A multi-overlapping anti-derailment balanced hangar door

Abstract

The invention discloses a multi-overlapping anti-derailment balanced hangar door, comprising a plurality of lower tracks arranged in parallel, a door leaf being arranged on each lower track in a rolling manner, a balancing clamping wheel and an anti-derailment device being arranged on a housing of a running wheel, a plurality of upper tracks being arranged in parallel above the plurality of lower tracks, and a gap between each two adjacent upper tracks corresponding to one lower track, two guide wheels being arranged on the top of the door leaf, the guide wheels being located between the two adjacent upper tracks, an anti-overturning device being arranged on the top of the door leaf, and the anti-overturning device being also located between the two adjacent upper tracks; traction devices being arranged on both sides of the door leaf, the two adjacent door leaves being pulled and moved by the traction devices, the door leaf located at the innermost side of a door opening among the plurality of mutually parallel door leaves being an active door leaf, a driving motor driving the active door leaf to move, and the active door leaf driving the other door leaves to move through the traction device; the invention meets the requirements of the hangar door for high safety, high reliability and high stability.

Description

Technical Field

[0001] The invention relates to a multi-overlapping anti-derailment balanced hangar door, belonging to the technical field of hangar doors. Background Art

[0002] At present, more and more hangars are being built in my country, and the number of hangar doors is also increasing. However, in harsh environments, such as when the wind load is large, the skeleton structure of traditional hangar doors can withstand wind pressure, but the upper guide wheel is a weak point, and there are no other protective measures, so the safety performance is low; when the door leaf stops suddenly, there is inertia. If the direction of wind pressure is consistent with the direction of load, the door leaf is likely to derail; the hangar door opening is large, and most traditional hangar doors adopt multi-overlap settings, independent drive, multiple lines, and high failure rate; therefore, it is necessary to design a new type of hangar door that is safer, more reliable, and more stable to solve the above problems. Summary of the invention

[0003] In order to solve the deficiencies in the prior art, the present invention provides a multi-overlapping anti-derail balanced hangar door, wherein a door leaf anti-overturning device is designed at a guide wheel position to form multiple protections; an anti-derail device is designed at a running wheel position so that the door leaf can firmly hook a track under the action of inertia and wind pressure to prevent the running wheel from derailing; only one group of driving motors is designed to drive active door leaves, and other door leaves are towed and walked by the active door leaves through a designed traction device, so only one group of control systems and circuit systems is needed, the circuit is simple, and the failure rate is low; and a balancing clamping wheel is designed at the running wheel position to firmly clamp both sides of the track, offset the traction arm, reduce the driving load of the driving motor, and improve the transmission efficiency and safety.

[0004] The technical solution adopted by the present invention is:

[0005] A multi-overlapping anti-derailment balanced hangar door comprises a plurality of lower tracks arranged in parallel, a door leaf is arranged on each lower track, the plurality of door leaves are parallel to each other, two running wheels are arranged at the bottom of the door leaf, the door leaf rolls on the lower track through the two running wheels, a balancing clamping wheel and an anti-derailment device are arranged on the housing of the running wheel, two balancing clamping wheels are arranged, the two balancing clamping wheels are respectively located on both sides of the lower track and are in rolling contact with the wall surfaces on both sides of the lower track, the anti-derailment device is two L-shaped steel plates, and the two L-shaped steel plates are symmetrically located on both sides of the lower track; a plurality of upper tracks are arranged in parallel above the plurality of lower tracks, and the gap between each two adjacent upper tracks corresponds to a lower track, and a balancing clamping wheel and an anti-derailment device are arranged at the top of the door leaf. There are two guide wheels, the axes of which are perpendicular to the top of the door leaf, the guide wheels are located between two adjacent upper rails, and the outer circumferential surfaces of the guide wheels are in rolling contact with the two adjacent upper rails respectively. An anti-overturning device is also provided on the top of the door leaf, and the anti-overturning device is also located between the two adjacent upper rails; traction devices are respectively provided on both sides of the door leaf, and the two adjacent door leaves are moved by traction devices. Among several door leaves parallel to each other, the door leaf located at the innermost side of the door opening is an active door leaf, and a driving motor is provided on the active door leaf, and the driving motor is transmission-connected to one of the walking wheels on the active door leaf, and the driving motor drives the active door leaf to move, and the active door leaf drives the remaining door leaves to move through the traction device.

[0006] Among them, the anti-derail device is milled from high-strength alloy steel plate and is connected and fixed to the shell of the running wheel by bolts to ensure the relative position relationship between the running wheel and the anti-derail device, ensuring that there is no jamming when the door leaf is in operation; when the hangar door is in operation and suddenly stops, the door leaf will generate inertia of movement, the lower running wheel of the active door leaf has a driving motor for braking traction, while the upper part does not have any braking equipment, and the other door leaves also do not have any braking equipment, thus forming a very long torque, causing the door leaf to tilt forward and jump. If the door runs with the wind at this time, the wind pressure plus the inertia of movement is likely to cause the door leaf to tilt and the running wheel to derail. At this time, the anti-derail device will hook the lower track to prevent the running wheel from leaving the lower track and prevent the door leaf from derailing.

[0007] As a further preferred embodiment of the present invention, the balancing clamp wheel includes a wheel frame, a shaft and a clamp wheel, the wheel frame is fixedly mounted on the housing of the walking wheel, the shaft is fixedly mounted on the wheel frame, the clamp wheel is rotatably arranged on the shaft through a bearing, the outer circumferential surface of the clamp wheel is in rolling contact with the side wall of the lower track, and the clamp wheel is made of nylon material; wherein the shaft is made of high-strength alloy steel, and the clamp wheel is made of nylon material, which has the characteristics of wear resistance and pressure resistance, and the clamp wheel is rotatably arranged on the shaft through a bearing to improve the rolling efficiency of the clamp wheel; when the active door leaf is running, the other door leaves as driven door leaves all rely on the traction device for traction and movement, thereby increasing the torque, at this time, the balancing clamp wheel tightly clamps the two sides of the lower track, balances the traction torque, prevents the door leaf from deflecting, prevents energy loss, and provides stable and reliable operation guarantee for the normal operation of the door leaf.

[0008] As a further preferred embodiment of the present invention, the anti-overturning device includes a steel section and a reinforcing steel plate, the steel section is fixedly connected to the top of the door leaf, the height of the steel section is greater than the two adjacent upper rails, the reinforcing steel plate is fixedly connected to the top of the steel section, and the width of the reinforcing steel plate is greater than the width between the two adjacent upper rails; nylon guide wheels are respectively arranged on both sides of the steel section, and the width between the two nylon guide wheels is less than the diameter of the guide wheel; the anti-overturning device is welded by the steel section and the reinforcing steel plate, and is welded to the door leaf as a whole, and nylon guide wheels are arranged on both sides to provide secondary protection measures for the door leaf; when the wind pressure is very large, the guide wheels come out When the door leaf is deformed, it will tilt. At this time, the nylon guide wheel on the anti-overturning device will roll in contact with the upper track. When the nylon guide wheel is deformed, the reinforced steel plate on the upper part of the anti-overturning device will hook the upper track to prevent the door leaf from deforming and leaving the upper track and overturning. The anti-overturning device can play a role when the guide wheel is deformed, and can continue to support the operation of the entire door leaf to prevent the door leaf from tipping over; it provides three protection measures for the hangar door to increase the safety performance of the hangar door; the anti-overturning device provides multiple safety protections for the hangar door. At the same time, in the event of guide wheel failure, the door leaf can still run to a safe place for maintenance.

[0009] As a further preferred embodiment of the present invention, the embedded plate is first welded and fixed to the foundation steel bars on the ground of the door opening and the first concrete pouring is carried out, and then the lower track is welded and fixed to the embedded plate, and edge protection angle steels are respectively arranged on both sides of the lower track. After the edge protection angle steels are welded with anchor hooks, the second concrete pouring is carried out together with the lower track to prevent the ground on both sides of the lower track from being crushed when the aircraft passes through the door opening.

[0010] As a further preferred embodiment of the present invention, the traction device includes a base and a traction block, one end of the base is fixedly connected to the side of the door leaf by bolts, and the other end of the base is fixedly connected to the traction block by bolts, and the traction block is made of polyurethane material; two adjacent door leaves are hooked and connected with each other through the traction device for power transmission, and the traction block is made of polyurethane material to prevent rigid contact between the traction devices and play a buffering and shock-absorbing role.

[0011] As a further preferred embodiment of the present invention, an airbag is provided on the side of the active door leaf. When the door leaf is closed, the airbag is located between the active door leaf and the wall to prevent the active door leaf from colliding hard with the wall in the moving direction when the door leaf is closing.

[0012] As a further preferred embodiment of the present invention, an anti-collision device is arranged on the lower track to prevent the door leaf from moving beyond the limit when the door leaf is open.

[0013] As a further preferred embodiment of the present invention, a sealing device is provided at the bottom of the door leaf for shielding the running wheels, the balancing clamping wheels and the anti-derailment device.

[0014] As a further preference of the present invention, it also includes a control system, which is composed of a frequency converter and a PLC controller. The PLC controller has a reserved communication interface, and the control system is used to control the drive motor; it can realize local control and remote control; infrared sensing devices are also arranged on the inner and outer walls of the door opening, and the infrared sensing devices are electrically connected to the control system; the infrared sensing devices are used to detect whether there are people entering or exiting, and are linked with the control system to realize automatic opening and closing of the door.

[0015] The beneficial effects of the present invention are as follows: a door leaf anti-overturning device is designed at the guide wheel position to form multiple protections; an anti-derailment device is designed at the running wheel position so that the door leaf can firmly hook the track to prevent the running wheel from derailing under the action of inertia and wind pressure; only one set of driving motors is designed to drive the active door leaf, and other door leaves are towed and walked by the active door leaf through the designed traction device, so only one set of control system and circuit system is needed, the circuit is simple and the failure rate is low; the usage of hangar door motors and circuits is reduced, the failure rate such as circuit aging is reduced, and the complexity of the control system is reduced; and a balancing clamping wheel is designed at the running wheel position to firmly clamp both sides of the track, offset the traction arm, reduce the driving load of the driving motor, and improve the transmission efficiency and safety; the requirements of the hangar door for high safety, high reliability and high stability are met. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the front structure of the present invention;

[0017] Figure 2 It is a schematic diagram of the structure of the present invention when it is in an open state;

[0018] Figure 3 It is a structural schematic diagram of the present invention in a closed state;

[0019] Figure 4 It is a schematic diagram of the longitudinal structure of the present invention in a closed state;

[0020] Figure 5 for Figure 4 A schematic diagram of the structure at the middle and bottom positions;

[0021] Figure 6 for Figure 4 A schematic diagram of the structure at the top of the middle part is enlarged;

[0022] Figure 7 It is a schematic structural diagram of the position relationship between the anti-overturning device and the guide wheel of the present invention;

[0023] Figure 8 It is a schematic structural diagram of the positional relationship between the anti-overturning device and the upper track of the present invention;

[0024] Fig. 9 It is a schematic diagram of the transmission connection structure between the driving motor of the present invention and the running wheel on the active door leaf;

[0025] Fig.10 It is a structural schematic diagram of the position of the travel wheel of the present invention;

[0026] Fig.11 for Fig.10 A-direction view in the figure;

[0027] Fig.12 for Fig.10 B view in the figure;

[0028] Fig.13 It is a schematic diagram of the structure of the traction device at the connection position of two adjacent door leaves of the present invention;

[0029] The main reference numerals in the figure have the following meanings:

[0030] 1-door leaf, 2-upper track, 3-lower track, 4-guide wheel, 5-traveling wheel, 6-anti-overturning device, 7-nylon guide wheel, 8-traction device, 9-infrared sensing device, 10-safety airbag, 11-upper track bracket, 12-balance clamping wheel, 13-embedded plate, 14-edge protection angle steel, 15-anti-derailment device, 16-steel, 17-reinforced steel plate, 18-base, 19-traction block, 20-wheel frame, 21-axle, 22-clamping wheel, 23-anti-collision device, 24-drive motor, 25-foundation steel bar, 26-sealing device. DETAILED DESCRIPTION

[0031] The present invention will be specifically described below in conjunction with the accompanying drawings and embodiments.

[0032] like Figure 1-13As shown: the present embodiment is a multi-overlapping anti-derail balance hangar door, comprising five lower tracks 3 arranged in parallel, a door leaf 1 is provided on each lower track 3, the five door leaves 1 are parallel to each other, two running wheels 5 are arranged at the bottom of the door leaf 1, the door leaf 1 rolls on the lower track 3 through the two running wheels 5, a balancing clamping wheel 12 and an anti-derail device 15 are provided on the housing of the running wheel 5, the balancing clamping wheel 12 is provided with two, the two balancing clamping wheels 12 are respectively located on both sides of the lower track 3 and are in rolling contact with the wall surfaces on both sides of the lower track 3, the anti-derail device 15 is two L-shaped steel plates, and the two L-shaped steel plates are symmetrically located on both sides of the lower track 3; six upper tracks 2 are arranged in parallel above the five lower tracks 3, the upper track 2 is fixedly connected to the wall by an upper track bracket 11, and the gap between every two adjacent upper tracks 2 corresponds to a lower Track 3, two guide wheels 4 are arranged on the top of the door leaf 1, the axes of the guide wheels 4 are perpendicular to the top of the door leaf 1, the guide wheels 4 are located between two adjacent upper tracks 2, and the outer circumferential surfaces of the guide wheels 4 are in rolling contact with the two adjacent upper tracks 2 respectively, and an anti-overturning device 6 is also arranged on the top of the door leaf 1, and the anti-overturning device 6 is also located between the two adjacent upper tracks 2; traction devices 8 are respectively arranged on both sides of the door leaf 1, and the two adjacent door leaves 1 are pulled and moved by the traction devices 8. Among the five parallel door leaves 1, the door leaf 1 located at the innermost side of the door opening is the active door leaf, and a driving motor 24 is arranged on the active door leaf, and the driving motor 24 is transmission-connected to one of the walking wheels 5 on the active door leaf, and the driving motor 24 drives the active door leaf to move, and the active door leaf drives the remaining door leaves 1 to move through the traction device 8.

[0033] In actual application, several lower rails 3 can also be arranged in parallel, and a door leaf 1 is arranged on each lower rail 3. The several door leaves 1 are parallel to each other, and several upper rails 2 are arranged in parallel above the several lower rails 3, and the gap between each two adjacent upper rails 2 corresponds to a lower rail 3.

[0034] like Figure 5 , 10 As shown in 12, wherein, anti-derail device 15 is formed by milling of high-strength alloy steel plate, is connected and fixed with the housing of running wheel 5 by bolt, ensures the relative position relationship between running wheel 5 and anti-derail device 15, ensures that there is no blocking phenomenon when door leaf 1 is running; when hangar door is in operation, sudden emergency stop, door leaf 1 will produce motion inertia, active door leaf lower part running wheel 5 has driving motor 24 braking traction, and top does not have any braking equipment, and remaining door leaf 1 does not have any braking equipment either, thereby forms very long moment, makes door leaf 1 tilt forward, jump, if now the gate runs downwind, then wind pressure plus motion inertia is likely to cause door leaf 1 to tilt, running wheel 5 derails, now, anti-derail device 15 can hook lower track 3, makes running wheel 5 not separate from lower track 3, prevents door leaf 1 from derailing.

[0035] like Fig.10 and11 As shown, in this embodiment, the balancing clamp wheel 12 includes a wheel frame 20, a shaft 21 and a clamp wheel 22. The wheel frame 20 is fixedly mounted on the housing of the walking wheel 5, and the shaft 21 is fixedly mounted on the wheel frame 20. The clamp wheel 22 is rotatably arranged on the shaft 21 through a bearing. The outer circumferential surface of the clamp wheel 22 is in rolling contact with the side wall of the lower track 3, and the clamp wheel 22 is made of nylon material; wherein the shaft 21 is made of high-strength alloy steel, and the clamp wheel 22 is made of nylon material, which has the characteristics of wear resistance and pressure resistance. The clamp wheel 22 is rotatably arranged on the shaft 21 through a bearing, so as to improve the rolling efficiency of the clamp wheel 22; when the active door leaf is running, the other door leaves 1 as driven door leaves all rely on the traction device 8 for traction and movement, so that the torque increases. At this time, the balancing clamp wheel 12 tightly clamps the two sides of the lower track 3, balances the traction torque, prevents the door leaf 1 from deflecting, prevents energy loss, and provides stable and reliable operation guarantee for the normal operation of the door leaf 1.

[0036] like Figure 7 and 8 As shown, in this embodiment, the anti-overturning device 6 includes a steel section 16 and a reinforcing steel plate 17. The steel section 16 is fixedly connected to the top of the door leaf 1. The height of the steel section 16 is greater than the two adjacent upper rails 2. The reinforcing steel plate 17 is fixedly connected to the top of the steel section 16. The width of the reinforcing steel plate 17 is greater than the width between the two adjacent upper rails 2. Nylon guide wheels 7 are respectively arranged on both sides of the steel section 16. The width between the two nylon guide wheels 7 is less than the diameter of the guide wheel 4. The anti-overturning device 6 is welded by the steel section 16 and the reinforcing steel plate 17, and is welded to the door leaf 1 as a whole. Nylon guide wheels 7 are arranged on both sides to provide secondary protection measures for the door leaf 1. When the wind pressure is very large, the guide wheels 4 is deformed, the door leaf 1 will tilt, and the nylon guide wheel 7 on the anti-overturning device 6 will roll in contact with the upper track 2. When the nylon guide wheel 7 is deformed, the reinforcing steel plate 17 on the anti-overturning device 6 will hook the upper track 2 to prevent the door leaf 1 from deforming and breaking away from the upper track 2 and overturning. The anti-overturning device 6 can play a role when the guide wheel 4 is deformed, and can continue to support the operation of the entire door leaf 1 to prevent the door leaf 1 from overturning; three protection measures are provided for the hangar door to increase the safety performance of the hangar door; the anti-overturning device 6 provides multiple safety protections for the hangar door, and when the guide wheel 4 fails, the door leaf 1 can still run to a safe place for maintenance.

[0037] like Figure 5 As shown, in this embodiment, the embedded plate 13 is firstly welded and fixed to the foundation steel bar 25 on the ground of the door opening and the first concrete pouring is performed, and then the lower track 3 is welded and fixed to the embedded plate 13, and edge protection angle steels 14 are respectively arranged on both sides of the lower track 3. After the edge protection angle steels 14 are welded with anchor hooks, the second concrete pouring is performed together with the lower track 3 to prevent the ground on both sides of the lower track 3 from being crushed when the aircraft passes through the door opening.

[0038] like Fig.13As shown, in this embodiment, the traction device 8 includes a base 18 and a traction block 19, one end of the base 18 is fixedly connected to the side of the door leaf 1 by bolts, and the other end of the base 18 is fixedly connected to the traction block 19 by bolts, and the traction block 19 is made of polyurethane material; the two adjacent door leaves 1 are hooked and connected with each other through the traction device 8 for power transmission, and the traction block 19 is made of polyurethane material to prevent rigid contact between the traction devices 8 and play a buffering and shock-absorbing role.

[0039] like Figure 1 As shown, in this embodiment, an airbag 10 is provided on the side of the active door leaf. When the door leaf 1 is in a closed state, the airbag 10 is located between the active door leaf and the wall to prevent the active door leaf from having a hard collision with the wall in the moving direction when closing.

[0040] like Figure 1-3 As shown, in this embodiment, an anti-collision device 23 is provided on the lower track 3 to prevent the door leaf 1 from moving beyond the limit when the door leaf 1 is in the open state.

[0041] like Figure 5 As shown, in this embodiment, a sealing device 26 is provided at the bottom of the door leaf 1 , which is used to shield the balancing clamping wheel 12 and the anti-derailment device 15 , and can also shield the traveling wheel 5 .

[0042] This embodiment also includes a control system, which is composed of a frequency converter and a PLC controller. The PLC controller has a reserved communication interface, and the control system is used to control the drive motor; it can realize local control and remote control; Figure 2 and 3 As shown, infrared sensing devices 9 are also provided on the inner and outer walls of the door opening, and the infrared sensing devices 9 are electrically connected to the control system; the infrared sensing devices 9 are used to detect whether there are people entering or exiting, and are linked with the control system to realize automatic opening and closing of the door.

[0043] The present invention designs a door leaf anti-overturning device at the guide wheel position to form multiple protections; designs an anti-derailment device at the running wheel position so that the door leaf can firmly hook the track to prevent the running wheel from derailing under the action of inertia and wind pressure; only one set of driving motors is designed to drive the active door leaf, and other door leaves are towed and walked by the active door leaf through the designed traction device, so only one set of control system and circuit system is needed, the circuit is simple and the failure rate is low; the usage of the hangar door motor and the circuit is reduced, the failure rate of circuit aging and the like is reduced, and the complexity of the control system is reduced; and a balancing clamping wheel is designed at the running wheel position to firmly clamp both sides of the track, offset the traction arm, reduce the driving load of the driving motor, and improve the transmission efficiency and safety; the requirements of the hangar door for high safety, high reliability and high stability are met.

[0044] The above is only a preferred implementation of the patent of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the patent of the present invention. These improvements and modifications should also be regarded as the scope of protection of the patent of the present invention.

Claims

1. A multi-overlapping anti-derailment balanced hangar door, characterized in that: The invention comprises a plurality of lower tracks arranged in parallel, a door leaf is arranged on each lower track, the plurality of door leaves are parallel to each other, a sealing device and two running wheels are arranged at the bottom of the door leaf, the door leaf rolls on the lower track through the two running wheels, a balancing clamping wheel and an anti-derail device are arranged on the housing of the running wheel, two balancing clamping wheels are arranged, the two balancing clamping wheels are respectively located at both sides of the lower track and are in rolling contact with the wall surfaces at both sides of the lower track, the anti-derail device is two L-shaped steel plates, and the two L-shaped steel plates are symmetrically located at both sides of the lower track; a plurality of upper tracks are arranged in parallel above the plurality of lower tracks, and a gap between each two adjacent upper tracks corresponds to a lower track, and two guide wheels are arranged at the top of the door leaf. The guide wheel is perpendicular to the top of the door leaf, the guide wheel is located between two adjacent upper tracks, and the outer circumferential surface of the guide wheel is in rolling contact with the two adjacent upper tracks respectively. An anti-overturning device is also provided on the top of the door leaf, and the anti-overturning device is also located between the two adjacent upper tracks; traction devices are respectively provided on both sides of the door leaf, and the two adjacent door leaves are moved by traction devices. Among the multiple door leaves parallel to each other, the door leaf located at the innermost side of the door opening is the active door leaf, and a driving motor is provided on the active door leaf, and the driving motor is connected to one of the walking wheels on the active door leaf, and the driving motor drives the active door leaf to walk, and the active door leaf drives the remaining door leaves to walk through the traction device; The anti-overturning device includes a steel section and a reinforcing steel plate. The steel section is fixedly connected to the top of the door leaf, the height of the steel section is greater than the two adjacent upper rails, the reinforcing steel plate is fixedly connected to the top of the steel section, and the width of the reinforcing steel plate is greater than the width between the two adjacent upper rails; nylon guide wheels are respectively arranged on both sides of the steel section, and the width between the two nylon guide wheels is smaller than the diameter of the guide wheels.

2. A multi-overlap anti-derailment balanced hangar door according to claim 1, characterized in that: The balancing clamp wheel includes a wheel frame, a shaft and a clamp wheel. The wheel frame is fixedly mounted on the housing of the walking wheel, the shaft is fixedly mounted on the wheel frame, the clamp wheel is rotatably arranged on the shaft through a bearing, the outer circumferential surface of the clamp wheel is in rolling contact with the side wall of the lower track, and the clamp wheel is made of nylon material.

3. A multi-overlap anti-derailment balanced hangar door according to claim 1, characterized in that: On the ground of the door opening, the embedded plate is first welded to the foundation steel bar and the first concrete pouring is carried out. Then the lower track is welded to the embedded plate and fixed. Edge protection angle steels are respectively set on both sides of the lower track. After the edge protection angle steels are welded with anchor hooks, the second concrete pouring is carried out together with the lower track.

4. A multi-overlap anti-derailment balanced hangar door according to claim 1, characterized in that: The traction device comprises a base and a traction block, one end of the base is fixedly connected to the side of the door leaf through bolts, and the other end of the base is fixedly connected to the traction block through bolts, and the traction block is made of polyurethane material.

5. The multi-overlap anti-derailment balanced hangar door according to claim 1, characterized in that: An airbag is arranged on the side of the active door leaf. When the door leaf is closed, the airbag is located between the active door leaf and the wall.

6. The multi-overlap anti-derailment balanced hangar door according to claim 1, characterized in that: An anti-collision device is arranged on the lower track.

7. The multi-overlap anti-derailment balanced hangar door according to claim 1, characterized in that: It also includes a control system, which is composed of a frequency converter and a PLC controller. The PLC controller has a reserved communication interface, and the control system is used to control the drive motor; infrared sensing devices are also arranged on the inner and outer walls of the door opening, and the infrared sensing devices are electrically connected to the control system.

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