Arc extinguishing structure of circuit breaker

Abstract

The invention discloses a circuit breaker arc extinguishing structure, and relates to the technical field of vacuum circuit breakers, the circuit breaker arc extinguishing structure comprises a circuit breaker body, a self-checking mechanism is arranged above the circuit breaker body, and a replacement mechanism is arranged on the outer side of the circuit breaker body; the self-checking mechanism comprises an abrasion self-checking unit, the abrasion self-checking unit is arranged on the outer side of the circuit breaker body, and the abrasion self-checking unit can check the abrasion degree of a contact in the circuit breaker body; the self-checking mechanism further comprises a sealing self-checking unit, the sealing self-checking unit is arranged above the circuit breaker body, the sealing self-checking unit is used in cooperation with the abrasion self-checking unit, and the sealing self-checking unit can find the leakage problem of the circuit breaker body in time; the replacement mechanism is arranged on the outer side of the circuit breaker body, and according to the arc extinguishing structure of the circuit breaker, through mutual cooperation of the replacement mechanism, the abrasion self-checking unit and the sealing self-checking unit, the problem that a worker needs to check the device regularly when the device is used can be effectively avoided.

Description

Technical Field

[0001] The invention relates to the technical field of vacuum circuit breakers, in particular to an arc extinguishing structure of a circuit breaker. Background Art

[0002] Vacuum circuit breakers have the ability to open and close circuits in a vacuum environment and are widely used in power systems for overload protection, short-circuit protection, and controlling the on / off status of circuits. The core component of a vacuum circuit breaker is a vacuum extinguishing structure, which uses the excellent insulation and arc extinguishing characteristics of a vacuum to achieve rapid power outages. When the circuit breaker is operated, the contacts separate to generate an arc. Due to the scarcity of gas molecules in a vacuum environment, the arc cools quickly, thereby achieving arc extinguishing.

[0003] At present, the existing vacuum arc extinguishing structure does not have a self-test function when in use. With the passage of time, the sealing material of the arc extinguishing chamber may age due to thermal cycles, ultraviolet radiation or other environmental factors, and lose its original elasticity and sealing performance. Vacuum leakage will cause the vacuum degree inside the vacuum arc extinguishing mechanism to decrease, affecting the arc extinguishing ability and pressure resistance level. In addition, the contacts of the vacuum extinguishing mechanism will also wear during use. When the contacts are worn to a certain extent, they need to be replaced to ensure the normal operation of the circuit breaker and the safety of the system. Therefore, during the use of the vacuum arc extinguishing mechanism, staff are required to regularly check the sealing and wear of the vacuum arc extinguishing mechanism.

[0004] Combining the above problems, it is found that it is difficult to avoid the above problems at the same time when using the existing arc extinguishing structures of circuit breakers on the market, and even if they can be solved, they need to be solved through external tools, which makes it impossible to achieve the desired effect. Therefore, a circuit breaker arc extinguishing structure is proposed. Summary of the invention

[0005] The object of the present invention is to provide an arc extinguishing structure for a circuit breaker to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions: an arc extinguishing structure of a circuit breaker, comprising a circuit breaker body, a self-checking mechanism is arranged above the circuit breaker body, and a replacement mechanism is arranged outside the circuit breaker body;

[0007] The self-checking mechanism comprises a wear self-checking unit, which is arranged outside the circuit breaker body and can check the wear degree of the contacts in the circuit breaker body;

[0008] The self-inspection mechanism further comprises a sealing self-inspection unit, which is arranged above the circuit breaker body and is used in conjunction with the wear self-inspection unit. The sealing self-inspection unit can timely detect leakage problems of the circuit breaker body;

[0009] The replacement mechanism is arranged on the outside of the circuit breaker body, and cooperates with the self-checking mechanism. The replacement mechanism facilitates the removal of parts around the seal and the replacement of the seal.

[0010] Preferably, the wear self-check unit comprises three first sealed cabins, the inner wall of each of the first sealed cabins is fixedly connected with a first conductive block, the bottom end of each of the first conductive blocks is fixedly connected with a first contact, the inner wall of each of the first sealed cabins is fixedly connected with a telescopic seal, the inner wall of each of the telescopic seals is fixedly connected with a second conductive block, the upper surface of each of the second conductive blocks is fixedly connected with a second contact, the upper surface of each of the second contacts is in contact with the bottom surface of the first contact, the outer surface of each of the second contacts is fixedly connected with a guide block, the upper surface of the circuit breaker body is fixedly connected with three second sealed cabins, the inner wall of each of the second sealed cabins is fixedly connected to the outer surface of the second conductive block, the front of the circuit breaker body is fixedly connected with a support plate, the front of the support plate is fixedly connected with a fixed frame, the upper surface of the support plate is fixedly connected with two force springs, the top ends of the two force springs are commonly fixedly connected with a lifting plate, the inner wall of the lifting plate is rotatably connected with two first rotating shafts, the outer surface of each of the first rotating shafts is fixedly connected with a first rotating cylinder, each The outer surface of the first rotating cylinder is in contact with the front of the circuit breaker body. The back of the lifting plate is fixedly connected with a connecting block. The inner wall of the connecting block is rotatably connected with two second rotating shafts. The outer surface of each second rotating shaft is fixedly connected with a second rotating cylinder. The front of the circuit breaker body is fixedly connected with a first limit frame and a second limit frame. The inner wall of the first limit frame is in contact with the outer surfaces of the two second rotating cylinders. The inner wall of the second limit frame is rotatably connected with two short shafts. The outer surface of each short shaft is fixedly connected with a limit cylinder. The upper surface of the lifting plate is fixedly connected with a transmission plate. The two side surfaces of the transmission plate are respectively in contact with the outer surfaces of the two limit cylinders. The inner wall of the transmission plate is fixedly connected with a supporting roller. The right side of the transmission plate is fixedly connected with a first laser signal receiver. A self-inspection box is arranged above the circuit breaker body. The inner wall of the self-inspection box is fixedly connected with a first laser signal transmitter. The outer surface of the transmission plate is slidably connected to the inside of the self-inspection box. The upper surface of the self-inspection box is respectively fixedly connected with a controller and a protective shell. The upper surface of the protective shell is fixedly connected with a warning light.

[0011] Preferably, the sealed self-inspection unit includes a movable frame, the back side of the movable frame contacts the front side of the fixed frame, the upper surface and the bottom surface of the movable frame contact the bottom surface of the first sealed cabin and the upper surface of the second sealed cabin respectively, the upper surface of the movable frame is fixedly connected to two connecting pipes, the top end of each connecting pipe is fixedly connected to the bottom surface of the self-inspection box, the top end of each connecting pipe is fixedly connected to a fluorophosphate glass tube, the interior of each fluorophosphate glass tube and the interior of the connecting pipe are commonly provided with a blocking block, the inner wall of the self-inspection box is fixedly connected to a second laser signal receiver, the left side surface of the circuit breaker body is fixedly connected to a fixing seat, the inner wall of the fixing seat is fixedly connected to an air pump, the input end of the air pump is fixedly connected to an air inlet pipe, the output end of the air pump is fixedly connected to an air outlet pipe, and the bottom end of the air outlet pipe is fixedly connected to the upper surface of the fixed frame.

[0012] Preferably, a filter box is fixedly connected to the left side surface of the circuit breaker body, and a filter screen is clamped inside the filter box.

[0013] Preferably, the inner wall of the filter box is rotatably connected with a rotating shaft, the top end of each rotating shaft is fixedly connected with a rotating plate, and the bottom surface of each rotating plate is in contact with the upper surface of the filter screen.

[0014] Preferably, the replacement mechanism includes two first fixed blocks, the inner wall of each of the first fixed blocks is threadedly connected to a threaded shaft, the two side surfaces of the movable frame are fixedly connected to second fixed blocks, the inner wall of each of the second fixed blocks is rotatably connected to the outer surface of the threaded shaft, the inner wall of the movable frame is rotatably connected to a driving shaft, the outer surface of the driving shaft and the outer surfaces of the two threaded shafts are jointly fixedly connected to two gear transmission belt sets, the front side of the fixed frame is fixedly connected to a sealing strip, the front side of the sealing strip is in contact with the back side of the movable frame, the upper surface of the movable frame is fixedly connected to three disassembly cabins, and the outer surface of each disassembly cabin is in contact with the inner wall of the first sealing cabin.

[0015] Preferably, two sliding plates are fixedly connected to the upper surface of the circuit breaker body, and the upper surface of each sliding plate is in contact with the bottom surface of the movable frame.

[0016] Preferably, two movable doors are rotatably hinged on the back of the circuit breaker body, and the side surfaces of the two first fixing blocks close to each other are fixedly connected to the two side surfaces of the support plate respectively.

[0017] Preferably, a ventilating cylinder is fixedly connected to the inner wall of the circuit breaker body, and a filter plate is fixedly connected to the inner wall of the ventilating cylinder.

[0018] Preferably, the inner wall of the ventilation duct is fixedly connected to a cross plate, and the bottom surface of the cross plate is fixedly connected to a fan.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The present invention is provided with a wear self-checking unit, which can be used to self-check the wear of the conductive contacts in the circuit breaker body at all times, so as to ensure that when the contacts are worn to a certain extent, the wear self-checking unit can send an alarm to the outside world, thereby achieving the purpose of automatic detection.

[0021] 2. The present invention is provided with a sealing self-inspection unit, which can be used to self-inspect the sealing condition inside the first sealing cabin. The sealing self-inspection unit and the wear self-inspection unit cooperate with each other to check the circuit breaker body at all times, thereby eliminating the tedious work of workers regularly checking the circuit breaker body.

[0022] 3. The present invention provides a replacement mechanism, by which damaged seals can be easily replaced. By providing the replacement mechanism, the wear self-inspection unit and the seal self-inspection unit to cooperate with each other, it can effectively avoid the problem that workers need to regularly inspect the device when the device is in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 It is a structural schematic diagram of the air pump of the present invention;

[0025] Figure 3 For the present invention Figure 2 A partial enlarged view of the middle A;

[0026] Figure 4 It is a structural schematic diagram of the ventilator of the present invention;

[0027] Figure 5 For the present invention Figure 4 A partial enlarged view of point B in the middle;

[0028] Figure 6 It is a structural schematic diagram of the mobile frame of the present invention;

[0029] Figure 7 For the present invention Figure 6 A partial enlarged view of point C in the middle;

[0030] Figure 8 It is a structural schematic diagram of the lifting plate of the present invention;

[0031] Fig. 9 It is a structural schematic diagram of the connection block of the present invention;

[0032] Fig.10 is a schematic structural diagram of a first laser signal receiver of the present invention;

[0033] Fig.11 It is a structural schematic diagram of the threaded shaft of the present invention;

[0034] Fig.12 It is a structural schematic diagram of the first fixing block of the present invention;

[0035] Fig.13 It is a structural schematic diagram of the filter screen of the present invention.

[0036] In the figure: 1, circuit breaker body; 2, self-checking mechanism; 21, wear self-checking unit; 2101, warning light; 2102, protective shell; 2103, self-checking box; 2104, fixed frame; 2105, controller; 2106, second sealed cabin; 2107, transmission plate; 2108, first laser signal transmitter; 2109, second laser signal receiver; 2110, first laser signal receiver; 2111, support roller; 2112, first rotating cylinder; 2113, first limit frame; 2114, first conductive block; 2115, first contact; 2116, second contact; 2117, second conductive block; 2118, telescopic seal; 2119, guide block; 2120, force spring; 2121, connecting block; 2122, first rotating shaft; 2123, support plate; 2124, lifting plate; 2125, second rotating cylinder; 2126, second rotating shaft; 2127, second limiting frame; 2128, limiting cylinder; 2129, short shaft; 2130, first sealed cabin; 22, sealing self-test unit; 2201, air pump; 2202, fixed seat; 2203, air outlet pipe; 2204, fluorophosphate glass tube; 2205, connecting pipe; 2206, shielding block; 2207, moving frame; 2208, rotating plate; 2209, filter screen ; 2210, rotating shaft; 2211, filter box; 2212, air intake pipe; 3, replacement mechanism; 301, disassembly cabin; 302, ventilator; 303, movable door; 304, filter plate; 305, cross plate; 306, fan; 307, first fixed block; 308, threaded shaft; 309, second fixed block; 310, gear belt set; 311, drive shaft; 312, sliding plate; 313, sealing strip. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] Example 1: Please refer to Figure 1 , Figure 2 , Figure 4 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 , Fig.11 and Fig.12 , the present invention provides a technical solution: a circuit breaker arc extinguishing structure, comprising a circuit breaker body 1, a self-test mechanism 2 is arranged above the circuit breaker body 1, and a replacement mechanism 3 is arranged outside the circuit breaker body 1;

[0039] The self-checking mechanism 2 comprises a wear self-checking unit 21 . The wear self-checking unit 21 is arranged outside the circuit breaker body 1 . The wear self-checking unit 21 can check the wear degree of the contacts in the circuit breaker body 1 .

[0040] As a further limitation of the self-inspection mechanism 2 of the present invention, the wear self-inspection unit 21 includes three first sealed cabins 2130, the inner wall of each first sealed cabin 2130 is fixedly connected with a first conductive block 2114, the bottom end of each first conductive block 2114 is fixedly connected with a first contact 2115, the inner wall of each first sealed cabin 2130 is fixedly connected with a telescopic seal 2118, the inner wall of each telescopic seal 2118 is fixedly connected with a second conductive block 2117, the upper surface of each second conductive block 2117 is fixedly connected with a second contact 2116, the upper surface of each second contact 2116 is in contact with the bottom surface of the first contact 2115, and the outer surface of each second contact 2116 is fixedly connected with a guide block 2119. The upper surface of the circuit breaker body 1 is fixedly connected with three second sealed cabins 2106, the inner wall of each second sealed cabin 2106 is fixedly connected to the outer surface of the second conductive block 2117, the front of the circuit breaker body 1 is fixedly connected with a support plate 2123, the front of the support plate 2123 is fixedly connected with a fixed frame 2104, the upper surface of the support plate 2123 is fixedly connected with two force springs 2120, the tops of the two force springs 2120 are fixedly connected with a lifting plate 2124, the inner wall of the lifting plate 2124 is rotatably connected with two first rotating shafts 2122, the outer surface of each first rotating shaft 2122 is fixedly connected with a first rotating cylinder 2112, and the outer surface of each first rotating cylinder 2112 is in contact with the front of the circuit breaker body 1 The back of the lifting plate 2124 is fixedly connected with a connecting block 2121, and the inner wall of the connecting block 2121 is rotatably connected with two second rotating shafts 2126, and the outer surface of each second rotating shaft 2126 is fixedly connected with a second rotating cylinder 2125, and the front of the circuit breaker body 1 is fixedly connected with a first limiting frame 2113 and a second limiting frame 2127, and the inner wall of the first limiting frame 2113 contacts the outer surfaces of the two second rotating cylinders 2125, and the inner wall of the second limiting frame 2127 is rotatably connected with two short shafts 2129, and the outer surface of each short shaft 2129 is fixedly connected with a limiting cylinder 2128, and the upper surface of the lifting plate 2124 is fixedly connected with a transmission plate 2107, and the two side surfaces of the transmission plate 2107 are respectively connected with the two limiting cylinders 212 8, the inner wall of the transmission plate 2107 is fixedly connected with a support roller 2111, the right side of the transmission plate 2107 is fixedly connected with a first laser signal receiver 2110, a self-inspection box 2103 is arranged above the circuit breaker body 1, the inner wall of the self-inspection box 2103 is fixedly connected with a first laser signal transmitter 2108, the outer surface of the transmission plate 2107 is slidably connected to the inside of the self-inspection box 2103, the upper surface of the self-inspection box 2103 is respectively fixedly connected with a controller 2105 and a protective shell 2102, the upper surface of the protective shell 2102 is fixedly connected with a warning light 2101, by setting a wear self-inspection unit 21, the wear self-inspection unit 21 can be used to self-inspect the wear of the conductive contacts in the circuit breaker body 1 at all times,This ensures that when the contact wears to a certain extent, the wear self-detection unit 21 can send an alarm to the outside world, thus achieving the purpose of automatic detection.

[0041] The specific implementation of this embodiment is as follows: the first contact 2115 is a fixed contact, and the second contact 2116 is a movable contact. Therefore, whenever the circuit breaker trips and the power is cut off, the second contact 2116 is driven to move by the transmission structure of the circuit breaker body 1. This is the prior art, so it is not described in detail. Whenever the first contact 2115 and the second contact 2116 are worn to a certain thickness and contact each other, it means that the guide block 2119 fixed on the outer surface of the second contact 2116 will move upward by a distance of double the wear thickness compared to the initial position, and the guide block 2119 will move upward by a distance of double the wear thickness when the power is on. When the lifting plate 2124 moves upward, it will be magnetic, so it can drive the iron lifting plate 2124 to move upward. At this time, the lifting plate 2124 will push the transmission plate 2107 to move upward. During the upward movement, the transmission plate 2107 will push the first laser signal receiver 2110 fixed on the right side to move upward together. At this time, since the first contact 2115 and the second contact 2116 are less worn, the first laser signal receiver 2110 cannot be completely moved to the inside of the self-inspection box 2103, so the first laser signal receiver 2110 cannot receive the first laser signal transmitter 2110. 08. In addition, since the guide block 2119 is not energized and does not have magnetism, whenever the guide block 2119 has magnetism, it is located obliquely above the lifting plate 2124. The magnetic force on the lifting plate 2124 comes from the oblique upper part, so when the lifting plate 2124 rises, it moves upward and horizontally at the same time. In order to avoid friction between the lifting plate 2124 and the first sealed cabin 2130, the connecting block 2121, the second rotating shaft 2126 and the second rotating cylinder 2125 fixed on the back of the lifting plate 2124 can provide a limit for the lifting plate 2124, and the transmission plate 210 7 will also be restricted by the limit tube 2128 and can only move vertically upward or downward. According to this principle, when the second contact 2116 and the first contact 2115 reach the wear limit, the transmission plate 2107 will push the first laser signal receiver 2110 to move to the inside of the self-inspection box 2103 and be in front of the first laser signal transmitter 2108. As a result, the first laser signal receiver 2110 can receive the laser signal and transmit the electrical signal to the controller 2105 through the wire. The controller 2105 also uses the electrical signal to control the operation of the warning light 2101, thereby issuing a warning to the outside world.

[0042] Example 2: Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 5 , Figure 6 , Fig.12 and Fig.13 The present invention provides a technical solution: an arc extinguishing structure for a circuit breaker. The present invention makes corresponding improvements to the technical problems mentioned in the background technology. The self-inspection mechanism 2 also includes a sealing self-inspection unit 22. The sealing self-inspection unit 22 is arranged above the circuit breaker body 1. The sealing self-inspection unit 22 is used in conjunction with the wear self-inspection unit 21. The sealing self-inspection unit 22 can promptly detect the problem of leakage of the circuit breaker body 1.

[0043] As a further limitation of the self-inspection mechanism 2 of the present invention, the sealed self-inspection unit 22 includes a moving frame 2207, the back of the moving frame 2207 contacts the front of the fixed frame 2104, the upper surface and the bottom surface of the moving frame 2207 contact the bottom surface of the first sealed cabin 2130 and the upper surface of the second sealed cabin 2106 respectively, the upper surface of the moving frame 2207 is fixedly connected with two connecting tubes 2205, the top of each connecting tube 2205 is fixedly connected to the bottom surface of the self-inspection box 2103, the top of each connecting tube 2205 is fixedly connected with a fluorophosphate glass tube 2204, the interior of each fluorophosphate glass tube 2204 and the interior of the connecting tube 2205 are jointly provided with a shielding block 2206, and the inner wall of the self-inspection box 2103 is fixedly connected. A second laser signal receiver 2109 is fixedly connected to the left side of the circuit breaker body 1, a fixing seat 2202 is fixedly connected to the inner wall of the fixing seat 2202, an air pump 2201 is fixedly connected to the input end of the air pump 2201, an air inlet pipe 2212 is fixedly connected to the output end of the air pump 2201, and an air outlet pipe 2203 is fixedly connected to the bottom end of the air outlet pipe 2203. The upper surface of the fixed frame 2104, by providing a sealing self-inspection unit 22, the sealing self-inspection unit 22 can be used to self-inspect the sealing condition inside the first sealing cabin 2130. The sealing self-inspection unit 22 and the wear self-inspection unit 21 cooperate with each other to check the circuit breaker body 1 at any time, thereby eliminating the tedious work of workers regularly checking the circuit breaker body 1.

[0044] See also Fig.13 A filter box 2211 is fixedly connected to the left side of the circuit breaker body 1, and a filter screen 2209 is clamped inside the filter box 2211. By providing the filter box 2211 and the filter screen 2209, the filter screen 2209 can be used to filter the air entering the filter box 2211, thereby reducing the probability of dust entering the telescopic seal 2118 and avoiding the telescopic seal 2118 to telescope back and forth, and the presence of dust will increase its wear.

[0045] See also Fig.13The inner wall of the filter box 2211 is rotatably connected to a rotating shaft 2210, and the top of each rotating shaft 2210 is fixedly connected to a rotating plate 2208. The bottom surface of each rotating plate 2208 is in contact with the upper surface of the filter screen 2209. By providing the rotating shaft 2210 and the rotating plate 2208, the position of the rotating plate 2208 can be adjusted by using the rotating shaft 2210, thereby achieving the purpose of limiting the filter screen 2209.

[0046] The specific implementation of this embodiment is as follows: when the sealing self-test unit 22 needs to be activated, the air pump 2201 needs to be controlled to inject air into the interior of the fixed frame 2104, and the space between the fixed frame 2104 and the movable frame 2207 is interconnected, so the entry of gas will increase the air pressure inside the fixed frame 2104, the movable frame 2207 and the connecting pipe 2205. Under the action of the air pressure, the blocking block 2206 will be between the first laser signal transmitter 2108 and the second laser signal receiver 2109, so the laser signal emitted by the first laser signal transmitter 2108 cannot be received by the second laser signal receiver 2109. When the telescopic seal 2118 inside the first sealed cabin 2130 is damaged, the space inside the first sealed cabin 2130 will be connected with the fixed frame 2104, the movable frame 2207 and the connecting pipe 2205 space. The air pressure inside the movable frame 2207 and the connecting tube 2205 will decrease, and the shielding block 2206 will move downward, so that the laser signal emitted by the first laser signal transmitter 2108 can be received by the second laser signal receiver 2109. It should be understood here that the fluorophosphate glass tube 2204 is located between the first laser signal transmitter 2108 and the second laser signal receiver 2109, and the fluorophosphate glass tube 2204 is a special type of glass with fluorophosphate as the matrix, which has excellent physical and chemical properties. This glass usually has high light transmittance, low phonon energy, good chemical stability and excellent optical uniformity, so it can reduce the refractive index of the laser signal. The second laser signal receiver 2109 will also transmit the electrical signal to the controller 2105 through the wire, and the controller 2105 also uses the electrical signal to control the operation of the warning light 2101.

[0047] Example 3: Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Fig.11 and Fig.12 The present invention provides a technical solution: an arc extinguishing structure for a circuit breaker. The present invention makes corresponding improvements to the technical problems mentioned in the background technology. A replacement mechanism 3 is arranged on the outside of the circuit breaker body 1. The replacement mechanism 3 cooperates with the self-inspection mechanism 2. The replacement mechanism 3 facilitates the disassembly of parts around the seal and the replacement of the seal.

[0048] As a further limitation of the replacement mechanism 3 of the present invention, the replacement mechanism 3 includes two first fixed blocks 307, the inner wall of each first fixed block 307 is threadedly connected to a threaded shaft 308, the two side surfaces of the movable frame 2207 are fixedly connected to second fixed blocks 309, the inner wall of each second fixed block 309 is rotatably connected to the outer surface of the threaded shaft 308, the inner wall of the movable frame 2207 is rotatably connected to a driving shaft 311, the outer surface of the driving shaft 311 and the outer surfaces of the two threaded shafts 308 are fixedly connected to two gear transmission belt sets 310, and the front surface of the fixed frame 2104 is fixed A sealing strip 313 is fixedly connected, and the front side of the sealing strip 313 contacts the back side of the movable frame 2207. Three disassembly chambers 301 are fixedly connected to the upper surface of the movable frame 2207. The outer surface of each disassembly chamber 301 contacts the inner wall of the first sealing chamber 2130. By setting up a replacement mechanism 3, the damaged sealing parts can be conveniently replaced by using the replacement mechanism 3. By setting up the replacement mechanism 3, the wear self-inspection unit 21 and the sealing self-inspection unit 22, the problem of workers needing to regularly inspect the device when it is in use can be effectively avoided.

[0049] See also Figure 6 Two sliding plates 312 are fixedly connected to the upper surface of the circuit breaker body 1, and the upper surface of each sliding plate 312 is in contact with the bottom surface of the moving frame 2207. By providing the sliding plate 312 and the rotating structure on the upper surface of the sliding plate 312, it can ensure that the moving frame 2207 is provided with support force during installation and disassembly, and can reduce the friction between the moving frame 2207 and the sliding plate 312.

[0050] See also Figure 1 Two movable doors 303 are rotatably hinged on the back of the circuit breaker body 1, and the sides of the two first fixed blocks 307 close to each other are fixedly connected to the two sides of the support plate 2123 respectively. By providing the movable doors 303, the space inside the circuit breaker body 1 can be protected to prevent dust from entering the inside of the circuit breaker body 1 and causing damage to the internal power facilities.

[0051] See also Figure 1 A ventilating tube 302 is fixedly connected to the inner wall of the circuit breaker body 1, and a filter plate 304 is fixedly connected to the inner wall of the ventilating tube 302. By providing the ventilating tube 302 and the filter plate 304, the ventilating tube 302 can improve the heat dissipation efficiency of the circuit breaker body 1, and the filter plate 304 can filter dust in the air.

[0052] See also Figure 4The inner wall of the ventilation duct 302 is fixedly connected to a cross plate 305, and the bottom surface of the cross plate 305 is fixedly connected to a fan 306. By providing the cross plate 305 and the fan 306, the fan 306 can drive the outside air into the ventilation duct 302, thereby increasing its heat dissipation effect.

[0053] The specific implementation of this embodiment is as follows: each time the device is connected, the first contact 2115 and the second contact 2116 will be worn, and in this application, the first contact 2115 is a fixed contact and the second contact 2116 is a movable contact. Therefore, each time the circuit breaker trips and the power is cut off, the second contact 2116 is driven to move by the transmission structure of the circuit breaker body 1. This is the prior art, so it is not described in detail. Each time the first contact 2115 and the second contact 2116 are worn to a certain thickness and contact each other, it means that the guide block 2119 fixed on the outer surface of the second contact 2116 will move upward by a distance twice the wear thickness compared to the initial position, and the guide block 2119 will have a function when the power is on. Magnetism, therefore, can drive the iron lifting plate 2124 to move upward, at this time, the lifting plate 2124 will push the transmission plate 2107 to move upward when moving upward, and the transmission plate 2107 will push the first laser signal receiver 2110 fixed on the right side to move upward together during the upward movement. At this time, since the first contact 2115 and the second contact 2116 are less worn, the first laser signal receiver 2110 cannot be completely moved to the inside of the self-inspection box 2103, so the first laser signal receiver 2110 cannot receive the laser signal emitted by the first laser signal transmitter 2108. In addition, since the guide block 2119 is not energized and does not have magnetism, whenever the guide block 2119 has magnetism, it is on the lifting plate 2124. The lifting plate 2124 is subjected to a magnetic force from above, so the lifting plate 2124 will move upward and sideways when it rises. In order to avoid friction between the lifting plate 2124 and the first sealed cabin 2130, the connecting block 2121, the second rotating shaft 2126 and the second rotating cylinder 2125 fixed on the back of the lifting plate 2124 can provide a limit for the lifting plate 2124, and the transmission plate 2107 can only move vertically upward or downward under the restriction of the limit cylinder 2128. According to this principle, when the second contact 2116 and the first contact 2115 reach the wear limit, the transmission plate 2107 will push the first laser signal receiver 2110 to move to the inside of the self-inspection box 2103 and be in the first In front of the laser signal transmitter 2108, the first laser signal receiver 2110 can receive the laser signal and transmit the electrical signal to the controller 2105 through the wire. The controller 2105 also uses the electrical signal to control the operation of the warning light 2101, thereby issuing a warning to the outside world. When the sealing self-test unit 22 needs to be activated, it is necessary to control the air pump 2201 to inject air into the interior of the fixed frame 2104, and the space between the fixed frame 2104 and the movable frame 2207 is interconnected. Therefore, the entry of gas will increase the air pressure inside the fixed frame 2104, the movable frame 2207 and the connecting pipe 2205. Under the action of the air pressure, the blocking block 2206 will be between the first laser signal transmitter 2108 and the second laser signal receiver 2109.Therefore, the laser signal emitted by the first laser signal transmitter 2108 cannot be received by the second laser signal receiver 2109. When the telescopic seal 2118 inside the first sealed cabin 2130 is damaged, the space inside the first sealed cabin 2130 will be connected with the fixed frame 2104, the movable frame 2207 and the connecting tube 2205. Therefore, the air pressure inside the fixed frame 2104, the movable frame 2207 and the connecting tube 2205 will decrease, and the shielding block 2206 will move downward. Therefore, the laser signal emitted by the first laser signal transmitter 2108 can be received by the second laser signal receiver 2109. It should be understood here that the fluorophosphate glass tube 2204 is between the first laser signal transmitter 2108 and the second laser signal receiver 2109, and the fluorophosphate glass tube 2204 is a special type of glass with fluorophosphate as the matrix. , has excellent physical and chemical properties. This type of glass usually has high light transmittance, low phonon energy, good chemical stability and excellent optical uniformity, so the refractive index of the laser signal can be reduced. The second laser signal receiver 2109 will also transmit the electrical signal to the controller 2105 through the wire. The controller 2105 also uses the electrical signal to control the operation of the warning light 2101. When the damaged telescopic seal 2118 needs to be replaced, the driving shaft 311 is applied with a rotating force. Under the joint action of the two gear transmission belt groups 310, the rotating force received by the driving shaft 311 can be transmitted to the two threaded shafts 308, thereby driving the two threaded shafts 308 to rotate, thereby releasing the connection between the moving frame 2207 and the fixed frame 2104, thereby facilitating the replacement of the telescopic seal 2118. ,

[0054] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0055] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A circuit breaker arc extinguishing structure, comprising a circuit breaker body (1), characterized in that: A self-checking mechanism (2) is arranged above the circuit breaker body (1), and a replacement mechanism (3) is arranged outside the circuit breaker body (1); The self-checking mechanism (2) comprises a wear self-checking unit (21), the wear self-checking unit (21) being arranged outside the circuit breaker body (1), and the wear self-checking unit (21) being capable of checking the degree of wear of contacts in the circuit breaker body (1); The self-inspection mechanism (2) further comprises a sealing self-inspection unit (22), the sealing self-inspection unit (22) being arranged above the circuit breaker body (1), the sealing self-inspection unit (22) being used in conjunction with the wear self-inspection unit (21), and the sealing self-inspection unit (22) being able to promptly detect leakage problems of the circuit breaker body (1); The replacement mechanism (3) is arranged on the outside of the circuit breaker body (1); the replacement mechanism (3) cooperates with the self-test mechanism (2); the replacement mechanism (3) facilitates the removal of parts around the seal and the replacement of the seal.

2. The arc extinguishing structure of a circuit breaker according to claim 1, characterized in that: The wear self-checking unit (21) comprises three first sealed cabins (2130), the inner wall of each of the first sealed cabins (2130) is fixedly connected to a first conductive block (2114), the bottom end of each of the first conductive blocks (2114) is fixedly connected to a first contact (2115), the inner wall of each of the first sealed cabins (2130) is fixedly connected to a telescopic seal (2118), the inner wall of each of the telescopic seals (2118) is fixedly connected to a second conductive block (2117), the upper surface of each of the second conductive blocks (2117) is fixedly connected to a second contact (2116), the upper surface of each of the second contacts (2116) is in contact with the bottom surface of the first contact (2115), and each The outer surfaces of the second contacts (2116) are fixedly connected to guide blocks (2119); the upper surface of the circuit breaker body (1) is fixedly connected to three second sealed cabins (2106); the inner wall of each second sealed cabin (2106) is fixedly connected to the outer surface of the second conductive block (2117); the front surface of the circuit breaker body (1) is fixedly connected to a support plate (2123); the front surface of the support plate (2123) is fixedly connected to a fixing frame (2104); the upper surface of the support plate (2123) is fixedly connected to two force springs (2120); the top ends of the two force springs (2120) are fixedly connected to a lifting plate (2124); the inner wall of the lifting plate (2124) is rotated Two first rotating shafts (2122) are connected, the outer surface of each of the first rotating shafts (2122) is fixedly connected to a first rotating cylinder (2112), the outer surface of each of the first rotating cylinders (2112) is in contact with the front surface of the circuit breaker body (1), the back surface of the lifting plate (2124) is fixedly connected to a connecting block (2121), the inner wall of the connecting block (2121) is rotatably connected to two second rotating shafts (2126), the outer surface of each of the second rotating shafts (2126) is fixedly connected to a second rotating cylinder (2125), the front surface of the circuit breaker body (1) is fixedly connected to a first limiting frame (2113) and a second limiting frame (2127), the first limiting frame (2113) The inner wall is in contact with the outer surfaces of the two second rotating cylinders (2125); the inner wall of the second limit frame (2127) is rotatably connected to two short shafts (2129); the outer surface of each short shaft (2129) is fixedly connected to the limit cylinder (2128); the upper surface of the lifting plate (2124) is fixedly connected to a transmission plate (2107); the two side surfaces of the transmission plate (2107) are respectively in contact with the outer surfaces of the two limit cylinders (2128); the inner wall of the transmission plate (2107) is fixedly connected to a support roller (2111); the right side surface of the transmission plate (2107) is fixedly connected to a first laser signal receiver (2110); a self-inspection box (2103) is arranged above the circuit breaker body (1);The inner wall of the self-inspection box (2103) is fixedly connected with a first laser signal transmitter (2108), the outer surface of the transmission plate (2107) is slidably connected to the inside of the self-inspection box (2103), the upper surface of the self-inspection box (2103) is respectively fixedly connected with a controller (2105) and a protective shell (2102), and the upper surface of the protective shell (2102) is fixedly connected with a warning light (2101).

3. The arc extinguishing structure of a circuit breaker according to claim 2, characterized in that: The sealed self-inspection unit (22) comprises a movable frame (2207), the back side of the movable frame (2207) contacts the front side of the fixed frame (2104), the upper surface and the bottom surface of the movable frame (2207) contact the bottom surface of the first sealed cabin (2130) and the upper surface of the second sealed cabin (2106) respectively, the upper surface of the movable frame (2207) is fixedly connected with two connecting tubes (2205), the top end of each connecting tube (2205) is fixedly connected with the bottom surface of the self-inspection box (2103), the top end of each connecting tube (2205) is fixedly connected with a fluorophosphate glass tube (2204), and each fluorophosphate glass tube (2204) is fixedly connected with the bottom surface of the first sealed cabin (2130). The interior of the glass tube (2204) and the interior of the connecting tube (2205) are both provided with a shielding block (2206); the inner wall of the self-test box (2103) is fixedly connected to a second laser signal receiver (2109); the left side surface of the circuit breaker body (1) is fixedly connected to a fixing seat (2202); the inner wall of the fixing seat (2202) is fixedly connected to an air pump (2201); the input end of the air pump (2201) is fixedly connected to an air inlet pipe (2212); the output end of the air pump (2201) is fixedly connected to an air outlet pipe (2203); and the bottom end of the air outlet pipe (2203) is fixedly connected to the upper surface of the fixing frame (2104).

4. The arc extinguishing structure of a circuit breaker according to claim 1, characterized in that: A filter box (2211) is fixedly connected to the left side surface of the circuit breaker body (1), and a filter screen (2209) is clamped inside the filter box (2211).

5. The arc extinguishing structure of a circuit breaker according to claim 4, characterized in that: The inner wall of the filter box (2211) is rotatably connected to a rotating shaft (2210), and the top of each rotating shaft (2210) is fixedly connected to a rotating plate (2208), and the bottom surface of each rotating plate (2208) is in contact with the upper surface of the filter screen (2209).

6. The arc extinguishing structure of a circuit breaker according to claim 3, characterized in that: The replacement mechanism (3) comprises two first fixed blocks (307), the inner wall of each of the first fixed blocks (307) is threadedly connected to a threaded shaft (308), the two side surfaces of the moving frame (2207) are fixedly connected to second fixed blocks (309), the inner wall of each of the second fixed blocks (309) is rotatably connected to the outer surface of the threaded shaft (308), the inner wall of the moving frame (2207) is rotatably connected to a driving shaft (311), the outer surface of the driving shaft (311) and the outer surfaces of the two threaded shafts (308) are jointly fixedly connected to two gear transmission belt sets (310), the front surface of the fixed frame (2104) is fixedly connected to a sealing strip (313), the front surface of the sealing strip (313) is in contact with the back surface of the moving frame (2207), and the upper surface of the moving frame (2207) is fixedly connected to three disassembly chambers (301), the outer surface of each of the disassembly chambers (301) is in contact with the inner wall of the first sealing chamber (2130).

7. The arc extinguishing structure of a circuit breaker according to claim 3, characterized in that: Two sliding plates (312) are fixedly connected to the upper surface of the circuit breaker body (1), and the upper surface of each sliding plate (312) is in contact with the bottom surface of the moving frame (2207).

8. The arc extinguishing structure of a circuit breaker according to claim 6, characterized in that: Two movable doors (303) are rotatably hinged on the back of the circuit breaker body (1), and the side surfaces of the two first fixing blocks (307) close to each other are fixedly connected to the two side surfaces of the support plate (2123) respectively.

9. The arc extinguishing structure of a circuit breaker according to claim 1, characterized in that: A ventilating cylinder (302) is fixedly connected to the inner wall of the circuit breaker body (1), and a filter plate (304) is fixedly connected to the inner wall of the ventilating cylinder (302).

10. The arc extinguishing structure of a circuit breaker according to claim 9, characterized in that: The inner wall of the ventilation tube (302) is fixedly connected to a cross plate (305), and the bottom surface of the cross plate (305) is fixedly connected to a fan (306).

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