A compact mine high-voltage explosion-proof circuit breaker

Abstract

The application belongs to the technical field of power equipment, and particularly relates to a compact high-voltage explosion-proof circuit breaker for mine, which comprises an insulating shell, an explosion-proof cabinet door, a mounting frame, a sliding seat and an arc extinguishing assembly; a permanent magnet assembly is installed at the lower end of the mounting frame; a transmission assembly is rotationally connected to the mounting frame, and the permanent magnet assembly is used to drive the transmission assembly to rotate to control the opening and closing of the circuit breaker; a hand-operated opening assembly is installed at the rear end of the insulating shell and is used to manually perform the opening operation; an interlocking assembly comprises a locking part arranged on the inner side of the insulating shell and a control part used to control the operation of the locking part; and a positioning assembly comprises a positioning part and a driving part arranged on the side of the insulating shell, and a linkage part arranged at the bottom of the insulating shell and linked with the control part. The application can eliminate the risk of opening the cover under electricity, support convenient maintenance, and improve the safety and stability of the equipment.

Description

Technical Field

[0001] This invention belongs to the field of power equipment technology, specifically relating to a compact high-voltage explosion-proof circuit breaker for mining. Background Technology

[0002] A circuit breaker is an electrical device used to control and protect circuits. It is widely used in power systems, industrial and mining enterprises, buildings, transportation, and other fields. Its main function is to quickly disconnect the circuit when a short circuit, overload, or ground fault occurs, protecting the safety of equipment and personnel. High-voltage explosion-proof circuit breakers for mining are core equipment in underground coal mine power supply systems. They must meet stringent requirements such as explosion-proof, corrosion-resistant, and impact-resistant properties. Due to the confined space inside mines, to reduce the size of the circuit breaker, its components are usually integrated into one or more assembled housings.

[0003] Traditional circuit breaker explosion-proof cabinet door interlocking designs have some shortcomings. When some circuit breakers are closed, the explosion-proof cabinet door lacks a reliable physical locking device. Operators may accidentally open the door, directly exposing themselves to a high-voltage, live environment, which can easily lead to electric shock and seriously threaten their lives. Even if some circuit breakers are equipped with interlocking devices, the linkage between the interlocking device and the circuit breaker's open / closed state is not tight enough, making interlocking prone to failure during operation and failing to effectively guarantee operational safety.

[0004] Furthermore, for ease of maintenance, some circuit breakers are designed with pull-out circuit breaker trolleys or mounting brackets. However, in existing technology, the locking and unlocking operations of the pull-out components often need to be performed manually, and there is a lack of strong mechanical linkage with the circuit breaker's open and closed states. This means that when operators pull out the mounting bracket for maintenance, there may be a risk of the circuit breaker accidentally closing (i.e., there is a lack of an effective closing prevention mechanism). Summary of the Invention

[0005] In view of this, the purpose of this invention is to provide a compact mine high-voltage explosion-proof circuit breaker that can eliminate the risk of opening the cover while energized, support convenient maintenance, and improve equipment safety and stability.

[0006] The specific technical solution adopted by this invention is as follows:

[0007] A compact mine-use high-voltage explosion-proof circuit breaker includes an insulating housing and an explosion-proof cabinet door disposed on the front of the insulating housing. A mounting bracket is slidably connected to the bottom surface of the inner cavity of the insulating housing. Two sliding blocks are fixedly connected to the upper end of the mounting bracket, and three arc-extinguishing components are installed on the upper end of the mounting bracket.

[0008] A permanent magnet assembly, which is mounted on the lower end of the mounting frame;

[0009] A transmission assembly is rotatably connected to a mounting frame, and a permanent magnet assembly is used to drive the transmission assembly to rotate in order to control the circuit breaker to open and close.

[0010] A disconnection assembly, which is installed at the rear end of the insulating housing, is used for manual disconnection operations;

[0011] An interlocking assembly, the interlocking assembly including a locking part disposed inside an insulating housing and a control part for controlling the operation of the locking part;

[0012] The positioning component includes a positioning part and a driving part disposed on the side of the insulating housing, and a linkage part disposed on the bottom of the insulating housing and linked with the control part.

[0013] In a preferred embodiment, the permanent magnet assembly includes a magnetic cylinder mounted on a mounting frame. The magnetic cylinder contains a permanent magnet, an iron core, and a movable component, as well as a vertical rod connected to the upper end of the movable component. The movable component is capable of moving along its own length.

[0014] In a preferred embodiment, the transmission assembly includes a rotating rod, which is rotatably connected to the mounting frame via a bearing. A force-bearing plate and a fixing plate are fixedly connected to the rotating rod. A return spring is fixedly connected between the fixing plate and the mounting frame. Three sets of connecting rods are fixedly connected to the rotating rod on the side away from the force-bearing plate. Pressure rods are fixedly connected to both ends of the rotating rod. Arc-shaped grooves and guide grooves are formed on both inner walls of the insulating housing.

[0015] In a preferred embodiment, the separation assembly includes a separation lever, which is rotatably connected to an insulating housing via bearings. Handles are fixedly connected to both ends of the separation lever, a lever plate is fixedly connected to the middle end of the separation lever, and a torsion spring is fixedly connected between the separation lever and the insulating housing.

[0016] In a preferred embodiment, the locking part includes a support rod, which is fixedly connected to the inner wall of the insulating housing. A flip rod is rotatably connected to the support rod via a bearing. One end of the flip rod is fixedly connected to an n-type locking block, and the other end of the flip rod is connected to a first traction rope. In addition, a first round rod is fixedly connected to the explosion-proof cabinet door, and a second round rod is fixedly connected to the first round rod.

[0017] In a preferred embodiment, the control unit includes a guide rail, which is fixedly connected to the inner wall of the insulating housing. A lifting rod is slidably connected to the guide rail, and a lifting plate is fixedly connected to the lifting rod. The lifting plate is fixedly connected to a first traction rope. A first compression spring is sleeved on the outer wall of the lifting rod, and both ends of the first compression spring are fixedly connected to the guide rail and the lifting plate, respectively.

[0018] In a preferred embodiment, the positioning part includes a movable groove formed on the insulating shell. A positioning block is slidably inserted into one end of the movable groove. A second compression spring is fixedly connected between the positioning block and the insulating shell. A second traction rope is fixedly connected to the positioning block, and a collar is fixedly connected to one end of the second traction rope.

[0019] In a preferred embodiment, the drive unit includes a support frame, which is fixedly connected to the outer wall of the insulating housing. A first rotating shaft is rotatably connected to the support frame via a bearing. A take-up roller is fixedly mounted on the first rotating shaft. A first gear is fixedly mounted on one end of the first rotating shaft. A lever is fixedly connected to the take-up roller.

[0020] In a preferred embodiment, the linkage includes a second rotating shaft, which is rotatably connected to a bracket on the inner wall of the insulating housing via a bearing. One end of the second rotating shaft extends through to the outer side of the insulating housing and is fixedly mounted with a third gear. The second gear is fixedly mounted on the second rotating shaft, and a rack is fixedly connected to the lifting rod via a support rod.

[0021] The technical effects achieved by this invention are as follows:

[0022] This invention establishes a rigid mechanical logic linking the circuit breaker's opening and closing states with the opening authority of the explosion-proof cabinet door by setting up an interlocking assembly driven by a transmission component. When the circuit breaker is in the closed state, the change in the position of the pressure rod causes the n-shaped locking block of the locking part to engage with the outside of the round rod on the explosion-proof cabinet door under the action of gravity, forming a physical barrier and forcibly preventing accidental opening of the door. Only during the circuit breaker's opening process will the pressure rod press against the control part, pulling the flip rod over via the traction rope, causing the n-shaped locking block to disengage and unlock, at which point the cabinet door can be opened. This fully mechanical linkage design does not rely on complex electronic sensors, is responsive and absolutely reliable, eliminates the safety hazard of "opening the door while it is energized" due to misoperation, and greatly improves the safety level of underground mining operations.

[0023] This invention features a self-locking function to prevent accidental closing: when the mounting bracket is pulled forward along the insulating shell for maintenance, the pressure rod on the transmission assembly enters the limit section of the guide groove, mechanically locking the rotational freedom of the rotating rod. This means that even if a control signal is falsely triggered or the permanent magnet assembly malfunctions during maintenance, the transmission assembly cannot drive the moving contact to close the circuit, ensuring the personal safety of maintenance personnel.

[0024] This invention's positioning component and linkage design significantly optimize the maintenance process. Under the action of the second compression spring, the positioning block of the positioning unit normally locks the mounting frame, ensuring stable operation. During maintenance, pulling the collar unlocks the mounting frame, reducing the risk of personnel entering the cabinet. The drive unit and linkage unit work together; when the circuit breaker is opened, the lifting plate moves downward, driving the first rotating shaft to rotate via rack and pinion transmission. The lever pulls the second traction rope to unlock, achieving linkage between opening and locking, reducing operational complexity. After maintenance, the positioning block automatically resets and locks, ensuring equipment stability, significantly improving maintenance efficiency, and providing strong support for the long-term stable operation of mining equipment. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 This is a rear view of the overall structure of the present invention;

[0028] Figure 3 This is a rear sectional view of the present invention;

[0029] Figure 4 This is a schematic diagram of the mounting bracket and its structure according to the present invention;

[0030] Figure 5 This is the present invention. Figure 4 Rear view;

[0031] Figure 6 This is a schematic diagram of the arc-shaped groove and guide groove of the present invention;

[0032] Figure 7 This is a schematic diagram of the interlocking assembly of the present invention;

[0033] Figure 8 This is the present invention. Figure 7 An enlarged schematic diagram of part A shown in the image;

[0034] Figure 9 This is the present invention. Figure 7 An enlarged schematic diagram of part B shown in the image;

[0035] Figure 10 This is a schematic diagram of the positioning part of the present invention;

[0036] Figure 11 This is a schematic diagram of the connection between the collar and the lever of the present invention;

[0037] Figure 12 This is a schematic diagram showing the connection between the arc extinguishing component and the permanent magnet component of the present invention;

[0038] Figure 13 This is a schematic diagram of the arc extinguishing component of the present invention.

[0039] The attached diagram lists the components represented by each number as follows:

[0040] 1. Insulating housing; 2. Explosion-proof cabinet door; 21. First round rod; 22. Second round rod; 3. Mounting bracket; 31. Slide block; 4. Arc extinguishing assembly; 41. Insulating rod; 5. Permanent magnet assembly; 6. Transmission assembly; 7. Separation assembly; 8. Interlocking assembly; 81. Locking part; 82. Control part; 9. Positioning assembly; 91. Positioning part; 92. Drive part; 93. Linkage part;

[0041] 51. Magnetic cylinder; 52. Iron core; 53. Moving part; 54. Vertical rod; 55. Permanent magnet;

[0042] 61. Rotating rod; 62. Force plate; 63. Fixing plate; 64. Return spring; 65. Pressure rod; 66. Arc groove; 67. Guide groove; 68. Connecting rod;

[0043] 71. Divider lever; 72. Handle; 73. Paddle shifter; 74. Torsion spring;

[0044] 811. Support rod; 812. Tilting rod; 813. N-type locking block; 814. First traction rope;

[0045] 821. Guide rail; 822. Lifting rod; 823. Lifting plate; 824. First compression spring;

[0046] 911. Movable groove; 912. Positioning block; 913. Second compression spring; 914. Second traction rope; 915. Loop;

[0047] 921. Support frame; 922. First rotating shaft; 923. Take-up roller; 924. First gear; 925. Lever;

[0048] 931. Second shaft; 932. Second gear; 933. Rack; 934. Third gear. Detailed Implementation

[0049] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments.

[0050] It should be noted that, unless otherwise defined, the technical or scientific terms used in this invention should have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0051] Please see the appendix Figures 1-5 As shown, this embodiment provides a compact mine high-voltage explosion-proof circuit breaker, including an insulating housing 1 and an explosion-proof cabinet door 2 disposed on the front of the insulating housing 1. A mounting bracket 3 is slidably connected to the bottom surface of the inner cavity of the insulating housing 1. Two slide blocks 31 are fixedly connected to the upper end of the mounting bracket 3, and a lock hole is provided on the slide block 31. Three arc extinguishing components 4 are installed on the upper end of the mounting bracket 3.

[0052] Permanent magnet assembly 5 is installed at the lower end of mounting bracket 3;

[0053] The transmission assembly 6 is rotatably connected to the mounting bracket 3. The permanent magnet assembly 5 is used to drive the transmission assembly 6 to rotate in order to control the circuit breaker to open and close.

[0054] The disconnection assembly 7 is installed at the rear end of the insulating housing 1 and is used for manual disconnection operation.

[0055] Interlocking assembly 8 includes a locking part 81 disposed inside the insulating housing 1 and a control part 82 for controlling the operation of the locking part 81;

[0056] The positioning component 9 includes a positioning part 91 and a driving part 92 disposed on the side of the insulating housing 1, and a linkage part 93 disposed on the bottom of the insulating housing 1 and linked with the control part 82.

[0057] In this embodiment, a vacuum tube is installed inside the arc-extinguishing assembly 4. Both the moving and stationary contacts are housed within the vacuum tube. The stationary contact is electrically connected to the second terminal block, and the moving contact is electrically connected to the first terminal block. An insulating rod 41 is connected to the lower end of the first terminal block, and a contact spring is installed on the insulating rod 41. When the moving and stationary contacts disconnect, the arc generated is isolated and interrupted by the vacuum tube through dielectric isolation under vacuum conditions, ensuring the normal operation of the circuit breaker. The vacuum tube is typically composed of various materials such as metal, ceramic, and insulating materials, and can withstand extreme operating conditions such as high voltage, high current, and high temperature, reducing the impact of the arc generated when the circuit breaker trips on the internal components of the circuit breaker.

[0058] The upper end of the insulating housing 1 is provided with two sets of connecting rods, each set consisting of three rods. The three connecting rods in front are electrically connected to the first connecting plates on the three arc extinguishing components 4 using spring cables, and the three connecting rods in the back are electrically connected to the second connecting plates on the three arc extinguishing components 4 using spring cables.

[0059] Secondly, please refer to again Figure 12 The permanent magnet assembly 5 includes a magnetic cylinder 51, which is mounted on the mounting frame 3. The magnetic cylinder 51 contains a permanent magnet 55, an iron core 52, and a movable part 53, as well as a vertical rod 54 connected to the upper end of the movable part 53. The movable part 53 can move along its own length.

[0060] In this embodiment, the permanent magnet assembly 5 is fixedly connected to the mounting bracket 3 by bolts. The permanent magnet assembly 5 can control the reverse rotation of the transmission assembly 6, thereby controlling the opening and closing of the circuit breaker. The permanent magnet assembly 5 includes a magnetic cylinder 51, which contains a permanent magnet 55, an iron core 52, a movable part 53, and a vertical rod 54. The movable part 53 can move along its own length, thereby controlling the opening and closing of the moving and stationary contacts. Specifically, when the operator can control the magnetic field changes of the permanent magnet 55 and the iron core 52 through electrical signals, the corresponding electrical signal is input to change the direction of the magnetic field inside the magnetic cylinder 51, so as to generate a driving torque, which drives the movable part 53 and the vertical rod 54 to move up or down. The movement of the movable part 53 then drives the transmission assembly 6 to operate, thereby opening or closing the moving and stationary contacts, and thus controlling the opening and closing state of the circuit breaker.

[0061] It should be noted that both the permanent magnet component 5 and the arc extinguishing component 4 adopt technologies or products that are already publicly available on the market. Their specific structures and working principles will not be elaborated on here. When selecting models, it is advisable to choose those that meet the requirements of this application, provided that the specifications and usage scenarios are suitable. Specific model specifications are not limited here.

[0062] Secondly, please refer to the following as well. Figures 3-6The transmission assembly 6 includes a rotating rod 61, which is rotatably connected to the mounting frame 3 via a bearing. A force-bearing plate 62 and a fixing plate 63 are fixedly connected to the rotating rod 61. A return spring 64 is fixedly connected between the fixing plate 63 and the mounting frame 3. Three sets of connecting rods 68 are fixedly connected to the rotating rod 61 on the side away from the force-bearing plate 62. The connecting rods 68 are connected to the insulating rod 41. Pressure rods 65 are fixedly connected to both ends of the rotating rod 61. Arc-shaped grooves 66 and guide grooves 67 are provided on the inner walls of both sides of the insulating housing 1.

[0063] In this embodiment, as the vertical rod 54 moves upward, it applies force to the force plate 62, causing the rotating rod 61 to rotate. The rotation of the rotating rod 61 drives the end of the connecting rod 68 to move downward, thereby driving the insulating rod 41 to move downward, and then driving the moving contact to move downward. At this time, the moving contact is disconnected from the stationary contact. In addition, when the circuit breaker is in the closed state (i.e., the moving contact is connected to the stationary contact), a stable magnetic field is formed on the permanent magnet 55 and the iron core 52 inside the magnetic cylinder 51. At this time, the bottom side of the force plate 62 abuts against the upper surface of the lever plate 73, and the return spring 64 is in a compressed state.

[0064] Secondly, please refer to again Figure 3 , Figure 7 and Figure 12 The separation assembly 7 includes a separation lever 71, which is rotatably connected to the insulating housing 1 via bearings. Both ends of the separation lever 71 are fixedly connected to handles 72, and the middle end of the separation lever 71 is fixedly connected to a lever 73. A torsion spring 74 is fixedly connected between the separation lever 71 and the insulating housing 1.

[0065] In this embodiment, when the operator needs to disconnect the circuit breaker in the closed state and cannot control the permanent magnet assembly 5 to drive the rotating rod 61 to move via an electrical signal, the operator can rotate the handle 72 to drive the disconnect rod 71 to rotate synchronously. The rotation of the disconnect rod 71 drives the lever 73 to rotate, so that one end of the lever 73 abuts against the force plate 62, and drives the force plate 62 to move upward, causing the rotating rod 61 to rotate. The upward movement of the force plate 62 will drive the vertical rod 54 and the movable part 53 to move upward. As long as the movable part 53 moves upward, it will change the direction of the magnetic field inside the magnetic cylinder 51 when it is in the closed state, thereby breaking the stable magnetic field inside the magnetic cylinder 51 and causing it to lose the torque effect of driving the movable part 53. At the same time, the return spring 64, which is in the compressed state, resets, further driving the movable part 53 to move upward. The movable part 53 continues to move upward, driving the force plate 62 to move, causing the rotating rod 61 to continue to rotate. After the rotating rod 61 rotates, the connecting rod 68 presses down the insulating rod 41, causing the moving contact to move downward, thereby opening the circuit breaker.

[0066] The load-bearing plate 62 has a sliding groove, and a crossbar is inserted into the sliding groove. The crossbar is fixedly connected to the vertical rod 54. When the vertical rod 54 is raised or lowered, the crossbar and the sliding groove cause the load-bearing plate 62 to drive the rotating rod 61 to rotate.

[0067] Please refer to it again. Figure 7 and Figure 8 The locking part 81 includes a support rod 811, which is fixedly connected to the inner wall of the insulating housing 1. A flip rod 812 is rotatably connected to the support rod 811 via a bearing. One end of the flip rod 812 is fixedly connected to an n-type locking block 813, and the other end of the flip rod 812 is connected to a first traction rope 814. In addition, a first round rod 21 is fixedly connected to the explosion-proof cabinet door 2, and a second round rod 22 is fixedly connected to the first round rod 21.

[0068] In this embodiment, when the circuit breaker is in the closed state (i.e., the moving contact is connected to the stationary contact), the pressure rod 65 does not press against the control part 82. At this time, the n-type locking block 813 is located outside the second round rod 22. When opening the explosion-proof cabinet door 2, it will be blocked because the n-type locking block 813 is stuck outside the second round rod 22, forming a physical obstruction, making it impossible for the explosion-proof cabinet door 2 to be opened smoothly. This design is to ensure the safety of operators and prevent the explosion-proof cabinet door 2 from being accidentally opened when the circuit breaker is closed, thereby preventing dangerous situations such as electric shock.

[0069] Please refer to it again. Figure 9 The control unit 82 includes a guide rail 821, which is fixedly connected to the inner wall of the insulating housing 1. A lifting rod 822 is slidably connected to the guide rail 821. A lifting plate 823 is fixedly connected to the lifting rod 822 and is fixedly connected to the first traction rope 814. A first compression spring 824 is sleeved on the outer wall of the lifting rod 822, and the two ends of the first compression spring 824 are fixedly connected to the guide rail 821 and the lifting plate 823 respectively.

[0070] In this embodiment, when it is necessary to open the explosion-proof cabinet door 2, the circuit breaker must first be tripped. During the tripping process, the rotation of the lever 61 will drive the connecting rod 68 to press down the insulating rod 41, causing the moving contact to move downward and separate from the stationary contact. At the same time, the pressure rod 65 will move with the rotation of the lever 61, starting to press the lifting plate 823 of the control unit 82, causing the lifting plate 823 and the lifting rod 822 to move downward and compress the first compression spring 824. After the lifting plate 823 is compressed and descends, it will pull the flip rod 812 around the support rod 811 through the first traction rope 814. As the flip rod 812 rotates, the n-shaped locking block 813 will gradually move away from the outside of the second round rod 22, releasing the obstruction to the opening of the explosion-proof cabinet door 2. At this time, the operator can safely open the explosion-proof cabinet door 2 to perform inspection, maintenance, and other operations on the inside of the circuit breaker.

[0071] After the operation is completed and the explosion-proof cabinet door 2 is closed, the permanent magnet component 5 controls the transmission component 6 to rotate and close the circuit breaker. After closing, the rotating rod 61 and the pressure rod 65 reset, and then the lifting plate 823 and the lifting rod 822 reset under the rebound force of the first compression spring 824. At this time, the first traction rope 814 at one end of the flip rod 812 loses tension, and because the end of the flip rod 812 with the n-type locking block 813 is heavier, the flip rod 812 flips and resets under the action of gravity, so that the n-type locking block 813 is once again located outside the second round rod 22. In this way, when the circuit breaker closes again, it can ensure that the explosion-proof cabinet door 2 will not be opened, and continue to play a safety protection role. At the same time, the coordinated design of the entire locking part 81 and the control part 82 makes the operation of the circuit breaker safer and more reliable, effectively reducing the safety hazards caused by misoperation or accidents.

[0072] Furthermore, after the explosion-proof cabinet door 2 is opened, the mounting bracket 3 can move towards the front end of the insulating housing 1 to facilitate the inspection or maintenance of the components on the mounting bracket 3, reducing the risk of personnel entering the insulating housing 1 for inspection or maintenance. At this time, the circuit breaker has already tripped. After tripping, the rotating rod 61 drives the pressure rod 65 to rotate downwards along the arc-shaped groove 66. When the mounting bracket 3 and the transmission assembly 6 move towards the front end, the pressure rod 65 moves along the guide groove 67. Due to the restriction of the guide groove 67, the rotating rod 61 cannot rotate, so the circuit breaker cannot be closed at this time, thus avoiding accidental closing during maintenance. At the same time, the lifting plate 823 is also in a depressed state, and the locking part 81 cannot be reset.

[0073] Please refer to it again. Figure 2 and Figure 10 The positioning part 91 includes a movable groove 911, which is formed on the insulating shell 1. A positioning block 912 is slidably inserted into one end of the movable groove 911. A second compression spring 913 is fixedly connected between the positioning block 912 and the insulating shell 1. A second traction rope 914 is fixedly connected to the positioning block 912. A collar 915 is fixedly connected to one end of the second traction rope 914.

[0074] In this embodiment, to ensure the stability of the mounting bracket 3 inside the insulating housing 1, during normal use, the positioning block 912 extends out of the movable groove 911 under the action of the second compression spring 913 and inserts into the locking hole on the slide block 31. At this time, the mounting bracket 3 is fixed, preventing it from sliding freely inside the insulating housing 1. When it is necessary to inspect or maintain the components on the mounting bracket 3, the operator can pull the collar 915, which, through the second traction rope 914, drives the positioning block 912 to overcome the elastic force of the second compression spring 913, causing it to retract into the movable groove 911, thereby releasing the lock on the mounting bracket 3. In this way, the mounting bracket 3 can move smoothly to the front end of the insulating housing 1, facilitating the operator's operation of the components.

[0075] During the movement of the mounting bracket 3, the positioning block 912 remains in the retracted movable slot 911 until the inspection or maintenance work is completed and the mounting bracket 3 is pushed back to its original position. At this time, the collar 915 is released, and the positioning block 912 extends out of the movable slot 911 again under the action of the second compression spring 913, inserts into the locking hole of the slide block 31, and re-fixes the mounting bracket 3, ensuring the stability and safety of the circuit breaker during normal operation.

[0076] Please refer to it again. Figure 2 and Figure 7 The drive unit 92 includes a support frame 921, which is fixedly connected to the outer wall of the insulating housing 1. A first rotating shaft 922 is rotatably connected to the support frame 921 via a bearing. A take-up roller 923 is fixedly mounted on the first rotating shaft 922. A first gear 924 is fixedly mounted on one end of the first rotating shaft 922. A lever 925 is fixedly connected to the take-up roller 923.

[0077] In this embodiment, the drive unit 92 operates by using external power to rotate the first shaft 922. When external power is applied to the first gear 924, the first gear 924 drives the first shaft 922 to rotate as well. The rotation of the first shaft 922 causes the take-up roller 923 to rotate as well, and the lever 925 fixedly connected to the take-up roller 923 will perform a circular motion as the take-up roller 923 rotates. The collar 915 on the second traction rope 914 can be pre-fitted onto the lever 925, so that when the lever 925 performs a circular motion, it can pull the second traction rope 914 to release the lock on the mounting frame 3.

[0078] Meanwhile, the fixed connection of the support frame 921 ensures the stability of the entire drive unit 92. The first rotating shaft 922, rotatably connected by bearings, ensures smooth rotation and reduces friction and wear during rotation. Moreover, the first gear 924 allows the drive unit 92 to be easily connected to an external power source to achieve power input.

[0079] Please refer to it again. Figure 7 and Figure 9 The linkage 93 includes a second rotating shaft 931, which is rotatably connected to a bracket on the inner wall of the insulating housing 1 via a bearing. One end of the second rotating shaft 931 extends to the outer side of the insulating housing 1 and is fixedly mounted with a third gear 934. A second gear 932 is fixedly mounted on the second rotating shaft 931. A rack 933 is fixedly connected to the lifting rod 822 via a support rod.

[0080] In this embodiment, when the lifting plate 823 and the lifting rod 822 move downwards, they drive the rack 933 fixedly connected to them to move downwards synchronously. The rack 933 meshes with the second gear 932, thereby driving the second rotating shaft 931 and the third gear 934 on it to rotate. The third gear 934 drives the first gear 924 through a toothed belt, thereby driving the first rotating shaft 922 to rotate. This linkage design enables the various components of the entire device to work together, achieving efficient power transmission and action execution.

[0081] It should be noted that the collar 915 can be selectively fitted onto the lever 925 as needed, so as to selectively release the fixing effect on the mounting bracket 3 during the opening operation.

[0082] The working principle of this invention is as follows:

[0083] Under normal conditions, the positioning block 912 of the positioning component 9, under the action of the second compression spring 913, inserts into the locking hole of the slide block 31, firmly locking the mounting bracket 3 and ensuring stable operation of the circuit breaker. The permanent magnet component 5 is controlled by an electrical signal to change the magnetic field direction between the permanent magnet 55 and the iron core 52 inside the magnetic cylinder 51, generating a driving torque that drives the moving part 53 and the vertical rod 54 to move, thereby rotating the rotating rod 61 of the transmission component 6. The rotating rod 61, through the connecting rod 68, drives the insulating rod 41 to move, causing the moving contact of the arc-extinguishing component 4 to close or open with the stationary contact, realizing the closing and opening of the circuit breaker. Simultaneously, the vacuum tube, with its vacuum dielectric isolation characteristics, quickly extinguishes the opening arc, ensuring safe circuit interruption. When the electrical control fails and manual opening is required, the operator rotates the handle 72 of the opening component 7, which, through the lever 73, pushes the force plate 62, causing the rotating rod 61 to rotate, thus opening the circuit breaker. During the tripping process, the pressure rod 65 on the rotating rod 61 presses against the lifting plate 823 of the control unit 82, and pulls the flip rod 812 of the locking part 81 to rotate through the first traction rope 814, causing the n-type locking block 813 to disengage from the second round rod 22 of the explosion-proof cabinet door 2, releasing the cabinet door lock and facilitating safe opening and maintenance. After opening the cabinet, the mounting frame 3 moves forward, and the pressure rod 65 moves along the guide groove 67. Restricted by the guide groove 67, the rotating rod 61 cannot rotate, preventing accidental closing during maintenance. The rack 933 of the linkage part 93 moves down with the lifting rod 822, and drives the first rotating shaft 922 of the drive part 92 to rotate through gear transmission. The lever 925 pulls the second traction rope 914, releasing the locking of the positioning block 912 on the mounting frame 3, facilitating maintenance operations. After maintenance is completed, all components are reset, and the circuit breaker returns to normal operation, ensuring safe and efficient mining operations in all aspects.

[0084] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the invention (including the claims) is limited to these examples; within the framework of the invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in the details for the sake of brevity.

[0085] This invention is intended 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 this invention should be included within the scope of protection of this invention.

Claims

1. A compact high-voltage explosion-proof circuit breaker for mining, characterized in that: It includes an insulating housing (1) and an explosion-proof cabinet door (2) disposed on the front of the insulating housing (1). The bottom surface of the inner cavity of the insulating housing (1) is slidably connected to a mounting bracket (3). Two sliding blocks (31) are fixedly connected to the upper end of the mounting bracket (3). Three arc-extinguishing components (4) are installed on the upper end of the mounting bracket (3). A permanent magnet assembly (5) is mounted on the lower end of the mounting bracket (3); The transmission assembly (6) is rotatably connected to the mounting frame (3), and the permanent magnet assembly (5) is used to drive the transmission assembly (6) to rotate in order to control the circuit breaker to open and close. The disconnection assembly (7) is installed at the rear end of the insulating housing (1) and is used for manual disconnection operation; Interlocking assembly (8), the interlocking assembly (8) includes a locking part (81) disposed inside the insulating housing (1) and a control part (82) for controlling the operation of the locking part (81). The positioning component (9) includes a positioning part (91) and a driving part (92) disposed on the side of the insulating housing (1), and a linkage part (93) disposed on the bottom of the insulating housing (1) and linked with the control part (82).

2. A compact mine high-voltage explosion-proof circuit breaker according to claim 1, characterized in that: The permanent magnet assembly (5) includes a magnetic cylinder (51), which is mounted on a mounting frame (3). The magnetic cylinder (51) contains a permanent magnet (55), an iron core (52), and a movable part (53), as well as a vertical rod (54) connected to the upper end of the movable part (53). The movable part (53) can move along its own length.

3. A compact mine-use high-voltage explosion-proof circuit breaker according to claim 1, characterized in that: The transmission assembly (6) includes a rotating rod (61), which is rotatably connected to the mounting frame (3) via a bearing. A force plate (62) and a fixing plate (63) are fixedly connected to the rotating rod (61). A return spring (64) is fixedly connected between the fixing plate (63) and the mounting frame (3). Three sets of connecting rods (68) are fixedly connected to the rotating rod (61) on the side away from the force plate (62). Pressure rods (65) are fixedly connected to both ends of the rotating rod (61). Arc grooves (66) and guide grooves (67) are provided on both sides of the inner wall of the insulating shell (1).

4. A compact mine-use high-voltage explosion-proof circuit breaker according to claim 1, characterized in that: The separation assembly (7) includes a separation lever (71), which is rotatably connected to the insulating housing (1) via a bearing. Both ends of the separation lever (71) are fixedly connected to handles (72), and the middle end of the separation lever (71) is fixedly connected to a lever plate (73). A torsion spring (74) is fixedly connected between the separation lever (71) and the insulating housing (1).

5. A compact mine-use high-voltage explosion-proof circuit breaker according to claim 1, characterized in that: The locking part (81) includes a support rod (811), which is fixedly connected to the inner wall of the insulating shell (1). A flip rod (812) is rotatably connected to the support rod (811) via a bearing. An n-type locking block (813) is fixedly connected to one end of the flip rod (812), and a first traction rope (814) is connected to the other end of the flip rod (812). In addition, a first round rod (21) is fixedly connected to the explosion-proof cabinet door (2), and a second round rod (22) is fixedly connected to the first round rod (21).

6. A compact mine-use high-voltage explosion-proof circuit breaker according to claim 5, characterized in that: The control unit (82) includes a guide rail (821), which is fixedly connected to the inner wall of the insulating housing (1). A lifting rod (822) is slidably connected to the guide rail (821). A lifting plate (823) is fixedly connected to the lifting rod (822), and the lifting plate (823) is fixedly connected to the first traction rope (814). A first compression spring (824) is sleeved on the outer wall of the lifting rod (822), and the two ends of the first compression spring (824) are fixedly connected to the guide rail (821) and the lifting plate (823) respectively.

7. A compact mine-use high-voltage explosion-proof circuit breaker according to claim 1, characterized in that: The positioning part (91) includes a movable groove (911), which is opened on the insulating shell (1). A positioning block (912) is slidably inserted into one end of the movable groove (911). A second compression spring (913) is fixedly connected between the positioning block (912) and the insulating shell (1). A second traction rope (914) is fixedly connected to the positioning block (912), and a collar (915) is fixedly connected to one end of the second traction rope (914).

8. A compact mine-use high-voltage explosion-proof circuit breaker according to claim 1, characterized in that: The drive unit (92) includes a support frame (921), which is fixedly connected to the outer wall of the insulating shell (1). A first rotating shaft (922) is rotatably connected to the support frame (921) via a bearing. A take-up roller (923) is fixedly installed on the first rotating shaft (922). A first gear (924) is fixedly installed at one end of the first rotating shaft (922). A lever (925) is fixedly connected to the take-up roller (923).

9. A compact mine-use high-voltage explosion-proof circuit breaker according to claim 6, characterized in that: The linkage (93) includes a second rotating shaft (931), which is rotatably connected to a bracket on the inner wall of the insulating housing (1) via a bearing. One end of the second rotating shaft (931) extends through to the outside of the insulating housing (1) and is fixedly mounted with a third gear (934). A second gear (932) is fixedly mounted on the second rotating shaft (931). A rack (933) is fixedly connected to the lifting rod (822) via a support rod.

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