Forestry fruit nursery stock transplanting device

Abstract

The invention relates to the related technical field of forestry fruit trees, in particular to a forestry fruit nursery stock transplanting device which comprises a transplanting base, a transplanting cavity is formed in the upper end of the transplanting base, a water storage cavity is formed in the lower side of the transplanting cavity, and a plurality of first positioning clamping blocks are evenly inserted into the upper side of an inner cavity of the transplanting cavity; second positioning clamping blocks communicating with inner cavities of the first positioning clamping blocks are installed between the adjacent first positioning clamping blocks in an inserted mode, a plurality of water outlet holes are formed in the lower ends of the first positioning clamping blocks and the lower ends of the second positioning clamping blocks, first air guide holes are formed in the periphery of the air guide cavity, and second air guide holes are formed in the periphery of the water storage cavity. The other ends of the first air guide hole and the second air guide hole are connected with the output end of an air pump, and a control panel is fixedly mounted on one side of the upper end of the transplanting seat. The forestry fruit nursery stock transplanting device provided by the invention can ensure uniform distribution of moisture in nursery stock soil balls, reduce dry cracks of the soil balls, and achieve the effect of protecting nursery stock roots.

Description

Technical Field

[0001] The invention relates to the technical field related to forestry fruit trees, and in particular to a forestry fruit tree seedling transplanting device. Background Art

[0002] In the process of transplanting forestry fruit tree seedlings, although the existing technology can realize the packaging and transportation of seedlings to a certain extent, there is generally a key defect, that is, the problem of uneven moisture distribution in the soil ball.

[0003] Specifically, when the seedlings are packaged for transportation, due to the effect of gravity and the capillary phenomenon between soil particles, the water in the soil ball will gradually move downward and accumulate at the bottom. This uneven distribution of water will lead to an imbalance in the water supply of different parts of the seedlings' roots, affecting the normal water absorption and nutrient transfer of the roots, thereby reducing the survival rate and growth potential of the seedlings.

[0004] For example, the traditional straw rope, nylon belt or wire winding method can fix the soil ball to a certain extent, but it cannot effectively solve the problem of uneven water distribution. Similarly, the assembled wooden box protection and small seedling root ball baler also have similar shortcomings.

[0005] In addition, although the existing seedling transportation root protection cover can provide a certain moisturizing effect, due to the water movement effect, the water in the cover is deposited on the lower side thereof, making it difficult to maintain a uniform distribution of water inside the soil ball during long-distance transportation.

[0006] Therefore, in view of the defect of uneven moisture distribution in the soil ball in the existing technology, it is urgent to develop a forestry fruit tree seedling transplanting device that can effectively ensure the uniform distribution of moisture inside the soil ball, so as to improve the transplanting survival rate and growth quality of the seedlings. Summary of the invention

[0007] In order to solve the above problems, the present invention provides a forestry fruit tree seedling transplanting device.

[0008] The present invention adopts the following technical scheme: a forestry fruit tree seedling transplanting device, comprising a transplanting seat, a transplanting cavity is provided at the upper end of the transplanting seat, a water storage cavity is provided at the lower side of the transplanting cavity, a plurality of first positioning blocks are evenly inserted and installed on the upper side of the inner cavity of the transplanting cavity, second positioning blocks interconnected with the inner cavities of the adjacent first positioning blocks are inserted and installed between the adjacent first positioning blocks, a plurality of water outlet holes are provided at the lower ends of the first positioning blocks and the second positioning blocks, an infusion pump is fixedly installed in the transplanting seat, an input end of the infusion pump is interconnected with the water storage cavity, an output end of the infusion pump is interconnected with each first positioning block, and each of the first positioning blocks is interconnected with each other. A humidity sensor probe is installed on the periphery of a positioning block, and the lower end of the humidity sensor probe is arranged in the transplant seat. The inner cavity of the transplant cavity is hemispherical, and air bags are evenly fixedly installed on the inner wall of the transplant cavity. An air guide cavity is opened on the periphery of the transplant cavity, and an air guide tube connected with the air guide cavity is fixedly installed in each air bag. An air pump is fixedly installed on the periphery of the transplant seat, a first air guide hole is opened on the periphery of the air guide cavity, and a second air guide hole is opened on the periphery of the water storage cavity. The other ends of the first air guide hole and the second air guide hole are connected to the output end of the air pump, and a control panel is fixedly installed on one side of the upper end of the transplant seat.

[0009] As a further description of the above technical solution: a filter frame threadedly connected to the water storage cavity is provided in the water storage cavity, a filter screen is fixedly installed on the upper end of the filter frame, and a through cavity is opened on the periphery of the filter frame.

[0010] As a further description of the above technical solution: an annular cavity is opened on the outer periphery of the upper side of the transplant cavity, and a first liquid guide tube connected to the annular cavity is fixedly installed on the inner wall of the transplant cavity, the number and position of the first liquid guide tube and the first positioning block correspond to each other, and a second liquid guide tube connected to the first liquid guide tube is fixedly installed on the outer side of the first positioning block.

[0011] As a further description of the above technical solution: a first limiting groove is provided on the upper end of the transplanting seat, a first limiting slider slidably connected to the first limiting groove is fixedly installed on the lower end of the second liquid guiding tube, a rotating ring is rotatably installed on the upper end of the transplanting seat, a second limiting groove is provided on the lower end of the rotating ring, a second limiting groove is fixedly installed on the upper end of the second liquid guiding tube, a second limiting slider slidably connected to the second limiting groove is provided, and each of the second limiting grooves is arranged in an arc shape, a first driving motor is fixedly installed on the outer wall of the transplanting seat, a first driving gear is fixedly installed on the outer end of the first driving motor through its output shaft, and the first driving gear is meshed with the rotating ring.

[0012] As a further description of the above technical solution: a limiting cavity is opened on the periphery of the first positioning block, a threaded rod is inserted and installed in the limiting cavity, the humidity sensor probe is fixedly installed in the threaded rod, and a threaded ring which is threadedly connected to the periphery of the threaded rod is rotatably installed on the upper end of the limiting cavity.

[0013] As a further description of the above technical solution: a plurality of driven gears are rotatably installed on the upper end of the transplanting seat, the number and positions of the driven gears correspond to the threaded rings, and symmetrically arranged tensioning wheels are provided between adjacent driven gears and threaded rings, and the driven gears, the threaded rings and the outer peripheries of the two tensioning wheels are rotatably connected to each other through transmission belts.

[0014] As a further description of the above technical solution: a second driving motor is fixedly installed on the other side of the outer wall of the transplanting seat, a second driving gear is fixedly installed on the outer end of the second driving motor through its output shaft, and the second driving gear is meshed with the driven gear.

[0015] As a further description of the above technical solution: a plurality of limit sleeves are fixedly installed on the upper end of the transplanting seat, and movable sleeves are plugged and installed on both sides of each limit sleeve, and a limit seat is fixedly installed on the outer end of the movable sleeve. The two tensioning wheels are respectively rotatably installed in the limit seats on both sides, and a spring is fixedly installed between the two limit seats, and the spring is arranged in the limit sleeve and the movable sleeve.

[0016] The present invention provides a forestry fruit tree seedling transplanting device through improvement, which has the following improvements and advantages compared with the prior art:

[0017] First, the present invention is provided with a humidity sensor probe, which can monitor the moisture distribution inside the soil ball of the seedlings. The moisture flowing downward from the soil ball can be collected through the water storage cavity. In conjunction with the infusion pump, the moisture can be redirected into the soil ball through the water outlet hole, so that the moisture distribution inside the soil ball is even, the cracking of the soil ball is reduced, and the effect of protecting the roots of the seedlings is achieved.

[0018] Secondly, the present invention is provided with an air bag, which cooperates with the air pump and each first air guide hole. Through the contraction and expansion of each air bag, the soil of the soil ball in the transplanting cavity is loosened, thereby further ensuring the uniform distribution of water inside the soil ball, and through the second air guide hole, the air can be guided into the water storage cavity to achieve the effect of cleaning the soil on the surface of the filter net.

[0019] Third: The present invention can drive each first positioning block and the second positioning block to shrink inward or expand outward through the sliding connection between the second liquid guide tube and the transplanting seat and the rotating ring, and through the plug-in connection between the first positioning block and the second positioning block, so as to fix the seedlings and protect the seedlings during the seedling transplanting process. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further explained below in conjunction with the accompanying drawings and embodiments:

[0021] Figure 1A schematic diagram of the external structure of a transplanting base provided in an embodiment of the present invention;

[0022] Figure 2 A schematic diagram of the internal structure of a transplanting seat and a filter frame provided in an embodiment of the present invention;

[0023] Figure 3 A schematic diagram of the structure of a transplanting base provided in an embodiment of the present invention;

[0024] Figure 4 The embodiment of the present invention provides Figure 3 Schematic diagram of the structure at A in the middle;

[0025] Figure 5 The embodiment of the present invention provides Figure 3 Schematic diagram of the structure at B in the middle;

[0026] Figure 6 A schematic diagram of the external structure of a filter frame provided in an embodiment of the present invention;

[0027] Figure 7 A schematic diagram of the internal split structure of the first positioning block and the rotating ring provided in an embodiment of the present invention;

[0028] Figure 8 A schematic diagram of the internal split structure of the first positioning card block and the probe provided in an embodiment of the present invention;

[0029] Fig. 9 A schematic diagram of the external structure of a rotating ring provided in an embodiment of the present invention;

[0030] Fig.10 A schematic diagram of the external structure of the probe and the driven gear provided in an embodiment of the present invention;

[0031] Fig.11 This is a schematic diagram of the internal split structure of the limiting sleeve and the tensioning wheel provided in an embodiment of the present invention.

[0032] In the figure:

[0033] 1. Transplanting seat; 11. Transplanting chamber; 12. Control panel;

[0034] 2. water storage chamber; 21. filter frame; 211. filter screen; 212. through chamber; 22. infusion pump; 23. annular chamber; 24. water outlet;

[0035] 3. air pump; 31. first air guide hole; 311. air bag; 312. air guide tube; 313. air guide cavity; 32. second air guide hole;

[0036] 4. First positioning block; 41. Second positioning block; 42. First liquid guide tube; 43. Second liquid guide tube; 44. First limit slider; 45. First limit slide groove; 46. Second limit slider; 47. Rotating ring; 48. Second limit slide groove; 49. First drive motor; 491. First drive gear;

[0037] 5. Threaded rod; 50. Limiting cavity; 51. Humidity sensor probe; 53. Threaded ring; 54. Second drive motor; 55. Second drive gear; 57. Driven gear; 58. Tensioning wheel; 581. Limiting sleeve; 582. Movable sleeve; 583. Limiting seat; 584. Spring. DETAILED DESCRIPTION

[0038] In order to make the technical means, creative features, objectives and effects of the present invention easy to understand, the present invention is further described below with reference to specific diagrams. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other without conflict.

[0039] See also Figure 1 - Fig.11 The embodiment of the present invention provides a technical solution: a forestry fruit tree seedling transplanting device, comprising a transplanting seat 1, a transplanting cavity 11 is provided at the upper end of the transplanting seat 1, a water storage cavity 2 is provided at the lower side of the transplanting cavity 11, a plurality of first positioning blocks 4 are evenly inserted and installed on the upper side of the inner cavity of the transplanting cavity 11, and second positioning blocks 41 interconnected with the inner cavity thereof are inserted and installed between adjacent first positioning blocks 4, a plurality of water outlet holes 24 are provided at the lower ends of the first positioning blocks 4 and the second positioning blocks 41, an infusion pump 22 is fixedly installed in the transplanting seat 1, an input end of the infusion pump 22 is interconnected with the water storage cavity 2, an output end of the infusion pump 22 is interconnected with each first positioning block 4, and each first positioning block 4 is connected to each other. Humidity sensor probes 51 are installed on the periphery, and the lower end of the humidity sensor probes 51 is arranged in the transplanting seat 1. The inner cavity of the transplanting cavity 11 is hemispherical, and the air bags 311 are evenly fixedly installed on the inner wall of the transplanting cavity 11. An air guide cavity 313 is opened on the periphery of the transplanting cavity 11, and an air guide tube 312 connected with the air guide cavity 313 is fixedly installed in each air bag 311. An air pump 3 is fixedly installed on the periphery of the transplanting seat 1, a first air guide hole 31 is opened on the periphery of the air guide cavity 313, and a second air guide hole 32 is opened on the periphery of the water storage cavity 2. The other ends of the first air guide hole 31 and the second air guide hole 32 are connected to the output end of the air pump 3, and a control panel 12 is fixedly installed on one side of the upper end of the transplanting seat 1.

[0040] Working principle: When in use, the seedling soil ball is placed in the transplanting cavity 11, and the seedling can be fixed by the contact effect between each first positioning block 4 and the second positioning block 41 and the stem of the seedling, and then each humidity sensor probe 51 is inserted downward into the soil ball. Through each humidity sensor probe 51, the humidity at various places inside the soil ball can be monitored to achieve the effect of monitoring the moisture distribution of the soil ball. A control panel 12 is set to receive the monitoring information of the humidity sensor probe 51 and control electrical equipment such as valves at the first air guide hole 31 and the second air guide hole 32;

[0041] When the seedlings are transplanted and transported through the transplanting seat 1, the water inside the seedling soil ball will flow downward into the water storage chamber 2. When the water inside the soil ball is uneven, the infusion pump 22 is started to guide the water inside the water storage chamber 2 to the first positioning block 4 and the second positioning block 41. With the help of the water outlet 24, the water can be redirected into the soil ball, thereby ensuring that the water inside the soil ball is evenly distributed, reducing the cracking of the soil ball, and achieving the effect of protecting the roots of the seedlings;

[0042] An air pump 3 is provided to control the valves at each first air guide hole 31 and cooperate with the air guide cavity 313 to drive the corresponding air bag 311 to contract or expand. Through the contact effect between the air bag 311 and the soil ball, the soil of the soil ball can be loosened to ensure smooth flow of water, thereby further ensuring uniform distribution of water. When the air bags 311 expand at the same time, the soil ball can be positioned to improve the efficiency of disassembly of seedlings.

[0043] Specifically, a filter frame 21 threadably connected to the water storage chamber 2 is disposed in the water storage chamber 2 , a filter screen 211 is fixedly mounted on the upper end of the filter frame 21 , and a through cavity 212 is provided on the periphery of the filter frame 21 .

[0044] In another embodiment provided by the present invention, a filter frame 21 threadedly connected to the water storage chamber 2 is provided in the water storage chamber 2 , a filter screen 211 is fixedly mounted on the upper end of the filter frame 21 , and a through cavity 212 is opened on the periphery of the filter frame 21 .

[0045] Specifically, by removing the filter frame 21, the soil and other impurities in the water storage chamber 2 and the transplanting chamber 11 can be recovered. The filter frame 21 is set to block the soil and other impurities when the water in the soil ball flows into the water storage chamber 2.

[0046] By controlling the valve at the second air guide hole 32 and cooperating with the air pump 3, the external expansion can be guided into the water storage chamber 2, and the soil on the upper end of the filter frame 21 can be blown upward, thereby ensuring the water circulation.

[0047] In another embodiment provided by the present invention, an annular cavity 23 is provided on the upper periphery of the transplanting cavity 11, and a first liquid guide tube 42 which is interconnected with the annular cavity 23 is fixedly installed on the inner wall of the transplanting cavity 11, and the number and position of the first liquid guide tube 42 and the first positioning block 4 correspond to each other, and a second liquid guide tube 43 which is plugged into the first liquid guide tube 42 is fixedly installed on the outer side of the first positioning block 4; a first limiting slide groove 45 is provided on the upper end of the transplanting seat 1, and a first liquid guide tube 43 which is slidably connected with the first limiting slide groove 45 is fixedly installed on the lower end of the second liquid guide tube 43 A limiting slider 44, a rotating ring 47 is rotatably installed on the upper end of the transplanting seat 1, a second limiting slide groove 48 is opened at the lower end of the rotating ring 47, a second limiting slider 46 slidably connected to the second limiting slide groove 48 is fixedly installed on the upper end of the second liquid guiding tube 43, and each second limiting slide groove 48 is arranged in an arc shape, a first driving motor 49 is fixedly installed on the outer wall of the transplanting seat 1, and a first driving gear 491 is fixedly installed on the outer end of the first driving motor 49 through its output shaft, and the first driving gear 491 is meshed with the rotating ring 47.

[0048] Specifically, when the seedlings are installed and positioned, the first driving motor 49 is started through the control panel 12, and the rotating ring 47 can be driven to rotate through the meshing connection between its output shaft and the first driving gear 491 and the rotating ring 47. In the transplanting chamber 11, the sliding connection between the first limiting slide groove 45 and the first limiting slider 44 limits the movement direction of each first positioning block 4, so that the rotating rotating ring 47 can drive each first positioning block 4 to retract inwardly through the sliding connection between the second limiting slider 46 and the arc-shaped second limiting slide groove 48, and due to the plug-in connection between the second positioning block 41 and the first positioning blocks 4 on the adjacent two sides, the second positioning block 41 can be driven to retract inwardly with the first positioning block 4 until it contacts the periphery of the stem of the seedling, thereby achieving the effect of positioning the seedling;

[0049] By plugging the first liquid guide tube 42 and the second liquid guide tube 43, the annular cavity 23 and the first positioning block 4 can be connected to each other, so that the water can be guided into the first positioning block 4, and in combination with the water outlet hole 24, the water can be redirected into the soil ball.

[0050] In another embodiment provided by the present invention, a limiting insertion cavity 50 is provided on the periphery of the first positioning block 4, a threaded rod 5 is inserted and installed in the limiting insertion cavity 50, a humidity sensor probe 51 is fixedly installed in the threaded rod 5, and a threaded ring 53 threadedly connected to the periphery of the threaded rod 5 is rotatably installed on the upper end of the limiting insertion cavity 50; a plurality of driven gears 57 are rotatably installed on the upper end of the transplanting seat 1, the number and position of the driven gears 57 correspond to the threaded ring 53, and tensioning wheels 58 symmetrically arranged are provided between adjacent driven gears 57 and the threaded ring 53, and the peripheries of the driven gears 57, the threaded ring 53 and the two tensioning wheels 58 are rotatably connected to each other through transmission belts; A second driving motor 54 is fixedly installed on the other side of the outer wall of the transplanting seat 1, and a second driving gear 55 is fixedly installed on the outer end of the second driving motor 54 through its output shaft, and the second driving gear 55 is meshed with the driven gear 57; a plurality of limiting sleeves 581 are fixedly installed on the upper end of the transplanting seat 1, and movable sleeves 582 are inserted and installed on both sides of each limiting sleeve 581, and a limiting seat 583 is fixedly installed on the outer end of the movable sleeve 582. Two tensioning wheels 58 are rotatably installed in the limiting seats 583 on both sides, and a spring 584 is fixedly installed between the two limiting seats 583, and the spring 584 is arranged in the limiting sleeve 581 and the movable sleeve 582.

[0051] Specifically, when the rotating ring 47 drives the first positioning block 4 to contract or expand, the moving first positioning block 4 can drive the threaded ring 53 to move with it, and cooperate with the spring 584, so that the transmission belt is always in contact with the driven gear 57, the threaded ring 53 and the outer periphery of the two tension wheels 58;

[0052] Start the second drive motor 54, and through the meshing connection between its output shaft and the second drive gear 55 and the driven gear 57, it can drive the driven gear 57 to move, and then drive the threaded ring 53 to move. Under the condition that the movement direction of the threaded rod 5 is restricted by the plug-in connection between the limiting plug cavity 50 and the threaded rod 5, the rotating threaded ring 53 can drive the humidity sensor probe 51 to move up and down in the soil ball through the threaded connection between the limit plug cavity 50 and the threaded rod 5, so as to achieve the effect of adjusting its monitoring position.

[0053] The basic principles, main features and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and the description in the specification are only to illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A forestry fruit tree seedling transplanting device, comprising a transplanting seat (1), characterized in that: The transplanting seat (1) has a transplanting cavity (11) at its upper end, a water storage cavity (2) at its lower side, a plurality of first positioning blocks (4) are evenly inserted and installed on the upper side of the inner cavity of the transplanting cavity (11), a second positioning block (41) interconnected with the inner cavity of the first positioning block (4) is inserted and installed between adjacent first positioning blocks (4), a plurality of water outlet holes (24) are provided at the lower ends of the first positioning blocks (4) and the second positioning blocks (41), an infusion pump (22) is fixedly installed in the transplanting seat (1), an input end of the infusion pump (22) is interconnected with the water storage cavity (2), an output end of the infusion pump (22) is interconnected with each first positioning block (4), a humidity sensor probe (51) is inserted and installed on the periphery of each first positioning block (4), and the humidity sensor probe (51) is provided on the outer periphery of each first positioning block (4). The lower end of the temperature sensor probe (51) is arranged in the transplanting seat (1); the inner cavity of the transplanting cavity (11) is hemispherical, and the inner wall of the transplanting cavity (11) is evenly fixedly installed with air bags (311); the periphery of the transplanting cavity (11) is provided with an air guide cavity (313); each of the air bags (311) is fixedly installed with an air guide tube (312) interconnected with the air guide cavity (313); the periphery of the transplanting seat (1) is provided with a first air guide hole (31); the periphery of the air guide cavity (313) is provided with a second air guide hole (32); the other ends of the first air guide hole (31) and the second air guide hole (32) are connected to the output end of the air pump (3); and a control panel (12) is fixedly installed on one side of the upper end of the transplanting seat (1).

2. A forestry fruit tree seedling transplanting device according to claim 1, characterized in that: A filter frame (21) threadably connected thereto is provided in the water storage chamber (2), a filter screen (211) is fixedly mounted on the upper end of the filter frame (21), and a through cavity (212) is provided on the periphery of the filter frame (21).

3. A forestry fruit tree seedling transplanting device according to claim 1, characterized in that: An annular cavity (23) is provided on the periphery of the upper side of the transplant cavity (11); a first liquid guide tube (42) in communication with the annular cavity (23) is fixedly installed on the inner wall of the transplant cavity (11); the number and position of the first liquid guide tube (42) and the first positioning block (4) correspond to each other; and a second liquid guide tube (43) plugged into the first liquid guide tube (42) is fixedly installed on the outer side of the first positioning block (4).

4. A forestry fruit tree seedling transplanting device according to claim 3, characterized in that: The upper end of the transplanting seat (1) is provided with a first limiting slide groove (45), the lower end of the second liquid guiding tube (43) is fixedly provided with a first limiting slider (44) which is slidably connected to the first limiting slide groove (45), the upper end of the transplanting seat (1) is rotatably provided with a rotating ring (47), the lower end of the rotating ring (47) is provided with a second limiting slide groove (48), the upper end of the second liquid guiding tube (43) is fixedly provided with a second limiting slider (46) which is slidably connected to the second limiting slide groove (48), and each of the second limiting slide grooves (48) is arranged in an arc shape, the outer wall of the transplanting seat (1) is fixedly provided with a first driving motor (49), the outer end of the first driving motor (49) is fixedly provided with a first driving gear (491) through its output shaft, and the first driving gear (491) is meshedly connected with the rotating ring (47).

5. A forestry fruit tree seedling transplanting device according to claim 4, characterized in that: A limit cavity (50) is provided on the periphery of the first positioning block (4), a threaded rod (5) is inserted and installed in the limit cavity (50), the humidity sensor probe (51) is fixedly installed in the threaded rod (5), and a threaded ring (53) threadably connected to the periphery of the threaded rod (5) is rotatably installed on the upper end of the limit cavity (50).

6. A forestry fruit tree seedling transplanting device according to claim 5, characterized in that: A plurality of driven gears (57) are rotatably mounted on the upper end of the transplanting seat (1); the number and position of the driven gears (57) correspond to the threaded ring (53); and tension wheels (58) are symmetrically arranged between adjacent driven gears (57) and threaded rings (53); and the driven gears (57), the threaded ring (53) and the two tension wheels (58) are rotatably connected to each other via a transmission belt.

7. A forestry fruit tree seedling transplanting device according to claim 6, characterized in that: A second drive motor (54) is fixedly mounted on the other side of the outer wall of the transplanting seat (1); a second drive gear (55) is fixedly mounted on the outer end of the second drive motor (54) via its output shaft; the second drive gear (55) is meshedly connected with a driven gear (57).

8. A forestry fruit tree seedling transplanting device according to claim 7, characterized in that: A plurality of limiting sleeves (581) are fixedly mounted on the upper end of the transplanting seat (1), and movable sleeves (582) are inserted and mounted on both sides of each limiting sleeve (581). A limiting seat (583) is fixedly mounted on the outer end of the movable sleeve (582), and the two tensioning wheels (58) are rotatably mounted in the limiting seats (583) on both sides respectively, and a spring (584) is fixedly mounted between the two limiting seats (583), and the spring (584) is arranged in the limiting sleeve (581) and the movable sleeve (582).

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