Mining explosion-proof combination switch

Abstract

The invention relates to the technical field of power distribution cabinets, and discloses a mining explosion-proof combination switch which comprises a first shell and a second shell, and supporting legs are arranged at the bottom of the mining explosion-proof combination switch. The first shell is provided with a first side seat, the second shell is provided with a second side seat, the first side seat is provided with a mounting groove, the second side seat is provided with a mounting block capable of sliding into the mounting groove, and a matching surface is provided with a rubber layer. A first sealing plate is arranged at the bottom of the second shell, and a contact plate is arranged at the bottom of the first shell. Mounting bases are arranged on the two sides of the second shell, the two ends of the mounting shaft are connected with the mounting bases, and the second sealing plate is hinged to the mounting shaft and can tightly press the first side bases. According to the structure, rapid assembly is achieved through sliding insertion, the rubber layer provides pressure self-compensation sealing, and the problem of sealing failure in the vibration environment is effectively solved.

Description

Technical Field

[0001] This invention relates to the field of power distribution cabinet technology, and in particular to a mine explosion-proof combination switch. Background Technology

[0002] Mining explosion-proof combination switches are electrical equipment control devices specifically designed and manufactured for the harsh and hazardous environments of mines. During mining operations, underground spaces are confined, containing large amounts of flammable and explosive gases such as methane and coal dust. Simultaneously, the environment is humid, corrosive, and subject to frequent mechanical vibrations, making it impossible for ordinary electrical equipment to operate safely and stably. Mining explosion-proof combination switches were developed to address this need. Structurally, mining explosion-proof combination switches are based on a high-strength, highly sealed explosion-proof housing, integrating various electrical components such as circuit breakers, contactors, relays, and fuses. These components work together to achieve the functions of circuit control, protection, and monitoring. The explosion-proof housing is typically made of special alloy steel or other high-strength materials, combined with a precision-machined sealing structure, capable of withstanding potential internal explosion pressures and preventing the propagation of explosion flames and high temperatures to the outside, thus preventing larger-scale explosions or fires.

[0003] In existing technologies, explosion-proof switches for mining applications are often composed of multiple housings. Firstly, mine electrical systems are complex, requiring the integration of various control and protection modules. A modular housing design facilitates functional zoning, avoids excessive component density within a single housing, simplifies later inspection and maintenance, and improves heat dissipation. In practical applications, the connections between explosion-proof switch housings often use ordinary rubber sealing rings and bolts for fastening. The sealing effect depends on the tightness of the bolts. In the complex vibration environment of mines, long-term vibration can easily cause bolts to loosen, leading to seal failure.

[0004] Therefore, it is necessary to provide a new explosion-proof combination switch for mining to solve the above-mentioned technical problems. Summary of the Invention

[0005] The technical problem this invention aims to solve is the core issue that traditional bolted connections in mine explosion-proof switches are prone to loosening and sealing failure under severe vibration environments, thus posing a potential explosion-proof safety hazard.

[0006] To solve the above-mentioned technical problems, the present invention provides a mine explosion-proof combination switch, including a first housing, a second housing, a first support leg and a second support leg, the first support leg being connected to the bottom of the first housing and the second support leg being connected to the bottom of the second housing, and also including a first side seat, a second side seat, a mounting block, a first sealing plate, a second sealing plate, a contact plate, a mounting base and a mounting shaft; The first housing and the second housing are spaced apart along a third direction. The first side seat is fixedly connected to the side of the first housing near the second housing, and the second side seat is fixedly connected to the side of the second housing near the first housing. The first side seat is provided with an installation groove along a first direction. The installation block is fixedly connected to the second side seat and is slidably connected to the corresponding installation groove. The installation groove is a dovetail groove. The installation block and the installation groove cooperate. The mating surfaces of the installation block and the installation groove are respectively provided with rubber layers. The first sealing plate is fixedly connected to one side of the bottom of the second housing, the contact plate is fixedly connected to one side of the bottom of the first housing, and the contact plate and the first sealing plate can fit together when the mounting block is slidably connected to the mounting groove. Two mounting seats are spaced apart and connected to both sides of the second housing along the second direction. The two ends of the mounting shaft are rotatably connected to the two mounting seats respectively. The second sealing plate is rotatably connected to the mounting shaft and can abut against the top of the first side seat. Among them, the first direction, the second direction, and the third direction are perpendicular to each other.

[0007] Preferably, the first side seat includes two first side plates spaced apart along the second direction, and the second side seat includes two second side plates spaced apart along the second direction. Each first side plate is fixedly connected to the first housing, and each second side plate is fixedly connected to the second housing. The two mounting seats are respectively connected to the corresponding second side plate and to the side away from the other second side plate.

[0008] Preferably, the mining explosion-proof combination switch further includes a first connecting block and a second connecting block. The first connecting block is fixedly connected to the first side seat, and the second connecting block is fixedly connected to the second sealing plate. When the second sealing plate abuts against the first side seat, the first connecting block can be connected to the second connecting block by bolts.

[0009] Preferably, there are two first connecting blocks and two second connecting blocks. The two first connecting blocks are spaced apart on the first side seat along the second direction. Each first connecting block is fixedly connected to the side of the corresponding first side plate away from the other first side plate. The two second connecting blocks are spaced apart on both sides of the second sealing plate along the second direction.

[0010] Preferably, the mine explosion-proof combination switch further includes a ratchet, a lever, and a spring. There are two ratchets, two levers, and two springs. The two ratchets are rotatably connected to both sides of the mounting shaft and are located on the side of each second side plate away from the other second side plate. Each lever is rotatably connected to the corresponding mounting base, and one end of each lever can engage with the corresponding ratchet. One end of each spring is fixedly connected to the corresponding mounting base, and the other end of each spring abuts against the corresponding lever.

[0011] Preferably, the mine explosion-proof combination switch also includes two side rods, which are spaced apart along the second direction. Each side rod is installed on a corresponding mounting base, and one end of each spring is fixedly connected to the corresponding side rod to be fixedly connected to the corresponding mounting base.

[0012] Preferably, the mine explosion-proof combination switch further includes a fixed shaft, and the lever includes a contact block, a mounting ring and a pressing block. The contact block and the pressing block are provided with an included angle and are both fixedly connected to the mounting ring. There are two fixed shafts, each fixed shaft is fixedly connected to the corresponding mounting seat, and each mounting ring is rotatably connected to the corresponding fixed shaft so as to be rotatably connected to the mounting seat.

[0013] Preferably, the explosion-proof combination switch for mining also includes a mounting bracket and a heat dissipation assembly. The mounting bracket is fixedly connected to the first housing. The heat dissipation assembly includes a heat-conducting plate, heat dissipation fins, a water-cooling plate, an inlet pipe, and an outlet pipe. The heat-conducting plate is fixedly connected to the mounting bracket. Multiple heat dissipation fins are spaced apart along a second direction and fixedly connected to the heat-conducting plate. The water-cooling plate is fixedly connected to the side of the heat dissipation fins away from the heat-conducting plate. The interior of the water-cooling plate is provided with a cavity for coolant flow. The water-cooling plate is provided with an inlet and an outlet, which are connected to the cavity. The inlet pipe is connected to the inlet and to the water-cooling plate, and the outlet pipe is connected to the outlet and to the water-cooling plate.

[0014] Preferably, a plurality of spaced needle columns are fixedly connected inside the water-cooled plate.

[0015] Preferably, the mine explosion-proof combination switch further includes a side support, a limit seat, a fan connecting frame, a guide rail, a cooling fan, a rack, a support frame, a cooling water pipe, a motor, and a gear. The side support is fixedly connected to the first housing. Two limit seats are spaced apart on the side support along a second direction. The guide rail is located between the two limit seats, and its two ends are fixedly connected to the two limit seats respectively. The fan connecting frame is slidably connected to the guide rail. The support frame is fixedly connected to the side support. The cooling water pipe is fixedly connected to the support frame. The inlet end of the cooling water pipe is connected to an external water pump, and the outlet end of the cooling water pipe is connected to an outlet pipe. The cooling fan is fixedly connected to the fan connecting frame, and its outlet is used to blow air onto the cooling water pipe. The side support has a through groove along a third direction. The rack is connected to the bottom of the fan connecting frame and slidably connected in the through groove. The motor is fixedly connected to the side support. The output shaft of the motor is connected to a gear, and the gear meshes with the rack to drive the cooling fan to slide; and / or Both the first and second housings are made of alloy tool steel.

[0016] Compared with the prior art, the beneficial effects of the explosion-proof combination switch for mining according to the embodiments of the present invention are as follows: (1) The sliding fit structure of the mounting block and mounting groove guides the first and second housings to close, ensuring that the bottom first sealing plate and the contact plate can be accurately aligned and tightly fitted. The rubber layer on the mating surface not only enhances the initial sealing effect, but also uses its elastic properties to compensate for the small displacement caused by vibration or internal pressure fluctuations, realizing dynamic sealing and pressure self-compensation, fundamentally solving the industry pain point of traditional pure bolt connections being prone to loosening and connection failure under long-term severe vibration in mines.

[0017] (2) The sliding connection design of the mounting block and the mounting groove along the first direction provides precise guidance and limitation for the closing process of the two shells, avoiding misalignment problems during assembly and significantly improving assembly efficiency and ease of operation. At the same time, the mating structure forms effective constraints in three vertical directions, greatly enhancing the rigidity and stability of the overall structure after assembly, and making it more resistant to external vibration and impact.

[0018] (3) The assembly of the first and second shells does not require alignment and tightening of a large number of bolts. The installation and fixing of the main sealing structure can be completed by sliding insertion and rotation pressing, which greatly reduces the labor intensity of operators and shortens the installation and maintenance time. It is especially suitable for underground mining operations in narrow spaces and harsh environments.

[0019] (4) The mounting groove and mounting block mating surface rubber layer, the first sealing plate and the contact plate mating surface, and the second sealing plate together form a multi-layer sealing barrier. The redundant sealing greatly reduces the risk of failure of a single sealing surface, significantly improves the explosion-proof safety level, and ensures that in flammable and explosive mining environments, external harmful gases cannot enter and internal fault sparks cannot escape, resulting in high safety. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of an embodiment of the present invention; Figure 2 yes Figure 1 Enlarged view of a portion at point A; Figure 3 yes Figure 1 A magnified view of section B; Figure 4 This is a first-view schematic diagram of the first shell; Figure 5 This is a second-view schematic diagram of the first shell; Figure 6 yes Figure 5 A magnified view of a portion at point C; Figure 7 This is a partial sectional view of the water-cooled plate; Figure 8 This is a third-view schematic diagram of the first shell.

[0021] In the diagram, 1 is the first housing; 2 is the second housing; 3 is the first supporting leg; and 4 is the second supporting leg. 5. First side seat; 51. First side plate; 6. Second side seat; 61. Second side plate; 7. Mounting block; 8. First sealing plate; 9. Second sealing plate; 10. Contact plate; 11. Mounting base; 12. Mounting shaft; 13. Mounting groove; 14. First connecting block; 15. Second connecting block; 16. Ratchet; 17. Lever; 171. Contact block; 172. Mounting ring; 173. Pressing block; 18. Spring clip; 19. Fixed shaft; 20. Side rod; 21. Heat dissipation components; 211. Heat conduction plate; 212. Heat dissipation fins; 213. Water-cooled plate; 2131. Cavity; 2132. Needle column; 214. Inlet pipe; 215. Outlet pipe; 22. Mounting bracket; 23. Side support; 231. Through groove; 24. Limit seat; 25. Fan connecting bracket; 26. Guide rail; 27. Cooling fan; 28. Rack; 29. ​​Support frame; 30. Cooling water pipe; 31. Motor; 32. Gear. Detailed Implementation

[0022] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0023] In the description of this invention, it should be understood that the terms "longitudinal," "lateral," "first," "horizontal," "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," and "outer," etc., used to indicate orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this invention and simplifying the description, and are not intended to 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 this invention.

[0024] In the description of the invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0025] like Figures 1-8 As shown, a preferred embodiment of the present invention provides a mine explosion-proof combination switch, including a first housing 1, a second housing 2, a first support leg 3 and a second support leg 4. The first support leg 3 is connected to the bottom of the first housing 1, and the second support leg 4 is connected to the bottom of the second housing 2. It also includes a first side seat 5, a second side seat 6, a mounting block 7, a first sealing plate 8, a second sealing plate 9, a contact plate 10, a mounting base 11 and a mounting shaft 12. The first housing 1 and the second housing 2 are spaced apart along a third direction. The first side seat 5 is fixedly connected to the side of the first housing 1 near the second housing 2, and the second side seat 6 is fixedly connected to the side of the second housing 2 near the first housing 1. The first side seat 5 is provided with a mounting groove 13 along a first direction. The mounting block 7 is fixedly connected to the second side seat 6 and is slidably connected to the corresponding mounting groove 13. The mounting groove 13 is a dovetail groove. The mounting block 7 cooperates with the mounting groove 13. The mating surfaces of the mounting block 7 and the mounting groove 13 are respectively provided with rubber layers. The first sealing plate 8 is fixedly connected to the bottom side of the second housing 2, the contact plate 10 is fixedly connected to the bottom side of the first housing 1, and the contact plate 10 and the first sealing plate 8 can fit together when the mounting block 7 is slidably connected to the mounting groove 13. Two mounting seats 11 are spaced apart and connected to both sides of the second housing 2 along the second direction. The two ends of the mounting shaft 12 are rotatably connected to the two mounting seats 11 respectively. The second sealing plate 9 is rotatably connected to the mounting shaft 12 and can abut against the top of the first side seat 5. Among them, the first direction, the second direction, and the third direction are perpendicular to each other.

[0026] Based on the above technical solution, the working process of the present invention is as follows: The first housing 1 and the second housing 2 are placed at a distance along a third direction, aligning the first side seat 5 on the first housing 1 with the second side seat 6 on the second housing 2. The second housing 2 is slid along a first direction, causing the mounting block 7 on it to slide into the mounting groove 13 of the first side seat 5. During the sliding process, the rubber layer on the mating surface of the mounting block 7 and the mounting groove 13 begins to elastically deform and fit tightly together. When the mounting block 7 is fully inserted, the first sealing plate 8 at the bottom of the second housing 2 also fits tightly with the contact plate 10 at the bottom of the first housing 1. After the mounting block 7 is in place, the second sealing plate 9 is manually rotated and flipped downwards. When the second sealing plate 9 completely covers the top of the first side seat 5, the second sealing plate 9, the top of the first side seat 5, and the mating surface of the mounting block 7 and the mounting groove 13 together constitute a complete connection structure between the first housing 1 and the second housing 3, sealed by a rubber layer.

[0027] Based on the above scheme, this scheme guides the first housing 1 and the second housing 2 to close through the sliding fit structure of the mounting block 7 and the mounting groove 13, ensuring that the bottom first sealing plate 8 and the contact plate 10 can be accurately aligned and tightly fitted. The rubber layer set on the mating surface not only enhances the initial sealing effect, but also uses its elastic properties to compensate for the small displacement caused by vibration or internal pressure fluctuations, realizing dynamic sealing and pressure self-compensation, fundamentally solving the problem of loosening and connection failure of traditional pure bolt connections under long-term severe vibration in mines. The sliding connection design of the mounting block 7 and the mounting groove 13 along the first direction provides precise guidance and limitation for the closing process of the first housing 1 and the second housing 2, avoiding misalignment problems during assembly and significantly improving assembly efficiency and ease of operation. At the same time, this mating structure forms effective constraints in three vertical directions, greatly enhancing the rigidity and stability of the overall structure after assembly, and making it more resistant to external vibration and impact. The assembly of the first housing 1 and the second housing 2 does not require individual alignment and tightening of numerous bolts. The main sealing structure can be installed and fixed simply through sliding insertion and rotational pressing, significantly reducing the labor intensity of operators and shortening installation and maintenance time. This is particularly suitable for the confined spaces and harsh environments of underground mining operations. The mounting groove 13 and the rubber layer of the mounting block 7 mating surfaces, the contact surfaces of the first sealing plate 8 and the contact plate 10, and the second sealing plate 9 together form a multi-layered sealing barrier. This redundant sealing greatly reduces the risk of failure of a single sealing surface, significantly improving the explosion-proof safety level and ensuring that in flammable and explosive mining environments, external harmful gases cannot penetrate and internal fault sparks cannot escape, resulting in high safety.

[0028] Furthermore, the first side seat 5 includes two first side plates 51 spaced apart along the second direction, and the second side seat 6 includes two second side plates 61 spaced apart along the second direction. Each first side plate 51 is fixedly connected to the first housing 1, and each second side plate 61 is fixedly connected to the second housing 2. Two mounting seats 11 are respectively connected to the corresponding second side plate 61 and to the side away from the other second side plate 61. The double side plates achieve a symmetrical force flow path. The explosion pressure is transmitted to the two second side plates 61 or the first side plates 51 through the mounting block 7, and then evenly distributed to the entire second housing 2 or the first housing 1. This symmetry avoids unilateral overload, makes the sealing force distribution more uniform, and improves the overall pressure resistance. By setting two spaced first side plates 51 and second side plates 61, the local deformation of the first housing 1 and the second housing 2 can be effectively resisted, maintaining the accuracy of the mounting groove 13. Even if the first housing 1 and the second housing 2 are slightly twisted as a whole, the double-side plate structure can ensure the sliding fit between the mounting block 7 and the mounting groove 13 through its own rigid deformation area, thereby ensuring reliable start-up and operation under various working conditions and greatly improving the adaptability of this innovative solution.

[0029] Furthermore, the mine-use explosion-proof combination switch also includes a first connecting block 14 and a second connecting block 15. The first connecting block 14 is fixedly connected to the first side seat 5, and the second connecting block 15 is fixedly connected to the second sealing plate 9. When the second sealing plate 9 abuts against the first side seat 5, the first connecting block 14 can be connected to the second connecting block 15 by bolts. The bolt connection method allows the operator to apply a controllable and sufficient preload, ensuring a stable and uniform pressing contact between the second sealing plate 9 and the upper surface of the first side seat 5. The mechanical forced pressing effectively compensates for possible creep or slight wear of the sealing material, avoiding insufficient sealing pressure that may result from relying solely on gravity or the weight of the mechanism, thereby significantly improving the long-term reliability and durability of the top seal. In a vibration environment, simple overlapping or pressing may cause slight displacement. By fastening the connecting blocks fixed to the first side seat 5 and the second sealing plate 9 respectively by bolts, a positive mechanical interlocking relationship is established between the first housing 1 and the second housing 2. The rigid connection can effectively resist vibration and impact in all directions, prevent relative displacement or jumping between the second sealing plate 9 and the mounting shaft 12, and ensure the absolute stability of the top seal under extreme working conditions.

[0030] Furthermore, there are two first connecting blocks 14 and two second connecting blocks 15. The two first connecting blocks 14 are spaced apart along the second direction on the first side seat 5, and each first connecting block 14 is fixedly connected to the side of the corresponding first side plate 51 away from the other first side plate 51. The two second connecting blocks 15 are spaced apart along the second direction on both sides of the second sealing plate 9. By spaced the two first connecting blocks 14 along the second direction on the first side seat 5 and correspondingly place the two second connecting blocks 15 on both sides of the second sealing plate 9, and finally connect them with bolts, a symmetrical fastening force system is formed. This ensures that when the second sealing plate 9 is pressed, the pressing force on the upper surface of the first side seat 5 is evenly distributed in the second direction, eliminating the potential for warping of the sealing plate, excessive local stress, or poor sealing caused by single-point or asymmetrical pressing, thus improving the reliability of the top sealing of the first housing 1 and the second housing 2.

[0031] Furthermore, the mine explosion-proof combination switch also includes ratchet 16, lever 17, and spring 18. There are two ratchet 16s, two levers 17, and two springs 18. The two ratchet 16s are rotatably connected to both sides of the mounting shaft 12, and are located on the side of each second side plate 61 furthest from the other second side plate 61. Each lever 17 is rotatably connected to its corresponding mounting base 11, with one end engaging with the corresponding ratchet 16. One end of each spring 18 is fixedly connected to its corresponding mounting base 11, and the other end of each spring 18 abuts against its corresponding lever 17. By setting the ratchet 16 that rotates with the mounting shaft 12 and the lever 17 that engages with it, the inherent unidirectional motion characteristic of the ratchet 16 allows the mounting shaft 12 to smoothly press down the second sealing plate 9, while preventing reverse rotation and loosening. This eliminates the possibility of weakening of the sealing clamping force due to continuous and severe vibrations in the mine, thus improving sealing reliability. One end of the spring 18 is fixed to the mounting base 11, and the other end elastically abuts against the lever 17, providing the lever 17 with a continuous elastic preload pointing in the direction of meshing with the ratchet 16, ensuring that the meshing between the lever 17 and the ratchet 16 is always tight and reliable, eliminating the shaking or abnormal noise that may be caused by mechanism clearance or slight deformation, and making the locking state stable.

[0032] Furthermore, the mine explosion-proof combination switch also includes two side rods 20, which are spaced apart along the second direction. Each side rod 20 is mounted on a corresponding mounting base 11, and one end of each spring piece 18 is fixedly connected to the corresponding side rod 20 to the corresponding mounting base 11. This simplifies the installation method of the spring pieces 18 and improves assembly efficiency and positional accuracy. The side rods 20 serve as independent mounting references, providing stable and secure fixing points for the spring pieces 18, ensuring accurate preload direction and stable operation, effectively guaranteeing that the lever 17 always reliably presses against the tooth groove of the ratchet 16, preventing tooth dislodgement due to vibration. The two side rods 20, spaced apart along the second direction, match the symmetrical locking mechanism on both sides, ensuring balanced force on the spring pieces 18 and improving the synchronization and reliability of the overall mechanism's operation.

[0033] Furthermore, the mine explosion-proof combination switch also includes a fixed shaft 19. The lever 17 includes a contact block 171, a mounting ring 172, and a pressing block 173. An included angle is provided between the contact block 171 and the pressing block 173, and both are fixedly connected to the mounting ring 172. There are two fixed shafts 19, each fixedly connected to a corresponding mounting base 11. Each mounting ring 172 is rotatably connected to its corresponding fixed shaft 19 and thus rotatably connected to the mounting base 11. This achieves structural integration and standardized installation of the lever 17, improving the rigidity and assembly precision of the components. The angle design between the contact block 171 and the pressing block 173 optimizes the force transmission path, making the operating force more ergonomic, and the pressing and unlocking action is light and responsive. The fixed shaft 19, as an independent support component, ensures that the lever 17 rotates flexibly and is accurately positioned, effectively preventing jamming caused by loose hinges or wear, and significantly improving the working reliability and service life of the locking ratchet 16 under long-term vibration environments.

[0034] Furthermore, the mining explosion-proof combination switch also includes a mounting bracket and a heat dissipation assembly 21. The mounting bracket is fixedly connected to the first housing 1. The heat dissipation assembly 21 includes a heat-conducting plate 211, heat dissipation fins 212, a water-cooling plate 213, a water inlet pipe 214, and a water outlet pipe 215. The heat-conducting plate 211 is fixedly connected to the mounting bracket. Multiple heat dissipation fins 212 are spaced apart along the second direction and fixedly connected to the heat-conducting plate 211. The water-cooling plate 213 is fixedly connected to the side of the heat dissipation fins 212 away from the heat-conducting plate 211. The interior of the water-cooling plate 213 is provided with a cavity 2131 for coolant flow. The water-cooling plate 213 is provided with a water inlet and a water outlet. The water inlet and the water outlet are connected to the cavity 2131. The water inlet pipe 214 is connected to the water inlet and to the water-cooling plate 213. The water outlet pipe 215 is connected to the water outlet and to the water-cooling plate 213.

[0035] This system achieves rapid heat dissipation and multi-stage efficient heat dissipation from electrical components. Heat is conducted to the heat dissipation fins 212 via the heat-conducting plate 211, achieving air convection heat dissipation by increasing the surface area. Simultaneously, coolant flows through the internal channels of the water-cooled plate 213, utilizing the high specific heat capacity of the liquid for forced cooling, significantly improving heat dissipation efficiency. The inlet pipe 214 and outlet pipe 215 are connected to the inlet and outlet of the water-cooled plate 213, respectively, ensuring smooth coolant circulation. This combined air-cooling and water-cooling composite heat dissipation method effectively solves the temperature rise problem under high-power operation of mine explosion-proof switches, ensuring long-term stable and safe operation of the equipment.

[0036] Furthermore, multiple spaced-apart pin columns 2132 are fixedly connected inside the water-cooled plate 213. The pin columns 2132 increase the turbulence effect of the coolant flow channel, enhancing the turbulence of the coolant and effectively improving the heat exchange efficiency between the water-cooled plate 213 and the coolant. Simultaneously, the pin columns 2132 serve as a support structure, strengthening the mechanical strength of the water-cooled plate 213 cavity 2131 and preventing deformation caused by liquid flow impact or external pressure. This design significantly improves heat dissipation performance without increasing volume, ensuring the thermal stability of the equipment under high load conditions.

[0037] Furthermore, the mine explosion-proof combination switch also includes a side support 23, a limit seat 24, a fan connecting frame 25, a guide rail 26, a cooling fan 27, a rack 28, a support frame 29, a cooling water pipe 30, a motor 31, and a gear 32. The side support 23 is fixedly connected to the first housing 1. Two limit seats 24 are spaced apart on the side support 23 along the second direction. The guide rail 26 is located between the two limit seats 24 and its two ends are fixedly connected to the two limit seats 24 respectively. The fan connecting frame 25 is slidably connected to the guide rail 26. The support frame 29 is fixedly connected to the side support 23. The cooling water pipe 30... The cooling water pipe 30 is fixedly connected to the support frame 29. The inlet end of the cooling water pipe 30 is connected to an external water pump, and the outlet end of the cooling water pipe 30 is connected to the outlet pipe 215. The cooling fan 27 is fixedly connected to the fan connecting frame 25, and its air outlet is used to blow air onto the cooling water pipe 30. The side support 23 has a through groove 231 along a third direction. The rack 28 is connected to the bottom of the fan connecting frame 25 and is slidably connected in the through groove 231. The motor 31 is fixedly connected to the side support 23. The output shaft of the motor 31 is connected to the gear 32. The gear 32 meshes with the rack 28 to drive the cooling fan 27 to slide. Both the first housing 1 and the second housing 2 are made of alloy tool steel.

[0038] Driven by the motor 31, the cooling fan 27 slides back and forth along the guide rail 26, its exhaust port continuously sweeping across the surface of the cooling water pipe 30, significantly enhancing the uniformity and turbulence of airflow and effectively improving air-cooling efficiency. This dynamic cooling method avoids the problems of concentrated airflow and uneven heat dissipation caused by a fixed fan, ensuring that the entire length of the cooling water pipe 30 is fully cooled, thereby improving the heat exchange effect of the circulating coolant and forming a highly efficient and coordinated heat dissipation cycle.

[0039] The first housing 1 and the second housing 2 are made of alloy tool steel, which has high strength, high hardness, and excellent impact resistance. This effectively resists mechanical damage under complex underground working conditions and ensures that the housing does not deform or crack under internal explosion pressure, fully meeting the stringent requirements for structural strength and intrinsic safety of mining explosion-proof equipment. In this embodiment, the first housing 1 and the second housing 2 are made of Cr12MoV alloy tool steel, which reaches a hardness of approximately HRC60 after heat treatment. This allows them to withstand explosion impact pressure and possesses excellent wear resistance and corrosion resistance, adapting to the harsh, humid, and dusty environment of mines. The cooling fan 27 and the shifting motor 31 are both explosion-proof motors 31, and their electrical components are encapsulated or explosion-proof to eliminate the risk of electrical spark leakage, meeting mine explosion-proof safety standards and ensuring reliable operation of the equipment in flammable and explosive environments. In summary, this invention provides a mine-use explosion-proof combination switch. The sliding fit structure of the mounting block 7 and the mounting groove 13 guides the first housing 1 and the second housing 2 to close, ensuring precise alignment and tight contact between the bottom first sealing plate 8 and the contact plate 10. The rubber layer on the mating surface not only enhances the initial sealing effect but also compensates for minor displacements caused by vibration or internal pressure fluctuations using its elastic properties, achieving dynamic sealing and pressure self-compensation. This fundamentally solves the industry pain point of traditional pure bolt connections being prone to loosening and connection failure under long-term severe vibration in mines. The sliding connection design of the mounting block 7 and the mounting groove 13 along the first direction provides precise guidance and limitation for the closing process of the two housings, avoiding misalignment during assembly and significantly improving assembly efficiency and ease of operation. Simultaneously, this mating structure forms effective constraints in three vertical directions, greatly enhancing the rigidity and stability of the overall structure after assembly, and providing stronger resistance to external vibration and impact. The assembly of the first housing 1 and the second housing 2 does not require individual alignment and tightening of numerous bolts. The main sealing structure can be installed and fixed simply through sliding insertion and rotational pressing, significantly reducing the labor intensity of operators and shortening installation and maintenance time. This is particularly suitable for the confined spaces and harsh environments of underground mining operations. The mounting groove 13 and the rubber layer of the mounting block 7 mating surfaces, the contact surfaces of the first sealing plate 8 and the contact plate 10, and the second sealing plate 9 together form a multi-layered sealing barrier. This redundant sealing design greatly reduces the risk of failure of a single sealing surface, significantly improving the explosion-proof safety level and ensuring that in flammable and explosive mining environments, external harmful gases cannot penetrate and internal fault sparks cannot escape, resulting in high safety.

[0040] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A mine explosion-proof combination switch, comprising a first housing, a second housing, a first support leg, and a second support leg, wherein the first support leg is connected to the bottom of the first housing, and the second support leg is connected to the bottom of the second housing, characterized in that, It also includes a first side seat, a second side seat, a mounting block, a first sealing plate, a second sealing plate, a contact plate, a mounting base, and a mounting shaft; The first housing and the second housing are spaced apart along a third direction. The first side seat is fixedly connected to the side of the first housing near the second housing, and the second side seat is fixedly connected to the side of the second housing near the first housing. The first side seat has an installation groove along a first direction. The installation block is fixedly connected to the second side seat and is slidably connected to the corresponding installation groove. The installation groove is a dovetail groove. The installation block cooperates with the installation groove. The mating surfaces of the installation block and the installation groove are respectively provided with rubber layers. The first sealing plate is fixedly connected to one side of the bottom of the second housing, the contact plate is fixedly connected to one side of the bottom of the first housing, and when the mounting block is slidably connected to the mounting groove, the contact plate and the first sealing plate can fit together. Two mounting seats are spaced apart and connected to both sides of the second housing along the second direction. The two ends of the mounting shaft are rotatably connected to the two mounting seats respectively. The second sealing plate is rotatably connected to the mounting shaft and can abut against the top of the first side seat. Among them, the first direction, the second direction, and the third direction are perpendicular to each other.

2. The explosion-proof combination switch for mining as described in claim 1, characterized in that, The first side seat includes two first side plates spaced apart along a second direction, and the second side seat includes two second side plates spaced apart along a second direction. Each first side plate is fixedly connected to the first housing, and each second side plate is fixedly connected to the second housing. The two mounting seats are respectively connected to the side of the corresponding second side plate and away from the other second side plate.

3. The explosion-proof combination switch for mining according to claim 2, characterized in that, It also includes a first connecting block and a second connecting block. The first connecting block is fixedly connected to the first side seat, and the second connecting block is fixedly connected to the second sealing plate. When the second sealing plate abuts against the first side seat, the first connecting block can be connected to the second connecting block by bolts.

4. The explosion-proof combination switch for mining according to claim 3, characterized in that, The number of the first connecting block and the number of the second connecting block are both two. The two first connecting blocks are spaced apart on the first side seat along the second direction. Each first connecting block is fixedly connected to the side of the corresponding first side plate away from the other first side plate. The two second connecting blocks are spaced apart on both sides of the second sealing plate along the second direction.

5. The explosion-proof combination switch for mining according to claim 2, characterized in that, It also includes ratchet, lever, and spring. There are two ratchet, two lever, and two spring. The two ratchet are rotatably connected to both sides of the mounting shaft and are located on the side of each second side plate away from the other second side plate. Each lever is rotatably connected to the corresponding mounting base. One end of each lever can engage with the corresponding ratchet. One end of each spring is fixedly connected to the corresponding mounting base, and the other end of each spring abuts against the corresponding lever.

6. The explosion-proof combination switch for mining according to claim 5, characterized in that, It also includes two side rods, which are spaced apart along a second direction. Each side rod is mounted on a corresponding mounting base, and one end of each spring piece is fixedly connected to the corresponding side rod to the corresponding mounting base.

7. The explosion-proof combination switch for mining according to claim 5, characterized in that, It also includes a fixed shaft. The lever includes a contact block, a mounting ring, and a pressing block. The contact block and the pressing block are provided with an included angle and are both fixedly connected to the mounting ring. There are two fixed shafts. Each fixed shaft is fixedly connected to the corresponding mounting base. Each mounting ring is rotatably connected to the corresponding fixed shaft to be rotatably connected to the mounting base.

8. The explosion-proof combination switch for mining according to claim 1, characterized in that, It also includes a mounting bracket and a heat dissipation assembly. The mounting bracket is fixedly connected to the first housing. The heat dissipation assembly includes a heat-conducting plate, heat dissipation fins, a water-cooling plate, an inlet pipe, and an outlet pipe. The heat-conducting plate is fixedly connected to the mounting bracket. A plurality of heat dissipation fins are spaced apart along a second direction and fixedly connected to the heat-conducting plate. The water-cooling plate is fixedly connected to the heat dissipation fins and located on the side of the heat dissipation fins away from the heat-conducting plate. The interior of the water-cooling plate is provided with a cavity for coolant flow. The water-cooling plate is provided with an inlet and an outlet. The inlet and the outlet are connected to the cavity. The inlet pipe is connected to the inlet and to the water-cooling plate. The outlet pipe is connected to the outlet and to the water-cooling plate.

9. The explosion-proof combination switch for mining according to claim 8, characterized in that, The water-cooled plate is fixedly connected with multiple spaced needle columns.

10. The explosion-proof combination switch for mining according to claim 8, characterized in that, It also includes a side support, a limiting seat, a fan connecting frame, a guide rail, a cooling fan, a rack, a support frame, a cooling water pipe, a motor, and a gear. The side support is fixedly connected to the first housing. Two limiting seats are spaced apart on the side support along the second direction. The guide rail is located between the two limiting seats and its two ends are fixedly connected to the two limiting seats respectively. The fan connecting frame is slidably connected to the guide rail. The support frame is fixedly connected to the side support. The cooling water pipe is fixedly connected to the support frame. The inlet end of the cooling water pipe is connected to an external water pump, and the outlet end of the cooling water pipe is connected to the outlet pipe. The cooling fan is fixedly connected to the fan connecting frame, and its air outlet is used to blow air onto the cooling water pipe. The side support has a through groove along the third direction. The rack is connected to the bottom of the fan connecting frame and slidably connected in the through groove. The motor is fixedly connected to the side support. The output shaft of the motor is connected to the gear, and the gear meshes with the rack to drive the cooling fan to slide.

Images