High-altitude multi-person circulation emergency glide device and system

Abstract

This invention relates to the technical field of devices for lowering people from buildings or similar structures, and particularly to a high-altitude multi-person circulating emergency rappelling device and system. By fixing several reduction gear shaft assemblies, including gears and gear shafts, within a housing, gears with different pitch circle diameters mesh and drive each other. Combined with a rappelling flat belt threaded between the gear shafts, during an emergency rappelling, multiple people being rescued from the same or different floors only need to sequentially fix detachable buckle components to the rappelling flat belt to achieve the purpose of simultaneously rescuing multiple people using the same device. This greatly shortens rescue time, improves rescue efficiency, and effectively ensures the safety of those being rescued. During the rappelling process, those being rescued only need to pull down the free end of the rappelling flat belt that is not fixed to them. The meshing of gears with different pitch circle diameters and the friction between the rappelling flat belt and the gear shafts achieve deceleration and hovering.

Description

Technical Field

[0001] This invention relates to the field of devices for lowering people from buildings or similar structures, and more particularly to a high-altitude multi-person circulating emergency rappelling device and system. Background Technology

[0002] As society develops, buildings in cities are becoming increasingly taller. In the event of accidents such as fires or earthquakes, escape from these buildings becomes more difficult. In most cases, elevators are closed, and those attempting to escape by elevator may become trapped, increasing their risk of injury. Furthermore, stairwells are often crowded or blocked by smoke and debris, leading many to attempt to escape through windows without proper emergency equipment, which directly endangers their lives.

[0003] In addition, most current emergency rappelling devices only support single-person rappelling, resulting in slow rescue speeds. When a large number of people need rescue, it is easy to miss the best rescue opportunity, causing a large number of casualties. Summary of the Invention

[0004] To address at least one of the aforementioned technical problems, this invention proposes a high-altitude multi-person circulating emergency rappelling device and system, which utilizes several reduction gear shaft groups.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] This invention provides a high-altitude multi-person circulating emergency rappelling device, comprising:

[0007] abseiling webbing;

[0008] The housing has a receiving cavity, and its bottom is provided with a flat strap channel for the sliding flat strap to enter and exit.

[0009] A plurality of reduction gear shaft assemblies, the reduction gear shaft assembly including a gear shaft and gears symmetrically arranged at both ends of the gear shaft, the gears located on the same side of the gear shaft meshing with each other, and at least some of the gears having different pitch circle diameters to achieve speed reduction, and a rope channel for a sliding flat belt to pass through is formed between the gear shafts;

[0010] Two mounting plates are used to mount the reduction gear shaft assembly and divide the housing cavity into a first cavity for accommodating the gear shaft and a second cavity located on both sides of the first cavity for accommodating the gear.

[0011] Preferably, the reduction gear shaft assembly comprises six groups, including a first gear shaft assembly A and a first gear shaft assembly B installed perpendicular to the mounting plate and parallel to the width direction of the mounting plate, and a second gear shaft assembly, a third gear shaft assembly, a fourth gear shaft assembly, and a fifth gear shaft assembly arranged sequentially along the length direction of the mounting plate.

[0012] Preferably, the pitch circle diameters of the first gear A, first gear B, second gear and fourth gear corresponding to the first gear shaft group A, the first gear shaft group B, the second gear shaft group and the fourth gear shaft group are the same, and are larger than the pitch circle diameter of the fifth gear corresponding to the fifth gear shaft group, and smaller than the pitch circle diameter of the third gear corresponding to the third gear shaft group.

[0013] Preferably, the first gear A, the first gear B, the second gear, the third gear, the fourth gear, and the fifth gear mesh in sequence.

[0014] Preferably, it also includes two anti-torsion shafts located between the mounting plates near the opening of the flat belt channel. The anti-torsion shafts are perpendicular to the mounting plates and are arranged parallel to each other along the width direction of the mounting plates. A gap is left between the anti-torsion shafts for the sliding flat belt to pass through.

[0015] Preferably, the first gear shaft group A, the first gear shaft group B, the second gear shaft group, the third gear shaft group, the fourth gear shaft group, and the fifth gear shaft group correspond to the first gear shaft A, the first gear shaft B, the second gear shaft, the third gear shaft, the fourth gear shaft, and the fifth gear shaft, respectively.

[0016] The sliding flat belt is installed as follows: the sliding flat belt passes through the flat belt channel opening into the anti-torsion shaft space and the space between the sixth gear shaft A and the sixth gear shaft B, passes through the second gear shaft to the fifth gear shaft and below the first gear shaft A, passes through the space between the first gear shaft A and the first gear shaft B, passes through the space between the third gear shaft and the fourth gear shaft, the space between the second gear shaft and the third gear shaft, and the space between the first gear shaft and the second gear shaft from the right side of the fifth gear shaft, passes above the first gear shaft B and passes through the anti-torsion shaft space, and finally exits through the flat belt channel opening.

[0017] Preferably, the top of the housing is provided with a fixing part, the fixing part including a fixing ring, a threaded connecting post fixedly connected to the fixing ring, and a positioning pin for restricting the rotation of the threaded connecting post; the threaded connecting post is fixed to the housing through a threaded hole provided on the top of the housing, the threaded connecting post is provided with a positioning hole adapted to the positioning pin, and the end of the positioning pin is at least partially located in the positioning hole.

[0018] Preferably, the housing includes a box body and a box cover that snaps onto the box body, the two second cavities are filled with lubricating oil, and a sealing gasket for preventing leakage is provided between the box body and the box cover, with the first cavity and the second cavity forming a sealed space with the sealing gasket respectively.

[0019] A second aspect of the present invention provides a high-altitude multi-person circulating emergency rappelling system, including the high-altitude multi-person circulating emergency rappelling device as described in the first aspect and a buckle assembly that is detachably fixed to the rappelling webbing.

[0020] Preferably, the buckle assembly includes a buckle post and a buckle body. The upper part of the buckle body is bent inward to form an arc and has a transverse buckle groove. The lower part has a hanging hole for the safety hook to be hung. The buckle post is movably engaged with the buckle body. The inner side of the buckle groove has an inward arc. When the sliding flat strap passes through the upper part of the buckle post and exits the buckle groove, the buckle post is pressed into the buckle groove under the pressure of the sliding flat strap.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. This invention utilizes a plurality of reduction gear shaft assemblies, including gears and gear shafts, fixedly installed within the housing. Gears with different pitch circle diameters mesh with each other for transmission. In conjunction with a sliding flat belt threaded between the gear shafts, during emergency descent, multiple people being rescued from the same or different floors only need to sequentially fix detachable buckle components onto the sliding flat belt to achieve the purpose of simultaneously rescuing multiple people using the same device. This greatly shortens rescue time, improves rescue efficiency, and effectively ensures the safety of the rescued. During the descent, the rescued only needs to pull down the free end of the sliding flat belt that is not fixed to them. The deceleration and suspension are achieved through the meshing transmission of gears with different pitch circle diameters and the friction between the sliding flat belt and the gear shafts.

[0023] 2. In this invention, the circulating emergency rappelling device restricts the rappelling sling between two anti-torsion shafts by setting anti-torsion shafts, preventing the rappelling sling from getting tangled and improving the safety of the rescued person; by setting a fixing part on the top of the shell, it is easy to fix the device to the top of the building (including but not limited to high-rise residential buildings, office buildings, towers, etc.), and the positioning pin can prevent the shell and the fixing part from twisting, thereby causing the rescued person to rotate and be in an unstable state, which can effectively improve the safety of the device.

[0024] 3. The high-altitude multi-person circulating emergency rappelling device and system of the present invention adopts a purely mechanical principle to achieve safe deceleration and rappelling in emergency rescue. Its safety is higher and more controllable compared with automatic or semi-automatic rescue devices. Attached Figure Description

[0025] Figure 1 A three-dimensional diagram of a high-altitude multi-person circulating emergency rappelling device;

[0026] Figure 2 A three-dimensional perspective view of a high-altitude multi-person circulating emergency rappelling device;

[0027] Figure 3 A top view of a high-altitude multi-person circulating emergency rappelling device (without the cover);

[0028] Figure 4 A perspective view of a high-altitude multi-person circulating emergency rappelling device (without the cover);

[0029] Figure 5 An exploded view of a high-altitude multi-person circulating emergency rappelling device;

[0030] Figure 6 A perspective view of a high-altitude multi-person circulating emergency rappelling device (shell omitted);

[0031] Figure 7 A side view of a high-altitude multi-person circulating emergency rappelling device (shell omitted);

[0032] Figure 8 for Figure 7 Enlarged view of point A in the middle;

[0033] Figure 9 This is a schematic diagram of the sliding flat belt passing between the gear shafts in this invention;

[0034] Figure 10 This is a schematic diagram of the snap-fit ​​assembly structure in this invention;

[0035] Figure 11 This is a perspective view of the buckle assembly (bucket open state) in this invention;

[0036] Figure 12 for Figure 11 Enlarged view at point B in the middle;

[0037] Figure 13 This is a side view of the snap-fit ​​assembly in this invention.

[0038] In the diagram: 1. Shell; 101. Box body; 102. Box cover; 201. First gear shaft group A; 202. First gear shaft group B; 203. Second gear shaft group; 204. Third gear shaft group; 205. Fourth gear shaft group; 206. Fifth gear shaft group; 207. Anti-torsion shaft; 211. First gear shaft A; 212. First gear shaft B; 213. Second gear shaft; 214. Third gear shaft; 215. Fourth gear shaft; 216. Fifth gear shaft; 3. Sliding flat belt; 4. Flat belt channel opening; 5. Mounting plate; 6. First cavity; 7. Second cavity; 8. Fixing part; 801. Fixing ring; 802. Threaded connecting post; 803. Positioning pin; 9. Buckle assembly; 901. Buckle post; 902. Buckle body; 903. Buckle groove; 904. Hanging hole; 10. Snap ring. Detailed Implementation

[0039] To enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments of the present invention.

[0040] Please refer to Figure 1-9 As shown, in a first aspect, the present invention provides a high-altitude multi-person circulating emergency rappelling device, comprising: a rappelling webbing 3 and a housing 1, having a receiving cavity, the bottom of which is provided with a webbing channel opening 4 for the rappelling webbing 3 to pass through and exit.

[0041] A plurality of reduction gear shaft assemblies, each including a gear shaft and gears symmetrically arranged at both ends of the gear shaft, the gears on the same side of the gear shaft meshing with each other, and at least some of the gears having different pitch circle diameters to achieve speed reduction, and a rope track for the sliding flat belt 3 to pass through is formed between the gear shafts.

[0042] Two mounting plates 5 are used to mount the reduction gear shaft assembly and divide the housing 1 into a first cavity 6 for accommodating the gear shaft and a second cavity 7 located on both sides of the first cavity 6 for accommodating the gear.

[0043] In the above embodiments, by fixing several reduction gear shaft groups including gears and gear shafts inside the housing 1, the gears with different pitch circle diameters mesh with each other for transmission, and cooperate with the sliding flat belt 3 passing between the gear shafts, in the event of emergency descent, multiple people being rescued from the same floor or different floors only need to fix the detachable buckle assembly 9 to the sliding flat belt 3 in sequence to achieve the purpose of simultaneously rescuing multiple people in an emergency cycle using the same device, which greatly shortens the rescue time, improves the rescue efficiency, and effectively ensures the safety of the rescued people.

[0044] It should be noted that, according to the inventor's tests, during the descent, the person being rescued or the ground rescue personnel only need to apply a very small pulling force to the free end of the descent webbing 3, which is not fixed to the person being rescued, to achieve the person being rescued hovering in the air. This is likely because applying a pulling force to the free end of the descent webbing 3 increases the tension of the descent webbing 3 threaded between the gear shafts, thereby increasing the pressure between the descent webbing 3 and the gear shafts it contacts, leading to increased friction. In addition, the meshing of gears with different pitch circles in the reduction gear shaft assembly also causes this deceleration phenomenon.

[0045] To generate sufficient frictional resistance between the sliding flat belt 3 and the gear shaft, friction grooves are provided circumferentially on the surface of the gear shaft.

[0046] Because it is necessary to overcome the frictional resistance between the sling belt 3 and the gear shaft, through testing, the minimum critical load of the rescued person is about 11 kg and the maximum critical load is about 3 tons. When the weight of the rescued person is greater than 11 kg, the rescued person begins to slide down to the ground with the sling belt 3. It is foreseeable that the greater the weight, the faster the descent speed will be. Therefore, ground rescuers or the rescued person can appropriately control the free end of the sling belt 3 to achieve speed control and hovering in the air.

[0047] like Figure 2As shown, the reduction gear shaft assembly consists of six groups, including a first gear shaft assembly A201 and a first gear shaft assembly B202 that are perpendicular to the mounting plate 5 and parallel to the width direction of the mounting plate 5, and a second gear shaft assembly 213, a third gear shaft assembly 214, a fourth gear shaft assembly 215, and a fifth gear shaft assembly 216 that are sequentially arranged along the length direction of the mounting plate 5.

[0048] like Figure 5 As shown, in order to achieve a better deceleration effect, the pitch circle diameters of the first gear A, the first gear B, the second gear and the fourth gear corresponding to the first gear shaft group A201, the first gear shaft group B202, the second gear shaft group 213 and the fourth gear shaft group 215 are the same, and are larger than the pitch circle diameter of the fifth gear corresponding to the fifth gear shaft group 216, and smaller than the pitch circle diameter of the third gear corresponding to the third gear shaft group 214.

[0049] like Figure 7 As shown, the first gear A, the first gear B, the second gear, the third gear, the fourth gear, and the fifth gear mesh in sequence.

[0050] It should be noted that the number of reduction gear shaft groups, the installation method of the mounting plate 5, and the pitch circle diameter of each gear shaft group are only one configuration of the present invention. Those skilled in the art can change the number of reduction gear shaft groups, the installation method, and the pitch circle diameter of each gear according to the gear reduction principle to achieve the same effect.

[0051] like Figure 4 or Figure 6 As shown, in order to prevent the slings 3 from getting tangled together and improve the safety of the rescued person, two anti-torsion shafts 207 are also included, located between the mounting plates 5 near the sling channel opening 4. The anti-torsion shafts 207 are perpendicular to the mounting plates 5 and are arranged parallel to the width direction of the mounting plates 5. A gap is left between the anti-torsion shafts 207 for the slings 3 to pass through.

[0052] Obviously, increasing the number of anti-torsion shafts 207 arranged along the length of the mounting plate 5 is beneficial to improving the overall anti-torsion effect, but it will increase the cost accordingly. Therefore, in this embodiment, the number of anti-torsion shafts 207 is one set.

[0053] To facilitate the passage of the sliding flat belt 3, the gap between the anti-torsion shafts 207 should be slightly larger than the thickness of the stacked sliding flat belts 3.

[0054] For different numbers of reduction gear shaft groups, the way the sliding flat belt 3 is threaded may differ in order to achieve the reduction effect. In this invention, the first gear shaft group A201, the first gear shaft group B202, the second gear shaft group 213, the third gear shaft group 214, the fourth gear shaft group 215, and the fifth gear shaft group 216 correspond to the first gear shaft A211, the first gear shaft B212, the second gear shaft 213, the third gear shaft 214, the fourth gear shaft 215, and the fifth gear shaft 216, respectively.

[0055] like Figure 9 As shown, the path of the sliding flat belt 3 is as follows: The sliding flat belt 3 passes through the anti-torsion shaft 207 and the sixth gear shaft A and the sixth gear shaft B from the flat belt channel opening 4, passes through the second gear shaft 213 to the fifth gear shaft 216 and below the first gear shaft A211, passes through the first gear shaft A211 and the first gear shaft B212, passes through the third gear shaft 214 and the fourth gear shaft 215, the second gear shaft 213 and the third gear shaft 214, and the first gear shaft and the second gear shaft 213 in sequence from the right side of the fifth gear shaft 216, passes above the first gear shaft B212 and passes through the anti-torsion shaft 207, and finally exits from the flat belt channel opening 4.

[0056] The above-mentioned method of threading the sling 3, after repeated testing by the inventor, has shown that, during use, applying a small tension to the free end of the sling 3 can achieve the deceleration effect of suspending the rescued person in the air.

[0057] In order to achieve rappelling circulation, after the rappelling webbing 3 is installed, the head and tail of the rappelling webbing 3 should be connected. In this way, the rappelling webbing 3 can circulate between the gear shafts, thereby realizing the circular rescue of multiple people.

[0058] like Figure 4 As shown, in order to facilitate the fixing of this device, a fixing part 8 is provided on the top of the housing 1. The fixing part 8 includes a fixing ring 801, a threaded connecting post 802 fixedly connected to the fixing ring 801, and a positioning pin 803 for limiting the rotation of the threaded connecting post 802. The threaded connecting post 802 is fixed to the housing 1 through a threaded hole provided on the top of the housing 1. The threaded connecting post 802 is provided with a positioning hole adapted to the positioning pin 803. At least part of the end of the positioning pin 803 is located in the positioning hole.

[0059] The aforementioned fixing part 8 and the housing 1 are connected by a thread. The positioning pin 803 can prevent the housing 1 and the fixing part 8 from twisting, thereby causing the person being rescued to rotate and become unstable, effectively improving the safety of the device.

[0060] like Figure 3As shown, given that this device uses a purely mechanical principle to achieve safe deceleration and descent during emergency rescue, in order to minimize mechanical failures of the reduction gear shaft assembly during use, the two second cavities 7 are filled with lubricating oil. To prevent leakage of lubricating oil, a sealing gasket (not shown in the figure) is provided between the box body 101 and the box cover 102 for leak prevention. The first cavity 6 and the second cavity 7 respectively form a sealed space with the sealing gasket.

[0061] It should be noted that the sealing space formed by the second cavity 7 and the sealing gasket can not only ensure that the gear has enough lubricating oil to ensure its normal rotation, but also prevent the lubricating oil in the second cavity 7 from seeping into the first cavity 6, so that the sliding flat belt 3 passing between the gear shafts is soaked in gear oil.

[0062] Of course, to prevent the lubricating oil in the second cavity 7 from seeping into the first cavity 6, a leak-proof cap can be added to the second cavity 7 to ensure good sealing.

[0063] like Figure 8 To improve the stability of the gears, each of the above gears is fitted with a copper sleeve (not shown in the figure) between itself and the gear shaft, and the outer side is fixed by a snap ring 10 to improve the stability of gear meshing and overall durability.

[0064] like Figure 1 As shown, in order to improve the safety of the device, the housing 1 includes a box body 101 and a box cover 102 that is fastened to the box body 101. The box body 101 and the box cover 102 are fastened by a press-locking method, which can effectively avoid the problem of easy human disassembly due to conventional fastening methods such as bolts.

[0065] like Figure 10-13 As shown, the high-altitude multi-person circulating emergency rappelling device of the present invention can be used with various rappelling buckles that can be freely detached from and fixed with the rappelling sling 3 to form a high-altitude multi-person circulating emergency rappelling system.

[0066] This invention provides a simple, easy-to-use, and highly safe buckle assembly 9, specifically including a buckle post 901 and a buckle body 902. The buckle post 901 and the buckle body 902 are movably engaged. The upper part of the buckle body 902 is bent inward to form an arc and has a transverse buckle groove 903. The lower part has a hanging hole 904 for attaching a safety hook. The inner side of the buckle groove 903 has an inward arc. When the sliding flat strap 3 passes through the upper part of the buckle post 901 and exits the buckle groove 903, the buckle post 901 is pressed against the buckle groove 903 under the pressure of the sliding flat strap 3.

[0067] It should be noted that when the webbing 3 is not threaded, pressing the locking post 901 against the locking slot 903 creates a channel on both sides of the locking post 901 and the locking slot 903 for the webbing 3 to pass through. It is understood that, in order for the buckle assembly 9 to be fixed under the pressure of the webbing 3 and to bear the weight of the person being rescued, the width of the aforementioned channel should be less than the thickness of the webbing 3. Thus, under the pressure of the webbing 3, when the locking post 901 is pressed against the locking slot 903, because the gap between the locking post 901 and the locking slot 903 is less than the thickness of the webbing 3, the locking post 901 can exert sufficient pressure on the webbing 3, and the pressure increases relatively as the weight of the person being rescued increases.

[0068] To increase the friction between the locking post 901 and the rappelling webbing 3, ensuring the person being rescued is securely attached to the webbing 3, the surface of the locking post 901 is provided with friction texture. Additionally, the inner side of the locking groove 903 has an inward curvature, increasing the contact area between the rappelling webbing 3 and the locking groove 903, further increasing the pressure applied to the rappelling webbing 3 by the locking post 901. This allows the buckle assembly 9 to be relatively fixed to the rappelling webbing 3, ensuring the safety of the person being rescued.

[0069] To allow for quick installation and use of the bayonet assembly with the sliding webbing 3, one end of the locking post 901 can be movably fixed to the buckle body 902, such as... Figure 12 As shown, in this embodiment, through the mounting part provided on the buckle body 902, the other end of the buckle post 901 can rotate into the buckle groove 903 under the pressure of the sliding flat belt 3.

[0070] Given that the present invention is often used in fire rescue, in order to improve the safety of the rappelling sling 3, the rappelling sling 3 is preferably made of a fire-resistant and abrasion-resistant material.

[0071] The high-altitude multi-person circulating emergency rappelling device and system provided by this invention only requires fixing the device to the top of a building. When rescue is needed, the person being rescued can be rescued by using a buckle assembly or other fixing device that can be secured to the rappelling webbing to achieve the purpose of multi-person circulating rescue. Therefore, its application scenarios include, but are not limited to, high-rise residential buildings, office buildings, and towers.

[0072] The above description is a specific implementation of the embodiments of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A high-altitude multi-person circulating emergency rappelling device, characterized in that, include: Downhill webbing(3); The housing (1) has a receiving cavity and a flat strap channel (4) at its bottom for the sliding flat strap (3) to pass through and out. A plurality of reduction gear shaft groups, wherein the reduction gear shaft groups include gear shafts and gears symmetrically arranged at both ends of the gear shafts, the gears located on the same side of the gear shafts mesh with each other, and at least some of the gears have different pitch circle diameters to achieve reduction, and a rope channel for the sliding flat belt (3) to pass through is formed between the gear shafts; Two mounting plates (5) are used to mount the reduction gear shaft assembly and divide the housing (1) into a first cavity (6) for accommodating the gear shaft and a second cavity (7) located on both sides of the first cavity (6) for accommodating the gear. It also includes two anti-torsion shafts (207) located between the mounting plates (5) near the flat strip channel opening (4); The reduction gear shaft assembly consists of six groups, including a first gear shaft assembly A (201) and a first gear shaft assembly B (202) that are perpendicular to the mounting plate (5) and parallel to the width direction of the mounting plate (5), and a second gear shaft assembly (203), a third gear shaft assembly (204), a fourth gear shaft assembly (205), and a fifth gear shaft assembly (206) that are arranged sequentially along the length direction of the mounting plate (5). The pitch circle diameters of the first gear A (201), the first gear B (202), the second gear (203), and the fourth gear (205) are the same, and are larger than the pitch circle diameter of the fifth gear corresponding to the fifth gear (206), and smaller than the pitch circle diameter of the third gear corresponding to the third gear (204). The first gear A, the first gear B, the second gear, the third gear, the fourth gear, and the fifth gear mesh in sequence; The first gear shaft group A (201), the first gear shaft group B (202), the second gear shaft group (203), the third gear shaft group (204), the fourth gear shaft group (205), and the fifth gear shaft group (206) correspond to the first gear shaft A (211), the first gear shaft B (212), the second gear shaft (213), the third gear shaft (214), the fourth gear shaft (215), and the fifth gear shaft (216), respectively. The path of the sloping flat strip (3) is as follows: The sliding flat belt (3) passes through the flat belt channel opening (4) between the anti-torsion shafts (207), through the second gear shaft (213) to the fifth gear shaft (216) and below the first gear shaft A (211), passes between the first gear shaft A (211) and the first gear shaft B (212), passes sequentially from the right side of the fifth gear shaft (216) between the third gear shaft (214) and the fourth gear shaft (215), between the second gear shaft (213) and the third gear shaft (214), and between the first gear shaft B (212) and the second gear shaft (213), passes above the first gear shaft B (212) and passes between the anti-torsion shafts (207), and finally exits through the flat belt channel opening (4).

2. The high-altitude multi-person circulating emergency rappelling device according to claim 1, characterized in that, The anti-torsion shaft (207) is perpendicular to the mounting plate (5) and parallel to the width direction of the mounting plate (5). A gap is left between the anti-torsion shafts (207) for the sliding flat belt (3) to pass through.

3. The high-altitude multi-person circulating emergency rappelling device according to claim 2, characterized in that, The top of the housing (1) is provided with a fixing part (8), which includes a fixing ring (801), a threaded connecting post (802) fixedly connected to the fixing ring (801), and a positioning pin (803) for limiting the rotation of the threaded connecting post (802). The threaded connecting post (802) is fixed to the housing (1) through a threaded hole provided on the top of the housing (1). The threaded connecting post (802) is provided with a positioning hole adapted to the positioning pin (803). At least part of the end of the positioning pin (803) is located in the positioning hole.

4. The high-altitude multi-person circulating emergency rappelling device according to claim 3, characterized in that, The housing (1) includes a box body (101) and a box cover (102) that is fastened to the box body (101). The two second cavities (7) are filled with lubricating oil. A sealing gasket for preventing leakage is provided between the box body (101) and the box cover (102). The first cavity (6) and the second cavity (7) respectively form a sealed space with the sealing gasket.

5. A high-altitude multi-person circulating emergency rappelling system, characterized in that, It includes the high-altitude multi-person circulating emergency rappelling device as described in any one of claims 1-4 and the buckle assembly (9) that is detachably fixed to the rappelling sling (3).

6. The high-altitude multi-person circulating emergency rappelling system according to claim 5, characterized in that, The buckle assembly (9) includes a buckle post (901) and a buckle body (902). The upper part of the buckle body (902) is curved inward to form an arc and has a transverse buckle groove (903). The lower part has a hanging hole (904) for the safety hook to be hung. The buckle post (901) and the buckle body (902) are movably engaged. The inner side of the buckle groove (903) has an inward arc. When the sliding flat strap (3) passes through the upper part of the buckle post (901) and passes through the buckle groove (903), the buckle post (901) is pressed into the buckle groove (903) under the pressure of the sliding flat strap (3).

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