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

Abstract

The application discloses a fireproof door electric heavy-load conveying platform with an automatic bending function and a use method, relates to the technical field of heavy-load conveying equipment, and 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 provided in a three-section mode, and the safety protection device is arranged in the automatic bending mechanism. Through the automatic bending mechanism, the bending section of the conveying platform body is bent downward to 90 degrees and is reset, the problem that a traditional conveying platform cannot flexibly adjust the structure to adapt to the lifting requirement of the fireproof door is solved, and the adaptability of the conveying platform to the conveying of the fireproof door is improved.

Description

Technical Field

[0001] This invention relates to the field of heavy-duty conveying equipment technology, specifically to an electric heavy-duty conveying platform for fire doors with automatic bending function and its usage method. Background Technology

[0002] The continuous advancement of automation control technology has provided technical support for electric heavy-duty conveyor platforms for fire doors. Through PLC control systems, sensors, and other equipment, the conveyor platform can operate automatically, precisely controlling parameters such as conveying speed and position, thereby improving the accuracy and stability of the conveying process.

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

[0004] Therefore, it is essential to propose an electric heavy-duty conveying platform for fire doors with automatic bending function and a method of using it to solve the problems in the background.

[0005] 1. Patent document CN106404570B discloses a device and method for monitoring the frictional fatigue of a heavy-duty scraper conveyor sprocket under vibration and impact. The above patent realizes the simulation of the frictional fatigue fracture behavior of the heavy-duty scraper conveyor sprocket under 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 heavy-duty scraper conveyor circular links. The above patent realizes the monitoring of dynamic tension, friction force, impact load, temperature, corrosion wear rate and fatigue life of the circular links. 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 heavy-duty scraper conveyor circular links in complex operating environments.

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

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

[0009] In summary, inspired by the above patents, this application has developed a technical solution that enables the main body of the conveyor platform to bend downwards to 90 degrees and reset, the conveyor platform to bend accurately, and the protective actuator and multi-functional collaborative function to achieve the following: the traditional conveyor platform cannot flexibly adjust its structure to meet the needs of fire door lifting and lowering, the conveyor platform has poor motion accuracy during bending, and the equipment cannot stop in time when there is a sudden abnormality, which brings safety hazards.

[0010] Therefore, this application proposes an electric heavy-duty conveyor platform with automatic bending function for fire doors, which can realize the downward bending of the main bending section of the conveyor platform to 90 degrees and reset, accurate bending of the conveyor platform, protection actuator and multi-functional collaborative function, and a method of use. Summary of the Invention

[0011] The purpose of this invention is to provide an electric heavy-duty conveying platform for fire doors with automatic bending function and a method of using it, so as to solve the technical problems mentioned in the background art, such as the inability of traditional conveying platforms to flexibly adjust their structure to meet the lifting and lowering requirements of fire doors, poor motion accuracy of the conveying platform during bending, and the inability of the equipment to stop in time when sudden abnormalities occur, which bring about safety hazards.

[0012] To achieve the above objectives, the present invention provides the following technical solution: an electric heavy-duty conveying platform for fire doors with 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 of the outer wall of the conveying platform body, the conveying platform body is configured as a three-section structure, and the safety protection device is provided inside the automatic bending mechanism;

[0013] The automatic bending mechanism includes a joint arm, a joint shaft, and tapered roller bearings. One end of the joint arm is connected to a guide mechanism, and the other end of the joint arm is movably connected to the joint shaft. Both ends of the joint shaft are mounted on the outer wall of the fixed seat through tapered roller bearings. The joint shaft passes through both ends of the joint arm, and the tail end of the joint shaft is welded to the fixed end of the conveying platform body. Retaining rings are fixedly installed at both ends of the outer wall of the joint shaft. The outer ring of the tapered roller bearing is interference-fitted with the mounting hole of the joint arm.

[0014] Preferably, the main body of the conveying platform is composed of roller units, and 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 seats;

[0015] The main body of the conveying platform is fixedly installed with load-bearing frames on both sides of the outer wall. Hydraulic support feet are fixedly installed on the outer side of the load-bearing frames. Gaskets are welded to the bottom of the outer wall of the hydraulic support feet. Ground bolts are screwed into the embedded parts in the ground through the mounting holes opened on the gaskets. Fixed seats are fixedly installed on the outer side of the load-bearing frames.

[0016] Preferably, the safety protection device includes a stop pin, a stop pin is fixedly installed at the bottom of the outer wall of the articulated arm, and a limit groove is provided on the side of the outer wall of the load-bearing frame, with the stop pin contacting the edge of the limit groove.

[0017] Preferably, a flywheel is fixedly installed on the outer wall of the joint shaft, and the three sections of the main body of the conveying platform are the starting section, the bending section and the output section.

[0018] 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 adjustment 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;

[0019] 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 set inside the hydraulic cylinder to lock the piston. The actuator is connected to the articulated arm through a coupling.

[0020] 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 inner wall side of the load-bearing frame, a photoelectric probe runs through the middle of the transmission ring, and the photoelectric probe is connected to the main control box through a cable.

[0021] Preferably, a crossbeam is fixedly installed on the outer side 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 outer side of the guardrail, a mechanical pin is fixedly installed on the outer side of the angle sensor, and a slot is provided in the bending section of the main body of the conveying platform.

[0022] The angle sensor is connected to the bus of the photoelectric probe via a data cable.

[0023] Preferably, the guiding mechanism includes a slider, a guide rail, and a pin. The guide rail is fixedly installed at the bottom of the outer wall of the slider, the pin is fixedly installed at the front end of the outer wall of the guide rail, and an encoder is fixedly installed on the side of the outer wall of the joint shaft. The encoder is connected to the photoelectric probe through a data cable.

[0024] A transmission block is fixedly installed on the outer side of the guide rail. A single drive component is fixedly installed on the outer side of the transmission block. A connecting rod is fixedly installed on the outer side of the single drive component. A hinge support is fixedly installed at the bottom of the outer wall of the connecting rod.

[0025] Preferably, the method of use includes the following steps:

[0026] S1. Connect the power supply, start the main control box, turn on the roller unit drive motor, and the main control box receives the fire door opening signal to control the actuator to move.

[0027] S2. The hydraulic cylinder pushes the connecting rod through the transmission rod, which drives the slider of the guide mechanism to move on the guide rail, and the pin assists in positioning.

[0028] S3. Under the action of the guide mechanism and the joint shaft, the articulated arm rotates around the joint shaft, causing the bending section of the main body of the conveying platform to bend downwards at 90 degrees, and the flywheel assists the joint shaft to rotate.

[0029] S4. Angle sensor monitors the angle change of the bending section of the main body of the conveyor platform. When it reaches 90 degrees, the signal is transmitted to the photoelectric probe through the data line and fed back to the main control box to ensure that the bending is in place.

[0030] Preferably, the method of use further includes the following steps:

[0031] S11. The main body of the conveyor platform is screwed into the ground embedded part with anchor bolts through the hydraulic support feet on the side of the load-bearing frame and the mounting holes on the shims.

[0032] S12. Confirm that the main body of the conveyor platform is in a horizontal state, all roller units are on the same horizontal plane, the mechanical pin is not inserted into the slot of the bending section of the main body of the conveyor platform, and the main control box controls the actuator to move in the opposite direction during the fire door rising.

[0033] S13. When the articulated arm rotates to 90 degrees, the stop pin falls into the limit groove, restricting the articulated arm from continuing to rotate.

[0034] S14. The hydraulic cylinder retracts, and the connecting rod drives the guide mechanism to rotate the articulated arm in the opposite direction, causing the bending section of the main body of the conveying platform to gradually rise.

[0035] S15, the encoder and angle sensor continuously monitor the angle. When the bending section of the main body of the conveyor platform rises to be level with the starting section and the output section, the main control box controls the actuator to stop moving.

[0036] 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 joint axis.

[0037] S22. The roller unit drives the fire door to move on the main body of the conveyor platform through chain drive. When the articulated arm rotates, the stop pin contacts the edge of the limit groove.

[0038] S41. When the angle sensor and photoelectric probe detect an abnormality, the control equipment in the main control box stops operating, applies an emergency brake, and locks the piston at the internal braking point of the hydraulic cylinder, stopping the actuator from moving.

[0039] Compared with the prior art, the beneficial effects of the present invention are:

[0040] 1. This invention uses an automatic bending mechanism to achieve downward bending of the main body of the conveying platform to 90 degrees and then reset, solving the problem that traditional conveying platforms cannot flexibly adjust their structure to meet the lifting and lowering requirements of fire doors, and improving the adaptability of the conveying platform to fire door conveying.

[0041] 2. This invention achieves accurate bending of the conveyor platform through a guiding mechanism, solving the problem of poor motion accuracy of the conveyor platform during bending and improving the reliability of equipment operation;

[0042] 3. This invention uses a stop pin and a limit groove to protect the actuator, solving the safety hazard caused by the equipment's inability to stop operating in time during sudden abnormalities, and effectively protecting the key components of the equipment;

[0043] 4. This invention achieves multi-functional collaboration through the three-section main body of the conveying platform, solving the problem of poor stability of the conveying platform, making the fire door more stable during the conveying process, and improving the conveying efficiency and safety of the fire door. Attached Figure Description

[0044] Figure 1 This is a front view structural diagram of the present invention;

[0045] Figure 2 This is a schematic diagram of the automatic bending mechanism of the present invention;

[0046] Figure 3 This is a schematic diagram of the main structure of the conveying platform of the present invention;

[0047] Figure 4 This is a schematic diagram of the front structure of the present invention;

[0048] Figure 5 This is a schematic diagram of the safety protection device structure of the present invention.

[0049] In the diagram: 1. Automatic bending mechanism; 2. Conveying platform body; 3. Roller unit; 4. Articulated arm; 5. Hydraulic support foot; 6. Reinforcing rib; 7. Articulated shaft; 8. Retaining ring; 9. Load-bearing frame; 10. Shim; 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 component; 29. ​​Guardrail; 30. Angle sensor; 31. Mechanical pin; 32. Hinge support; 33. Slot. Detailed Implementation

[0050] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0051] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0052] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" 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 an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0053] Please see Figure 1 , Figure 2 and Figure 3 This invention provides an embodiment of an electric heavy-duty conveying platform for fire doors with automatic bending function. The method of use includes the following steps: S1, power is turned on, the main control box is started, the drive motor of the roller unit 3 is turned on, the main 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, which 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 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 bends downward to 90 degrees, and the flywheel 19 assists the rotation of the articulated 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 main control box to ensure that the bending is in place;

[0054] 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 a guide mechanism, and 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 the fixed seat 12 through the tapered roller bearing 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. The outer ring of the tapered roller bearing 11 is interference-fitted with the mounting hole of the joint arm 4.

[0055] Furthermore, the conveyor platform body 2 is connected to the hydraulic support feet 5 on the side of the load-bearing frame 9, and the anchor bolts are screwed into the ground embedded parts through the mounting holes on the gasket 10 to ensure that the conveyor platform body 2 is in a horizontal state, each roller unit 3 is on the same horizontal plane, and the mechanical pin 31 is not inserted into the slot 33 of the bent section of the conveyor platform body 2.

[0056] When the power is turned on and the main control box is started, the drive motor of the roller unit 3 is turned on. When the main control box receives the signal that the fire door is open, the hydraulic cylinder pushes the connecting rod 21 through the transmission rod, which drives the slider 23 of the guide mechanism to move on the guide rail 24. The pin 25 assists in positioning. Under the action of the guide mechanism and the joint shaft 7, the articulated arm 4 rotates around the joint shaft 7, so that the bending section of the conveyor platform body 2 bends downward to 90 degrees. The flywheel 19 assists the joint shaft 7 to rotate. The angle sensor 30 monitors the angle change of the bending section of the conveyor 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 main control box to ensure that the bending is in place. The roller unit 3 drives the fire door to move on the conveyor platform body 2 through chain drive. When the articulated arm 4 rotates to 90 degrees, the stop pin 13 falls into the limit groove 14 to limit the articulated arm 4 from continuing to rotate.

[0057] The hydraulic cylinder retracts, and the connecting rod 21 drives the guide mechanism to rotate the articulated arm 4 in the opposite direction. The bending section of the conveying platform body 2 gradually rises. 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 level with the starting section and the output section, the control box controls the actuator to stop moving.

[0058] Please see Figure 1 , Figure 2 and Figure 4 An embodiment of the present invention provides: an electric heavy-duty conveying platform for fire doors with 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 of the outer wall of the conveying platform body 2. The conveying platform body 2 is configured as a three-section structure. The safety protection device is provided inside the automatic bending mechanism 1.

[0059] The method of use also includes the following steps: S11, the conveyor platform body 2 is placed through the hydraulic support feet 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; S12, it is confirmed that the conveyor platform body 2 is in a horizontal state, all roller units 3 are on the same horizontal plane, the mechanical pin 31 is not inserted into the slot 33 of the bending section of the conveyor platform body 2, and during the rise of the fire door, the main 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 groove 14, restricting the articulated arm 4 from continuing to rotate; S14, the hydraulic cylinder retracts, and the connecting rod 21 drives the guide mechanism to make the articulated arm 4 rotate in the reverse direction, and the bending section of the conveyor 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 conveyor platform body 2 rises to be level with the starting section and the output section, the main control box controls the actuator to stop moving;

[0060] Furthermore, multiple transmission rings 17 and photoelectric probes 18 are added to the inner wall side of the load-bearing frame 9, and the chain drive system of the roller unit 3 is adjusted at the same time.

[0061] After the fire door enters the main body 2 of the conveyor platform, multiple photoelectric probes 18 monitor the position and status of the fire door in real time. The main 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. When the stop pin 13 contacts the edge of the limit groove 14 during the rotation of the articulated arm 4, the system will finely adjust the rotation speed of the articulated arm 4.

[0062] If the angle sensor 30 and the photoelectric probe 18 detect an abnormality, the control equipment in the main control box will stop operating, apply an emergency brake, lock the piston at the braking point inside the hydraulic cylinder, and stop the actuator from moving.

[0063] Please see Figure 1 , Figure 2 and Figure 5 An embodiment of the present invention provides: an electric heavy-duty 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 articulated arm 4 to rotate around the articulated shaft 7; S22, the roller unit 3 drives the fire door to move on the conveying platform body 2 through chain transmission. 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 the abnormality, the control equipment in the main control box stops running, performs emergency braking, the piston is locked at the braking point inside the hydraulic cylinder, and the actuator stops moving.

[0064] A crossbeam 20 is fixedly installed on the outer side of the hydraulic support foot 5, and a guardrail 29 is fixedly installed on the top of the outer wall of the hydraulic support foot 5. An angle sensor 30 is fixedly installed on one end of the outer side of the guardrail 29, and a mechanical pin 31 is fixedly installed on the outer side of the angle sensor 30. A slot 33 is opened in the bent section of the conveyor platform body 2. The angle sensor 30 is connected to the bus of the photoelectric probe 18 through a data cable.

[0065] Furthermore, the conveyor platform body 2 is connected to the hydraulic support feet 5 on the side of the load-bearing frame 9, and the anchor bolts are screwed into the ground embedded parts through the mounting holes on the gasket 10 to confirm that the conveyor platform body 2 is in a horizontal state, all roller units 3 are on the same horizontal plane, and the mechanical pin 31 is not inserted into the slot 33 of the bent section of the conveyor platform body 2.

[0066] The main control box is equipped with an intelligent control system and a remote monitoring module. Before the equipment is put into operation, the operator inputs the parameters of the fire door into the main control box through the remote monitoring system, turns on the power, starts the main control box, and turns on the drive motor of the roller unit 3. When the main control box receives the signal of the fire door opening, it controls the actuator to move. The hydraulic cylinder pushes the connecting rod 21 through the transmission rod, which drives the slider 23 of the guide mechanism to move on the guide rail 24. The pin 25 assists in positioning. Under the action of the guide mechanism and the joint shaft 7, the articulated arm 4 rotates around the joint shaft 7. The flywheel 19 assists in the rotation of the joint shaft 7, so that the bending section of the conveyor platform body 2 bends downward to 90 degrees. The angle sensor 30 monitors the change of the bending section angle 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 main control box to ensure that the bending is in place.

[0067] Please see Figure 1 , Figure 3 and Figure 5 An embodiment of the present invention provides: an electric heavy-duty conveying platform for fire doors with automatic bending function. The guiding mechanism includes a slider 23, a guide rail 24, and a pin 25. The guide rail 24 is fixedly installed at the bottom of the outer wall of the slider 23, and 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 side of the outer wall of the joint shaft 7. The encoder 26 is connected to a photoelectric probe 18 via a data cable. A transmission block 27 is fixedly installed on the side of the outer wall of the guide rail 24. A single drive component 28 is fixedly installed on the side of the outer wall of the transmission block 27. A connecting rod 21 is fixedly installed on the side of the outer wall of the single drive component 28. A hinge support 32 is fixedly installed at the bottom of the outer wall of the connecting rod 21.

[0068] The safety protection device includes a stop pin 13. The stop pin 13 is fixedly installed at the bottom of the outer wall of the articulated arm 4. A limit groove 14 is provided on the side of the outer wall of the load-bearing frame 9. The stop pin 13 contacts the edge of the limit groove 14.

[0069] The flywheel 19 is fixedly installed on the outer wall of the joint shaft 7, and the three sections of the conveying platform body 2 are the starting section, the bending section and the output section.

[0070] The roller unit 3 is installed on the same horizontal plane. The roller unit 3 is driven by a chain. A transmission ring 17 is fixedly installed on the inner side of the load-bearing frame 9. A photoelectric probe 18 passes through the middle of the transmission ring 17. The photoelectric probe 18 is connected to the main control box through a cable.

[0071] Furthermore, in terms of safety protection devices, in addition to the original stop pin 13 and limit groove 14, buffer pads are added to key parts of the articulated arm 4 and the main body of the conveying platform 2, and multiple warning lights and alarms are installed on the guardrail 29 to issue timely warnings when the equipment is operating abnormally or when someone approaches the dangerous area.

[0072] During equipment operation, warning lights display the equipment's operating status in real time. When joint arm 4 rotates, if someone approaches the danger zone, the alarm will sound immediately, and the main control box will control the equipment to slow down or stop operating. During bending and resetting, buffer pads protect the equipment components.

[0073] Please see Figure 1 , Figure 3 and Figure 4 An embodiment of the present invention provides: an electric heavy-duty conveying platform for fire doors with automatic bending function. The main body 2 of the conveying platform is composed of roller units 3. Bearing seats 15 are fixedly installed at both ends of the outer wall of the roller unit 3, and bearing shoulders 16 are fixedly installed on the outer wall of the bearing seats 15. Load-bearing frames 9 are fixedly installed on both sides of the outer wall of the main body 2 of the conveying platform. Hydraulic support feet 5 are fixedly installed on the outer side of the outer wall of the load-bearing frame 9. Shims 10 are welded to the bottom of the outer wall of the hydraulic support feet 5. Ground bolts are screwed into the embedded parts in the ground through the mounting holes opened on the shims 10. Fixing seats 12 are fixedly installed on the outer side of the load-bearing frame 9.

[0074] The articulated arm 4 is fixedly equipped with a guide mechanism at its tail end. A reinforcing rib 6 is fixedly installed at the top of the outer wall of the guide mechanism. An adjustment knob 22 is fixedly installed on the side of the outer wall of the reinforcing rib 6. The guide mechanism is connected to the actuator through a coupling. The actuator includes 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 provided inside the hydraulic cylinder. The braking point locks the piston. The actuator is connected to the articulated arm 4 through a coupling.

[0075] Furthermore, the main control box and the drive motor of the roller unit 3 are turned on, the hydraulic cylinder pushes the transmission rod, drives the connecting rod 21, so that the slider 23 of the guide mechanism moves 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 the set 90 degrees is reached, the signal is fed back to the main control box to ensure that the bending is in place.

[0076] The roller unit 3 drives the fire door to move on the main body 2 of the conveyor platform via chain drive. After the fire door is closed, the main control box controls the actuator to move in the opposite direction. The hydraulic cylinder retracts, which drives the connecting rod 21 to rotate the articulated arm 4 in the opposite direction. The bending section of the main body 2 of the conveyor platform gradually rises and resets. The encoder and angle sensor continuously monitor the angle. When it rises to be level with the starting section and the output section, the main control box controls the actuator to stop moving.

[0077] Working principle: The hydraulic cylinder in the actuator pushes the connecting rod 21 through the transmission rod, which drives the slider 23 of the guide mechanism to move on the guide rail 24. The pin 25 assists in positioning, so that the articulated arm 4 rotates around the articulated shaft 7 under the action of the guide mechanism and the articulated shaft 7. The two ends of the articulated shaft 7 are mounted on the outer wall of the fixed seat 12 through tapered roller bearings 11, and its tail end is welded to the fixed end of the conveying platform body 2. During the rotation, the flywheel 19 assists the rotation of the articulated shaft 7, and finally causes the bent section of the conveying platform body 2 to bend downward to 90 degrees.

[0078] The hydraulic cylinder retracts, and the connecting rod 21 drives the guide mechanism to rotate the articulated arm 4 in the opposite direction. The bending section of the conveying platform body 2 gradually rises. When the bending section of the conveying platform body 2 rises to be level with the starting section and the output section, the control box stops the actuator, and the platform reset is completed.

[0079] It will be apparent to those skilled in the art that the present 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 its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A fire door electric heavy-duty conveying platform with automatic bending function, characterized in that: It includes 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 of the outer wall of the conveying platform body (2). The conveying platform body (2) is configured as a three-section structure. The automatic bending mechanism (1) is equipped with a safety protection device inside. 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 a guide mechanism, and 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 the fixed seat (12) through the tapered roller bearing (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 on both ends of the outer wall of the joint shaft (7). The outer ring of the tapered roller bearing (11) is interference-fitted with the mounting hole of the joint arm (4). An encoder (26) is fixedly installed on the side of the outer wall of the joint shaft (7). The encoder (26) is connected to the photoelectric probe (18) through a data cable. The safety protection device includes a stop pin (13), a stop pin (13) is fixedly installed at the bottom of the outer wall of the articulated arm (4), and a limit groove (14) is provided on the side of the outer wall of the load-bearing frame (9), with the stop pin (13) in contact with the edge of the limit groove (14); The guiding mechanism includes a slider (23), a guide rail (24) and a pin (25). The guide rail (24) is fixedly installed at the bottom of the outer wall of the slider (23), and the pin (25) is fixedly installed at the front end of the outer wall of the guide rail (24). A transmission block (27) is fixedly installed on the outer side of the guide rail (24). A single drive component (28) is fixedly installed on the outer side of the transmission block (27). A connecting rod (21) is fixedly installed on the outer side of the single drive component (28). A hinge support (32) is fixedly installed at the bottom of the outer wall of the connecting rod (21).

2. The electric heavy-duty conveying platform for fire doors with automatic bending function according to claim 1, characterized in that: The main body (2) of the conveying platform is composed of roller units (3). Bearing seats (15) are fixedly installed at both ends of the outer wall of the roller unit (3), and 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 main body (2) of the conveying platform. A hydraulic support foot (5) is fixedly installed on the outer side of the load-bearing frame (9). A gasket (10) is welded to the bottom of the outer wall of the hydraulic support foot (5). Ground bolts are screwed into the embedded parts in the ground through the installation holes opened on the gasket (10). A fixed seat (12) is fixedly installed on the outer side of the load-bearing frame (9).

3. The electric heavy-duty conveying platform for fire doors with automatic bending function according to claim 1, characterized in that: The flywheel (19) is fixedly installed on the outer wall of the joint shaft (7), and the three sections of the conveying platform body (2) are the starting section, the bending section and the output section.

4. The electric heavy-duty conveying platform for fire doors with automatic bending function according to claim 1, characterized in that: The articulated arm (4) is fixedly equipped with a guide mechanism at its tail end. A reinforcing rib (6) is fixedly installed on the top of the outer wall of the guide mechanism. An adjustment knob (22) is fixedly installed on the side of the outer wall of the reinforcing rib (6). The guide mechanism is connected to the actuator through a coupling. The actuator includes 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 provided inside the hydraulic cylinder, which locks the piston. The actuator is connected to the articulated arm (4) through a coupling.

5. The electric heavy-duty conveying platform for fire doors with automatic bending function according to claim 2, characterized in that: The roller unit (3) is installed on the same horizontal plane. The roller unit (3) is driven by a chain. A transmission ring (17) is fixedly installed on the inner wall side of the load-bearing frame (9). A photoelectric probe (18) passes through the middle of the transmission ring (17). The photoelectric probe (18) is connected to the main control box through a cable.

6. The electric heavy-duty conveying platform for fire doors with automatic bending function according to claim 2, characterized in that: A crossbeam (20) is fixedly installed on the outer side of the hydraulic support foot (5), a guardrail (29) is fixedly installed on the top of the outer wall of the hydraulic support foot (5), an angle sensor (30) is fixedly installed on one end of the outer side of the guardrail (29), a mechanical pin (31) is fixedly installed on the outer side of the angle sensor (30), and a slot (33) is opened 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 cable.

7. A method of using an electric heavy-duty conveyor platform for fire doors with automatic bending function, applicable to the electric heavy-duty conveyor platform for fire doors with automatic bending function as described in any one of claims 1-6, characterized in that: The method of use includes the following steps: S1. Connect the power supply, start the main control box, turn on the roller unit (3) drive motor, the main 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, which 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 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) bends downward to 90 degrees, and the flywheel (19) assists the articulated shaft (7) in rotating; S4. Angle sensor (30) monitors the angle change of the bending section of the main body (2) of the conveying platform. When it reaches 90 degrees, the signal is transmitted to the photoelectric probe (18) through the data line and fed back to the main control box to ensure that the bending is in place.

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

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