Fireproof door electric heavy load conveying platform with automatic bending function and using method

Abstract

The invention discloses a fireproof door electric heavy-load conveying platform with an automatic bending function and a using method, and relates to the technical field of heavy-load conveying equipment.The fireproof door electric heavy-load conveying platform comprises a conveying platform body, an automatic bending mechanism and a safety protection device.The automatic bending mechanism is fixedly installed at the bottom end of the outer wall of the conveying platform body; the conveying platform body is arranged to be in a three-section type, and a safety protection device is arranged in the automatic bending mechanism. By means of the automatic bending mechanism, the bending section of the conveying platform body is bent downwards by 90 degrees and reset, the problem that the structure of a traditional conveying platform cannot be flexibly adjusted to meet the lifting requirement of the fireproof door is solved, and the adaptability of the conveying platform to conveying of the fireproof door is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of heavy-load conveying equipment, and in particular to an electric heavy-load conveying platform for fire doors with an automatic bending function and a use method thereof. Background Art

[0002] The continuous progress of automation control technology has provided technical support for the electric heavy-load conveying platform for fire doors. Through PLC control systems, sensors and other equipment, the conveying platform can be operated automatically, and the conveying speed, position and other parameters can be accurately controlled to improve the accuracy and stability of the conveying.

[0003] In modern industrial production and logistics transportation, conveying platforms are widely used for material handling and transmission. However, in some special places, such as warehouses and workshops, fire doors are usually installed to meet fire safety requirements. When encountering fire doors, traditional conveying platforms often need to interrupt the conveying process or adopt complex detour designs, which not only affects the conveying efficiency, but also increases the floor space and cost of the equipment.

[0004] Therefore, it is very necessary for the present application to propose an electric heavy-load conveying platform for fire doors with automatic bending function and a method of use to solve the problems in the background.

[0005] 1. Patent document CN106404570B discloses a device and method for monitoring friction fatigue of a heavy-loaded scraper conveyor sprocket under vibration impact. The above patent simulates the friction fatigue fracture behavior of the heavy-loaded scraper conveyor sprocket in a working environment and can monitor the fatigue damage and wear of the sprocket.

[0006] 2. Patent document CN106289759B discloses a friction corrosion fatigue test device and method for the round link chain of a heavy-loaded scraper conveyor. The above patent realizes the monitoring of dynamic tension, friction, impact load, temperature, corrosion wear rate and fatigue life of the round link chain. It is easy to operate and the measurement results are comprehensive and reliable. It has important guiding significance for the safe and reliable operation of the round link chain of heavy-loaded scraper conveyors in complex operating environments.

[0007] 3. Patent document CN108820920B discloses a suction-type heavy-duty robot for bulk material loading and unloading and a loading and unloading method thereof. The above patent realizes the direct suction of bulk materials through a suction mechanism, puts the bulk materials into a suction box for storage, and discharges the materials at a later stage by opening the discharge door, thereby facilitating the rapid transportation of bulk materials.

[0008] 4. Patent document CN114228188B discloses a PVC pipe welding device with a bending function. The above patent prevents the right part of the PVC pipe from bending during the bending of the left part, thereby avoiding the phenomenon that the bending angle is lower than a preset value.

[0009] In summary, inspired by the above patents, this application has discovered a technical solution that can realize the bending section of the conveying platform body bending downward to 90 degrees and resetting, accurate bending of the conveying platform, protective actuators and multi-functional collaborative functions, which results in the inability of the traditional conveying platform to flexibly adjust the structure to meet the lifting requirements of the fire door, the poor movement accuracy of the conveying platform during the bending process, and the safety hazard caused by the inability of the equipment to stop running in time when an abnormality occurs; To this end, the present application proposes an electric heavy-load conveying platform for fire doors with automatic bending function and a method of use, which can realize the bending section of the conveying platform body bending downward to 90 degrees and resetting, accurate bending of the conveying platform, protective actuator and multi-functional collaborative function. Summary of the invention

[0010] The purpose of the present invention is to provide an electric heavy-load conveying platform for fire doors with automatic bending function and a method of use, so as to solve the technical problems of safety hazards proposed in the above background technology that the traditional conveying platform cannot flexibly adjust the structure to adapt to the lifting requirements of the fire doors, the conveying platform has poor movement accuracy during the bending process, and the equipment cannot stop running in time when an abnormality occurs.

[0011] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an electric heavy-load conveying platform for fire doors with an automatic bending function, comprising a conveying platform body, an automatic bending mechanism and a safety protection device, wherein the automatic bending mechanism is fixedly installed at the bottom end of the outer wall of the conveying platform body, the conveying platform body is configured as a three-section type, and a safety protection device is arranged inside the automatic bending mechanism; The automatic bending mechanism includes an articulated arm, an articulated shaft and a tapered roller bearing, one end of the articulated arm is connected to a guide mechanism, the other end of the articulated arm is movably connected to the articulated shaft, both ends of the articulated shaft are mounted on the outer wall of a fixed seat through tapered roller bearings, the articulated shaft passes through both ends of the articulated arm, the tail end of the articulated shaft is welded to the fixed end of the conveying platform body, retaining rings are fixedly mounted on both ends of the outer wall of the articulated shaft, and the outer ring of the tapered roller bearing is interference fit with the mounting hole of the articulated arm.

[0012] Preferably, the conveying platform body is composed of a roller unit, bearing seats are fixedly installed at both ends of the outer wall of the roller unit, and shaft shoulders are fixedly installed on the outer wall of the bearing seat; Load-bearing frames are fixedly installed on both sides of the outer wall of the conveying platform body, hydraulic support feet are fixedly installed on the side of the outer wall of the load-bearing frame, gaskets are welded and installed on the bottom end of the outer wall of the hydraulic support feet, and ground bolts are screwed into the embedded parts on the ground through the mounting holes opened on the gaskets, and fixed seats are fixedly installed on the side of the outer wall of the load-bearing frame.

[0013] Preferably, the safety protection device includes a stop pin, a stop pin is fixedly installed on the bottom end of the outer wall of the articulated arm, a limiting groove is arranged on the side of the outer wall of the load-bearing frame, and the stop pin contacts the edge of the limiting groove.

[0014] Preferably, a flywheel is fixedly mounted on the outer wall of the joint shaft, and the three sections of the conveying platform body are respectively a starting section, a bending section and an output section.

[0015] Preferably, a guide mechanism is fixedly installed at the tail end of the articulated arm, a reinforcing rib is fixedly installed at the top of the outer wall of the guide mechanism, an adjusting knob is fixedly installed on the side of the outer wall of the reinforcing rib, and the guide mechanism is connected to the actuator through a coupling; The actuator includes a connecting rod and a hydraulic cylinder. The hydraulic cylinder is connected to the connecting rod through a transmission rod. A braking point is arranged inside the hydraulic cylinder to lock the piston. The actuator is connected to the articulated arm through a coupling.

[0016] Preferably, the roller units are installed on the same horizontal plane, the roller units are driven by chains, a transmission ring is fixedly installed on the side of the inner wall of the load-bearing frame, a photoelectric probe runs through the middle of the transmission ring, and the photoelectric probe is connected to the master control box through a cable.

[0017] Preferably, a crossbeam is fixedly installed on the side of the outer wall of the hydraulic support foot, a guardrail is fixedly installed on the top of the outer wall of the hydraulic support foot, an angle sensor is fixedly installed on one end of the side of the outer wall of the guardrail, a mechanical latch is fixedly installed on the side of the outer wall of the angle sensor, and a slot is opened in the bending section of the conveying platform body; The angle sensor is connected to the bus of the photoelectric probe via a data line.

[0018] Preferably, the guide mechanism includes a slider, a guide rail and a pin, the guide rail is fixedly installed at the bottom end of the outer wall of the slider, the pin is fixedly installed at the front end of the outer wall of the guide rail, an encoder is fixedly installed on the side of the outer wall of the joint shaft, and the encoder is connected to the photoelectric probe through a data line; A transmission block is fixedly installed on the side of the outer wall of the guide rail, a single drive component is fixedly installed on the side of the outer wall of the transmission block, a connecting rod is fixedly installed on the side of the outer wall of the single drive component, and a hinge support is fixedly installed on the bottom end of the outer wall of the connecting rod.

[0019] Preferably, the method of use comprises the following steps: S1, turn on the power, start the master control box, turn on the roller unit drive motor, the master control box receives the fire door opening signal, and controls the actuator to move; S2, the hydraulic cylinder pushes the connecting rod through the transmission rod, driving the slider of the guide mechanism to move on the guide rail, and the pin assists in positioning; S3, the articulated arm rotates around the articulated shaft under the action of the guide mechanism and the articulated shaft, so that the bending section of the conveying platform body is bent downward to 90 degrees, and the flywheel assists the articulated shaft to rotate; S4, the angle sensor monitors the angle change of the bending section of the conveying platform body. When it reaches 90 degrees, the signal is transmitted to the photoelectric probe through the data line and fed back to the master control box to ensure that the bending is in place.

[0020] Preferably, the method of use further comprises the following steps: S11. Place the main body of the conveying platform through the hydraulic support feet on the side of the load-bearing frame, use the mounting holes on the gaskets, and screw them into the embedded parts on the ground with anchor bolts; S12, confirm that the conveying platform body is in a horizontal state, the roller units are on the same horizontal plane, the mechanical latch is not inserted into the slot of the bending section of the conveying platform body, and the main control box controls the actuator to move in the reverse direction during the rising process of the fire door; S13, when the articulated arm rotates to 90 degrees, the stop pin falls into the limit slot, limiting the articulated arm from further rotating; S14, the hydraulic cylinder retracts, and the connecting rod drives the guide mechanism to rotate the joint arm in the opposite direction, and the bending section of the conveying platform body gradually rises; S15, the encoder and angle sensor continuously monitor the angle. When the bending section of the conveying platform body rises to the same level as the starting section and the output section, the master control box controls the actuator to stop the action; S21, the hydraulic cylinder in the actuator drives the connecting rod through the transmission rod, and the connecting rod drives the articulated arm to rotate around the articulated axis; S22, the roller unit drives the fire door to move on the conveying platform body through chain transmission, and when the articulated arm rotates, the stop pin contacts the edge of the limit groove; S41, the angle sensor and photoelectric probe detect anomalies, the master control chassis control equipment stops running, emergency braking, the internal braking point of the hydraulic cylinder locks the piston, and the actuator stops moving.

[0021] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention realizes the bending section of the conveying platform body to bend downward to 90 degrees and reset through the automatic bending mechanism, which solves the problem that the traditional conveying platform cannot flexibly adjust the structure to meet the lifting requirements of the fire door, and improves the adaptability of the conveying platform to the transportation of fire doors; 2. The present invention realizes accurate bending of the conveying platform through the guide mechanism, solves the problem of poor movement accuracy of the conveying platform during the bending process, and improves the operating reliability of the equipment; 3. The present invention realizes the protection of the actuator through the stop pin and the limit groove, solves the potential safety hazard caused by the failure of the equipment to stop running in time when an abnormality occurs, and effectively protects the key components of the equipment; 4. The present invention realizes multi-functional coordination through the three-section conveying platform body, solves the problem of poor stability of the conveying platform, makes the fire door more stable during the conveying process, and improves the conveying efficiency and safety of the fire door. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a front view structural schematic diagram of the present invention; Figure 2 It is a schematic diagram of the structure of the automatic bending mechanism of the present invention; Figure 3 It is a schematic diagram of the main structure of the conveying platform of the present invention; Figure 4 It is a front structural schematic diagram of the present invention; Figure 5 It is a schematic diagram of the structure of the safety protection device of the present invention.

[0023] In the figure: 1. automatic bending mechanism; 2. conveying platform body; 3. roller unit; 4. articulated arm; 5. hydraulic support foot; 6. reinforcing ribs; 7. articulated shaft; 8. retaining ring; 9. load-bearing frame; 10. gasket; 11. tapered roller bearing; 12. fixed seat; 13. stop pin; 14. limit groove; 15. bearing seat; 16. shoulder; 17. transmission ring; 18. photoelectric probe; 19. flywheel; 20. crossbeam; 21. connecting rod; 22. adjustment knob; 23. slider; 24. guide rail; 25. pin; 26. encoder; 27. transmission block; 28. single drive part; 29. ​​guardrail; 30. angle sensor; 31. mechanical latch; 32. hinge support; 33. slot. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] See also Figure 1 , Figure 2 and Figure 3 , an embodiment provided by the present invention: an electric heavy-load conveying platform for fire doors with automatic bending function, the use method of which includes the following steps: S1, turn on the power, start the master control box, turn on the driving motor of the roller unit 3, the master control box receives the fire door opening signal, and controls the actuator to act; S2, the hydraulic cylinder pushes the connecting rod 21 through the transmission rod, drives the slider 23 of the guide mechanism to move on the guide rail 24, and the pin 25 assists in positioning; S3, the articulated arm 4 rotates around the joint shaft 7 under the action of the guide mechanism and the joint shaft 7, so that the bending section of the conveying platform body 2 is bent downward to 90 degrees, and the flywheel 19 assists the rotation of the joint shaft 7; S4, the angle sensor 30 monitors the angle change of the bending section of the conveying platform body 2. When it reaches 90 degrees, the signal is transmitted to the photoelectric probe 18 through the data line, and fed back to the master control box to ensure that the bending is in place; The automatic bending mechanism 1 includes a joint arm 4, a joint shaft 7 and a tapered roller bearing 11, one end of the joint arm 4 is connected to the guide mechanism, the other end of the joint arm 4 is movably connected to the joint shaft 7, both ends of the joint shaft 7 are installed on the outer wall of the fixed seat 12 through the tapered roller bearings 11, the joint shaft 7 passes through both ends of the joint arm 4, the tail end of the joint shaft 7 is welded to the fixed end of the conveying platform body 2, retaining rings 8 are fixedly installed at both ends of the outer wall of the joint shaft 7, and the outer ring of the tapered roller bearing 11 is interference fit with the mounting hole of the joint arm 4; Further, the conveying platform body 2 is passed through the hydraulic support foot 5 on the side of the load-bearing frame 9, and the anchor bolts are screwed into the ground embedded parts using the mounting holes on the gasket 10 to ensure that the conveying platform body 2 is in a horizontal state, the roller units 3 are on the same horizontal plane, and the mechanical latch 31 is not inserted into the slot 33 of the bending section of the conveying platform body 2; Turn on the power, start the master control box, turn on the roller unit 3 drive motor, when the master control box receives the fire door opening signal, the hydraulic cylinder pushes the connecting rod 21 through the transmission rod, drives the slider 23 of the guide mechanism to move on the guide rail 24, the pin 25 assists in positioning, and the articulated arm 4 rotates around the joint shaft 7 under the action of the guide mechanism and the joint shaft 7, so that the bending section of the conveying platform body 2 is bent downward to 90 degrees, the flywheel 19 assists the rotation of the joint shaft 7, and the angle sensor 30 monitors the angle change of the bending section of the conveying platform body 2. When it reaches 90 degrees, the signal is transmitted to the photoelectric probe 18 through the data line, and fed back to the master control box to ensure that the bending is in place. The roller unit 3 drives the fire door to move on the conveying platform body 2 through the chain transmission. When the articulated arm 4 rotates to 90 degrees, the stop pin 13 falls into the limit groove 14 to limit the joint arm 4 from continuing to rotate; The hydraulic cylinder retracts, and drives the guide mechanism through the connecting rod 21 to make the articulated arm 4 rotate in the opposite direction. The bending section of the conveying platform body 2 gradually rises, and the encoder 26 and the angle sensor 30 continuously monitor the angle. When the bending section of the conveying platform body 2 rises to be flush with the starting section and the output section, the master control box controls the actuator to stop the action.

[0028] See also Figure 1 , Figure 2 and Figure 4 , an embodiment provided by the present invention: an electric heavy-load conveying platform for fire doors with an automatic bending function, comprising a conveying platform body 2, an automatic bending mechanism 1 and a safety protection device, the automatic bending mechanism 1 is fixedly installed at the bottom end of the outer wall of the conveying platform body 2, the conveying platform body 2 is set to a three-section type, and a safety protection device is arranged inside the automatic bending mechanism 1; The method of use also includes the following steps: S11, passing the conveying platform body 2 through the hydraulic support foot 5 on the side of the load-bearing frame 9, using the mounting hole on the gasket 10, and screwing it into the ground embedded part with the anchor bolt; S12, confirming that the conveying platform body 2 is in a horizontal state, the roller units 3 are in the same horizontal plane, the mechanical latch 31 is not inserted into the slot 33 of the bending section of the conveying platform body 2, and during the rising process of the fire door, the master control box controls the actuator to move in the reverse direction; S13, when the articulated arm 4 rotates to 90 degrees, the stop pin 13 falls into the limit slot 14, restricting the articulated arm 4 from continuing to rotate; S14, the hydraulic cylinder retracts, and drives the guide mechanism through the connecting rod 21 to make the articulated arm 4 rotate in the reverse direction, and the bending section of the conveying platform body 2 gradually rises; S15, the encoder 26 and the angle sensor 30 continuously monitor the angle, and when the bending section of the conveying platform body 2 rises to be flush with the starting section and the output section, the master control box controls the actuator to stop moving; Further, multiple transmission rings 17 and photoelectric probes 18 are added to the inner wall side of the load-bearing frame 9, and at the same time, the chain transmission system of the roller unit 3 is adjusted; When the fire door enters the conveying platform body 2, multiple photoelectric sensors 18 monitor the position and status of the fire door in real time. The master control box controls the running speed of the roller unit 3 and the bending angle of the articulated arm 4 according to the monitoring data. During the rotation of the articulated arm 4, when the stop pin 13 contacts the edge of the limit slot 14, the system will fine-tune the rotation speed of the articulated arm 4. If the angle sensor 30 and the photoelectric probe 18 detect an abnormality, the master control cabinet controls the equipment to stop running, emergency braking, and the internal braking point of the hydraulic cylinder locks the piston to stop the actuator from moving.

[0029] See also Figure 1 , Figure 2 and Figure 5 , an embodiment provided by the present invention: an electric heavy-load conveying platform for fire doors with automatic bending function, S21, the hydraulic cylinder in the actuator drives the connecting rod 21 through the transmission rod, and the connecting rod 21 drives the joint arm 4 to rotate around the joint axis 7; S22, the roller unit 3 drives the fire door to move on the conveying platform body 2 through the chain transmission, when the joint arm 4 rotates, the stop pin 13 contacts the edge of the limit groove 14; S41, the angle sensor 30 and the photoelectric probe 18 detect an abnormality, the master control box control equipment stops running, emergency braking, the brake point inside the hydraulic cylinder locks the piston, and the actuator stops moving; The outer wall side of the hydraulic support foot 5 is fixedly mounted with a crossbeam 20, the outer wall top of the hydraulic support foot 5 is fixedly mounted with a guardrail 29, one end of the outer wall side of the guardrail 29 is fixedly mounted with an angle sensor 30, the outer wall side of the angle sensor 30 is fixedly mounted with a mechanical latch 31, and the bending section of the conveying platform body 2 is provided with a slot 33; the angle sensor 30 is connected to the bus of the photoelectric probe 18 via a data line; Further, the conveying platform body 2 is passed through the hydraulic support foot 5 on the side of the load-bearing frame 9, and the anchor bolts are screwed into the ground embedded parts using the mounting holes on the gasket 10 to confirm that the conveying platform body 2 is in a horizontal state, the roller units 3 are in the same horizontal plane, and the mechanical latch 31 is not inserted into the slot 33 of the bending section of the conveying platform body 2; The master control box is equipped with an intelligent control system and a remote monitoring module. Before the equipment is operated, the operator inputs the parameters of the fire door into the master control box through the remote monitoring system, turns on the power, starts the master control box, and turns on the driving motor of the roller unit 3. When the master control box receives the fire door opening signal, it controls the actuator to move. The hydraulic cylinder pushes the connecting rod 21 through the transmission rod, driving the slider 23 of the guide mechanism to move on the guide rail 24. The pin 25 assists in positioning. The articulated arm 4 rotates around the articulated shaft 7 under the action of the guide mechanism and the articulated shaft 7. The flywheel 19 assists the rotation of the articulated shaft 7, so that the bending section of the conveying platform body 2 is bent downward to 90 degrees. The angle sensor 30 monitors the angle change of the bending section in real time. When it reaches 90 degrees, the signal is transmitted to the photoelectric probe 18 through the data line and fed back to the master control box to ensure that the bending is in place.

[0030] See also Figure 1 , Figure 3 and Figure 5 , an embodiment of the present invention: an electric heavy-load conveying platform for fire doors with an automatic bending function, the guide mechanism includes a slider 23, a guide rail 24 and a pin 25, the guide rail 24 is fixedly installed at the bottom end of the outer wall of the slider 23, the pin 25 is fixedly installed at the front end of the outer wall of the guide rail 24, an encoder 26 is fixedly installed on the outer wall side of the joint shaft 7, and the encoder 26 is connected to the photoelectric probe 18 through a data line; a transmission block 27 is fixedly installed on the outer wall side of the guide rail 24, a single drive part 28 is fixedly installed on the outer wall side of the transmission block 27, a connecting rod 21 is fixedly installed on the outer wall side of the single drive part 28, and a hinge support 32 is fixedly installed on the bottom end of the outer wall of the connecting rod 21; The safety protection device includes a stop pin 13, the bottom end of the outer wall of the articulated arm 4 is fixedly mounted with the stop pin 13, the side surface of the outer wall of the load-bearing frame 9 is provided with a limiting groove 14, and the stop pin 13 contacts the edge of the limiting groove 14; A flywheel 19 is fixedly mounted on the outer wall of the joint shaft 7, and the three sections of the conveying platform body 2 are respectively a starting section, a bending section and an output section; The roller units 3 are installed on the same horizontal plane. The roller units 3 are driven by chains. A transmission ring 17 is fixedly installed on the inner wall side of the load-bearing frame 9. A photoelectric probe 18 runs through the middle of the transmission ring 17. The photoelectric probe 18 is connected to the master control box through a cable. Furthermore, in terms of safety protection devices, in addition to the original stop pin 13 and limit groove 14, cushions are added to key parts of the articulated arm 4 and the conveying platform body 2, and multiple warning lights and alarms are installed on the guardrail 29 to issue warnings in time when the equipment operates abnormally or someone approaches the dangerous area; During the operation of the equipment, the warning light displays the operating status of the equipment in real time. When the articulated arm 4 rotates, if someone approaches the dangerous area, the alarm will sound immediately. At the same time, the master control chassis controls the equipment to slow down or stop running. During the bending and resetting process, the buffer pad protects the equipment components.

[0031] See also Figure 1 , Figure 3 and Figure 4 , an embodiment provided by the present invention: an electric heavy-load conveying platform for fire doors with an automatic bending function, wherein the conveying platform body 2 is composed of a roller unit 3, bearing seats 15 are fixedly installed at both ends of the outer wall of the roller unit 3, and a shaft shoulder 16 is fixedly installed on the outer wall of the bearing seat 15; a load-bearing frame 9 is fixedly installed on both sides of the outer wall of the conveying platform body 2, a hydraulic support foot 5 is fixedly installed on the side of the outer wall of the load-bearing frame 9, a gasket 10 is welded and installed on the bottom end of the outer wall of the hydraulic support foot 5, and the ground bolt is screwed into the embedded part on the ground through the installation hole opened on the gasket 10, and a fixing seat 12 is fixedly installed on the side of the outer wall of the load-bearing frame 9; The tail end of the articulated arm 4 is fixedly provided with a guide mechanism, the top of the outer wall of the guide mechanism is fixedly provided with a reinforcing rib 6, the side of the outer wall of the reinforcing rib 6 is fixedly provided with an adjusting knob 22, and the guide mechanism is connected to the actuator through a coupling; the actuator comprises a connecting rod 21 and a hydraulic cylinder, the hydraulic cylinder is connected to the connecting rod 21 through a transmission rod, a braking point is arranged inside the hydraulic cylinder, the braking point locks the piston, and the actuator is connected to the articulated arm 4 through a coupling; Further, the master control box and the roller unit 3 drive motor are turned on, the hydraulic cylinder pushes the transmission rod, drives the connecting rod 21, and moves the slider 23 of the guide mechanism on the guide rail 24. The pin 25 assists in positioning, and the articulated arm 4 rotates around the articulated shaft 7 under the action of the guide mechanism and the articulated shaft 7. At this time, the angle sensor monitors the bending angle in real time. When it reaches the set 90 degrees, the signal is fed back to the master control box to ensure that the bending is in place; The roller unit 3 drives the fire door to move on the conveying platform body 2 through chain transmission. After the fire door closing signal is triggered, the master control box controls the actuator to move in the opposite direction, the hydraulic cylinder retracts, driving the connecting rod 21 to make the articulated arm 4 rotate in the opposite direction, and the bending section of the conveying platform body 2 gradually rises and resets. The encoder and angle sensor continuously monitor the angle. When it rises to the same level as the starting section and the output section, the master control box controls the actuator to stop moving.

[0032] Working principle: the hydraulic cylinder in the actuator pushes the connecting rod 21 through the transmission rod, driving the slider 23 of the guide mechanism to move on the guide rail 24, and the pin 25 assists in positioning, so that the joint arm 4 rotates around the joint shaft 7 under the action of the guide mechanism and the joint shaft 7. The two ends of the joint shaft 7 are installed on the outer wall of the fixed seat 12 through the tapered roller bearings 11, and the tail end is welded to the fixed end of the conveying platform body 2. During the rotation process, the flywheel 19 assists the rotation of the joint shaft 7, and finally the bending section of the conveying platform body 2 is bent downward to 90 degrees; The hydraulic cylinder retracts, and drives the guide mechanism through the connecting rod 21 to make the articulated arm 4 rotate in the opposite direction, and the bending section of the conveying platform body 2 gradually rises. When the bending section of the conveying platform body 2 rises to the same level as the starting section and the output section, the master control box controls the actuator to stop moving, and the platform reset is completed.

[0033] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. An electric heavy-load conveying platform for fire doors with automatic bending function, characterized by: The invention comprises a conveying platform body (2), an automatic bending mechanism (1) and a safety protection device, wherein the automatic bending mechanism (1) is fixedly mounted on the bottom end of the outer wall of the conveying platform body (2), the conveying platform body (2) is arranged in three sections, and the safety protection device is arranged inside the automatic bending mechanism (1); The automatic bending mechanism (1) comprises a joint arm (4), a joint shaft (7) and a tapered roller bearing (11); one end of the joint arm (4) is connected to a guide mechanism; the other end of the joint arm (4) is movably connected to the joint shaft (7); both ends of the joint shaft (7) are mounted on the outer wall of a fixed seat (12) through tapered roller bearings (11); the joint shaft (7) passes through both ends of the joint arm (4); the tail end of the joint shaft (7) is welded to the fixed end of the conveying platform body (2); retaining rings (8) are fixedly mounted on both ends of the outer wall of the joint shaft (7); and the outer ring of the tapered roller bearing (11) is interference fit with the mounting hole of the joint arm (4).

2. The electric heavy-load conveying platform for fire doors with automatic bending function according to claim 1 is characterized by: The conveying platform body (2) is composed of a roller unit (3), bearing seats (15) are fixedly mounted on both ends of the outer wall of the roller unit (3), and shaft shoulders (16) are fixedly mounted on the outer wall of the bearing seat (15); A load-bearing frame (9) is fixedly installed on both sides of the outer wall of the conveying platform body (2), a hydraulic support foot (5) is fixedly installed on the side of the outer wall of the load-bearing frame (9), a gasket (10) is welded and installed on the bottom end of the outer wall of the hydraulic support foot (5), and a ground bolt is screwed into the embedded part on the ground through the installation hole opened on the gasket (10), and a fixing seat (12) is fixedly installed on the side of the outer wall of the load-bearing frame (9).

3. The electric heavy-load conveying platform for fire doors with automatic bending function according to claim 1 is characterized by: The safety protection device comprises a stop pin (13), the stop pin (13) being fixedly mounted on the bottom end of the outer wall of the articulated arm (4), a limiting groove (14) being arranged on the side of the outer wall of the load-bearing frame (9), and the stop pin (13) being in contact with the edge of the limiting groove (14).

4. The electric heavy-load conveying platform for fire doors with automatic bending function according to claim 1 is characterized by: A flywheel (19) is fixedly mounted on the outer wall of the joint shaft (7), and the three sections of the conveying platform body (2) are respectively a starting section, a bending section and an output section.

5. The electric heavy-load conveying platform for fire doors with automatic bending function according to claim 1 is characterized by: A guide mechanism is fixedly mounted on the rear end of the articulated arm (4), a reinforcing rib (6) is fixedly mounted on the top of the outer wall of the guide mechanism, an adjusting knob (22) is fixedly mounted on the side of the outer wall of the reinforcing rib (6), and the guide mechanism is connected to the actuator via a coupling; The actuator comprises a connecting rod (21) and a hydraulic cylinder. The hydraulic cylinder is connected to the connecting rod (21) via a transmission rod. A braking point is provided inside the hydraulic cylinder. The braking point locks the piston. The actuator is connected to the articulated arm (4) via a coupling.

6. The electric heavy-load conveying platform for fire doors with automatic bending function according to claim 2 is characterized by: The roller units (3) are installed on the same horizontal plane. The roller units (3) are driven by chains. A transmission ring (17) is fixedly installed on the inner wall side of the load-bearing frame (9). A photoelectric probe (18) runs through the middle of the transmission ring (17). The photoelectric probe (18) is connected to the master control cabinet via a cable.

7. The electric heavy-load conveying platform for fire doors with automatic bending function according to claim 2, characterized in that: A crossbeam (20) is fixedly mounted on the side of the outer wall of the hydraulic support foot (5), a guardrail (29) is fixedly mounted on the top of the outer wall of the hydraulic support foot (5), an angle sensor (30) is fixedly mounted on one end of the side of the outer wall of the guardrail (29), a mechanical latch (31) is fixedly mounted on the side of the outer wall of the angle sensor (30), and a slot (33) is provided in the bending section of the conveying platform body (2); The angle sensor (30) is connected to the bus of the photoelectric probe (18) via a data line.

8. The electric heavy-load conveying platform for fire doors with automatic bending function according to claim 1 is characterized by: The guide mechanism comprises a slider (23), a guide rail (24) and a pin (25); the guide rail (24) is fixedly mounted on the bottom end of the outer wall of the slider (23); the pin (25) is fixedly mounted on the front end of the outer wall of the guide rail (24); an encoder (26) is fixedly mounted on the side of the outer wall of the joint shaft (7); and the encoder (26) is connected to the photoelectric probe (18) via a data line; A transmission block (27) is fixedly mounted on the side surface of the outer wall of the guide rail (24), a single drive component (28) is fixedly mounted on the side surface of the outer wall of the transmission block (27), a connecting rod (21) is fixedly mounted on the side surface of the outer wall of the single drive component (28), and a hinge support (32) is fixedly mounted on the bottom end of the outer wall of the connecting rod (21).

9. A method for using an electric heavy-load conveying platform for fire doors with an automatic bending function, applicable to an electric heavy-load conveying platform for fire doors with an automatic bending function as claimed in any one of claims 1 to 8, characterized in that: The method of use comprises the following steps: S1, turn on the power supply, start the master control box, turn on the roller unit (3) drive motor, the master control box receives the fire door opening signal, and controls the actuator to move; S2, the hydraulic cylinder pushes the connecting rod (21) through the transmission rod, driving the slider (23) of the guide mechanism to move on the guide rail (24), and the pin (25) assists in positioning; S3, the articulated arm (4) rotates around the articulated shaft (7) under the action of the guide mechanism and the articulated shaft (7), so that the bending section of the conveying platform body (2) is bent downward to 90 degrees, and the flywheel (19) assists the articulated shaft (7) to rotate; S4, the angle sensor (30) monitors the angle change of the bending section of the conveying platform body (2). When it reaches 90 degrees, the signal is transmitted to the photoelectric probe (18) through the data line and fed back to the master control box to ensure that the bending is in place.

10. The method for using the electric heavy-load conveying platform for fire doors with automatic bending function according to claim 9, characterized in that: The method of use also includes the following steps: S11, the conveying platform body (2) is screwed into the ground embedded parts through the hydraulic support feet (5) on the side of the load-bearing frame (9) using the mounting holes on the gaskets (10); S12, confirming that the conveying platform body (2) is in a horizontal state, the roller units (3) are on the same horizontal plane, the mechanical latch (31) is not inserted into the slot (33) of the bending section of the conveying platform body (2), and the main control box controls the actuator to move in the reverse direction during the rising process of the fire door; S13, when the articulated arm (4) rotates to 90 degrees, the stop pin (13) falls into the limiting groove (14), limiting the articulated arm (4) from further rotation; S14, the hydraulic cylinder retracts, and the guide mechanism is driven by the connecting rod (21) to cause the joint arm (4) to rotate in the opposite direction, so that the bending section of the conveying platform body (2) gradually rises; S15, the encoder (26) and the angle sensor (30) continuously monitor the angle, and when the bending section of the conveying platform body (2) rises to be flush with the starting section and the output section, the master control box controls the actuator to stop the action; S21, the hydraulic cylinder in the actuator drives the connecting rod (21) through the transmission rod, and the connecting rod (21) drives the joint arm (4) to rotate around the joint axis (7); S22, the roller unit (3) drives the fire door to move on the conveying platform body (2) through chain transmission, and when the articulated arm (4) rotates, the stop pin (13) contacts the edge of the limit groove (14); S41, the angle sensor (30) and the photoelectric probe (18) detect an abnormality, the master control cabinet controls the equipment to stop running, emergency braking, the brake point inside the hydraulic cylinder locks the piston, and the actuator stops moving.

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