Mining high-voltage explosion-proof circuit breaker

Abstract

The invention belongs to the technical field of power equipment, and particularly relates to a mining high-voltage explosion-proof circuit breaker which comprises a shell, a mounting frame, an arc extinguishing assembly and a permanent magnet assembly. The rotating rod is rotationally connected to the mounting frame through a bearing; the hand separating mechanism is mounted at the rear end of the shell; the interlocking mechanism comprises interlocking parts arranged at the lower ends of the two sides of the shell, the interlocking parts are used for synchronously opening when the box door is opened, and the interlocking parts are further provided with positioning parts; and the auxiliary mechanism comprises linkage parts arranged at the upper ends of the two sides of the shell, and the two sides of the shell are further provided with a limiting part and an oil spraying part. Through multi-stage cooperation of permanent magnet driving, mechanical interlocking, emergency manual opening and an intelligent lubricating system, safe opening and closing, door opening forced outage, overhaul false closing prevention and long-term maintenance of key components of the mining high-voltage circuit breaker are achieved, and operation safety and equipment reliability in the explosion-proof environment are remarkably improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of electrical equipment, and particularly relates to a mine-used high-voltage explosion-proof circuit breaker. Background Art

[0002] A circuit breaker is an electrical device used to control and protect circuits, and is widely used in power systems, industrial and mining enterprises, buildings, transportation and other fields; its main function is to quickly cut off the circuit when short circuit, overload and grounding faults occur in the circuit to protect the safety of equipment and personnel. A mine-used high-voltage explosion-proof circuit breaker is a core device in the coal mine underground power supply system, and needs to meet strict requirements such as explosion-proof, corrosion-resistant, and impact-resistant. Since the mine tunnel is relatively narrow, in order to reduce the volume of the circuit breaker, the components of the circuit breaker are usually integrated in one or more spliced casings.

[0003] A circuit breaker for mine explosion-proof equipment with the application number: CN202310773047.0, which includes an insulating frame and a fixed frame. A first wiring structure is provided on the side of the insulating frame, and a permanent magnet cylinder and a transmission component for controlling the opening and closing of the circuit breaker are arranged inside the fixed frame; a mutual inductance component is arranged on the side of the insulating frame away from the fixed frame, and the mutual inductance component includes a mutual inductance housing, and a zero-sequence sensor and several current sensors are installed inside the mutual inductance housing; a second wiring structure is arranged on the mutual inductance housing; a control component is arranged on the side of the fixed frame below the insulating frame; the insulating frame, the mutual inductance housing, and the fixed frame are arranged in a surrounding manner; through the combined setting of the control component and the mutual inductance component, and the surrounding arrangement of the insulating frame, the mutual inductance housing, and the fixed frame, better space is utilized, so that the circuit breaker can be suitable for the environment in coal mines.

[0004] The above circuit breaker significantly reduces the overall volume by integrating various components into multiple casings, making the equipment more compact. However, this design brings some inconveniences in actual applications, especially during maintenance and repair work. Since the components are scattered in multiple casings, technicians have to open multiple casings to access the parts that need to be repaired or maintained, which not only increases the complexity of the operation but also prolongs the maintenance time. In addition, during the repair process, it is difficult to ensure that the circuit breaker is always in the open state. If the operation is improper, the circuit breaker may suddenly close, posing a certain risk. At the same time, in order to perform maintenance or repair, the opening of the casing of the explosion-proof switch and the power-off operation must be carried out in steps. The complexity of this operation sequence increases the possibility of misoperation, which may lead to the dangerous situation of opening the cover while the power is on, which undoubtedly poses a potential threat to the safety of operators. Summary of the Invention

[0005] In view of this, the object of the present invention is to provide a mine-used high-voltage explosion-proof circuit breaker. Through the multi-level cooperation of permanent magnet drive, mechanical interlock, emergency manual tripping and intelligent lubrication system, the safe opening and closing of the mine-used high-voltage circuit breaker, forced power-off when opening the door, prevention of misclosing during maintenance and long-term maintenance of key components are realized, significantly improving the operation safety and equipment reliability in the explosion-proof environment.

[0006] Based on the above object, the present invention provides a mine-used high-voltage explosion-proof circuit breaker, including a housing. Two shaft rods are rotatably connected to the front end of the housing through bearings. An installation frame is slidably connected to the bottom surface of the inner cavity of the housing. Three arc extinguishing components are installed at the upper end of the installation frame; A permanent magnet component, which is installed at the lower end of the installation frame; A rotating rod, which is rotatably connected to the installation frame through a bearing. The permanent magnet component is used to drive the rotating rod to rotate to control the opening and closing of the circuit breaker; A tripping mechanism, which is installed at the rear end of the housing and is used for tripping operation when the permanent magnet component fails; An interlock mechanism, which includes interlock parts arranged at the lower ends of both sides of the housing for synchronously tripping when opening the box door, and a positioning part is also arranged on the interlock parts; An auxiliary mechanism, which includes linkage parts arranged at the upper ends of both sides of the housing, and a limiting part and an oil injection part are also arranged on both sides of the housing.

[0007] Furthermore, a force-receiving plate and a fixing plate are fixedly connected to the rotating rod. A reset spring is fixedly connected between the fixing plate and the installation frame. Three groups of connecting rods are fixedly connected to the rotating rod on the side far from the force-receiving plate. An anti-disconnection rod is fixedly connected to the force-receiving plate. J-shaped grooves are opened on both sides of the housing, and the end of the anti-disconnection rod is slidably connected to the J-shaped groove.

[0008] Furthermore, the tripping mechanism includes a tripping rod, which is rotatably connected to the housing through a bearing. Handles are fixedly connected to both ends of the tripping rod, and a dial is fixedly connected to the middle end of the tripping rod.

[0009] Furthermore, the interlock part includes two groups of guide rods, which are respectively fixedly connected to both sides of the housing. A moving block is slidably connected to each group of guide rods. A push rod is fixedly connected to the upper end of the moving block. A rack is fixedly connected to the lower end of the guide rod. Installation grooves are opened at the two lower corners of the housing, and a first round rod is rotatably connected to the installation groove through a bearing. A first transmission gear and a second transmission gear are fixedly installed on the first round rod.

[0010] Further, the positioning portion includes a clamping block which is slidably inserted into the moving block. A spring is fixedly connected between the clamping block and the moving block. A positioning plate is fixedly connected to the side surface of the housing.

[0011] Further, one end of the clamping block is a square block, and a pull ring is connected to its end. The other end of the clamping block is a trapezoidal block. Rectangular grooves are arranged in an array on the positioning plate.

[0012] Further, the linkage portion includes four second round rods which are rotatably connected to the brackets on the side surface of the housing through bearings. Third transmission gears are fixedly installed on the second round rods. Installation grooves are opened at two corners of the upper end of the housing, and two third round rods are rotatably connected in the installation grooves through bearings. Two fourth transmission gears are fixedly installed on the third round rods.

[0013] Further, the limiting portion includes four sliding grooves which are opened on the housing. Sliding blocks are slidably connected in the sliding grooves. A locking rod is fixedly connected to one side of the sliding block. A first compression spring is fixedly connected to the other side of the sliding block, and the other end of the first compression spring is fixedly connected to the inner wall of the sliding groove. A winding roller is fixedly installed at the lower end of the second round rod. A traction rope is fixedly connected to the winding roller, and the other end of the traction rope is fixedly connected to the sliding block.

[0014] Further, the oil spraying portion includes four oil storage grooves which are opened on the housing and are located above the sliding grooves. An annular oil storage groove is opened at the end of the sliding groove, and micropores are arranged in an array in the annular oil storage groove for the oil liquid to flow out. An oil delivery groove is arranged between the oil storage groove and the annular oil storage groove. An oil storage box is fixedly connected to the side surface of the housing. An oil delivery pipe is arranged between the oil storage box and the oil storage groove. A piston block is slidably connected in the oil storage groove. A piston rod is fixedly connected to one side of the piston block. A second compression spring is fixedly connected to the piston rod, and the other end of the second compression spring is fixedly connected to the housing. A cam is rotatably connected to the second round rod through a bearing.

[0015] Further, the oil spraying portion further includes a hollow cylinder which is fixedly connected to the top surface of the cam. Pawls are annularly distributed and hinged to the inner ring of the hollow cylinder, and a metal spring is fixedly connected between the pawl and the hollow cylinder. A ratchet wheel is fixedly installed on the second round rod.

[0016] Advantages of the present invention: As can be seen from the above, the mine-used high-voltage explosion-proof circuit breaker provided by the present invention completely solves the safety hazard of the separation of power-off and cover-opening operations of traditional equipment through the collaborative design of the interlock mechanism and the separating mechanism. When the operator opens the cabinet door, the shaft drives the first driving gear to drive the interlock part, and the moving block is pushed backward by the rack, triggering the push rod to press the handle of the separating rod, and forcing the rotating rod to rotate to achieve the opening of the circuit breaker. This process realizes the synchronization of cabinet door opening and power-off through mechanical linkage, ensuring that the system is in a de-energized state when the operator contacts the internal components. At the same time, the positioning part automatically locks the position of the moving block through the trapezoidal engagement structure of the clamping block and the positioning plate to prevent the cabinet door from accidentally closing; A dual-opening protection system is constituted by the permanent magnet component and the separating mechanism. Under normal working conditions, the permanent magnet component precisely controls the lifting of the moving part through the change of the electric control magnetic field, and drives the rotating rod to complete the fast opening and closing operations. When the permanent magnet drive fails, the separating mechanism directly acts on the stress plate by manually rotating the dial plate, and realizes mechanical forced opening by using the energy storage characteristic of the return spring. The specially designed J-shaped groove and anti-disengagement rod linkage mechanism automatically lock the rotation freedom of the rotating rod when the mounting frame moves forward for maintenance, forming a physical isolation barrier to prevent accidental closing during the maintenance process, further improving the safety of the equipment. This design significantly reduces the probability of accidents and provides strong protection for the life safety of operators; The auxiliary mechanism realizes the modular operation of equipment maintenance through the precise cooperation of the linkage part and the limiting part. When the cabinet door is opened to 90 degrees, the winding roller completely retracts the locking rod through the traction rope, releases the limit on the mounting frame, and enables the core modules such as the entire arc extinguishing component and the permanent magnet component to move forward as a whole along the sliding seat for maintenance, avoiding the operation risk of personnel entering deep into the equipment. The oil injection part adopts an automatic lubrication system driven by a ratchet and pawl, and only triggers the cam to squeeze the piston block when the locking rod is inserted into the lock hole, and precisely sprays the lubricating oil to the sliding contact surface. This reduces the movement resistance of the locking rod and prolongs the lubrication period. The overall maintenance time is greatly shortened compared with the multi-shell equipment in the background technology, and the operation and maintenance efficiency is greatly improved. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only those of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

[0018] Figure 1 is the overall structural schematic diagram of the present invention; Figure 2 is the front cross-sectional view of the present invention; Figure 3 is the rear cross-sectional view of the present invention; Figure 4 is a schematic diagram of the mounting bracket of the present invention and the structure thereon; Figure 5 is the present invention Figure 4 rear view; Figure 6 is a partial cross-sectional view of the upper left corner of the outer shell of the present invention; Figure 7 is a partial cross-sectional view of the lower left corner of the outer shell of the present invention; Figure 8 is an exploded view of a partial structure of the interlocking mechanism of the present invention; Figure 9 is a partial cross-sectional view of the outer shell 1 of the present invention; Figure 10 is the present invention Figure 9 front view; Figure 11 is a schematic connection diagram of the arc extinguishing component and the permanent magnet component of the present invention; Figure 12 is a schematic diagram of the structure of the arc extinguishing component of the present invention.

[0019] The markings in the figure are: 1. Outer shell; 2. Shaft rod; 21. First driving gear; 22. Second driving gear; 3. Mounting bracket; 31. Slide seat; 32. Lock hole; 4. Arc extinguishing component; 41. Insulating rod; 5. Permanent magnet component; 51. Magnetic cylinder; 52. Iron core; 53. Movable part; 54. Lifting rod; 55. Permanent magnet; 6. Rotating rod; 61. Force-bearing plate; 62. Fixed plate; 63. Return spring; 64. Link; 65. Anti-disengagement rod; 66. J-shaped groove; 7. Breaking-up mechanism; 71. Breaking-up rod; 72. Handle; 73. Pushing plate; 8. Interlocking mechanism; 81. Interlocking part; 811. Guide rod; 812. Moving block; 813. Push rod; 814. Rack; 815. First round rod; 816. First transmission gear; 817. Second transmission gear; 82. Positioning part; 821. Positioning plate; 822. Block; 823. Spring; 9. Auxiliary mechanism; 91. Linkage part; 911. Third round rod; 912. Fourth transmission gear; 913. Second round rod; 914. Third transmission gear; 92. Limiting part; 921. Sliding groove; 922. Sliding block; 923. Locking rod; 924. First compression spring; 925. Winding roller; 926. Traction rope; 93. Oil injection part; 931. Oil storage tank; 932. Annular oil storage groove; 933. Oil delivery groove; 934. Oil storage box; 935. Oil delivery pipe; 936. Piston block; 937. Piston rod; 938. Second compression spring; 939. Cam; 9310. Hollow cylinder; 9311. Ratchet; 9312. Pawl. Detailed implementation manners

[0020] To make the objectives, technical solutions and advantages of the present invention more clear and understandable, the present invention will be further described in detail below with reference to specific embodiments.

[0021] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should have the ordinary meanings understood by those with ordinary skills in the field to which the present invention pertains. The "first", "second" and similar terms used in the present invention do not denote any order, quantity or importance, but are only used to distinguish different components. The terms such as "comprising" or "including" mean that the elements or objects appearing before this word cover the elements or objects listed after this word and their equivalents, without excluding other elements or objects. The terms such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The terms such as "upper", "lower", "left", "right" are only used to represent relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0022] Please refer to the attached Figures 1 to 5 As shown, this embodiment provides a mine-used high-voltage explosion-proof circuit breaker, which includes a housing 1, on which a controller is installed. At the front end of the housing 1, two shaft rods 2 are rotatably connected through bearings, and box doors are fixedly connected to the shaft rods 2. At the upper and lower ends of the shaft rods 2, a second driving gear 22 and a first driving gear 21 are respectively installed. At the bottom surface of the inner cavity of the housing 1, a mounting frame 3 is slidably connected. At the upper end of the mounting frame 3, two sliding seats 31 are fixedly connected, and locking holes 32 are formed in the sliding seats 31. At the upper end of the mounting frame 3, three arc extinguishing components 4 are installed; A permanent magnet assembly 5, which is installed at the lower end of the mounting frame 3; A rotating rod 6, which is rotatably connected to the mounting frame 3 through a bearing. The permanent magnet assembly 5 is used to drive the rotating rod 6 to rotate to control the opening and closing of the circuit breaker; A tripping mechanism 7, which is installed at the rear end of the housing 1 and is used to perform a tripping operation when the permanent magnet assembly 5 fails; An interlocking mechanism 8, which includes interlocking parts 81 arranged at the lower ends on both sides of the housing 1 and is used to simultaneously trip when the box door is opened. A positioning part 82 is also arranged on the interlocking parts 81; An auxiliary mechanism 9, which includes linkage parts 91 arranged at the upper ends on both sides of the housing 1. Limit parts 92 and oil spraying parts 93 are also arranged on both sides of the housing 1.

[0023] An arc extinguishing component 4 is provided with a vacuum tube. The moving contact and the static contact are both arranged in the vacuum tube. The static contact is electrically connected to the second wiring board, and the moving contact is electrically connected to the first wiring board. The lower end of the first wiring board is connected with an insulating rod 41, and a contact spring is arranged on the insulating rod 41. When the moving contact and the static contact are disconnected, an arc is generated. The vacuum tube isolates and breaks the circuit through the dielectric in the vacuum state, ensuring the normal operation of the circuit breaker. The vacuum tube is usually composed of multiple materials such as metal, ceramic, and insulating materials, and can withstand extreme working conditions such as high voltage, high current, and high temperature, reducing the impact of the arc generated during the opening of the circuit breaker on the inside of the circuit breaker.

[0024] Two groups of wiring rods are arranged at the upper end of the housing 1, with three in each group. The three front wiring rods are respectively electrically connected to the first wiring boards on the three arc extinguishing components 4 using spring cables, and the three rear wiring rods are respectively electrically connected to the second wiring boards on the three arc extinguishing components 4 using spring cables.

[0025] Secondly, please refer to again Figures 3 to 5 , a force-bearing plate 61 and a fixing plate 62 are fixedly connected to the rotating rod 6. A reset spring 63 is fixedly connected between the fixing plate 62 and the mounting bracket 3. Three groups of connecting rods 64 are fixedly connected to the rotating rod 6 on the side far from the force-bearing plate 61. The connecting rods 64 are in a Y shape. An anti-disengagement rod 65 is fixedly connected to the force-bearing plate 61. J-shaped grooves 66 are opened on both sides of the housing 1, and the end of the anti-disengagement rod 65 is slidably connected to the J-shaped groove 66.

[0026] Thirdly, please refer to together Figure 3 and Figure 11 , the parting mechanism 7 includes a parting rod 71. The parting rod 71 is rotatably connected to the housing 1 through a bearing. Handles 72 are fixedly connected to both ends of the parting rod 71, and a dial plate 73 is fixedly connected to the middle end of the parting rod 71.

[0027] The permanent magnet component 5 is fixedly connected to the mounting bracket 3 through bolts. The permanent magnet component 5 can control the reverse rotation of the rotating rod 6, thereby controlling the opening and closing of the circuit breaker. The permanent magnet component 5 includes a magnetic cylinder 51. A permanent magnet 55, an iron core 52, and a movable part 53 are arranged in the magnetic cylinder 51, and a lifting rod 54 connected to the upper end of the movable part 53. The movable part 53 can move along its own length direction, thereby controlling the on-off of the moving contact and the static contact. Specifically: when the staff can control the magnetic field change of the permanent magnet 55 and the iron core 52 through an electrical signal, input the corresponding electrical signal to change the magnetic field direction inside the magnetic cylinder 51, so as to form a driving torque, drive the movable part 53 and the lifting rod 54 to move up or down. The movement of the movable part 53 drives the rotating rod 6 to act, thereby disconnecting or closing the moving contact and the static contact, and further controlling the opening and closing state of the circuit breaker.

[0028] When the lifting rod 54 moves upward, a force is applied to the force-receiving plate 61, prompting the rotating rod 6 to rotate. The rotation of the rotating rod 6 drives the end of the connecting rod 64 to move downward, thereby driving the insulating rod 41 to move downward, and further driving the moving contact to move downward. At this time, the moving contact disconnects from the static contact. In addition, when the circuit breaker is in the closed state (i.e., the moving contact is connected to the static contact), a stable magnetic field is formed on the permanent magnet 55 and the iron core 52 inside the magnetic cylinder 51 respectively. At this time, the bottom side of the force-receiving plate 61 abuts against the upper surface of the dial plate 73, and at the same time, the return spring 63 is in a compressed state (as Figure 11 shown).

[0029] When the staff needs to disconnect the circuit breaker in the closed state and at this time, the permanent magnet assembly 5 cannot be driven to drive the rotating rod 6 to act through an electrical signal, the staff can rotate the handle 72 to drive the separating rod 71 to rotate synchronously. The rotation of the separating rod 71 drives the dial plate 73 to rotate, so that one end of the dial plate 73 abuts against the force-receiving plate 61, and drives the force-receiving plate 61 to move upward to prompt the rotating rod 6 to rotate. The upward movement of the force-receiving plate 61 will drive the lifting rod 54 and the movable member 53 to move upward. As long as the movable member 53 moves upward, it will change the magnetic field direction inside the magnetic cylinder 51 when it is in the closed state, and further break the stable magnetic field inside the magnetic cylinder 51, so that it loses the torque effect of driving the movable member 53. At the same time, the return spring 63 in the compressed state resets, further driving the movable member 53 to move upward, so that the movable member 53 continues to move upward to drive the force-receiving plate 61 to move to prompt the rotating rod 6 to continue to rotate. After the rotating rod 6 rotates, it presses down the insulating rod 41, so that the moving contact moves downward, thereby disconnecting the circuit breaker.

[0030] A movable groove is formed on the force-receiving plate 61, and a cross bar is inserted into the movable groove. The cross bar is fixedly connected to the lifting rod 54. When the lifting rod 54 moves up and down, through the cooperation of the cross bar and the movable groove, the force-receiving plate 61 drives the rotating rod 6 to rotate.

[0031] It should be noted that: both the permanent magnet assembly 5 and the arc extinguishing assembly 4 adopt the technologies or products already disclosed on the current market, and their specific structures and working principles will not be elaborated here too much; and when selecting models, under the premise of suitable specifications and usage scenarios, models that meet the requirements of this application should be selected as much as possible. Specific model specifications are not limited here.

[0032] Secondly, please refer to Figure 2 、 Figure 7 and Figure 8, the interlocking part 81 includes two groups of guide rods 811. The two groups of guide rods 811 are respectively fixedly connected to both sides of the housing 1. A moving block 812 is slidably connected to each group of guide rods 811. A push rod 813 is fixedly connected to the upper end of the moving block 812. A rack 814 is fixedly connected to the lower end of the guide rod 811. Installation grooves are formed at the two lower corners of the housing 1, and a first round rod 815 is rotatably connected in the installation groove through a bearing. A first transmission gear 816 and a second transmission gear 817 are fixedly installed on the first round rod 815.

[0033] In this embodiment, when it is necessary to repair the components inside the equipment housing 1, the operator will open the door on the front of the housing 1. During the process of opening the door, the shaft rod 2 will rotate accordingly, and then drive the first driving gear 21 and the second driving gear 22. The first driving gear 21 and the second transmission gear 817 are connected by a toothed belt to achieve synchronous rotation. The rotation of the second transmission gear 817 will drive the first round rod 815 and the first transmission gear 816. The first transmission gear 816 meshes with the rack 814, causing the rack 814 to move backward, and then pushing the moving block 812 to move along the guide rod 811. The movement of the moving block 812 will drive the push rod 813 to move backward. The backward movement of the push rod 813 will contact the handle 72, causing the separating rod 71 to rotate, so that the moving contact moves downward, resulting in the disconnection of the circuit breaker. This design ensures the synchronous progress of door opening and power-off operation, effectively avoiding the risk of opening the cover while the power is on caused by misoperation, and significantly reducing the probability of accidents.

[0034] In addition, during the process of opening the door, the handle 72 continuously receives the contact pressure from the push rod 813, which makes the rotating rod 6 unable to reset. Therefore, in the state where the door is open, accidental closing will not occur.

[0035] Please refer to again Figure 7 and Figure 8 , the positioning part 82 includes a clamping block 822. The clamping block 822 is slidably inserted on the moving block 812. A spring 823 is fixedly connected between the clamping block 822 and the moving block 812. A positioning plate 821 is fixedly connected to the side of the housing 1. Among them, one end of the clamping block 822 is square and has a pull ring at its end, while the other end has a trapezoidal structure. A plurality of rectangular grooves are orderly arranged on the positioning plate 821.

[0036] In this embodiment, when the box door is opened and the moving block 812 moves backward, the interaction between the clamping block 822 and the positioning plate 821 can effectively prevent the box door from automatically closing. Specifically, during the backward movement of the clamping block 822, it will be blocked by the protruding part on the positioning plate 821, causing it to move towards the moving block 812 and compress the spring 823. When the clamping block 822 moves into the rectangular groove on the positioning plate 821, due to the loss of the blocking force, the clamping block 822 is reset under the restoring force of the spring 823 and is embedded in the rectangular groove. At this time, the rectangular groove plays a limiting role on the clamping block 822, preventing the moving block 812 from moving forward, thus avoiding the problem of the box door automatically closing and ensuring the stability of the opening and closing of the box door. If the user needs to close the box door, they can pull the pull ring at one end of the clamping block 822 to make the clamping block 822 move towards the moving block 812. At this time, the clamping block 822 disengages from the groove on the positioning plate 821, and the box door can be smoothly closed.

[0037] Please refer to again Figure 6 、 Figure 9 and Figure 10 , the linkage part 91 includes four second round rods 913. The second round rods 913 are rotatably connected to the brackets on the side of the outer shell 1 through bearings. A third transmission gear 914 is fixedly installed on the second round rod 913. Installation grooves are formed at both upper corners of the outer shell 1, and two third round rods 911 are rotatably connected to the installation grooves through bearings. Two fourth transmission gears 912 are fixedly installed on the third round rod 911.

[0038] Please refer to again Figure 9 and Figure 10 , the limiting part 92 includes four sliding grooves 921. The sliding grooves 921 are formed on the outer shell 1. A sliding block 922 is slidably connected in the sliding groove 921. A locking rod 923 is fixedly connected to one side of the sliding block 922. A first compression spring 924 is fixedly connected to the other side of the sliding block 922, and the other end of the first compression spring 924 is fixedly connected to the inner wall of the sliding groove 921. A winding roller 925 is fixedly installed at the lower end of the second round rod 913. A traction rope 926 is fixedly connected to the winding roller 925, and the other end of the traction rope 926 is fixedly connected to the sliding block 922.

[0039] In this embodiment, the second drive gear 22 is connected to the fourth transmission gear 912 at the upper end of the third round rod 911 through a toothed belt drive, so that the third round rod 911 rotates synchronously during the door opening process. The fourth transmission gear 912 at the lower end of the third round rod 911 is also connected to the third transmission gear 914 through a toothed belt drive, thereby promoting the synchronous rotation of the second round rod 913. The rotation of the second round rod 913 drives the winding roller 925 to rotate; the rotation of the winding roller 925 winds the traction rope 926, thereby pulling the sliding block 922 and the lock rod 923 to move towards the winding roller 925 side and compressing the first compression spring 924. When both side doors are opened to 90 degrees, the winding roller 925 completely moves the lock rod 923 out of the lock hole 32. At this time, the mounting bracket 3 loses its limiting function, facilitating the forward movement of the mounting bracket 3 to facilitate the inspection or maintenance of the components on the mounting bracket 3, and reducing the risk of the human body entering the interior of the housing 1 for inspection or maintenance. During the door closing process, the winding roller 925 unwinds, and under the action of the restoring force of the first compression spring 924, the sliding block 922 and the lock rod 923 are reset.

[0040] It should be noted that before closing the door of the box, it is necessary to ensure that the mounting bracket 3 has been moved backward to the reset position to ensure that the lock rod 923 can be smoothly inserted into the lock hole 32 when closing the door.

[0041] In addition, after the door of the box is opened, the circuit breaker will automatically trip. During the tripping process of the circuit breaker, the rotation of the rotating rod 6 will drive the force receiving plate 61 and the anti-disengagement rod 65 thereon to rotate synchronously, so that the end of the anti-disengagement rod 65 rotates to the upper end of the J-shaped groove 66. Subsequently, during the forward movement of the mounting bracket 3, the end of the anti-disengagement rod 65 continues to move forward along the J-shaped groove 66. Due to the limitation of the J-shaped groove 66, the rotating rod 6 cannot rotate, so the circuit breaker cannot be closed, thus avoiding accidental closing during the inspection process.

[0042] Please refer to again Figure 6 、 Figure 9 and Figure 10, the oil injection part 93 includes four oil storage tanks 931 which are arranged on the outer shell 1 and above the sliding groove 921. An annular oil storage groove 932 is provided at the end of the sliding groove 921, and micropores are arranged in an array in the annular oil storage groove 932 for the oil fluid to flow out. An oil delivery groove 933 is arranged between the oil storage tank 931 and the annular oil storage groove 932. An oil storage box 934 is fixedly connected to the side of the outer shell 1, and an oil delivery pipe 935 is arranged between the oil storage box 934 and the oil storage tank 931. A piston block 936 is slidably connected in the oil storage tank 931. One side of the piston block 936 is fixedly connected to a piston rod 937, and a second compression spring 938 is fixedly connected to the piston rod 937, and the other end of the second compression spring 938 is fixedly connected to the outer shell 1. A cam 939 is rotatably connected to the second round rod 913 through a bearing; wherein, the oil injection part 93 further includes a hollow cylinder 9310 which is fixedly connected to the top surface of the cam 939. Pawls 9312 are annularly distributed and hinged to the inner ring of the hollow cylinder 9310, and a metal spring is fixedly connected between the pawls 9312 and the hollow cylinder 9310. A ratchet 9311 is fixedly installed on the second round rod 913.

[0043] In this embodiment, the cam 939 is rotatably connected to the second round rod 913. Under the synergistic action of the pawl 9312 and the ratchet 9311, it is ensured that the cam 939 can only rotate in one direction. Specifically, during the opening process of the box door, the rotation of the ratchet 9311 will not be hindered by the pawl 9312, so the cam 939 will not be driven; while during the closing process, the pawl 9312 contacts the ratchet 9311, so that the cam 939 can be driven to rotate. Lubricating oil is pre-injected into the oil storage box 934, flows into the oil storage tank 931 through the oil delivery pipe 935, and then enters the annular oil storage groove 932 from the oil storage tank 931 through the oil delivery groove 933. When the cam 939 rotates, it will push the piston rod 937, and then drive the piston block 936 to move and compress the second compression spring 938. The movement of the piston block 936 will squeeze the lubricating oil in the oil storage tank 931. The pressurized lubricating oil enters the annular oil storage groove 932 through the oil delivery groove 933 and is extruded through the micropores distributed on the annular oil storage groove 932, and is evenly smeared on the surface of the lock rod 923 to ensure the smooth connection between the lock rod 923 and the lock groove and accurately insert into the lock hole 32 to position the mounting bracket 3.

[0044] The function of the cam 939 is to promote the movement of the piston rod 937 when it rotates, and multiple convex parts should be provided on the cam 939; specifically. During the rotation of the cam 939, the convex parts on the cam 939 contact the piston rod 937 to promote the piston rod 937 to drive the piston block 936 to move, and when the convex parts on the cam 939 do not contact the piston rod 937, the piston rod 937 and the piston block 936 are reset under the action of the restoring force of the second compression spring 938.

[0045] This design ensures that no oil injection occurs when the locking rod 923 moves within the sliding groove 921, preventing excessive lubricating oil from entering the sliding groove 921 and causing blockage; the oil injection operation is only performed when the locking rod 923 moves into the lock hole 32. The excess lubricating oil in the lock hole 32 can flow into the slide rail within the housing 1 through the slot at the bottom of the lock hole 32 to lubricate the slide rail.

[0046] The working principle of the present invention is as follows: I. Core control and closing and opening mechanisms The permanent magnet assembly 5 drives the closing and opening Magnetic field control: The permanent magnet assembly 5 changes the magnetic field direction between the permanent magnet 55 and the iron core 52 within the magnetic cylinder 51 through an electrical signal to form a driving torque, driving the moving member 53 to drive the lifting rod 54 to move up and down.

[0047] Mechanical linkage: The lifting rod 54 is linked with the force-receiving plate 61 on the rotating rod 6 through a cross bar. When the rotating rod 6 rotates, it drives the Y-shaped connecting rod 64 to press down the insulating rod 41 to control the on-off of the moving contact and the static contact.

[0048] Reset guarantee: When closing, the reset spring 63 is compressed and stores energy. When opening, after the magnetic field is unbalanced, the reset spring 63 releases energy to assist in rapid opening.

[0049] The separating mechanism 7 performs emergency opening Manual backup mechanism: When the permanent magnet assembly 5 fails, rotating the handle 72 drives the dial 73 to lift the force-receiving plate 61, forcibly rotating the rotating rod 6 to achieve opening. At the same time, the magnetic field stability of the permanent magnet assembly 5 is destroyed to ensure the thoroughness of opening.

[0050] II. Safety interlock and protection mechanisms The interlock mechanism 8 forces opening Door opening synchronizes with power-off: When the cabinet door is opened, the shaft rod 2 pushes the moving block 812 to move backward through the gear set, and the push rod 813 triggers the separating mechanism 7 to open, ensuring that the circuit is disconnected when the door is opened.

[0051] Anti-misclosing lock: After opening, the anti-disengagement rod 65 on the rotating rod 6 is stuck into the J-shaped groove 66 of the housing 1 to restrict the rotation of the rotating rod 6 and prevent accidental closing during maintenance.

[0052] The positioning part 82 prevents the door from closing automatically The locking block 822 and the positioning plate 821 are interlocked: When the moving block 812 moves backward, the locking block 822 is embedded into the rectangular groove of the positioning plate 821, and the spring 823 locks to prevent the cabinet door from closing accidentally; the door can only be closed by manually pulling the ring to unlock.

[0053] III. Maintenance assistance and lubrication system The linkage part 91 unlocks the mounting bracket 3 The door unlocking lever 923 retracts: When opening the door, the second driving gear 22 drives the winding roller 925 to rotate through the transmission chain, and the traction rope 926 pulls back the locking lever 923 on the sliding block 922, disengaging from the lock hole 32 of the mounting bracket 3, allowing the mounting bracket 3 to move forward for maintenance.

[0054] The door locking lever 923 resets: When closing the door, the winding roller 925 releases the traction rope 926, and the first compression spring 924 pushes the locking lever 923 to reset and insert into the lock hole 32 to fix the mounting bracket 3.

[0055] The oil injection part 93 lubricates precisely One-way oil injection design: When closing the door, the ratchet-pawl mechanism (including the ratchet 9311 and the pawl 9312) drives the cam 939 to rotate, squeezing the piston rod 937 to press the lubricating oil in the oil storage box 934 into the annular oil storage groove 932, and evenly coating the surface of the locking lever 923 through the micropores to ensure smooth cooperation between the locking lever 923 and the lock hole 32.

[0056] Anti-blocking control: Oil is injected only when the locking lever 923 is inserted into the lock hole 32 to avoid excessive lubricating oil entering the sliding groove 921.

[0057] In addition, a spring cable is used between the wiring rod and the arc extinguishing component 4 to adapt to the deformation when the mounting bracket 3 moves and maintain a reliable electrical connection.

[0058] Those of ordinary skill in the art should understand that: The discussion of any of the above embodiments is only exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; Under the concept of the present invention, the technical features in the above embodiments or different embodiments can also be combined, and the steps can be implemented in any order, and there are many other variations in different aspects of the present invention as described above, and they are not provided in detail for the sake of brevity.

[0059] The present invention aims to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. Mine-used high voltage explosion-proof circuit breaker, characterized in that: It comprises a housing (1), the front end of the housing (1) being rotatably connected to two shafts (2) via a bearing, the bottom surface of the inner cavity of the housing (1) being slidably connected to a mounting frame (3), and the upper end of the mounting frame (3) being mounted with three arc extinguishing components (4); A permanent magnet assembly (5), wherein the permanent magnet assembly (5) is mounted on the lower end of the mounting frame (3); A rotating rod (6), the rotating rod (6) being rotatably connected to the mounting frame (3) via a bearing, and the permanent magnet assembly (5) being used to drive the rotating rod (6) to rotate so as to control the opening and closing of the circuit breaker; A release mechanism (7), the release mechanism (7) being installed at the rear end of the housing (1), and the release mechanism (7) being used to perform a release operation when a permanent magnet component (5) fails; An interlocking mechanism (8), the interlocking mechanism (8) comprising interlocking parts (81) arranged at the lower ends of both sides of the housing (1), used for synchronously opening the switch when the box door is opened, and a positioning part (82) is also arranged on the interlocking part (81); The auxiliary mechanism (9) comprises a linkage portion (91) arranged at the upper ends of both sides of the housing (1), and a limiting portion (92) and an oil injection portion (93) are also arranged on both sides of the housing (1).

2. The mining high voltage explosion-proof circuit breaker according to claim 1 is characterized in that: The rotating rod (6) is fixedly connected with a force-bearing plate (61) and a fixed plate (62); a return spring (63) is fixedly connected between the fixed plate (62) and the mounting frame (3); three groups of connecting rods (64) are fixedly connected to the rotating rod (6) and located on a side away from the force-bearing plate (61); an anti-slip rod (65) is fixedly connected to the force-bearing plate (61); both sides of the housing (1) are provided with J-shaped grooves (66), and the ends of the anti-slip rod (65) are slidably connected to the J-shaped grooves (66).

3. The mining high voltage explosion-proof circuit breaker according to claim 1 is characterized in that: The separation mechanism (7) comprises a separation rod (71), the separation rod (71) is rotatably connected to the housing (1) via a bearing, both ends of the separation rod (71) are fixedly connected to handles (72), and the middle end of the separation rod (71) is fixedly connected to a dial plate (73).

4. The mining high voltage explosion-proof circuit breaker according to claim 1 is characterized in that: The interlocking portion (81) comprises two groups of guide rods (811), the two groups of guide rods (811) are respectively fixedly connected to two sides of the housing (1), each group of guide rods (811) is slidably connected to a moving block (812), the upper end of the moving block (812) is fixedly connected to a push rod (813), the lower end of the guide rod (811) is fixedly connected to a rack (814), and the lower end of the housing (1) is provided with a mounting groove at both corners of the lower end, and a first round rod (815) is rotatably connected to the mounting groove via a bearing, and a first transmission gear (816) and a second transmission gear (817) are fixedly mounted on the first round rod (815).

5. The mining high voltage explosion-proof circuit breaker according to claim 4 is characterized in that: The positioning portion (82) comprises a clamping block (822), the clamping block (822) being slidably inserted into the moving block (812), a spring (823) being fixedly connected between the clamping block (822) and the moving block (812), and a positioning plate (821) being fixedly connected to the side of the housing (1).

6. The mining high voltage explosion-proof circuit breaker according to claim 5, characterized in that: One end of the clamping block (822) is a square block, and a pull ring is connected to the end thereof; the other end of the clamping block (822) is a trapezoidal block; and rectangular grooves are arranged in an array on the positioning plate (821).

7. The mining high voltage explosion-proof circuit breaker according to claim 1 is characterized in that: The linkage part (91) comprises four second round rods (913), the second round rods (913) being rotatably connected to a bracket on the side of the housing (1) via bearings, a third transmission gear (914) being fixedly mounted on the second round rods (913), a mounting groove being provided at both corners of the upper end of the housing (1), two third round rods (911) being rotatably connected in the mounting grooves via bearings, and two fourth transmission gears (912) being fixedly mounted on the third round rods (911).

8. The mining high voltage explosion-proof circuit breaker according to claim 7 is characterized in that: The limiting portion (92) includes four sliding grooves (921), wherein the sliding grooves (921) are opened on the outer shell (1), and a sliding block (922) is slidably connected in the sliding grooves (921), and a locking rod (923) is fixedly connected to one side of the sliding block (922), and a first compression spring (924) is fixedly connected to the other side of the sliding block (922), and the other end of the first compression spring (924) is fixedly connected to the inner wall of the sliding groove (921), and a winding roller (925) is fixedly installed at the lower end of the second round rod (913), and a traction rope (926) is fixedly connected to the winding roller (925), and the other end of the traction rope (926) is fixedly connected to the sliding block (922).

9. The mining high voltage explosion-proof circuit breaker according to claim 8, characterized in that: The oil injection portion (93) comprises four oil storage grooves (931), the oil storage grooves (931) being provided on the housing (1) and being located above the sliding groove (921), an annular oil storage groove (932) being provided at the end of the sliding groove (921), and micro-holes are provided in an array in the annular oil storage groove (932) for oil to flow out, an oil delivery groove (933) being provided between the oil storage grooves (931) and the annular oil storage grooves (932), and an oil storage box (933) being fixedly connected to the side of the housing (1) 934), an oil delivery pipe (935) is provided between the oil storage box (934) and the oil storage tank (931), a piston block (936) is slidably connected in the oil storage tank (931), a piston rod (937) is fixedly connected to one side of the piston block (936), a second compression spring (938) is fixedly connected to the piston rod (937), and the other end of the second compression spring (938) is fixedly connected to the housing (1), and a cam (939) is rotatably connected to the second round rod (913) through a bearing.

10. The mining high voltage explosion-proof circuit breaker according to claim 9, characterized in that: The oil injection portion (93) further comprises a hollow cylinder (9310), wherein the hollow cylinder (9310) is fixedly connected to the top surface of the cam (939), wherein the inner ring of the hollow cylinder (9310) is hingedly connected with a ratchet (9312) in a circular shape, and a metal spring is fixedly connected between the ratchet (9312) and the hollow cylinder (9310), and a ratchet (9311) is fixedly mounted on the second round rod (913).

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