Anti-explosion double-brake electric hoist

Abstract

The application discloses an explosion-proof double-braking electric hoist, and relates to the technical field of electric hoists, which comprises a main shell, a braking assembly and an air inlet cylinder. The braking assembly is installed on one side of the main shell and comprises a braking motor, a speed reducer and a high-speed shaft electromagnetic power-off brake. The output shaft of the braking motor is provided with the speed reducer, and the high-speed shaft of the speed reducer is additionally provided with the high-speed shaft electromagnetic power-off brake. The braking assembly is externally provided with an explosion-proof lower shell and an explosion-proof upper shell, and the explosion-proof lower shell is fixedly connected with the main shell. The explosion-proof double-braking electric hoist can protect the braking assembly from explosion by enclosing the braking assembly with the explosion-proof lower shell and the explosion-proof upper shell. After external air enters the shell through the air inlet cylinder and the ventilation hole, the air flows along the regular airflow direction of the uniformly arranged guide plates on the inner wall, so that the friction heat generated by the operation of the braking assembly can be quickly removed, and finally, the air is forced to be discharged by the air outlet fan on the outer side of the shell, thereby forming a continuous circulating heat dissipation system.

Description

Technical Field

[0001] This invention relates to the field of electric hoist technology, specifically to an explosion-proof double-brake electric hoist. Background Technology

[0002] An electric hoist is a lifting device that uses an electric motor to lift and move goods. It mainly uses an electric motor to drive a drum or sprocket, converting electrical energy into mechanical energy, which in turn drives a chain or wire rope to lift or lower heavy objects.

[0003] For example, the invention with application number 02321829105.9 discloses an explosion-proof electric hoist. Electric hoists similar to the above application still have the following shortcomings: they usually generate a lot of frictional heat during operation, but they are not equipped with a dedicated air intake, air guide, and air exhaust structure. The heat inside the shell is seriously accumulated and cannot be dissipated quickly, which leads to the brake structure being prone to high-temperature aging, the surface temperature of the equipment exceeding the standard, and it is very easy to ignite combustible gases and dust in the working environment, resulting in insufficient explosion-proof safety. Summary of the Invention

[0004] The purpose of this invention is to provide an explosion-proof double-brake electric hoist to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an explosion-proof double-brake electric hoist, comprising a main housing, a braking assembly, and an air inlet duct. The braking assembly is installed on one side of the main housing, and the braking assembly includes a brake motor, a reducer, and a high-speed shaft electromagnetic power-off brake. The reducer is installed on one side of the output shaft of the brake motor, and a high-speed shaft electromagnetic power-off brake is added to the height shaft end of the reducer. An explosion-proof lower shell and an explosion-proof upper shell are provided outside the braking assembly, and the explosion-proof lower shell is fixedly connected to the main housing. An air inlet duct is fixedly installed on the side of the explosion-proof lower shell and the explosion-proof upper shell near the main housing, and a filter screen is fixedly installed on one side of the air inlet duct. Ventilation holes are provided between the explosion-proof lower shell, the explosion-proof upper shell, and the air inlet duct. Guide plates are uniformly fixed on the inner walls of the explosion-proof lower shell and the explosion-proof upper shell. An exhaust fan is embedded in the middle of the side of the explosion-proof lower shell and the explosion-proof upper shell away from the main housing.

[0006] Furthermore, the lower side of the main housing has an open structure, and a roller is rotatably mounted inside the main housing via a rotating shaft.

[0007] Furthermore, the centerline of the drum coincides with the centerline of the main housing, and a lifting rope is wound around the outer side of the drum.

[0008] Furthermore, the braking assembly also includes an explosion-proof observation window, and the upper side wall of the housing of the high-speed shaft electromagnetic power failure brake is provided with an explosion-proof observation window.

[0009] Furthermore, the air inlet duct is a hollow semi-circular structure, and the air inlet duct and the explosion-proof lower shell or explosion-proof upper shell are concentric circles.

[0010] Furthermore, a water-blocking baffle is provided inside the air inlet duct on the side near the filter screen, and the water-blocking baffle has a ring-shaped structure. The water-blocking baffle is fixed to the outer surface of the explosion-proof lower shell and the explosion-proof upper shell, and a ventilation channel is left between the water-blocking baffle and the inner wall of the air inlet duct.

[0011] Furthermore, one outer wall of the explosion-proof lower shell and the explosion-proof upper shell is uniformly fixed with reinforcing ribs in a ring array, and the reinforcing ribs are arc-shaped protrusions.

[0012] Furthermore, both sides of the explosion-proof lower shell and the explosion-proof upper shell are fixed with ear plates, and connecting bolts pass through between the ear plates. At the same time, the mating surface between the upper and lower ear plates is an explosion-proof mating surface.

[0013] This invention provides an explosion-proof double-brake electric hoist, which has the following beneficial effects: This invention features an explosion-proof lower shell and an explosion-proof upper shell. The lower and upper shells enclose the braking assembly, providing explosion-proof protection. The side lugs of the lower and upper shells are fastened together with connecting bolts, allowing the upper shell to be disassembled for easy inspection and maintenance of the internal braking assembly. The contact surfaces of the two lugs are designed as explosion-proof mating surfaces. The arc-shaped raised reinforcing ribs distributed in a ring array on the outer walls of the lower and upper shells enhance the structural strength and impact resistance of the explosion-proof housing. The high-speed shaft electromagnetic power-off brake installed at the height shaft end of the brake motor and reducer constitutes a dual braking structure. The explosion-proof observation window on the housing of the high-speed shaft electromagnetic power-off brake allows observation of the wear and operating status of the braking components without compromising the structural integrity of the brake.

[0014] This invention features an air inlet duct and an air outlet fan. The explosion-proof lower shell and upper shell are fitted with semi-circular hollow air inlets. The end filters effectively intercept external dust and debris while providing ventilation. The annular water-blocking baffle inside the air inlet duct prevents rainwater and condensate from seeping in, while also allowing for ventilation channels to ensure normal airflow, achieving both waterproofing and ventilation. External air enters the shell through the air inlet duct and ventilation holes, and the evenly distributed guide plates on the inner wall regulate the airflow, quickly carrying away the frictional heat generated by the braking components. Finally, the air is forcibly exhausted by the air outlet fan on the outside of the shell, forming a continuous circulating cooling system. This effectively reduces the equipment's operating temperature, preventing high temperatures from igniting surrounding explosive media, and also preventing high-temperature aging of the braking components, thus extending the equipment's service life. Attached Figure Description

[0015] Figure 1 This is a half-sectional structural diagram of an explosion-proof double-brake electric hoist according to the present invention; Figure 2 This is a schematic diagram of the overall structure of an explosion-proof double-brake electric hoist according to the present invention; Figure 3 This is a schematic diagram of the half-section structure of the explosion-proof upper shell of an explosion-proof double-brake electric hoist according to the present invention.

[0016] In the diagram: 1. Main housing; 2. Rotating shaft; 3. Drum; 4. Lifting rope; 5. Braking assembly; 501. Brake motor; 502. Reducer; 503. High-speed shaft electromagnetic de-energizer; 504. Explosion-proof observation window; 6. Explosion-proof lower housing; 7. Explosion-proof upper housing; 8. Air inlet duct; 9. Filter screen; 10. Water baffle; 11. Ventilation hole; 12. Guide plate; 13. Exhaust fan; 14. Reinforcing rib; 15. Ear plate; 16. Connecting bolt. Detailed Implementation

[0017] The 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 should not be construed as limiting the scope of the invention.

[0018] like Figure 1 As shown, an explosion-proof double-brake electric hoist includes a main housing 1, a braking assembly 5, and an air inlet duct 8. The lower side of the main housing 1 has an open structure, and a drum 3 is rotatably mounted inside the main housing 1 via a rotating shaft 2. The centerline of the drum 3 coincides with the centerline of the main housing 1, and a hoisting rope 4 is wound around the outside of the drum 3. The braking assembly 5 is installed on one side of the main housing 1, and the braking assembly 5 includes a brake motor 501, a reducer 502, and a high-speed shaft electromagnetic de-energizer 503. The reducer 502 is installed on one side of the output shaft of the brake motor 501, and the high-speed shaft electromagnetic de-energizer 503 is added to the height shaft end of the reducer 502. The braking assembly 5 also includes an air inlet duct. An explosion-proof observation window 504 is provided on the upper side wall of the housing of the high-speed shaft electromagnetic power failure brake 503. The brake motor 501 can drive the rotation of the rotating shaft 2 and the drum 3, thereby facilitating the winding of the outer hoisting rope 4 and the hook on the drum 3, ensuring the stable lifting and lowering operation of the hoisting rope 4. The brake motor 501 and the high-speed shaft electromagnetic power failure brake 503 installed at the height shaft end of the reducer 502 form a dual braking structure. The explosion-proof observation window 504 provided on the housing of the high-speed shaft electromagnetic power failure brake 503 allows observation of the wear and operating status of its braking components without damaging the structural integrity of the brake, thereby reducing the difficulty of equipment maintenance and improving operation and maintenance efficiency.

[0019] like Figure 1 and Figure 2As shown, the braking assembly 5 is externally provided with an explosion-proof lower shell 6 and an explosion-proof upper shell 7. The explosion-proof lower shell 6 is fixedly connected to the main shell 1. Ear plates 15 are fixed to both sides of the explosion-proof lower shell 6 and the explosion-proof upper shell 7, and connecting bolts 16 pass through the ear plates 15. The mating surface between the upper and lower ear plates 15 is an explosion-proof mating surface. Reinforcing ribs 14 are uniformly fixed in a circular array on one outer wall of the explosion-proof lower shell 6 and the explosion-proof upper shell 7, and the reinforcing ribs 14 have an arc-shaped protruding structure. Through explosion-proof... The lower shell 6 and the explosion-proof upper shell 7 enclose the braking assembly 5 to provide explosion-proof protection for the braking assembly 5. The side ear plates 15 of the explosion-proof lower shell 6 and the explosion-proof upper shell 7 are fastened together by connecting bolts 16, so that the explosion-proof upper shell 7 can be disassembled to facilitate the inspection and maintenance of the internal braking assembly 5. The contact surfaces of the two ear plates 15 are designed as explosion-proof mating surfaces. The arc-shaped raised reinforcing ribs 14 distributed in a ring on the outer wall of the explosion-proof lower shell 6 and the explosion-proof upper shell 7 can improve the structural strength and impact resistance of the explosion-proof shell.

[0020] like Figure 1 and Figure 3 As shown, an air inlet duct 8 is fixed to the exterior of both the explosion-proof lower shell 6 and the explosion-proof upper shell 7 on the side closest to the main shell 1, and a filter screen 9 is fixed to one side of the air inlet duct 8. The air inlet duct 8 is a hollow semi-circular structure, and the air inlet duct 8 and the explosion-proof lower shell 6 or the explosion-proof upper shell 7 are concentric circles. A water baffle 10 is provided inside the air inlet duct 8 on the side closest to the filter screen 9, and the water baffle 10 is a ring-shaped structure. The water baffle 10 is fixed to the outer surface of the explosion-proof lower shell 6 and the explosion-proof upper shell 7, and a ventilation channel is left between the water baffle 10 and the inner wall of the air inlet duct 8. A ventilation hole 11 is provided between the explosion-proof lower shell 6, the explosion-proof upper shell 7 and the air inlet duct 8, and guide plates 12 are evenly fixed to the inner wall of the explosion-proof lower shell 6 and the explosion-proof upper shell 7. A filter screen 9 is embedded in the middle of the side of the explosion-proof lower shell 6 and the explosion-proof upper shell 7 away from the main shell 1. The exhaust fan 13; the explosion-proof lower shell 6 and the explosion-proof upper shell 7 are equipped with a semi-circular hollow air inlet duct 8. The filter screen 9 at the end can effectively intercept external dust and debris while ventilating. The annular water baffle 10 inside the air inlet duct 8 can prevent rainwater and condensate from seeping in, while reserving a ventilation channel to ensure normal air circulation, achieving the dual effect of waterproofing and ventilation. After the external air enters the shell through the air inlet duct 8 and ventilation holes 11, the airflow direction is regulated by the guide plates 12 evenly distributed on the inner wall, which can quickly remove the frictional heat generated by the braking component 5. Finally, it is forcibly discharged by the exhaust fan 13 on the outside of the shell, forming a continuous circulation heat dissipation system, effectively reducing the operating temperature of the equipment, avoiding the high temperature from igniting the surrounding explosive medium, and preventing the high temperature from aging the braking components, thus extending the service life of the equipment.

[0021] In summary, as Figures 1-3As shown, this explosion-proof double-brake electric hoist can first be started by powering on, causing the brake motor 501 to output power. After being reduced in speed and torque by the reducer 502, the power is transmitted to the rotating shaft 2, which drives the drum 3 centrally located inside the main housing 1 to rotate smoothly. Then, the forward and reverse rotation of the drum 3 controls the winding and unwinding of the hoisting rope 4, realizing the lifting and hoisting of heavy objects. Throughout the operation, the explosion-proof lower shell 6 and explosion-proof upper shell 7 completely enclose the braking assembly 5. The outer wall arc-shaped reinforcing ribs 14 enhance the impact resistance of the shell and isolate internal electrical sparks. During use, clean outside air enters the equipment through the air inlet duct 8, and at this time, the filter screen 9... Dust and impurities are intercepted, and then the annular water baffle 10 prevents rainwater and water vapor from seeping into the shell. Then, air enters the explosion-proof shell through the ventilation channel between the air inlet duct 8 and the water baffle 10 and the ventilation hole 11. Subsequently, under the guidance of the guide plate 12 on the inner wall of the shell, the airflow flows evenly through the high-speed shaft electromagnetic power failure brake 503, reducer 502, brake motor 501 and other heat-generating core components, quickly carrying away the heat generated by friction and operation. Finally, the exhaust fan 13 forces the exhaust out of the shell, forming a circulating heat dissipation system, effectively controlling the surface and internal temperature of the equipment, and avoiding the risk of high temperature explosion. After the hoisting operation is completed, the equipment enters the braking and shutdown stage. At this time, the system triggers the power-off control. The brake motor 501 undertakes the routine braking task for the daily start and stop of the equipment. In case of sudden failure, the high-speed shaft electromagnetic power failure brake 503 can instantly lock the high-speed shaft of the reducer 502. With the help of the whole machine's dual braking structure, it can achieve rapid and stable braking, so that the drum 3 stops rotating immediately, locks the position of the hoisting rope 4 and the heavy object, and eliminates the risk of rope slippage and falling objects. During the shutdown protection stage, the connecting bolts 16 at the ear plate 15 between the explosion-proof lower shell 6 and the explosion-proof upper shell 7 can be removed and the explosion-proof upper shell 7 can be separated. At this time, the internal condition of the high-speed shaft electromagnetic power failure brake 503 can be visually inspected through the explosion-proof observation window 504. Otherwise, the explosion-proof lower shell 6 and the explosion-proof upper shell 7 can be reinstalled. This completes the use process of the explosion-proof double brake electric hoist.

[0022] The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and to design various embodiments with various modifications suitable for a particular purpose.

Claims

1. An explosion-proof double-brake electric hoist, comprising a main housing (1), a braking assembly (5), and an air inlet duct (8), characterized in that, A braking assembly (5) is installed on one side of the main housing (1), and the braking assembly (5) includes a brake motor (501), a reducer (502) and a high-speed shaft electromagnetic power-off brake (503). The reducer (502) is installed on one side of the output shaft of the brake motor (501), and the high-speed shaft electromagnetic power-off brake (503) is installed on the height shaft end of the reducer (502). An explosion-proof lower shell (6) and an explosion-proof upper shell (7) are provided on the outside of the braking assembly (5), and the explosion-proof lower shell (6) and the main housing (1) are fixed. The explosion-proof lower shell (6) and explosion-proof upper shell (7) are fixed with air inlets (8) on the side of the main shell (1) and a filter screen (9) is fixed on one side of the air inlets (8). Ventilation holes (11) are provided between the explosion-proof lower shell (6), explosion-proof upper shell (7) and air inlets (8). Guide plates (12) are evenly fixed on the inner walls of the explosion-proof lower shell (6) and explosion-proof upper shell (7). An exhaust fan (13) is embedded in the middle of the side of the explosion-proof lower shell (6) and explosion-proof upper shell (7) away from the main shell (1).

2. The explosion-proof double-brake electric hoist according to claim 1, characterized in that, The lower side of the main housing (1) has an open structure, and a roller (3) is rotatably installed inside the main housing (1) via a rotating shaft (2).

3. The explosion-proof double-brake electric hoist according to claim 2, characterized in that, The centerline of the drum (3) coincides with the centerline of the main housing (1), and a hanging rope (4) is wound around the outside of the drum (3).

4. The explosion-proof double-brake electric hoist according to claim 1, characterized in that, The braking assembly (5) also includes an explosion-proof observation window (504), and the upper side wall of the housing of the high-speed shaft electromagnetic power failure brake (503) is provided with an explosion-proof observation window (504).

5. The explosion-proof double-brake electric hoist according to claim 1, characterized in that, The air inlet duct (8) is a hollow semi-circular structure, and the air inlet duct (8) and the explosion-proof lower shell (6) or explosion-proof upper shell (7) are concentric circles.

6. The explosion-proof double-brake electric hoist according to claim 1, characterized in that, A water baffle (10) is provided on the side of the air inlet duct (8) near the filter screen (9), and the water baffle (10) is a ring-shaped structure. The water baffle (10) is fixed to the outer surface of the explosion-proof lower shell (6) and the explosion-proof upper shell (7), and a ventilation channel is left between the water baffle (10) and the inner wall of the air inlet duct (8).

7. The explosion-proof double-brake electric hoist according to claim 1, characterized in that, The outer wall of the explosion-proof lower shell (6) and the explosion-proof upper shell (7) is uniformly fixed with reinforcing ribs (14) in a ring array, and the reinforcing ribs (14) are arc-shaped protrusions.

8. The explosion-proof double-brake electric hoist according to claim 1, characterized in that, Both sides of the explosion-proof lower shell (6) and explosion-proof upper shell (7) are fixed with ear plates (15), and connecting bolts (16) pass through between the ear plates (15). At the same time, the joint surface between the upper and lower ear plates (15) is an explosion-proof joint surface.

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