Explosion-proof bridge crane

Abstract

The invention discloses an explosion-proof bridge crane which comprises a trolley and a protective cover, a mounting frame is fixedly mounted on the protective cover, two mounting frames are slidably mounted on the mounting frame, a lead screw is rotatably mounted on the mounting frame, and the lead screw penetrates through the two mounting frames and is in threaded connection with the two mounting frames. An air inlet is formed in each mounting frame, filter frames are embedded in the two mounting frames, two symmetrically-distributed movable frames are slidably mounted in the mounting frames, roller brushes are rotatably mounted on the movable frames, directional ventilation is achieved through cooperation of a fan and an adjustable filter frame structure, the working temperature of a motor and electrical components is effectively reduced, and the service life of the motor and the electrical components is prolonged. The linkage design of the roller brush and the scraping brush can automatically remove dust and oil dirt accumulated on the surface of the filter frame, continuous smoothness of an airflow channel is ensured, and the performance reduction or explosion risk caused by poor heat dissipation is avoided.

Description

Technical Field

[0001] This invention relates to the field of crane technology, specifically to an explosion-proof bridge crane. Background Technology

[0002] Explosion-proof bridge cranes are heavy lifting equipment specifically designed for flammable and explosive environments. They are widely used in industries such as petrochemicals, coal, military, and pharmaceuticals. Their core design requirement is to ensure lifting capacity while effectively preventing the risk of explosion caused by electrical sparks, mechanical friction, or high temperatures.

[0003] In existing technologies, when explosion-proof bridge cranes operate in flammable and explosive environments, the motors and electrical components of the trolley are prone to high temperatures due to prolonged high-load operation. Poor heat dissipation may lead to a decline in equipment performance or even safety hazards. At the same time, the accumulation of dust and oil in the working environment not only affects heat dissipation efficiency but may also cause electrical faults or increase the risk of explosion. Currently, most solutions rely on external heat dissipation devices or regular manual cleaning, which are characterized by low efficiency, high maintenance costs, and inability to respond in real time. Summary of the Invention

[0004] The purpose of this invention is to provide an explosion-proof bridge crane 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 bridge crane, comprising a trolley and a protective cover, wherein the protective cover is fixedly installed on the trolley via mechanical connectors, a fan is fixedly embedded in the protective cover, and a mounting frame is fixedly installed on the protective cover, the mounting frame being correspondingly arranged with the fan, two sets of mounting frames are slidably installed on the mounting frame, and a lead screw is rotatably installed on the mounting frame, the lead screw passing through the two sets of mounting frames and being threadedly connected to the two sets of mounting frames respectively, an air inlet is provided on the mounting frame, filter frames are embedded in both sets of mounting frames, two sets of symmetrically distributed clamping frames are slidably installed on the mounting frame, two sets of symmetrically distributed movable frames are slidably installed inside the mounting frame, a roller brush is rotatably installed on the movable frame, the roller brush being able to fit against the filter frame, a scraper is slidably installed on the movable frame, the scraper being fitted against the roller brush, two sets of sliding frames are slidably installed inside the mounting frame, and a plug rod is fixedly installed on each of the two sets of sliding frames, the two sets of plug rods being movably engaged with the corresponding filter frame.

[0006] As a further preferred embodiment of this technical solution, both sets of card frames are correspondingly arranged with air inlets, and both sets of mounting frames have two sets of symmetrically distributed card slots. Both sets of card frames are provided with telescopic tubes between them and the mounting frame. Both sets of card frames are movably engaged with the mounting frame through the card slots. A bidirectional screw is rotatably mounted on the mounting frame, and the two ends of the bidirectional screw pass through the two sets of card frames and are threadedly connected to the two sets of card frames respectively.

[0007] As a further preferred embodiment of this technical solution, two sets of threaded rods are rotatably installed inside the mounting frame. The two sets of threaded rods are respectively arranged corresponding to two sets of movable frames. The two sets of threaded rods pass through the corresponding movable frames and are threadedly connected to the corresponding movable frames.

[0008] As a further preferred embodiment of this technical solution, a slide rod is fixedly installed on the movable frame, the scraper is slidably connected to the slide rod via a slider, and a cam is rotatably installed inside the movable frame, the cam being fitted into the slider.

[0009] As a further preferred embodiment of this technical solution, two sets of symmetrically distributed second springs are sleeved on the slide rod, and the two ends of the two sets of second springs are respectively fixedly connected to the slider and the moving frame.

[0010] As a further preferred embodiment of this technical solution, a first spring is sleeved on each of the two sets of insert rods, a rack is fixedly installed on each of the two sets of slides, a gear is provided between the two sets of racks, the gear meshes with the two sets of racks respectively, the gear is rotatably connected to the mounting frame through the mounting shaft, and the two sets of slides are centrally symmetrical about the mounting shaft.

[0011] As a further preferred embodiment of this technical solution, the two ends of the two sets of first springs are respectively fixedly connected to the insert rod and the mounting frame, and a torsion spring is sleeved on the mounting shaft, with the two ends of the torsion spring being fixedly connected to the mounting shaft and the mounting frame respectively.

[0012] This invention provides an explosion-proof bridge crane, which has the following advantages: (1) By integrating a fan and an automatic cleaning mechanism, the present invention significantly improves the heat dissipation efficiency and safety of the vehicle. The fan, in conjunction with the adjustable filter frame structure, achieves directional ventilation, effectively reducing the working temperature of the motor and electrical components. The linkage design of the roller brush and the scraper brush can automatically remove the dust and oil accumulated on the surface of the filter frame, ensuring that the airflow channel remains unobstructed, avoiding performance degradation or explosion risk due to poor heat dissipation, and at the same time greatly reducing the frequency of manual cleaning and maintenance costs.

[0013] (2) The present invention achieves quick locking and releasing through the elastic engagement of the insert rod and the slide. The operator can operate the gear transmission mechanism with one hand without tools, and simultaneously control the insert rods on both sides to disengage from the filter frame. With the screw drive of the sliding mounting frame, the entire filter frame can be replaced or cleaned quickly. This design not only adapts to the flexible adjustment requirements of filter screen accuracy under different working conditions, but also significantly shortens maintenance downtime and improves the applicability and maintainability of the equipment. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram showing the structural separation of the protective cover and the mounting bracket of the present invention; Figure 3 This is a schematic diagram of the internal structure of the mounting bracket of the present invention; Figure 4 This is a schematic diagram showing the structural separation of the mounting frame and filter frame of the present invention; Figure 5 For the present invention Figure 4 Enlarged view of the structure at point A; Figure 6 This is a schematic diagram showing the separation of the movable frame and the roller brush in this invention; Figure 7 For the present invention Figure 6 Enlarged view of the structure at point -B; In the diagram: 1. Cart; 2. Protective cover; 3. Mounting bracket; 4. Fan; 5. Mounting frame; 6. Lead screw; 7. Clip frame; 8. Telescopic tube; 9. Double-acting screw; 10. Slot; 11. Filter frame; 12. Slide frame; 13. Insert rod; 14. First spring; 15. Rack; 16. Gear; 17. Mounting shaft; 18. Torsion spring; 19. Moving frame; 20. Threaded rod; 21. Roller brush; 22. Scraper brush; 23. Slide rod; 24. Second spring; 25. Slider; 26. Cam; 27. Air inlet. Detailed Implementation

[0015] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0016] This invention provides a technical solution: such as Figures 1-7As shown in this embodiment, an explosion-proof bridge crane includes a trolley 1 and a protective cover 2. The protective cover 2 is fixedly installed on the trolley 1 via mechanical connectors. A fan 4 is fixedly embedded in the protective cover 2. A mounting frame 3 is fixedly installed on the protective cover 2, corresponding to the fan 4. Two sets of mounting frames 5 are slidably installed on the mounting frame 3. A lead screw 6 is rotatably installed on the mounting frame 3, passing through the two sets of mounting frames 5 and threadedly connected to the two sets of mounting frames 5 respectively. An air inlet 27 is provided on the mounting frame 3. Filter frames 11 are embedded in both sets of mounting frames 5. Two sets of symmetrically distributed clamping frames 7 are slidably installed on the mounting frame 3. Two sets of symmetrically distributed movable frames 19 are slidably installed inside the mounting frame 3. Roller brushes 21 are rotatably installed on the movable frames 19. The roller brush 21 can be fitted to the filter frame 11. A scraper brush 22 is slidably mounted on the movable frame 19, and the scraper brush 22 is fitted to the roller brush 21. Two sets of slide frames 12 are slidably mounted inside the mounting frame 5. Insert rods 13 are fixedly mounted on each of the two sets of slide frames 12. The two sets of insert rods 13 are movably engaged with the corresponding filter frame 11. Two sets of clamping frames 7 are corresponding to the air inlet 27. Two sets of symmetrically distributed clamping slots 10 are opened on each of the two sets of clamping frames 7. Telescopic tubes 8 are provided between the two sets of clamping frames 7 and the mounting frame 3. The two sets of clamping frames 7 are movably engaged with the mounting frame 5 through the clamping slots 10. A bidirectional screw 9 is rotatably mounted on the mounting frame 3. The two ends of the bidirectional screw 9 pass through the two sets of clamping frames 7 and are threadedly connected to the two sets of clamping frames 7 respectively. Two sets of threaded rods 20 are rotatably mounted inside the mounting frame 3. Two sets of threaded rods 20 are respectively set with two sets of movable frames 19. The two sets of threaded rods 20 pass through the corresponding movable frames 19 and are threadedly connected to the corresponding movable frames 19. A slide rod 23 is fixedly installed on the movable frame 19. The scraper 22 is slidably sleeved with the slide rod 23 through the slider 25. A cam 26 is rotatably installed inside the movable frame 19. The cam 26 is fitted with the slider 25. Two sets of symmetrically distributed second springs 24 are sleeved on the slide rod 23. The two ends of the two sets of second springs 24 are fixedly connected to the slider 25 and the movable frame 19 respectively. The fan 4 in the protective cover 2 actively draws in the outside air to form forced convection heat dissipation, reducing the working temperature of the motor and electrical components of the trolley 1. When the airflow enters through the air inlet 27, dust and oil are intercepted by the filter frame 11. To ensure clean air entering the protective cover 2 and reduce the risk of explosion, the filter frame 11 is cleaned by a motor driven by the motor on the mounting frame 3 to rotate the lead screw 6, which in turn drives the two mounting frames 5 to switch and adjust the positions of the two filter frames 11. A new filter frame 11 is replaced at the air inlet 27 to optimize ventilation efficiency. Meanwhile, the roller brush 21 rotates and cleans the surface of the replaced filter frame 11 under the drive of the moving frame 19. The cam 26 driven by the motor on the moving frame 19 rotates, and the slider 25, the slide bar 23 and the second spring 24 make the scraper 22 slide up and down on the moving frame 19. The scraper 22 scrapes away the dirt adsorbed by the roller brush 21, realizing the self-cleaning of the filter frame 11 to wait for the next replacement and maintain long-term stable heat dissipation performance.

[0017] like Figure 3 , Figure 4 and Figure 5 As shown, each of the two sets of insert rods 13 is fitted with a first spring 14, and each of the two sets of slides 12 is fixedly mounted with a rack 15. A gear 16 is provided between the two sets of racks 15, and the gear 16 meshes with the two sets of racks 15 respectively. The gear 16 is rotatably connected to the mounting frame 5 through the mounting shaft 17. The two sets of slides 12 are centrally symmetrical about the mounting shaft 17. The two ends of the two sets of first springs 14 are fixedly connected to the insert rods 13 and the mounting frame 5 respectively. A torsion spring 18 is fitted on the mounting shaft 17, and the two ends of the torsion spring 18 are respectively connected to the mounting shaft 17. The mounting frame 5 is fixedly connected. When the filter frame 11 needs to be replaced or cleaned, the motor in the mounting frame 3 drives the bidirectional screw 9 to rotate, the two sets of retaining frames 7 disengage from the retaining slots 10, and the screw 6 is activated simultaneously to adjust the position of the two sets of mounting frames 5. The used filter frame 11 that needs to be replaced is adjusted to the side of the air inlet 27. The operator rotates the gear 16 to drive the rack 15 in linkage, so that the two sets of slides 12 slide to both sides simultaneously, so that the insert rod 13 on the slide 12 disengages from the filter frame 11, releasing the fixation, and the filter frame 11 can be slid out of the mounting frame 5. After replacement, the operation is reversed to relock. The whole process does not require complicated tools, ensuring convenient and efficient maintenance, while maintaining the sealing and explosion-proof performance of the protective cover 2.

[0018] This invention provides an explosion-proof bridge crane, the specific working principle of which is as follows: The fan 4 inside the protective cover 2 actively draws in external air, forming forced convection cooling to reduce the operating temperature of the motor and electrical components of the trolley 1. When the airflow enters through the air inlet 27, dust and oil are intercepted by the filter frame 11, ensuring the cleanliness of the air entering the protective cover 2 and reducing the risk of explosion. Simultaneously, after a set of filter frames 11 has been used for a period of time, the motor-driven screw 6 on the mounting frame 3 rotates, thereby driving the two sets of mounting frames 5 to switch and adjust the positions of the two sets of filter frames 11. A new filter frame 11 is then replaced at the air inlet 27 to optimize ventilation efficiency. Meanwhile, the roller brush 21, driven by the moving frame 19, rotates to clean the surface of the replaced filter frames 11 that are no longer in use. The motor on the moving frame 19 drives the cam 26 to rotate. The movement, in conjunction with the slider 25, the slide rod 23, and the second spring 24, causes the scraper 22 to slide back and forth on the moving frame 19. The scraper 22 simultaneously scrapes away the dirt adsorbed by the roller brush 21, achieving self-cleaning of the filter frame 11 before its next replacement, maintaining long-term stable heat dissipation performance. When the filter frame 11 needs to be replaced or cleaned, the motor in the mounting frame 3 drives the bidirectional screw 9 to rotate, disengaging the two sets of retaining frames 7 from the retaining slots 10. Simultaneously, the screw 6 is activated to adjust the position of the two sets of mounting frames 5, adjusting the used filter frame 11 to the side of the air inlet 27. The operator rotates the gear 16, driving the rack 15 in conjunction, causing the two sets of slides 12 to slide synchronously to both sides, disengaging the insert rod 13 on the slide 12 from the filter frame 11, releasing the fixation, and allowing the filter frame 11 to be slid out of the mounting frame 5. After replacement, the operation is reversed to relock. The entire process requires no complex tools, ensuring convenient and efficient maintenance while maintaining the sealing and explosion-proof performance of the protective cover 2.

[0019] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An explosion-proof bridge crane, comprising a trolley (1) and a protective cover (2), characterized in that: The protective cover (2) is fixedly installed on the trolley (1) by mechanical connectors. A fan (4) is fixedly embedded in the protective cover (2). A mounting frame (3) is fixedly installed on the protective cover (2). The mounting frame (3) is arranged correspondingly to the fan (4). Two sets of mounting frames (5) are slidably installed on the mounting frame (3). A screw (6) is rotatably installed on the mounting frame (3). The screw (6) passes through the two sets of mounting frames (5) and is threadedly connected to the two sets of mounting frames (5). An air inlet (27) is opened on the mounting frame (3). A filter frame (11) is embedded in both sets of mounting frames (5). (3) Two sets of symmetrically distributed card frames (7) are slidably installed on the upper part. Two sets of symmetrically distributed movable frames (19) are slidably installed inside the mounting frame (3). A roller brush (21) is rotatably installed on the movable frame (19). The roller brush (21) can be fitted with the filter frame (11). A scraper (22) is slidably installed on the movable frame (19). The scraper (22) is fitted with the roller brush (21). Two sets of slide frames (12) are slidably installed inside the mounting frame (5). A plug rod (13) is fixedly installed on each of the two sets of slide frames (12). The two sets of plug rods (13) are movably engaged with the corresponding filter frame (11).

2. The explosion-proof bridge crane according to claim 1, characterized in that: Both sets of the card frames (7) are set corresponding to the air inlet (27). Both sets of the mounting frames (5) are provided with two sets of symmetrically distributed card slots (10). Both sets of the card frames (7) and the mounting frame (3) are provided with telescopic tubes (8). Both sets of the card frames (7) are movably connected to the mounting frame (5) through the card slots (10). A bidirectional screw (9) is rotatably installed on the mounting frame (3). The two ends of the bidirectional screw (9) pass through the two sets of card frames (7) respectively and are threadedly connected to the two sets of card frames (7) respectively.

3. The explosion-proof bridge crane according to claim 1, characterized in that: Two sets of threaded rods (20) are rotatably installed inside the mounting bracket (3). The two sets of threaded rods (20) are respectively set to correspond to the two sets of movable brackets (19). The two sets of threaded rods (20) pass through the corresponding movable brackets (19) and are threadedly connected to the corresponding movable brackets (19).

4. The explosion-proof bridge crane according to claim 1, characterized in that: A slide rod (23) is fixedly installed on the movable frame (19). The scraper (22) is slidably connected to the slide rod (23) through a slider (25). A cam (26) is rotatably installed inside the movable frame (19). The cam (26) is fitted to the slider (25).

5. The explosion-proof bridge crane according to claim 4, characterized in that: Two sets of symmetrically distributed second springs (24) are sleeved on the slide bar (23), and the two ends of the two sets of second springs (24) are fixedly connected to the slider (25) and the moving frame (19) respectively.

6. The explosion-proof bridge crane according to claim 1, characterized in that: Both sets of insert rods (13) are fitted with a first spring (14), and both sets of slides (12) are fixedly mounted with racks (15). A gear (16) is provided between the two sets of racks (15). The gear (16) meshes with the two sets of racks (15) respectively. The gear (16) is rotatably connected to the mounting frame (5) through the mounting shaft (17). The two sets of slides (12) are centrally symmetrical about the mounting shaft (17).

7. An explosion-proof bridge crane according to claim 6, characterized in that: The two ends of the first springs (14) are fixedly connected to the insert rod (13) and the mounting frame (5) respectively. A torsion spring (18) is sleeved on the mounting shaft (17). The two ends of the torsion spring (18) are fixedly connected to the mounting shaft (17) and the mounting frame (5) respectively.

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