Circuit breakers based on multiple air outlet channels

Abstract

This invention discloses a circuit breaker based on multiple venting channels, comprising a circuit breaker housing (1), an arc-extinguishing mechanism (2) in the middle of the circuit breaker housing (1), a venting mechanism on one side of the arc-extinguishing mechanism (2), and an exhaust port on the circuit breaker housing (1) outside the venting mechanism. The venting mechanism includes an arc-blocking member (3) fastened to the circuit breaker housing (1), a wire clamp (4) detachably connected to the middle of the arc-blocking member (3), and two symmetrical venting chambers (5) formed between the sidewall of the arc-blocking member (3) and the two sides of the circuit breaker housing (1). The inner end of each venting chamber (5) communicates with the exhaust port of the arc-extinguishing mechanism (2), and the outer end of each venting chamber (5) communicates with the exhaust port. This invention can shorten the length of the circuit breaker and improve its safety.

Description

Technical Field

[0001] This invention relates to a circuit breaker, and more particularly to a circuit breaker based on multiple air outlet channels. Background Technology

[0002] The existing arc-extinguishing gas exhaust structure of circuit breakers, as shown in patent 201120551922.3, includes an arc-extinguishing mechanism. An exhaust port is provided on the circuit breaker housing outside the arc-extinguishing mechanism, forming an exhaust channel between the exhaust port and the arc-extinguishing mechanism. Multiple baffles can be installed within the exhaust channel as needed to separate different arc gases. In use, after the arc gas is discharged from the arc-extinguishing mechanism, it is separated by the baffles into multiple airflows, which then flow separately within the exhaust channel. When these multiple airflows reach the exhaust port, they converge again and are discharged together from the exhaust port. This achieves the exhaust effect while extending the convergence time of different airflows, thus improving the arc-extinguishing effect.

[0003] The aforementioned circuit breaker has several drawbacks. First, the vent channel inevitably occupies internal space after installation. Furthermore, to prolong the arc gas convergence time, sufficient venting distance is required to ensure arc extinguishing effectiveness, further increasing the space occupied by the circuit breaker and thus its overall length. Second, while the baffle plate improves arc extinguishing, it also occupies internal space in the vent channel, making the already limited space even narrower. This narrowing reduces the capacity and buffering effect of the arc gas, causing a rapid pressure increase at the moment of circuit breaker opening and a faster outward flow of arc gas, thus increasing the fuse distance and reducing safety.

[0004] In addition, the existing circuit breaker's arc extinguishing gas outlet structure is designed with only one outlet. This means that no matter how the arc gas is separated and flows after being discharged from the arc extinguishing mechanism, it will re-converge at the outlet. This increases the possibility that electrons with large potential differences will re-converge with the airflow and form a discharge, reducing the safety of the circuit breaker.

[0005] Therefore, existing circuit breakers suffer from problems such as large length and space occupation and low safety. Summary of the Invention

[0006] The purpose of this invention is to provide a circuit breaker based on multiple air outlet channels. This design can shorten the length of the circuit breaker and improve its safety.

[0007] The technical solution of the present invention is as follows: a circuit breaker based on multiple venting channels, including a circuit breaker housing, an arc-extinguishing mechanism in the middle of the circuit breaker housing, a venting mechanism on one side of the arc-extinguishing mechanism, and an exhaust port on the circuit breaker housing outside the venting mechanism. The venting mechanism includes an arc-blocking member fastened to the inside of the circuit breaker housing, a wire clamp detachably connected to the middle of the arc-blocking member, and two symmetrical venting chambers formed between the sidewall of the arc-blocking member and the two sides of the circuit breaker housing. The inner end of the venting chamber is connected to the exhaust port of the arc-extinguishing mechanism, and the outer end of the venting chamber is connected to the exhaust port.

[0008] In the aforementioned circuit breaker based on multiple air outlet channels, the arc-blocking component is provided with several spaced air guide plates at one end near the arc-extinguishing mechanism, and an air guide groove for ventilation is formed between adjacent air guide plates. After being discharged, part of the arc gas of the arc-extinguishing mechanism enters the air outlet chamber through the air guide groove.

[0009] In the aforementioned circuit breaker based on multiple air outlet channels, the air guide plate includes a first air guide plate and a second air guide plate located in two air outlet chambers respectively. The first air guide plate and the second air guide plate are staggered vertically along the height direction of the arc-blocking member. The arc-extinguishing mechanism has multiple arc-extinguishing grids arranged side by side, and an arc-extinguishing channel is formed between adjacent arc-extinguishing grids. The arc gas in the adjacent arc-extinguishing channels enters the two air outlet chambers respectively after being separated by the first air guide plate and the second air guide plate.

[0010] In the aforementioned circuit breaker based on multiple air outlet channels, the air outlet chamber is provided with a first partition plate having a plurality of matching air guide grooves spaced apart. The outer side of the first partition plate is in contact with the air guide plate, and the different air guide grooves in the air outlet chamber are separated from each other by the first partition plate and the air guide plate.

[0011] In the aforementioned circuit breaker based on multiple venting channels, the vent includes a first vent and a second vent respectively disposed on the circuit breaker housing. The venting chamber includes a first venting chamber, a second venting chamber, a third venting chamber, and a fourth venting chamber that are separated from each other. One side of the first venting chamber, the second venting chamber, the third venting chamber, and the fourth venting chamber are respectively connected to a portion of the venting port of the arc extinguishing mechanism. The outside of the first venting chamber and the second venting chamber is connected to the first vent, and the outside of the third venting chamber and the fourth venting chamber is connected to the second vent.

[0012] In the aforementioned circuit breaker based on multiple air outlet channels, the air outlet chamber is provided with a second partition plate connected to the circuit breaker housing, and a second air outlet chamber and a third air outlet chamber are formed on both sides of the second partition plate, respectively.

[0013] In the aforementioned circuit breaker based on multiple gas outlet channels, the first gas outlet chamber and the second gas outlet chamber are separated from each other by an arc-blocking member and the circuit breaker housing at the end near the arc-extinguishing mechanism, and the other ends of the first gas outlet chamber and the second gas outlet chamber are connected to each other. The first exhaust port is located at the end of the first gas outlet chamber, and the arc gas in the second gas outlet chamber is discharged outward by passing through the first gas outlet chamber and the first exhaust port in sequence.

[0014] In the aforementioned circuit breaker based on multiple exhaust channels, an arc-extinguishing plate that is detachably connected to the circuit breaker housing is provided in the first exhaust chamber inside the first exhaust port. The arc gas in the first and second exhaust chambers passes through the arc-extinguishing plate and is discharged outward during exhaust.

[0015] In the aforementioned circuit breaker based on multiple exhaust channels, an exhaust channel is formed inside the second exhaust port. The third and fourth exhaust chambers are separated from each other by an arc-blocking member and the circuit breaker housing at the end near the arc-extinguishing mechanism. The other ends of the third and fourth exhaust chambers are simultaneously connected to the exhaust channel.

[0016] In the aforementioned circuit breaker based on multiple exhaust channels, the end of the conductor clamp extends to the outside of the arc-blocking member and is located in the exhaust channel. The arc gas in the third and fourth exhaust chambers passes through the conductor clamp and enters the second exhaust port.

[0017] The aforementioned circuit breaker based on multiple air outlet channels also includes a handle and an actuator located inside the circuit breaker housing and connected to each other. A moving contact is connected to the actuator, and a stationary contact is provided on one side of the moving contact. The moving contact is rotatably connected to the actuator, and a contact spring is connected between the moving contact and the actuator. An energy storage rod is provided on one side of the moving contact, and an overlapping part for engaging the energy storage rod is provided on the moving contact. One end of the energy storage rod forms a trigger part, and an energy storage spring is connected to the outside of the trigger part. A pressing part is provided on the handle on one side of the trigger part.

[0018] In the aforementioned circuit breaker based on multiple air outlet channels, when the handle is in the open state, the overlapping part and the energy storage rod are separated from each other, the energy storage spring and the triggering part are attached to each other and drive the energy storage rod to the retracted state, and the compression part and the triggering part are separated from each other.

[0019] When the handle is in the initial rotating closing state, the handle drives the actuator to perform the closing action, and the moving contact moves synchronously with the closing of the actuator. At the same time, the pressing part moves towards the trigger part as the handle rotates to close the circuit.

[0020] When the handle is rotated to the energy storage state, the overlapping part engages with the energy storage rod as the moving contact moves, and there is a gap between the pressing part and the triggering part; at this time, the moving contact is limited by the engagement of the energy storage rod and rotates relative to the actuator as the actuator performs the subsequent closing action, and the contact spring contracts as the moving contact and the actuator rotate relative to each other.

[0021] When the handle is rotated to the trigger state, the pressing part rotates to fit against the trigger part, and the subsequent rotation of the handle presses against the trigger part. After being pressed, the trigger part overcomes the elastic force of the energy storage spring and drives the energy storage rod to extend outward, thereby releasing the locking limit of the moving contact. After the limit is released, the moving contact is rapidly rotated towards the stationary contact by the elastic force of the contact spring until it is fully fitted with the stationary contact.

[0022] In the aforementioned circuit breaker based on multiple air outlet channels, when the handle is opened, the compression part separates from the energy storage rod as the handle opens, and the energy storage rod is retracted by the energy storage spring after rebound, thus completing the reset of the energy storage rod.

[0023] In the aforementioned circuit breaker based on multiple air outlet channels, the energy storage spring is rotatably connected to the handle and one end is fastened to the circuit breaker housing, while the other end of the energy storage spring is fastened to the energy storage rod.

[0024] In the aforementioned circuit breaker based on multiple air outlet channels, a drive groove is provided on one side of the handle, the trigger part extends into the drive groove and is fastened to the energy storage spring, the compression part is the end sidewall of the drive groove, and the compression part and the energy storage spring are located on both sides of the trigger part.

[0025] In the aforementioned circuit breaker based on multiple air outlet channels, the handle and the actuator are connected by a U-shaped link, and the energy storage spring and the drive groove are both located on the side of the handle away from the U-shaped link.

[0026] In the aforementioned circuit breaker based on multiple air outlet channels, the circuit breaker housing is provided with a slide rail for slidingly connecting an energy storage rod, and the energy storage rod is fastened and connected within the slide rail.

[0027] Compared with the prior art, the present invention has the following characteristics:

[0028] (1) By structurally matching the arc-blocking component and the circuit breaker housing, the present invention enables the inner side of the arc-blocking component to be used for installing the wire clamp, and the gap between the arc-blocking component and the two sides of the circuit breaker housing to form an exhaust chamber for exhausting gas. This allows the exhaust chamber and the wire clamp to be distributed side by side along the thickness direction of the circuit breaker, and the arc gas discharged from the arc-extinguishing mechanism can be discharged outward through the two exhaust chambers. That is, while realizing the exhaust function, the amount of space occupied by the exhaust mechanism on the length of the circuit breaker is effectively reduced.

[0029] (2) The conductor clamp is wrapped by the arc-blocking component, and the gas outlet chamber is symmetrically set in the circuit breaker housing on both sides of the arc-blocking component, so that the gas outlet chamber can completely cover the internal space of the circuit breaker housing along the height direction, thereby effectively improving the overall gas storage space of the gas outlet mechanism, reducing the gas outlet speed of the arc gas, and alleviating the rise of gas pressure inside the circuit breaker.

[0030] (3) Through the structural cooperation of the gas guide plate and the arc extinguishing mechanism, the arc gas in different arc extinguishing channels can enter the two outlet chambers in an alternating manner after being discharged, thereby effectively improving the separation effect of the arc gas and extending the time for the arc gas in different arc extinguishing channels to re-converge after separation; on this basis, through the cooperation of the first partition plate and the gas guide plate, the different gas guide slots in each outlet chamber can also be separated, that is, further increasing the convergence time of the arc gas in different gas guide slots and improving its arc cutting effect;

[0031] (4) By dividing the exhaust chamber into a first exhaust chamber, a second exhaust chamber, a third exhaust chamber, and a fourth exhaust chamber, and splitting the exhaust port into a first exhaust port and a second exhaust port that are separate from each other, on the one hand, the original single exhaust port can be changed into a double exhaust port, so that the arc gas volume at each exhaust port is only half of the original, which effectively improves the safety of the circuit breaker during exhaust; on the other hand, by discharging the arc gas in the first exhaust chamber and the second exhaust chamber through the first exhaust port, and discharging the arc gas in the third exhaust chamber and the fourth exhaust port through the second exhaust port, the two parts of arc gas with a relatively larger potential difference can be permanently separated, while the two parts of arc gas with a relatively smaller potential difference can be discharged together, thereby further reducing the discharge effect generated after the arc gas in different arc extinguishing channels converges at the exhaust port, and further improving the safety of the circuit breaker.

[0032] (5) By setting up the arc extinguishing plate, the arc gas discharged from the first and second exhaust chambers can be electron-adsorbed and cooled down, thereby improving the safety of the arc gas when it is discharged from the first exhaust port; by cooperating with the exhaust channel and the wire clamp, the arc gas discharged from the third and fourth exhaust chambers can also be electron-adsorbed and cooled down by the metal wire clamp, thereby improving the safety of the arc gas when it is discharged from the second exhaust port.

[0033] (6) Through the structural cooperation of the energy storage rod, energy storage spring and moving contact, the moving contact can enter the energy storage state during the closing process of the handle, that is, the contact spring is contracted; when the handle is rotated to the trigger state, the energy storage rod releases the limit on the moving contact and the moving contact moves quickly and contacts the stationary contact under the rebound action of the contact spring; under the above cooperation, the moving contact can quickly complete the closing action, and will not be restricted by the rotation position of the handle and stay in the arc trigger position, thereby effectively reducing the amount of arc release generated during the closing process and further improving the safety of the present invention;

[0034] (7) By optimizing the connection structure and operation of the energy storage rod, the present invention can achieve the function of rapid closing of the moving contact by simply adding an energy storage rod and an energy storage spring to the existing circuit breaker, which effectively reduces the modification of the circuit breaker structure and the occupation of the internal space of the circuit breaker, and improves the applicability of the present invention.

[0035] Therefore, the present invention can shorten the length of the circuit breaker and improve its safety. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the structure of Example 1;

[0037] Figure 2 These are partial structural diagrams of the circuit breaker housing in Embodiments 1 and 2 at the location of the air outlet mechanism;

[0038] Figure 3 These are connection structure diagrams of the circuit breaker housing and arc-blocking component at the air outlet of the arc-extinguishing mechanism in Embodiments 1 and 2.

[0039] Figure 4 These are exploded views of the arc-blocking components at the connection points in Examples 1 and 2;

[0040] Figure 5 This is a structural schematic diagram of Example 2;

[0041] Figure 6 This is a partial structural diagram of Embodiment 2 in the open state;

[0042] Figure 7 This is a partial structural diagram of Example 2 in the energy storage state;

[0043] Figure 8 This is a partial structural diagram of Example 2 in the triggered state.

[0044] The labels in the attached diagram are as follows: 1-Circuit breaker housing, 2-Arc extinguishing mechanism, 3-Arc blocking component, 4-Wire clamp, 5-Gas outlet chamber, 6-Gas guide plate, 7-Gas guide groove, 8-First partition, 9-First exhaust port, 10-Second exhaust port, 11-Second partition, 12-Arc extinguishing plate, 13-Exhaust channel, 14-Handle, 15-Actuator, 16-Moving contact, 17-Stationary contact, 18-Contact spring, 19-Energy storage rod, 20-Energy storage spring, 21-Compression part, 22-Drive groove, 23-U-shaped connecting rod, 24-Slide rail, 501-First exhaust chamber, 502-Second exhaust chamber, 503-Third exhaust chamber, 504-Fourth exhaust chamber, 601-First gas guide plate, 602-Second gas guide plate, 161-Overlapping part, 191-Triggering part. Detailed Implementation

[0045] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0046] Example 1. A circuit breaker based on multiple air outlet channels is configured as follows: Figure 1-4 As shown, the circuit breaker includes a circuit breaker housing 1, an arc-extinguishing mechanism 2 is provided in the middle of the circuit breaker housing 1, an air outlet mechanism is provided on one side of the arc-extinguishing mechanism 2, and an exhaust port is provided on the circuit breaker housing 1 outside the air outlet mechanism. The air outlet mechanism includes an arc-blocking member 3 that is fastened and connected inside the circuit breaker housing 1. A wire clamp 4 is detachably connected to the middle of the arc-blocking member 3. Two symmetrical air outlet chambers 5 are formed between the side wall of the arc-blocking member 3 and the two sides of the circuit breaker housing 1. The inner end of the air outlet chamber 5 is connected to the air outlet of the arc-extinguishing mechanism 2, and the outer end of the air outlet chamber 5 is connected to the exhaust port.

[0047] The arc-blocking component 3 has several spaced air guide plates 6 at one end near the arc-extinguishing mechanism 2. The outer end of the guide portion is in contact with the arc-extinguishing mechanism 2. An air guide groove 7 for ventilation is formed between adjacent air guide plates 6. After being discharged, part of the arc gas of the arc-extinguishing mechanism 2 enters the exhaust chamber 5 through the air guide groove 7.

[0048] The air guide plate 6 includes a first air guide plate 601 and a second air guide plate 602 located in two air outlet chambers 5 respectively. The first air guide plate 601 and the second air guide plate 602 are staggered vertically along the height direction of the arc-blocking member 3. Multiple arc-extinguishing grids are arranged side by side in the arc-extinguishing mechanism 2, and an arc-extinguishing channel is formed between adjacent arc-extinguishing grids. The width of the first air guide plate 601 and the second air guide plate 602 is the same and is half the width of the arc-extinguishing channel. After the first air guide plate 601 and the second air guide plate 602 are attached together, they partially block the arc-extinguishing channel. The arc gas in the adjacent arc-extinguishing channels enters the two air outlet chambers 5 respectively after being separated by the first air guide plate 601 and the second air guide plate 602.

[0049] The air outlet chamber 5 is provided with a first partition 8 having a plurality of matching air guide grooves 7 spaced apart. The outer side of the first partition 8 is in contact with the air guide plate 6. Different air guide grooves 7 in the air outlet chamber 5 are separated from each other by the first partition 8 and the air guide plate 6.

[0050] The exhaust port includes a first exhaust port 9 and a second exhaust port 10 respectively disposed on the circuit breaker housing 1. The first exhaust port 9 and the second exhaust port 10 are located on the upper and lower sides of the circuit breaker housing 1 respectively. The exhaust chamber 5 includes a first exhaust chamber 501, a second exhaust chamber 502, a third exhaust chamber 503 and a fourth exhaust chamber 504 that are separated from each other. The first exhaust chamber 501, the second exhaust chamber 502, the third exhaust chamber 503 and the fourth exhaust chamber 504 completely cover the exhaust port of the arc extinguishing mechanism 2 along the height direction. One side of the first exhaust chamber 501, the second exhaust chamber 502, the third exhaust chamber 503 and the fourth exhaust chamber 504 are respectively connected to a part of the exhaust port of the arc extinguishing mechanism 2. The outside of the first exhaust chamber 501 and the second exhaust chamber 502 are connected to the first exhaust port 9, and the outside of the third exhaust chamber 503 and the fourth exhaust chamber 504 are connected to the second exhaust port 10.

[0051] The air outlet chamber 5 is provided with a second partition 11 that connects to the circuit breaker housing 1. A second air outlet chamber 502 and a third air outlet chamber 503 are formed on both sides of the second partition 11, and the second air outlet chamber 502 and the third air outlet chamber 503 are separated from each other by the second partition 11 and are not connected to each other.

[0052] The first exhaust chamber 501 and the second exhaust chamber 502 are separated from each other by the arc blocking member 3 and the circuit breaker housing 1 at one end near the arc extinguishing mechanism 2. The other ends of the first exhaust chamber 501 and the second exhaust chamber 502 are connected to each other. The first exhaust port 9 is located at the end of the first exhaust chamber 501. The arc gas in the second exhaust chamber 502 is discharged outward by passing through the first exhaust chamber 501 and the first exhaust port 9 in sequence.

[0053] The first exhaust chamber 501 inside the first exhaust port 9 is provided with an arc extinguishing plate 12 that is detachably connected to the circuit breaker housing 1. The arc gas in the first exhaust chamber 501 and the second exhaust chamber 502 passes through the arc extinguishing plate 12 and is discharged outward during exhaust.

[0054] An exhaust channel 13 is formed inside the second exhaust port 10. The third exhaust chamber 503 and the fourth exhaust chamber 504 are separated from each other by the arc-blocking member 3 and the circuit breaker housing 1 at one end near the arc-extinguishing mechanism 2. The other ends of the third exhaust chamber 503 and the fourth exhaust chamber 504 are simultaneously connected to the exhaust channel 13.

[0055] The end of the wire clamp 4 extends to the outside of the arc-blocking member 3 and is located in the exhaust channel 13. The arc gas in the third exhaust chamber 503 and the fourth exhaust chamber 504 passes through the wire clamp 4 and enters the second exhaust port 10.

[0056] In this embodiment, during use, the arc gas is discharged from the arc-extinguishing mechanism 2, and the arc gas in different arc-extinguishing channels enters the first outlet chamber 501, the second outlet chamber 502, the third outlet chamber 503, and the fourth outlet chamber 504 respectively under the guidance of the gas guide groove 7 and the outer wall of the arc-blocking member 3. The arc gas in the first outlet chamber 501 flows directly towards the first exhaust port 9; the arc gas in the second outlet chamber 502 first converges at the rear end of the second outlet chamber 502, then flows along the gap between the arc-blocking member 3 and the circuit breaker housing 1 to the first outlet chamber 501 at the front end of the arc-extinguishing plate 12, and together with the arc gas in the first outlet chamber 501, passes through the arc-extinguishing plate 12 and the first exhaust port 9 and is discharged outwards. The arc-extinguishing plate 12 can extinguish the arc gas in the first outlet chamber 501 and the second outlet chamber 502, improving the safety of the arc gas during discharge.

[0057] The arc gas in the third exhaust chamber 503 and the fourth exhaust chamber 504 flows towards the exhaust channel 13, converges at the exhaust channel 13, and then passes through the wire clamp 4 and the second exhaust port 10 to be discharged outward. The wire clamp 4 can adsorb and cool the electrons in the arc gas as it passes through, thereby improving the safety of the arc gas during discharge.

[0058] With the above-mentioned coordination, the arc gas of the present invention, after being discharged through the arc extinguishing mechanism 2, can be cut into eight parts and enter the respective outlet chambers of the two outlet chambers 5, thereby effectively prolonging the convergence time of the arc gas in different outlet chambers and improving the arc extinguishing effect. On this basis, by setting the first exhaust port 9 and the second exhaust port 10, the arc gas on the upper and lower sides of the arc extinguishing mechanism 2 can be separated from each other by the circuit breaker housing 1 and the arc extinguishing mechanism 2 after being discharged, and discharged outward from the upper and lower sides of the circuit breaker respectively, thereby achieving complete separation of the two parts of arc gas during the exhaust process, effectively preventing the two parts of arc gas with relatively large potential differences from converging and forming a discharge.

[0059] Meanwhile, the air outlet chamber 5 formed between the arc-blocking member 3 and the circuit breaker housings 1 on both sides can effectively utilize the remaining space between the conductor clamp 4 and the circuit breaker housing 1 in the original circuit breaker, thereby reducing the space occupied by the air outlet mechanism in the length direction of the circuit breaker, thus improving the air outlet effect of the circuit breaker while reducing the overall size of the circuit breaker.

[0060] Example 2. A circuit breaker based on multiple air outlet channels is configured as follows: Figure 2-8As shown, the circuit breaker includes a circuit breaker housing 1, an arc-extinguishing mechanism 2 is provided in the middle of the circuit breaker housing 1, an air outlet mechanism is provided on one side of the arc-extinguishing mechanism 2, and an exhaust port is provided on the circuit breaker housing 1 outside the air outlet mechanism. The air outlet mechanism includes an arc-blocking member 3 that is fastened and connected inside the circuit breaker housing 1. A wire clamp 4 is detachably connected to the middle of the arc-blocking member 3. Two symmetrical air outlet chambers 5 are formed between the side wall of the arc-blocking member 3 and the two sides of the circuit breaker housing 1. The inner end of the air outlet chamber 5 is connected to the air outlet of the arc-extinguishing mechanism 2, and the outer end of the air outlet chamber 5 is connected to the exhaust port.

[0061] The arc-blocking component 3 has several spaced air guide plates 6 at one end near the arc-extinguishing mechanism 2. The outer end of the guide portion is in contact with the arc-extinguishing mechanism 2. An air guide groove 7 for ventilation is formed between adjacent air guide plates 6. After being discharged, part of the arc gas of the arc-extinguishing mechanism 2 enters the exhaust chamber 5 through the air guide groove 7.

[0062] The air guide plate 6 includes a first air guide plate 601 and a second air guide plate 602 located in two air outlet chambers 5 respectively. The first air guide plate 601 and the second air guide plate 602 are staggered vertically along the height direction of the arc-blocking member 3. Multiple arc-extinguishing grids are arranged side by side in the arc-extinguishing mechanism 2, and an arc-extinguishing channel is formed between adjacent arc-extinguishing grids. The width of the first air guide plate 601 and the second air guide plate 602 is the same and is half the width of the arc-extinguishing channel. After the first air guide plate 601 and the second air guide plate 602 are attached together, they partially block the arc-extinguishing channel. The arc gas in the adjacent arc-extinguishing channels enters the two air outlet chambers 5 respectively after being separated by the first air guide plate 601 and the second air guide plate 602.

[0063] The air outlet chamber 5 is provided with a first partition 8 having a plurality of matching air guide grooves 7 spaced apart. The outer side of the first partition 8 is in contact with the air guide plate 6. Different air guide grooves 7 in the air outlet chamber 5 are separated from each other by the first partition 8 and the air guide plate 6.

[0064] The exhaust port includes a first exhaust port 9 and a second exhaust port 10 respectively disposed on the circuit breaker housing 1. The first exhaust port 9 and the second exhaust port 10 are located on the upper and lower sides of the circuit breaker housing 1 respectively. The exhaust chamber 5 includes a first exhaust chamber 501, a second exhaust chamber 502, a third exhaust chamber 503 and a fourth exhaust chamber 504 that are separated from each other. The first exhaust chamber 501, the second exhaust chamber 502, the third exhaust chamber 503 and the fourth exhaust chamber 504 completely cover the exhaust port of the arc extinguishing mechanism 2 along the height direction. One side of the first exhaust chamber 501, the second exhaust chamber 502, the third exhaust chamber 503 and the fourth exhaust chamber 504 are respectively connected to a part of the exhaust port of the arc extinguishing mechanism 2. The outside of the first exhaust chamber 501 and the second exhaust chamber 502 are connected to the first exhaust port 9, and the outside of the third exhaust chamber 503 and the fourth exhaust chamber 504 are connected to the second exhaust port 10.

[0065] The air outlet chamber 5 is provided with a second partition 11 that connects to the circuit breaker housing 1. A second air outlet chamber 502 and a third air outlet chamber 503 are formed on both sides of the second partition 11, and the second air outlet chamber 502 and the third air outlet chamber 503 are separated from each other by the second partition 11 and are not connected to each other.

[0066] The first exhaust chamber 501 and the second exhaust chamber 502 are separated from each other by the arc blocking member 3 and the circuit breaker housing 1 at one end near the arc extinguishing mechanism 2. The other ends of the first exhaust chamber 501 and the second exhaust chamber 502 are connected to each other. The first exhaust port 9 is located at the end of the first exhaust chamber 501. The arc gas in the second exhaust chamber 502 is discharged outward by passing through the first exhaust chamber 501 and the first exhaust port 9 in sequence.

[0067] The first exhaust chamber 501 inside the first exhaust port 9 is provided with an arc extinguishing plate 12 that is detachably connected to the circuit breaker housing 1. The arc gas in the first exhaust chamber 501 and the second exhaust chamber 502 passes through the arc extinguishing plate 12 and is discharged outward during exhaust.

[0068] An exhaust channel 13 is formed inside the second exhaust port 10. The third exhaust chamber 503 and the fourth exhaust chamber 504 are separated from each other by the arc-blocking member 3 and the circuit breaker housing 1 at one end near the arc-extinguishing mechanism 2. The other ends of the third exhaust chamber 503 and the fourth exhaust chamber 504 are simultaneously connected to the exhaust channel 13.

[0069] The end of the wire clamp 4 extends to the outside of the arc-blocking member 3 and is located in the exhaust channel 13. The arc gas in the third exhaust chamber 503 and the fourth exhaust chamber 504 passes through the wire clamp 4 and enters the second exhaust port 10.

[0070] It also includes a handle 14 and an actuator 15 located inside the circuit breaker housing 1 and connected to each other. A handle spring is connected to the handle 14, and a moving contact 16 is connected to the actuator 15. A stationary contact 17 is provided on one side of the moving contact 16. The moving contact 16 is rotatably connected to the actuator 15. A contact spring 18 is connected between the moving contact 16 and the actuator 15. An energy storage rod 19 is provided on one side of the moving contact 16. An overlapping portion 161 for fastening the energy storage rod 19 is provided on the moving contact 16. A trigger portion 191 is formed at the end of the energy storage rod 19 away from the overlapping portion 161. An energy storage spring 20 is connected to the outside of the trigger portion 191. A pressing portion 21 is provided on the handle 14 on one side of the trigger portion 191. The elastic force of the energy storage spring 20 is less than that of the handle spring.

[0071] When the handle 14 is in the open state, the overlapping part 161 and the energy storage rod 19 are separated from each other, the energy storage spring 20 and the trigger part 191 are attached to each other and drive the energy storage rod 19 to be in the contracted state, and the squeezing part 21 and the trigger part 191 are separated from each other.

[0072] When the handle 14 is in the initial rotation closing state, the handle 14 drives the actuator 15 to perform the closing action, and the moving contact 16 moves synchronously with the closing of the actuator 15. At the same time, the pressing part 21 moves towards the trigger part 191 as the handle 14 rotates to close the circuit.

[0073] When the handle 14 is rotated to the energy storage state, the overlapping part 161 engages with the energy storage rod 19 as the moving contact 16 moves, and there is a gap between the pressing part 21 and the triggering part 191; at this time, the moving contact 16 is limited by the engagement of the energy storage rod 19 and rotates relative to the actuator 15 as the actuator 15 subsequently closes, and the contact spring 18 contracts as the moving contact 16 and the actuator 15 rotate relative to each other;

[0074] When the handle 14 is rotated to the trigger state, the pressing part 21 rotates to fit against the trigger part 191, and the trigger part 191 is pressed by the subsequent rotation of the handle 14 to close the circuit. After being pressed, the trigger part 191 overcomes the elastic force of the energy storage spring 20 and drives the energy storage rod 19 to extend outward, thereby releasing the locking limit of the moving contact 16. After the limit is released, the moving contact 16 is rapidly rotated towards the stationary contact 17 by the elastic force of the contact spring 18 until it is completely fitted with the stationary contact 17.

[0075] When the handle 14 opens the gate, the compression part 21 separates from the energy storage rod 19 as the handle 14 opens the gate, and the energy storage spring 20 retracts the energy storage rod 19 after rebounding, thus completing the reset of the energy storage rod 19.

[0076] The energy storage spring 20 is rotatably connected to the handle 14 and one end is fastened to the circuit breaker housing 1, while the other end of the energy storage spring 20 is fastened to the energy storage rod 19.

[0077] The handle 14 has an arc-shaped drive groove 22 on one side. The trigger part 191 extends into the drive groove 22 and is fastened to the energy storage spring 20. The squeezing part 21 is the end sidewall of the drive groove 22. The squeezing part 21 and the energy storage spring 20 are located on the left and right sides of the trigger part 191, respectively.

[0078] The handle 14 and the actuator 15 are connected by a U-shaped link 23, and the energy storage spring 20 and the drive groove 22 are both located on the side of the handle 14 away from the U-shaped link 23.

[0079] The circuit breaker housing 1 is provided with a slide rail 24 for slidingly connecting the energy storage rod 19. The energy storage rod 19 is fastened and connected in the slide rail 24. The slide rail 24 can limit the energy storage rod 19 so that the energy storage rod 19 can only move laterally within the slide rail 24.

[0080] Compared to Embodiment 1, this embodiment, through the structural cooperation of the moving contact 16, the energy storage rod 19, the energy storage spring 20, and the handle 14, allows the handle 14 and the actuator 15 to close the circuit breaker in the initial closed state in a conventional manner, with the moving contact 16 moving towards the end of the energy storage rod 19 as the actuator 15 closes. When the moving contact 16 rotates with the actuator 15 to engage with the energy storage rod 19, the energy storage rod 19 can limit the moving contact 16, preventing it from moving further with the actuator 15 and thus creating relative rotation between them. In this state, a safe distance is formed between the moving contact 16 and the stationary contact 17, preventing arc release.

[0081] After the moving contact 16 rotates relative to the actuator 15, it causes the contact spring 18 to contract, and the moving contact 16 enters the energy storage state. The pressing part 21 continues to rotate towards the trigger part 191 with the closing action of the handle 14. When the pressing part 21 rotates to be in contact with the trigger part 191, the subsequent closing action of the pressing part 21 will press the trigger part 191, causing the trigger part 191 to overcome the elastic force of the energy storage spring 20 and extend outward after being pressed, that is, to release the locking limit of the moving contact 16.

[0082] After the limit switch is released, the moving contact 16 rotates rapidly under the rebound action of the contact spring 18 until it comes into contact with the stationary contact 17. This coordination ensures that the final closing action of the moving contact 16 is driven by the contact spring 18, rather than by the handle 14. This effectively prevents the speed of the handle 14's closing action from affecting the movement of the moving contact 16, allowing the moving contact 16 to close quickly and thus reducing arc release.

Claims

1. A circuit breaker based on multiple air outlet channels, characterized in that: The circuit breaker includes a circuit breaker housing (1), an arc extinguishing mechanism (2) is provided in the middle of the circuit breaker housing (1), an air outlet mechanism is provided on one side of the arc extinguishing mechanism (2), and an exhaust port is provided on the circuit breaker housing (1) outside the air outlet mechanism. The air outlet mechanism includes an arc-blocking member (3) that is fastened and connected inside the circuit breaker housing (1). A wire clamp (4) is detachably connected to the middle of the arc-blocking member (3). Two symmetrical air outlet chambers (5) are formed between the side wall of the arc-blocking member (3) and the two sides of the circuit breaker housing (1). The inner end of the air outlet chamber (5) is connected to the air outlet of the arc extinguishing mechanism (2), and the outer end of the air outlet chamber (5) is connected to the exhaust port. The arc-blocking component (3) has several spaced air guide plates (6) at one end near the arc-extinguishing mechanism (2), and an air guide groove (7) is formed between adjacent air guide plates (6) for ventilation. After the arc gas of the arc-extinguishing mechanism (2) is discharged, it enters the gas outlet chamber (5) through the air guide groove (7). The air guide plate (6) includes a first air guide plate (601) and a second air guide plate (602) located in the two air outlet chambers (5) respectively. The first air guide plate (601) and the second air guide plate (602) are staggered vertically along the height direction of the arc blocking member (3). The arc extinguishing mechanism (2) is provided with multiple arc extinguishing grids arranged side by side. An arc extinguishing channel is formed between adjacent arc extinguishing grids. The arc gas in the adjacent arc extinguishing channel is separated by the first air guide plate (601) and the second air guide plate (602) and then enters the two air outlet chambers (5) respectively. It also includes a handle (14) and an actuator (15) located inside the circuit breaker housing (1) and connected to each other. A handle spring is connected to the handle (14), and a moving contact (16) is connected to the actuator (15). A stationary contact (17) is provided on one side of the moving contact (16). The moving contact (16) is rotatably connected to the actuator (15). A contact spring (18) is connected between the moving contact (16) and the actuator (15). An energy storage rod (19) is provided on one side of the moving contact (16). An overlapping part (161) for fastening the energy storage rod (19) is provided on the moving contact (16). A trigger part (191) is formed at the end away from the overlapping part (161) of the energy storage rod (19). An energy storage spring (20) is connected to the outside of the trigger part (191). A pressing part (21) is provided on the handle (14) on one side of the trigger part (191). The elastic force of the energy storage spring (20) is less than that of the handle spring. The energy storage spring (20) is rotatably connected to the handle (14) and one end is fastened to the circuit breaker housing (1), while the other end of the energy storage spring (20) is fastened to the energy storage rod (19). The handle (14) has an arc-shaped drive groove (22) on one side. The trigger part (191) extends into the drive groove (22) and is fastened to the energy storage spring (20). The squeezing part (21) is the end sidewall of the drive groove (22). The squeezing part (21) and the energy storage spring (20) are located on the left and right sides of the trigger part (191), respectively. The handle (14) and the actuator (15) are connected to each other via a U-shaped link (23), and the energy storage spring (20) and the drive groove (22) are both located on the side of the handle (14) away from the U-shaped link (23); The circuit breaker housing (1) is provided with a slide rail (24) for sliding connection of the energy storage rod (19). The energy storage rod (19) is fastened and connected in the slide rail (24). The slide rail (24) can limit the energy storage rod (19) so that the energy storage rod (19) can only move laterally in the slide rail (24).

2. The circuit breaker based on multiple air outlet channels according to claim 1, characterized in that: The air outlet chamber (5) is provided with a first partition (8) with several matching air guide grooves (7) spaced apart. The outer side of the first partition (8) is in contact with the air guide plate (6). The different air guide grooves (7) in the air outlet chamber (5) are separated from each other by the first partition (8) and the air guide plate (6).

3. The circuit breaker based on multiple air outlet channels according to claim 1, characterized in that: The exhaust port includes a first exhaust port (9) and a second exhaust port (10) respectively disposed on the circuit breaker housing (1). The exhaust chamber (5) includes a first exhaust chamber (501), a second exhaust chamber (502), a third exhaust chamber (503) and a fourth exhaust chamber (504) separated from each other. One side of the first exhaust chamber (501), the second exhaust chamber (502), the third exhaust chamber (503) and the fourth exhaust chamber (504) are respectively connected to a portion of the exhaust port of the arc extinguishing mechanism (2). The outside of the first exhaust chamber (501) and the second exhaust chamber (502) is connected to the first exhaust port (9), and the outside of the third exhaust chamber (503) and the fourth exhaust chamber (504) is connected to the second exhaust port (10).

4. The circuit breaker based on multiple air outlet channels according to claim 3, characterized in that: The air outlet chamber (5) is provided with a second partition (11) that connects to the circuit breaker housing (1). The second air outlet chamber (502) and the third air outlet chamber (503) are formed on both sides of the second partition (11).

5. The circuit breaker based on multiple air outlet channels according to claim 3, characterized in that: The first exhaust chamber (501) and the second exhaust chamber (502) are separated from each other by the arc-blocking member (3) and the circuit breaker housing (1) at one end near the arc-extinguishing mechanism (2). The other ends of the first exhaust chamber (501) and the second exhaust chamber (502) are connected to each other. The first exhaust port (9) is located at the end of the first exhaust chamber (501). The arc gas in the second exhaust chamber (502) is discharged outward by passing through the first exhaust chamber (501) and the first exhaust port (9) in sequence.

6. The circuit breaker based on multiple air outlet channels according to claim 5, characterized in that: The first exhaust port (9) has an arc-extinguishing plate (12) that can be detachably connected to the circuit breaker housing (1) in the first exhaust chamber (501). The arc gas in the first exhaust chamber (501) and the second exhaust chamber (502) is discharged outward through the arc-extinguishing plate (12) during exhaust.

7. The circuit breaker based on multiple air outlet channels according to claim 3, characterized in that: An exhaust channel (13) is formed inside the second exhaust port (10). The third exhaust chamber (503) and the fourth exhaust chamber (504) are separated from each other by the arc-blocking member (3) and the circuit breaker housing (1) at one end near the arc-extinguishing mechanism (2). The other ends of the third exhaust chamber (503) and the fourth exhaust chamber (504) are connected to the exhaust channel (13).

8. The circuit breaker based on multiple air outlet channels according to claim 7, characterized in that: The end of the wire clamp (4) extends to the outside of the arc blocking member (3) and is located in the exhaust channel (13). The arc gas in the third exhaust chamber (503) and the fourth exhaust chamber (504) passes through the wire clamp (4) and enters the second exhaust port (10).

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