressure inside the arc extinguishing chamber can be effectively regulated and controlled, thereby improving the arc extinguishing efficiency and the overall performance of the switching device.
[0019] In some examples, there are at least two pressure balance air inlets and pressure balance air outlets, which form a grid structure.
[0020] Specifically, both the pressure balance air inlet and the pressure balance air outlet can be set to include at least two openings arranged side by side. These openings together form a grid-like structure. Through this design, each opening can effectively share the pressure, so that the overall pressure relief capacity is further improved. In addition, due to the existence of multiple openings, the pressure distribution of the entire arc extinguishing system is more uniform, further enhancing stability and reliability. Such a design not only improves the performance of the switching device, but also ensures the stability and safety during operation in a high-pressure environment.
[0021] In some examples, the second exhaust channel is formed by enclosing the housing and the terminal. Assembly grooves are provided on the inner walls of the housing corresponding to the terminal.
[0022] The terminal plugs the assembly groove and forms an exhaust cavity. An exhaust inlet is opened on one side of the exhaust cavity close to the arc extinguishing chamber, and the side of the exhaust cavity facing away from the arc extinguishing chamber is communicated with the wiring hole.
[0023] The second exhaust passage can be formed by the mutual cooperation of the housing and the terminal. Specifically, an assembly groove is provided on the inner wall of the housing corresponding to the terminal. After the assembly groove is engaged with the terminal, the outer wall of the wiring hole of the terminal can effectively block the assembly groove, thereby forming an exhaust cavity. The function of the exhaust cavity is to discharge the high-pressure gas generated by the arc extinguishing chamber. An exhaust inlet is provided on one side of the exhaust cavity close to the arc extinguishing chamber. Through the exhaust inlet, the gas generated inside the arc extinguishing chamber can be effectively discharged, thus ensuring the normal operation and safety of the switching device. In addition, the side of the exhaust cavity facing away from the arc extinguishing chamber is communicated with the wiring hole, so that the transmitted high-pressure gas can be discharged through the wiring hole, further ensuring the smoothness of gas discharge. The above design of the present application not only cleverly utilizes the space between the housing and the terminal, but also effectively improves the performance and safety of the entire device.
[0024] In some examples, at least one first support rib is provided on the inner side of the assembly groove, and the first support rib abuts against the outer surface of the terminal. The inner wall of the assembly groove and the outer surface of the terminal cooperate to form an exhaust cavity.
[0025] At least one first support rib is provided on the inner side portion of the assembly groove. The function of these first support ribs is to abut against and support the outer surface of the terminal, ensuring the stability and fixation of the terminal in the assembly groove. Through this design, the first support ribs on the inner wall of the assembly groove cooperate closely with the outer surface of the terminal to jointly form an effective exhaust cavity. The formation of the exhaust cavity depends on the supporting effect of the first support ribs in the assembly groove. The exhaust cavity formed in this way has higher stability, ensuring the stability of the exhaust cavity structure and the reliability of its function.
[0026] Alternatively, at least one second support rib is provided on the outer surface of the terminal described above, and the second support rib abuts against the inner wall of the assembly groove. The inner wall of the assembly groove and the outer surface of the terminal cooperate to form an exhaust cavity.
[0027] At least one second support rib can also be provided on the outer surface of the terminal. The function of these second support ribs is to abut against and support the inner wall of the assembly groove, further ensuring the stability and fixation of the terminal in the assembly groove. Through this design, the inner wall of the assembly groove cooperates with the second support ribs on the outer surface of the terminal to jointly form an effective exhaust cavity. The formation of the exhaust cavity depends on the supporting effect of the second support ribs on the outer surface of the terminal, thereby ensuring the stability of the exhaust cavity structure and the reliability of its function.
[0028] In some examples, the projection of the exhaust inlet on the wall surface facing the wiring hole is at least partially staggered with the wiring hole;
[0029] A guide plate is arranged on the shell. The guide plate is a cavity wall between the exhaust inlet and the wiring hole in the exhaust cavity. The guide plate is arranged obliquely relative to the exhaust inlet. The guide plate can guide the gas toward the wiring hole.
[0030] Based on the above example of the present application, there is a certain staggered relationship between the direction of the exhaust inlet and the projection of the wall where the wiring hole is located. Such a setting can prevent the high-pressure gas entering from the exhaust inlet from being ejected directly from the location of the wiring hole, and can be buffered by the inner wall of the shell, thereby reducing the interference of the high-pressure gas on the wall to the wiring terminal. Therefore, the above structure can effectively guide the gas flow, avoid direct impact on the wiring hole, and thus reduce the potential risk of damage.
[0031] After the guide plate is arranged in the housing, since the guide plate is located inside the exhaust cavity and is located at the cavity wall position between the exhaust inlet and the wiring hole, the gas can be effectively guided from the exhaust inlet to the direction of the wiring hole by setting the guide plate at an angle relative to the exhaust inlet. In this way, the guide plate can effectively control the gas flow path, ensuring that the gas can flow smoothly to the wiring hole. After the guide plate changes the direction of the high-pressure gas, the flow rate of the high-pressure gas can be reduced, the airflow impact can be reduced, and the overall exhaust efficiency and safety can be stabilized.
[0032] There may be tiny metal particles in the high-pressure gas flow. The setting of the guide plate can prevent the tiny metal ions from rushing out directly from the wiring hole, thereby protecting the stability of the wiring of the terminal.
[0033] In some examples, two second exhaust channels are provided, and the two second exhaust channels are respectively located on two sides of the connection terminal.
[0034] The two second exhaust channels in the present application can be two independent channels. The two second exhaust channels are respectively located on both sides of the terminal, such as the left and right sides. This layout makes the two second exhaust channels have a certain symmetry relative to the terminal. Through this symmetrical layout, it can be ensured that the two second exhaust channels can exhaust gas evenly during operation, thereby achieving a better exhaust effect. This design not only improves the exhaust efficiency, but also ensures the stability and reliability of the terminal in a high temperature environment.
[0035] In some examples, the first exhaust passage includes two exhaust branches, each exhaust branch corresponding to an exhaust outlet.
[0036] The side of the shell body away from the handle is taken as the bottom, one exhaust outlet is arranged at the bottom of the shell body, and the other exhaust outlet is arranged below the wiring hole.
[0037] The first exhaust channel may include two independent exhaust branches, each of which corresponds to a specific exhaust outlet, and specifically, these exhaust outlets can exhaust gas.
[0038] The side of the housing away from the handle is the bottom. In this setting, one of the exhaust outlets is opened at the bottom of the housing. This design ensures that the gas can be discharged smoothly from the bottom of the switch device, thereby preventing the gas from accumulating inside the switch device and affecting the normal operation of the switch device. Another exhaust outlet can be opened below the wiring hole of the housing. This layout ensures that when the switch device is connected, the exhausted gas will not cause interference or discomfort to the operator. The setting of two exhaust outlets can make the switch device have a better exhaust effect.
[0039] In some examples, an adjustable valve is provided on the exhaust outlet at the bottom of the housing.
[0040] In order to better control the gas discharge, an adjustable valve is specially set on the exhaust outlet at the bottom of the shell. By adjusting this valve, the operator can adjust the bottom gas discharge according to actual needs. This design not only improves the flexibility of the switch device, but also enhances its applicability in different working environments. In this way, the user can control the gas discharge of the bottom exhaust outlet according to actual work needs, thereby ensuring the efficient operation of the switch device and the safety of operation to a certain extent.
[0041] In a second aspect, an embodiment of the present application provides a circuit breaker, comprising an exhaust assembly and a housing as described above, wherein the exhaust assembly is disposed in the housing.
[0042] The circuit breaker with the exhaust assembly of the present application can reduce the internal pressure of the arc extinguishing chamber and the corresponding switch device product through multi-channel pressure relief, thereby reducing or even eliminating the structural damage to the housing and parts caused by high-pressure gas or arc. BRIEF DESCRIPTION OF THE DRAWINGS
[0043] In order to more clearly illustrate the technical solutions in the present application or the prior art, the drawings required for use in the examples or prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some examples of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.
[0044] Figure 1 This is a schematic diagram of the structure of a switching device such as a circuit breaker in an example of the present application.
[0045] Figure 2 It is a schematic diagram of the structural explosion of a circuit breaker in an example of the present application.
[0046] Figure 3 is Figure 2 The enlarged schematic diagram of the exhaust path of the first exhaust passage is shown at position A in
[0047] Figure 4 The exploded schematic diagram of the arc isolation plate and the third exhaust passage in an example of the present application.
[0048] Figure 5 The further exploded schematic diagram of the circuit breaker in an example of the present application.
[0049] Figure 6 is Figure 5 The enlarged schematic diagram of the exhaust paths of the first exhaust passage and the second exhaust passage is shown at position B in
[0050] Reference numerals:
[0051] 100, housing; 110, partition; 120, exhaust outlet; 130, wiring hole; 140, exhaust inlet; 150, assembly groove; 151, guide plate; 160, first support rib; 200, arc extinguishing chamber; 210, exhaust side; 220, arcing side; 300, exhaust assembly; 310, first exhaust passage; 320, second exhaust passage; 330, pressure balance passage; 400, arc isolation plate; 410, placement groove; 411, magnetic conductive member; 420, pressure balance air inlet; 430, pressure balance air outlet; 440, arcing path; 500, terminal. Detailed implementation manners
[0052] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and are not used to limit the present application.
[0053] In the related art, traditional circuit breakers usually only have a single exhaust port. When the circuit breaker performs a breaking operation, the pressure in the arc extinguishing chamber will increase significantly. This high-pressure state will have a greater impact on the arc extinguishing chamber itself and the internal structure of the entire switching device.
[0054] Due to only one exhaust port, the discharge path of the high-pressure gas is limited, which may lead to uneven pressure distribution inside the arc extinguishing chamber, thereby affecting its performance and lifespan. In addition, the impact force of the high-pressure gas may also damage other components of the switching device, thus reducing the reliability and safety of the entire product.
[0055] To solve the above technical problems, the present application proposes an exhaust component for a multi-channel arc extinguishing system of a circuit breaker arc extinguishing system. An exhaust port with multiple channels can be provided at the tail of the arc extinguishing chamber, and new exhaust channels are provided on both sides of the arc dividing plate to better balance the pressure inside the arc extinguishing chamber and reduce the damage to itself during the on-off of the product. The tail of the arc extinguishing chamber is the part that discharges high-pressure gas from the arc extinguishing chamber.
[0056] Based on the above technical solution, please refer to Figures 1-6 As shown in the figure, a first aspect of the present application proposes an exhaust component 300, which can reduce the internal pressure of the arc extinguishing chamber 200 and the corresponding switch device product through multi-channel pressure relief. Reduce or even eliminate structural damage to the housing 100 and parts caused by high-pressure gas or electric arcs.
[0057] Refer to Figure 2 and Figure 3 As shown in the figure, the exhaust component 300 is arranged on the switch device. The switch device includes a housing 100, an arc extinguishing chamber 200 arranged inside the housing 100, and at least one terminal 500 arranged on the exhaust side 210 of the arc extinguishing chamber 200. The exhaust component 300 includes a first exhaust channel 310, a second exhaust channel 320, and a pressure balance channel 330.
[0058] The first exhaust channel 310 communicates with the exhaust side 210 of the arc extinguishing chamber 200. At least one partition 110 is arranged inside the housing 100. The partition 110 and the inner wall of the housing 100 enclose the first exhaust channel 310. At least one exhaust outlet 120 adapted to the first exhaust channel 310 is provided on the housing 100.
[0059] The second exhaust channel 320 is arranged between the terminal 500 and the inner wall of the housing 100. The first end of the second exhaust channel 320 communicates with the exhaust side 210 of the arc extinguishing chamber 200, and the second end of the second exhaust channel 320 communicates with the corresponding wiring hole 130 of the terminal 500.
[0060] The pressure balance channel 330 is arranged on the arcing side 220 of the arc extinguishing chamber 200. An arcing path 440 formed by enclosing two arc dividing plates 400 is arranged on the arcing side 220 of the arc extinguishing chamber 200. The pressure balance channel 330 is arranged at an interval from the arcing path 440 through the arc dividing plate 400 and communicates with the arc extinguishing chamber 200.
[0061] The above three channels can break the generated arc pressure, which helps to reduce the internal pressure of the arc extinguishing chamber 200 and the corresponding switch device product through multi-channel pressure relief. Reduce or even eliminate structural damage to the housing 100 and parts caused by high-pressure gas or electric arcs.
[0062] Specifically, the first exhaust passage 310 is directly connected and communicated with the exhaust side 210 of the arc extinguishing chamber 200. To form this passage, one or more partition plates 110 are specially provided inside the housing 100. These partition plates 110 and the inner wall of the housing 100 jointly enclose the space of the first exhaust passage 310. In addition, at least one exhaust outlet 120 adapted to the first exhaust passage 310 is opened on the housing 100 to facilitate the smooth discharge of gas.
[0063] The second exhaust passage 320 is cleverly arranged between the terminal 500 and the inner wall of the housing 100. The first end of this passage is connected and communicated with the exhaust side 210 of the arc extinguishing chamber 200, while the second end is connected and communicated with the corresponding wiring hole 130 of the terminal 500. Such a design ensures that when an arc is generated, gas can be smoothly discharged through this passage, thereby reducing the internal pressure.
[0064] The pressure balance passage 330 is arranged on the arcing initiation side 220 of the arc extinguishing chamber 200. On the arcing initiation side 220 of the arc extinguishing chamber 200, an arc running channel 440 is enclosed by two arc partition plates 400. The pressure balance passage 330 is arranged at intervals with the arc running channel 440 through the arc partition plates 400 and is communicated with the inside of the arc extinguishing chamber 200. This design helps to achieve pressure balance through the pressure balance passage 330 when an arc is generated, thereby further reducing the pressure inside the arc extinguishing chamber 200 and the corresponding switch device product.
[0065] The design of the above three passages can effectively break the generated arc pressure, and helps to reduce the internal pressure of the arc extinguishing chamber 200 and the corresponding switch device product through multi-channel pressure relief. This design significantly reduces or even eliminates the structural damage caused by high-pressure gas or arc to the housing 100 and parts, thereby improving the overall reliability and safety of the switch device.
[0066] Refer to Figure 2 and Figure 3 , in some examples, the pressure balance passage 330 is arranged on the side of the arc partition plate 400 away from the arc running channel 440, and each of the two arc partition plates 400 corresponds to a pressure balance passage 330. Alternatively, the pressure balance passage 330 is opened on the arc partition plate 400.
[0067] The pressure balance passage 330 in the above structure of the present application can be arranged on the back of the arc partition plate 400, and the back is the side of the arc partition plate 400 away from the arc running channel 440. In this case, each arc partition plate 400 corresponds to an independent pressure balance passage 330. Another possible design is to directly open the pressure balance passage 330 on the arc partition plate 400. These two structures show different setting methods of the pressure balance passage 330, and which method to choose specifically can be determined according to actual needs and design requirements.
[0068] The main function of the pressure balance channel 330 is to balance the gas pressure when some gas in the arc extinguishing chamber 200 cannot be discharged in time. It should be noted that the pressure balance channel 330 itself does not discharge the gas to the outside of the switching device, but only conducts a gas balance cycle inside the switching device.
[0069] Referring to Figure 4 , in some examples, a placement groove 410 for installing the magnetic conduction member 411 is provided on the side of the arc separating plate 400 facing away from the arc running path 440. A pressure balance air inlet 420 is opened on the wall surface of the placement groove 410 close to the arc extinguishing chamber 200, and a pressure balance air outlet 430 is opened on the wall surface of the placement groove 410 facing away from the arc extinguishing chamber 200.
[0070] The placement groove 410, the pressure balance air inlet 420, and the pressure balance air outlet 430 cooperate to form the pressure balance channel 330.
[0071] Two arc separating plates 400 can enclose the arc running path 440. The two arc separating plates 400 can be integrally provided, or the two arc separating plates 400 can be separately provided and spaced apart from each other to form the above-mentioned arc running path 440. A placement groove 410 for installing the magnetic conduction member 411 is provided on the side of the arc separating plate 400 facing away from the arc running path 440. A pressure balance air inlet 420 is opened on the wall surface of the placement groove 410 close to the arc extinguishing chamber 200. The pressure balance air inlet 420 here can achieve better pressure balance for the high-pressure gas in the arc extinguishing chamber 200. The pressure balance air inlet 420 allows gas to enter the placement groove 410 from the arc extinguishing chamber 200, thus helping to maintain the stability of the pressure during the arc extinguishing process. In addition, a pressure balance air outlet 430 is also opened on the wall surface of the placement groove 410 facing away from the arc extinguishing chamber 200. The pressure balance air outlet 430 allows gas to be discharged from the placement groove 410, further ensuring the pressure balance.
[0072] In this way, the placement groove 410, the pressure balance air inlet 420, and the pressure balance air outlet 430 cooperate together to form a complete pressure balance channel 330. The pressure balance channel 330 plays a crucial role during the arc extinguishing process, ensuring that the pressure inside the arc extinguishing chamber 200 can be effectively regulated and controlled, thereby improving the arc extinguishing efficiency and the overall performance of the switching device.
[0073] In some examples, at least two pressure balance air inlets 420 and pressure balance air outlets 430 are provided and form a grid structure. Such pressure balance air inlets 420 and pressure balance air outlets 430 have better pressure relief ability and more stable and reliable effects.
[0074] Specifically, both the pressure - balancing air inlet 420 and the pressure - balancing air outlet 430 can be set to include at least two openings arranged side by side. These openings together form a grid - like structure. Through this design, each opening can effectively share the pressure, thus enabling a higher improvement in the overall pressure - relief capacity. In addition, due to the presence of multiple openings, the pressure distribution of the entire arc - quenching system is more uniform, further enhancing the stability and reliability. Such a design not only improves the performance of the switching device but also ensures the stability and safety during operation in a high - voltage environment.
[0075] Referring to Figure 5 and Figure 6 , in some examples, the second exhaust passage 320 is formed by enclosing with the housing 100 and the terminal 500. Assembly grooves 150 are provided on the inner walls of the housing 100 corresponding to the terminal 500.
[0076] The terminal 500 plugs the assembly groove 150 and forms an exhaust cavity. An exhaust inlet 140 is opened on one side of the exhaust cavity close to the arc - quenching chamber 200, and the side of the exhaust cavity facing away from the arc - quenching chamber 200 communicates with the wiring hole 130.
[0077] The second exhaust passage 320 can be formed by the mutual cooperation of the housing 100 and the terminal 500. Specifically, an assembly groove 150 is provided on the inner wall of the housing 100 corresponding to the terminal 500. After the assembly groove 150 cooperates with the terminal 500, the outer wall of the wiring hole 130 of the terminal 500 can effectively block the assembly groove 150, thus forming an exhaust cavity. The function of the exhaust cavity is to discharge the high - pressure gas generated by the arc - quenching chamber 200. An exhaust inlet 140 is opened on one side of the exhaust cavity close to the arc - quenching chamber 200. Through the exhaust inlet 140, the gas generated inside the arc - quenching chamber 200 can be effectively discharged, thus ensuring the normal operation and safety of the switching device. In addition, the side of the exhaust cavity facing away from the arc - quenching chamber 200 communicates with the wiring hole 130, so that the transmitted high - pressure gas can be discharged through the wiring hole 130, further ensuring the smoothness of gas discharge. The above design of the present application not only makes clever use of the space between the housing 100 and the terminal 500 but also effectively improves the performance and safety of the entire device.
[0078] Referring to Figure 5 and Figure 6 , in some examples, at least one first support rib 160 is provided on the inner side of the assembly groove 150. The first support rib 160 abuts against the outer surface of the terminal 500, and the inner wall of the assembly groove 150 and the outer surface of the terminal 500 cooperate to form an exhaust cavity. In this setting method, the exhaust cavity is supported and formed by the first support rib 160 in the assembly groove 150.
[0079] The inner part of the assembly groove 150 is provided with at least one first support rib 160. The function of these first support ribs 160 is to abut against and support the outer surface of the terminal 500, ensuring the stability and fixity of the terminal 500 in the assembly groove 150. Through this design, the first support ribs 160 on the inner wall of the assembly groove 150 closely cooperate with the outer surface of the terminal 500 to jointly form an effective exhaust cavity. The formation of the exhaust cavity depends on the supporting effect of the first support ribs 160 in the assembly groove 150. The exhaust cavity formed in this way has higher stability, ensuring the stability of the exhaust cavity structure and the reliability of its function.
[0080] In some examples, at least one second support rib (not shown in the figure) is provided on the outer surface of the terminal 500. The second support rib abuts against the inner wall of the assembly groove 150, and the inner wall of the assembly groove 150 and the outer surface of the terminal 500 cooperate to form an exhaust cavity. In this setting method, the exhaust cavity is supported and formed by the second support rib on the outer surface of the terminal 500.
[0081] At least one second support rib can also be provided on the outer surface of the terminal 500. The function of these second support ribs is to abut against and support on the inner wall of the assembly groove 150, further ensuring the stability and fixity of the terminal 500 in the assembly groove 150. Through this design, the inner wall of the assembly groove 150 cooperates with the second support ribs on the outer surface of the terminal 500 to jointly form an effective exhaust cavity. The formation of the exhaust cavity depends on the supporting effect of the second support ribs on the outer surface of the terminal 500, thus ensuring the stability of the exhaust cavity structure and the reliability of its function.
[0082] It is possible to only provide the first support ribs 160 in the assembly groove 150 according to needs, or only provide the second support ribs on the outer peripheral side of the terminal 500. It is also possible to provide the first support ribs 160 in the assembly groove 150 and the second support ribs on the outer peripheral side of the terminal 500 according to needs. At this time, the first support ribs 160 and the second support ribs can be staggered with each other or spliced with each other.
[0083] In some examples, the projection of the exhaust inlet 140 towards the wall surface where the wiring hole 130 is located is at least partially staggered with the wiring hole 130;
[0084] The housing 100 is provided with a guide plate 151. The guide plate 151 is the cavity wall in the exhaust cavity between the exhaust inlet 140 and the wiring hole 130. The guide plate 151 is inclined relative to the exhaust inlet 140, and the guide plate 151 can guide the gas towards the direction of the wiring hole 130.
[0085] Based on the above examples of the present application, there is a certain staggered relationship between the orientation of the exhaust inlet 140 and the projection of the wall surface where the wiring hole 130 is located. Such a setting can prevent the high-pressure gas entering from the exhaust inlet 140 from directly spraying out from the position of the wiring hole 130. Instead, it can be buffered by the inner wall of the housing 100, reducing or even eliminating the interference of the high-pressure gas on the wiring terminal 500. Therefore, the above structure can effectively guide the gas flow, avoid directly impacting the wiring hole 130, and thus reduce the potential damage risk.
[0086] After the guide plate 151 is arranged inside the housing 100, since the guide plate 151 is located inside the exhaust cavity and at the position of the cavity wall between the exhaust inlet 140 and the wiring hole 130. By setting the guide plate 151 to be inclined relative to the exhaust inlet 140, the gas can be effectively guided from the exhaust inlet 140 to the direction of the wiring hole 130. In this way, the guide plate 151 can effectively control the gas flow path, ensure that the gas can smoothly flow to the wiring hole 130. After the high-pressure gas is redirected by the guide plate 151, the flow rate of the high-pressure gas can be reduced, the airflow impact can be decreased, and the overall exhaust efficiency and safety can be stabilized.
[0087] There may be tiny metal particles in the high-pressure gas flow. With the arrangement of the guide plate 151, it can prevent the tiny metal ions from directly flushing out from the position of the wiring hole 130, protecting the stability of the wiring of the wiring terminal 500.
[0088] In some examples, there are two second exhaust channels 320, and the two second exhaust channels 320 are respectively located on both sides of the wiring terminal 500.
[0089] The two second exhaust channels 320 in the present application can be two independent channels. These two second exhaust channels 320 are respectively located on both sides of the wiring terminal 500, such as the left and right sides. This layout makes the two second exhaust channels 320 have a certain symmetry with respect to the wiring terminal 500. Through this symmetric layout, it can be ensured that the two second exhaust channels 320 can evenly discharge gas during operation, thus achieving a better exhaust effect. This design not only improves the exhaust efficiency but also ensures the stability and reliability of the wiring terminal 500 in a high-temperature environment.
[0090] Refer to Figure 6 and in some examples, the first exhaust channel 310 includes two exhaust branches, and each exhaust branch corresponds to an exhaust outlet 120.
[0091] Taking the side of the housing 100 facing away from the handle as the bottom, one of the exhaust outlets 120 is opened at the bottom of the housing 100, and the other exhaust outlet 120 is opened below the wiring hole 130.
[0092] The first exhaust passage 310 may include two independent exhaust branches. Each exhaust branch corresponds to a specific exhaust outlet 120. Specifically, these exhaust outlets 120 can all discharge gas.
[0093] Taking the side of the housing 100 facing away from the handle as the bottom. In this setting reference, one of the exhaust outlets 120 is opened at the bottom position of the housing 100. Such a design can ensure that gas can smoothly discharge from the bottom of the switching device, thus avoiding the accumulation of gas inside the switching device and affecting the normal operation of the switching device. The other exhaust outlet 120 can be opened below the wiring hole 130 of the housing 100. Such a layout can ensure that when wiring operations are carried out on the switching device, the discharged gas will not cause interference or discomfort to the operator. Through the setting of the two exhaust outlets 120, the switching device can have a better exhaust effect.
[0094] In some examples, an adjustable valve is provided on the exhaust outlet 120 at the bottom of the housing 100.
[0095] In order to better control the gas discharge, an adjustable valve is also specially provided on the exhaust outlet 120 at the bottom of the housing 100. By adjusting this valve, the operator can adjust the gas discharge volume at the bottom according to actual needs. This design not only improves the flexibility of the switching device but also enhances its applicability in different working environments. In this way, the user can control the gas discharge of the bottom exhaust outlet 120 according to the actual working requirements, thereby ensuring the efficient operation and operational safety of the switching device to a certain extent.
[0096] In a second aspect, an embodiment of the present application provides a circuit breaker, including the exhaust assembly 300 and the housing 100 as described above, and the exhaust assembly 300 is disposed inside the housing 100.
[0097] The circuit breaker having the exhaust assembly 300 of the present application can reduce the internal pressure of the arc extinguishing chamber 200 and the corresponding switching device products through multi-channel pressure relief. Reduce or even eliminate structural damage to the housing 100 and parts caused by high-pressure gas or electric arcs.
[0098] Specifically, the first exhaust passage 310 is directly connected and communicated with the exhaust side 210 of the arc extinguishing chamber 200. In order to form this passage, one or more partition plates 110 are specially provided inside the housing 100. These partition plates 110 and the inner wall of the housing 100 jointly enclose the space of the first exhaust passage 310. In addition, at least one exhaust outlet 120 adapted to the first exhaust passage 310 is opened on the housing 100 to facilitate the smooth discharge of gas.
[0099] The second exhaust passage 320 is ingeniously arranged between the terminal 500 and the inner wall of the housing 100. The first end of this passage communicates with the exhaust side 210 of the arc extinguishing chamber 200, while the second end communicates with the corresponding wiring hole 130 of the terminal 500. Such a design ensures that when an arc is generated, the gas can be smoothly discharged through this passage, thereby reducing the internal pressure.
[0100] The pressure balance passage 330 is arranged on the arcing side 220 of the arc extinguishing chamber 200. On the arcing side 220 of the arc extinguishing chamber 200, an arc running path 440 is formed by enclosing with two arc dividing plates 400. The pressure balance passage 330 is arranged at intervals with the arc running path 440 through the arc dividing plates 400 and is communicated with the inside of the arc extinguishing chamber 200. This design helps to balance the pressure through the pressure balance passage 330 when an arc is generated, thereby further reducing the pressure inside the arc extinguishing chamber 200 and the corresponding switching device product.
[0101] The design of the above three passages can effectively break the generated arc pressure, and helps to reduce the internal pressure of the arc extinguishing chamber 200 and the corresponding switching device product through multi-channel pressure relief. This design significantly reduces or even eliminates the structural damage caused by high-pressure gas or arc to the housing 100 and parts, thereby improving the overall reliability and safety of the switching device.
[0102] The switching device in this application is not limited to a circuit breaker, and may also include other switching devices such as contactors, fuses, and relays, which are specifically set according to actual needs.
[0103] In the drawings of this application, the same or similar reference numerals correspond to the same or similar components; in the description of this application, it should be understood that if there are terms such as "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship, it is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the drawings are only for illustrative purposes and cannot be understood as a limitation of this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.
[0104] The above are only the preferred examples of this application and are not intended to limit this application. Any modifications, equivalent replacements, and improvements made within the spirit and principle of this application shall be included in the protection scope of this application.
Claims
1. An exhaust assembly, characterized in that, The switch device includes a housing, an arc extinguishing chamber arranged in the housing, and at least one terminal arranged on the exhaust side of the arc extinguishing chamber. The exhaust assembly includes: a first exhaust passage, connected to the exhaust side of the arc extinguishing chamber, at least one partition is provided in the shell, the partition and the inner wall of the shell enclose the first exhaust passage, and at least one exhaust outlet adapted to the first exhaust passage is provided on the shell; A second exhaust channel is provided between the wiring terminal and the inner wall of the housing, a first end of the second exhaust channel is connected to the exhaust side of the arc extinguishing chamber, and a second end of the second exhaust channel is connected to the wiring hole corresponding to the wiring terminal; A pressure balance channel is arranged on the arc striking side of the arc extinguishing chamber. The arc striking side of the arc extinguishing chamber is provided with an arc runway surrounded by two arc isolation plates. The pressure balance channel is spaced apart from the arc runway through the arc isolation plates and is connected to the arc extinguishing chamber.
2. The exhaust assembly according to claim 1, wherein The pressure balance channel is arranged on the side of the arc isolation plate away from the arc track, and two arc isolation plates correspond to one pressure balance channel respectively; or, The pressure balance channel is opened on the arc isolation plate.
3. The exhaust assembly according to claim 1, wherein A placement groove for installing a magnetic conductive member is provided on the side of the arc isolation plate away from the arc runway, a pressure balance air inlet is provided on the wall surface of the placement groove close to the arc extinguishing chamber, and a pressure balance air outlet is provided on the wall surface of the placement groove away from the arc extinguishing chamber; The placement groove, the pressure-balancing air inlet, and the pressure-balancing air outlet cooperate to form the pressure-balancing channel.
4. The exhaust assembly according to claim 3, characterized in that, At least two of the pressure-balancing air inlets and the pressure-balancing air outlets are provided to form a grid structure.
5. The exhaust assembly according to any one of claims 1 to 4, characterized in that The second exhaust channel is formed by the shell and the wiring terminal, and the inner walls of the shell and the wiring terminal corresponding to each other are provided with assembly grooves; The wiring terminal blocks the assembly groove and forms an exhaust cavity, a side of the exhaust cavity close to the arc extinguishing chamber is provided with an exhaust inlet, and a side of the exhaust cavity away from the arc extinguishing chamber is communicated with the wiring hole.
6. The exhaust assembly according to claim 5, wherein At least one first supporting ridge is disposed on the inner side of the assembly groove, the first supporting ridge abuts against the outer surface of the wiring terminal, and the inner wall of the assembly groove cooperates with the outer surface of the wiring terminal to form the exhaust cavity; Alternatively, the outer surface of the connecting terminal is provided with at least one second supporting edge, the second supporting edge abuts against the inner wall of the assembly groove, and the inner wall of the assembly groove cooperates with the outer surface of the connecting terminal to form the exhaust cavity.
7. The exhaust assembly according to claim 5, characterized in that, The projection of the exhaust inlet toward the wall where the wiring hole is located is at least partially staggered with the wiring hole; The shell is provided with a guide plate, which is a cavity wall in the exhaust cavity between the exhaust inlet and the wiring hole. The guide plate is inclined relative to the exhaust inlet and can guide the gas toward the wiring hole.
8. The exhaust assembly according to any one of claims 1-4, 6, and 7, characterized in that, The first exhaust passage comprises two exhaust branches, each of the exhaust branches corresponds to one of the exhaust outlets; The side of the shell facing away from the handle is the bottom, one of the exhaust outlets is opened at the bottom of the shell, and the other exhaust outlet is opened below the wiring hole.
9. The exhaust assembly according to claim 8, characterized in that An adjustable valve is arranged on the exhaust outlet at the bottom of the housing.
10. A circuit breaker, characterized in that, include: An exhaust assembly as claimed in any one of claims 1 to 9; and, A shell body, wherein the exhaust assembly is arranged in the shell body.