Coaxial double-shaft chain storage device of fire-fighting circulating chain ladder for fire-fighting engineering of high-rise building

Abstract

A coaxial double-shaft chain storage device of a fire-fighting circulating chain ladder of a high-rise building fire-fighting project comprises a temporary winding part, a chain storage winding part, a coupling mechanism and a spiral balance weight, the chain storage winding part is selectively connected with the temporary winding part in a coupled mode and comprises a chain storage roller shaft, and the other end of a roller chain is fixed to the chain storage roller shaft and wound on the chain storage roller shaft side by side in a stacked mode; the chain storage roller shaft and the temporary roller shaft are coaxially arranged; and the coupling mechanism is arranged between the chain storage winding and the temporary winding, is selectively in transmission connection with the temporary winding and is used for simulating chain ladder circulation, so that the roller chains which are not connected end to end are circularly arranged between the temporary winding and the chain storage winding. Temporary winding is cooperated with chain storage winding, three modes of chain unloading, chain loading and circulating chain are realized, the storage volume of the circulating chain is minimized, the operation is safe, and the use is simple.

Description

Technical Field

[0001] This invention relates to the field of fire-fighting equipment technology, specifically to a coaxial dual-axis chain storage device for a fire-fighting circulating chain ladder in a high-rise building fire protection project. Background Technology

[0002] With the outbreak of fires in buildings, especially high-rise fires in large and medium-sized cities, the rapid spread of smoke makes escape routes impossible, creating an urgent need for fire escape ladders for escaping high-rise buildings. Circulating chains, which are chains connected end-to-end, have the following drawbacks: 1) The circulating chain has a complex and bulky structure, making it prone to chain jamming; 2) People cannot board the circulating chain while it is suspended from the roof to the ground; it can only be used when the chain begins circulating again at the ground level, making it impractical.

[0003] Existing chain storage devices are typically foldable, for example, using two rows of chain wheels on the same plane with the chain folding back in a Z-shape. However, if this technology is used on high-rise buildings, it requires a large height and width to arrange the two rows of chain wheels, and the large size of the device placed on the roof will greatly affect the appearance.

[0004] Therefore, there is an urgent need in this field for a chain storage device for a circulating chain fire escape ladder in high-rise buildings. This device should be retractable, releasable, and allow people to climb on it while it is suspended to the ground. It should have a simple structure and low maintenance costs, thus becoming a key problem that urgently needs to be solved in the field of high-rise building escape. Summary of the Invention

[0005] In view of the defects existing in the prior art, the purpose of the present invention is to provide a coaxial dual-axis chain storage device for fire-fighting circulating chain ladders in high-rise building fire protection engineering. This application solves at least one of the following technical problems: ① the storage structure is simple and miniaturized; ② the chain is not easily jammed; ③ it takes time to convert to a usable state.

[0006] The objective of this invention is achieved by providing a coaxial dual-axis chain storage device for a fire-fighting circulating chain ladder in a high-rise building fire protection engineering project, comprising a frame and further comprising...

[0007] Temporary winding, which includes a temporary roller, with one end of the roller chain fixed to the temporary roller. Rotating the temporary roller can wind the roller chain side by side and in multiple layers onto it.

[0008] Storage chain winding, which can be selectively coupled to temporary winding, includes a storage chain roller shaft, with the other end of the roller chain fixed to the storage chain roller shaft and wound on it in multiple layers; the storage chain roller shaft and the temporary roller shaft are coaxially arranged.

[0009] A coupling mechanism is provided between the storage chain winding and the temporary winding to achieve a selective transmission connection. It is used to simulate the chain ladder cycle, so that the roller chain, which is not connected at the beginning and end, is cyclically arranged between the temporary winding and the storage chain winding. The chain ladder cycle is realized as follows: the storage chain winding winds / releases the chain while the temporary winding winds / releases the chain, and the speed of the storage chain winding / releases the chain is equal to the speed of the temporary winding / releases the chain.

[0010] Furthermore, it also includes inlet and outlet tensioning, which includes inlet and outlet sprockets, tensioning wheel one and tensioning wheel two arranged on the same plane. The shafts of the inlet and outlet sprockets, tensioning wheel one and tensioning wheel two form an isosceles triangle. The inlet and outlet tensioning are coaxially connected to the temporary winding and the chain storage winding, respectively.

[0011] Furthermore, the storage chain winding includes a storage chain support fixed to the roof, a storage chain roller rotatably mounted on the storage chain support, a gear ring coaxially fixed to the storage chain roller, the gear ring meshing with a damping gear, and the rotating shaft of the damping gear connected to a damping mechanism.

[0012] Furthermore, the helical counterweight includes a freely rotating counterweight roller shaft, with a planetary gear set spirally arranged on the outer circumference of the counterweight roller shaft. The planetary gear set includes a sun gear and multiple planetary gears. Multiple planetary gears are spirally spaced along the outer circumference of the sun gear. A helical sprocket is coaxially fixed along the helical direction on the planetary gears. The multiple helical sprockets form a helix, and the chain ladder is engaged in transmission between the helical gears.

[0013] Furthermore, the coupling mechanism includes a chain storage gear, a temporary gear, and a cylindrical gear. The chain storage gear is fixed to the first roller shaft, the temporary gear is fixed to the temporary gear, the temporary gear and the chain storage gear are arranged in parallel and simultaneously mesh with the cylindrical gear. The first roller shaft is selectively connected to the chain storage roller shaft via a coupling. The axis of the cylindrical gear is perpendicular to the first rotating shaft and the chain storage rotating shaft.

[0014] Furthermore, the selective transmission connection of the coupling is achieved as follows: a magnetic left coupling is provided coaxially and retractably on the first rotating shaft, a return spring is provided between the first rotating shaft and the magnetic left coupling, the end of the return spring is connected to the magnetic left coupling, the magnetic left coupling is connected to the on / off electromagnetic circuit i, and a permanent magnet right coupling is fixed at the end of the chain storage roller shaft.

[0015] Furthermore, the coupling mechanism includes a coupling and a coaxial reversing mechanism. The coaxial reversing mechanism includes a master gear and a slave gear located on the same main drive shaft. The master gear includes a master sun gear, a master ring gear, and at least three master planet gears meshing with each other. The slave gear includes a slave sun gear, a slave ring gear, and at least three slave inner planet gears and slave outer planet gears meshing with each other. The slave inner planet gear meshes with the master sun gear and the slave outer planet gears, and the slave outer planet gear meshes with the slave inner planet gear and the slave ring gear. The master ring gear and the slave ring gear are fixedly connected to the inner wall of the transmission box. The master planet gear, the slave inner planet gear, and the slave outer planet gear are rotatably mounted on the same planet carrier, which is connected to the slave drive shaft.

[0016] Furthermore, the chain storage device switches between chain-lowering mode A, chain-upper mode B, and chain-circulating mode C. In chain-lowering mode A, the brake for chain winding is released, the brake for temporary winding is engaged, the coupling mechanism is decoupled, and the roller chain below the chain winding is released by the weight of the helical counterweight. The chain storage roller shaft rotates slowly, outputting the roller chain until the helical counterweight is placed on the ground. In chain-upper mode B, the brake for chain winding is released, the brake for temporary winding is engaged, the coupling mechanism is decoupled, and the chain storage roller shaft is manually rotated by hand crank to drive the roller chain to wind onto the chain storage roller shaft until the helical counterweight rises to the roof, at which point the chain storage roller shaft is braked.

[0017] Furthermore, the chain storage device mainly operates in the circulating chain mode C. The chain storage winding is temporarily wound through the coupling mechanism. Every time the roller chain winds or unwinds once through the chain storage roller, the temporary roller will unwind or wind the roller chain once, so the length of the circulating chain ladder between the roof and the ground remains unchanged.

[0018] A coaxial dual-axis chain storage device for a fire-fighting circulating chain ladder in a high-rise building fire protection project is disclosed. The temporary winding 10 works in conjunction with the chain storage winding 20 to realize three modes: lowering the chain, raising the chain, and circulating the chain. Both the lowering chain and the circulating chain can be used to transport escape personnel. The time required to convert to the usable state is negligible. The unchanging Z-shaped return chain storage is replaced by a winding chain storage, which makes the chain storage smaller, easier to jam, safe to operate, and simple to use. It can be used as a means of vertical transportation in normal times and has great practical value. Attached Figure Description

[0019] Figure 1 This is a front view of Embodiment 1 of a coaxial dual-axis chain storage device for a fire-fighting circulating chain ladder in a high-rise building fire protection project according to the present invention;

[0020] Figure 2 This is Embodiment 1 of a coaxial dual-axis chain storage device for a fire-fighting circulating chain ladder in a high-rise building fire protection project according to the present invention. Figure 1 AA section view;

[0021] Figure 3This is Embodiment 2 of a coaxial dual-axis chain storage device for a fire-fighting circulating chain ladder in a high-rise building fire protection project according to the present invention. Figure 1 AA section view;

[0022] Figure 4 This is a main cross-sectional view of the spiral counterweight 50 of the coaxial dual-axis chain storage device for a fire-fighting circulating chain ladder in a high-rise building fire protection engineering according to the present invention.

[0023] Figure 5 This is a right view of the spiral counterweight 50 of the coaxial dual-axis chain storage device for a fire-fighting circulating chain ladder in a high-rise building fire protection engineering according to the present invention.

[0024] Figure 6 This is a left view of the spiral counterweight 50 of the coaxial dual-axis chain storage device for a fire-fighting circulating chain ladder in a high-rise building fire protection engineering according to the present invention.

[0025] The reference numerals in the above figure:

[0026] 10 Temporary winding, 11 Temporary roller,

[0027] 20 Storage chain winding, 21 Storage chain roller, 22 Storage chain support, 23 Gear ring, 24 Damping gear, 25 Damping mechanism, 27 Mode switcher, 29 Brake.

[0028] 30 Coupling mechanism, 31 Chain storage gear, 32 Temporary gear, 33 First rotating shaft, 34 Coupling, 34.1 Magnetic left coupling, 34.2 Permanent magnet right coupling, 35 Cylindrical gear, 37 Return spring.

[0029] 50. Spiral counterweight; 51. Counterweight frame; 52. Drive sprocket assembly; 53. Reversing sprocket; 54. Reduction gear set; 55. Sun gear; 56. Planetary gear; 57. Sun sprocket; 58. Planetary sprocket; 59. Drive roller shaft.

[0030] 60 Coaxial reverse rotation, 61 Main gear mechanism, 62 Slave gear mechanism, 63 Main drive shaft, 64 Planetary carrier, 65 Slave drive shaft

[0031] 61.1 Main Sun Gear, 61.2 Main Ring Gear, 61.3 Main Inner Planetary Gear, 61.4 Main Outer Planetary Gear

[0032] 62.1 From the sun gear, 62.2 From the ring gear, 62.3 From the planetary gear. Detailed Implementation

[0033] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but are not intended to limit the scope of the present invention.

[0034] Example 1

[0035] A coaxial dual-axis chain storage device for a fire-fighting circulating chain ladder in a high-rise building fire protection project, comprising:

[0036] Temporary winding 10 includes a temporary roller 11. One end of the chain ladder is fixed to the temporary roller 11. Rotating the temporary roller 11 can wind the chain ladder 2 onto the transmission plane N.

[0037] Storage chain winding 20, which can be selectively coupled to temporary winding 10, includes storage chain roller 21, with the other end of the chain ladder fixed to storage chain roller 21 and wound on storage chain roller 21 on the transmission plane M; storage chain roller 21 and temporary winding 11 are coaxially arranged.

[0038] The coupling mechanism 30 is disposed between the storage chain winding 20 and the temporary winding to achieve a selective transmission connection, which is used to simulate the chain ladder cycle. The chain ladder cycle is realized as follows: the storage chain winding 20 and the temporary winding 10 wind / unwind the chain at the same time, and the winding / unwinding speed of the storage chain winding 20 is equal to the winding / unwinding speed of the temporary winding 10.

[0039] The spiral counterweight 50 is used to realize the conversion of the chain ladder from chain storage, winding and releasing to temporary winding and winding, and to enable the chain ladder to continuously switch from the transmission plane M to the transmission plane N.

[0040] The chain ladder is preferably a single-chain chain ladder, and the chain body is preferably a roller chain.

[0041] The coupling mechanism 30 includes a coupling and a reverse drive. The reverse drive includes a chain storage gear 31, a temporary gear 32, and a cylindrical gear 35. The chain storage gear 31 is fixed to the first rotating shaft 33, and the temporary gear 32 is fixed to the temporary roller shaft 11. The cylindrical gear simultaneously meshes with the temporary gear 32 and the chain storage gear 31. The axis of the cylindrical gear is perpendicular to the first rotating shaft and the temporary rotating shaft. The cylindrical gear enables the chain storage gear and the temporary gear to rotate at the same speed but in opposite directions. The first rotating shaft 33 is rotatably supported in the coupling bearing seat 38, and the coupling bearing seat 38 is fixed to the frame.

[0042] The first rotating shaft 33 is selectively connected to the chain storage roller shaft 21 via a coupling 34. The selective connection is achieved as follows: the first rotating shaft 33 is coaxially and retractably provided with a magnetic left coupling 34.1. A return spring 37 is provided between the first rotating shaft 33 and the magnetic left coupling 34.1. The end of the return spring 37 is connected to the magnetic left coupling 35. The magnetic left coupling 35 is connected to the on / off electromagnetic circuit i. A permanent magnet right coupling 34.2 is fixed at the end of the chain storage roller shaft 21. By connecting the circuit, the magnetic left coupling 34.1 has a magnetism opposite to that of the permanent magnet right coupling 36 and attracts together with the permanent magnet right coupling 34.2, so that the first rotating shaft 33 is connected to the chain storage roller shaft 21. At this time, the rotation of the chain storage roller shaft 21 drives the first roller shaft 33 to rotate. The first roller shaft 33 drives the temporary roller shaft 11 to rotate in the opposite direction through gear meshing. When the electromagnetic circuit i is disconnected, the magnetic left coupling 34.1 loses its magnetism, and the reset spring 37 drives the magnetic left coupling 34.2 to leave the permanent magnet right coupling 36, causing the first rotating shaft 33 to disconnect from the transmission connection with the chain storage roller shaft 21.

[0043] The chain storage winding 20 also includes a spiral counterweight 50 disposed between the chain storage roller 21 and the temporary winding 10. To achieve coaxial arrangement, the chain ladder of the chain storage winding must be on one transmission plane N, and the chain ladder of the temporary winding must be on another transmission plane M parallel to the transmission plane N and spaced apart by a distance W. The spiral counterweight 50 realizes the continuous conversion of the chain ladder from the transmission plane N to the transmission plane M. The spiral counterweight 50 includes a counterweight frame 51 and a freely rotating counterweight roller 59. Drive sprocket sets 52 are rotatably provided at both ends of the counterweight roller 59. The drive sprocket sets 52 are respectively coupled to reduction gear sets 54, which serve as the reduction load for the drive sprocket sets 52. The reduction gear sets 54 are rotatably disposed at both ends of the counterweight frame 51. The reduction gear sets 54 include a sun gear 55 and multiple planetary gears 56. n planetary gears 56 are spirally spaced along the outer circumference of the sun gear 55, where n is a positive integer and n≥6. The multiple planetary gears 56 are rotatably disposed on the counterweight frame 51. The drive sprocket assembly 52 includes a sun sprocket 57 and multiple planetary sprockets 58, with the chain ladder engaging with the planetary sprockets and the sun sprocket for transmission. The coupling connection is achieved by a reduction gear assembly 54 coaxially fixed to the drive sprocket assembly 52; specifically, planetary gears 56 coaxially fixed to the planetary sprockets 58. The chain ladder drives multiple planetary sprockets 58 to rotate simultaneously in the same direction and at the same speed. These planetary sprockets 58 drive the coaxial planetary gears 56 to rotate, which in turn drive the sun gear 55 to rotate. The sun gear 55 is the driven gear; its larger diameter slightly slows down the chain ladder's transmission. Note that the sun sprocket 57 only serves to tension the chain ladder and is rotatably connected to the shaft of the sun gear 55. A reversing sprocket 53 is positioned between the two drive wheel sets 52 at both ends. The drive wheel set 52 at one end of the counterweight frame 51 axially enters the reversing sprocket 53 at the other end via the reversing sprocket 53, and exits from the planetary sprocket set 52 at the other end of the counterweight frame 51. The chain ladder is driven along the above path, and the drive wheel sets 52 at both ends drive the corresponding reduction gear sets 54 to rotate, realizing the passive reduction transmission of the sprockets in the helical counterweight 50.

[0044] The wheel counterweight frame 51 is equipped with a mode switcher 27. Both the storage chain winding 20 and the temporary winding 10 are equipped with brakes 28.

[0045] The chain storage winding 20 includes a chain storage support 22 fixed to the roof, a chain storage roller 21 rotatably mounted on the chain storage support 22, a gear ring 23 coaxially fixed to the chain storage roller 21, the gear ring 23 meshing with a damping gear 24, and the shaft of the damping gear 24 connected to a damping mechanism 25. A brake 29 is provided at the other end of the chain storage roller 21. Both the damping mechanism 25 and the brake 29 are prior art.

[0046] The storage chain device switches between three modes: downstream mode A, upstream mode B, and circulating mode C. The storage chain device is equipped with a mode switcher that can be operated manually.

[0047] The bottom of the support frame is equipped with a circulation mode start switch. When the counterweight sprocket 28 is placed on the ground, the circulation mode of the mode switch is automatically triggered, causing the chain storage device to automatically switch to circulation mode. In addition, when the counterweight sprocket 28 is placed on the ground, it can be attached to the ground mechanism to straighten the circulation chain and prevent it from swaying or bending.

[0048] The chain lowering mode is the chain release action of the chain storage device lowering the chain ladder from the roof. In chain lowering mode A, the brake of the chain storage winding 20 is released, the brake of the temporary winding 10 is engaged, the coupling mechanism 30 is decoupled, and the chain ladder below the chain storage winding 20 is driven out by the weight of the counterweight 50. The chain storage roller 21 is slowly rotated by the damping mechanism 25, and the chain ladder is output through the inlet and outlet tension 40 until the counterweight sprocket 28 is placed on the ground.

[0049] The chain-up mode is the chain winding action of the chain storage device retrieving the chain ladder from the ground to the rooftop. In chain-up mode B, the brake of chain winding 20 is released, the brake of temporary winding 10 is engaged, the coupling mechanism 30 is decoupled, and the chain storage roller 21 is manually rotated by hand crank, driving the chain ladder to wind onto the chain storage roller 21 until the spiral counterweight 50 is raised to the rooftop, at which point the chain storage roller 21 is braked. The chain-up action requires operating the mode switcher of the counterweight sprocket 28 to switch to chain-up mode B.

[0050] The circulating chain mode is a circulating chain action in which the lower chain and the upper chain are executed simultaneously. After the lower chain mode A is completed, the counterweight sprocket 28 is placed on the ground, the circulating mode start switch is activated, and it can automatically switch to the circulating chain mode. The storage chain winding 20 is coupled to the temporary winding 10 through the coupling mechanism 30. Every time the chain ladder 2 is wound around the storage chain roller 21, the temporary roller 11 releases the roller chain one turn. Thus, the length of the circulating chain ladder between the roof and the ground remains unchanged, and it is always suspended and circulated in front of the building, waiting for everyone to come down the chain ladder.

[0051] Example 2

[0052] The transmission mechanism inside the transmission box of the improved coupling mechanism is the same as that in Embodiment 1, except for the different parts.

[0053] A coaxial dual-axis chain storage device for a fire-fighting circulating chain ladder in a high-rise building fire protection project, comprising:

[0054] The coupling mechanism 30 includes a coupling and a coaxial reversing mechanism 60. The coaxial reversing mechanism 60 includes a master gear 61 and a slave gear 62 located on the same main drive shaft 63. The master gear 61 includes a master sun gear 61.1, a master ring gear 61.2, and at least three externally meshed master internal planet gears 61.3 and master external planet gears 61.4. The master internal planet gear 66.1 meshes between the master sun gear 61.1 and the master external planet gear 66.2, and the master external planet gear 61.4 meshes between the master internal planet gear 61.3 and the master ring gear 61.2. The slave gear 62 includes a slave sun gear 62.1, a slave ring gear 62.2, and at least three externally meshed slave planet gears 62.3. The master ring gear 61.2 and the slave ring gear 62.2 are fixedly connected to the inner wall of the transmission box. The main inner and outer planetary gears 61.3 and 61.4, and the driven planetary gear 62.3 are rotatably mounted on the same planetary carrier 64, which is connected to the driven shaft 65. The main sun gear 61.1 and the driven sun gear 62.1 have different numbers of teeth to ensure that the main drive shaft 63 and the driven shaft 65 obtain the same rotational speed.

[0055] This application has the following advantages: It uses a circulating chain ladder; ① both ends of the chain are wound on two coaxially coupled drums, allowing for chain loading and uncoupling; coupling enables chain circulation; the coaxial nature of the two winding rollers minimizes the overall volume, while the lower chain segment can continuously transport escape personnel, minimizing damage; ② the coupling + disc gear drive, and the coupling + double planetary gear structure achieve coaxial selective reverse rotation transmission coupling; ③ the helical counterweight provides counterweight while changing the chain ladder's circulation plane from plane N (entry) to plane M (output), thus achieving a chain plane with intervals between the two coaxial drums.

[0056] A coaxial dual-axis chain storage device for a fire-fighting circulating chain ladder in a high-rise building fire protection project is disclosed. The temporary winding 10 works in conjunction with the chain storage winding 20 to realize three modes: lower chain, upper chain, and circulating chain. Both the lower chain and the circulating chain can be used to transport escape personnel. The time required to convert to the usable state is negligible. The Z-shaped return chain storage is changed to a winding chain storage, which makes the chain storage smaller and less prone to jamming. Both the suspended chain state and the circulating chain state can be climbed by people, which has great practical value.

Claims

1. A coaxial dual-axis chain storage device for a fire-fighting circulating chain ladder in a high-rise building fire protection project, comprising a frame, characterized in that, Also includes Temporary winding (10) includes a temporary roller (11), one end of the roller chain is fixed to the temporary roller (11), and rotating the temporary roller (11) can wind the roller chain side by side and in multiple layers on the transmission plane N; Storage chain winding (20) can be selectively coupled to temporary winding (10). Storage chain winding (20) includes storage chain roller shaft (21). The other end of the roller chain is fixed to the storage chain roller shaft (21) and wound on it in parallel and in multiple layers on the transmission plane M. The storage chain roller shaft (21) and the temporary roller shaft (11) are coaxially arranged. The coupling mechanism (30) is located between the storage chain winding (20) and the temporary winding (10) to achieve selective transmission connection, which is used to simulate the chain ladder cycle, so that the roller chain that is not connected at the beginning and end is cyclically located between the temporary winding and the storage chain winding. The chain ladder cycle is realized as follows: the storage chain winding (20) winds / unwinds the chain while the temporary winding (10) winds / unwinds the chain, and the winding / unwinding speed of the storage chain winding (20) is equal to the winding / unwinding speed of the temporary winding (10). A helical counterweight (50) is placed between the chain storage winding (20) and the temporary winding (10) to realize the chain ladder’s return from chain storage winding to temporary winding and to enable the chain ladder to continuously switch from the transmission plane M to the transmission plane N.

2. The coaxial dual-axis chain storage device for the fire-fighting circulating chain ladder in high-rise building fire protection engineering as described in claim 1, characterized in that, The spiral counterweight (50) includes a freely rotating counterweight roller shaft (59), and drive sprocket sets (52) are rotatably provided at both ends of the counterweight roller shaft (59). The drive sprocket sets (52) are coupled to the reduction gear sets (54) respectively. The reduction gear sets (54) are rotatably provided at both ends of the counterweight frame (51). The drive sprocket sets (52) include a sun sprocket (57) and multiple planetary sprockets (58). The chain ladder is engaged in transmission between the planetary sprockets and the sun sprocket.

3. The coaxial dual-axis chain storage device for the fire-fighting circulating chain ladder in high-rise building fire protection engineering as described in claim 2, characterized in that, The storage chain winding (20) includes a storage chain support (22) fixed on the roof, a storage chain roller (21) rotatably mounted on the storage chain support (22), a gear ring (23) coaxially fixed on the storage chain roller (21), the gear ring (23) meshing with a damping gear (24), and the shaft of the damping gear (24) connected to a damping mechanism (25).

4. The coaxial dual-axis chain storage device for the fire-fighting circulating chain ladder in high-rise building fire protection engineering as described in claim 3, characterized in that, The coupling mechanism (30) includes a coupling, which selectively drives the connection as follows: a magnetic left coupling (34.1) is provided coaxially and telescopically on the first rotating shaft (33), a return spring (37) is provided between the first rotating shaft (33) and the magnetic left coupling (34.1), the end of the return spring (37) is connected to the magnetic left coupling (34.1), the magnetic left coupling (34.1) is connected to the on / off electromagnetic circuit i, and a permanent magnet right coupling (34.2) is fixed at the end of the chain storage roller shaft (21).

5. A coaxial dual-axis chain storage device for a fire-fighting circulating chain ladder in a high-rise building fire protection project as described in claim 4, characterized in that, The coupling mechanism (30) also includes a reverse drive, which includes a chain storage gear (31), a temporary gear (32) and a cylindrical gear (35). The chain storage gear (31) is fixed to the first rotating shaft (33), and the temporary gear (32) is fixed to the temporary gear (32). The temporary gear (32) and the chain storage gear (31) are arranged in parallel and simultaneously mesh with the cylindrical gear (35). The first rotating shaft (33) can be selectively connected to the chain storage roller shaft (21) through a coupling (34). The axis of the cylindrical gear (35) is perpendicular to the first rotating shaft and the chain storage rotating shaft.

6. The coaxial dual-axis chain storage device for the fire-fighting circulating chain ladder in high-rise building fire protection engineering as described in claim 4, characterized in that, The coupling mechanism (30) also includes a coaxial reversal mechanism (60), which includes a master gear (61) and a slave gear (62) spaced apart on the same master drive shaft (63). The master gear (61) includes a master sun gear (61.1), a master ring gear (61.2), and at least three master internal planet gears (61.3) and master external planet gears (61.4) meshing with each other. The slave gear (62) includes a slave sun gear (62.1), a slave ring gear (62.2), and at least three slave planet gears (62.3) meshing with each other. The master ring gear (61.2) and the slave ring gear (62.2) are fixedly connected to the inner wall of the transmission box. The master internal planet gear (61.3), the master external planet gear (61.4), and the slave planet gear (62.3) are rotatably mounted on the same planet carrier (64), which is connected to the slave drive shaft (65).

7. The coaxial dual-axis chain storage device for the fire-fighting circulating chain ladder in the fire protection engineering of high-rise buildings as described in any one of claims 1-6, characterized in that, The chain storage device switches between chain-down mode A, chain-up mode B, and chain-circulating mode C. In chain-down mode A, the brake of the chain-storage winding (20) is released, the brake of the temporary winding (10) is applied, the coupling mechanism (30) is decoupled, and the roller chain below the chain-storage winding (20) is released by the weight of the counterweight sprocket (28). The chain-storage roller shaft (21) rotates slowly to output the roller chain until the counterweight sprocket (28) is placed on the ground. In chain-up mode B, the brake of the chain-storage winding (20) is released, the brake of the temporary winding (10) is applied, the coupling mechanism (30) is decoupled, and the chain-storage roller shaft (21) is manually rotated by hand crank to drive the roller chain to wind onto the chain-storage roller shaft (21) until the counterweight sprocket (28) rises to the top of the building, and the chain-storage roller shaft (21) is braked.

8. The coaxial dual-axis chain storage device for the fire-fighting circulating chain ladder in the fire protection engineering of high-rise buildings as described in any one of claims 1-6, characterized in that, The chain storage device mainly operates in the circulating chain mode C. The chain storage winding (20) is coupled to the temporary winding (10) through the coupling mechanism (30). Every time the roller chain is wound or unwound by the chain storage roller (21), the temporary roller (11) unwound or wound the roller chain once. Thus, the length of the circulating chain ladder between the roof and the ground remains unchanged.

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