Vertical transportation device for offshore wind power accessory component cage

Abstract

The invention provides a vertical transportation device for an offshore wind power accessory component sleeve cage, belongs to the technical field of wind power engineering, and solves the technical problems of component deformation and surface coating damage caused by mutual collision, inconvenience in loading and unloading and low space utilization rate due to the fact that a traditional transportation mode mostly adopts horizontal transportation. A vertical transportation device for offshore wind power accessory component sleeve cages comprises a bottom plate, a fixing ring is fixedly connected to the top of the bottom plate, two dovetail grooves are symmetrically formed in the top of the bottom plate, a plurality of lifting lugs are fixedly connected to the top of the bottom plate, the lifting lugs are annularly and evenly arranged, a plurality of limiting grooves are formed in one side of the fixing ring, and the limiting grooves are symmetrically formed in the other side of the fixing ring. The multiple limiting grooves are annularly and evenly formed, and push plates are slidably connected into the multiple limiting grooves. Through the arrangement of a vertical fixed structure, collision damage can be effectively avoided when components are fixedly transported, meanwhile, the transportation space utilization rate is increased, and the loading and unloading process is simplified.

Description

Technical Field

[0001] This invention belongs to the field of wind power engineering technology and relates to component cages, particularly a vertical transportation device for offshore wind power auxiliary component cages. Background Technology

[0002] In the construction of offshore wind power projects, the transportation of auxiliary components such as cages has always been a critical link affecting construction efficiency. Cages typically come in various sizes and are often irregularly shaped. Traditional transportation methods, often using horizontal transport, not only easily lead to component deformation and surface coating damage due to collisions, but also present problems such as inconvenient loading and unloading and low space utilization. Especially in the marine environment, ship turbulence exacerbates the risk of component displacement, increasing manual fixing costs and safety hazards. Therefore, it is necessary to solve this problem. Summary of the Invention

[0003] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a vertical transport device for offshore wind power auxiliary components cages. The technical problem this invention aims to solve is that traditional transport methods mostly use horizontal transport, which not only easily causes component deformation and surface coating damage due to mutual collisions, but also suffers from inconvenient loading and unloading and low space utilization.

[0004] The objective of this invention can be achieved through the following technical solutions: A vertical transport device for offshore wind turbine auxiliary components includes a base plate. A fixing ring is fixedly connected to the top of the base plate. Two dovetail grooves are symmetrically arranged on the top of the base plate. Multiple lifting lugs are fixedly connected to the top of the base plate, and these lugs are evenly arranged in a ring. Multiple limiting grooves are formed on one side of the fixing ring, and these limiting grooves are evenly arranged in a ring. Push plates are slidably connected inside each of the limiting grooves. Multiple first rollers are rotatably connected to the top and bottom of each push plate, and these first rollers cooperate with the fixing ring. Connecting seats are fixedly connected to the surfaces of each push plate near the lifting lugs. Multiple second rollers are rotatably connected to the bottom of each connecting seat, and these second rollers cooperate with the fixing ring. The multiple push plates... Each of the surfaces away from the lifting lugs has an extrusion groove. Each of the extrusion grooves contains a moving mechanism for moving the push plate. Each of the push plates has four support rods slidably connected to its surface away from the lifting lugs. These four support rods are evenly arranged in a square shape. The other end of each of the four support rods is fixedly connected to one side of a fixing ring. Each of the four support rods has a tension spring fitted onto its surface. One end of each tension spring is fixedly connected to one side of the push plate, and the other end is fixedly connected to one side of the fixing ring. Each of the connecting seats has two symmetrically formed docking grooves at its top. Each of the two docking grooves has a docking plate slidably connected inside. The top of each of the two docking plates is fixedly connected to the same fixing plate. The bottom of each of the two docking plates has a fixing mechanism for fixing the fixing plate.

[0005] The working principle of this invention is as follows: When it is necessary to transport auxiliary components, the first step is to set the specific position of the dovetail groove according to the component size. Once the position is determined, it can be positioned and docked with the component. The second step is to place the auxiliary component vertically on the base plate. After the auxiliary component is placed vertically on the base plate, it can be clamped and fixed from all sides by the push plate and the fixing plate to prevent the component from shifting during transportation. The third step is to check that the fixing status is correct, and then use steel wire ropes and lifting lugs to securely tie the entire device to the transport tooling. The fourth step is to start the crane to lift the device to the designated position on the transport ship to complete the loading. The fifth step is to release the push plate and the fixing plate after transportation to the destination, and then use the crane to lift the device again, remove the auxiliary component, and complete the unloading.

[0006] The moving mechanism includes an adjusting ring rotatably connected to the inside of a fixed ring. A first extrusion plate is fixedly connected to the surface of the adjusting ring near the push plate, and the first extrusion plate and the extrusion groove are mutually engaged. Multiple toothed grooves are formed on the surface of the adjusting ring near the first extrusion plate, and the multiple toothed grooves are evenly arranged in an arc shape. The same toothed roller is engaged on one side of the multiple toothed grooves. The toothed roller is rotatably connected to one side of the fixed ring. A first rotating shaft is fixedly connected to the top of the toothed roller. A first gear is fixedly sleeved on the surface of the first rotating shaft. A second rotating shaft is rotatably connected to the top of the fixed ring near the first gear. A second gear is fixedly sleeved on the surface of the second rotating shaft near the first gear, and the second gear and the first gear are mutually engaged. A worm gear is fixedly sleeved on the top of the second rotating shaft. A worm is engaged on the surface of the worm gear, and the worm is rotatably connected to one side of the fixed ring.

[0007] The above structure allows the push plate to move, thereby achieving the purpose of clamping and fixing the cage-like components.

[0008] The fixing mechanism includes an installation compartment located at the bottom of the connecting seat. Two first limiting rods are fixedly connected inside the installation compartment near the docking plate. Two first adjusting plates are slidably connected to the surfaces of the two first limiting rods. A locking plate is fixedly connected to the surface of each of the two first adjusting plates near the docking plate. A locking groove is formed on the surface of each of the two docking plates near the locking plate, and the first limiting rods and locking plates cooperate with each other. A first spring is sleeved on the surface of each of the two first limiting rods near the two first adjusting plates. One end of each of the two first springs is fixedly connected to one side of the first adjusting plate, and the other end of each of the two first springs is fixedly connected to one side inside the installation compartment. An adjustment mechanism for adjusting the locking plate is provided at the bottom of each of the two first adjusting plates.

[0009] The above structure can be used to fix the mounting plate in place, thus preventing it from becoming loose during use.

[0010] The adjustment mechanism includes four second limiting rods, all of which are fixedly connected to one side of the installation chamber. A second adjusting plate is slidably fitted onto the surface of each of the four second limiting rods. A triangular plate is fixedly connected to the top of the second adjusting plate, and the triangular plate cooperates with the first adjusting plate. A second spring is fitted onto the surface of each of the four second limiting rods. The top ends of each of the four second springs are fixedly connected to one side of the installation chamber, and the bottom ends of each of the four second springs are fixedly connected to one side of the second adjusting plate. A second pressing plate is fixedly connected to the top of the fixing ring near the installation chamber. The second pressing plate is slidably connected to one side of the installation chamber, and the second pressing plate cooperates with the second adjusting plate.

[0011] The above structure allows for adjustment of the card plate to ensure it can be inserted into the fixing plate.

[0012] Compared with existing technologies, the vertical transport device for offshore wind power auxiliary components of this invention has the following advantages: Traditional transport methods mostly use horizontal transport, which is not only prone to deformation and damage to the surface coating due to mutual collisions, but also suffers from inconvenient loading and unloading and low space utilization. The main body of this device is made of steel and is mainly composed of a base plate, dovetail groove, push plate, fixing plate, and lifting lugs. When transporting auxiliary components, the first step is to set the specific position of the dovetail groove according to the component size. Once the position is determined, it can be positioned and docked with the component. The second step is to place the auxiliary component vertically on the base plate. After the auxiliary component is placed vertically on the base plate, the push plate and fixing plate can clamp and fix it from all sides to prevent the component from shifting during transportation. The third step is to check that the fixing status is correct, and then use steel wire ropes and lifting lugs to securely tie the entire device to the transport tooling. The fourth step is to start the crane to lift the device to the designated position on the transport vessel to complete the loading. The fifth step is to release the push plate and fixing plate after transporting to the destination, and then use the crane to lift the device again to remove the auxiliary component and complete the unloading. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of a vertical transport device for offshore wind power auxiliary components cage according to the present invention. Figure 2 This is a schematic diagram of the internal structure of a vertical transport device for offshore wind power auxiliary components cages in this invention. Figure 3 This is a schematic diagram of the moving mechanism of a vertical transport device for offshore wind power auxiliary components cages in this invention; Figure 4 yes Figure 3 Enlarged structural diagram at point A in the diagram; Figure 5 yes Figure 3 Enlarged structural diagram at point B in the diagram; Figure 6 This is a schematic diagram of the fixing mechanism of a vertical transport device for offshore wind power auxiliary components cages in this invention; Figure 7 Figure 6 A magnified structural diagram at point C in the diagram.

[0014] In the diagram: 1. Base plate; 2. Fixing ring; 3. Push plate; 4. Fixing plate; 101. Lifting lug; 102. Dovetail groove; 201. Limiting groove; 202. Adjusting ring; 203. First extrusion plate; 204. Tooth groove; 205. First rotating shaft; 206. Toothed roller; 207. First gear; 208. Second rotating shaft; 209. Second gear; 210. Worm gear; 211. Worm; 301. Extrusion groove; 302. Support rod; 304. Tension spring; 305. First roller; 306. Connecting seat; 307. Docking groove; 308. Mounting chamber; 309. Second roller; 401. Docking plate; 402. Slot; 403. First adjusting plate; 404. Clamping plate; 405. First limiting rod; 406. First spring; 407. Triangular plate; 408. Second adjusting plate; 409. Second limiting rod; 410. Second spring; 411. Second pressing plate. Detailed Implementation

[0015] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0016] like Figure 1 - Figure 7As shown, a vertical transport device for offshore wind power auxiliary components includes a base plate 1. A fixing ring 2 is fixedly connected to the top of the base plate 1. Two dovetail grooves 102 are symmetrically arranged on the top of the base plate 1. Multiple lifting lugs 101 are fixedly connected to the top of the base plate 1, and the multiple lifting lugs 101 are evenly arranged in a ring. Multiple limiting grooves 201 are opened on one side of the fixing ring 2, and the multiple limiting grooves 201 are evenly arranged in a ring. Push plates 3 are slidably connected inside the multiple limiting grooves 201. Multiple first rollers 305 are rotatably connected to the top and bottom of the push plates 3, and the multiple first rollers 305 are all configured to cooperate with the fixing ring 2. Connecting seats 306 are fixedly connected to the surface of the multiple push plates 3 near the lifting lugs 101. Multiple second rollers 309 are rotatably connected to the bottom of the multiple connecting seats 306, and the multiple second rollers 309 are all configured to cooperate with the fixing ring 2. The multiple push plates 3 are further away from the lifting lugs 101. Each of the lifting lugs 101 has a pressing groove 301 on one side surface. Each pressing groove 301 has a moving mechanism for moving the push plate 3. Each of the push plates 3 has four support rods 302 slidably connected to the side surface away from the lifting lugs 101. The four support rods 302 are evenly arranged in a square shape. The other end of each of the four support rods 302 is fixedly connected to one side inside the fixing ring 2. Each of the four support rods 302 has a tension spring 304 sleeved on its surface. One end of each of the four tension springs 304 is fixedly connected to one side of the push plate 3. The other end of each of the four tension springs 304 is fixedly connected to one side inside the fixing ring 2. Each of the multiple connecting seats 306 has two docking grooves 307 symmetrically opened on its top. Each of the two docking grooves 307 has a docking plate 401 slidably connected inside its top surface. The top of each of the two docking plates 401 is fixedly connected to the same fixing plate 4. Each of the two docking plates 401 has a fixing mechanism for fixing the fixing plate 4 at its bottom surface.

[0017] Preferably, the moving mechanism includes an adjusting ring 202, which is rotatably connected to the inside of the fixed ring 2. A first extrusion plate 203 is fixedly connected to the surface of the adjusting ring 202 near the push plate 3, and the first extrusion plate 203 and the extrusion groove 301 are mutually cooperated. A plurality of toothed grooves 204 are formed on the surface of the adjusting ring 202 near the first extrusion plate 203, and the plurality of toothed grooves 204 are uniformly arranged in an arc shape. A toothed roller 206 is fitted on one side of the plurality of toothed grooves 204, and the toothed roller 206 is rotatably connected to one side of the fixed ring 2. A first rotating shaft 205 is fixedly connected to the top of the fixed ring 206. A first gear 207 is fixedly sleeved on the surface of the first rotating shaft 205. A second rotating shaft 208 is rotatably connected to the top of the fixed ring 2 near the first gear 207. A second gear 209 is fixedly sleeved on the surface of the second rotating shaft 208 near the first gear 207, and the second gear 209 and the first gear 207 are mutually engaged. A worm gear 210 is fixedly sleeved on the top of the second rotating shaft 208. A worm 211 is fitted on the surface of the worm gear 210, and the worm 211 is rotatably connected to one side of the fixed ring 2.

[0018] Preferably, the fixing mechanism includes an installation chamber 308, which is located at the bottom of the connecting seat 306. Two first limiting rods 405 are fixedly connected inside the installation chamber 308 near the docking plate 401. Two first adjusting plates 403 are slidably connected to the surfaces of the two first limiting rods 405. A retaining plate 404 is fixedly connected to the surface of each of the two first adjusting plates 403 near the docking plate 401. A retaining groove 402 is provided on the surface of each of the two docking plates 401 near the retaining plate 404, and the first limiting rods 405 and retaining plates 404 are mutually engaged. A first spring 406 is sleeved on the surface of each of the two first limiting rods 405 near the two first adjusting plates 403. One end of each of the two first springs 406 is fixedly connected to one side of the first adjusting plate 403, and the other end of each of the two first springs 406 is fixedly connected to the inside of the installation chamber 308. An adjustment mechanism for adjusting the retaining plate 404 is provided at the bottom of each of the two first adjusting plates 403.

[0019] Furthermore, the adjustment mechanism includes four second limiting rods 409, all of which are fixedly connected to one side of the installation chamber 308. The same second adjusting plate 408 is slidably sleeved on the surface of the four second limiting rods 409. A triangular plate 407 is fixedly connected to the top of the second adjusting plate 408, and the triangular plate 407 is configured to cooperate with the first adjusting plate 403. A second spring 410 is sleeved on the surface of each of the four second limiting rods 409. The top of each of the four second springs 410 is fixedly connected to one side of the installation chamber 308, and the bottom of each of the four second springs 410 is fixedly connected to one side of the second adjusting plate 408. A second pressing plate 411 is fixedly connected to the top of the fixing ring 2 near the installation chamber 308. The second pressing plate 411 is slidably connected to one side of the installation chamber 308, and the second pressing plate 411 is configured to cooperate with the second adjusting plate 408.

[0020] The working principle of this invention: The main body of the device is made of steel and is mainly composed of a base plate 1, a dovetail groove 102, a push plate 3, a fixing plate 4, and a lifting lug 101. When it is necessary to transport auxiliary components, the first step is to set the specific position of the dovetail groove according to the size of the component. After the position is determined, it can be positioned and docked with the component. The second step is to place the auxiliary component vertically on the base plate 1. After the auxiliary component is placed vertically on the base plate 1, the worm 211 at the top of the base plate 1 will rotate. A worm wheel 210 is fitted on one side of the worm 211. The worm wheel 210 is connected to the second gear 209 through the second rotating shaft 208. So when the worm 211 rotates, the second gear 209 will rotate synchronously. A fixing ring 2 is set on the top of the base plate 1. An adjusting ring 202 is set inside the fixing ring 2. A toothed groove 204 is opened on one side of the adjusting ring 202. A toothed roller 206 is fitted on the surface of the toothed groove 204. The toothed roller 206 is connected to the first gear 207. The gear 206 rotates synchronously with the second gear 209, thus rotating the adjusting ring 202. Multiple push plates 3 are installed on one side of the fixed ring 2, arranged in a ring. Each push plate 3 has a pressing groove 301 on one side, which engages with a first pressing plate 203 on one side of the adjusting ring 202. Because the surface of the first pressing plate 203 near the pressing groove 301 is inclined, the first pressing plate 203 presses the push plate 3 as the adjusting ring 202 rotates, causing it to move and thus clamping and fixing the component. A connecting seat 306 is installed on the top of the push plate 3, and a fixing plate 4 is installed on the top of the connecting seat 306. The fixing plate 4 is designed according to the component's shape, allowing for better component fixation. Two mating grooves 307 are opened on the top of the connecting seat 306, and both grooves 307 are connected to the bottom of the fixing plate 4. The mating plate 401 is adapted to ensure that the fixing plate 4 and the connecting seat 306 can be connected and fixed. A triangular plate 407 is provided at the bottom of the connecting seat 306, and the triangular plate 407 cooperates with the second pressing plate 411 at the top of the fixing ring 2. Because the side of the second pressing plate 411 near the triangular plate 407 is inclined, when the push plate 3 moves the connecting seat 306, the second pressing plate 411 will press the triangular plate 407, thereby moving it upward. The top of the angle plate 407 is provided with two first adjusting plates 403, both of which cooperate with the angle plate 407. As the angle plate 407 moves upward, it presses against the two first adjusting plates 403, causing them to move to the sides. Each of the two first adjusting plates 403 has a locking plate 404 installed on one side, which cooperates with a slot 402 on one side of the docking plate 401. Thus, as the first adjusting plates 403 continue to move...The clamping plate 404 enters the clamping slot 402 to constrain the fixing plate 4. The push plate 3 and fixing plate 4 clamp and secure the component from all sides, preventing displacement during transport. Third, after verifying the fixing is correct, the entire device is securely tied to the transport equipment using wire ropes and lifting lugs 101. Fourth, the crane is started to lift the device to the designated location on the transport vessel, completing the loading. Fifth, after reaching the destination, the push plate 3 and fixing plate 4 are released, and the device is lifted again by the crane to remove the auxiliary components, completing the unloading.

[0021] In summary, the core beneficial effects of this invention are that the device, through its vertical structural design, secures and transports components, effectively preventing collision damage, while simultaneously improving the utilization rate of transport space and simplifying the loading and unloading process. During implementation, to ensure that the components do not sway or shift during transport, dovetail grooves 102, push plates 3, and fixing plates 4 are installed on the tooling. This device allows for easy transport of the cage, thereby saving manual labor and effectively preventing damage to the anti-corrosion coating of the cage. The vertical structural design increases the utilization rate of transport space by 40%, reduces the number of round trips by transport vessels, and, combined with the simplified loading and unloading process, accelerates on-site construction progress by 25%.

[0022] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A vertical transport device for offshore wind power auxiliary components, comprising a base plate (1), characterized in that, A fixing ring (2) is fixedly connected to the top of the base plate (1). Two dovetail grooves (102) are symmetrically arranged on the top of the base plate (1). Multiple lifting lugs (101) are fixedly connected to the top of the base plate (1), and the multiple lifting lugs (101) are evenly arranged in a ring. Multiple limiting grooves (201) are opened on one side of the fixing ring (2), and the multiple limiting grooves (201) are evenly arranged in a ring. A push plate (3) is slidably connected inside each of the multiple limiting grooves (201). The top of the push plate (3) is connected to... Each of the push plates (3) is rotatably connected to a plurality of first rollers (305), and each of the plurality of first rollers (305) is configured to cooperate with a fixed ring (2). Each of the plurality of push plates (3) is fixedly connected to a connecting seat (306) on the side of the push plate (3) near the lifting lug (101). Each of the plurality of connecting seats (306) is rotatably connected to a plurality of second rollers (309) on the bottom, and each of the plurality of second rollers (309) is configured to cooperate with a fixed ring (2). Each of the plurality of push plates (3) is opened on the side of the push plate (3) away from the lifting lug (101). Each of the extrusion grooves (301) has a moving mechanism for moving the push plate (3). Four support rods (302) are slidably connected to the surface of each push plate (3) away from the lifting lug (101). The four support rods (302) are evenly arranged in a square shape. The other end of each support rod (302) is fixedly connected to one side of the inside of the fixing ring (2). Tension springs (304) are sleeved on the surface of each support rod (302). One end of each of the four tension springs (304) is fixedly connected to one side of the push plate (3), and the other end of each of the four tension springs (304) is fixedly connected to one side of the inside of the fixing ring (2). Two docking slots (307) are symmetrically opened on the top of each of the multiple connecting seats (306). A docking plate (401) is slidably connected inside each of the two docking slots (307). The same fixing plate (4) is fixedly connected to the top of each of the two docking plates (401). A fixing mechanism for fixing the fixing plate (4) is provided at the bottom of each of the two docking plates (401).

2. The vertical transport device for offshore wind power auxiliary components cages according to claim 1, characterized in that, The moving mechanism includes an adjusting ring (202), which is rotatably connected to the inside of the fixed ring (2). A first extrusion plate (203) is fixedly connected to the surface of the adjusting ring (202) near the push plate (3), and the first extrusion plate (203) and the extrusion groove (301) are mutually cooperated. Multiple toothed grooves (204) are opened on the surface of the adjusting ring (202) near the first extrusion plate (203), and the multiple toothed grooves (204) are evenly arranged in an arc shape. The same toothed roller (206) is cooperated on one side of the multiple toothed grooves (204), and the toothed roller (206) is rotatably connected to one side of the fixed ring (2).

3. The vertical transport device for offshore wind power auxiliary components cages according to claim 2, characterized in that, The top of the toothed roller (206) is fixedly connected to a first rotating shaft (205), and a first gear (207) is fixedly sleeved on the surface of the first rotating shaft (205). The top of the fixed ring (2) near the first gear (207) is rotatably connected to a second rotating shaft (208). The surface of the second rotating shaft (208) near the first gear (207) is fixedly sleeved with a second gear (209), and the second gear (209) and the first gear (207) are mutually engaged. The top of the second rotating shaft (208) is fixedly sleeved with a worm gear (210), and a worm (211) is engaged on the surface of the worm gear (210). The worm (211) is rotatably connected to one side of the fixed ring (2).

4. The vertical transport device for offshore wind power auxiliary components cages according to claim 1, characterized in that, The fixing mechanism includes an installation chamber (308), which is located at the bottom of the connecting seat (306). Two first limiting rods (405) are fixedly connected inside the installation chamber (308) on the side near the docking plate (401). Two first adjusting plates (403) are slidably connected to the surfaces of the two first limiting rods (405). A card plate (404) is fixedly connected to the surface of the two first adjusting plates (403) on the side near the docking plate (401). A slot (402) is provided on the surface of the two docking plates (401) on the side near the card plate (404).

5. The vertical transport device for offshore wind power auxiliary components cages according to claim 4, characterized in that, Furthermore, the first limiting rod (405) and the clamping plate (404) are configured to cooperate with each other. The two first limiting rods (405) are each fitted with a first spring (406) on the surface of the side of the two first adjusting plates (403). One end of each of the two first springs (406) is fixedly connected to one side of the first adjusting plate (403), and the other end of each of the two first springs (406) is fixedly connected to one side of the inside of the installation chamber (308). The bottom of each of the two first adjusting plates (403) is provided with an adjustment mechanism for adjusting the clamping plate (404).

6. The vertical transport device for offshore wind power auxiliary components cages according to claim 5, characterized in that, The adjustment mechanism includes four second limiting rods (409), all of which are fixedly connected to one side inside the installation chamber (308). The same second adjusting plate (408) is slidably sleeved on the surface of the four second limiting rods (409). A triangular plate (407) is fixedly connected to the top of the second adjusting plate (408), and the triangular plate (407) and the first adjusting plate (403) are mutually cooperated. A second spring (410) is sleeved on the surface of each of the four second limiting rods (409).

7. The vertical transport device for offshore wind power auxiliary components cages according to claim 6, characterized in that, The top ends of the four second springs (410) are fixedly connected to one side of the inside of the installation chamber (308), and the bottom ends of the four second springs (410) are fixedly connected to one side of the second adjusting plate (408). The top of the fixing ring (2) near the installation chamber (308) is fixedly connected to the second extrusion plate (411). The second extrusion plate (411) is slidably connected to one side of the inside of the installation chamber (308), and the second extrusion plate (411) and the second adjusting plate (408) are configured to cooperate with each other.

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