Peony grafting device for megaphanerophyte and grafting process thereof

Abstract

The invention relates to the field of grafting, and discloses a peony grafting device for megaphanerophytes and a grafting technology.The peony grafting device for the megaphanerophytes comprises a mounting frame, a two-way lead screw is rotationally connected to the interior of the mounting frame, a worm gear is fixedly connected to the middle of the two-way lead screw, and the tooth end of the worm gear is connected with a gear ring in an engaged mode; the top of the gear ring is fixedly connected with an annular sliding block, the outer wall of the annular sliding block is slidably connected into the annular sliding groove, the top of the gear ring is fixedly connected with a supporting column, the bottom of the supporting column is rotatably connected with a connecting rod, the interior of the mounting frame is rotatably connected with a rotating shaft, and a grafting film coiled material is arranged on the outer wall of the rotating shaft. The free end of the grafting film coiled material is wound on the outer walls of the scion and the stock, the gear ring drives the grafting film coiled material to rotate around the outer wall of the grafting connector of the megaphanerophyte stock and the peony scion through rotation of the worm wheel, sealing operation of the connector is achieved, and therefore the grafting survival rate is increased.

Description

Technical Field

[0001] This invention relates to the field of grafting technology, specifically to a grafting device and grafting process for large trees of peony. Background Technology

[0002] Grafting is a propagation method that involves attaching a bud or branch from one plant to another, allowing the two parts to grow into a single, complete plant. The bud or branch that is grafted is called the scion, and the plant to which it is grafted is called the rootstock. Peonies are deciduous shrubs, and their height is traditionally limited when planted in the ground. By grafting peonies onto large trees whose ornamental value has decreased, high grafting of peonies can preserve the tree's framework while giving it a completely new, flourishing flowering landscape, thus revitalizing the tree.

[0003] In traditional grafting devices, after the plant is grafted, the grafting interface is simply fixed with a clamp. This results in a lack of continuous seal around the interface, which easily leads to gaps. As a result, the rate of water evaporation inside the interface is accelerated, and the cells of the cambium layer of the scion and rootstock dehydrate and shrink more quickly, which leads to a decrease in the grafting survival rate. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a grafting device and grafting process for large peony trees. This solves the problem that traditional grafting devices, after the plant is grafted, only fix the grafting interface with a clamp, which results in the inability to form a continuous seal around the interface, easily leading to gaps. This causes the internal moisture evaporation rate of the interface to accelerate, and the cells of the cambium layer of the scion and rootstock to dehydrate and shrink more rapidly, thus reducing the grafting survival rate.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a grafting device for large trees of peony, comprising an installation frame, a bidirectional lead screw rotatably connected inside the installation frame, a worm gear fixedly connected to the middle of the bidirectional lead screw, a gear ring meshing with the tooth end of the worm gear, an annular slider fixedly connected to the top of the gear ring, an installation ring fixedly connected to one side of the installation frame, an annular groove with an opening downwards inside the installation ring, the outer wall of the annular slider slidably connected within the annular groove, a support column fixedly connected to the top of the gear ring, a connecting rod rotatably connected to the bottom of the support column, an installation frame fixedly connected to one end of the connecting rod, a rotating shaft rotatably connected inside the installation frame, a grafting film roll provided on the outer wall of the rotating shaft, and an adjustment component installed on the top of the support column.

[0006] By adopting the above technical solution, during the grafting process, the free end of the grafting film roll is first wrapped around the outer wall of the scion and rootstock. The rotation of the worm gear drives the toothed ring, which in turn drives the annular slider to slide in the annular groove. This, in turn, drives the support column, connecting rod, and mounting frame to rotate, ultimately causing the grafting film roll to rotate around the outer wall of the grafting interface between the large tree rootstock and the peony scion. This ensures that the grafting film is evenly wrapped around the interface, achieving a sealing operation. This ensures that the grafting film fits tightly against the interface, effectively preventing moisture loss and pathogen invasion, thereby improving the survival rate of the graft.

[0007] Preferably, the adjusting assembly includes a limiting plate, one end of which is fixedly connected to the top of the support column. An arc-shaped groove is formed inside the limiting plate. A limiting rod is fixedly connected to the top of one end of the connecting rod. The outer wall of the limiting rod is slidably connected to the arc-shaped groove. A nut is threadedly connected to the outer wall of the limiting rod, and the bottom of the nut abuts against the top of the limiting plate.

[0008] Preferably, a threaded rod is fixedly connected to the bottom of the rotating shaft, and a nut is threaded onto the outer wall of the threaded rod.

[0009] Preferably, the toothed end of the worm gear is meshed with a worm, the outer walls of both ends of the worm are rotatably connected to the mounting frame, a handle is fixedly connected to one side of the worm, and a grip is fixedly connected to one side of the handle.

[0010] Preferably, both ends of the bidirectional lead screw are rotatably connected to limit blocks, and a guide rod is symmetrically fixedly connected to the bottom of one of the limit blocks, and rod holes are symmetrically opened inside the mounting frame.

[0011] Preferably, one end of each of the two guide rods is slidably connected in the rod hole, and one end of each of the two guide rods is fixedly connected to the top of the other limiting block.

[0012] Preferably, both ends of the two guide rods are slidably connected to moving blocks, the middle of the moving blocks is threaded to the outer wall of the bidirectional lead screw, and an arc-shaped ring is fixedly connected to one side of the moving blocks.

[0013] Preferably, one end of the arc-shaped ring is symmetrically fixedly connected to a support plate, and the two support plates are rotatably connected to opposite sides of a bidirectional screw, with one end of the bidirectional screw fixedly connected to a rotating handle.

[0014] Preferably, the outer wall of the bidirectional screw is symmetrically threaded with movable plates, and the two movable plates are slidably connected with support rods. The two ends of the support rods are fixedly connected between the two support plates, and an arc-shaped clamping plate is fixedly connected to one side of the movable plate.

[0015] A grafting technique for large trees with peony includes the following steps:

[0016] When in use, place the installation ring on the outer wall of the large tree rootstock, loosen the nut, and let the limit rod slide along the arc groove, which will drive the connecting rod, the mounting frame and the grafting film roll to adjust their positions until they contact the outer wall of the interface. Tighten the nut to lock the limit rod.

[0017] Wrap the free end of the grafting film roll around the outer wall of the scion and rootstock, then turn the handle to drive the worm gear to rotate, which in turn drives the worm wheel and the double-acting screw to rotate. The moving blocks move towards each other under the guidance of the guide rod, which in turn moves the arc ring to both ends of the interface.

[0018] At the same time, the worm gear will drive the gear ring and the annular slider to slide along the annular groove. The support column, connecting rod, mounting bracket and rotating shaft will rotate synchronously. The grafting film will be wrapped around the interface. After the arc ring is adjusted to the positions of both ends of the interface, the grafting film will be cut.

[0019] Then rotate the rotating handle to drive the bidirectional screw to rotate, and the movable plate slides along the support rod to drive the arc-shaped clamp to fix the top and bottom of the interface;

[0020] When installing or removing the grafting film roll, remove the nut, remove or install the grafting film roll from the shaft, and then put the nut back on.

[0021] This invention provides a grafting device and grafting process for large peony trees. It has the following beneficial effects:

[0022] 1. In this invention, during the grafting process, the free end of the grafting film roll is first wrapped around the outer wall of the scion and rootstock. The rotation of the worm gear drives the toothed ring, which in turn drives the annular slider to slide in the annular groove. This, in turn, drives the support column, connecting rod, and mounting frame to rotate. Finally, the grafting film roll rotates around the outer wall of the grafting interface between the large tree rootstock and the peony scion, evenly wrapping the grafting film around the interface and achieving a sealing operation. This ensures that the grafting film fits tightly to the interface, effectively preventing moisture loss and pathogen invasion, thereby improving the survival rate of the graft.

[0023] 2. This invention rotates the handle, causing the handle and worm to rotate. The worm drives the worm wheel, which meshes with its toothed end, to rotate. The worm wheel drives the bidirectional lead screw to rotate. The bidirectional lead screw rotates within the limiting block, causing the moving blocks to move towards each other under the guidance of the guide rod. The movement of the moving blocks drives the arc-shaped ring to move, thereby moving the arc-shaped ring to both ends of the interface. This enables precise fixing of interfaces of different heights, ensuring the stability of the plant during grafting and facilitating successful grafting.

[0024] 3. This invention releases the nut from fixing the limiting rod, allowing the limiting rod to slide within the arc-shaped groove inside the limiting plate. The connecting rod changes angle as the limiting rod slides, thereby changing the position of the mounting frame and the grafting film roll. This allows the grafting film roll to contact the outer wall of the interface. After adjusting to the appropriate position, the nut is tightened so that the bottom of the nut abuts against the top of the limiting plate, thus locking the position of the limiting rod. This allows the device to adapt to the film covering needs of plants of different sizes, improving the versatility and practicality of the device. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0026] Figure 2 This is a partial schematic diagram of the mounting ring of the present invention;

[0027] Figure 3 for Figure 2 Enlarged structural diagram at point A in the middle;

[0028] Figure 4 for Figure 2 Enlarged structural diagram at point B;

[0029] Figure 5 This is a partial schematic diagram of the mounting bracket of the present invention;

[0030] Figure 6 This is a partial schematic diagram of the grafting film roll of the present invention;

[0031] Figure 7 This is a partial schematic diagram of the adjustment component of the present invention;

[0032] Figure 8 This is a partial schematic diagram of the arc-shaped ring of the present invention;

[0033] Figure 9 This is a partial schematic diagram of the arc-shaped clamping plate of the present invention.

[0034] The components include: 1. Mounting frame; 2. Bidirectional lead screw; 201. Worm gear; 202. Gear ring; 203. Annular slider; 204. Mounting ring; 205. Support column; 206. Connecting rod; 207. Mounting bracket; 208. Rotating shaft; 209. Grafting film roll; 3. Limiting plate; 301. Arc groove; 302. Limiting rod; 303. Nut; 4. Threaded rod; 401. Nut; 5. Worm; 501. Handle; 502. Grip; 6. Limiting block; 601. Guide rod; 7. Moving block; 701. Arc ring; 8. Support plate; 801. Bidirectional lead screw; 802. Rotating handle; 803. Movable plate; 804. Support rod; 805. Arc clamping plate. Detailed Implementation

[0035] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] Please see the appendix Figure 1 - Appendix Figure 3 Appendix Figure 5 - Appendix Figure 7 This invention provides a grafting device for large peony trees, including a mounting frame 1. A bidirectional lead screw 2 is rotatably connected inside the mounting frame 1. A worm gear 201 is fixedly connected to the middle of the bidirectional lead screw 2. A gear ring 202 is meshed with the tooth end of the worm gear 201. An annular slider 203 is fixedly connected to the top of the gear ring 202. A mounting ring 204 is fixedly connected to one side of the mounting frame 1. An annular groove with an opening facing downwards is opened inside the mounting ring 204. The outer wall of the annular slider 203 is slidably connected to the annular groove. A support column 205 is fixedly connected to the top of the gear ring 202. A connecting rod 206 is rotatably connected to the bottom of the support column 205. A mounting frame 207 is fixedly connected to one end of the connecting rod 206. A rotating shaft 208 is rotatably connected inside the mounting frame 207. A grafting film roll 209 is provided on the outer wall of the rotating shaft 208. An adjustment component is installed on the top of the support column 205.

[0037] Specifically, during the grafting process, the free end of the grafting film roll 209 is first wrapped around the outer wall of the scion and rootstock. When the worm gear 201 rotates, it drives the gear ring 202, which is meshed with it, to rotate. During the rotation of the gear ring 202, the annular slider 203 is moved to slide in the annular groove. The rotation of the gear ring 202 further drives the support column 205 to rotate. The support column 205 drives the connecting rod 206 and the mounting frame 207, which are rotatably connected at the bottom, to rotate. The rotating shaft 208, which is rotatably connected inside the mounting frame 207, rotates accordingly, thereby causing the grafting film roll 209 to rotate around the outer wall of the grafting interface between the large tree rootstock and the peony scion. This evenly wraps the grafting film around the interface, achieving a sealing operation of the interface, ensuring that the grafting film fits tightly to the interface, effectively preventing water loss and pathogen invasion, and improving the survival rate of the graft. At the same time, by adjusting the operation of the components, the device can adapt to the film covering needs of plants of different sizes, improving the versatility and practicality of the device.

[0038] Please see the appendix Figure 4 Appendix Figure 6 Appendix Figure 7The adjustment component includes a limiting plate 3, one end of which is fixedly connected to the top of the support column 205. An arc-shaped groove 301 is provided inside the limiting plate 3. A limiting rod 302 is fixedly connected to the top of one end of the connecting rod 206. The outer wall of the limiting rod 302 is slidably connected in the arc-shaped groove 301. A nut 303 is threadedly connected to the outer wall of the limiting rod 302. The bottom of the nut 303 is pressed against the top of the limiting plate 3.

[0039] Specifically, the plant being grafted is a large tree, which is the rootstock, and the plant being grafted onto is a peony branch, which is the scion.

[0040] Before grafting, the mounting ring 204 is fitted onto the outer wall of the plant to be grafted, so that the grafting interface is in the position of the mounting ring 204, providing stable support for subsequent fixing operations.

[0041] After installing the mounting ring 204 before grafting, keep the plant in the center of the mounting ring 204. When performing mulching operations on large trees of different sizes, it is necessary to adjust the contact between the grafting film roll 209 and the outer wall of the interface. First, loosen the nut 303 to release the fixing of the nut 303 to the limiting rod 302. Let the limiting rod 302 slide in the arc groove 301 opened inside the limiting plate 3. The connecting rod 206 will change its angle as the limiting rod 302 slides, thereby driving the mounting frame 207 and the grafting film roll 209 to change their positions, so that the grafting film roll 209 contacts the outer wall of the interface. After adjusting to the appropriate position, tighten the nut 303 so that the bottom of the nut 303 presses against the top of the limiting plate 3, thereby locking the position of the limiting rod 302. This allows the device to adapt to the mulching needs of plants of different sizes, improving the versatility and practicality of the device.

[0042] Please see the appendix Figure 5 A threaded rod 4 is fixedly connected to the bottom of the rotating shaft 208, and a nut 401 is threadedly connected to the outer wall of the threaded rod 4.

[0043] Specifically, when it is necessary to install or remove and replace the grafting film roll 209, simply remove the nut 401 from the outer wall of the threaded rod 4. At this time, the shaft 208 is no longer restricted by the nut 401, so the grafting film roll 209 can be easily removed from the shaft 208 or a new grafting film roll 209 can be installed on the outer wall of the shaft 208. This facilitates the installation, disassembly and replacement of the grafting film roll 209 and improves the efficiency of grafting work.

[0044] Please see the appendix Figure 1 - Appendix Figure 2 , Figure 6 - Appendix Figure 9 The tooth end of the worm gear 201 is meshed with the worm 5. The outer walls of both ends of the worm 5 are rotatably connected to the mounting frame 1. A handle 501 is fixedly connected to one side of the worm 5, and a grip 502 is fixedly connected to one side of the handle 501.

[0045] Both ends of the bidirectional lead screw 2 are rotatably connected to limit blocks 6, and a guide rod 601 is symmetrically fixedly connected to the bottom of one of the limit blocks 6. Rod holes are symmetrically opened inside the mounting frame 1.

[0046] One end of each of the two guide rods 601 is slidably connected to the rod hole, and the other end of each of the two guide rods 601 is fixedly connected to the top of another limiting block 6;

[0047] Both ends of the two guide rods 601 are slidably connected to moving blocks 7. The middle of the moving blocks 7 is threaded to the outer wall of the bidirectional lead screw 2. An arc-shaped ring 701 is fixedly connected to one side of the moving blocks 7.

[0048] Specifically, by rotating the handle 502, the handle 502 drives the handle 501 to rotate, the handle 501 drives the worm 5 to rotate, the worm 5 drives the worm wheel 201 connected to its tooth end to rotate, the worm wheel 201 drives the bidirectional lead screw 2 to rotate, the bidirectional lead screw 2 rotates within the limiting block 6, so that the moving blocks 7 move towards each other under the guidance of the guide rod 601. The movement of the moving blocks 7 drives the arc ring 701 to move, thereby enabling the arc ring 701 to be moved to both ends of the interface respectively, realizing precise fixing operation according to the interface of different heights, ensuring the stability of the plant during the grafting process, and facilitating the success of grafting.

[0049] Please see the appendix Figure 1 Appendix Figure 8 Appendix Figure 9 One end of the arc ring 701 is symmetrically fixedly connected to a support plate 8, and the opposite sides of the two support plates 8 are rotatably connected to a bidirectional screw 801, and one end of the bidirectional screw 801 is fixedly connected to a rotating handle 802.

[0050] The outer wall of the bidirectional screw 801 is symmetrically threaded with movable plates 803. The two movable plates 803 are slidably connected with support rods 804. The two ends of the support rods 804 are fixedly connected between the two support plates 803. An arc-shaped clamping plate 805 is fixedly connected to one side of the movable plate 803.

[0051] Specifically, after adjusting the arc ring 701 to the position of the grafting interface, when fixing the grafting interface, first cut the wrapped grafting film. At this time, the side of the grafting film roll 209 close to the installation frame 1 does not affect the further fixing of the interface by the arc clamp 805. By rotating the rotating handle 802, the rotating handle 802 drives the bidirectional screw 801 to rotate. The movable plate 803 slides towards each other with the cooperation of the support rod 804, thereby driving the arc clamp 805 to move towards each other. The arc clamp 805 can fix the top and bottom of the grafting interface and can adapt to grafting plants of different sizes, making the grafting part more stable, reducing the loosening of the interface caused by external factors, and further improving the survival rate of grafting.

[0052] It should be noted that both the bidirectional lead screw 2 and the bidirectional screw 801 are trapezoidal lead screws, which have a certain self-locking performance, thus ensuring the stability of the arc ring 701 and the arc clamp 805. Furthermore, the device needs to be maintained after each grafting operation.

[0053] A grafting technique for large trees with peony includes the following steps:

[0054] When in use, install the installation ring 204 on the outer wall of the large tree rootstock, loosen the nut 303, and let the limiting rod 302 slide along the arc groove 301, which will drive the connecting rod 206, the mounting bracket 207 and the grafting film roll 209 to adjust their positions until they contact the outer wall of the interface. Tighten the nut 303 to lock the limiting rod 302.

[0055] Wrap the free end of the grafting film roll 209 around the outer wall of the scion and rootstock, then rotate the handle 502, which drives the worm gear 5 to rotate through the handle 501, driving the worm wheel 201 and the bidirectional lead screw 2 to rotate. The moving blocks 7 move towards each other under the guidance of the guide rod 601, driving the arc ring 701 to move to both ends of the interface.

[0056] At the same time, the worm gear 201 will drive the gear ring 202 and the annular slider 203 to slide along the annular groove. The support column 205, connecting rod 206, mounting bracket 207 and rotating shaft 208 will rotate synchronously. The grafting film will be wrapped around the interface. After the arc ring 701 is adjusted to the positions of both ends of the interface, the grafting film will be cut.

[0057] Then, rotate the rotating handle 802 to drive the bidirectional screw 801 to rotate, and the movable plate 803 slides along the support rod 804 to drive the arc-shaped clamp 805 to fix the top and bottom of the interface.

[0058] When installing or removing the grafting film roll 209, remove the nut 401, remove or install the grafting film roll 209 from the shaft 208, and then reinstall the nut 401.

[0059] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A grafting device for peony trees, comprising a mounting frame (1), characterized in that: The mounting frame (1) is internally rotatably connected to a two-way lead screw (2). A worm gear (201) is fixedly connected to the middle of the two-way lead screw (2). A gear ring (202) is meshed with the tooth end of the worm gear (201). An annular slider (203) is fixedly connected to the top of the gear ring (202). A mounting ring (204) is fixedly connected to one side of the mounting frame (1). An annular groove with an opening facing downwards is opened inside the mounting ring (204). The annular slider (203) is externally connected to the... The wall is slidably connected in the annular groove. The top of the toothed ring (202) is fixedly connected to a support column (205). The bottom of the support column (205) is rotatably connected to a connecting rod (206). One end of the connecting rod (206) is fixedly connected to a mounting bracket (207). The inside of the mounting bracket (207) is rotatably connected to a rotating shaft (208). The outer wall of the rotating shaft (208) is provided with a grafting film roll (209). The top of the support column (205) is equipped with an adjustment component.

2. The peony grafting device for large trees according to claim 1, characterized in that: The adjustment assembly includes a limiting plate (3), one end of which is fixedly connected to the top of the support column (205). An arc groove (301) is provided inside the limiting plate (3). A limiting rod (302) is fixedly connected to the top of one end of the connecting rod (206). The outer wall of the limiting rod (302) is slidably connected in the arc groove (301). A nut (303) is threadedly connected to the outer wall of the limiting rod (302). The bottom of the nut (303) abuts against the top of the limiting plate (3).

3. The peony grafting device for large trees according to claim 1, characterized in that: The bottom of the rotating shaft (208) is fixedly connected to a threaded rod (4), and the outer wall of the threaded rod (4) is threadedly connected to a nut (401).

4. The peony grafting device for large trees according to claim 1, characterized in that: The tooth end of the worm gear (201) is meshed with a worm (5), and the outer walls of both ends of the worm (5) are rotatably connected to the mounting frame (1). A handle (501) is fixedly connected to one side of the worm (5), and a grip (502) is fixedly connected to one side of the handle (501).

5. The peony grafting device for large trees according to claim 1, characterized in that: Both ends of the bidirectional lead screw (2) are rotatably connected to limit blocks (6), and a guide rod (601) is symmetrically fixedly connected to the bottom of one of the limit blocks (6). The mounting frame (1) has symmetrical rod holes inside.

6. The peony grafting device for large trees according to claim 5, characterized in that: One end of each of the two guide rods (601) is slidably connected in the rod hole, and the other end of each of the two guide rods (601) is fixedly connected to the top of the other limiting block (6).

7. The peony grafting device for large trees according to claim 5, characterized in that: Both ends of the two guide rods (601) are slidably connected to moving blocks (7), the middle of the moving blocks (7) is threaded to the outer wall of the bidirectional lead screw (2), and an arc ring (701) is fixedly connected to one side of the moving blocks (7).

8. The peony grafting device for large trees according to claim 7, characterized in that: One end of the arc-shaped ring (701) is symmetrically fixedly connected to a support plate (8), and the two support plates (8) are rotatably connected to opposite sides of a bidirectional screw (801), and one end of the bidirectional screw (801) is fixedly connected to a rotating handle (802).

9. A grafting device for peony trees according to claim 8, characterized in that: The outer wall of the bidirectional screw (801) is symmetrically threaded with movable plates (803), and the two movable plates (803) are slidably connected with support rods (804). The two ends of the support rods (804) are fixedly connected between the two support plates (8), and an arc-shaped clamping plate (805) is fixedly connected to one side of the movable plate (803).

10. A grafting technique for peony onto large trees, characterized by: The grafting device for peony trees according to any one of claims 1-9 comprises the following steps: When in use, the installation ring (204) is fitted onto the outer wall of the large tree rootstock, the nut (303) is loosened, and the limiting rod (302) slides along the arc groove (301), which drives the connecting rod (206), the mounting frame (207) and the grafting film roll (209) to adjust their positions until they contact the outer wall of the interface. The nut (303) is tightened to lock the limiting rod (302). Wrap the free end of the grafting film roll (209) around the outer wall of the scion and rootstock, then rotate the handle (502), and drive the worm gear (5) to rotate through the handle (501), which in turn drives the worm wheel (201) and the double screw (2) to rotate. The moving blocks (7) move towards each other under the guidance of the guide rod (601), which drives the arc ring (701) to move to both ends of the interface. At the same time, the worm gear (201) will drive the gear ring (202) and the annular slider (203) to slide along the annular groove. The support column (205), connecting rod (206), mounting bracket (207) and rotating shaft (208) will rotate synchronously. The grafting film will wrap around the interface. After the arc ring (701) is adjusted to the positions of both ends of the interface, the grafting film will be cut. Then rotate the rotating handle (802) to drive the double screw (801) to rotate, and the movable plate (803) slides along the support rod (804) to drive the arc-shaped clamp (805) to fix the top and bottom of the interface; When installing or removing the grafting film roll (209), remove the nut (401), remove or install the grafting film roll (209) from the shaft (208), and then put the nut (401) back on.

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