An outdoor circuit breaker

Abstract

An outdoor circuit breaker comprises a box body with a chamber inside, a plurality of vacuum poles arranged above the box body along the length direction of the box body, a permanent magnet mechanism arranged in the box body, a transmission assembly arranged in the box body and comprising a driving square shaft and at least four crank arms, three of which are arranged in linkage with the insulation pull rods of the vacuum poles and the other is arranged in linkage with the permanent magnet mechanism, two opening springs arranged symmetrically on both sides of the driving square shaft and connected with the driving square shaft through a first pin shaft, the first pin shaft extending outward at one end to form a first linkage shaft, and an indication assembly comprising an indication mark arranged on the surface of the box body and a rotatable pointer assembly, the pointer assembly comprising a pointer, a rotating shaft rotating synchronously with the pointer and a first shift fork arranged at the end of the rotating shaft, the first shift fork being arranged in linkage with the first linkage shaft. By simplifying the interior of the outdoor circuit breaker and utilizing the sharing of various parts, the number of parts is reduced, the interior is more compact, and the weight of the entire outdoor circuit breaker is reduced.

Description

Technical Field

[0001] This utility model relates to the field of outdoor vacuum circuit breakers, specifically to an outdoor circuit breaker. Background Technology

[0002] High-voltage circuit breakers (or high-voltage switches) can not only cut off or close the no-load current and load current in high-voltage circuits, but also cut off overload current and short-circuit current through the action of relay protection devices when a system fault occurs. They have a fairly complete arc-extinguishing structure and sufficient breaking capacity, and can be divided into: oil circuit breakers (multi-oil circuit breakers, low-oil circuit breakers), sulfur hexafluoride circuit breakers (SF6 circuit breakers), compressed air circuit breakers, vacuum circuit breakers, etc.

[0003] Since outdoor vacuum circuit breakers are installed outdoors or on poles, their weight affects their installation and relocation. Miniaturization and weight reduction are the development trends of outdoor vacuum circuit breakers. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide an outdoor circuit breaker.

[0005] To achieve the above objectives, the present invention provides the following technical solution: An outdoor circuit breaker, comprising: The box-shaped enclosure has internal chambers. Several vacuum poles are spaced apart above the housing along the length of the housing. The permanent magnet mechanism is housed within the enclosure. The transmission assembly is located inside the housing and includes a drive square shaft and at least four crank arms, three of which are linked to the insulating pull rod of the vacuum pole, while the other crank arms are linked to the permanent magnet mechanism. Two spring assemblies are symmetrically arranged on both sides of the drive shaft, and one end of each spring is connected to the drive shaft via a first pin. One end of the first pin extends outward to form a first linkage shaft. The indicator assembly includes an indicator mark disposed on the surface of the housing and a rotatable pointer assembly. The pointer assembly includes a pointer, a rotating shaft that rotates synchronously with the pointer, and a first shift fork disposed at the end of the rotating shaft. The first shift fork and a first linkage shaft are linked together.

[0006] The enclosure includes a U-shaped curved plate and side plates disposed at both ends of the U-shaped curved plate. The U-shaped curved plate and the side plates at both ends form a downward-opening chamber. The chamber contains: Two intermediate support plates are symmetrically arranged with respect to the center line of the box body along its length. Their upper ends are fixedly connected to a U-shaped bent plate. A gap is formed between the two intermediate support plates, through which the drive square shaft can pass. One end of each intermediate support plate is bent outward to form a connecting plate for fixing the permanent magnet mechanism. The intermediate support plates are respectively provided with a first guide groove and a second guide groove arranged perpendicularly to each other, wherein the first guide groove is arranged along the length direction. Two side support plates are set along the length of the box together with the middle support plate, and the two are located at the front and rear ends of the middle support plate respectively. Their upper ends are fixedly connected to the U-shaped bent plate. The cross-section of the side support plate is U-shaped, and both sides are provided with a vertically arranged third guide groove and a fourth guide groove.

[0007] The top of the chamber is provided with a first mounting plate that works in conjunction with the connecting plate.

[0008] The crank arm is connected to the drive shaft via a second pin, and any one of the second pins extends outward to form a second linkage shaft. An auxiliary switch is provided on the intermediate support plate, and the actuating end of the auxiliary switch is provided with a second shift fork. The second shift fork is linked to the second linkage shaft.

[0009] The permanent magnet mechanism is also equipped with a self-locking mechanism.

[0010] The permanent magnet mechanism has a moving iron core and a permanent magnet assembly arranged opposite each other, and the permanent magnet assembly has a semi-circular groove near the moving iron core. The self-locking mechanism includes: The half-shaft, and a portion thereof rests within the semi-circular groove. The operating handle is rotatably mounted on the outside of the housing and fixedly connected to the half-shaft. The operating handle has two positions: locked and unlocked. The half-shaft has a locked state in which it rotates relative to the semi-circular groove and forms a misalignment with the semi-circular groove to restrict the reset of the moving iron core when the operating handle is in the locked position, and an unlocked state in which it rotates relative to the semi-circular groove to release the restriction on the moving iron core when the operating handle is in the unlocked position.

[0011] The self-locking mechanism also includes a locking mechanism.

[0012] The locking mechanism includes a fixing member fixedly connected to the half shaft, a locking member with one end hinged to the fixing member, a guide groove at the other end of the locking member, and the other end of the locking member is connected to the middle support plate of the housing through a third pin. The third pin is slidably disposed in the guide groove, and a spring is provided between the locking member and the third pin.

[0013] The vacuum electrode includes: Insulating sleeve with built-in vacuum interrupter; An upper conductive rod is disposed on the upper side of the insulating sleeve and connected to one end of the vacuum interrupter; The lower conductive rod is positioned perpendicular to the insulating sleeve. A shielding cover is installed inside the insulating sleeve, and its upper end is provided with a through hole communicating with the vacuum interrupter, and its side is provided with a through hole through which the lower conductive rod can pass. A flexible connection assembly is disposed inside the shielding cover and is connected to the other end of the vacuum interrupter and the lower conductive rod, respectively. An insulating tie rod is disposed inside the insulating sleeve and is connected to the lower end of the vacuum interrupter. The insulating sleeve has mounting slots on both sides that can accommodate voltage transformers, and the included angle between the center of the two mounting slots and the center of the insulating sleeve is less than 90 degrees.

[0014] The lower conductive rod has an electrode column integrally formed with the insulating sleeve on its outer side, and a current transformer is installed inside the electrode column.

[0015] The beneficial effects of this utility model are: by simplifying the internal structure of the outdoor circuit breaker and utilizing the sharing of various parts, the number of parts is reduced, and the internal structure is made more compact, thereby reducing the weight of the entire outdoor circuit breaker. Attached Figure Description Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] Figure 2 This is a schematic diagram of the interior of the present invention. Figure 1 .

[0017] Figure 3 This is a schematic diagram of the interior of the present invention. Figure 2 .

[0018] Figure 4 This is a schematic diagram of the internal structure of the cavity of this utility model. Figure 1 .

[0019] Figure 5 This is a schematic diagram of the internal structure of the cavity of this utility model. Figure 2 .

[0020] Figure 6 for Figure 5 Enlarged diagram of point A in the middle.

[0021] Figure 7 This is a schematic diagram of the transmission assembly.

[0022] Figure 8 A cross-sectional view of the unlocking position of the permanent magnet mechanism.

[0023] Figure 9 This is a cross-sectional view of the locked position of the permanent magnet mechanism.

[0024] Figure 10 This is a structural diagram showing the unlocking position of the locking component.

[0025] Figure 11 This is a structural diagram showing the locking position of the locking component.

[0026] Figure 12 This is a schematic cross-sectional view of a vacuum electrode.

[0027] Figure 13 This is a schematic diagram of the transverse cross-section of a vacuum electrode. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0030] like Figure 1 As shown, this utility model discloses an outdoor circuit breaker, which includes a housing and a plurality of vacuum terminals disposed on the housing. In this embodiment, there are three vacuum terminals, which are arranged at equal intervals above the housing and fixedly connected to the housing. A sealing ring is provided at the connection point between the terminals and the housing. Figure 1 In the diagram, X represents the length of the box, Y represents the width of the box, and Z represents the height of the box.

[0031] The enclosure 100 has an internal chamber. The enclosure is composed of a U-shaped bent plate and side plates at both ends of the U-shaped bent plate. The U-shaped bent plate and the side plates are welded and fixed together. The U-shaped bent plate and the side plates at both ends form a downward-opening chamber. At the same time, a detachable bottom plate is provided at the opening for internal maintenance and installation.

[0032] like Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the cavity is provided with: Two intermediate support plates 120 are symmetrically arranged with respect to the center line in the length direction of the box body 100. Their upper ends are fixedly connected to the U-shaped bent plate. A gap is formed between the two intermediate support plates for the driving square shaft 310 to pass through. One end of the intermediate support plate 120 is bent outward to form a connecting plate for fixing the permanent magnet mechanism 800. The intermediate support plates are respectively provided with a first guiding groove and a second guiding groove which are perpendicular to each other, and the first guiding groove is arranged along the length direction; Two side plate support plates 110 are arranged along the length direction of the box body together with the intermediate support plates 120, and the two are respectively located at the front and rear ends of the intermediate support plate 120. Their upper ends are fixedly connected to the U-shaped bent plate, and the cross section of the side plate support plate 11 is U-shaped, and both sides are provided with a third guiding groove and a fourth guiding groove which are vertically arranged.

[0033] The intermediate support plate is formed by bending one end of a plate into an L-shaped structure. When the two intermediate support plates are fixed on the U-shaped bent plate, they are approximately in the shape of "儿" with a gap formed in the middle for the driving square shaft to pass through.

[0034] The first guiding groove and the third guiding groove are used to limit the pin shaft of the driving square shaft and the crank arm, that is, the pin shaft can slide along the guiding groove. The second guiding groove and the fourth guiding groove are used to limit the pin shaft connecting the insulating pull rod and the crank arm. With the design of their perpendicularity, the movement of the driving square shaft in the length direction can be converted into the movement of the insulating pull rod in the height direction.

[0035] A number of hanging ears are provided at the upper end of the U-shaped bent plate. The hanging ears are directly welded and fixed to the upper surface of the U-shaped bent plate for hoisting the assembled outdoor circuit breaker.

[0036] A first mounting plate 130 for cooperating with the connecting plate is provided at the top of the chamber. That is, one end of the permanent magnet mechanism is fixedly connected to the connecting plate, and the upper side of the other end is connected to the first mounting plate, and the two realize the fixation of the permanent magnet mechanism. At the same time, the two intermediate support plates can also play a guiding role for the pull rod of the permanent magnet mechanism. That is, a fifth guiding groove is also provided on the intermediate support plate, and the fifth guiding groove is arranged in parallel with the first guiding groove. The pull rod of the permanent magnet mechanism forms a sliding fit with the fifth guiding groove through a pin shaft.

[0037] At the same time, the height difference between the fifth guiding groove and the first guiding groove is the length of the second guiding groove, and the end of the fifth guiding groove is close to the starting end of the first guiding groove.

[0038] A second mounting plate for installing a buffer pad is provided on the side plate for fixing the buffer pad to prevent the driving square shaft from directly hitting the side plate during opening, resulting in deformation of the side plate.

[0039] The second mounting plate has connecting pieces on both sides for fixing the opening spring assembly. These pieces are U-shaped and are used to connect with the hanging plate of the opening spring assembly to fix the opening spring assembly.

[0040] like Figure 12 and Figure 13 As shown, several vacuum poles 200 are spaced apart above the housing 100 along the length of the housing. In this embodiment, a pre-set shielding cover is used to fix the flexible connection assembly in advance, and then an insulating sleeve is formed by integral casting. The integral casting is carried out by APG process (automatic pressure gel molding process of epoxy resin) to integrally cast the vacuum interrupter, upper conductive rod, lower conductive rod, flexible connection assembly, and shielding cover to form an insulating resin cavity, combining the internal components together, thereby reducing the diameter of the entire insulating sleeve and reducing the weight of the vacuum pole.

[0041] The vacuum pole includes: an insulating sleeve and a vacuum interrupter chamber disposed therein, an upper conductive rod, a lower conductive rod, a flexible connection assembly, and a vacuum pull rod. The insulating sleeve contains the built-in vacuum interrupter chamber. The upper conductive rod 220 is disposed on the upper side of the insulating sleeve 210 and connected to one end of the vacuum interrupter 211; the upper conductive rod is disposed on the upper side of the insulating sleeve and connected to one end of the vacuum interrupter, while the upper conductive rod part is exposed out of the insulating sleeve and is provided with a terminal block. The upper conductive rod and the insulating sleeve are coaxially arranged and have a central axis L1.

[0042] The lower conductive rod 250 is arranged perpendicular to the insulating sleeve 210; the lower conductive rod, arranged perpendicular to the insulating sleeve, has a central axis L2.

[0043] The shield 230 is disposed inside the insulating sleeve 210, and its upper end is provided with a through hole communicating with the vacuum interrupter. One side of the shield 230 is provided with a through hole through which the lower conductive rod 250 passes; the other side of the shield 230 is provided with a through hole through which the lower conductive rod 500 passes. The presence of the shield 230 can isolate the epoxy resin during casting, preventing it from entering the shield 230. At the same time, it can realize the integral casting of the flexible connection component with the vacuum interrupter and the upper and lower conductive rods. By pre-installing the flexible connection component inside the shield 230, the large space required for installing the flexible connection component inside the insulating sleeve can be avoided, which would lead to an increase in the volume of the vacuum pole.

[0044] The flexible connection assembly 240 is disposed inside the shield 230 and is connected to the other end of the vacuum interrupter and the lower conductive rod 250 respectively. The flexible connection assembly includes a connector connecting the lower conductive rod and the vacuum interrupter 300 and a connector assembly for connecting the voltage transformer. By pre-connecting, the connector assembly is fixed in the insulating sleeve by casting, which can ensure the stability of the installation position of each connector assembly.

[0045] An insulating pull rod 280 is disposed inside the insulating sleeve 210 and is connected to the lower end of the vacuum interrupter, which is used to drive the vacuum interrupter to operate.

[0046] The insulating sleeve 210 has mounting slots on both sides to accommodate the voltage transformer 290, and the angle between the center of the two mounting slots and the center of the insulating sleeve is less than 90 degrees. That is, the center lines from the center of the two mounting slots to the center L1 of the insulating sleeve are L3 and L4, respectively, and the angle α between them is less than 90 degrees.

[0047] By placing two mounting slots on the left and right sides of the non-lower conductive post and bringing them as close as possible, the diameter of the entire vacuum pole is kept as constant as possible, thereby reducing the overall size of the vacuum pole. This allows for easy installation of the voltage transformer and provides good insulation.

[0048] Meanwhile, the lower conductive rod has an electrode column integrally formed with the insulating sleeve on its outer side. The electrode column contains a current transformer 260. By pre-embedding the current transformer and forming it integrally, it occupies less space and can reduce the volume of the entire vacuum electrode column.

[0049] The insulating sleeve protrudes outward from the side near the pole body to form a protrusion extending from the bottom of the insulating sleeve to the lower surface of the pole body. The protrusion has a channel for wiring and a reserved wiring channel 270 to facilitate the connection of the current transformer of the vacuum pole to the outside.

[0050] The voltage transformer is fixed in the mounting groove by casting, which makes the voltage transformer completely set inside the insulating sleeve.

[0051] The voltage transformer is fixed in the mounting slot by plugging and unplugging. One end of the voltage transformer is provided with an electrical connector that can be plugged and unplugged into the flexible connection component. The voltage transformer is inserted into the mounting slot along the opening direction through the reserved mounting slot. When it is inserted into the slot, it contacts the connector through the electrical connector to achieve conduction between the two.

[0052] You can choose between the two methods depending on your needs.

[0053] The insulating sleeve surface is provided with several umbrella skirts to increase the creepage distance.

[0054] The permanent magnet mechanism 800 is installed inside the housing 100. It is fixedly connected to the housing by a frame. The frame 810 includes a front cover and a rear cover 811 and a guide rod connecting the front and rear covers. The permanent magnet mechanism is fixed between the front and rear covers and is fixedly connected to the front cover. At the same time, a mounting panel is provided on one side of the frame.

[0055] The permanent magnet mechanism 800 has a moving iron core 820 and a permanent magnet assembly 830 arranged opposite to each other. The permanent magnet assembly 830 is provided with a semi-circular groove 831 near the moving iron core 820. The permanent magnet assembly includes a front housing and a permanent magnet disposed in the front housing. The front end of the moving iron core is inserted into the through hole in the center of the permanent magnet. The moving iron core is fixedly connected to the pull rod and can drive the pull rod to move relative to it. At the same time, a rear housing is provided on the rear side of the permanent magnet. The rear housing and the front housing form a relatively complete housing. The rear housing can move closer to or away from the front housing under the action of the moving iron core. Preferably, a semi-circular groove is provided on one side of the front housing to facilitate the insertion of the half shaft.

[0056] The permanent magnet mechanism 800 is also provided with a self-locking mechanism 500.

[0057] The self-locking mechanism 500 includes: The half-shaft 510, and a portion thereof rests within the semi-circular groove 831. The operating handle is rotatably mounted on the outside of the housing and is fixedly connected to the half shaft 510. The operating handle has two positions: locked and unlocked. It is mainly used by the user to directly operate the half shaft outside the outdoor circuit breaker housing to forcibly disconnect the permanent magnet mechanism and restrict the movement of the permanent magnet mechanism. The half-shaft 510 has a locked state where, when the operating handle is in the locked position, it rotates relative to the semi-circular groove 831 to form a misalignment that restricts the reset of the moving iron core, and an unlocked state where, when the operating handle is in the unlocked position, it rotates relative to the semi-circular groove to release the restriction on the moving iron core. Figure 8 and Figure 9 As shown.

[0058] The half-shaft is a circular shaft with a semi-circular boss at its front end, which allows the boss to be inserted into a semi-circular groove. The semi-circular boss and the semi-circular groove can be misaligned by relative rotation.

[0059] The self-locking mechanism 500 is also provided with a locking mechanism, such as... Figure 10 and Figure 11 As shown.

[0060] The locking mechanism includes a fixing member 520 fixedly connected to the half shaft 510, and a locking member 530 hinged to the fixing member 520 at one end. The other end of the locking member 530 is provided with a guide groove 531, and the other end of the locking member is connected to the middle support plate of the housing through a third pin 540. The third pin is slidably disposed in the guide groove, and a spring is also provided between the locking member and the third pin.

[0061] When the operating handle is rotated, a certain amount of force is required to compress the locking spring, which in turn causes the half-shaft to rotate. After the rotation is completed, the locking spring returns to its original position, pressing against the fixing part and maintaining its state. This means that a relatively large force is required to operate the operating handle, preventing accidental operation of the operating handle.

[0062] The locking component has protrusions on both sides of its front end. One end of the spring is limited by the protrusion 532. The protrusion design restricts one end of the spring, while the other end is limited by a pin. The pin can slide relative to the guide groove. Therefore, when a large external force is applied, the pin can move relative to the compressed spring, thus driving the operating handle to rotate. However, under a smaller force, due to the presence of the spring, when the external force is less than the spring's elastic force, the locking component will not be driven to rotate because it presses against the fixing component. The locking component presses against the fixing component in both states. The fixing component can be directly welded to the half-shaft or directly fixed to the half-shaft with bolts.

[0063] The frame is equipped with a limit switch 550, and a trigger 560 for triggering the limit switch is provided on one side of the fixing member. The trigger is preferably an extension of the hinge shaft between the locking member and the fixing member, which reduces costs, simplifies installation, and allows for multiple uses on a single shaft. Furthermore, when it rotates, it touches the limit switch, causing it to close and disconnecting the control of the corresponding control board, thus avoiding remote control.

[0064] The frame is provided with a limiting member, which is welded to the panel. The limiting member 570 has a notch, and the fixing member is placed in the notch. Its upper and lower ends limit the fixing member, thereby limiting the maximum rotation angle of the half shaft.

[0065] The frame includes a rear end cover with a central hole. The pull rod portion of the permanent magnet mechanism is placed inside the central hole, which is used to limit the concentricity of the pull rod and ensure that the moving iron core does not shift position when it moves.

[0066] One end of the half-shaft is provided with an indicator, and the outer side of the outdoor circuit breaker housing is provided with an indicator mark corresponding to the indicator. There are two indicator marks, which are arranged side by side. The indicator is a pointer or indicator arrow that rotates synchronously with the half-shaft. As the half-shaft rotates, it rotates between the two indicator marks, thereby realizing position indication and making it easy for users to understand the current status or whether the operation is in place.

[0067] The operating handle is equipped with a direction indicator mark to indicate the operating direction of the operating handle.

[0068] like Figure 7As shown, the transmission assembly 300 is disposed inside the housing 100, and includes a drive square shaft 310 and at least four crank arms 320, wherein three of the crank arms 320 are linked with the insulating pull rod 280 of the vacuum pole post 200, and the other crank arms 320 are linked with the permanent magnet mechanism 800. Two spring assemblies 400 are symmetrically arranged on both sides of the drive shaft 310, and one end of each spring is connected to the drive shaft via a first pin 630. One end of the first pin 630 extends outward to form a first linkage shaft. The trip spring assembly 400 includes a first mounting plate 410 connected to the outdoor circuit breaker housing and a second mounting plate 430 connected to the drive square shaft. A trip spring 420 is provided between the first mounting plate 410 and the second mounting plate 430. The second mounting plate 430 is a double-hole mounting plate. By adjusting the position of the connecting holes of the double-hole mounting plate, different tripping forces of the trip spring can be achieved to meet the tripping requirements of different models of outdoor circuit breakers.

[0069] The indicator component 600 includes an indicator mark disposed on the surface of the housing and a rotatable pointer component 610. The pointer component includes a pointer, a rotating shaft that rotates synchronously with the pointer, and a first shift fork 620 disposed at the end of the rotating shaft. The first shift fork 620 is linked to a first linkage shaft.

[0070] When the drive shaft moves along the length direction, it can drive the first shift fork to rotate relative to each other via the first linkage shaft, thereby causing the pointer fixedly connected to the first shift fork to rotate relative to each other, thus realizing status indication.

[0071] The crank arm 320 is connected to the drive shaft 310 via a second pin 710, and any one of the second pins 710 extends outward to form a second linkage shaft. An auxiliary switch 700 is provided on the intermediate support plate 120, and the actuating end of the auxiliary switch 700 is provided with a second shift fork 720. The second shift fork 720 is linked with the second linkage shaft.

[0072] Similarly, by extending the second pin to form a second linkage shaft, the auxiliary switch can be directly triggered through the second shift fork to achieve signal output. By directly using the pin as a rotating shaft, the number of internal parts can be reduced, making the internal structure more compact.

[0073] The embodiments should not be regarded as limitations on the present invention, but any improvements made based on the spirit of the present invention should be within the protection scope of the present invention.

Claims

1. An outdoor circuit breaker, characterized in that: It includes: The housing (100) has an internal chamber; Several vacuum poles (200) are spaced apart above the box (100) along the length of the box; A permanent magnet mechanism (800) is disposed within the housing (100); The transmission assembly (300) is disposed inside the housing (100) and includes a drive square shaft (310) and at least four crank arms (320), wherein three of the crank arms (320) are linked to the insulating pull rod (280) of the vacuum pole (200), and the other crank arms (320) are linked to the permanent magnet mechanism (800). Two spring assemblies (400) are symmetrically arranged on both sides of the drive shaft (310), and one end of each spring is connected to the drive shaft via a first pin (630). One end of the first pin (630) extends outward to form a first linkage shaft. The indicator assembly (600) includes an indicator mark disposed on the surface of the housing and a rotatable pointer assembly (610). The pointer assembly includes a pointer, a rotating shaft that rotates synchronously with the pointer, and a first shift fork (620) disposed at the end of the rotating shaft. The first shift fork (620) is linked to the first linkage shaft.

2. An outdoor circuit breaker according to claim 1, characterized in that: The enclosure includes a U-shaped curved plate and side plates disposed at both ends of the U-shaped curved plate. The U-shaped curved plate and the side plates at both ends form a downward-opening chamber. The chamber contains: Two intermediate support plates (120) are symmetrically arranged relative to the center line of the box body (100) in the length direction. Their upper ends are fixedly connected to U-shaped bent plates. A gap is formed between the two intermediate support plates for the drive square shaft (310) to pass through. One end of the intermediate support plate (120) is bent outward to form a connecting plate for fixing the permanent magnet mechanism (800). The intermediate support plates are respectively provided with a first guide groove and a second guide groove arranged perpendicularly to each other, wherein the first guide groove is arranged along the length direction. Two side support plates (110) are set along the length of the box together with the middle support plate (120), and the two are located at the front and rear ends of the middle support plate (120) respectively. Their upper ends are fixedly connected to the U-shaped bending plate. The cross-section of the side support plate (110) is U-shaped, and both sides are provided with a vertically arranged third guide groove and a fourth guide groove.

3. An outdoor circuit breaker according to claim 2, characterized in that: The top of the chamber is provided with a first mounting plate (130) that works in conjunction with the connecting plate.

4. An outdoor circuit breaker according to claim 2, characterized in that: The crank arm (320) is connected to the drive shaft (310) through a second pin (710), and any one of the second pins (710) extends outward to form a second linkage shaft. An auxiliary switch (700) is provided on the intermediate support plate (120), and the actuating end of the auxiliary switch (700) is provided with a second shift fork (720). The second shift fork (720) is linked with the second linkage shaft.

5. An outdoor circuit breaker according to claim 1, characterized in that: The permanent magnet mechanism (800) is also provided with a self-locking mechanism (500).

6. An outdoor circuit breaker according to claim 5, characterized in that: The permanent magnet mechanism (800) has a moving iron core (820) and a permanent magnet assembly (830) arranged opposite to each other, and the permanent magnet assembly (830) has a semi-circular groove (831) near the moving iron core (820). The self-locking mechanism (500) includes: The half-shaft (510) is partially positioned within the semi-circular groove (831). The operating handle is rotatably mounted on the outside of the housing and is fixedly connected to the half-shaft (510). The operating handle has two positions: locked and unlocked. The half-shaft (510) has a locked state in which it rotates relative to the semi-circular groove (831) to form a misalignment that restricts the reset of the moving iron core when the operating handle is in the locked position, and an unlocked state in which it rotates relative to the semi-circular groove to release the restriction on the moving iron core when the operating handle is in the unlocked position.

7. An outdoor circuit breaker according to claim 6, characterized in that: The self-locking mechanism (500) is also provided with a locking mechanism.

8. An outdoor circuit breaker according to claim 7, characterized in that: The locking mechanism includes a fixing member (520) fixedly connected to the half shaft (510), and a locking member (530) with one end hinged to the fixing member (520). The other end of the locking member (530) is provided with a guide groove (531), and the other end of the locking member is connected to the middle support plate of the housing through a third pin (540). The third pin is slidably disposed in the guide groove, and a spring is also provided between the locking member and the third pin.

9. An outdoor circuit breaker according to claim 1, characterized in that: The vacuum pole (200) includes: Insulating sleeve (210) with built-in vacuum interrupter (211); The upper conductive rod (220) is disposed on the upper side of the insulating sleeve (210) and connected to one end of the vacuum interrupter (211); The lower conductive rod (250) is arranged perpendicular to the insulating sleeve (210); The shield (230) is disposed inside the insulating sleeve (210), and its upper end is provided with a through hole communicating with the vacuum interrupter, and its side is provided with a through hole through which the lower conductive rod (250) can pass. A flexible connection assembly (240) is disposed inside the shield (230) and is connected to the other end of the vacuum interrupter and the lower conductive rod (250) respectively. An insulating pull rod (280) is disposed inside the insulating sleeve (210) and is connected to the lower end of the vacuum interrupter. The insulating sleeve (210) has mounting slots on both sides that can accommodate voltage transformers (290), and the included angle between the center of the two mounting slots and the center of the insulating sleeve is less than 90 degrees.

10. An outdoor circuit breaker according to claim 9, characterized in that: The lower conductive rod has an electrode column integrally formed with the insulating sleeve on its outer side, and a current transformer (260) is provided inside the electrode column.

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