Long arm retraction device and long arm boat

Abstract

The application discloses a long-arm collecting and releasing device and a long-arm ship. The long-arm collecting and releasing device comprises an intercepting belt and a reel driving mechanism. The reel driving mechanism comprises a driving member, a rotating shaft rotatably installed on a main ship, and a reel frame provided on the rotating shaft and surrounding the intercepting belt. The driving member is in driving connection with the rotating shaft and is used for driving the rotating shaft to drive the reel frame to rotate to collect and release the intercepting belt. The relative height of the reel frame and the rotating shaft is variable. When the water depth of the main ship changes due to the collection and loading of garbage, the water surface height of the reel frame and the intercepting belt on the reel frame can be maintained by changing the relative height of the reel frame and the rotating shaft, so that the height of the intercepting belt at the end of the main ship does not change along with the main ship, the intercepting effect of the floating garbage is ensured, and the garbage leakage phenomenon is avoided.

Description

Technical Field

[0001] This invention belongs to the field of water surface garbage cleaning technology, specifically relating to a long-arm launching and launching device and a long-arm boat. Background Technology

[0002] With economic and social development, people have higher and higher requirements for their living environment. There is a large market demand for equipment to handle floating garbage in urban waterways. The application of long-arm boats has perfectly solved the problem of collecting floating garbage in urban waterways and greatly improved operational efficiency.

[0003] The existing long-arm vessel solution mainly consists of a tractor, a barrier strip, and a main vessel, with the two ends of the barrier strip fixed to the tractor and the main vessel, respectively. However, because the draft of the main vessel changes when collecting and loading garbage, the underwater and above-water interception heights of the barrier strip at the main vessel end change, affecting the interception effect of floating garbage and causing garbage to leak out. Summary of the Invention

[0004] In view of the above-mentioned defects or deficiencies, the present invention provides a long-arm deployment and retraction device and a long-arm vessel, which aims to solve the technical problem that the interception strip will leak garbage due to changes in the draft of the main vessel.

[0005] To achieve the above objectives, the present invention provides a long arm deployment and retraction device, wherein the long arm deployment and retraction device includes an intercepting belt and a reel drive mechanism; the reel drive mechanism includes a rotary drive component, a rotating shaft rotatably mounted on the main ship, and a reel frame disposed on the rotating shaft and wound with the intercepting belt, the rotary drive component being driven to the rotating shaft to rotate the reel frame to deploy and retract the intercepting belt, and the relative height between the reel frame and the rotating shaft being variable.

[0006] In this embodiment of the invention, the reel frame is circumferentially positioned and can be lifted and lowered on the rotating shaft. The reel frame is provided with a float, which is used to apply an upward buoyancy to the reel frame so that the water level of the reel frame remains unchanged when the rotating shaft moves up and down with the main ship.

[0007] In an embodiment of the invention, one of the rotating shaft and the reel holder is formed with a key body extending along the height direction, and the other is formed with a keyway that is key-connected to the key body.

[0008] In this embodiment of the invention, the key body is disposed on the rotating shaft, the keyway is formed on the inner ring of the reel holder, and the height of the keyway is greater than the height of the key body.

[0009] In this embodiment of the invention, the reel frame includes an inner sleeve, an outer drum, and a connecting rod assembly. The inner sleeve is located inside the outer drum and is connected to the outer drum via the connecting rod assembly. The inner sleeve is fitted onto the rotating shaft and forms a keyway. The outer drum is used to wind the intercepting tape.

[0010] In this embodiment of the invention, the number of floats is at least two, and the at least two floats are evenly spaced circumferentially on the inner side of the outer drum.

[0011] In this embodiment of the invention, the float is mounted on the reel frame with adjustable height.

[0012] To achieve the above objectives, the present invention also provides a long-arm vessel, wherein the long-arm vessel includes a main vessel, a tractor vessel, and a long-arm deployment and retraction device as described above. There are two tractor vessels and two long-arm deployment and retraction devices. The two long-arm deployment and retraction devices are spaced apart on the main vessel, and the two tractor vessels are respectively connected to the interception belts of the two long-arm deployment and retraction devices in a one-to-one correspondence.

[0013] In this embodiment of the invention, the main vessel includes a hull with a garbage gravity flow channel and a garbage storage compartment on the hull. The hull has installation spaces on both sides of the garbage gravity flow channel for the corresponding installation of two long-arm extension and retraction devices.

[0014] In this embodiment of the invention, the long-arm vessel also includes a docking structure disposed on the main vessel. The docking structure is used to lock or unlock the traction vessel. The docking structure includes a docking drive and a docking member. The docking drive is disposed on the main vessel. The docking member and the docking drive are driven to be connected and used to lock or unlock the traction vessel. The docking drive is used to drive the docking member to move closer to or away from the traction vessel.

[0015] Through the above technical solutions, the long arm extension and retraction device provided in the embodiments of the present invention has the following beneficial effects:

[0016] When using the aforementioned long-arm deployment and retrieval device, which includes an intercepting belt and a reel drive mechanism, the reel drive mechanism's rotating shaft is rotatably mounted on the main vessel. The reel, around which the intercepting belt is wound, is mounted on the rotating shaft. When the rotating shaft is driven by the rotating drive component, the reel frame rotates accordingly, enabling the deployment and retrieval of the intercepting belt. Furthermore, the relative height between the reel frame and the rotating shaft is variable. This allows for adjustments to the main vessel's draft as it collects and loads garbage, maintaining the water level of the reel frame and the intercepting belt. This prevents the intercepting belt height at the main vessel end from changing with the main vessel, ensuring effective interception of floating garbage and preventing leakage. In addition, the intercepting belt can be automatically deployed and retrievaled via the reel drive mechanism, with stepless length adjustment to adapt to different water conditions.

[0017] Other features and advantages of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0018] The accompanying drawings are provided to illustrate the invention and form part of the specification. They are used together with the following detailed description to explain the invention, but do not constitute a limitation thereof. In the drawings:

[0019] Figure 1 This is a schematic diagram of the structure of the long arm deployment and retraction device in the deployment of the interception strip on a long arm vessel according to an embodiment of the present invention;

[0020] Figure 2 This is a cross-sectional structural schematic diagram of a longarm vessel according to an embodiment of the present invention;

[0021] Figure 3 This is a structural schematic diagram of a long-arm vessel according to an embodiment of the present invention;

[0022] Figure 4 This is a cross-sectional structural schematic diagram of a long arm retraction device according to an embodiment of the present invention;

[0023] Figure 5 This is a schematic diagram of the structure of the reel holder mounted on the rotating shaft according to an embodiment of the present invention;

[0024] Figure 6 This is a schematic diagram of a rotating shaft installed on the main ship according to an embodiment of the present invention;

[0025] Figure 7 This is a schematic diagram of the docking structure between the tractor and the main ship according to an embodiment of the present invention;

[0026] Figure 8 This is a schematic diagram of the structure by which a tractor is locked to a docking structure according to an embodiment of the present invention.

[0027] Explanation of reference numerals in the attached figures

[0028] 100 Main ship101 Hull

[0029] 102 Waste storage compartment; 103 Waste gravity flow channel

[0030] 104 self-lubricating bearing stainless steel sleeve; 105 cover plate

[0031] 106 Bearing housing; 107 Self-lubricating bearing

[0032] 108 Installation space 200 Long arm extension and retraction device

[0033] 210 Interception belt 220 Reel drive mechanism

[0034] 221 Rotary drive component 222 Rotary shaft

[0035] 223 Reel holder 224 Key body

[0036] 225 Inner ring sleeve 226 Connecting rod assembly

[0037] 227 Outer reel 230 Float

[0038] 300 tractor boat, 400 docking structure

[0039] 410 Docking drive component; 420 Tilting frame

[0040] 421 Installation Section 422 Connection Section Detailed Implementation

[0041] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0042] The long arm deployment and take-up device and long arm boat of the present invention are described below with reference to the accompanying drawings.

[0043] like Figures 1 to 3 As shown, the present invention provides a long arm retraction device, wherein the long arm retraction device 200 includes:

[0044] Interceptor 210;

[0045] The reel drive mechanism 220 includes a rotary drive 221, a rotary shaft 222 rotatably mounted on the main vessel 100, and a reel frame 223 disposed on the rotary shaft 222 and around which the intercepting tape 210 is wound. The rotary drive 221 is drivenly connected to the rotary shaft 222 and is used to drive the rotary shaft 222 to rotate the reel frame 223 to wind up and unwind the intercepting tape 210. The relative height between the reel frame 223 and the rotary shaft 222 is variable.

[0046] When the aforementioned long-arm retraction and deployment device 200 is used, since it includes an intercepting belt 210 and a reel drive mechanism 220, the rotating shaft 222 of the reel drive mechanism 220 is rotatably mounted on the main vessel 100, and the reel frame 223, around which the intercepting belt 210 is mounted, is disposed on the rotating shaft 222. Therefore, when the rotating drive member 221 drives the rotating shaft 222 to rotate, the reel frame 223 can rotate along with the rotating shaft 222 to achieve the retraction and deployment of the intercepting belt 210. Simultaneously, the reel frame 223 and... The adjustable relative height of the rotating shaft 222 allows for the maintenance of the water level of the reel frame 223 and the intercepting strip 210 on it when the draft of the main vessel 100 changes due to the collection and loading of garbage. This prevents the height of the intercepting strip 210 at the main vessel 100 end from changing with the main vessel 100, thus ensuring the interception effect of floating garbage and preventing garbage leakage. Furthermore, the intercepting strip 210 can be automatically extended and retracted via the reel drive mechanism 220, with stepless length adjustment to adapt to different water conditions. Specifically, the rotating drive component 221 can be a motor.

[0047] See Figures 2 to 4 In this embodiment of the invention, the reel frame 223 is circumferentially positioned and can be lifted and lowered on the rotating shaft 222. The reel frame 223 is provided with a float 230, which is used to apply an upward buoyancy to the reel frame 223 so that the water level of the reel frame 223 remains unchanged when the rotating shaft 222 moves up and down with the main ship 100. The reel frame 223 is circumferentially positioned and sleeved on the rotating shaft 222, allowing the reel frame 223 to rotate with the rotating shaft 222 to reel in and unload the intercepting strip 210. On the other hand, by being liftable and having an added float 230, when the draft of the main vessel 100 changes due to collecting and loading garbage, although the rotating shaft 222 will sink with the main vessel 100, the rotating shaft 222 will not exert a downward pulling force on the reel frame 223. Furthermore, since the float 230 has buoyancy, the buoyancy and the weight of the reel frame 223 are balanced. No matter how the draft of the main vessel 100 changes, the water surface height of the reel frame 223 can always remain unchanged, so that the interception depth of the intercepting strip 210 will never change. This achieves adaptive floating of the reel frame 223 and the intercepting strip 210 on the reel frame 223 on the water surface. Furthermore, when the main vessel 100 unloads garbage, the rotating shaft 222 will rise along with the main vessel 100, but the water level of the reel frame 223 and the intercepting strip 210 on the reel frame 223 will never change. Specifically, the floats 230 can be divided into two categories according to their materials: one is sheet metal, including sheet metal drums, and the other is plastic, including ordinary plastic, foam plastic, and reinforced plastic products.

[0048] In addition, the height of the reel holder 223 can be adjusted on the rotating shaft 222 via a lifting mechanism, which can also achieve variable relative height between the reel holder 223 and the rotating shaft 222. The lifting mechanism can be a ball screw or a lifting cylinder, etc.

[0049] like Figure 4 and Figure 5 As shown, in this embodiment of the invention, one of the rotating shaft 222 and the reel holder 223 has a key body 224 extending along the height direction, and the other has a keyway that is keyed to the key body 224. That is, the reel holder 223 can be mounted on the rotating shaft 222 via a key connection, allowing the reel holder 223 to be circumferentially positioned on the rotating shaft 222 while also being able to move up and down on the rotating shaft 222. Furthermore, the key connection ensures the stability of the circumferential positioning. Of course, the present invention is not limited to this. The connection structure between the rotating shaft 222 and the reel frame 223 can also be configured as follows: the reel frame 223 has an elongated waist-shaped hole along the height direction, and the rotating shaft 222 is provided with a clamping crossbar that passes through the waist-shaped hole. The end of the clamping crossbar away from the rotating shaft 222 is provided with a clamping head for abutting against the reel frame 223, and the size of the clamping head is larger than the opening width of the waist-shaped hole. Then the clamping crossbar can circumferentially position the reel frame 223, and when the float 230 pushes the reel frame 223 to float, the waist-shaped hole of the reel frame 223 can move from the upper inner wall abutting against the clamping crossbar to the lower inner wall abutting against the clamping crossbar.

[0050] In this embodiment of the invention, the key body 224 is disposed on the rotating shaft 222, and the keyway is formed on the inner ring of the reel frame 223, with the height of the keyway being greater than the height of the key body 224. That is, when the float 230 pushes the reel frame 223 to float, the keyway of the reel frame 223 can move from abutting against the key body 224 at the upper inner wall to abutting against the key body 224 at the lower inner wall. Thus, the entire key body 224 on the rotating shaft 222 is always within the keyway of the reel frame 223, thereby preventing the reel frame 223 from coming off the rotating shaft 222 along the height direction. At the same time, the relatively small height of the key body 224 also helps to save production costs. Of course, it is also possible for the height of the key body 224 to be greater than that of the keyway. However, in order to ensure that the reel holder 223 can be raised and lowered on the rotating shaft 222, the keyway on the reel holder 223 needs to be set to be bidirectional through. In addition, it is also possible for the key body 224 to be located on the inner ring of the reel holder 223 and the keyway to be formed on the rotating shaft 222.

[0051] Specifically, the key body 224 can be a flat key or a spline key, preferably a flat key. There are two key bodies 224 on the rotating shaft 222 and two keyways on the inner ring of the reel holder 223. The two key bodies 224 are located on opposite sides of the rotating shaft 222, and the two keyways correspond one-to-one with the two key bodies 224. Further, as... Figure 5As shown, in order to ensure that the reel holder 223 can be raised and lowered on the rotating shaft 222, there must be a gap t1 between the top wall of the key body 224 and the bottom of the keyway, a gap t2 between the side wall of the key body 224 and the side wall of the keyway, and a gap t3 between the inner ring of the reel holder 223 and the outer peripheral wall of the rotating shaft 222.

[0052] Please see again Figure 4 In this embodiment of the invention, the reel frame 223 includes an inner sleeve 225, an outer drum 227, and a connecting rod assembly 226. The inner sleeve 225 is located inside the outer drum 227 and is connected to the outer drum 227 via the connecting rod assembly 226. The inner sleeve 225 is fitted onto the rotating shaft 222 and forms a keyway. The outer drum 227 is used to wind the intercepting tape 210. By using the connecting rod assembly 226 to connect the inner sleeve 225 and the outer drum 227 of the reel frame 223, the weight of the entire reel frame 223 can be reduced. Specifically, the linkage assembly 226 includes upper linkages and lower linkages, with multiple upper linkages and lower linkages. Multiple upper linkages are arranged circumferentially and evenly at intervals along the upper end of the inner sleeve 225, and extend out of the outer drum 227 after connecting to the upper end of the outer drum 227. Multiple lower linkages are arranged circumferentially and evenly at intervals along the lower end of the inner sleeve 225, and extend out of the outer drum 227 after connecting to the lower end of the outer drum 227. Thus, the upper and lower linkages can not only connect the inner sleeve 225 and the outer drum 227, but also stop the intercepting strip 210 at the upper and lower ends of the outer drum 227.

[0053] In this embodiment of the invention, the number of floats 230 can be at least two. At least two floats 230 are evenly spaced circumferentially on the inner side of the outer reel 227 to ensure the stability of the reel frame 223 during ascent. Alternatively, at least two floats 230 can be evenly spaced circumferentially on the outer side of the inner sleeve 225.

[0054] In this embodiment of the invention, the float 230 is height-adjustably mounted on the reel frame 223, allowing the height of the float 230 to be adjusted according to actual needs. Specifically, the reel frame 223 has a plurality of mounting holes spaced apart along the height direction, and the float 230 can be installed in mounting holes of different heights selected from the plurality of mounting holes.

[0055] Please see again Figures 1 to 3To achieve the above objectives, the present invention also provides a long-arm vessel, comprising a main vessel 100, a tractor 300, and a long-arm deployment / retraction device 200 as described above. The tractor 300 and the long-arm deployment / retraction device 200 are both two in number, with the two long-arm deployment / retraction devices 200 spaced apart on the main vessel 100. Each of the two tractor 300 is connected to a corresponding interception strip 210 of one of the two long-arm deployment / retraction devices 200. Since the long-arm vessel employs all the technical solutions of the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated further here.

[0056] Specifically, when it is necessary to carry out the interception of floating garbage on the water surface, while the two long-arm extension and retraction devices 200 release the interception belt 210, the two tractor boats 300 sail in a direction away from the main ship 100 to stretch the released interception belt 210 and intercept and collect the floating garbage in the water area.

[0057] In this embodiment of the invention, the main vessel 100 includes a hull 101 with a garbage gravity flow channel 103 and a garbage storage compartment 102 on the hull 101. Under the interception and collection of the interception belt 210, floating garbage on the water surface will flow into the garbage gravity flow channel 103. The hull 101 is also equipped with a conveying device to transfer the garbage in the garbage gravity flow channel 103 to the garbage storage compartment 102. The hull 101 has installation spaces 108 on both sides of the garbage gravity flow channel 103 for the corresponding installation of two long-arm retraction devices 200. The installation spaces 108 allow the long-arm retraction devices 200 to be rolled up and installed inside the main vessel 100, reducing the windward area and thus reducing the sailing resistance of the long-arm vessel.

[0058] Specifically, such as Figure 6 As shown, the installation space 108 has a bottom wall formed on the main vessel 100 for the installation of the lower end of the rotating shaft 222. A self-lubricating bearing 107 stainless steel sleeve 104 is provided on the bottom wall. The self-lubricating bearing 107 stainless steel sleeve 104 is made of waterproof material. The lower end of the rotating shaft 222 passes through the self-lubricating bearing 107 stainless steel sleeve 104. The main vessel 100 also includes a cover plate 105, which is used to cover the installation space 108 on the upper end of the main vessel 100. An installation through hole is provided on the cover plate 105. A bearing seat 106 is provided on the inner side of the cover plate 105 corresponding to the installation through hole. A self-lubricating bearing 107 is provided on the bearing seat 106. The upper end of the rotating shaft 222 passes through the self-lubricating bearing 107 and extends out of the installation through hole to connect with the rotating drive component 221.

[0059] See Figure 7 and Figure 8In this embodiment of the invention, the long-arm vessel also includes a docking structure 400 disposed on the main vessel 100. The docking structure 400 is used to lock or unlock the towing vessel 300. That is, by adding the docking structure 400, the towing vessel 300 can be connected to the main vessel 100 as one unit, which facilitates switching the long-arm vessel mode. When both towing vessels 300 are locked to the main vessel 100 through the docking structure 400, the long-arm extension and retraction device 200 is not working. The two towing vessels 300 can follow the main vessel 100 to the water area where the floating garbage is located, that is, the long-arm vessel is in the navigation mode. When the long-arm vessel reaches the water area where the floating garbage is located, the locking of the two towing vessels 300 on the main vessel 100 can be released first. Then the long-arm extension and retraction device 200 is activated, driving the interception belt 210 to be released. The two towing vessels 300 travel and stretch the corresponding interception belt 210 to intercept and collect the floating garbage in the water area. This state is the long-arm vessel in the working mode. Furthermore, since there are two tractor vessels 300, in order to lock the two tractor vessels 300, the number of docking structures 400 on the main vessel 100 can also be set to two.

[0060] In this embodiment of the invention, the docking structure 400 includes a docking drive 410 and a docking member. The docking drive 410 is mounted on the main vessel 100, and the docking member is driven to connect with the docking drive 410 and is used to lock or unlock the traction vessel 300. The docking drive 410 is used to drive the docking member to approach or move away from the traction vessel 300. That is, by controlling the docking drive 410, the docking member can automatically approach or move away from the traction vessel 300, which is convenient and quick. For example, the docking drive 410 can be a telescopic cylinder such as an electric cylinder or a hydraulic cylinder, and the docking member can be a pin connected to the telescopic cylinder. The traction vessel 300 is provided with a docking hole for docking. First, the traction vessel 300 is controlled to sail until the docking hole on the traction vessel 300 corresponds to the pin. Then, the telescopic cylinder is controlled to drive the pin to insert into the docking hole, thereby locking the traction vessel 300 on the main vessel 100. Controlling the telescopic cylinder to drive the pin to pull out of the docking hole unlocks the traction vessel 300. Of course, the present invention is not limited to this. The docking structure 400 can also be manually locked or unlocked by the tractor 300. For example, the docking component can be a pin. Both the tractor 300 and the main ship 100 are provided with docking holes for docking. The tractor 300 can be controlled to sail until the docking hole on the tractor 300 is aligned with the docking hole on the main ship 100. Then, the pin is manually inserted into the two aligned docking holes to lock the tractor 300 on the main ship 100. The pin is then manually pulled out of the docking hole to unlock the tractor 300.

[0061] In this embodiment of the invention, the docking component can also be a tilting frame 420. The tilting frame 420 includes a mounting part 421 and a docking part 422. The mounting part 421 is movably hinged to the main vessel 100, and the docking part 422 extends out of the float 230 and is used to lock or unlock the traction vessel 300. The cylinder end of the docking drive component 410 is movably hinged to the main vessel 100, and the telescopic rod end of the docking drive component 410 is drivenly connected to the mounting part 421 and is used to drive the tilting frame 420 to tilt downwards to approach the traction vessel 300 and to tilt upwards to move away from the traction vessel 300. That is, the entire docking structure 400 can dock with the traction vessel 300 from above. When it is necessary to lock the traction vessel 300 to the main vessel 100, the telescopic rod end of the docking drive component 410 can be controlled to extend, thereby driving the tilting frame 420 to tilt downwards, so that the docking part 422 of the tilting frame 420 gradually approaches the traction vessel 300 until it reaches the docking position, and then docking and locking are performed at the docking position. Specifically, the docking part 422 and the tractor 300 can be docked and locked by either a pin hole structure or a locking structure. Of course, when the tractor 300 needs to stretch the intercepting strip 210, the locking of the docking part 422 to the tractor 300 can be released first, and then the telescopic rod end of the docking drive 410 can be controlled to retract, thereby driving the tilting frame 420 to tilt upward, so that the docking part 422 of the tilting frame 420 gradually moves away from the tractor 300 until it reaches the appropriate position.

[0062] In the description of this invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0063] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0064] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0065] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A long-arm retraction and extension device, characterized in that, The long arm extension / retraction device (200) includes: Interception belt (210) for connection with tractor (300); The reel drive mechanism (220) includes a rotary drive (221), a rotary shaft (222) rotatably mounted on the main ship (100), and a reel frame (223) disposed on the rotary shaft (222) and around which the intercepting tape (210) is wound. The rotary drive (221) is driven to the rotary shaft (222) and is used to drive the rotary shaft (222) to rotate the reel frame (223) to reel in and unload the intercepting tape (210). The relative height between the reel frame (223) and the rotary shaft (222) is variable. The reel frame (223) is circumferentially positioned and can be raised and lowered on the rotating shaft (222). The reel frame (223) is provided with a float (230). The float (230) is used to apply an upward buoyancy to the reel frame (223) so that the water surface height of the reel frame (223) remains unchanged when the rotating shaft (222) moves up and down with the main ship (100), and drives the interception strip (210) to float adaptively on the water surface.

2. The long arm extension and retraction device according to claim 1, characterized in that, One of the rotating shaft (222) and the reel holder (223) is provided with a key body (224) extending in the height direction, and the other is provided with a keyway that is keyed to the key body (224).

3. The long arm extension and retraction device according to claim 2, characterized in that, The key body (224) is disposed on the rotating shaft (222), the keyway is formed on the inner ring of the reel frame (223), and the height of the keyway is greater than the height of the key body (224).

4. The long arm retraction and extension device according to claim 3, characterized in that, The reel frame (223) includes an inner sleeve (225), an outer drum (227), and a connecting rod assembly (226). The inner sleeve (225) is located inside the outer drum (227) and is connected to the outer drum (227) through the connecting rod assembly (226). The inner sleeve (225) is sleeved on the rotating shaft (222) and forms the keyway. The outer drum (227) is used to wind the intercepting strip (210).

5. The long arm retraction and extension device according to claim 4, characterized in that, The number of the floats (230) is at least two, and the at least two floats (230) are evenly spaced circumferentially on the inner side of the outer drum (227).

6. The long arm extension and retraction device according to claim 1, characterized in that, The float (230) is height-adjustably mounted on the reel frame (223).

7. A long-arm boat, characterized in that, The long-arm vessel includes a main vessel (100), a tractor (300), and a long-arm extension / retraction device (200) according to any one of claims 1 to 6. There are two tractor (300) and two long-arm extension / retraction devices (200). The two long-arm extension / retraction devices (200) are spaced apart on the main vessel (100), and the two tractor (300) are respectively connected to the interception strips (210) of the two long-arm extension / retraction devices (200).

8. The long-arm vessel according to claim 7, characterized in that, The main vessel (100) includes a hull (101) with a garbage gravity flow channel (103) and a garbage storage compartment (102) on the hull (101). The hull (101) has installation spaces (108) on both sides of the garbage gravity flow channel (103) for the two long arm retraction devices (200) to be installed one-to-one.

9. The long-arm vessel according to claim 7, characterized in that, The long-arm vessel also includes a docking structure (400) disposed on the main vessel (100), the docking structure (400) being used to lock or unlock the tractor (300); the docking structure (400) includes a docking drive (410) and a docking member, the docking drive (410) being disposed on the main vessel (100), the docking member being drivenly connected to the docking drive (410) and used to lock or unlock the tractor (300), the docking drive (410) being used to drive the docking member to approach or move away from the tractor (300).

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