Mining high-explosion cabinet three-station circuit breaker combined electric appliance

Abstract

The invention provides a mining high-explosion cabinet three-station circuit breaker combined electric appliance, which comprises a three-station solid-sealed polar pole, an isolating switch driving mechanism, a vacuum circuit breaker operating mechanism and a grounding switch driving mechanism which are positioned in a high-explosion cabinet and integrated on a fixed mounting frame on a chassis truck, the three-station solid-sealed polar pole comprises a polar pole body integrally formed by epoxy resin, and an isolating switch, a vacuum arc-extinguishing chamber, a wire outlet end and an insulating pull rod which are fixedly sealed in an inner cavity of the polar pole body in an insulating manner. According to the invention, a highly integrated design is adopted, the structural layout is optimized, the occupation requirement of a mine power distribution space is reduced, the chassis truck can be directly moved out for maintenance or replacement, the grounding action can be completed without additionally operating a circuit breaker switch to be switched on, and the working efficiency is improved. The mining circuit breaker overcomes the defects of an existing mining circuit breaker product in the aspects of structural design, installation and use, maintenance and repair and safety and reliability, improves the insulating performance and environmental adaptability, simplifies the operation process, and reduces the maintenance difficulty.

Description

Mining high explosive switch three-position circuit breaker combination electrical appliance Technical Field

[0001] This invention belongs to the field of circuit breaker technology, specifically relating to a three-position circuit breaker combination appliance for mining high-explosive cabinets. Background Technology

[0002] my country's power technology has developed rapidly, especially the conventional circuit breaker industry, which has seen continuous advancements in technology and intelligence. However, the development of circuit breakers for special applications has been slow due to barriers in certain industries. In recent years, the country has put forward requirements for "digital mines" and "intelligent mines" for mining products, which has also placed new demands on mining circuit breakers. In addition to meeting conventional power distribution, control, and protection needs, mining products are required to meet safe and reliable operation requirements. This necessitates the development of mining switches towards intelligence, integration, and safety, and the demand for highly integrated intelligent power products for mining is increasing.

[0003] Currently, the power distribution systems in China's mining industry generally use conventional mine-use withdrawable explosion-proof circuit breakers and independent grounding switches; another option is a fixed-installation combination switch. These two combinations currently dominate the market, but they have the following drawbacks: 1) When using withdrawable explosion-proof circuit breakers and independent grounding switches, the internal cavity of the explosion-proof cabinet is arranged separately. It is necessary to simultaneously ensure the insulation distance between the circuit breaker, grounding switch, and cabinet. Therefore, the overall depth and width of the explosion-proof cabinet are relatively large, requiring a large power distribution space in the mine and resulting in higher costs; 2) Some withdrawable explosion-proof circuit breakers use a semi-enclosed insulating cylinder structure for the conductive circuit, with the arc-extinguishing chamber and most of the conductive... 1) Exposed components are affected by the dampness and highly polluted dust in the mine, which greatly reduces the service life of the equipment; 2) Fixed combination switches, as the name suggests, are fixed in the high-voltage explosion-proof cabinet. When the product fails, it cannot be moved directly. The power supply in the entire mine must be disconnected, and the whole unit must be dismantled for repair or replacement. This may have serious consequences in the mine; 3) The mainstream fixed combination switches on the market, due to the design of the high-voltage incoming line direction, isolation device and grounding position, require the operation of the vacuum interrupter to close the circuit after the isolation device reaches the grounding position in order to truly complete the grounding. The process is complicated and prone to failure; Therefore, it is necessary to improve the above-mentioned problems. Summary of the Invention

[0004] The technical problem solved by this invention is to provide a three-position circuit breaker combination electrical appliance for mining high-explosive cabinets. This highly integrated design integrates the three-position solid-sealed poles, the disconnector drive mechanism, the vacuum circuit breaker operating mechanism, and the grounding switch drive mechanism onto a chassis vehicle. This optimizes the structural layout, reduces the space required for mine power distribution, and allows the chassis vehicle to be directly moved out for maintenance or replacement. Grounding can be completed without additional operation of the circuit breaker switch closing. This addresses the deficiencies of existing mining circuit breaker products in terms of structural design, installation, maintenance, and safety reliability. It reduces equipment size, improves insulation performance and environmental adaptability, simplifies operation procedures, reduces maintenance difficulty, and ensures the safe, stable, and efficient operation of the mine power distribution system, meeting the high standards required for mining power equipment in digital and intelligent mines.

[0005] The technical solution adopted in this invention is a three-position circuit breaker combination electrical appliance for mining high-explosive cabinets, comprising a three-position solid-sealed pole, a disconnecting switch drive mechanism, a vacuum circuit breaker operating mechanism, and a grounding switch drive mechanism, all located within the high-explosive cabinet and integrated on a mounting frame fixed to the chassis. The three-position solid-sealed pole includes a pole body integrally molded with epoxy resin, a disconnecting switch insulated and solidified within the pole body's cavity, a vacuum interrupter, an output terminal, and an insulating pull rod. The middle part of the disconnecting switch is connected to the upper end of the vacuum interrupter, and the lower end of the vacuum interrupter, adapted and connected to the output terminal, is connected to the insulating pull rod. The upper end is connected, and the left end of the disconnecting switch is connected to the disconnecting switch drive mechanism. Under the drive of the disconnecting switch drive mechanism, the operating end of the disconnecting switch is connected or disconnected with the incoming line end fixed on the right side of the upper end of the pole body. The vacuum circuit breaker operating mechanism is connected to the lower end of the insulating pull rod by rotating the transmission crank arm set on the mounting bracket. When the vacuum circuit breaker operating mechanism drives the transmission crank arm to move the lower end of the insulating pull rod up and down, the on and off control of the vacuum interrupter is realized. A grounding contact is fixed on the side wall of the outgoing line end, and the grounding on and off state of the grounding contact is controlled by the grounding switch drive mechanism.

[0006] The disconnecting switch includes a three-position moving contact, an inlet terminal, an isolation conductive element, and an insulating screw. The inner cavities at the upper and lower ends of the pole body are interconnected and form a T-shape. The isolation conductive element located in the upper inner cavity of the pole body is installed and fixed at the position where the lower inner cavity of the pole body communicates with the upper inner cavity. The insulating sleeve on the right side of the isolation conductive element is insulated and fixed in the upper inner cavity of the pole body. The three-position moving contact with two ends adapted to the isolation conductive element and the inlet terminal is guided and installed in the insulating sleeve. The right end of the insulating screw located in the upper inner cavity of the pole body and passing through the isolation conductive element is threadedly connected to the T-shaped sleeve fixed in the insulating sleeve. The disconnecting switch driving mechanism is connected to the left end of the insulating screw. When the disconnecting switch driving mechanism drives the insulating screw to rotate forward and backward to control the three-position moving contact to move to the right or left, the on / off control between the isolation conductive element and the inlet terminal is realized.

[0007] Furthermore, the disconnecting switch drive mechanism includes an disconnecting drive motor and a driven gear. The disconnecting drive motor is mounted on the upper end of the mounting bracket. The left end of the insulating screw extends out of the pole body and is rotatably supported in the mounting bracket. The driven gear fixed to the left end of the insulating screw meshes with the driving gear fixed on the output shaft of the disconnecting drive motor, and the disconnecting drive motor drives the insulating screw to rotate clockwise or counterclockwise.

[0008] Furthermore, the vacuum interrupter, the outlet end, and the insulating pull rod are distributed vertically and insulatedly fixed in the inner cavity of the lower end of the pole body, and the outlet end is located at the opening position in the middle of the inner cavity of the lower end of the pole body. One end of the grounding contact is fixed to the left side wall of the outlet end by bolts.

[0009] Furthermore, the grounding switch drive mechanism includes a grounding drive motor, a worm gear, a grounding main shaft, and a grounding switch. The grounding drive motor is mounted on a mounting frame via a support bracket, and a driving gear driven by the grounding drive motor meshes with a driven gear fixed on the worm gear. The worm gear and the grounding main shaft are vertically distributed and rotatably supported on the mounting frame, and the worm gear meshes with a worm wheel mounted on the grounding main shaft. A crank arm and a grounding switch are fixed on the grounding main shaft. The outer end of the crank arm is rotatably connected to the upper end of a grounding spring hinged to the lower end on the mounting frame. The outer end of the grounding switch consists of two spaced-apart grounding blades, and a slotted pin passes through a long slot on the two grounding blades and a pad between the two grounding blades, which is adapted to the snap ring. A spring fitted on the slotted pin is provided between the outer wall of the grounding blade and the snap ring on the same side. When the grounding drive motor drives the grounding main shaft to rotate the grounding switch until the left end contact plate of the grounding contact is inserted between the two grounding blades, the grounding switch makes contact with the grounding contact and closes the circuit.

[0010] The advantages of this invention compared to existing technologies are as follows: 1. This technical solution integrates the three-position solid-sealed pole, disconnector drive mechanism, vacuum circuit breaker operating mechanism, and grounding switch drive mechanism, all integrally molded with epoxy resin, onto a chassis vehicle. This optimizes the structural layout, significantly reduces the depth and width of the explosion-proof cabinet, lowers the space requirements for mine power distribution, and simultaneously reduces equipment manufacturing and installation costs. 2. This technical solution uses an integral epoxy resin molding process for the three-position solid-sealed pole, integrally sealing key conductive components such as the disconnector switch, vacuum interrupter, outgoing terminal, and insulating pull rod. This avoids the problem of exposed interrupter and conductive components in traditional semi-enclosed insulating cylinder structures, effectively resisting the erosion of the humid and highly polluted dust environment in mines, and significantly improving the insulation performance and service life of the equipment. 3. This technical solution integrates the equipment into a mobile... On the chassis, when a product malfunctions, there is no need to disconnect the entire mine power supply and dismantle the explosion-proof cabinet. The chassis can be directly moved out for repair or replacement, greatly reducing maintenance difficulty, minimizing downtime, and avoiding safety accidents and economic losses that may be caused by prolonged power outages. 4. This technical solution optimizes the design of the grounding switch drive mechanism and the three-position solid-sealed pole, eliminating the need for additional operation of the vacuum interrupter to close the circuit, thus simplifying the operation process, reducing the error rate, and improving the safety and reliability of equipment operation. 5. In this technical solution, both the isolating switch and the grounding switch are driven by motors, with power transmission achieved through gear and worm gear transmission mechanisms. This results in high driving precision, stable operation, and accurate control of the operation status of each switch, meeting the requirements of the mine power distribution system for accurate equipment operation. Attached Figure Description

[0011] Figure 1 is a schematic diagram of the structure of the present invention; Figure 2 is a schematic diagram of the state when the grounding switch of the present invention is closed; Figure 3 is a schematic diagram of the state when the grounding switch of the present invention is de-grounded; Figure 4 is a schematic diagram of the internal structure of the three-position solid-sealed pole of the present invention; Figure 5 is a schematic diagram of the cooperation structure between the disconnecting switch drive mechanism and the three-position solid-sealed pole of the present invention; Figure 6 is a schematic diagram of the cooperation structure between the three-position solid-sealed pole and the transmission crank arm of the present invention. Detailed Implementation

[0012] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to Figures 1-6. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0013] It should be noted that, unless otherwise stated herein, the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are used only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," and "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0014] In this document, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0015] The mining high-explosive switchgear three-position circuit breaker combination electrical appliance, as shown in Figures 1-6, includes a three-position solid-sealed pole 2 located inside the high-explosive switchgear (i.e., high-voltage explosion-proof switchgear) and integrated on a mounting frame 7 fixed on a chassis vehicle 1, a disconnecting switch drive mechanism 3, a vacuum circuit breaker operating mechanism 4, and a grounding switch drive mechanism 5. The entire structure can be moved in and out by the chassis vehicle 1, facilitating later maintenance and replacement. The three-position solid-sealed pole 2 includes a pole body 2-1 integrally molded with epoxy resin, a disconnecting switch 2-2 insulated and solidified in the inner cavity of the pole body 2-1, and a vacuum interrupter. 2-3, the outgoing terminal 2-5, and the insulating pull rod 2-6 completely encapsulate the main conductive circuit within epoxy resin, which is resistant to aging. This allows it to be used in the humid and highly polluted dusty environment of mines while ensuring the insulation distance between the circuit breaker and the grounding switch. This provides conditions for reducing the overall depth and width of the explosion-proof cabinet. During the molding process of the pole body 2-1, the dimensional accuracy of the inner cavity is ensured to guarantee the installation accuracy of the disconnecting switch 2-2 and the vacuum interrupter 2-3. The middle part of the disconnecting switch 2-2 is connected to the upper end of the vacuum interrupter 2-3 and to the outgoing terminal. The lower end of the vacuum interrupter 2-3, which is adapted to be connected to end 2-5, is connected to the upper end of the insulating pull rod 2-6. The left end of the disconnecting switch 2-2 is connected to the disconnecting switch drive mechanism 3, and under the drive of the disconnecting switch drive mechanism 3, the operating end of the disconnecting switch 2-2 is connected or disconnected with the inlet end 2-21, which is fixed to the upper right side of the pole body 2-1. The vacuum circuit breaker operating mechanism 4 is connected to the lower end of the insulating pull rod 2-6 by rotating the transmission crank arm 6, which is mounted on the mounting bracket 7. The vacuum circuit breaker operating mechanism 4 drives the transmission crank arm 6 to lift the lower end of the insulating pull rod 2-6. When the circuit breaker is de-energized, the on / off control of the vacuum interrupter 2-3 is realized. A grounding contact 2-4 is fixed on the side wall of the outgoing terminal 2-5, and the grounding on / off state of the grounding contact 2-4 is controlled by the grounding switch drive mechanism 5. The grounding contact 2-4 is directly fixed on the side wall of the outgoing terminal 2-5. There is no need to operate the vacuum interrupter 2-3 to close the circuit. The grounding action can be truly completed by grounding the grounding contact 2-4 under the control of the grounding switch drive mechanism 5. The vacuum circuit breaker operating mechanism 4 is not improved in this structure and the existing structure can be used. It will not be described in detail here.

[0016] In the aforementioned structure, the three-position solid-sealed pole 2-1, the disconnector switch drive mechanism 3, the vacuum circuit breaker operating mechanism 4, and the grounding switch drive mechanism 5, all integrally molded with epoxy resin, are integrated onto the chassis vehicle 1. This optimizes the structural layout, significantly reduces the depth and width of the explosion-proof cabinet, lowers the space requirements for mine power distribution, and simultaneously reduces equipment manufacturing and installation costs. The three-position solid-sealed pole 2-1, using an integral epoxy resin molding process, integrally seals the key conductive components—disconnector switch 2-2, vacuum interrupter 2-3, outgoing terminal 2-5, and insulating pull rod 2-6—avoiding the problem of exposed interrupters and conductive components in traditional semi-enclosed insulating cylinder structures, effectively resisting the damp and highly polluted dust environment inside the mine. The environmental erosion significantly improves the insulation performance and service life of the equipment; the equipment is integrated on a mobile chassis 1, so when the product fails, there is no need to disconnect the entire mine power supply and remove the explosion-proof cabinet as a whole. The chassis can be moved directly for repair or replacement, which greatly reduces maintenance difficulty, reduces downtime, and avoids safety accidents and economic losses that may be caused by prolonged power outages; by optimizing the cooperation design between the grounding switch drive mechanism 5 and the three-position solid-sealed pole 2-1, the grounding action can be completed without additional operation of the vacuum interrupter 2-3, simplifying the operation process, reducing the operation error rate, and improving the safety and reliability of equipment operation; as shown in Figure 4-6, the specific structure of the disconnecting switch 2-2 The disconnector switch 2-2 includes a three-position moving contact 2-22, an inlet terminal 2-21, an isolation conductive element 2-23, and an insulating screw 2-24. The inner cavities at the upper and lower ends of the pole body 2-1 are interconnected and form a T-shape. The isolation conductive element 2-23, located in the upper inner cavity of the pole body 2-1, is installed and fixedly sealed at the position where the lower inner cavity of the pole body 2-1 communicates with the upper inner cavity. The insulating sleeve 2-25 on the right side of the isolation conductive element 2-23 is insulated and fixedly sealed in the upper inner cavity of the pole body 2-1. The insulating sleeve 2-25 is guided and installed with a three-position moving contact 2-22 (i.e., the isolation conductive element 2-22) whose two ends are respectively adapted to the isolation conductive element 2-23 and the inlet terminal 2-21. 3. A guide stud is installed at the top. The lower end of the guide stud is adapted to the guide groove on the outer wall of the three-position moving contact 2-22 to ensure the stability of the axial movement of the three-position moving contact 2-22 in the insulating sleeve 2-25 and avoid circumferential rotation. The right end of the insulating screw 2-24, which is located in the inner cavity of the upper end of the pole body 2-1 and passes through the isolation conductive element 2-23, is threadedly connected to the T-shaped sleeve 2-26 fixed in the insulating sleeve 2-25. The disconnecting switch driving mechanism 3 is connected to the left end of the insulating screw 2-24. When the disconnecting switch driving mechanism 3 drives the insulating screw 2-24 to rotate forward and reverse to control the three-position moving contact 2-22 to move to the right or left, the on / off control of the isolation conductive element 2-23 and the inlet terminal 2-21 is realized.The insulating sleeve 2-25 is made of high-strength insulating material, and its outer wall is tightly sealed to the inner wall of the upper end of the pole body 2-1. The three-position moving contact 2-22 is made of copper alloy material with excellent conductivity, and its two ends are silver-plated on the contact surfaces with the isolation conductive component 2-23 and the inlet terminal 2-21, respectively, to reduce contact resistance.

[0017] As shown in Figure 5, the specific structure of the disconnecting switch drive mechanism 3 is as follows: The disconnecting switch drive mechanism 3 includes an disconnecting drive motor 3-1 and a driven gear 3-2. The disconnecting drive motor 3-1 is mounted on the upper end of the mounting frame 7. The left end of the insulating screw 2-24 extends out of the pole body 2-1 and is rotatably supported in the mounting frame 7. The driven gear 3-2, which is fixed to the left end of the insulating screw 2-24, meshes with the driving gear fixed on the output shaft of the disconnecting drive motor 3-1, and the disconnecting drive motor 3-1 drives the insulating screw 2-24 to rotate clockwise or counterclockwise.

[0018] In the above structure, as shown in Figure 5, the isolation drive motor 3-1 drives the driven gear 3-2 to rotate through the driving gear, so that the driven gear 3-2 drives the insulating screw 2-24 to rotate synchronously. The insulating screw 2-24 drives the three-position moving contact 2-22 to move towards the conductive part of the incoming end 2-21, connecting the incoming end 2-21 and the isolation conductive part 2-23, completing the isolation closing operation. When the isolation drive motor 3-1 rotates in the opposite direction, the insulating screw 2-24 drives the three-position moving contact 2-22 to move towards the isolation conductive part 2-23 until the three-position moving contact 2-22 is completely disengaged from the incoming end 2-21, completing the isolation opening operation.

[0019] As shown in Figure 4-6, the vacuum interrupter 2-3, the outlet end 2-5, and the insulating pull rod 2-6 are distributed vertically and insulatedly fixed in the inner cavity of the lower end of the pole body 2-1. The outlet end 2-5 is located at the opening position in the middle of the inner cavity of the lower end of the pole body 2-1. One end of the grounding contact 2-4 is fixed to the left side wall of the outlet end 2-5 by bolts.

[0020] As shown in Figure 2-3, the specific structure of the grounding switch drive mechanism 5 is as follows: The grounding switch drive mechanism 5 includes a grounding drive motor 5-1, a worm gear 5-2, a grounding main shaft 5-3, and a grounding switch 5-4. The grounding drive motor 5-1 is mounted on the mounting frame 7 via a support frame 8, and the driving gear 5-5 driven by the grounding drive motor 5-1 meshes with the driven gear 5-6 fixed on the worm gear 5-2. The worm gear 5-2 and the grounding main shaft 5-3 are vertically distributed and rotatably supported on the mounting frame 7, and the worm gear 5-2 meshes with the worm wheel 5-7 mounted on the grounding main shaft 5-3. A crank arm 5-8 and a grounding switch 5-4 are fixed on the grounding main shaft 5-3. The outer end of the crank arm 5-8 is rotatably connected to the upper end of the grounding spring 5-10, which is hinged to the lower end on the mounting frame 7 (that is, the upper end of the grounding spring 5-10 and the crank arm 5-4 can be connected by a pin connection structure). (For the purpose of relative rotation of the outer ends of arm 5-8), the outer end of the grounding switch 5-4 consists of two spaced-apart grounding blades, and the slotted pin 5-9 passes through the long slots on the two grounding blades and the pad between the two grounding blades and is adapted to the retaining spring. A spring fitted on the slotted pin 5-9 is provided between the outer wall of the grounding blade and the retaining spring on the same side. When the grounding drive motor 5-1 drives the grounding main shaft 5-3 to rotate the grounding switch 5-4 until the left end contact plate of the grounding contact 2-4 is inserted between the two grounding blades, the grounding switch 5-4 and the grounding contact 2-4 are made to contact and close. That is, when the grounding switch 5-4 rotates until the left end contact plate of the grounding contact 2-4 is inserted between the two grounding blades, under the action of the spring, the outer ends of the two grounding blades open outward, so that the left end contact plate of the grounding contact 2-4 is smoothly inserted between the two grounding blades and abuts against the corresponding position of the grounding blade.

[0021] In the above structure, both the disconnecting switch 2-2 and the grounding switch are driven by motors, and power is transmitted through a gear and worm gear transmission mechanism. This ensures high driving precision and stable operation, accurately controlling the operating state of each switch and meeting the accuracy requirements of the mine power distribution system. As shown in Figure 2-3, the grounding switch operates as follows: the grounding drive motor 5-1 drives the worm gear 5-2, which in turn rotates the worm wheel 5-7, thereby rotating the grounding main shaft 5-3. Simultaneously, this compresses the grounding spring 5-10. When the grounding main shaft 5-3 rotates to a certain angle, the grounding spring 5-10 and the grounding main shaft 5-3... When the angle between the grounding spring 5-10 and the grounding contact 2-4 passes through 180°, the grounding spring 5-10 releases energy, pushing the grounding switch 5-4 to connect and conduct (as shown in Figure 2), completing the grounding switch closing operation. The grounding switch remains closed under the pressure of the grounding spring 5-10. When the grounding drive motor 5-1 rotates in the reverse direction, it drives the grounding main shaft 5-4 to rotate. After the angle between the grounding spring 5-10 and the grounding main shaft 5-3 passes through 180°, the grounding spring 5-10 pushes the grounding switch to separate from the grounding contact, completing the grounding switch opening operation (as shown in Figure 3). The grounding switch remains open under the pressure of the grounding spring 5-10. The grounding operation can directly ground the outgoing terminal without passing through the vacuum interrupter 2-3.

[0022] Isolation closing operation: When the equipment needs to be closed for power supply, first control the isolation drive motor 3-1 of the isolating switch drive mechanism 3 to rotate forward, which drives the driven gear 3-2 to rotate through the active gear, thereby driving the insulating screw 2-24 to rotate. The insulating screw 2-24 is threadedly engaged with the T-shaped sleeve 2-26, driving the three-position moving contact 2-22 to move to the right until both ends of the three-position moving contact 2-22 are in close contact with the isolating conductive element 2-23 and the incoming line end 2-21 respectively, and the isolating switch 2-2 closes; Isolation opening operation: When the circuit breaker switch is in the open state, control the isolation drive motor 3-1 of the isolating switch drive mechanism 3 to reverse, driving the insulating screw 2-24 to rotate. Rotating the lead screw 2-24 causes the three-position moving contact 2-22 to move to the left, separating from the incoming terminal 2-21. This causes the disconnecting switch 2-2 to open, completing the power outage. Closing operation: When the disconnecting switch is closed, the operating mechanism 4 of the vacuum circuit breaker is activated. Through the transmission crank arm 6, the insulating pull rod 2-6 moves upward, causing the moving contact (not shown) inside the vacuum interrupter 2-3 to move upward and contact the stationary contact 2-7. This closes the circuit breaker switch 2-3. At this time, current flows from the incoming terminal 2-21 through the three-position moving contact 2-22, the isolating conductive element 2-23, the vacuum interrupter 2-3, and the outgoing terminal 2-5, completing the power supply operation.

[0023] Opening operation: When the equipment needs to be opened and de-energized, first control the operation mechanism 4 of the vacuum circuit breaker to move, drive the insulating pull rod 2-6 to move downward, the moving contact in the vacuum interrupter 2-3 separates from the stationary contact 2-7, the circuit breaker switch 2-3 opens, and the current is cut off; if an isolation opening operation is required, control the isolation drive motor 3-1 of the isolation switch drive mechanism 3 to reverse, drive the insulating screw 2-24 to rotate, drive the three-position moving contact 2-22 to move to the left, separate from the incoming line 2-21, the isolation switch 2-2 opens, and the opening and de-energization are completed.

[0024] Grounding operation: When the equipment is tripped and the isolating switch 2-2 is in the tripped state, the grounding drive motor 5-1 of the grounding switch drive mechanism 5 rotates forward, driving the driven gear 5-6 to rotate through the driving gear 5-5, which in turn drives the worm 5-2 to rotate. The worm 5-2 meshes with the worm wheel 5-7, driving the grounding main shaft 5-3 to rotate. The crank arm 5-8 on the grounding main shaft 5-3 pulls the grounding spring 5-10 to extend. At the same time, the grounding knife switch 5-4 rotates with the grounding main shaft 5-3 until the contact plate at the left end of the grounding contact 2-4 is inserted between the two grounding knife plates. Under the pulling force of the grounding spring 5-10 and the elastic force of the spring on the grounding knife plate, the grounding knife plate and the contact plate are in close contact, completing the grounding operation.

[0025] Grounding release operation: Control the grounding drive motor 5-1 to reverse, drive the grounding main shaft 5-3 to rotate in the opposite direction, the grounding switch 5-4 leaves the grounding contact 2-4, the grounding spring 5-10 resets, and the grounding release is completed.

[0026] The above procedures for operating circuit breaker 2-3, disconnector 2-2, and grounding switch have a complete five-prevention operating sequence and requirements.

[0027] This technical solution, through the design of the three-position circuit breaker combination electrical appliance for mining high-explosive cabinets, perfectly integrates the circuit breaker with the disconnecting switch and grounding switch, achieving a high degree of integration. With the addition of an intelligent controller, it makes the construction of intelligent and visualized mines easier and more reliable.

[0028] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0029] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A three-position circuit breaker combination electrical appliance for mining high-explosive cabinets, characterized in that: The system includes a three-position solid-sealed pole (2) located inside the high-explosive cabinet and integrated on a mounting bracket (7) fixed to the chassis vehicle (1), a disconnector drive mechanism (3), a vacuum circuit breaker operating mechanism (4), and a grounding switch drive mechanism (5). The three-position solid-sealed pole (2) includes a pole body (2-1) integrally molded with epoxy resin, a disconnector (2-2) insulated and solidified in the inner cavity of the pole body (2-1), a vacuum interrupter (2-3), an outgoing terminal (2-5), and an insulating pull rod (2-6). The middle part of the disconnector (2-2) is connected to the upper end of the vacuum interrupter (2-3), and the lower end of the vacuum interrupter (2-3) adapted to and connected to the outgoing terminal (2-5) is connected to the upper end of the insulating pull rod (2-6). -2) The left end is connected to the disconnecting switch drive mechanism (3), and under the drive of the disconnecting switch drive mechanism (3), the action end of the disconnecting switch (2-2) is connected or disconnected from the inlet end (2-21) sealed on the right side of the upper end of the pole body (2-1). The vacuum circuit breaker operating mechanism (4) is connected to the lower end of the insulating rod (2-6) by rotating the transmission crank arm (6) set on the mounting bracket (7). When the vacuum circuit breaker operating mechanism (4) drives the transmission crank arm (6) to drive the lower end of the insulating rod (2-6) to rise and fall, the on and off control of the vacuum interrupter (2-3) is realized. The grounding contact (2-4) is fixed on the side wall of the outlet end (2-5), and the grounding on and off state of the grounding contact (2-4) is controlled by the grounding switch drive mechanism (5).

2. The three-position circuit breaker combination electrical appliance for mining high-explosive cabinets according to claim 1, characterized in that: The disconnecting switch (2-2) includes a three-position moving contact (2-22), an inlet terminal (2-21), an isolation conductive element (2-23), and an insulating screw (2-24). The inner cavities at the upper and lower ends of the pole body (2-1) are interconnected and form a T-shape. The isolation conductive element (2-23) located in the upper inner cavity of the pole body (2-1) is installed and fixedly sealed at the position where the lower inner cavity of the pole body (2-1) communicates with the upper inner cavity. The insulating sleeve (2-25) on the right side of the isolation conductive element (2-23) is insulated and fixedly sealed in the upper inner cavity of the pole body (2-1). The insulating sleeve (2-25) has two ends respectively connected to the guide installed inside. The three-position moving contact (2-22) adapted to the isolation conductive element (2-23) and the inlet terminal (2-21) is located in the inner cavity of the upper end of the pole body (2-1). The right end of the insulating screw (2-24) passing through the isolation conductive element (2-23) is threadedly connected to the T-shaped sleeve (2-26) fixed in the insulating sleeve (2-25). The disconnecting switch driving mechanism (3) is connected to the left end of the insulating screw (2-24). When the disconnecting switch driving mechanism (3) drives the insulating screw (2-24) to rotate forward and reverse to control the three-position moving contact (2-22) to move to the right or left, the on / off control of the isolation conductive element (2-23) and the inlet terminal (2-21) is realized.

3. The three-position circuit breaker combination electrical appliance for mining high-explosive cabinets according to claim 2, characterized in that: The disconnector drive mechanism (3) includes an disconnector drive motor (3-1) and a driven gear (3-2). The disconnector drive motor (3-1) is mounted on the upper end of the mounting frame (7). The left end of the insulating screw (2-24) extends out of the pole body (2-1) and is rotatably supported in the mounting frame (7). The driven gear (3-2) fixed at the left end of the insulating screw (2-24) meshes with the driving gear fixed on the output shaft of the disconnector drive motor (3-1), and the disconnector drive motor (3-1) drives the insulating screw (2-24) to rotate clockwise or counterclockwise.

4. The three-position circuit breaker combination electrical appliance for mining high-explosive cabinets according to claim 1, characterized in that: The vacuum interrupter (2-3), the outlet end (2-5), and the insulating pull rod (2-6) are distributed vertically and insulatedly fixed in the inner cavity of the lower end of the pole body (2-1). The outlet end (2-5) is located at the opening position in the middle of the inner cavity of the lower end of the pole body (2-1). One end of the grounding contact (2-4) is fixed to the left side wall of the outlet end (2-5) by bolts.

5. The three-position circuit breaker combination electrical appliance for mining high-explosive cabinets according to claim 1, characterized in that: The grounding switch drive mechanism (5) includes a grounding drive motor (5-1), a worm gear (5-2), a grounding main shaft (5-3), and a grounding switch (5-4). The grounding drive motor (5-1) is mounted on the mounting frame (7) via a support frame (8), and the driving gear (5-5) driven by the grounding drive motor (5-1) meshes with the driven gear (5-6) fixed on the worm gear (5-2). The worm gear (5-2) and the grounding main shaft (5-3) are vertically distributed and rotatably supported on the mounting frame (7), and the worm gear (5-2) meshes with the worm wheel (5-7) mounted on the grounding main shaft (5-3). A crank arm (5-8) and a grounding switch (5-4) are fixed on the grounding main shaft (5-3). 5-4), the outer end of the crank arm (5-8) is rotatably connected to the upper end of the grounding spring (5-10) hinged to the mounting bracket (7) at the lower end. The outer end of the grounding switch (5-4) consists of two spaced grounding blades. The slotted pin (5-9) passes through the long slot on the two grounding blades and the pad between the two grounding blades and is adapted to the snap ring. The outer wall of the grounding blade and the snap ring on the same side are provided with a spring fitted on the slotted pin (5-9). When the grounding drive motor (5-1) drives the grounding main shaft (5-3) to rotate the grounding switch (5-4) until the left end contact plate of the grounding contact (2-4) is inserted between the two grounding blades, the grounding switch (5-4) and the grounding contact (2-4) are in contact and closed.

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