Slow descending device

Abstract

The utility model provides a slow descending device, and relates to the technical field of escape equipment, the slow descending device comprises a fixed part, a rotating shaft, an inhaul cable assembly, a friction plate, a moving piece, a friction part and an elastic piece, the fixed part can be arranged on a building vertical face or an escape platform and is in a fixed state, when the slow descending device is used, a safe hanging point or a supporting object does not need to be found indoors, and the safety of a user is ensured. The use is convenient; during escape, a user descends to escape through the inhaul cable, in the descending process, the inhaul cable drives the rotating shaft and the friction part to do first rotating motion, the moving piece moves towards the friction plate, the elastic piece is further compressed, the elastic force applied to the friction part towards the friction plate is increased, and then the kinetic friction force between the friction part and the friction plate is increased; and the friction part and the rotating shaft are prevented from rotating, so that the descending speed of the escape personnel is reduced, the escape personnel slowly descend, and safe and rapid descending escape is realized.

Description

[0001] This application claims priority to the Chinese patent application No. 202420117357.7, filed on January 17, 2024, and entitled "Escape platform and slow descent device", the entire content of which is incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the technical field of escape equipment, in particular to a slow descent device. BACKGROUND

[0003] When a high-rise building is in danger, the people inside the building often cannot escape quickly, especially in the case of fire, etc. The elevators inside the building cannot be used or are not suitable for use, and the speed and capacity of the safe passage (stairs) are weak, which greatly delays the escape of the personnel and easily causes serious safety hazards.

[0004] The existing high-rise escape products are basically that when a dangerous situation occurs, the personnel need to find a safe hanging point or support in the room. However, it is not easy to find or even impossible to find in the current buildings, and some escape products are heavy and difficult to wear, and the descent speed is difficult to control, making it difficult to achieve safe and rapid escape. CONTENT OF THE INVENTION

[0005] The embodiment of the present application provides a slow descent device, which is fixed on the facade of a building. A user descends and escapes through a cable assembly. In the descending process, the cable assembly drives the rotating shaft and the friction part to make a first rotating motion. The moving part moves towards the direction of the friction plate, so that the elastic part is further compressed, the elastic force applied by the friction part to the direction of the friction plate is increased, and the dynamic friction between the friction part and the friction plate is increased, thereby hindering the rotation of the friction part and the rotating shaft, and further reducing the descent speed of the escape personnel. The present application solves the problem that the existing high-rise escape products require personnel to find a safe hanging point or support in the room during use, which leads to inconvenient use and makes it difficult to achieve safe and rapid escape.

[0006] In a first aspect, the embodiment of the present application provides a slow descent device, which includes a fixed part, a rotating shaft, a cable assembly, a friction plate, a moving part, a friction part, and an elastic part.

[0007] The fixed part is arranged on the facade of a building or an escape platform.

[0008] The rotating shaft is rotatably connected with the fixed part.

[0009] The cable assembly is arranged on the rotating shaft, and the cable assembly is connected with the rotating shaft. When an escape personnel descends through the cable assembly, the cable assembly drives the rotating shaft to make a first rotating motion.

[0010] The friction plate is fixed on the fixed part.

[0011] The moving piece is arranged on the rotating shaft, and when the rotating shaft performs the first rotating motion, the moving piece moves towards the friction plate;

[0012] The friction part is in sliding connection with the rotating shaft and is located between the friction plate and the moving piece, and the friction part rotates synchronously with the rotating shaft;

[0013] The elastic piece is arranged between the moving piece and the friction part, and the two ends of the elastic piece in the extension direction are respectively in abutment with the moving piece and the friction part, so that the friction part abuts against the friction plate.

[0014] In a feasible implementation, the slow descending device further comprises a first guide piece, and the first guide piece is arranged on the fixed part or the escape platform;

[0015] The outer wall of the rotating shaft is provided with external threads, the moving piece is in screw connection with the external threads of the rotating shaft, and the first guide piece is in sliding connection with the moving piece;

[0016] When the rotating shaft performs the first rotating motion, the moving piece moves towards the friction plate under the action of the first guide piece.

[0017] In a feasible implementation, the first guide piece is provided with a first guide limiting part, the extension direction of the first guide limiting part is parallel to the extension direction of the rotating shaft, the outer wall of the moving piece is provided with a second guide limiting part, and the second guide limiting part is in sliding connection with the first guide limiting part.

[0018] In a feasible implementation, the first guide limiting part and the second guide limiting part are detachably connected;

[0019] When the first guide limiting part and the second guide limiting part are separated, the moving piece can rotate freely.

[0020] In a feasible implementation, the first guide limiting part comprises a first guide part and a first limiting part, and the first guide part and the first limiting part are fixedly connected;

[0021] The first guide piece is provided with a second guide part, the extension direction of the second guide part is parallel to the axis direction of the rotating shaft, and the first guide part is in sliding connection with the second guide part;

[0022] The second guide limiting part comprises a second limiting part, the second limiting part is arranged on the moving piece, and the first limiting part is connected with the second limiting part.

[0023] In an implementation, the first guide part is a rod body, and the first limiting part is an external screw rod fixedly connected with the rod body.

[0024] The second guide part is a through slot, and the extending direction of the through slot is parallel to the extending direction of the rotating shaft. The outer wall of the rod body is in sliding connection with the inner wall of the through slot.

[0025] The second limiting part is an internal screw ring arranged on the moving part, and the outer wall of the external screw rod is in screw connection with the inner wall of the internal screw ring.

[0026] In an implementation, the first guide part is a sliding block, and the first limiting part is an insertion rod fixedly connected with the sliding block.

[0027] The second guide part is a sliding groove, and the extending direction of the sliding groove is parallel to the extending direction of the rotating shaft. The sliding block is in sliding connection with the sliding groove.

[0028] The second limiting part is a limiting ring arranged on the moving part, and the insertion rod is in insertion connection with the limiting ring.

[0029] In an implementation, the fixed part includes a first fixed part and a second fixed part.

[0030] The first fixed part is arranged on the facade of the building, the rotating shaft is in rotating connection with the first fixed part, and the first guide part is arranged on the first fixed part.

[0031] The second fixed part is detachably connected with the first fixed part, and the friction plate is fixedly arranged on the second fixed part.

[0032] The distance between the friction plate and the moving part can be adjusted by adjusting the position of the second fixed part on the first fixed part.

[0033] In an implementation, the first fixed part is provided with a plurality of first connecting parts, and the first connecting parts are uniformly distributed along a first straight line parallel to the extending direction of the rotating shaft.

[0034] The second fixed part is provided with a second connecting part, and a fastener connects the second connecting part and any first connecting part, so that the second fixed part is fixed on the first fixed part.

[0035] In an implementation, the slow descent device further includes:

[0036] A first limiting part arranged on the fixed part or the escape platform.

[0037] A second guide member in sliding connection with the limiting member, the movement direction of the second guide member being parallel to the axis of the rotating shaft;

[0038] The outer wall of the rotating shaft is provided with external threads, the moving member is screwed with the external threads of the rotating shaft, and the second guide member is fixedly connected with the moving member;

[0039] When the rotating shaft makes the first rotational movement, the moving member moves towards the friction plate under the action of the second guide member.

[0040] In a feasible implementation, the first limiting member is provided with a third guide limiting part;

[0041] The second guide member comprises a fourth guide limiting part and a third connecting part, the fourth guide limiting part and the third connecting part are fixedly connected, the fourth guide limiting part is in sliding connection with the third guide limiting part, and the third connecting part is connected with the moving member.

[0042] In a feasible implementation, the third connecting part is detachably connected with the moving member;

[0043] When the third connecting part is separated from the moving member, the moving member can rotate freely.

[0044] In a feasible implementation, the cable assembly comprises a cable and a rotating disc;

[0045] The rotating disc is sleeved with the rotating shaft and fixedly connected with the rotating shaft, and the cable is wound on the rotating disc;

[0046] When the escape personnel descend through the cable, the cable drives the rotating disc and the rotating shaft to make the first rotational movement.

[0047] The application provides a kind of slow descent device, slow descent device includes fixed part, rotating shaft, cable assembly, friction plate, moving member, friction part and elastic member, fixed part is set on building facade, in fixed state, when using this slow descent device, it is not necessary to find safe hanging point or support in room, convenient to use;

[0048] When escaping, the user descends and escapes through the cable, in the descending process, the cable drives the rotating shaft and the friction part to make the first rotational movement, the moving member moves towards the friction plate, so that the elastic member is further compressed, the elastic force applied to the friction part towards the friction plate direction increases, and the dynamic friction force between the friction part and the friction plate is increased, the rotation of the friction part and the rotating shaft is hindered, and the descending speed of the escape personnel is reduced, so that the escape personnel slow down, and safe and rapid descent is realized. BRIEF DESCRIPTION OF DRAWINGS

[0049] Figure 1 A first schematic view of an escape platform provided for an embodiment of the present application;

[0050] Figure 2 A second schematic view of an escape platform provided for an embodiment of the present application;

[0051] Figure 3 A third schematic view of an escape platform provided for an embodiment of the present application;

[0052] Figure 4 A fourth schematic view of an escape platform provided for an embodiment of the present application;

[0053] Figure 5 A fifth schematic view of an escape platform provided for an embodiment of the present application;

[0054] Figure 6 A sixth schematic view of an escape platform provided for an embodiment of the present application;

[0055] Figure 7 A seventh schematic view of an escape platform provided for an embodiment of the present application;

[0056] Figure 8 A first structural schematic view of a slow descent device provided for the present application;

[0057] Figure 9 A second structural schematic view of a slow descent device provided for the present application;

[0058] Figure 10 A third structural schematic view of a slow descent device provided for the present application.

[0059] Explanation of reference numerals:

[0060] 1 - fixed frame; 11 - side frame; 111 - first accommodating space; 112 - second accommodating space; 12 - second sealing body; 13 - second locking part; 131 - hinged structure; 2 - manual switch; 21 - protection structure; 3 - restoring device; 4 - bearing platform; 41 - first sealing body; 42 - first locking part; 5 - cable-stayed part; 6 - guardrail; 7 - centrifugal slow descent device; 71 - slow descent cable; 72 - connecting end; 8 - connecting part; 9 - fireproof heat insulation curtain;

[0061] 710 - fixed part; 720 - rotating shaft; 730 - cable assembly; 740 - friction plate; 750 - moving part; 760 - friction part; 770 - elastic part; 780 - first guide part; 790 - second guide part;

[0062] 711-first fixed part; 712-second fixed part; 713-first limiting part; 714-third guiding limiting part; 731-pulley cable; 732-rotating disc; 751-second guiding limiting part; 781-first guiding limiting part; 791-fourth guiding limiting part; 792-third connecting part. DETAILED DESCRIPTION

[0063] In order to make the personnel in the technical field better understand the technical solutions in the present application, the technical solutions in the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor should fall within the scope of protection of the present application.

[0064] The escape platform is arranged for forming a platform structure for escaping on the surface of the building outer wall when a dangerous situation occurs. The existing building is usually provided with flat-open, sliding, upper-suspended and lower-suspended windows for lighting and ventilation, but due to the small opening and small opening area of the window sash, the opened window cannot form a platform for people to gather, which greatly reduces the escape probability of the trapped person.

[0065] The escape platform involved in the present application can be arranged at a position convenient for escaping on each floor of the building, and the platform can be used as a part of the building when closed, and can also be used to realize the functions of lighting, ventilation and smoke exhaust of the window; when opened, a platform is formed on the building facade, which has a certain bearing capacity, and the escape personnel can gather on the platform to wait for rescue or use the centrifugal slow descent device to descend to a safe position to escape from danger.

[0066] As Figures 1-7 The escape platform provided by the embodiment of the present application is installed in the opening of the building, and the position of the escape platform needs to be ensured to meet the requirements of the facade effect of the building. The escape platform comprises a bearing platform 4 and a fixed frame 1, the fixed frame 1 is arranged on the opening of the building facade, the bearing platform 4 is movably connected with the fixed frame 1, a manual switch 2 is arranged on the side of the fixed frame 1 in the room, the manual switch 2 is provided with a protection structure 21, the manual switch 2 is sealed in the protection structure 21 under normal circumstances to avoid being accidentally touched, and when used, the protection structure 21 is opened or removed, and then the manual switch 2 can be operated.

[0067] The first sealing body 41 is arranged in the four side frames of the bearing platform 4, and is pressed and sealed with the second sealing body 12 arranged on the inner side of the fixed frame 1 when the bearing platform 4 is in the closed state. The guardrail 6 is arranged on the bearing platform 4 and is located at the edge of the bearing platform 4, and is foldably hidden in the first containing space 111 of the two side frames 11 of the fixed frame 1, and is foldably hidden in the second containing space 112 of the upper frame of the fixed frame.

[0068] The cable-stayed component 5 is arranged between the two side frames of the bearing platform 4 and the two side frames 11 of the fixed frame 1, and is hidden in the first containing space 111 of the two side frames 11 of the fixed frame 1. The first locking part 42 is arranged on the side frame of the bearing platform 4, and forms a locking state with the second locking part 13 arranged on the side frame of the fixed frame.

[0069] After the bearing platform 4 is opened by the manual switch 2, the bearing platform 4 is connected with the lower frame of the fixed frame 1, so that the bearing platform 4 is rotated to the set position and stopped outside the room. Specifically, the connection and rotation can be realized by the hinged structure 131. When the bearing platform 4 is in the open state, the personnel needs to gather on the bearing platform 4 when escaping, and the bearing platform 4 should have a certain bearing capacity.

[0070] In order to ensure the safety of the escaping personnel, the bearing platform 4 forms a cantilever structure with the wall after being opened. The higher the escape hole is arranged, the longer the cantilever of the cantilever structure is, and the more difficult the bearing platform 4 is to bear. Therefore, the cable-stayed component 5 connected with the bearing platform 4 is arranged on both sides of the fixed frame 1 after the bearing platform 4 is opened, so as to enhance the bearing strength of the bearing platform 4.

[0071] The cable-stayed component 5 can be a rod structure and is provided with a limiting device. When the bearing platform 4 returns to the closed state, the cable-stayed component 5 is enabled to run in a specified direction and is arranged in the first containing space of the bearing platform 4 or the fixed frame 1. The cable-stayed component 5 can also be a telescopic component. When the bearing platform 4 is opened, the telescopic component is stretched or contracted to a set position. When the bearing platform 4 returns to the closed state, the telescopic component is arranged in the containing space of the bearing platform 4 or the fixed frame 1. The cable-stayed component 5 can also be a rope or chain component. When the bearing platform 4 is in the open state, the rope or chain component is stretched to a set position and stopped running. One end of the rope or chain component can be provided with a counterweight structure or a friction structure, so as to enable the bearing platform 4 to be slowly opened.

[0072] At this time, the bearing platform 4 has the escape function, but in order to ensure that the escape personnel on the bearing platform 4 do not fall, the side of the bearing platform 4 not connected with the wall body can be provided with a safety guardrail 6 when the bearing platform 4 is in an open state. When the bearing platform 4 is opened, the guardrail 6 is automatically raised to improve the safety of the bearing platform 4. A spring pneumatic telescopic device is arranged between the bearing platform 4 and the guardrail 6. Under the action of the pulling force or pushing force of the spring pneumatic telescopic device, the guardrail 6 is raised to a set height and locked during the opening of the bearing platform 4. An escape personnel uses a gap at the position of the guardrail of the bearing platform. After wearing the escape equipment, the escape personnel safely escapes through the gap without climbing over the guardrail to escape. The gap can be set in number and position according to the use.

[0073] The fixed frame 1 is further provided with a connecting part 8 of a backpack type centrifugal slow descent device. The escape personnel wears the escape backpack, the slow descent cable of the backpack type centrifugal slow descent device is connected with the connecting part 8, and the lifting of the backpack type centrifugal slow descent device is realized through the slow descent cable. Specifically, after the escape personnel wears the backpack type centrifugal slow descent device, the connecting end of the slow descent cable is connected with the connecting end of the connecting part 8. In actual use, the backpack type centrifugal slow descent device is slowed down under a certain gravity through a friction part. The slow descent cable is stored in a winch connected with the friction part. The whole component is installed in the backpack. The connecting end of the slow descent cable extends out of the backpack and is connected with the connecting part 8 arranged on the fixed frame 1. After the escape personnel fixes the backpack type centrifugal slow descent device on the body through the safety belt, the escape personnel can escape. The friction of the friction part can be adjusted. The adjustment of the friction can change the descending speed. The backpack type centrifugal slow descent device can be provided with a descending stopping device. The descending stopping device is manually controlled. The descending stopping device can press the friction part through a pressing structure to increase the friction. When the friction is greater than the gravity, the descending is stopped. The descending stopping device can also press the slow descent cable through the pressing structure to increase the friction. When the friction is greater than the gravity, the descending is stopped.

[0074] The escape platform is further provided with a recovery device 3. The recovery device 3 is arranged on the fixed frame 1. After the bearing platform 4 is opened to complete the escape task, the functions and components of the bearing platform 4 are checked. In the case that the functions and components of the bearing platform 4 are not damaged, the recovery device 3 can be used to manually restore the bearing platform 4 to a closed state from the indoor side. The locking is realized through the locking structure arranged on the fixed frame 1 and the bearing platform 4. After the bearing platform 4 is restored to the initial state, the bearing platform 4 can be repeatedly used.

[0075] Specifically, the rope component can be used to connect the restoring device 3 and the bearing platform 4, that is, one end of the rope component is connected to the bearing platform 4, the other end is connected to the rope wheel of the restoring device 3, and the rope wheel is controlled by the one-way movement principle of the pawl, that is, the corresponding tool of the pawl is used to rotate the rope wheel, so that the rope component is wound on the rope wheel, and the bearing platform 4 is pulled to restore to the initial state; a chain component can also be used, the chain is matched with the chain wheel, the chain is retracted by rotating the chain wheel, the retracted chain enters the accommodation space, and the bearing platform 4 is pulled to restore to the initial state and closed and locked; a lead screw structure can also be used to restore, the nut connected to the lead screw moves linearly by rotating the lead screw, the nut rope component, chain component or connecting rod component is linked with the escape platform, and the nut moves in the set direction to restore the escape platform to the initial state and lock.

[0076] The escape platform can also be provided with a centrifugal slow descending device 7, and the escape is realized through the centrifugal slow descending device 7. When in use, the escape personnel need to wear the escape safety harness, after wearing the safety harness, the safety harness is connected to the slow descending rope 71 of the centrifugal slow descending device 7, and can be slowly descended to a safe position or the ground to escape; the centrifugal slow descending device 7 is arranged on the indoor side wall, and the number thereof can be set to be multiple, and the connection end for connecting with the safety harness worn by the escape personnel extends out of the indoor side, so that the escape personnel can quickly escape after wearing the safety harness and connecting with the connection end of the centrifugal slow descending device.

[0077] The centrifugal slow descending device 7 can also be arranged on the fixed frame 1, and the number thereof can be set to be multiple, and the connection end 72 of the centrifugal slow descending device 7 arranged on the fixed frame 1 also extends out of the indoor side, so as to facilitate the escape personnel to quickly escape.

[0078] The centrifugal slow descending device 7 can also be arranged separately from the bearing platform 4, for example, a first connecting part and a third locking part connected with the centrifugal slow descending device 7 are arranged on the fixed frame 1 or the bearing platform 4, and the number of the first connecting part and the third locking part is at least one, after the bearing platform 4 is opened, the escape personnel fixes the centrifugal slow descending device 7 to the first connecting part, and locks through the third locking part, after the escape personnel wears the safety harness, the safety harness is connected with the connection end 72 of the centrifugal slow descending device, and it needs to be noted that the number of the above-mentioned first connecting part and the third locking part is set to be multiple, in the actual use process, multiple first connecting parts and third locking parts are not needed to be used at the same time to realize the escape function, but one pair of first connecting part and third locking part is needed to be used by one escape or one escape personnel, and multiple first connecting parts and third locking parts are arranged, on the one hand, to facilitate the escape personnel to fix the safety harness, and on the other hand, to facilitate multiple escape personnel to simultaneously perform the escape behavior.

[0079] The centrifugal slow descent device 7 can also be provided as a reciprocating structure, for example, each centrifugal slow descent device 7 is provided with two second connecting parts, and the two second connecting parts cannot be used at the same time. When escaping, the first escapee uses one of the second connecting parts to descend to the safe position or the ground, and then takes off the escape backpack. At this time, the second escapee on the bearing platform 4 can use the other second connecting part to descend. When the second escapee descends, the connecting end 72 used by the first escapee with the escape backpack is recycled to the initial position on the bearing platform 4, and can be used again by the escapee. In this way, during the subsequent escape of the escapee, repeated fixing work is not required, and the escapee only needs to wear the escape backpack to quickly escape from the dangerous environment.

[0080] The escape platform can also be provided with a fireproof heat insulation curtain 9. The fireproof heat insulation curtain 9 is arranged on the indoor side of the upper edge frame of the fixed frame 1. The guide limiting piece of the fireproof heat insulation curtain 9 is arranged on the indoor side of the side edge frame 11 of the fixed frame 1. After the escapee reaches the bearing platform 4, the fireproof heat insulation curtain 9 can be manually pulled down, thereby forming a partition seal between the bearing platform 4 and the indoor side of the building. At this time, if there are still people who have not escaped to the bearing platform 4 in the room, the fireproof heat insulation curtain 9 can also be opened from the indoor side. After reaching the bearing platform 4, the fireproof heat insulation curtain 9 is closed again to form a partition layer, so that the space of the bearing platform 4 is safer, thereby gaining more escape time.

[0081] The fireproof heat insulation curtain 9 is rotated and contracted under the shaft of the containing space by the spring force. When the downward pulling force is greater than the spring force, the heat insulation curtain runs downward along the two side guide limiting pieces. The heat insulation curtain runs to the set position. The set position is provided with a locking structure. The locking structure can be opened from the indoor side and the outdoor side, so that the people who have not escaped to the escape platform can continue to hide and escape.

[0082] It should be noted that the centrifugal slow descent device 7 provided by the embodiment of the present application can also be used alone and is not limited to the building scene. It can also be used in other scenes with height difference, such as tower cranes, mountains, bridges, mines or ships.

[0083] Based on the foregoing escape platform, the specific structure of the centrifugal slow descent device 7 will be described in detail as follows.

[0084] Referring to Figures 8-9 The embodiment of the present application provides a slow descent device, that is, the slow descent device in the foregoing. The slow descent device comprises a fixed part 710, a rotating shaft 720, a cable assembly 730, a friction plate 740, a moving part 750, a friction part 760 and an elastic part 770.

[0085] As Figure 8As shown, the fixing part 710 can be a metal connecting seat, which includes a horizontally arranged fixing plate and a plurality of vertically arranged connecting plates, the fixing plate is fixed on the building facade or escape platform, and the plurality of connecting plates are vertically arranged on the fixing plate;

[0086] The rotating shaft 720 penetrates through the plurality of fixing plates of the fixing part 710 and is rotationally connected with the fixing part 710, the cable assembly 730 is sleeved with the rotating shaft 720 and is coaxially arranged with the rotating shaft 720, the cable assembly 730 is fixedly connected with the rotating shaft 720, when the escape personnel descends to escape through the cable assembly 730, the cable assembly 730 drives the rotating shaft 720 to make a first rotating motion, which can be a clockwise rotating motion;

[0087] The friction plate 740 is fixed on the fixing part 710, and the friction plate 740 can be of any shape; when the friction plate 740 is a ring-shaped friction plate, the friction plate 740 is sleeved with the rotating shaft 720;

[0088] The moving part 750 is arranged on the rotating shaft 720, and the moving part 750 can be a nut;

[0089] The friction part 760 is slidably sleeved outside the rotating shaft 720, the friction part 760 is of a ring-shaped structure, is sleeved with the rotating shaft 720, is located between the friction plate 740 and the moving part 750, is attached to the friction plate 740, and the friction part 760 rotates synchronously with the rotating shaft 720, the outer wall of the rotating shaft 720 can be provided with a limiting strip, the extending direction of the limiting strip is consistent with the axis of the rotating shaft 720, the inner end of the friction part 760 is provided with a limiting groove, and the limiting strip is clamped with the limiting groove, so that the friction part 760 rotates synchronously with the rotating shaft 720 and can slide on the rotating shaft 720 in a small amplitude;

[0090] The elastic part 770 is arranged between the moving part 750 and the friction part 760, the elastic part 770 can be a spring or an air cylinder, the two ends of the elastic part 770 in the extending direction are respectively abutted with the moving part 750 and the friction part 760, and the elastic part 770 is always in a compressed state, so that the friction part 760 is always attached to the friction plate 740;

[0091] The friction part 760 is attached to the friction plate 740, when the rotating shaft 720 drives the friction part 760 to make a first rotating motion, the friction part 760 and the friction plate 740 generate dynamic friction, which hinders the rotating shaft 720 from rotating, and further hinders the rotating disc 732 from rotating, thereby reducing the descending speed of the escape personnel; and with the rotation of the rotating shaft 720, the moving part 750 gradually moves towards the friction plate 740, the elastic part 770 is further compressed, the elastic force applied by the elastic part 770 to the friction part 760 is increased, the pressure between the friction part 760 and the friction plate 740 is increased, and the dynamic friction force between the friction part 760 and the friction plate 740 is increased, thereby improving the damping deceleration effect.

[0092] In some embodiments, the slow descent device 7 further comprises a first guide 780;

[0093] The outer wall of the rotating shaft 720 is provided with external threads, and the moving piece 750 is screwed with the external threads of the rotating shaft 720;

[0094] The first guide 780 is arranged on the fixed part 710 or the escape platform, and the first guide 780 can be a rod, a column or a sliding rail. The outer wall of the first guide 780 is provided with a first guide limiting part 781, and the extending direction of the first guide limiting part 781 is consistent with the axial direction of the rotating shaft 720. The outer wall of the moving piece 750 is provided with a second guide limiting part 751, and the second guide limiting part 751 is in sliding connection with the first guide limiting part 781, so that the moving piece 750 cannot rotate but can only move along the axial direction of the rotating shaft 720;

[0095] When the rotating shaft 720 makes a first rotating motion, the moving piece 750 cannot make a synchronous rotating motion, and the moving piece 750 moves to the direction close to the friction sheet 740 under the action of the first guide 780, so that the elastic piece 770 is further compressed, the elastic force of the friction part 760 is increased, the dynamic friction force between the friction part 760 and the friction sheet 740 is increased, and the first rotating motion of the friction part 760 is hindered. The length of the first guide 780 can be set to control the maximum dynamic friction force between the friction part 760 and the friction sheet 740.

[0096] Further, the first guide limiting part 781 and the second guide limiting part 751 are detachably connected;

[0097] When the first guide limiting part 781 and the second guide limiting part 751 are separated, the moving piece 750 can freely rotate, so as to adjust the compression degree of the elastic piece 770 and further adjust the dynamic friction force between the friction part 760 and the friction sheet 740.

[0098] In an embodiment, the first guide limiting part comprises a first guide part and a first limiting part, and the first guide part and the first limiting part are fixedly connected;

[0099] The first guide part is provided with a second guide part, and the extending direction of the second guide part is parallel to the axial direction of the rotating shaft. The first guide part and the second guide part are in sliding connection;

[0100] The second guide limiting part comprises a second limiting part, and the second limiting part is arranged on the moving piece. The first limiting part and the second limiting part are connected.

[0101] Specifically, the first guide part is a rod, the first limiting part is an external screw rod, the external screw rod is fixedly connected with the rod, the external screw rod is a vertical rod with threads on the outer wall, the second guide part is a through groove, the extending direction of the through groove is parallel to the extending direction of the rotating shaft 720, and the outer wall of the rod is in sliding connection with the inner wall of the through groove;

[0102] The second limiting part is an inner screw ring, which is a ring body with threads on the inner wall, and is arranged on the moving part;

[0103] The outer wall of the outer screw rod is screwed with the inner wall of the inner screw ring;

[0104] The rod body and the outer screw rod can only slide in the through groove, so when the escapee descends through the cable assembly 730, the cable assembly 730 drives the rotating shaft 720 and the friction part 760 to make a first rotating motion, the outer wall of the outer screw rod is clamped with the inner wall of the through groove, so that the moving part 750 cannot rotate synchronously with the rotating shaft 720, the moving part 750 moves towards the friction part 760, the outer screw rod slides in the through groove, the elastic part 770 is further compressed, the elastic force on the friction part 760 is increased, the dynamic friction between the friction part 760 and the friction plate 740 is increased, and the first rotating motion of the friction part 760 is hindered;

[0105] When the upper end of the outer screw rod is rotated to separate the outer screw rod from the inner screw ring, the moving part 750 can be freely rotated to adjust the dynamic friction between the friction part 760 and the friction plate 740.

[0106] In another embodiment, the first guide part is a sliding block, the first limiting part is a plug rod, the plug rod is fixedly connected with the sliding block, the second guide part is a sliding groove, the extension direction of the sliding groove is parallel to the extension direction of the rotating shaft 720, and the outer wall of the sliding block is slidingly connected with the inner wall of the sliding groove;

[0107] The second limiting part is a limiting ring, which is a vertically arranged ring body, and is arranged on the moving part;

[0108] The outer wall of the plug rod is inserted with the inner wall of the limiting ring;

[0109] The sliding block can only slide in the sliding groove, so when the escapee descends through the cable assembly 730, the cable assembly 730 drives the rotating shaft 720 and the friction part 760 to make a first rotating motion, the outer wall of the sliding block is clamped with the inner wall of the sliding groove, so that the moving part 750 cannot rotate synchronously with the rotating shaft 720, the moving part 750 moves towards the friction part 760, the plug rod slides in the sliding groove, the elastic part 770 is further compressed, the elastic force on the friction part 760 is increased, the dynamic friction between the friction part 760 and the friction plate 740 is increased, and the first rotating motion of the friction part 760 is hindered;

[0110] When the sliding block is pulled out upwards to separate the plug rod from the limiting ring, the moving part 750 can be freely rotated to adjust the dynamic friction between the friction part 760 and the friction plate 740.

[0111] As shown in Figure 9 The fixed part 710 includes a first fixed part 711 and a second fixed part 712;

[0112] The first fixing part 711 can be an F-shaped plate body, the first fixing part 711 is arranged on the facade of the building, the rotating shaft is rotationally connected with the first fixing part 711, and the first guide member is arranged on the first fixing part 711;

[0113] The second fixing part 712 can be an L-shaped plate body, the second fixing part 712 is detachably connected with the first fixing part 711, and the friction plate is fixedly arranged on the second fixing part 712;

[0114] By adjusting the position of the second fixing part 712 on the first fixing part 711, the distance between the friction plate and the moving member can be adjusted, the compression degree of the elastic member 770 is adjusted, the pressure of the friction part 760 on the friction plate 740 is adjusted, and the dynamic friction force between the friction part 760 and the friction plate 740 is adjusted.

[0115] Specifically, the first fixing part 711 is provided with a first connecting hole, the first connecting hole can be a vertical through hole, and a plurality of first connecting holes are uniformly distributed along a first straight line, the first straight line is parallel to the extension direction of the rotating shaft;

[0116] The second fixing part 712 is provided with a second connecting hole, the second connecting hole is matched with the first connecting hole, a fastener connects the second connecting hole and any first connecting hole, and the fastener can be a bolt, so that the second fixing part 712 is fixed on the first fixing part 711;

[0117] By connecting the second connecting hole and different first connecting holes through the bolt, the position of the second fixing part 712 on the first fixing part 711 can be adjusted.

[0118] Referring to Figure 10 In some embodiments, the slow descent device further comprises a first limiting member 713 and a second guide member 790;

[0119] The first limiting member 713 is a fixed member, the first limiting member 713 is arranged on the fixing part or the escape platform, and the first limiting member 713 can be part of the fixing part;

[0120] The second guide member 790 is in sliding connection with the limiting member, and the movement direction of the second guide member 790 is parallel to the axis of the rotating shaft;

[0121] The outer wall of the rotating shaft is provided with an external thread, the moving member is in threaded connection with the external thread of the rotating shaft, and the second guide member 790 is fixedly connected with the moving member;

[0122] When the rotating shaft makes the first rotating motion, because the second guide piece 790 can only move along the axis direction of the rotating shaft 720, and the second guide piece 790 is fixedly connected with the moving piece, the moving piece cannot rotate synchronously with the rotating shaft, so that the moving piece moves towards the friction plate, so that the elastic piece 770 is further compressed, the elastic force of the friction part 760 is increased, the dynamic friction force between the friction part 760 and the friction plate 740 is increased, and the friction part 760 is hindered to make the first rotating motion. The length of the second guide piece 790 can be set to control the maximum dynamic friction force between the friction part 760 and the friction plate 740.

[0123] Further, the first limiting piece 713 is provided with a third guide limiting part 714, as shown in Figure 10 , the third guide limiting part 714 is a through hole, the central axis of the through hole is parallel to the axis of the rotating shaft 720, of course, the third guide limiting part 714 can also be a sliding groove, a sliding rail, a guide hole and the like;

[0124] The second guide piece 790 includes a fourth guide limiting part 791 and a third connecting part 792, and the fourth guide limiting part 791 and the third connecting part 792 are fixedly connected;

[0125] The fourth guide limiting part 791 is slidably connected with the third guide limiting part 714, as shown in Figure 8 , the fourth guide limiting part 791 is inserted with the through hole, when the third guide limiting part 714 is a sliding groove or a sliding rail, the fourth guide limiting part 791 can be a sliding block, when the third guide limiting part 714 is a guide hole, the fourth guide limiting part 791 can be a guide rod body; the third connecting part 792 is connected with the moving piece.

[0126] Further, the third connecting part 792 is detachably connected with the moving piece;

[0127] The third connecting part 792 can be a screw rod, and the outer wall of the moving piece is provided with a screw hole, the screw rod is screwed with the screw hole, so as to realize the detachable connection between the third connecting part 792 and the moving piece. When the third connecting part 792 is separated from the moving piece, the moving piece can rotate freely, so as to adjust the compression degree of the elastic piece 770, and further adjust the dynamic friction force between the friction part 760 and the friction plate 740.

[0128] Referring to Figure 8 and Figure 9 , in some embodiments, the cable assembly 730 includes a cable 731 and a rotating disc 732;

[0129] The rotating disc 732 is sleeved with the rotating shaft 720 and is fixedly connected with the rotating shaft 720, and the rotating disc 732 and the rotating shaft 720 rotate synchronously and at the same speed;

[0130] The cable 731 can be a cable, the cable 732 is wound on the rotating disc 732, and the outer end of the cable 731 is provided with a connecting part;

[0131] When the escape personnel descend through the rope 731, the rope 731 drives the rotating disc 732 and the rotating shaft 720 to make a first rotating movement.

[0132] The above detailed description of the embodiments of the present application has further explained the purposes, technical solutions and beneficial effects of the present application. It should be understood that the above is only a detailed description of the embodiments of the present application and is not used to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made on the basis of the technical solutions of the present application should be included in the protection scope of the present application.

[0133] It is easy to understand that the skilled in the art can combine, split, recombine, etc. the embodiments of the present application on the basis of the several embodiments provided by the present application to obtain other embodiments, and these embodiments do not exceed the protection scope of the present application.

[0134] The above detailed description of the embodiments of the present application has further explained the purposes, technical solutions and beneficial effects of the present application. It should be understood that the above is only a detailed description of the embodiments of the present application and is not used to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made on the basis of the technical solutions of the present application should be included in the protection scope of the present application.

Claims

1. A slow descent device characterized by: The device comprises: a fixed part arranged on a building facade or an escape platform; a rotating shaft rotatably connected to the fixed part; a cable assembly arranged on the rotating shaft, the cable assembly being connected to the rotating shaft, and when a person escaping from the building descends through the cable assembly, the cable assembly drives the rotating shaft to make a first rotating motion; a friction plate fixed to the fixed part; a moving part arranged on the rotating shaft, the moving part moving towards the friction plate when the rotating shaft makes the first rotating motion; a friction part slidably connected to the rotating shaft and located between the friction plate and the moving part, the friction part rotating synchronously with the rotating shaft; a resilient part arranged between the moving part and the friction part, the resilient part having two ends respectively abutting against the moving part and the friction part, so that the friction part abuts against the friction plate.

2. The device according to claim 1, further comprising a first guide part arranged on the fixed part or the escape platform; an outer wall of the rotating shaft is provided with an external thread, the moving part is screwed with the external thread of the rotating shaft, and the first guide part is slidably connected with the moving part; when the rotating shaft makes the first rotating motion, the moving part moves towards the friction plate under the action of the first guide part.

3. The device according to claim 2, wherein: the first guide part is provided with a first guide limiting part, the extending direction of the first guide limiting part is parallel to the extending direction of the rotating shaft, an outer wall of the moving part is provided with a second guide limiting part, and the second guide limiting part is slidably connected with the first guide limiting part.

4. The device according to claim 3, wherein: the first guide limiting part and the second guide limiting part are detachably connected; when the first guide limiting part and the second guide limiting part are separated, the moving part can freely rotate.

5. The device according to claim 4, wherein: the first guide limiting part comprises a first guide part and a first limiting part, and the first guide part and the first limiting part are fixedly connected; the first guide part is provided with a second guide part, the extending direction of the second guide part is parallel to the axial direction of the rotating shaft, and the first guide part is slidably connected with the second guide part; the second guide limiting part comprises a second limiting part, the second limiting part is arranged on the moving part, and the first limiting part is connected with the second limiting part.

6. The device according to claim 5, wherein: the first guide part is a rod body, the first limiting part is an external screw rod, and the external screw rod is fixedly connected with the rod body; the second guide part is a through slot, the extending direction of the through slot is parallel to the extending direction of the rotating shaft, and an outer wall of the rod body is slidably connected with an inner wall of the through slot; the second limiting part is an internal screw ring, the internal screw ring is arranged on the moving part, and an outer wall of the external screw rod is screwed with an inner wall of the internal screw ring.

7. The device according to claim 5, wherein: ​ The first guide part is a sliding block, and the first limiting part is a plug rod, which is fixedly connected with the sliding block; The second guide part is a sliding groove, the extending direction of the sliding groove is parallel to the extending direction of the rotating shaft, and the sliding block is in sliding connection with the sliding groove; The second limiting part is a limiting ring, which is arranged on the moving part, and the plug rod is in plug connection with the limiting ring.

8. The device according to any one of claims 2-7, characterized in that: The fixed part comprises a first fixed part and a second fixed part; The first fixed part is arranged on the facade of the building, the rotating shaft is in rotational connection with the first fixed part, and the first guide part is arranged on the first fixed part; The second fixed part is detachably connected with the first fixed part, and the friction plate is fixedly arranged on the second fixed part; The distance between the friction plate and the moving part can be adjusted by adjusting the position of the second fixed part on the first fixed part.

9. The device according to claim 8, characterized in that: A plurality of first connecting parts are arranged on the first fixed part, and the first connecting parts are uniformly distributed along a first straight line, which is parallel to the extending direction of the rotating shaft; A second connecting part is arranged on the second fixed part, and a fastener connects the second connecting part and any first connecting part, so that the second fixed part is fixed on the first fixed part.

10. The device according to claim 1, characterized in that: The device further comprises: A first limiting part arranged on the fixed part or the escape platform; A second guide part in sliding connection with the limiting part, the movement direction of the second guide part is parallel to the axis of the rotating shaft; An outer thread is arranged on the outer wall of the rotating shaft, the moving part is in screw connection with the outer thread of the rotating shaft, and the second guide part is fixedly connected with the moving part; When the rotating shaft makes a first rotational movement, the moving part moves towards the friction plate under the action of the second guide part.

11. The device according to claim 10, characterized in that: A third guide limiting part is arranged on the first limiting part; The second guide part comprises a fourth guide limiting part and a third connecting part, the fourth guide limiting part and the third connecting part are fixedly connected, the fourth guide limiting part is in sliding connection with the third guide limiting part, and the third connecting part is connected with the moving part.

12. The device according to claim 11, characterized in that: The third connecting part is detachably connected with the moving part; When the third connecting part is separated from the moving part, the moving part can rotate freely.

13. The device according to claim 1, characterized in that: The cable assembly comprises a cable and a rotating disc; The rotating disc is connected with the rotating shaft and is fixedly connected with the rotating shaft, and the cable is wound on the rotating disc; When the escape personnel descends through the cable, the cable drives the rotating disc and the rotating shaft to make the first rotational movement.

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