Motor shield of explosion-proof self-heat-dissipation underground trackless scraper

Abstract

The application discloses an explosion-proof self-heat-dissipation motor shield of an underground trackless scraper, relates to the technical field of motor protection components, and comprises a front end cover, a main body shield and a rear end cover; the front end cover and the rear end cover are detachably connected to the main body shield through bolts; the main body shield is of an inner-outer double-layer composite structure and is arranged in an upper-lower split mode, and from inside to outside, the main body shield comprises an inner layer explosion-proof sealing cover and an outer layer reinforced heat-dissipation cover; a heat-conducting interlayer is arranged between the inner layer explosion-proof sealing cover and the outer layer reinforced heat-dissipation cover; the inner layer explosion-proof sealing cover comprises explosion-proof upper and lower covers which are oppositely arranged and have single-sided openings; the outer layer reinforced heat-dissipation cover comprises heat-dissipation upper and lower covers; and two groups of composite heat-dissipation mechanisms are arranged in the heat-conducting interlayer. Through the inner-outer double-layer composite structure, the 45-degree inclined heat-dissipation fins and the composite heat-dissipation mechanism in cooperation with the circulating water tank and the air cooling, the explosion-proof and heat-dissipation conflict problem of the motor of the trackless scraper during operation is solved.

Description

Technical Field

[0001] This invention relates to the field of motor protection components, specifically to an explosion-proof, self-heating motor cover for a trackless underground loader. Background Technology

[0002] As core equipment in underground operations such as mining and tunnel construction, the safety and stability of the motor operation of trackless loaders directly affect operational efficiency and construction safety. The underground environment has significant unique characteristics: firstly, the working space is confined and narrow, with high concentrations of flammable and explosive media such as methane and coal dust. If the electrical sparks generated by the motor come into contact with the external environment, they can easily cause an explosion. Therefore, the explosion-proof sealing performance of the motor cover is a core safety requirement. Secondly, the high dust content underground, with long-term accumulation, can easily cause wear and tear on equipment components and blockage of heat dissipation channels, further exacerbating safety risks.

[0003] The following technical bottlenecks are currently common in the motor guards of underground loader haulers:

[0004] In terms of explosion protection and environmental adaptability, traditional protective covers mostly adopt a single-layer sealed structure. Either they sacrifice ventilation and heat dissipation requirements to ensure explosion protection performance, resulting in the motor heat not being able to dissipate in time, or they lower the sealing standard to improve heat dissipation, making it easy for flammable and explosive media and dust to enter the interior of the protective cover, forming the core contradiction of "explosion protection and heat dissipation".

[0005] In terms of heat dissipation efficiency, existing shields mostly rely on a single heat dissipation method. Passive heat dissipation fins are mostly designed with flat surfaces, resulting in high airflow resistance and limited heat dissipation area. The installation of active heat dissipation devices can easily damage the shield's sealing performance. Furthermore, the coolant circulation system and airflow channels lack reasonable planning, causing mutual interference and resulting in low heat dissipation efficiency. The motor operates in a high-temperature environment for a long time, significantly shortening its service life.

[0006] In terms of adaptability and maintainability, the protective cover is mostly a fixed structure designed for specific motor models. When the motor model is changed, the entire protective cover needs to be replaced, which results in high equipment investment costs and a complicated assembly process. The motor pipeline layout lacks a regular channel, making it prone to tangling and damage. The sealing treatment at the pipeline outlet is also difficult to meet the explosion-proof requirements.

[0007] In terms of structural strength, the bumps and collisions of the loader during downhole operations place high demands on the rigidity of the protective cover. However, the traditional double-layer structure design of the protective cover is unreasonable. Either the use of heavy materials to enhance strength leads to obstructed heat dissipation, or the use of a thin structure to optimize heat dissipation leads to insufficient impact resistance. The connection between the heat dissipation components and the cover is unreliable and is prone to loosening or falling off due to vibration, affecting the overall protective performance of the protective cover.

[0008] In conclusion, the existing technology obviously has inconveniences and defects in practical use, so it is necessary to improve it. Summary of the Invention

[0009] To address the shortcomings of existing technologies, this invention provides an explosion-proof, self-heating motor cover for underground trackless loaders. This addresses issues such as conflicts between explosion protection and heat dissipation, poor adaptability, inconvenient maintenance, and insufficient pipeline sealing in existing underground loader motor covers. Furthermore, it is difficult to balance structural strength and heat dissipation, which can easily lead to safety hazards, motor overheating and losses, and an inability to adapt to harsh underground working conditions.

[0010] To achieve the above objectives, the present invention provides the following technical solution:

[0011] An explosion-proof, self-heating motor cover for a trackless underground loader includes a front cover, a main cover, and a rear cover. The front cover and the rear cover are detachably connected to the main cover by bolts.

[0012] As an optimized solution, the main protective cover has a double-layer composite structure with separate upper and lower parts. From the inside out, it consists of an inner explosion-proof sealing cover and an outer reinforced heat dissipation cover, with a heat-conducting interlayer between the inner explosion-proof sealing cover and the outer reinforced heat dissipation cover.

[0013] As an optimized solution, the inner explosion-proof sealing cover includes an explosion-proof upper cover and an explosion-proof lower cover with openings on one side and facing opposite directions. The explosion-proof upper cover and the explosion-proof lower cover are the same size and are installed by connecting them vertically.

[0014] As an optimized solution, three equally spaced mounting brackets are welded along the transverse direction on the inner peripheral wall of the explosion-proof cover. Each mounting bracket is provided with a limiting plate, and the limiting plate is detachably installed in the mounting bracket by bolts.

[0015] As an optimized solution, the inner ring of the limiting plate protrudes outward to form several triangular contact blocks, which can suspend and support the entire loader motor.

[0016] As an optimized solution, the outer reinforced heat dissipation cover includes an upper heat dissipation cover and a lower heat dissipation cover, wherein the upper heat dissipation cover and the lower heat dissipation cover are square covers of the same size, with openings on one side and facing opposite directions.

[0017] As an optimized solution, a support flange is welded to the outer peripheral wall of the explosion-proof cover near the lower opening, and the lower end of the heat dissipation cover is supported and fixed on the support flange by bolts.

[0018] As an optimized solution, the thermally conductive interlayer is divided into upper and lower parts by two supporting flanges, and the upper and lower parts of the thermally conductive interlayer are respectively provided with two sets of composite heat dissipation mechanisms.

[0019] As an optimized solution, the upper surface of the heat dissipation cover is welded with several main heat dissipation fins arranged at equal intervals and inclined at 45° from bottom to top, and each longitudinal outer wall of the heat dissipation cover is welded with several side heat dissipation fins arranged at equal intervals and inclined at 45° from bottom to top.

[0020] As an optimized solution, a pipeline cluster seat is fixed on the transverse inner wall of one side of the explosion-proof cover.

[0021] As an optimized solution, the lower explosion-proof cover has the same structure as the upper explosion-proof cover, but the arrangement of each component is reversed.

[0022] As an optimized solution, a circular convection air outlet is provided in the middle of the upper surface of the heat dissipation cover, and an air outlet pipe is provided on the outer side of the convection air outlet. The lower end of the air outlet pipe is welded to the heat dissipation cover, and a horizontal dustproof mesh plate is welded on the inner peripheral wall of the air outlet pipe.

[0023] As an optimized solution, each lateral sidewall of the heat dissipation cover is provided with a square convection air inlet, which is positioned directly opposite the gap between the explosion-proof cover and the heat dissipation cover.

[0024] As an optimized solution, the lower heat dissipation shroud also has the same structure as the upper heat dissipation shroud.

[0025] As an optimized solution, the first set of composite heat dissipation mechanisms is disposed between the explosion-proof upper cover and the heat dissipation upper cover.

[0026] As an optimized solution, the second set of composite heat dissipation mechanisms is located between the explosion-proof lower cover and the heat dissipation lower cover, and includes two longitudinally symmetrical circulating water tanks, which are fixedly installed between the longitudinal outer wall of the explosion-proof lower cover and the longitudinal inner wall of the heat dissipation lower cover.

[0027] As an optimized solution, each of the circulating water tanks is provided with several alternating upper baffles and lower baffles. Several upper baffles are fixed at equal intervals on the inner top surface and inner sidewall of the circulating water tank, and several lower baffles are fixed at equal intervals on the inner bottom surface of the circulating water tank. The several upper baffles and lower baffles divide the interior of the circulating water tank into a serpentine circulating water channel.

[0028] As an optimized solution, two transversely symmetrical circulating water pipes are fixed on the lower surface of the circulating water tank. One end of the circulating water pipe passes through the side wall of the circulating water tank and extends into its interior, while the other end of the circulating water pipe passes through the heat dissipation shroud and extends to its exterior.

[0029] As an optimized solution, the second set of composite heat dissipation mechanisms also includes two horizontally symmetrical honeycomb heat-conducting blocks. The two honeycomb heat-conducting blocks are fixed between the outer bottom surface of the explosion-proof lower cover and the inner bottom surface of the heat dissipation lower cover and are positioned directly opposite the two convection air inlets.

[0030] As an optimized solution, the composite heat dissipation mechanism in the first group has the same structure as the composite heat dissipation mechanism in the second group.

[0031] As an optimized solution, several connecting and limiting plates are welded to the lateral side surfaces of the upper and lower heat dissipation covers.

[0032] As an optimized solution, the front cover and the rear cover are fixed to several connecting limiting plates by bolts, and both the front cover and the rear cover are square covers with side openings.

[0033] As an optimized solution, both the front cover and the rear cover are equipped with air-cooled heat dissipation mechanisms.

[0034] As an optimized solution, the air-cooled heat dissipation mechanism includes two mounting air ducts, which are respectively fixed to the lateral outer end faces of the front end cover and the rear end cover and connected thereto.

[0035] As an optimized solution, each of the installation air ducts has an air inlet baffle fixed on its inner peripheral wall, and the air inlet baffle has a number of centrally symmetrical air inlet ports.

[0036] As an optimized solution, a convection fan is fixed on the transverse outer wall of the air inlet baffle, and the output shaft end of the convection fan passes through the air inlet baffle and is fixed with fan blades.

[0037] As an optimized solution, an air inlet grille is also fixed on the inner peripheral wall of the installation duct.

[0038] As an optimized solution, each longitudinal sidewall of the rear end cover is provided with a pipeline outlet, and each pipeline outlet is provided with a sealing plug.

[0039] As an optimized solution, constraint clamps are fitted at both lateral ends of the upper and lower heat dissipation covers.

[0040] Compared with the prior art, the beneficial effects of the present invention are:

[0041] 1. Enhanced explosion-proof protection and environmental adaptability to meet the demands of harsh underground working conditions.

[0042] Through a double-layer composite structure design, the inner explosion-proof sealing cover adopts a fully enclosed square cover structure with upper and lower joints. Combined with the bolt fastening of the front and rear covers and the sealing and filling design of the pipeline outlet, a complete explosion-proof sealing cavity is formed. This effectively prevents flammable and explosive media such as dust and combustible gases from seeping into the cover, avoiding safety accidents caused by electric sparks coming into contact with external media during motor operation. It is fully compatible with the explosion-proof requirements of high-risk underground working environments. At the same time, the installation of air inlet grilles and dustproof mesh plates in the air outlet pipes not only ensures ventilation and heat dissipation but also further prevents dust from entering the heat-conducting interlayer and explosion-proof cavity, reducing the risk of component wear and heat dissipation blockage, and extending the long-term service life of the cover in dusty underground environments.

[0043] 2. Multi-path collaborative heat dissipation design significantly optimizes heat dissipation efficiency and stability.

[0044] A multi-layered, comprehensive cooling system was constructed by employing a synergistic approach that combines active and passive heat dissipation.

[0045] In terms of passive heat dissipation, the main heat dissipation fins and side heat dissipation fins of the outer reinforced heat dissipation cover are all arranged at a 45° angle, which not only increases the contact area with the air, but also guides the airflow to flow smoothly along the direction of the fins, accelerating heat dissipation; the inner explosion-proof sealing cover and the motor are suspended and supported by triangular contact blocks, forming an annular heat dissipation gap, avoiding heat accumulation caused by direct contact between the motor and the cover, while reserving sufficient space for airflow, solving the pain point of heat dissipation blockage of traditional closed covers;

[0046] In terms of active heat dissipation, the convection fans built into the front and rear covers form a forced airflow circulation. The airflow enters the heat-conducting jacket through the air inlet grille and air inlet connection, precisely carrying the heat conducted by the honeycomb heat-conducting filler, and then is discharged through the convection outlet, forming an efficient convection circulation. The serpentine water flow channel in the circulating water tank extends the contact time between the coolant and the inner wall of the water tank, which can fully absorb the heat transferred by the explosion-proof sealing cover, and achieve heat transfer through the external cooling pipes, complementing the airflow heat dissipation.

[0047] The heat-conducting jacket is divided into independent spaces by the supporting flange, allowing the airflow and coolant to flow stably in their respective areas, avoiding mutual interference, further improving heat dissipation efficiency, ensuring that the motor can maintain a suitable operating temperature under long-term high-load operation, and effectively extending the service life of the motor.

[0048] 3. The structure is highly flexible and adaptable, accommodating various motor models and installation and maintenance needs.

[0049] The limit plate adopts a detachable design, which can be adapted to replace the motors of different models and sizes of loader without modifying the main structure of the cover, greatly improving the versatility of the cover and reducing the equipment adaptation cost.

[0050] The main protective cover adopts a modular structure with upper and lower parts and detachable front and rear end covers. The explosion-proof upper cover and explosion-proof lower cover are precisely connected by a support flange. The heat dissipation cover and sealing cover are fixed by bolts. The constraint clamps further strengthen the lateral fixation, which not only ensures the stability of the overall structure, but also facilitates the assembly, maintenance and replacement of the motor.

[0051] The built-in pipeline cluster seat in the explosion-proof top cover and the pipeline outlet of the rear cover form a regular pipeline arrangement channel. Combined with the space reserved for the motor suspension support, the pipelines are arranged in an orderly manner, avoiding entanglement or damage due to pressure. At the same time, the sealing and filling ensures the explosion-proof sealing of the pipeline outlet, taking into account both practicality and safety.

[0052] 4. Synergistic optimization of structural strength and heat dissipation function, balancing protection and performance.

[0053] The outer reinforced heat dissipation cover is rigidly connected to the inner explosion-proof sealing cover through a supporting flange, forming a double-layer reinforced structure. This enhances the overall impact and vibration resistance of the cover, making it adaptable to the bumpy and collision conditions during underground loader operations. The heat dissipation fins are welded to the cover, and the circulating water tank is welded to the heat-conducting filler, ensuring a stable and reliable structure and preventing component loosening or failure due to vibration. At the same time, the honeycomb heat-conducting filler combines thermal conductivity with structural support, transferring heat while helping to fix the relative position of the explosion-proof sealing cover and the heat dissipation cover. This achieves an organic unity of structural strength and heat dissipation function, ensuring both explosion protection and heat dissipation efficiency, and extending the long-term stability of the cover.

[0054] Tests have shown that this shield has a heat dissipation efficiency that is more than 30% higher than that of traditional shields, and its explosion-proof rating meets the ExdIICT4 standard. It can be adapted to 3-5 different models of underground loader motors. Attached Figure Description

[0055] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0056] Figure 1 This is a schematic diagram of the overall external structure of the present invention in the main viewing direction;

[0057] Figure 2 This is a schematic diagram of the overall external structure of the present invention from a top-down perspective;

[0058] Figure 3 This is a schematic diagram of the overall external structure of the present invention from the right-side view direction;

[0059] Figure 4This is an isometric schematic diagram of the three-dimensional structure of the present invention;

[0060] Figure 5 For the present invention along Figure 2 A schematic diagram of the internal structure cut along line AA in the middle;

[0061] Figure 6 For the present invention along Figure 1 A schematic diagram of the internal structure cut along the middle BB line;

[0062] Figure 7 For the present invention along Figure 1 A schematic diagram of the internal structure cut along the CC line;

[0063] Figure 8 For the present invention along Figure 3 A half-section diagram of the three-dimensional structure cut along the DD line;

[0064] Figure 9 For the present invention along Figure 2 A schematic diagram of the internal structure cut along the EE line;

[0065] Figure 10 For the present invention along Figure 1 A schematic diagram of the internal structure cut along the FF line.

[0066] In the diagram: 1-Front end cover, 2-Rear end cover, 3-Explosion-proof upper cover, 4-Explosion-proof lower cover, 5-Support flange, 6-Pipeline bundle seat, 7-Mounting bracket, 8-Limiting plate, 9-Heat dissipation upper cover, 10-Heat dissipation lower cover, 11-Main heat dissipation fins, 12-Side heat dissipation fins, 13-Convection air outlet, 14-Air outlet pipe, 15-Dustproof mesh plate, 16-Convection air inlet, 17-Circulating water tank, 18-Upper baffle plate, 19-Lower baffle plate, 20-Circulating water pipe, 21-Honeycomb thermal conductive filler block, 22-Connecting limiting plate, 23-Installation air duct, 24-Air inlet baffle plate, 25-Air inlet connection port, 26-Convection fan, 27-Fan blade, 28-Air inlet grille, 29-Pipeline outlet, 30-Sealing filler, 31-Restraint clamp. Detailed Implementation

[0067] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solution of the present invention and are therefore intended to limit the scope of protection of the present invention.

[0068] like Figures 1 to 10 As shown, the explosion-proof self-heating underground trackless loader motor cover includes a front cover 1, a main cover and a rear cover 2. The front cover 1 and the rear cover 2 are detachably connected to the main cover by bolts.

[0069] The main protective cover has a double-layer composite structure with separate upper and lower parts. From the inside out, it consists of an inner explosion-proof sealing cover and an outer reinforced heat dissipation cover, with a heat-conducting interlayer between the inner explosion-proof sealing cover and the outer reinforced heat dissipation cover.

[0070] The inner explosion-proof sealing cover includes an explosion-proof upper cover 3 and an explosion-proof lower cover 4. The explosion-proof upper cover 3 is a square cover with an opening at the bottom, and the explosion-proof lower cover 4 is a square cover with an opening at the top. The explosion-proof upper cover 3 and the explosion-proof lower cover 4 are the same size and are installed by connecting them vertically.

[0071] A support flange 5 is welded to the outer peripheral wall of the explosion-proof cover 3 near the lower opening. The support flange 5 is a horizontally set square plate.

[0072] A pipeline cluster seat 6 is fixed on the transverse inner wall of one side of the explosion-proof cover 3.

[0073] The inner circumferential wall of the explosion-proof cover 3 is welded with three equally spaced mounting brackets 7. Each mounting bracket 7 is provided with a limiting plate 8, which is fixed in the mounting bracket 7 by bolts.

[0074] The explosion-proof lower cover 4 is equipped with the same mounting bracket 7, limiting plate 8, pipeline bundle seat 6 and supporting flange 5 as the explosion-proof upper cover 3, but the arrangement of each component is reversed.

[0075] The inner edge of the limiting plate 8 protrudes towards the motor to form several triangular contact blocks. These contact blocks can suspend and support the entire loader motor, which increases the heat dissipation space and avoids heat dissipation blockage. They also facilitate the arrangement of the loader motor pipeline.

[0076] The limit plate 8 can be replaced according to the different models and sizes of the loader motor.

[0077] The outer reinforced heat dissipation cover includes an upper heat dissipation cover 9 and a lower heat dissipation cover 10. Both the upper heat dissipation cover 9 and the lower heat dissipation cover 10 are square covers with openings on one side. The upper heat dissipation cover 9 and the lower heat dissipation cover 10 have the same size but opposite opening directions.

[0078] The lower end of the heat dissipation cover 9 is supported and mounted on the upper surface of the upper support flange 5 and fixed by bolts.

[0079] The upper surface of the heat dissipation cover 9 is welded with several main heat dissipation fins 11 arranged at equal intervals. Each main heat dissipation fin 11 is inclined at 45° from bottom to top. Each longitudinal outer wall of the heat dissipation cover 9 is welded with several side heat dissipation fins 12 arranged at equal intervals. Each side heat dissipation fin 12 is inclined at 45° from bottom to top.

[0080] A circular convection air outlet 13 is provided in the middle of the upper surface of the heat dissipation cover 9. An air outlet 14 is provided on the outer side of the convection air outlet 13. The lower end of the air outlet 14 is welded to the heat dissipation cover 9. A horizontal dustproof mesh plate 15 is welded on the inner peripheral wall of the air outlet 14. The dustproof mesh plate 15 can prevent external dust from entering the inside of the cover.

[0081] Each of the transverse sidewalls of the heat dissipation cover 9 is provided with a square convection air inlet 16, which is positioned directly opposite the gap between the explosion-proof cover 3 and the heat dissipation cover 9.

[0082] The lower heat dissipation shroud 10 also has the same structure as the upper heat dissipation shroud 9.

[0083] The heat-conducting interlayer is divided into upper and lower parts by two supporting flanges 5. The upper and lower heat-conducting interlayers are respectively equipped with two sets of composite heat dissipation mechanisms, wherein the first set of composite heat dissipation mechanisms is located between the explosion-proof upper cover 3 and the heat dissipation upper cover 9.

[0084] The second composite heat dissipation mechanism is located between the explosion-proof lower cover 4 and the heat dissipation lower cover 10, and includes two longitudinally symmetrical circulating water tanks 17. The circulating water tanks 17 are fixedly installed between the longitudinal outer wall of the explosion-proof lower cover 4 and the longitudinal inner wall of the heat dissipation lower cover 10.

[0085] Each circulating water tank 17 is provided with several alternating upper baffle plates 18 and lower baffle plates 19. Several upper baffle plates 18 are fixed at equal intervals on the inner top surface and inner side wall of the circulating water tank 17, and several lower baffle plates 19 are fixed at equal intervals on the inner bottom surface of the circulating water tank 17. Several upper baffle plates 18 and lower baffle plates 19 divide the interior of the circulating water tank 17 into a serpentine circulating water channel.

[0086] Two horizontally symmetrical circulating water pipes 20 are fixed on the lower surface of the circulating water tank 17. One end of the circulating water pipe 20 passes through the side wall of the circulating water tank 17 and extends into its interior, while the other end of the circulating water pipe 20 passes through the heat dissipation cover 10 and extends to its exterior.

[0087] The second composite heat dissipation mechanism also includes two horizontally symmetrical honeycomb heat-conducting blocks 21. The two honeycomb heat-conducting blocks 21 are fixed between the outer bottom surface of the explosion-proof lower cover 4 and the inner bottom surface of the heat dissipation lower cover 10 and are positioned directly opposite the two convection air inlets 16.

[0088] The first set of composite heat dissipation mechanisms has the same structure as the second set of composite heat dissipation mechanisms.

[0089] Several connecting and limiting plates 22 are welded to the lateral side surfaces of the upper heat dissipation cover 9 and the lower heat dissipation cover 10.

[0090] The front cover 1 and the rear cover 2 are fixed to several connecting and limiting plates 22 by bolts. Both the front cover 1 and the rear cover 2 are square covers with side openings.

[0091] Both the front cover 1 and the rear cover 2 are equipped with air-cooling heat dissipation mechanisms.

[0092] The air-cooled heat dissipation mechanism includes two mounting air ducts 23, which are respectively fixed to the transverse outer end faces of the front cover 1 and the rear cover 2 and connected to them.

[0093] Each air duct 23 has an air inlet baffle 24 fixed on its inner peripheral wall, and the air inlet baffle 24 has several centrally symmetrical air inlet ports 25.

[0094] A convection fan 26 is fixed on the transverse outer wall of the air inlet baffle 24. The output shaft of the convection fan 26 passes through the air inlet baffle 24 and is fixed with a fan blade 27.

[0095] An air inlet grille 28 is also fixed on the inner circumferential wall of the air duct 23.

[0096] Each longitudinal sidewall of the rear cover 2 is provided with a pipeline outlet 29, and each pipeline outlet 29 is provided with a sealing plug 30.

[0097] Constraint clamps 31 are fitted at both ends of the heat dissipation upper cover 9 and the heat dissipation lower cover 10.

[0098] When using this invention:

[0099] First, assemble the loader motor: According to the model and size of the loader motor used, select the appropriate limit plate 8 and install it into the mounting bracket 7 of the explosion-proof upper cover 3 and explosion-proof lower cover 4. The motor is suspended and supported by the triangular contact block of the inner ring of the limit plate 8.

[0100] This suspended design creates an annular heat dissipation gap between the motor and the inner explosion-proof sealing cover, avoiding heat accumulation and blockage caused by direct contact. On the other hand, it provides sufficient space for the motor pipeline layout. The pipeline can be neatly arranged along the gap and led out from the pipeline outlet 29 of the rear cover 2. The outlet is sealed by the sealing plug 30 to prevent dust and gas from seeping into the well.

[0101] Then, the explosion-proof upper cover 3 and explosion-proof lower cover 4 are connected vertically and vertically, and precise positioning is achieved by supporting flange 5. Then, the heat dissipation upper cover 9 and heat dissipation lower cover 10 are respectively fastened to the outside of the explosion-proof upper cover 3 and explosion-proof lower cover 4 and fixed with bolts. Finally, the constraint clamps 31 are clamped and sleeved on the horizontal ends of the heat dissipation upper cover 9 and heat dissipation lower cover 10 to complete the assembly of the main protective cover. Finally, the front cover 1 and rear cover 2 equipped with the air-cooled heat dissipation mechanism are fixed to both ends of the main protective cover by connecting limit plates 22 to form a fully enclosed explosion-proof protection structure.

[0102] During heat dissipation operations, a multi-path collaborative mode combining active and passive heat dissipation is adopted:

[0103] First, start the convection fan 26 inside the front cover 1 and the rear cover 2. The fan blades 27 rotate to generate directional airflow. The airflow enters the installation air duct 23 through the air inlet grille 28, and enters the interior of the front cover 1 or the rear cover 2 through the centrally symmetrical air inlet connection 25 on the air inlet baffle 24. Then, it enters the heat conduction jacket through the convection air inlet 16 on the transverse side wall of the heat dissipation upper cover 9 and the heat dissipation lower cover 10 to form convection.

[0104] The heat generated by the loader motor is transferred outward through the explosion-proof sealing cover and conducted to the honeycomb heat-conducting filler 21 through contact. The heat is then carried away by the opposing airflow flowing through the honeycomb heat-conducting filler 21.

[0105] Connect the end of the circulating water pipe 20 to the cooling pipe, thereby injecting the coolant into the circulating water tank 17. The coolant entering the circulating water tank 17 flows along the serpentine circulating water channel. The serpentine tortuous structure prolongs the contact time between the coolant and the inner wall of the water tank, fully absorbing the heat transferred by the explosion-proof sealing cover.

[0106] After absorbing heat, the coolant circulates with the external cooling system through the circulating water pipe 20, continuously transferring heat to the outside of the shield;

[0107] The heat-conducting jacket is divided into upper and lower layers by the supporting flange 5, which allows the airflow and coolant to flow in independent spaces, avoiding mutual interference and improving heat dissipation efficiency.

[0108] The heat is ultimately discharged through multiple paths: on the one hand, the airflow after absorbing heat is driven by the convection fan 26, enters the air outlet 14 through the convection outlet 13 in the middle of the heat dissipation cover 9, and is discharged from the cover through the dustproof mesh plate 15, forming a complete forced convection cycle; on the other hand, the heat of the inner explosion-proof sealing cover is transferred to the outer reinforced heat dissipation cover through heat conduction, and the main heat dissipation fins 11 on the upper surface of the heat dissipation cover 9 and the side heat dissipation fins 12 on the longitudinal outer wall quickly dissipate the heat to the external environment, realizing passive heat dissipation supplementation.

[0109] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. An explosion-proof, self-heating motor cover for a trackless underground loader, characterized in that: It includes a front cover, a main body cover, and a rear cover, wherein the front cover and the rear cover are detachably connected to the main body cover by bolts; The main protective cover is a double-layer composite structure with separate upper and lower parts. From the inside out, it consists of an inner explosion-proof sealing cover and an outer reinforced heat dissipation cover. A heat-conducting interlayer is provided between the inner explosion-proof sealing cover and the outer reinforced heat dissipation cover. The inner explosion-proof sealing cover includes an explosion-proof upper cover and an explosion-proof lower cover with openings on one side and facing opposite directions. The explosion-proof upper cover and the explosion-proof lower cover are the same size and are installed by connecting them vertically. The explosion-proof cover has three equally spaced mounting brackets welded horizontally along its inner peripheral wall. Each mounting bracket is provided with a limiting plate, which is detachably installed in the mounting bracket by bolts. The inner ring of the limiting plate protrudes outward to form several triangular contact blocks, which can suspend and support the entire loader motor. The outer reinforced heat dissipation cover includes an upper heat dissipation cover and a lower heat dissipation cover. The upper heat dissipation cover and the lower heat dissipation cover are square covers of the same size, with openings on one side and facing opposite directions. The heat-conducting interlayer is divided into upper and lower parts. The two parts of the heat-conducting interlayer are equipped with two sets of composite heat dissipation mechanisms. The two sets of composite heat dissipation mechanisms include a first set and a second set. Each set of composite heat dissipation mechanisms includes a circulating water tank and a honeycomb heat-conducting filler block. The upper surface of the heat dissipation cover is welded with several main heat dissipation fins arranged at equal intervals and inclined at 45° from bottom to top. Each longitudinal outer wall of the heat dissipation cover is welded with several side heat dissipation fins arranged at equal intervals and inclined at 45° from bottom to top. A circular convection air outlet is provided in the middle of the upper surface of the heat dissipation cover. An air outlet pipe is provided on the outer side of the convection air outlet. The lower end of the air outlet pipe is welded to the heat dissipation cover. A horizontal dustproof mesh plate is welded on the inner peripheral wall of the air outlet pipe. Each of the transverse sidewalls of the heat dissipation shroud is provided with a square convection air inlet, which is positioned directly opposite the gap between the explosion-proof shroud and the heat dissipation shroud. The lower heat dissipation cover also has the same structure as the upper heat dissipation cover; The composite heat dissipation mechanism described in the first group has the same structure as the composite heat dissipation mechanism described in the second group; The first set of composite heat dissipation mechanisms is located between the explosion-proof upper cover and the heat dissipation upper cover; The second set of composite heat dissipation mechanisms is located between the explosion-proof lower cover and the heat dissipation lower cover, and includes two longitudinally symmetrical circulating water tanks. The circulating water tanks are fixedly installed between the longitudinal outer wall of the explosion-proof lower cover and the longitudinal inner wall of the heat dissipation lower cover. Each of the circulating water tanks is provided with several alternating upper and lower baffles. Several upper baffles are fixed at equal intervals on the inner top surface and inner side wall of the circulating water tank, and several lower baffles are fixed at equal intervals on the inner bottom surface of the circulating water tank. The several upper and lower baffles divide the interior of the circulating water tank into a serpentine circulating water channel. The second set of composite heat dissipation mechanisms also includes two horizontally symmetrical honeycomb heat-conducting blocks. The two honeycomb heat-conducting blocks are fixed between the outer bottom surface of the explosion-proof lower cover and the inner bottom surface of the heat dissipation lower cover and are positioned directly opposite the two convection air inlets. Both the front cover and the rear cover are equipped with a wind-cooling heat dissipation mechanism. The wind-cooling heat dissipation mechanism includes two mounting air ducts, which are respectively fixed to the transverse outer end face of the front cover and the rear cover and connected thereto. Each of the aforementioned installation air ducts has an air inlet baffle fixed on its inner peripheral wall, and the air inlet baffle has a number of centrally symmetrical air inlet ports. A convection fan is fixed on the transverse outer wall of the air inlet baffle, and the output shaft of the convection fan passes through the air inlet baffle and is fixed with fan blades. An air inlet grille is also fixed on the inner peripheral wall of the installation duct.

2. The explosion-proof self-heating underground trackless loader motor cover according to claim 1, characterized in that: A support flange is welded to the outer peripheral wall of the explosion-proof upper cover near the lower opening. The lower end of the heat dissipation upper cover is supported and fixed on the support flange by bolts. A pipeline bundler is fixed on the transverse inner wall of one side of the explosion-proof cover; The lower explosion-proof cover has the same structure as the upper explosion-proof cover, but the arrangement of each component is reversed.

3. The explosion-proof self-heating underground trackless loader motor cover according to claim 1, characterized in that: Two horizontally symmetrical circulating water pipes are fixed on the lower surface of the circulating water tank. One end of the circulating water pipe passes through the side wall of the circulating water tank and extends into its interior, while the other end of the circulating water pipe passes through the heat dissipation shroud and extends to its exterior.

4. The explosion-proof self-heating underground trackless loader motor cover according to claim 1, characterized in that: Several connecting and limiting plates are welded to the lateral side end faces of the upper heat dissipation cover and the lower heat dissipation cover. The front end cover and the rear end cover are fixed to several connecting limiting plates by bolts. Both the front end cover and the rear end cover are square covers with side openings.

5. The explosion-proof self-heating underground trackless loader motor cover according to claim 1, characterized in that: Each longitudinal sidewall of the rear end cover is provided with a pipeline outlet, and each pipeline outlet is provided with a sealing plug. The upper and lower heat dissipation covers are fitted with constraint clamps at their lateral ends.

Images