Pulley assembly, hanging operation device and flying hanging system

Abstract

The invention discloses a pulley assembly, a hanging operation device and a flight hanging system, and relates to the technical field of flight hanging. The pulley assembly comprises a pulley seat, a roller and an anti-torque arm, the roller is rotatably connected to the pulley seat, the peripheral side of the roller is used for being matched with the first lifting rope, one end of the anti-torque arm is connected to the pulley seat, the other end of the anti-torque arm is used for being in sliding fit with the first lifting rope, and a connecting structure used for being connected with an external object is arranged on the pulley seat. According to the pulley assembly, the torsion-resistant arm is arranged, so that the pulley assembly is not prone to torsion when hanging a hanging object or an operation device, the first lifting rope can be kept tangent to the rolling wheel of the pulley assembly, the rolling wheel can rotate smoothly all the time, the first lifting rope is not prone to abrasion or clamping stagnation, and the reliability of the pulley assembly is improved. Moreover, when the operation assembly is hung, random rotation of the operation assembly can be avoided, and therefore it is guaranteed that the orientation of the operation assembly is controllable, and operation can be achieved easily.

Description

Technical Field

[0001] The present application relates to the technical field of flight hoisting, and in particular to a pulley assembly, a hoisting operation device and a flight hoisting system. Background Art

[0002] In the prior art, when using aircraft to transport objects or lift working devices for related operations, the limited carrying capacity of the aircraft often results in limited transport capacity or significant restrictions on the weight of the working devices. Therefore, in related art, multiple aircraft are used to jointly lift objects or working devices. However, the arbitrary rotation of the working devices makes their orientation difficult to control, which is not conducive to operations. Summary of the Invention

[0003] The purpose of the present application includes providing a pulley assembly, a hanging working device and a flight hanging system, which can resist the torsion of the hung object, thereby maintaining the reliability of the pulley assembly and facilitating operation.

[0004] The embodiments of the present application can be implemented as follows: In the first aspect, the present application provides a pulley assembly, including a pulley seat, a roller and an anti-torsion arm, the roller being rotatably connected to the pulley seat, the outer peripheral side of the roller being used to cooperate with a first suspension rope, one end of the anti-torsion arm being connected to the pulley seat, the other end of the anti-torsion arm being used to slidably cooperate with the first suspension rope, and a connection structure for connecting an external object being provided on the pulley seat.

[0005] In an optional embodiment, the pulley assembly includes at least two anti-torsion arms, and one end of the two anti-torsion arms away from the pulley seat is respectively used for sliding cooperation with the first suspension ropes extending from both sides of the roller.

[0006] In an optional embodiment, a collar is provided at one end of the anti-torsion arm away from the pulley seat, and the collar is used for allowing the first suspension rope to pass through.

[0007] In an optional embodiment, the anti-torsion arm is rotatably connected to the pulley seat, and the rotation axis of the anti-torsion arm is parallel to the rotation axis of the roller.

[0008] In an optional embodiment, the pulley seat forms a pulley groove, at least a portion of the roller is accommodated in the pulley groove, and the pulley assembly further includes a rotating shaft passing through the pulley groove, and the roller rotates in conjunction with the rotating shaft.

[0009] In an optional embodiment, the pulley seat includes two end plates and a base plate, the two end plates are spaced apart in the axial direction of the roller, the rotating shaft is connected to the two end plates, the edge of the base plate is connected to the edges of the two end plates, and the base plate is bent into an arc shape around the rotation axis of the roller.

[0010] In an optional embodiment, a limiting groove for cooperating with the first suspension rope is provided on the outer peripheral side of the roller.

[0011] In an optional embodiment, the connection structure includes a stud, a screw hole or a hook.

[0012] In a second aspect, the present application provides a hanging working device, comprising a working component and a pulley assembly according to any one of the aforementioned embodiments, wherein the working component is connected to a connecting structure of a pulley seat of the pulley assembly.

[0013] In an optional embodiment, the operating component is a fire extinguishing component, which is used to spray fire extinguishing agent.

[0014] In an optional embodiment, the working component includes a tension detector, and the working component is connected to the pulley seat of the pulley assembly through the tension detector, and the tension detector is used to detect the tension load borne by the pulley assembly.

[0015] In a third aspect, the present application provides a flight suspension system, comprising the pulley assembly of any one of the embodiments of the first aspect, connected to a suspension object via a pulley seat of the pulley assembly; or comprising the suspension operation device of any one of the embodiments of the second aspect; The flight suspension system also includes a first suspension rope and at least two aircraft. The first suspension rope cooperates with the roller of the pulley assembly, and both ends of the first suspension rope are directly or indirectly connected to different aircraft.

[0016] In an optional embodiment, the flight suspension system includes at least four aircraft, and the flight suspension system also includes two second suspension ropes, the two ends of the first suspension rope are respectively connected between the two ends of the two second suspension ropes, and the two ends of the second suspension rope are respectively directly or indirectly connected to different aircraft.

[0017] In an optional embodiment, when the aircraft is in flight, the first suspension rope and the second suspension rope are coplanar.

[0018] The beneficial effects of the pulley assembly, the hanging operation device, and the flight hanging system provided by the embodiments of the present application include: The pulley assembly provided herein includes a pulley seat, a roller, and an anti-torsion arm. The roller is rotatably connected to the pulley seat, the outer periphery of the roller being adapted to engage with a first suspension rope. One end of the anti-torsion arm is connected to the pulley seat, and the other end of the anti-torsion arm is adapted to slideably engage with the first suspension rope. The pulley seat is provided with a connection structure for connecting to an external object. During use, when the pulley assembly and the suspended object are subjected to a torsion tendency, the anti-torsion arm, due to its connection to the pulley seat, also has a tendency to rotate. Because one end of the anti-torsion arm is connected to the first suspension rope, when the pulley assembly and the suspended object are subjected to torsion, the upper end of the anti-torsion arm abuts against the taut first suspension rope. The reaction force exerted by the taut first suspension rope on the anti-torsion arm resists the rotation of the anti-torsion arm, and thus, the rotation of the entire pulley assembly. Because the end of the anti-torsion arm slides with the first suspension rope, it does not affect the tangential movement of the first suspension rope along the roller, thereby maintaining the function of the pulley. The pulley assembly provided by the present application is less prone to twisting when suspending a suspended object or operating device. Therefore, the first suspension rope can be kept tangential to the roller of the pulley assembly, allowing the roller to rotate smoothly at all times. The first suspension rope is less likely to wear or become stuck, thereby improving the reliability of the pulley assembly. Furthermore, when suspending an operating component, the operating component can be prevented from rotating randomly, thereby ensuring that the orientation of the operating component is controllable, which is beneficial for achieving the desired operation.

[0019] The hanging operation device provided in the present application includes an operation component and the above-mentioned pulley component, and therefore has the advantages of good reliability and easy control of the operation.

[0020] The flight suspension system provided herein includes the aforementioned pulley assembly, which is connected to a suspended object via a pulley seat of the pulley assembly; or, alternatively, includes the aforementioned suspension operation device. The flight suspension system also includes a first suspension rope and at least two aircraft. The first suspension rope engages with a roller of the pulley assembly, and each end of the first suspension rope is directly or indirectly connected to a different aircraft. The flight suspension system has excellent reliability, is easy to coordinate and control, and is convenient to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 This is a schematic diagram of the cooperation between the first suspension rope and the pulley assembly in one embodiment of the present application; Figure 2 This is a cross-sectional view of a first suspension rope and pulley assembly in one embodiment of the present application; Figure 3This is a schematic diagram of a hanging operation device in the first embodiment of the present application; Figure 4 This is a cross-sectional view of the hanging operation device in the first embodiment of the present application; Figure 5 This is a schematic diagram of an adapter in one embodiment of the present application; Figure 6 This is a schematic diagram of the first connector in the first embodiment of the present application; Figure 7 This is a schematic diagram of the injection member in the first embodiment of the present application; Figure 8 This is a schematic diagram of a hanging operation device in the second embodiment of the present application; Figure 9 This is a cross-sectional view of the hanging operation device in the second embodiment of the present application; Figure 10 This is a schematic diagram of a flight suspension system arranged in a straight line in one embodiment of the present application; Figure 11 This is a schematic diagram of a quadrilateral arrangement of a flight suspension system in one embodiment of the present application.

[0023] Icons: 100 - hanging working device; 110 - pulley assembly; 111 - pulley seat; 1111 - end plate; 1112 - bottom plate; 1113 - connection structure; 112 - roller; 1121 - limit groove; 113 - anti-torsion arm; 1131 - collar; 114 - rotating shaft; 1141 - shaft sleeve; 1142 - second bearing; 115 - locking nut; 116 - mounting column; 120-fire extinguishing assembly; 121-adapter; 1211-inlet; 1212-outlet; 1213-locking screw hole; 1214-locking screw; 122-injection piece; 1221-second locking groove; 1222-second flange; 1223-second snap-fit ​​portion; 1224-second snap-fit ​​slot; 123-first joint; 1231-first locking groove; 1232-first flange; 1233-first snap-fit ​​portion; 1234-first snap-fit ​​slot; 124-second joint; 125-tension tester; 210-first lifting rope; 220-second lifting rope; 300-fire hose; 400-aircraft; 500-sliding device. DETAILED DESCRIPTION

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0026] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0027] In the description of this application, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the invented product is usually placed when in use. It is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on this application.

[0028] In addition, the terms "first", "second", etc., if used, are merely used to distinguish and describe, and should not be understood as indicating or implying relative importance.

[0029] It should be noted that, in the absence of conflict, the features in the embodiments of this application can be combined with each other.

[0030] When using multiple aircraft to suspend objects or operating equipment, it is sometimes difficult to maintain a high degree of consistency in the flight movements of each aircraft, and there may be uneven forces on the aircraft. Therefore, pulleys are used in the related art to suspend objects to balance the forces on both ends of the suspension rope. However, when using a pulley assembly to suspend the suspended object, the suspended object is prone to rotate around the axis in the direction of gravity, while driving the pulley assembly to rotate. In this case, the suspension rope will deviate from the tangential direction of the pulley, making the pulley resistance greater and the suspension rope prone to wear; in severe cases, it may even cause it to get stuck or fall off the pulley. When the pulley assembly suspends the operating assembly for operation, the rotation of the operating assembly makes its direction difficult to control, which is not conducive to the completion of the operation. Taking the fire extinguishing assembly suspended below the pulley assembly as an example, when the pulley assembly and the fire extinguishing assembly rotate, the fire extinguishing assembly is difficult to align with the fire scene, resulting in the fire extinguishing agent being difficult to accurately spray into the fire scene, affecting the fire extinguishing efficiency and effect.

[0031] To address the shortcomings of the aforementioned related art, the present invention provides a pulley assembly that includes an anti-torsion arm to resist torsion, thereby improving reliability and facilitating operation. Furthermore, the present invention also provides a suspension operation device and a flight suspension system.

[0032] Figure 1 This is a schematic diagram of the cooperation between the first suspension rope 210 and the pulley assembly 110 in one embodiment of the present application; Figure 2 FIG. 1 is a cross-sectional view of the first suspension rope 210 and the pulley assembly 110 in one embodiment of the present application. Figure 1 and Figure 2 As shown, the pulley assembly 110 provided in the embodiment of the present application includes a pulley seat 111, a roller 112, and an anti-torsion arm 113. The roller 112 is rotatably connected to the pulley seat 111, and the outer peripheral side of the roller 112 is used to cooperate with the first suspension rope 210. One end of the anti-torsion arm 113 is connected to the pulley seat 111, and the other end of the anti-torsion arm 113 is used to slide with the first suspension rope 210. The pulley seat 111 is provided with a connecting structure 1113 for connecting an external object. In the embodiment of the present application, when the suspended object causes the pulley assembly 110 to twist, the end of the anti-torsion arm 113 can abut against the taut first suspension rope 210. The reaction force applied by the taut first suspension rope 210 to the anti-torsion arm 113 resists the rotation of the anti-torsion arm 113, that is, resists the rotation of the pulley assembly 110 as a whole. Since the end of the anti-torsion arm 113 is in sliding cooperation with the first suspension rope 210 , it does not affect the tangential movement of the first suspension rope 210 along the roller 112 , and does not affect the realization of the pulley function.

[0033] It is understood that the torque applied to the first suspension rope 210 wound around the roller 112 is related to the displacement from the point of force application to the rotation axis and the magnitude of the force. For forces of the same magnitude, the greater the displacement, the greater the torque. In this application, the rotation axis is the vertical axis passing through the connecting structure 1113 of the pulley seat 111. Without the anti-torsion arm 113, the distance L1 from the point of force application from the pulley assembly 110 on the first suspension rope 210 wound around the roller 112 to the rotation axis is equal to the distance from the point of tangency between the first suspension rope 210 and the roller 112 to the rotation axis. When the anti-torsion arm 113 is installed, the first suspension rope 210 corresponding to the anti-torsion arm 113 is taut, and its connection to the roller 112 can be considered as a nearly rigid connection. At this point, the point where the force from the pulley assembly 110 acts on the first suspension rope 210 is located at the end of the anti-torsion arm 113 (specifically, the end away from the pulley seat 111). The distance L2 from this point of action to the rotation axis is equal to the distance from the point of contact between the first suspension rope 210 and the end of the anti-torsion arm 113 away from the pulley seat 111 to the rotation axis. Obviously, L2 is greater than L1. Therefore, after the anti-torsion arm 113 is used, the first suspension rope 210 can resist greater torque and is less susceptible to twisting due to external forces.

[0034] In this embodiment, the pulley assembly 110 includes at least two anti-torsion arms 113. The ends of the two anti-torsion arms 113, which are remote from the pulley seat 111, are respectively configured to slidably engage with the first suspension ropes 210 extending from both sides of the roller 112. In this embodiment, the two anti-torsion arms 113 are connected to the same side of the pulley seat 111, specifically, the same side in the axial direction of the roller 112. In other optional embodiments, the two anti-torsion arms 113 may be connected to opposite sides of the pulley seat 111. In other optional embodiments, the pulley assembly 110 may include only one anti-torsion arm 113, or may include three or more anti-torsion arms 113.

[0035] In this embodiment, a ring 1131 is provided at one end of the anti-torsion arm 113 away from the pulley seat 111, and the ring 1131 is used for the first suspension rope 210 to pass through, that is, the first suspension rope 210 passes through the ring 1131. Figure 1 and Figure 2 As shown, the collar 1131 does not affect the tangential movement of the first suspension rope 210 along the roller 112 , but when the pulley assembly 110 twists around the vertical axis, the collar 1131 abuts against the taut first suspension rope 210 , thereby limiting the twisting of the pulley assembly 110 .

[0036] Optionally, the anti-torque arm 113 is rotatably connected to the pulley seat 111, with the rotation axis of the anti-torque arm 113 parallel to the rotation axis of the roller 112. This arrangement allows the anti-torque arm 113 to rotate synchronously with the rotation of the first suspension rope 210 when the angle between the first suspension ropes 210 on either side of the roller 112 changes, thereby preventing excessive interference with the first suspension ropes 210. Optionally, a mounting post 116 is provided on the pulley seat 111. The mounting post 116 can be fitted with a first bearing. The end of the anti-torque arm 113 fits over the outer ring of the first bearing. The end of the mounting post 116 facing away from the pulley seat 111 can be threadedly engaged with a nut, thereby limiting the position of the first bearing and the end of the anti-torque arm 113. A gasket can be provided between the nut and the first bearing. Optionally, the mounting post 116 includes, but is not limited to, a semi-threaded screw, which passes through the pulley seat 111 and has its end threadedly engaged with the nut. The first bearing is mounted on the outer side of the smooth cylindrical surface of the semi-threaded screw. Optionally, the semi-threaded screw includes but is not limited to a countersunk screw, and the type of the first bearing includes but is not limited to a deep groove ball bearing, a needle bearing, and a roller bearing; in other embodiments, the first bearing may be omitted, and the end of the anti-torsion arm 113 may be directly mounted on the mounting column 116.

[0037] Optionally, the pulley seat 111 forms a pulley groove, in which at least a portion of the roller 112 is accommodated, and the pulley assembly 110 further includes a rotating shaft 114 extending through the pulley groove, with the roller 112 rotatably engaged with the rotating shaft 114. The provision of the pulley groove protects the roller 112, and the two ends of the rotating shaft 114 are connected to the two side walls of the pulley groove, thereby improving the reliability of the roller 112.

[0038] Furthermore, the pulley seat 111 includes two end plates 1111 and a bottom plate 1112. The two end plates 1111 are spaced apart in the axial direction of the roller 112. The rotating shaft 114 is connected to the two end plates 1111. The edge of the bottom plate 1112 is connected to the edges of the two end plates 1111. The bottom plate 1112 is curved in an arc shape around the rotation axis of the roller 112. The two end plates 1111 and the bottom plate 1112 together form a pulley groove. The bottom plate 1112 is curved and adapted to the shape of the roller 112. This can minimize the volume of the pulley seat 111 and improve the compactness of the pulley assembly 110.

[0039] Furthermore, in order to reduce the frictional resistance between the roller 112 and the rotating shaft 114 and improve the smoothness of the rotation of the roller 112, in this embodiment, the rotating shaft 114 is provided with a second bearing 1142, and the roller 112 is sleeved on the outside of the second bearing 1142. Optionally, the type of the second bearing 1142 includes but is not limited to a deep groove ball bearing. In this embodiment, the rotating shaft 114 is formed by a bolt, which passes through the two end plates 1111 and then engages with a locking nut 115. A sleeve 1141 is provided between the end plate 1111 near the locking nut 115 and the rotating shaft 114. The sleeve 1141 can fill the gap between the rotating shaft 114 and the through hole on the end plate 1111, thereby limiting the radial displacement of the rotating shaft 114. The sleeve 1141 can also abut the inner ring of the second bearing 1142, thereby axially limiting the second bearing 1142. A flange is provided at one end of the sleeve 1141 near the locking nut 115. This flange protrudes radially from the sleeve 1141 and can abut between the outer surface of the end plate 1111 and the locking nut 115, thereby preventing the outer surface of the end plate 1111 from being directly rubbed by the locking nut 115. Furthermore, the rotating shaft 114 has a stepped surface. When the flange of the sleeve 1141 abuts the outer surface of the end plate 1111, the stepped surface of the sleeve 1141 and the rotating shaft 114 clamp the second bearing 1142, positioning the second bearing 1142 in the middle of the pulley groove, thereby ensuring that the roller 112 is positioned in the middle of the pulley groove.

[0040] In this embodiment, a limiting groove 1121 for cooperating with the first suspension rope 210 is provided on the outer peripheral side of the roller 112. When the first suspension rope 210 cooperates with the roller 112, the first suspension rope 210 is embedded in the limiting groove 1121. The limiting groove 1121 can reduce the risk of the first suspension rope 210 falling off the roller 112, thereby improving the reliability of the pulley assembly 110.

[0041] Optionally, the connection structure 1113 includes a stud, a screw hole or a hook, but the present application is not limited thereto. The connection structure 1113 may also be a structure that can realize other connection methods, including but not limited to a snap-on, plug-in connection structure, etc.

[0042] exist Figure 1 and Figure 2 In the embodiment shown, the connecting structure 1113 is a stud, which can be connected to the connecting screw hole on the operating component through the stud, so that the operating component can be lifted and related operations can be performed. In other embodiments, the connecting structure 1113 can also be a screw hole, which can be matched with the stud on the operating component through the screw hole. In addition, the pulley assembly 110 can also be used to hang ordinary cargo instead of the operating component. Therefore, the connecting structure 1113 can be a hook. Using a hook as the connecting structure 1113 can facilitate the loading and unloading of cargo. Optionally, when the pulley assembly 110 is used to hang ordinary cargo, the hook can be equipped with a releaser to form an automatic unhooking device, and the automatic unhooking device can be used to realize automatic mounting and throwing of cargo.

[0043] Figure 3 This is a schematic diagram of a hanging operation device 100 in the first embodiment of the present application; Figure 4 This is a cross-sectional view of the hanging operation device 100 in the first embodiment of the present application. Figure 3 and Figure 4 As shown, the suspended working device 100 provided in an embodiment of the present application includes a working assembly and a pulley assembly 110 of the aforementioned embodiment. The working assembly is connected to the connecting structure 1113 of the pulley seat 111 of the pulley assembly 110. The pulley assembly 110 is configured to cooperate with the first suspension rope 210, allowing the working assembly to slide along the first suspension rope 210. The pulley assembly 110 is provided with an anti-torsion arm 113, which prevents the suspended working assembly from rotating along the vertical axis, thereby facilitating control of the working assembly's orientation. Furthermore, since the spraying element 122 extends forward, it has a tendency to rotate downward under its own weight, creating a risk of "ducking." Furthermore, since the working assembly generates recoil during spraying, this can cause the spraying element 122 of the suspended working device 100 to "duck." However, thanks to the longer moment arm provided by the anti-torsion arm 113, this effectively prevents the spraying element 122 from ducking, maintaining a stable spraying direction.

[0044] In this embodiment, the operating component is a fire extinguishing component 120, which is used to spray fire extinguishing agents, including but not limited to water, dry powder fire extinguishing agents, and foam fire extinguishing agents. Aircraft 400 is connected to pulley assembly 110 via a first sling 210. Fire extinguishing component 120 and fire hose 300 can be hoisted to a location near the fire scene in a high-rise building via pulley assembly 110, and then fire extinguishing agents can be sprayed into the fire scene to extinguish the fire. In this application, the fire extinguishing agent transported by fire hose 300 includes but is not limited to water. The material of fire hose 300 can be adjusted appropriately based on the fire extinguishing agent being transported. Fire hose 300 can also be replaced with other delivery pipes that have the function of transporting fire extinguishing agents and are suitable for hanging.

[0045] In other optional embodiments, the operation component may also be a component for realizing other functions, such as a component for realizing functions such as pest control and irrigation.

[0046] Figure 5 Schematic diagram of the adapter 121 in one embodiment of the present application. Figures 3 to 5 In this embodiment, the fire extinguishing assembly 120 includes an adapter 121 and an injection member 122. The adapter 121 has a cavity, an outlet 1212, and an inlet 1211 communicating with the cavity. The injection member 122 is detachably connected to the outlet 1212, and the inlet 1211 is used to connect to the fire hose 300. The fire hose 300 can supply the fire extinguishing agent from the fire extinguishing agent supply device into the cavity of the adapter 121 through the inlet 1211 of the adapter 121. The fire extinguishing agent enters the injection member 122 through the outlet 1212 and is sprayed by the injection member 122 into the fire scene, thereby achieving the purpose of extinguishing the fire. The injection member 122 is detachably connected to the outlet 1212, making it easy to install and remove, and the type of injection member 122 can be changed as needed.

[0047] In this embodiment, the central axis of the inlet 1211 of the adapter 121 extends along a predetermined direction, and the pulley assembly 110 is directly connected to an end of the adapter 121 away from the inlet 1211 in the predetermined direction. Figure 3 and Figure 4In the embodiment, the preset direction is the up-down direction. In actual use, the preset direction is the vertical direction. In this embodiment, the pulley assembly 110 is directly connected to the adapter 121. Specifically, the connection structure 1113 of the pulley seat 111 of the pulley assembly 110 is directly connected to the adapter 121. The end of the adapter 121 connected to the pulley assembly 110 (specifically, the pulley seat 111 of the pulley assembly 110) is provided with a connecting screw hole. The connecting screw hole is threadedly connected to the connecting structure 1113 (a stud in this embodiment) on the pulley seat 111 of the pulley assembly 110. Optionally, the centerline of the connecting screw hole on the adapter 121 that connects to the connecting structure 1113 on the pulley seat 111 of the pulley assembly 110 is coaxial with the center axis of the inlet 1211 of the adapter 121. Since the inlet 1211 and the connecting screw hole of the adapter 121 are the two points of force for the tension exerted on the adapter 121, when the fire extinguishing assembly 120 is lifted, the inlet 1211 of the adapter 121 and the connecting screw hole will be facing each other in the vertical direction. By making the center line of the connecting screw hole coaxial with the center axis of the inlet 1211 of the adapter 121, the center axes of the inlet 1211, the connecting screw hole and the stud of the pulley seat 111 can all extend in the vertical direction, consistent with the direction of the tensile load. The stud is only subjected to tension in the axial direction of itself and will not be subjected to radial force, thereby ensuring the reliability of the stud.

[0048] In an optional embodiment, a boss is provided at one end of the adapter 121 connected to the pulley assembly 110, and a connecting screw hole matching the connecting structure 1113 (stud) is provided on the boss, and the cross-sectional shape of the boss includes but is not limited to a circle, an ellipse or a polygon.

[0049] In this embodiment, the central axis of the inlet 1211 of the adapter 121, the central axis of the outlet 1212, and the rotation axis of the roller 112 are coplanar, so that the overall symmetry of the hanging operation device 100 is better. When the fire extinguishing component 120 sprays the fire extinguishing agent, the recoil force generated by the injection component 122 can act on the central axis of the inlet 1211, and no torque around the central axis of the inlet 1211 is generated, which is beneficial to prevent the fire extinguishing component 120 from twisting and makes the injection direction of the injection component 122 easy to control. Furthermore, the central axis of the inlet 1211, the central axis of the outlet 1212 and the rotation axis of the roller 112 are coplanar, and the central axis of the inlet 1211 is perpendicular to the rotation axis of the roller 112 of the pulley assembly 110. In this case, the plane where the central axis of the inlet 1211 and the central axis of the outlet 1212 are located is perpendicular to the plane where the roller 112 is located, and the roller 112 is coplanar with the first suspension rope 210. Therefore, the plane where the central axis of the inlet 1211 and the central axis of the outlet 1212 are located is perpendicular to the plane where the roller 112 and the first suspension rope 210 are located, so that the recoil force can act on the central axis of the inlet 1211 and can be evenly distributed to the first suspension rope 210 on both sides of the pulley assembly 110, which can effectively prevent the fire extinguishing assembly 120 from twisting, facilitate the control of the spraying direction of the spray member 122, and at the same time make the force on multiple aircraft 400 more uniform, thereby improving the stability of the system.

[0050] Because the adapter 121 is provided with a connecting screw hole for direct or indirect connection with the pulley assembly 110, and the pulley seat 111 and the adapter 121 are threaded together, there is an issue of uncertain rotation angle after tightening. Moreover, relative rotation may occur during use, resulting in the plane where the central axis of the inlet 1211 and the central axis of the outlet 1212 are not perpendicular to the plane where the roller 112 is located, and the orientation of the injection member 122 is difficult to control. To this end, in this embodiment, the adapter 121 is also provided with a locking screw hole 1213, which extends from the outer surface of the adapter 121 to the connecting screw hole. The fire extinguishing assembly 120 also includes a locking screw 1214, which cooperates with the locking screw hole 1213 and abuts against a stud that cooperates with the connecting screw hole (such as the connecting structure 1113 on the pulley seat 111). Optionally, a locking screw hole 1213 is provided on the side wall of the boss of the adapter 121 and extends from the side wall of the boss to a connecting screw hole for engaging with the connecting structure 1113 (stud) of the pulley seat 111. Locking screw 1214 engages with locking screw hole 1213, allowing locking screw 1214 to abut the stud (i.e., the connecting structure 1113) in the connecting screw hole and limit the stud to prevent it from rotating relative to the connecting screw hole, thereby controlling the orientation of the injection member 122 relative to the pulley assembly 110 and achieving the purpose of controlling the injection direction of the injection member 122.

[0051] Furthermore, the angle A between the orientation of outlet 1212 and the orientation of inlet 1211 is greater than 90°. It will be appreciated that after the ejection member 122 is installed in the outlet 1212, the central axis of the ejection member 122 coincides with the central axis of the outlet 1212, and the orientation of the ejection member 122 is consistent with the orientation of the outlet 1212. By setting the angle A greater than 90°, the ejection member 122 is tilted upward during use, achieving an elevation-angled spray. Because the ejected fire extinguishing agent (such as water) follows a parabolic trajectory, an elevation angle helps the extinguishing agent be sprayed farther, covering a greater horizontal distance and facilitating fire extinguishing at higher locations. Optionally, the angle A between the orientation of outlet 1212 and the orientation of inlet 1211 is between 95° and 150°; further, the angle A between the orientation of outlet 1212 and the orientation of inlet 1211 is between 105° and 135°. If angle A is too large, the elevation angle of ejection element 122 will be too large, resulting in dispersed water flow, weakened impact force, increased recoil force, and reduced fire extinguishing efficiency. If angle A is too small, the elevation angle of ejection element 122 will be too small, resulting in a narrow coverage area, making it difficult to reach high or distant targets and unable to cover large fire areas. In this application, the size of angle A can be adjusted appropriately based on actual needs. Optionally, ejection element 122 can be a rotating body, with the central axis of ejection element 122 being the axis of the rotating body.

[0052] In other optional embodiments, depending on the requirements of the application scenario, the angle A between the orientation of the outlet 1212 and the orientation of the inlet 1211 can also be 90° (i.e., the orientation of the outlet 1212 is perpendicular to the orientation of the inlet 1211), or even an acute angle (the orientation of the injection member 122 is tilted downward in the working state).

[0053] Optionally, the injection member 122 is a spray gun or a fire cannon head. In this embodiment, the injection member 122 is a spray gun, which has a gradually shrinking inner cavity, which is conducive to converging the fire extinguishing agent and ejecting it at a higher speed and a longer range.

[0054] In this embodiment, the adapter 121 is provided with a first connector 123 at the outlet 1212, through which the outlet 1212 is connected to the injection member 122; and a second connector 124 is provided at the inlet 1211, through which the inlet 1211 can be connected to the fire hose 300. The provision of the first connector 123 and the second connector 124 allows the adapter 121 to be compatible with the connectors provided with the injection member 122 and the fire hose 300, enabling quick assembly and disassembly.

[0055] Optionally, the first joint 123 is welded or screwed to the adapter 121, and the first joint 123 is snap-fitted, plug-fitted or screwed to the injection member 122; the second joint 124 is welded or screwed to the adapter 121, and the second joint 124 can be snap-fitted or plug-fitted to the fire hose 300 (specifically the quick connector on the fire hose 300).

[0056] Figure 6 This is a schematic diagram of the first connector 123 in the first embodiment of the present application; Figure 7 FIG. 1 is a schematic diagram of the injection member 122 in the first embodiment of the present application. Figure 6 and Figure 7 As shown, in this embodiment, the first joint 123 is a card-type joint, and an external thread is provided on the first joint 123, and the external thread cooperates with the internal thread at the outlet 1212; the first joint 123 is card-connected with the injection member 122.

[0057] Specifically, the first connector 123 is provided with a first locking groove 1231, which extends around the central axis of the first connector 123. A first flange 1232 is provided at the opening of the first locking groove 1231. The first flange 1232 is disposed on the outer sidewall of the first locking groove 1231 and protrudes inward. The first connector 123 is also provided with a first snap-fit ​​portion 1233, which forms a first snap-fit ​​portion 1234 with an opening facing radially outward. In this embodiment, there are two first locking grooves 1231, two first flanges 1232, and two first snap-fit ​​portions 1233. Optionally, the two first locking grooves 1231, the two first flanges 1232, and the two first snap-fit ​​portions 1233 are all rotationally symmetrically arranged along the central axis of the first connector 123. Correspondingly, the injection member 122 is provided with a second locking groove 1221, which extends around the central axis of the injection member 122. A second flange 1222 is provided at the opening of the second locking groove 1221, which is disposed on the outer sidewall of the second locking groove 1221 and protrudes inward. The second connector 124 is also provided with a second snap-fit ​​portion 1223, which forms a radially outward second snap-fit ​​portion 1224. In this embodiment, there are two second locking grooves 1221, two second flanges 1222, and two second snap-fit ​​portions 1223; optionally, the two second locking grooves 1221, the two second flanges 1222, and the two second snap-fit ​​portions 1223 are all rotationally symmetrically arranged along the central axis of the injection member 122.

[0058] When the first connector 123 is mated with the injection member 122, the first latch portion 1233 and the second latch portion 1223 are first inserted into the second locking groove 1221 and the first locking groove 1231, respectively. Then, the injection member 122 is rotated 90 degrees around its own axis. At this time, the first flange 1232 can be inserted into the second latch portion 1224 of the second latch portion 1223, and the second flange 1222 can be inserted into the first latch portion 1234 of the first latch portion 1233. This prevents the injection member 122 and the first connector 123 from being axially separated.

[0059] Similarly, when the second joint 124 is a card-type joint, the specific structure of the second joint 124 can refer to the first joint 123, and the connection method between the second joint 124 and the fire hose 300 can refer to the connection method between the first joint 123 and the injection member 122, which will not be repeated here.

[0060] Figure 8 This is a schematic diagram of a hanging operation device 100 in the second embodiment of the present application; Figure 9 This is a cross-sectional view of the hanging operation device 100 in the second embodiment of the present application. Figure 8 and Figure 9 As shown, compared with Figure 3 、 Figure 4 In the illustrated embodiment, the operating components of the hanging working device 100 in the second embodiment of the present application further include a tension meter 125, with its two ends connected to the pulley assembly 110 and the adapter 121, respectively. The tension meter 125 is used to detect the tensile load borne by the pulley assembly 110. The tension meter 125 can monitor the load on the pulley assembly 110 in real time, allowing for timely adjustment of the operating status of the hanging working device 100. For example, taking the fire extinguishing assembly 120 as the operating component, and the fire extinguishing assembly 120 connected to the fire hose 300 as an example, the higher the hanging height, the longer the suspended fire hose 300, the greater the tensile load between the fire extinguishing assembly 120 and the pulley assembly 110, and the greater the load on the aircraft 400. Furthermore, the greater the flow rate sprayed by the fire extinguishing assembly 120, the greater the recoil, which also increases the load on the aircraft 400. By real-time monitoring of the tensile load on the pulley assembly 110 and timely adjusting the flight altitude and jet flow rate of the aircraft 400 based on the tensile load, it is possible to avoid overloading the aircraft 400 due to excessive suspension altitude or excessive jet flow, thereby improving the safety of the suspension operation device 100 and the flight suspension system. The tension detector 125 can communicate with the aircraft 400 and / or a ground control center via wireless communication.

[0061] In this embodiment, when the operating component is a fire extinguishing component 120, the pulley assembly 110 is indirectly connected to the adapter 121 of the fire extinguishing component 120 via a tension gauge 125. The pulley assembly 110 is indirectly connected to one end of the adapter 121 in a predetermined direction away from the inlet 1211. Specifically, the connection structure 1113 of the pulley seat 111 of the pulley assembly 110 is indirectly connected to the adapter 121. Specifically, the tension gauge 125 has two connecting portions at each end, and the two connecting portions are respectively connected to the adapter 121 and the connection structure 1113 of the pulley seat 111. Specifically, in this embodiment, both connecting portions are studs, the connection structure 1113 on the pulley seat 111 is a screw hole, and the adapter 121 is also provided with a connecting screw hole connected to the connecting portion. Optionally, the centerline of the connecting screw hole on the adapter 121 that connects to the connection portion of the tension gauge 125 is coaxial with the central axis of the inlet 1211 of the adapter 121. Since the inlet 1211 and the connecting screw hole of the adapter 121 are the two points of force for the tension exerted on the adapter 121, when the fire extinguishing assembly 120 is lifted, the inlet 1211 of the adapter 121 and the connecting screw hole will be facing each other in the vertical direction. By making the center line of the connecting screw hole coaxial with the center axis of the inlet 1211 of the adapter 121, the center axes of the inlet 1211, the connecting screw hole and the connecting part of the tension detector 125 can all extend in the vertical direction, consistent with the direction of the tension load. The connecting part of the tension detector 125 is only subjected to tension in the axial direction of the inlet, and will not be subjected to radial force, thereby ensuring the reliability of the connecting part of the tension detector 125.

[0062] In an optional embodiment, the structure of the adapter 121 may be similar to that of the first embodiment, and a boss is provided at one end of the adapter 121 connected to the tension detector 125, and a connecting screw hole on the adapter 121 connected to the connecting part (stud) of the tension detector 125 is provided on the boss, and the cross-sectional shape of the boss includes but is not limited to a circle, an ellipse or a polygon.

[0063] In order to ensure that the injection member 122 of the fire extinguishing assembly 120 has a certain direction, in an optional embodiment of the present application, a locking screw hole 1213 is provided on the pulley seat 111. Specifically, the locking screw hole 1213 is provided on the end plate 1111 of the pulley seat 111, and passes through the end plate 1111 of the pulley seat 111 to the screw hole used for connecting with the connecting part (stud) of the tension detector 125. In other optional embodiments of the present application, both the adapter 121 and the pulley seat 111 are provided with locking screw holes 1213. Specifically, the locking screw holes 1213 are provided on the pulley seat 111 in a manner similar to the aforementioned embodiment. The locking screw holes 1213 are provided on the adapter 121 in such a manner that the locking screw holes 1213 are provided on the side walls of the adapter 121 (which may be the side walls of the boss of the adapter 121), and pass through the side walls of the adapter 121 (which may be the side walls of the boss of the adapter 121) to the connecting screw holes for connecting to the connecting portion (stud) of the tension detector 125. The locking screw holes 1213 at these two locations can respectively limit the relative rotation of the threaded connection by means of locking screws 1214 (see Figure 9 During assembly, the pulley seat 111 and the tension gauge 125 can be screwed together first, and then the tension gauge 125 and the adapter 121 can be screwed together until the central axis of the ejection member 122 and the rotation axis of the roller 112 are coplanar, and then the locking screw 1214 can be screwed into the locking screw hole 1213 on the pulley seat 111 and the locking screw hole 1213 on the adapter 121 respectively to limit the relative rotation of the threaded connection. Alternatively, the adapter 121 and the tension gauge 125 can be screwed together first, and then the tension gauge 125 and the pulley seat 111 can be screwed together until the central axis of the ejection member 122 and the rotation axis of the roller 112 are coplanar, and then the locking screw 1214 can be screwed into the locking screw hole 1213 on the pulley seat 111 and the locking screw hole 1213 on the adapter 121 respectively to limit the relative rotation of the threaded connection.

[0064] In other optional embodiments of the present application, two locking screw holes 1213 are provided on the adapter 121 and / or two locking screw holes 1213 are provided on the pulley seat 111 (optionally, the two locking screw holes 1213 are respectively provided on the two end plates 1111 of the pulley seat 111), but the present application is not limited to this. The number of locking screw holes 1213 provided on the adapter 121 and the pulley seat 111 can be adjusted according to actual needs.

[0065] In an optional embodiment, the injection member 122 is a fire monitor head; compared with a spray gun, a fire monitor head has a larger flow rate and is more effective in extinguishing high-rise fires.

[0066] In this embodiment, both ends of the first connector 123 are provided with external threads, respectively, so as to cooperate with the internal threads of the injection part 122 and the adapter 121, respectively. Optionally, the second connector 124 is a quick-connect connector, one end of the second connector 124 is provided with external threads, so as to cooperate with the internal threads of the inlet 1211, and the other end is plugged into and cooperated with the quick connector on the fire hose 300. When the quick-connect connector is inserted into the quick connector of the fire hose 300, the two are locked and can prevent axial falling off. The quick-connect connector can be a fire-fighting standard part, and its specific structure and principle can refer to the existing technology and will not be repeated here. It can be understood that the types of the first connector 123 and the second connector 124 can be adjusted as needed, including but not limited to card connectors and quick-connect connectors.

[0067] Figure 10 This is a schematic diagram of a flight suspension system arranged in a straight line in one embodiment of the present application; Figure 11 This is a schematic diagram of a quadrilateral arrangement of the flight suspension system in one embodiment of the present application. Figure 10 and Figure 11 As shown, an embodiment of the present application also provides a flying suspension system, which includes the aforementioned suspension working device 100, a first suspension rope 210, and at least two aircraft 400. The first suspension rope 210 engages with the roller 112 of the pulley assembly 110, and the two ends of the first suspension rope 210 are directly or indirectly connected to different aircraft 400. In this embodiment, the flying suspension system is a fire extinguishing system, and the operating component of the suspension working device 100 is a fire extinguishing assembly 120. Furthermore, the flying suspension system also includes a fire hose 300 and a fire extinguishing agent supply device (not shown). One end of the fire hose 300 is connected to the inlet 1211 on the adapter 121 of the fire extinguishing assembly 120, and the other end of the fire hose 300 is connected to the fire extinguishing agent supply device. The fire extinguishing agent supply device can transport the fire extinguishing agent through the fire hose 300 to the adapter 121, and then spray the fire extinguishing agent toward the fire scene through the spraying component 122. Specifically, the aircraft 400 includes but is not limited to drones, and the fire extinguishing agent supply device includes but is not limited to fire trucks.

[0068] In this embodiment, the flying suspension system includes four aircraft 400 and two second suspension ropes 220. The ends of the first suspension rope 210 are connected between the ends of the two second suspension ropes 220, and the ends of the second suspension ropes 220 are each connected to a different aircraft 400. By using more aircraft 400 to construct the flying suspension system, the load capacity of the flying suspension system can be increased, allowing for the suspension of heavier suspension work devices 100. When the suspension work devices 100 are connected to the fire hose 300, the suspension work devices 100 and the fire hose 300 can be hung higher, better meeting the needs of high-rise firefighting. It should be understood that the flying suspension system can also include more aircraft 400 and, correspondingly, more suspension ropes. For example, each end of the second suspension rope 220 can be connected to a third suspension rope, indirectly connecting more aircraft 400 via the third suspension rope.

[0069] Taking the flying suspension system including four aircraft 400 as an example, optionally, when the aircraft 400 is in flight, the first suspension rope 210 and the second suspension rope 220 are coplanar, that is, the aircraft 400 are arranged in a straight line, such as Figure 10 In this case, the fire extinguishing assembly 120 can be placed as close to the fire scene as possible without interference from buildings, so as to achieve better fire extinguishing effect. In other embodiments, the layout of the aircraft 400 can also be adjusted as needed, such as by Figure 11 The quadrilateral arrangement shown.

[0070] In this embodiment, a sliding device 500 can be used to connect the first and second slings 210 and 220. The sliding device 500 can be a slip ring that slides along the second sling 220, or a movable pulley that slides with the second sling 220. The movable pulley can be the pulley assembly 110 provided in the previous embodiment of this application, but this application is not limited thereto. The movable pulley can also adopt other structures with similar functions. By allowing the end of the first sling 210 to slide along the second sling 220, if one of the aircraft 400 exhibits uncoordinated flight maneuvers, the sliding device 500 can slide along the second sling 220, allowing the aircraft 400 at both ends of the second sling 220 to spontaneously balance the forces, preventing one aircraft 400 from being overloaded. Therefore, in the flight suspension system of this embodiment of the application, each aircraft 400 can easily maintain stable flight, and coordinated control is less difficult.

[0071] In other optional embodiments, the flying suspension system can be used for cargo transportation. Specifically, the flying suspension system includes the pulley assembly 110 of the above embodiment, and is connected to a suspended object via the pulley seat 111 of the pulley assembly 110. In other words, in this embodiment, the pulley assembly 110 can be connected to the suspended object instead of the operating assembly, thereby achieving the suspension and transportation of cargo.

[0072] The pulley assembly 110, the hanging operation device 100, and the flight hanging system provided in this application include but are not limited to the above-mentioned embodiments. The hanging operation device 100 and the flight hanging system may omit some features, add some features, or combine the features of the first and second embodiments based on the first and second embodiments. For example, the anti-torsion arm 113 may be omitted based on the first and second embodiments, or the tension detector 125 may be omitted based on the second embodiment, or the tension detector 125 may be added based on the first embodiment, or the spray gun in the first embodiment may be replaced with the fire monitor head in the second embodiment, or the fire monitor head in the second embodiment may be replaced with the spray gun in the first embodiment. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of this application.

[0073] In summary, the embodiments of the present application provide a pulley assembly 110, a suspension operation device 100, and a flight suspension system. The pulley assembly 110 includes a pulley seat 111, a roller 112, and an anti-torsion arm 113. The roller 112 is rotatably connected to the pulley seat 111. The outer periphery of the roller 112 is configured to engage with the first suspension rope 210. One end of the anti-torsion arm 113 is connected to the pulley seat 111, and the other end of the anti-torsion arm 113 is configured to slidably engage with the first suspension rope 210. The pulley seat 111 is provided with a connection structure 1113 for connecting to an external object. During use, when the pulley assembly 110 and the suspended object generate a tendency to twist, the anti-torsion arm 113, due to its connection to the pulley seat 111, also tends to rotate. Because one end of the anti-torsion arm 113 is connected to the first suspension rope 210, when the pulley assembly 110 and the suspended object are torsionally coupled, the upper end of the anti-torsion arm 113 abuts against the taut first suspension rope 210. The reaction force exerted by the taut first suspension rope 210 on the anti-torsion arm 113 resists the rotation of the anti-torsion arm 113, and thus resists the rotation of the pulley assembly 110 as a whole. Because the end of the anti-torsion arm 113 is in sliding engagement with the first suspension rope 210, it does not affect the tangential movement of the first suspension rope 210 along the roller 112, thereby maintaining the pulley's function. The pulley assembly 110 provided herein is less susceptible to torsion when suspending a suspended object or operating device. Therefore, the first suspension rope 210 is kept tangential to the roller 112 of the pulley assembly 110, allowing the roller 112 to rotate smoothly at all times. The first suspension rope 210 is less likely to wear or become stuck, thereby improving the reliability of the pulley assembly 110. Moreover, when the working component is hung, the working component can be prevented from rotating randomly, thereby ensuring that the orientation of the working component is controllable, which is conducive to the realization of the work.

[0074] The hanging operation device 100 provided in the present application includes an operation component and the above-mentioned pulley assembly 110, and therefore has the advantages of good reliability and easy operation control.

[0075] The flight suspension system provided herein includes the aforementioned pulley assembly 110, connected to a suspended object via the pulley seat 111 of the pulley assembly 110; or, alternatively, includes the aforementioned suspension operation device 100. The flight suspension system also includes a first suspension rope 210 and at least two aircraft 400. The first suspension rope 210 engages with the roller 112 of the pulley assembly 110, and the ends of the first suspension rope 210 are directly or indirectly connected to different aircraft 400. This flight suspension system has high reliability, is easy to coordinate and control, and is convenient to operate.

[0076] The above is only a specific implementation method of the present application, but the scope of protection of the present application is not limited thereto. Any changes or replacements that can be easily thought of by any technician familiar with this technical field within the technical scope disclosed in this application should be covered by the scope of protection of the present application.

Claims

1. A pulley assembly, characterized in that: It includes a pulley seat, a roller and an anti-torsion arm, the roller is rotatably connected to the pulley seat, the outer peripheral side of the roller is used to cooperate with the first suspension rope, one end of the anti-torsion arm is connected to the pulley seat, and the other end of the anti-torsion arm is used to slide with the first suspension rope, and the pulley seat is provided with a connection structure for connecting an external object.

2. The pulley assembly according to claim 1, wherein: The pulley assembly comprises at least two anti-torsion arms, and one end of the two anti-torsion arms away from the pulley seat is respectively used for slidingly cooperating with the first suspension ropes extending from both sides of the roller; A collar is provided at one end of the anti-torsion arm away from the pulley seat, and the collar is used for allowing the first suspension rope to pass through.

3. The pulley assembly according to claim 1, wherein: The anti-torsion arm is rotatably connected to the pulley seat, and the rotation axis of the anti-torsion arm is parallel to the rotation axis of the roller.

4. The pulley assembly according to any one of claims 1 to 3, characterized in that: The pulley seat forms a pulley groove, and at least a portion of the roller is accommodated in the pulley groove. The pulley assembly further includes a rotating shaft passing through the pulley groove, and the roller is rotatably engaged with the rotating shaft. The pulley seat includes two end plates and a base plate, the two end plates are spaced apart in the axial direction of the roller, the rotating shaft is connected to the two end plates, the edge of the base plate is connected to the edges of the two end plates, and the base plate is curved in an arc shape around the rotation axis of the roller.

5. The pulley assembly according to any one of claims 1 to 3, characterized in that: A limiting groove for cooperating with the first suspension rope is provided on the outer peripheral side of the roller.

6. The pulley assembly according to any one of claims 1 to 3, characterized in that: The connection structure includes a stud, a screw hole or a hook.

7. A hanging operation device, characterized in that: The invention comprises a working component and the pulley assembly according to any one of claims 1 to 6, wherein the working component is connected to the connecting structure of the pulley seat of the pulley assembly.

8. The hanging working device according to claim 7, characterized in that: The operating component is a fire extinguishing component, and the fire extinguishing component is used to spray a fire extinguishing agent; The working component includes a tension detector, and the working component is connected to the pulley seat of the pulley assembly through the tension detector. The tension detector is used to detect the tension load borne by the pulley assembly.

9. A flying suspension system, characterized in that: A pulley assembly comprising any one of claims 1 to 6, wherein a hanging object is connected via a pulley seat of the pulley assembly; or a hanging operation device comprising any one of claims 7 to 8; The flight suspension system further includes a first suspension rope and at least two aircraft. The first suspension rope cooperates with the roller of the pulley assembly. Both ends of the first suspension rope are directly or indirectly connected to different aircraft.

10. The flight suspension system according to claim 9, characterized in that: The flight suspension system includes at least four of the aircraft, and further includes two second suspension ropes, wherein both ends of the first suspension rope are respectively connected between both ends of two second suspension ropes, and both ends of the second suspension ropes are respectively directly or indirectly connected to different aircraft; When the aircraft is in flight, the first suspension rope and the second suspension rope are coplanar.

Images