Limiting soil pressing mechanism, planting shovel assembly and sea grass planting machine

By designing a limit soil pressing mechanism, using elastic soil pressing parts and limiting parts to limit the insertion depth of the planting shovel and compacting the soil, the problems of inconsistent depth of seaweed planting and bare roots are solved, and the quality and survival rate of seaweed planting are improved.

CN222786357UActive Publication Date: 2025-04-25TANGSHAN OCEAN RANCH IND CO LTD
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Patent Information

Application Number
CN202421602899.X
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-07-08
Publication Date
2025-04-25
Estimated Expiration
2034-07-08

AI Technical Summary

Technical Problem

Inconsistent depth of seaweed planting and bare seaweed seedlings' roots lead to low survival rate of seaweed planting.

Method used

A limiting soil pressing mechanism is designed, including a mounting base, an elastic soil pressing member and a limiting member. It contacts the underwater ground through the elastic soil pressing member and slides upward to the limiting member to abut the limiting member, limiting the insertion depth of the planting shovel, and using the elastic soil pressing member to compact the soil when pulled out.

Benefits of technology

It improves the consistency of seaweed planting depth, avoids the problem of sticking away the soil when the planting shovel is pulled out, and improves the quality and survival rate of seaweed planting.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model provides a limiting and soil pressing mechanism, a planting shovel assembly and sea grass planting machinery, and the limiting and soil pressing mechanism is used for limiting the depth of a shovel body of a planting shovel inserted into the underwater ground, and is also used for compacting shoveled soil when the shovel body is pulled out of the underwater ground. The limiting soil pressing mechanism comprises a mounting seat connected to the planting shovel, and an elastic soil pressing part and a limiting part which are connected to the lower part of the mounting seat; the elastic soil pressing part is vertically slidably connected to the mounting base and located on the side of the shovel body. The limiting part is vertically connected to the mounting base, and the lower end of the limiting part extends between the elastic soil pressing part and the mounting base. When the planting shovel is inserted into the underwater ground, the elastic soil pressing piece abuts against the underwater ground and slides upwards to abut against the lower end of the limiting piece. When the planting shovel is pulled out of the underwater ground, the elastic soil pressing piece slides downwards to be separated from the limiting piece based on the elastic acting force. According to the limiting soil pressing mechanism provided by the utility model, the sea grass planting depth consistency and the sea grass planting survival rate are improved.
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Description

Technical Field

[0001] The utility model belongs to the technical field of seaweed sowing and seedling planting equipment, and specifically relates to a limiting soil pressing mechanism, a planting shovel assembly and a seaweed planting machine. Background Art

[0002] Seaweed plays a very important role in the marine ecological environment. It is usually planted in shallow coastal areas. The planting methods include direct sowing and seedling transplanting. At present, seaweed planting, whether sowing or planting seedlings, usually relies on manual labor. Therefore, it can only be carried out when the shallow coastal planting area is exposed to the ground at low tide. The planting time is very limited. Therefore, the company is currently focusing on developing mechanical equipment that can perform efficient planting operations without being affected by shallow coastal waters.

[0003] At present, for mechanized seaweed planting operations, a planting shovel with a long tube structure is usually used to transport and plant seaweed seeds or seaweed seedlings. Due to the uneven underwater ground, the depth of the planting shovel inserted into the underwater ground is inconsistent, which leads to the problem of consistency of the seaweed planting depth. At the same time, considering that the roots of the seaweed seeds or seaweed seedlings fall into the planting pits dug by the planting shovel, the soil will be adhered to the planting shovel during the process of pulling the planting shovel upward, resulting in the problem of the roots of the seaweed seeds or seaweed seedlings being exposed, which can easily lead to the seaweed seeds or seaweed seedlings being washed away by the water after planting, which in turn leads to the problem of low seaweed planting survival rate. Utility Model Content

[0004] The embodiment of the utility model provides a position-limiting soil-pressing mechanism, which aims to improve the consistency of seaweed planting depth and the planting quality.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: first, a limiting soil pressing mechanism is provided, which is used to limit the depth of the shovel body of the planting shovel inserted into the underwater ground, and is also used to compact the shoveled soil when the shovel body is pulled out of the underwater ground. The limiting soil pressing mechanism includes a mounting seat connected to the planting shovel, an elastic soil pressing piece connected below the mounting seat, and a limiting piece; the elastic soil pressing piece is connected to the mounting seat for vertical sliding connection and is located on the side of the shovel body, and the limiting piece is vertically connected to the mounting seat and the lower end extends to between the elastic soil pressing piece and the mounting seat; wherein, when the planting shovel is inserted into the underwater ground, the elastic soil pressing piece abuts the underwater ground and slides upward until it abuts against the lower end of the limiting piece; when the planting shovel is pulled out of the underwater ground, the elastic soil pressing piece slides down and separates from the limiting piece based on the elastic force.

[0006] In combination with the first aspect, in a possible implementation, the elastic soil pressing member includes a soil pressing plate located below the mounting seat, a plurality of sliding rods spaced apart on the soil pressing plate, and a plurality of elastic elements respectively mounted on the sliding rods; wherein each sliding rod passes upward through the mounting seat and is screwed to a first nut, and both ends of the elastic element are respectively abutted against the mounting seat and the soil pressing plate.

[0007] In some embodiments, a plurality of first water-permeable holes are spaced apart on the soil pressure plate.

[0008] Exemplarily, the limiting member includes at least one limiting rod vertically penetrated through the mounting seat, and the lower end of the limiting rod is located between the mounting seat and the soil pressing plate.

[0009] For example, the limiting rod is threadedly connected to the mounting seat, and a second nut is threadedly connected to the limiting rod, and the second nut is vertically abutted against the mounting seat.

[0010] In some embodiments, a limiting plate is provided at the lower end of the limiting rod, and the limiting plate is used to abut against the upper plate surface of the soil pressing plate.

[0011] In combination with the first aspect, in a possible implementation, the mounting seat includes a hoop connected to the planting shovel and a connecting plate connected to the hoop; wherein the elastic soil pressing member and the limiting member are both connected to the connecting plate.

[0012] Exemplarily, the hoop is an open ring, and the two ends of the hoop are bent outward to form connecting ears, and the two connecting ears are connected by at least one fastener; the connecting plate is an open ring, and a plurality of second water-permeable holes are distributed on the connecting plate, and the two ends of the connecting plate are respectively connected to the two connecting ears.

[0013] The beneficial effect of the position-limiting soil-pressing mechanism provided by the utility model is that, compared with the prior art, the position-limiting soil-pressing mechanism of the utility model can limit the upward sliding limit position of the elastic soil-pressing member by abutting the elastic soil-pressing member with the position-limiting member, so that the elastic soil-pressing member abutting against the underwater ground limits the depth of the planting shovel inserted into the underwater ground, thereby improving the consistency of the seaweed planting depth; in the process of pulling the planting shovel out of the underwater ground, the elastic soil-pressing member can maintain elastic pressure with the underwater ground under the action of its own elastic force, thereby preventing the planting shovel from sticking to and taking away the soil, ensuring that the soil covering the roots of the seaweed seeds or seaweed seedlings is substantial, thereby improving the quality of seaweed planting, preventing the seaweed seeds or seaweed seedlings from being washed away by sea water, and thereby improving the survival rate of seaweed planting.

[0014] In a second aspect, an embodiment of the utility model further provides a planting shovel assembly, including the above-mentioned limiting soil pressing mechanism.

[0015] Compared with the prior art, the planting shovel assembly provided by the embodiment of the utility model adopts the above-mentioned limiting soil pressing mechanism, which can improve the consistency of seaweed planting depth; avoid the planting shovel sticking to and carrying away soil in the process of pulling it out of the underwater ground, improve the quality of seaweed planting, and then improve the survival rate of seaweed planting.

[0016] In a third aspect, an embodiment of the utility model further provides a seaweed planting machine, including the above-mentioned planting shovel assembly.

[0017] Compared with the prior art, the seaweed planting machine provided by the embodiment of the utility model adopts the above-mentioned planting shovel assembly, which can improve the consistency of seaweed planting depth; avoid the planting shovel sticking to and carrying away soil in the process of pulling it out of the underwater ground, improve the quality of seaweed planting, and then improve the survival rate of seaweed planting. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of a three-dimensional structure in which a position-limiting soil-pressing mechanism provided in an embodiment of the utility model is installed on a planting shovel;

[0019] Figure 2 A schematic diagram of the three-dimensional structure of the position-limiting soil-pressing mechanism provided in an embodiment of the utility model.

[0020] In the figure: 10, planting shovel; 20, mounting seat; 21, hoop; 211, connecting ear; 22, connecting plate; 221, second water permeable hole; 23, fastener; 30, elastic soil pressing member; 31, soil pressing plate; 311, first water permeable hole; 32, sliding rod; 321, first nut; 33, elastic element; 40, limiting member; 41, limiting rod; 42, second nut; 43, limiting plate. DETAILED DESCRIPTION

[0021] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0022] It should be noted that when an element is referred to as being "disposed on" or "connected to" another element, it may be directly on the other element or indirectly on the other element. It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "height", "upper", "lower", "front", "back", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. The terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, the meanings of "multiple" and "several" are two or more, unless otherwise clearly and specifically defined.

[0023] Please also read Figure 1 and Figure 2 , the position-limiting soil-pressing mechanism provided by the utility model is now described. The position-limiting soil-pressing mechanism is used to limit the depth of the shovel body of the planting shovel 10 inserted into the underwater ground, and is also used to compact the shoveled soil when the shovel body is pulled out of the underwater ground. The position-limiting soil-pressing mechanism includes a mounting seat 20 connected to the planting shovel 10, an elastic soil-pressing member 30 connected below the mounting seat 20, and a position-limiting member 40; the elastic soil-pressing member 30 is connected to the mounting seat 20 by sliding up and down and is located on the side of the shovel body, and the position-limiting member 40 is vertically connected to the mounting seat 20 and the lower end extends between the elastic soil-pressing member 30 and the mounting seat 20; wherein, when the planting shovel 10 is inserted into the underwater ground, the elastic soil-pressing member 30 abuts against the underwater ground and slides upwards until it abuts against the lower end of the position-limiting member 40; when the planting shovel 10 is pulled out of the underwater ground, the elastic soil-pressing member 30 slides down to separate from the position-limiting member 40 based on the elastic force.

[0024] It should be noted that the planting shovel 10 in this embodiment can be installed on a seaweed planting machine for mechanized seaweed planting operations, or can be manually held to carry out seaweed planting operations. It should be understood that, whether it is sowing or planting seedlings, in order to resist the scouring force of seawater, the roots of seaweed seeds and seaweed seedlings need to be tied with a gravity ball. On the one hand, the gravity of the gravity ball is used to prevent the seaweed seeds or seaweed seedlings from being separated from the underwater ground due to the buoyancy of seawater, and on the other hand, the falling force of the gravity ball can be used to make the seaweed seeds or seaweed seedlings sink into the water during sowing or planting.

[0025] It should be understood that, whether it is seaweed sowing or planting seedlings, for manual operation, the roots of the seaweed seeds or seaweed seedlings can be manually covered with soil after being implanted in the planting pits. For mechanized operations, since the operator cannot directly approach the planting pits, he can only rely on the free fall of the soil turned up by the planting shovel 10. At the same time, the underwater soil is very sticky and is easy to stick to the planting shovel 10. Therefore, it is easy for the roots of the seaweed seeds or seaweed seedlings to be covered with less and loose soil, which is easy to be washed away by sea water. Therefore, in this embodiment, the elastic soil pressing member 30 is used to press the soil scooped up by the planting shovel 10, so as to avoid the problem of exposed roots of the seaweed seeds or seaweed seedlings or loose planting.

[0026] When sowing seaweed, the shovel body of the planting shovel 10 is inserted downward into the underwater ground. During the insertion process, the elastic soil pressing member 30 presses against the underwater ground and slides upward. When the elastic soil pressing member 30 abuts against the lower end of the limiting member 40, the elastic soil pressing member 30 cannot continue to slide upward, so the planting shovel 10 is maintained at the current insertion depth and a planting pit is formed (the planting pit can be formed by swinging the planting shovel 10 with a flat shovel body to flip the soil to the side, or by opening the two semi-conical shovel bodies that can be opened and closed to flip the soil to the side). Then, the seaweed seeds or seaweed seedlings are placed in the planting pit through the planting shovel 10 and the seedlings can be pulled upward. The planting shovel 10 is pulled out, during which the elastic soil pressing member 30 maintains a state of pressing against the underwater ground based on its own elastic force, until the shovel body of the planting shovel 10 is completely or nearly completely pulled out of the underwater ground, at which time the elastic soil pressing member 30 slides down to the limit position relative to the planting shovel 10, and is thereby lifted up together with the planting shovel 10. Thus, the planting shovel 10 utilizes the abutment effect of the limiting member 40 on the elastic pressing member to ensure that the planting depth of each seaweed is consistent, and at the same time, utilizes the delayed lifting of the elastic soil pressing member 30 relative to the planting shovel 10 to compact the soil during the pulling out process of the planting shovel 10, thereby improving the seaweed planting quality.

[0027] Compared with the prior art, the limiting soil pressing mechanism provided in the present embodiment can limit the upward sliding limit position of the elastic soil pressing piece 30 by abutting the limiting piece 40 against the elastic soil pressing piece 30, so that the elastic soil pressing piece 30 abutting against the underwater ground limits the depth of the planting shovel 10 inserted into the underwater ground, thereby improving the consistency of the seaweed planting depth; in the process of pulling the planting shovel 10 out of the underwater ground, the elastic soil pressing piece 30 can maintain elastic pressure against the underwater ground under the action of its own elastic force, thereby preventing the planting shovel 10 from sticking to and taking away the soil, ensuring that the soil covering the roots of the seaweed seeds or seaweed seedlings is substantial, thereby improving the quality of seaweed planting, preventing the seaweed seeds or seaweed seedlings from being washed away by sea water, and thereby improving the survival rate of seaweed planting.

[0028] In some embodiments, see Figure 2The elastic soil-pressing member 30 includes a soil-pressing plate 31 located below the mounting seat 20, a plurality of sliding rods 32 spaced apart on the soil-pressing plate 31, and a plurality of elastic elements 33 respectively sleeved on each sliding rod 32; wherein each sliding rod 32 passes upward through the mounting seat 20 and is screwed to a first nut 321, and both ends of the elastic element 33 are respectively in contact with the mounting seat 20 and the soil-pressing plate 31.

[0029] Here, the soil pressing plate 31 can be annular or semi-annular in shape and arranged around the shovel body of the planting shovel 10. Considering that the planting shovel 10 is inserted into the soil on one side of the underwater ground position to turn up the soil when forming a planting pit, it is preferred to use a semi-annular soil pressing plate 31 arranged on the soil turning up side. This can not only ensure the soil pressing effect, but also reduce the resistance of seawater on the soil pressing plate 31, thereby improving the ease of the planting shovel 10 in moving up and down for planting operations.

[0030] By screwing the first nut 321, the distance between the soil pressing plate 31 and the mounting seat 20 can be adjusted, thereby changing the pressing stroke of the soil pressing plate 31 on the underwater ground during the process of pulling the planting shovel 10 out of the underwater ground. For example, the pressing stroke can be adjusted to a small value due to the shallow depth of seaweed sowing, while the pressing stroke should be adjusted to a large value due to the great depth of seaweed seedling planting.

[0031] The elastic element 33 can specifically be a spring. When the planting shovel 10 is inserted into the underwater ground, the elastic element 33 is compressed until the soil pressing plate 31 abuts against the lower end of the slide rod 32. When the planting shovel 10 is pulled out of the underwater ground, the soil pressing plate 31 slides downward relative to the planting shovel 10 under the elastic force of the elastic element 33, thereby maintaining the pressure state against the underwater ground, thereby ensuring that the turned-up soil can cover the roots of the seaweed seeds or seaweed seedlings again.

[0032] It should be noted that if Figure 2 As shown, in this embodiment, a plurality of first water holes 311 are spaced apart on the soil pressing plate 31. The first water holes 311 can reduce the resistance of seawater on the soil pressing plate 31 on the one hand, and can prevent the soil pressing plate 31 from pressing against the slippery underwater ground and forming a closed negative pressure cavity under the soil pressing plate 31 on the other hand, so that the soil is lifted up again when the soil pressing plate 31 is lifted, thereby ensuring the soil pressing effect and improving the quality of seaweed planting.

[0033] Specifically, see Figure 1 and Figure 2In this embodiment, the limiting member 40 includes at least one limiting rod 41 vertically penetrated on the mounting seat 20, and the lower end of the limiting rod 41 is located between the mounting seat 20 and the soil pressing plate 31. Considering the limiting stability, two or more limiting rods 41 can be preferably used here, and the limiting rods 41 are used to abut and limit the upper sliding limit position of the soil pressing plate 31, so that the soil pressing plate 31 cooperates with the limiting rods 41 to achieve the dual functions of soil pressing and controlling the planting depth, and the structure is simple and compact.

[0034] For some possible implementations, see Figure 2 , the limit rod 41 is screwed with the mounting seat 20, and a second nut 42 is screwed on the limit rod 41, and the second nut 42 abuts against the mounting seat 20 up and down. It should be understood here that the seaweed sowing depth is shallower than the seedling planting depth, so the limit rod 41 and the mounting seat 20 are screwed together to achieve the adjustment of the upper sliding limit position of the soil pressing plate 31. Specifically, the limit rod 41 can be a screw rod. After loosening the second nut 42, the limit rod 41 can be screwed to adjust the distance between the lower end of the limit rod 41 and the soil pressing plate 31, thereby adjusting the upper sliding limit position of the soil pressing plate 31, and then achieving the adjustment of the planting depth, so that the planting shovel 10 has two operation modes of sowing and planting seedlings. After the limit rod 41 is adjusted into place, the second nut 42 is re-tightened, so that the limit rod 41 is locked by the abutment of the second nut 42 with the mounting seat 20 to prevent the limit rod 41 from loosening.

[0035] In order to improve the contact stability of the limiting rod 41 with the soil pressing plate 31, and thus improve the stability of the planting operation, as Figure 2 As shown, a limit plate 43 is provided at the lower end of the limit rod 41, and the limit plate 43 is used to abut against the upper plate surface of the soil pressing plate 31. By setting the limit plate 43 to abut against the soil pressing plate 31, the contact area with the soil pressing plate 31 can be increased, thereby improving the force balance of the soil pressing plate 31, and further improving the upward sliding limit stability of the limit rod 41 on the soil pressing plate 31.

[0036] For some possible implementations, see Figure 1 and Figure 2 The mounting seat 20 includes a hoop 21 connected to the planting shovel 10 and a connecting plate 22 connected to the hoop 21 ; wherein the elastic soil pressing member 30 and the limiting member 40 are both connected to the connecting plate 22 .

[0037] By arranging a connecting plate 22 on the hoop 21, it is convenient to drill holes on the connecting plate 22 to install the elastic soil pressing piece 30 and the limiting piece 40. The structure is simple and reliable. At the same time, the hoop 21 is connected with the planting shovel 10 in a sleeve manner, so that its connection position can be adjusted up and down after the hoop 21 is loosened, thereby driving the elastic soil pressing piece 30 and the limiting piece 40 to adjust the height as a whole, thereby meeting the needs of adjusting the planting depth of seaweed during sowing operations and seedling planting operations.

[0038] For an example, see Figure 2 The hoop 21 is an open ring, and the two ends of the hoop 21 are bent outward to form connecting ears 211, and the two connecting ears 211 are connected by at least one fastener 23; the connecting plate 22 is an open ring, and a plurality of second water-permeable holes 221 are distributed on the connecting plate 22, and the two ends of the connecting plate 22 are respectively connected to the two connecting ears 211.

[0039] The end of the hoop 21, the connecting ear 211 and the end of the connecting plate 22 are connected to form a corner structure, thereby improving the overall structural rigidity and reliability, and avoiding the problem of connection failure between the connecting plate 22 and the hoop 21 due to frequent impact force during the planting operation; the relative position of the hoop 21 on the planting shovel 10 can be adjusted up and down by loosening the fastener 23, and the fastener 23 can be re-fixed after adjustment. The second water permeable hole 221 is set on the connecting plate 22 to reduce the resistance of seawater on the connecting plate 22, thereby improving the ease of the planting shovel 10 to move up and down in the seawater.

[0040] Specifically, in order to improve the clamping force and connection reliability of the hoop 21 on the planting shovel 10, two fasteners 23 can be arranged at intervals up and down. The fastener 23 can be a combination of a bolt and a nut. The bolt passes through the two connecting ears 211 in turn and then connects to the nut. The two connecting ears 211 are brought close to each other by tightening the nut, thereby forming a clamping connection for the planting shovel 10. Not only is the connection stable and reliable, but it is also convenient to adjust its connection position.

[0041] Based on the same inventive concept, Figure 1 and Figure 2 It is understood that the embodiment of the present application also provides a seed shovel assembly, including the above-mentioned limiting soil pressing mechanism.

[0042] Compared with the prior art, the planting shovel assembly provided in this embodiment adopts the above-mentioned limiting soil pressing mechanism, which can improve the consistency of seaweed planting depth; avoid the planting shovel 10 sticking to and carrying away the soil during the process of being pulled out of the underwater ground, improve the quality of seaweed planting, and then improve the survival rate of seaweed planting.

[0043] Based on the same inventive concept, an embodiment of the present application also provides a seaweed planting machine, including the above-mentioned planting shovel assembly.

[0044] Compared with the prior art, the seaweed planting machine provided in this embodiment adopts the above-mentioned planting shovel assembly, which can improve the consistency of seaweed planting depth; avoid the planting shovel 10 sticking to and carrying away the soil during the process of pulling it out of the underwater ground, improve the quality of seaweed planting, and then improve the survival rate of seaweed planting.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. The limited soil pressing mechanism is characterized by: The limit soil pressing mechanism is used to limit the depth of the shovel body of the planting shovel inserted into the underwater ground, and is also used to compact the shoveled soil when the shovel body is pulled out of the underwater ground. The limit soil pressing mechanism includes a mounting seat connected to the planting shovel, an elastic soil pressing piece connected below the mounting seat, and a limiting piece; the elastic soil pressing piece is connected to the mounting seat for vertical sliding connection and is located on the side of the shovel body, and the limiting piece is vertically connected to the mounting seat and the lower end extends to between the elastic soil pressing piece and the mounting seat; wherein, when the planting shovel is inserted into the underwater ground, the elastic soil pressing piece abuts the underwater ground and slides upwards until it abuts against the lower end of the limiting piece; when the planting shovel is pulled out of the underwater ground, the elastic soil pressing piece slides down to separate from the limiting piece based on the elastic force.

2. The position-limiting soil-pressing mechanism according to claim 1, characterized in that: The elastic soil-pressing member includes a soil-pressing plate located below the mounting seat, a plurality of sliding rods spaced apart on the soil-pressing plate, and a plurality of elastic elements respectively sleeved on the sliding rods; wherein each of the sliding rods passes upward through the mounting seat and is screwed with a first nut, and both ends of the elastic element are respectively in contact with the mounting seat and the soil-pressing plate.

3. The position-limiting soil-pressing mechanism according to claim 2, characterized in that: The soil pressing plate is provided with a plurality of first water permeable holes distributed at intervals.

4. The position-limiting soil-pressing mechanism according to claim 2, characterized in that: The limiting member includes at least one limiting rod vertically penetrated through the mounting seat, and the lower end of the limiting rod is located between the mounting seat and the soil pressing plate.

5. The position-limiting soil-pressing mechanism according to claim 4, characterized in that: The limiting rod is threadedly matched with the mounting seat, and a second nut is threadedly connected to the limiting rod, and the second nut abuts against the mounting seat up and down.

6. The position-limiting soil-pressing mechanism according to claim 4, characterized in that: A limiting plate is provided at the lower end of the limiting rod, and the limiting plate is used to abut against the upper plate surface of the soil pressing plate.

7. The position-limiting soil-pressing mechanism according to any one of claims 1 to 6, characterized in that: The mounting seat includes a hoop connected to the planting shovel and a connecting plate connected to the hoop; wherein the elastic soil pressing member and the limiting member are both connected to the connecting plate.

8. The position-limiting soil-pressing mechanism according to claim 7, characterized in that: The hoop is an open ring, and the two ends of the hoop are bent outward to form connecting ears, and the two connecting ears are connected by at least one fastener; the connecting plate is an open ring, and a plurality of second water-permeable holes are distributed on the connecting plate, and the two ends of the connecting plate are respectively connected to the two connecting ears.

9. The planting shovel assembly is characterized by: It comprises a limited soil pressing mechanism as described in any one of claims 1 to 8.

10. Seaweed planting machine, characterized in that: Comprising the planting shovel assembly as described in claim 9.