Safety guard for a bridge and portal crane

Abstract

The utility model is suitable for the crane protection technical field provides a kind of safety protection device of bridge portal crane, include: bridge portal crane ontology, the top of bridge portal crane ontology is equipped with heat dissipation mechanism, the side of bridge portal crane ontology is equipped with protection monitoring mechanism;The safety protection device of this bridge portal crane is synchronized to realize operating state monitoring and abnormal early warning function by setting protection monitoring mechanism, makes bridge portal crane ontology in the process of along guide rail moving hoist, and hoist moves and drives connecting plate, connecting rod and support plate whole linkage, spring rod in the inside of support plate makes clean wiping board under the action of elasticity continuously stick to the outside of guide rail, the dust, oil stain and impurity adhered to the surface of guide rail are cleaned in real time, effectively avoid hoist running block, shaking or jamming phenomenon due to foreign matter accumulation, improve the stability and reliability of hoist along guide rail running.

Description

Technical Field

[0001] This utility model belongs to the field of crane protection technology, and in particular relates to a safety protection device for bridge and gantry cranes. Background Technology

[0002] Bridge cranes are a type of lifting equipment widely used in factories, warehouses, ports, and large component loading and unloading sites. They typically complete the lifting, translation, and positioning of materials by reciprocating along guide rails with a lifting device. Their operational stability and safety are directly related to operational efficiency and personnel safety.

[0003] However, some problems still exist in the above solutions: The body of bridge and gantry cranes is often in working conditions with high dust, complex environment or continuous high load. Dust, oil and metal shavings and other impurities are easily attached to the surface of the guide rails. After long-term accumulation, the crane may cause the crane to run in a sluggish, shaking or deviating, which will increase the risk of mechanical wear and safety accidents. At the same time, the existing equipment relies on manual periodic maintenance for guide rail cleaning, which has problems such as untimely cleaning, high downtime costs and insufficient safety. In addition, when bridge cranes are used for a long time or are affected by external impacts, foundation settlement and other factors, the guide rails may experience local deformation or installation deviations. The existing technology for monitoring guide rail deformation is mostly manual inspection or simple limiting structures, which makes it difficult to provide timely and intuitive early warning of abnormal conditions. This can easily lead to the crane continuing to operate under abnormal guide rail conditions, thereby causing serious safety hazards such as derailment, tilting or even falling, posing a great risk to the safety of equipment and personnel. On the other hand, the crane generates a lot of heat during frequent start-stop and high-power operation. If the heat dissipation is insufficient, the temperature of related electrical components may rise too high, which will affect their working stability and service life. The existing bridge cranes have relatively simple structures for heat dissipation of the crane, and the heat dissipation efficiency is limited, which is difficult to meet the needs of long-term continuous operation. Utility Model Content

[0004] This utility model provides a safety protection device for bridge gantry cranes, which aims to solve the problems mentioned in the background art.

[0005] This utility model is implemented as follows: a safety protection device for a bridge crane includes: a bridge crane body, a heat dissipation mechanism on the top of the bridge crane body, and a protection monitoring mechanism on one side of the bridge crane body. The protective monitoring mechanism includes support rods, spring sleeves, ball bearings, fixing plates, trigger rods, and push-button trigger switches. One end of each of the two support rods is slidably connected to a spring sleeve, one end of each of the two spring sleeves is rotatably connected to a ball bearing, the top of each of the two spring sleeves is fixedly connected to a fixing plate, and the inner side of each of the two fixing plates is fixedly connected to a trigger rod. One end of each of the two trigger rods is placed on one side of each of the two push-button trigger switches. The heat dissipation mechanism includes a heat-conducting plate, a heat-conducting pipe, and heat dissipation fins. The top of the heat-conducting plate is fixedly connected to the heat dissipation fins, the middle of the heat-conducting pipe passes through the heat dissipation fins, and the bottom of the heat-conducting pipe is fixedly connected to the top of the heat-conducting plate.

[0006] Preferably, a guide rail is fixedly connected to the top of the bridge crane body, and a lifting device is slidably connected to the outside of the guide rail.

[0007] Preferably, connecting plates are fixedly connected to both sides of the lifting device, connecting rods are fixedly connected to the outer side of the connecting plates, and a support plate is fixedly connected to the bottom end of the connecting rods.

[0008] Preferably, a spring rod is fixedly connected to the inner side of the support plate, and a cleaning wiper is fixedly connected to the free end of the spring rod, with the inner side of the cleaning wiper fitting against the outer side of the guide rail.

[0009] Preferably, the two push-button trigger switches are fixedly connected to the inner walls of the support plate on both sides, and an audible and visual alarm is fixedly connected to the outer side of the connecting plate. The audible and visual alarm is electrically connected to the push-button trigger switches.

[0010] Preferably, the two balls are respectively attached to the two side walls of the guide rail, and the other ends of the two support rods are respectively fixedly connected to the two sides of the outer wall of the support plate.

[0011] Preferably, the top end of the hoist is fixedly connected to the bottom end of the heat-conducting plate, the top end of the heat dissipation fins is fixedly connected to a mounting bracket, and a cooling fan is fixedly connected to the inner side of the mounting bracket.

[0012] Compared with related technologies, the safety protection device for bridge gantry cranes provided by this utility model has the following beneficial effects: 1. The safety protection device of this bridge gantry crane, through the installation of a protective monitoring mechanism, enables the bridge gantry crane body to simultaneously monitor its operating status and provide abnormal early warning functions as the crane moves along the guide rail. When the crane moves, it drives the connecting plate, connecting rod, and support plate to move together. The spring rod on the inner side of the support plate keeps the cleaning wiper plate in continuous contact with the outer side of the guide rail under the elastic action, cleaning the dust, oil, and impurities attached to the guide rail surface in real time. This effectively avoids the phenomenon of crane operation obstruction, shaking, or jamming caused by the accumulation of foreign objects, improves the stability and reliability of the crane running along the guide rail, reduces the frequency of manual shutdown for cleaning, lowers maintenance costs, and extends the service life of the guide rail and crane while ensuring the cleanliness of the guide rail. From a structural perspective, it reduces the probability of safety accidents caused by guide rail contamination.

[0013] 2. By incorporating support rods, spring sleeves, ball bearings, a fixed plate, a trigger rod, and a push-button trigger switch into the protective monitoring mechanism, the device acquires the ability to passively sense and immediately alarm the deformation state of the guide rail. When the guide rail bends or undergoes local deformation, the outer side of the guide rail compresses the ball bearings. The ball bearings drive the spring sleeve to move along the support rod, which in turn causes the fixed plate and trigger rod to displace and trigger the push-button trigger switch. This allows the audible and visual alarm to promptly issue a warning signal, reminding operators to detect the abnormality and take appropriate measures. This prevents the crane from continuing to operate under abnormal guide rail conditions, which could lead to derailment or overturning risks. This mechanical trigger monitoring method has a simple and reliable structure, does not rely on complex detection components, and provides a direct response, which helps to improve the overall safety protection level of the gantry crane during operation.

[0014] 3. This device, by incorporating a heat dissipation mechanism and structurally connecting it to the crane, ensures stable and efficient heat dissipation for the crane during prolonged, high-frequency operation. The heat generated by the crane is rapidly conducted to the heat pipes via the heat-conducting plate and diffused through the heat dissipation fins. Simultaneously, the cooling fan within the mounting bracket forms an active airflow, accelerating heat exchange efficiency and effectively preventing performance degradation, accelerated aging, or failure of the crane and related electrical components due to excessive temperature rise. This ensures the continuity and stability of the crane's operation, reduces operational interruptions caused by overheating shutdowns, and comprehensively enhances the overall performance of the bridge crane in terms of safety, reliability, and service life through the coordinated design of the heat dissipation mechanism and the protective monitoring mechanism. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the external structure of this utility model; Figure 3 This is a schematic diagram of the mounting bracket portion of this utility model; Figure 4This is a structural schematic diagram of the connecting plate portion of this utility model; Figure 5 For the present utility model Figure 4 Enlarged view of point A in the middle.

[0016] In the diagram: 1. Bridge crane body; 2. Guide rail; 3. Lifter; 4. Heat dissipation mechanism; 401. Mounting bracket; 402. Cooling fan; 403. Heat dissipation fins; 404. Heat pipe; 405. Heat conduction plate; 5. Protection and monitoring mechanism; 501. Audible and visual alarm; 502. Connecting plate; 503. Connecting rod; 504. Support plate; 505. Push-button trigger switch; 506. Spring rod; 507. Support rod; 508. Fixing plate; 509. Trigger rod; 510. Spring sleeve; 511. Ball bearing; 512. Cleaning wiper plate. Detailed Implementation

[0017] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, not to describe a particular order.

[0018] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0019] Example 1 A preferred embodiment of the safety protection device for a bridge crane provided by this utility model is, for example... Figures 1 to 5 As shown: A safety protection device for a bridge crane includes: a bridge crane body 1, a heat dissipation mechanism 4 on the top of the bridge crane body 1, and a protection monitoring mechanism 5 on one side of the bridge crane body 1. The protective monitoring mechanism 5 includes a support rod 507, a spring sleeve 510, a ball bearing 511, a fixing plate 508, a trigger rod 509, and a push-button trigger switch 505. One end of each of the two support rods 507 is slidably connected to a spring sleeve 510, and one end of each of the two spring sleeves 510 is rotatably connected to a ball bearing 511. The top of each of the two spring sleeves 510 is fixedly connected to a fixing plate 508, and the inner side of each of the two fixing plates 508 is fixedly connected to a trigger rod 509. One end of each of the two trigger rods 509 is placed on one side of each of the two push-button trigger switches 505. The heat dissipation mechanism 4 includes a heat-conducting plate 405, a heat-conducting pipe 404, and heat dissipation fins 403. The heat dissipation fins 403 are fixedly connected to the top of the heat-conducting plate 405, the heat dissipation fins 403 are penetrated through the middle of the heat-conducting pipe 404, and the bottom of the heat-conducting pipe 404 is fixedly connected to the top of the heat-conducting plate 405.

[0020] In this embodiment, the safety protection device of the gantry crane uses the gantry crane body 1 as the bearing and operating foundation during operation. By setting a heat dissipation mechanism 4 on the top of the gantry crane body 1, a heat dissipation path is formed when the equipment generates heat during operation, which is conducted from the heat conduction plate 405 to the heat conduction pipe 404 and then to the heat dissipation fins 403. At the same time, a protective monitoring mechanism 5 is set on one side of the gantry crane body 1. During the lifting operation, the support rod 507 guides the spring sleeve 510, so that the ball 511 keeps in contact with the external structure. When the operating state changes, the mechanical displacement can be transmitted step by step to the trigger rod 509 and the push-type trigger switch 505 to realize the linkage monitoring and feedback of the safety state.

[0021] In a further preferred embodiment of the present invention, a guide rail 2 is fixedly connected to the top of the bridge crane body 1, and a hoist 3 is slidably connected to the outer side of the guide rail 2.

[0022] In this embodiment, a guide rail 2 is provided at the top of the gantry crane body 1, and the hoist 3 is slidably connected to the outside of the guide rail 2. During the lifting operation, the hoist 3 moves smoothly along the direction of the guide rail 2 under the driving action. The guide rail 2 limits and guides the running path of the hoist 3, so that the hoist 3 maintains a stable posture when carrying the load. At the same time, it provides continuous and regular movement conditions for the protection and monitoring mechanism 5 and the cleaning structure that are linked with the hoist 3, thereby ensuring that the entire safety protection device continues to play a role during the reciprocating movement of the hoist 3.

[0023] In a further preferred embodiment of the present invention, connecting plates 502 are fixedly connected to both sides of the lifting device 3, connecting rods 503 are fixedly connected to the outer side of the connecting plates 502, and a support plate 504 is fixedly connected to the bottom end of the connecting rods 503.

[0024] In this embodiment, when the hoist 3 runs along the guide rail 2, the connecting plates 502 fixedly connected to its two side walls move synchronously with the hoist 3. During the movement, the connecting rod 503 on the outer side of the connecting plate 502 transmits the linear displacement of the hoist 3 to the support plate 504 at the bottom of the connecting rod 503, so that the support plate 504 maintains a consistent movement state in the direction of movement of the hoist 3. This transforms the operation of the hoist 3 into the synchronous displacement of the support plate 504, providing a stable drive source for the relevant functional components set on the support plate 504, avoiding the introduction of additional power structures, and improving the overall coordination of the structure's operation.

[0025] In a further preferred embodiment of the present invention, a spring rod 506 is fixedly connected to the inner side of the support plate 504, and a cleaning wipe plate 512 is fixedly connected to the free end of the spring rod 506. The inner side of the cleaning wipe plate 512 is attached to the outer side of the guide rail 2.

[0026] In this embodiment, as the support plate 504 moves with the hoist 3, the spring rod 506 fixedly connected to its inner side continuously applies force to the guide rail 2 under elastic action, so that the cleaning wipe plate 512 fixedly connected to the free end of the spring rod 506 always adheres to the outer surface of the guide rail 2. When the hoist 3 runs along the guide rail 2, the cleaning wipe plate 512 slides relative to it, and synchronously scrapes and cleans the surface of the guide rail 2. Thus, the surface of the guide rail 2 is cleaned in real time without affecting the operation of the hoist 3, and the buffering effect of the spring rod 506 avoids excessive friction between the cleaning wipe plate 512 and the guide rail 2.

[0027] In a further preferred embodiment of the present invention, two push-button trigger switches 505 are respectively fixedly connected to the inner walls of the support plate 504, and an audible and visual alarm 501 is fixedly connected to the outer side of the connecting plate 502. The audible and visual alarm 501 is electrically connected to the push-button trigger switches 505.

[0028] In this embodiment, the push-button trigger switch 505 is fixedly connected to both sides of the inner wall of the support plate 504, so that it corresponds to the trigger rod 509 in the protection and monitoring mechanism 5. When the protection and monitoring mechanism 5 is displaced and pushes the trigger rod 509, pressure can be directly applied to the push-button trigger switch 505. After being triggered, the push-button trigger switch 505 transmits the signal to the audible and visual alarm 501 through an electrical connection, so that the audible and visual alarm 501 will issue an audible and visual prompt in time when an abnormal state occurs, thereby converting the mechanical monitoring results into intuitive warning information and reminding the operator to pay attention to the equipment operating status.

[0029] In a further preferred embodiment of the present invention, two balls 511 are respectively attached to the two side walls of the guide rail 2, and the other ends of the two support rods 507 are respectively fixedly connected to the two sides of the outer wall of the support plate 504.

[0030] In this embodiment, two balls 511 are respectively attached to the two side walls of the guide rail 2. When the hoist 3 is running normally, the balls 511 roll along the surface of the guide rail 2 to reduce frictional resistance. When the guide rail 2 is deformed or deviated, the side wall of the guide rail 2 exerts a squeezing effect on the balls 511. After being subjected to force, the balls 511 transmit the displacement to the spring sleeve 510 connected to them. The spring sleeve 510 moves axially under the guidance of the support rod 507, so that the protection monitoring mechanism 5 can make a mechanical response to the geometric state change of the guide rail 2 and improve the sensitivity of anomaly identification.

[0031] Example 2 Based on Embodiment 1, a preferred embodiment of the safety protection device for a bridge crane provided by this utility model is, for example... Figures 1 to 3 As shown: the top end of the lifting device 3 is fixedly connected to the bottom end of the heat conduction plate 405, the top end of the heat dissipation fin 403 is fixedly connected to the mounting bracket 401, and the inner side of the mounting bracket 401 is fixedly connected to the cooling fan 402.

[0032] In this embodiment, the top end of the hoist 3 is fixedly connected to the bottom end of the heat-conducting plate 405, so that the heat generated by the hoist 3 during operation can be directly conducted to the heat-conducting plate 405 and then transported upward to the heat dissipation fins 403 through the heat-conducting pipe 404. While the heat dissipation area of ​​the heat dissipation fins 403 is expanded, the cooling fan 402 in the bracket 401 at the top of the fins forms a directional airflow during operation, which accelerates the removal of heat from the surface of the heat dissipation fins 403, thereby maintaining a stable working temperature during continuous operation of the hoist 3 and ensuring the long-term reliable operation of the safety protection device.

[0033] In summary, the safety protection device of this gantry crane uses the gantry crane body 1 as the overall load-bearing foundation during use. After the lifting operation is started, the hoist 3 moves back and forth along the top of the gantry crane body 1 under the guidance of the guide rail 2. During the movement of the hoist 3, the connecting plates 502 fixedly connected to both sides move synchronously, and the connecting rods 503 on the outer side of the connecting plates 502 are displaced accordingly, thereby driving the support plate 504 fixedly connected to the bottom of the connecting rods 503 to move as a whole. During the movement, the support plate 504 applies spring force to the guide rail 2 through the spring rod 506 fixedly connected to its inner side. The spring rod 506 is subjected to a force that keeps the cleaning plate 512, which is fixedly connected to the free end of the spring rod 506, in constant contact with the outer surface of the guide rail 2. When the hoist 3 is running continuously, the cleaning plate 512 scrapes and cleans the dust, oil and impurities attached to the outer surface of the guide rail 2, ensuring that the surface of the guide rail 2 is clean and preventing the hoist 3 from being blocked, jumping or deviating due to the accumulation of foreign objects, thereby reducing safety hazards during operation. When the hoist 3 stops or changes direction, the spring rod 506 achieves buffer reset under its own elasticity, ensuring that the cleaning plate 512 and the guide rail 2 maintain stable contact without excessive wear. While the hoist 3 moves and performs its cleaning function, the protective monitoring mechanism 5 continuously monitors the operating status of the guide rail 2. When the guide rail 2 is in a normal state, the balls 511 attached to the two side walls of the guide rail 2 roll smoothly on the surface of the guide rail 2. The balls 511 reduce the frictional resistance between themselves and the guide rail 2 by rotating, keeping the spring sleeve 510 in its initial equilibrium position. The fixed plate 508 fixedly connected to the top of the spring sleeve 510 is in a stable state. The trigger rod 509 on the inner side of the fixed plate 508 is spaced apart from the push-button trigger switch 505 and does not contact it. At this time, the audible and visual alarm 501 does not work and does not affect the normal operation of the hoist 3. When the guide rail 2 bends, deforms, or bulges locally due to long-term use or external force, the outer side wall of the guide rail 2 will exert a squeezing force on the attached balls 511. The balls 511 are pushed backward against the support rod 507. The spring sleeve 510, which is rotatably connected to the spring sleeve 510, slides along the support rod 507. During the sliding process, the spring sleeve 510 compresses its internal elastic structure and pushes the fixed plate 508, which is fixedly connected to its top, to move. After the fixed plate 508 moves, it drives the trigger rod 509, which is fixedly connected to its inner side, to move towards the push-type trigger switch 505. When the trigger rod 509 contacts the push-type trigger switch 505 and applies pressure, the push-type trigger switch 505 is triggered and outputs an electrical signal. This electrical signal is transmitted to the audible and visual alarm 501 through an electrical connection, causing the audible and visual alarm 501 to immediately emit a sound and flashing light, thereby reminding the operator that there is an abnormal condition in the guide rail 2. This facilitates timely maintenance or shutdown measures and prevents the hoist 3 from continuing to operate under abnormal guide rail 2 conditions, which could lead to safety accidents such as derailment, tilting, or falling. Meanwhile, the heat dissipation mechanism 4 effectively dissipates the heat generated by the crane 3 during operation. The top of the crane 3 is fixedly connected to the bottom of the heat-conducting plate 405. The heat generated by the crane 3 during operation is conducted to the heat-conducting plate 405 through contact, and then transferred by the heat-conducting plate 405 to the heat-conducting pipe 404 fixedly connected to it. The heat dissipation fins 403 pass through the middle of the heat-conducting pipe 404, so that the heat can be quickly diffused to the surface of the heat dissipation fins 403 along the heat-conducting pipe 404. The heat dissipation fins 403 achieve natural heat dissipation by increasing the heat dissipation area. At the same time, the cooling fan 402 installed in the mounting bracket 401 fixedly connected to its top forms a forced airflow after being powered on, which accelerates the air flow around the heat dissipation fins 403, thereby quickly removing the heat and preventing the performance of the crane 3 and related electrical components from deteriorating or failing due to excessive temperature. Through the synergistic effect of the heat dissipation mechanism 4 and the protection monitoring mechanism 5, the bridge gantry crane has both good operational stability and safety protection performance during long-term continuous operation, improving the overall safety and reliability of use.

[0034] It is worth noting that the circuits, electronic components, and modules involved in this utility model are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this utility model does not involve any improvement to the software and methods.

[0035] It should be understood that the disclosed apparatus can be implemented in other ways, given the several embodiments provided in this application. For example, the apparatus embodiments described above are merely illustrative; the division of units described above is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or communication connections shown or discussed may be through some interfaces; the indirect coupling or communication connections between devices or units may be telecommunications or other forms.

[0036] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Although this utility model has been described in detail with reference to the above embodiments, those skilled in the art can still combine, add, delete, or otherwise adjust the features of the various embodiments of this utility model according to the circumstances without conflict or creative effort, thereby obtaining different technical solutions that do not fundamentally depart from the concept of this utility model. These technical solutions are also within the scope of protection of this utility model.

Claims

1. A safety protection device for a bridge crane, characterized in that, include: The bridge gantry crane body (1) is provided with a heat dissipation mechanism (4) on the top of the bridge gantry crane body (1) and a protective monitoring mechanism (5) on one side of the bridge gantry crane body (1). The protective monitoring mechanism (5) includes a support rod (507), a spring sleeve (510), a ball bearing (511), a fixing plate (508), a trigger rod (509), and a push-button trigger switch (505). One end of each of the two support rods (507) is slidably connected to a spring sleeve (510), and one end of each of the two spring sleeves (510) is rotatably connected to a ball bearing (511). The top ends of each of the two spring sleeves (510) are fixedly connected to a fixing plate (508), and the inner sides of each of the two fixing plates (508) are fixedly connected to a trigger rod (509). One end of each of the two trigger rods (509) is placed on one side of each of the two push-button trigger switches (505). The heat dissipation mechanism (4) includes a heat-conducting plate (405), a heat-conducting pipe (404), and heat dissipation fins (403). The top end of the heat-conducting plate (405) is fixedly connected to the heat dissipation fins (403), the middle part of the heat-conducting pipe (404) passes through the heat dissipation fins (403), and the bottom end of the heat-conducting pipe (404) is fixedly connected to the top end of the heat-conducting plate (405).

2. The safety protection device for bridge cranes as described in claim 1, characterized in that, The top of the bridge gantry crane body (1) is fixedly connected to a guide rail (2), and a hoist (3) is slidably connected to the outside of the guide rail (2).

3. The safety protection device for bridge gantry cranes as described in claim 2, characterized in that, The lifting device (3) has connecting plates (502) fixedly connected to both sides of the lifting device (3). Connecting rods (503) are fixedly connected to the outer side of the connecting plates (502). Support plates (504) are fixedly connected to the bottom end of the connecting rods (503).

4. The safety protection device for bridge cranes as described in claim 3, characterized in that, A spring rod (506) is fixedly connected to the inner side of the support plate (504), and a cleaning wiper (512) is fixedly connected to the free end of the spring rod (506). The inner side of the cleaning wiper (512) is attached to the outer side of the guide rail (2).

5. The safety protection device for bridge cranes as described in claim 4, characterized in that, The two push-button trigger switches (505) are respectively fixedly connected to the inner walls of the support plate (504). The outer side of the connecting plate (502) is fixedly connected to the sound and light alarm (501), and the sound and light alarm (501) is electrically connected to the push-button trigger switch (505).

6. The safety protection device for bridge cranes as described in claim 5, characterized in that, The two balls (511) are respectively attached to the two side walls of the guide rail (2), and the other ends of the two support rods (507) are respectively fixedly connected to the two sides of the outer wall of the support plate (504).

7. The safety protection device for a bridge crane as described in claim 6, characterized in that, The top end of the lifting device (3) is fixedly connected to the bottom end of the heat-conducting plate (405), and the top end of the heat dissipation fin (403) is fixedly connected to the mounting bracket (401). The inner side of the mounting bracket (401) is fixedly connected to the cooling fan (402).

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