A mesh bag seeding device and method suitable for large scale seagrass bed ecological restoration

Abstract

A new type of net bag seeding device and method suitable for large-scale eelgrass bed ecological restoration relates to the technical field of marine ecological restoration. The device comprises an eelgrass seed net bag thin layer pre-preparation device and an eelgrass seed net bag seeder. The former adopts an automatic production line to prepare eelgrass seed net bag thin layers, and the latter specifically comprises a walking mechanism, a ditch opening mechanism, a net bag thin layer laying mechanism, a nailing mechanism, a bottom material returning mechanism and a chassis support, etc. The net bag seeder has ditch opening function, nailing function and bottom material returning function at the same time during operation, and the eelgrass seed-containing net bag thin layer is laid into the seabed material and fixed by nails and covered with soil by a returning structure, etc. The operation is highly automated and efficient, suitable for large-scale eelgrass seed seeding restoration, and the seabed surface after seeding is flush with the original seabed, so that the seeded eelgrass seeds are firmly fixed in the seabed material at the seeding position, ensuring the seedling rate of eelgrass seeds.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of marine ecological restoration, in particular to a seeding device and method suitable for eelgrass bed ecological restoration. BACKGROUND

[0002] Eelgrass bed has water quality purification and regulation functions such as absorbing nutrients and heavy metals in water body, reducing concentration of seawater suspended matter, and releasing oxygen; eelgrass can also prevent and slow down beach erosion, and is a natural barrier for protecting coast; eelgrass is a food supply and habitat for many animals and fishery resources, and is a key carrier of biodiversity, which plays a key and important role in improving and regulating ecological environment. Eelgrass bed protection and restoration has attracted great attention of people, and has become one of the hotspots of current ecological restoration.

[0003] Seed method, transplanting method and habitat restoration method are the main methods for eelgrass bed restoration, among which the biggest bottleneck of seed method and transplanting method at present is the lack of automatic operation equipment, and most of them rely on manual operation, which is limited by many conditions, has low operation efficiency, high operation cost, low seedling rate, and cannot carry out large-scale eelgrass bed ecological protection and restoration operation. The existing technology does not have a new type of net bag seeding device suitable for large-scale eelgrass bed ecological restoration. SUMMARY

[0004] In view of the pain point problem of seed method operation in current eelgrass bed restoration, the present application is proposed, that is, a new type of net bag seeding device suitable for large-scale eelgrass bed ecological restoration and method, and the specific design scheme is as follows:

[0005] A new type of net bag seeding device suitable for large-scale eelgrass bed ecological restoration, the complete device comprises an independent eelgrass seed net bag thin layer prefabrication device and an eelgrass seed net bag seeder;

[0006] The seed net bag thin layer pre-preparation device comprises a walking belt (1) with a conveying function, a first gauze reel (2), a first compression roller (3), a seed mud bin (4), a seed mud feeding screw (5), a second gauze reel (6), a second compression roller (7), a longitudinal sewing device (8), a transverse sewing device (9), a third compression roller (10), a seed net bag thin layer reel (11), and a net bag pre-preparation support (12). The walking belt (1), the first gauze reel (2), the first compression roller (3), the seed mud bin (4), the seed mud feeding screw (5), the second gauze reel (6), the second compression roller (7), the longitudinal sewing device (8), the transverse sewing device (9), the third compression roller (10), and the seed net bag thin layer reel (11) are all supported on the support (12). The first gauze reel (2) is arranged at the front end of the walking belt (1) (from the front end to the rear end in the conveying direction of the belt). The first compression roller (3) is fixed to the position close to the upper surface of the walking belt (1) behind the first gauze reel (2). The physical position of the first gauze reel (2) is higher than that of the first compression roller (3). The seed mud bin (4) is arranged behind the first compression roller (3) for downward feeding. The seed mud bin (4) is centrally matched with the seed mud feeding screw (5). The seed mud bin (4) is arranged above the walking belt (1). The second gauze reel (6) is arranged behind the seed mud bin (4). The second compression roller (7) is arranged behind the second gauze reel (6). The second compression roller (7) is close to the upper surface of the walking belt (1). The physical position of the second gauze reel (6) is higher than that of the second compression roller (7). The sewing device is arranged behind the second compression roller (7). The sewing device comprises the longitudinal sewing device (8) and the transverse sewing device (9) arranged in sequence behind the second compression roller (7). The third compression roller (10) and the seed net bag thin layer reel (11) are arranged in sequence behind the corresponding sewing device at the last position. The third compression roller (10) is close to the upper surface of the walking belt (1). The first gauze reel (2), the first compression roller (3), the second gauze reel (6), the second compression roller (7), the third compression roller (10), and the seed net bag thin layer reel (11) can rotate around their own shafts. The shafts are perpendicular to the conveying direction of the walking belt (1). The first gauze reel (2) is wound with the first gauze. The second gauze reel (6) is wound with the second gauze. The first gauze from the first gauze reel (2) is guided by the first compression roller (3) to tightly adhere to the walking belt (1). A plurality of seed mud bins (4) are adopted. The seed mud bins (4) are arranged in an array. Each seed mud bin (4) is filled with seed mud. The seed mud is extruded by the feeding screw (5) to the first gauze. The second gauze from the second gauze reel (6) is guided by the second compression roller (7) to be laid on the first gauze and cover the seed mud points.The longitudinal sewing device (8) and the transverse sewing device (9) are used to sew the mesh bag thin layer into a plurality of rectangular grids on the mesh bag, and each grid contains one seed mud point; the mesh bag thin layer is closely attached to the upper surface of the walking belt (1), guided by the third compression roller (10), and then connected to the seed mesh bag thin layer reel (11) to be wound on the seed mesh bag thin layer reel (11); the seed mesh bag thin layer reel (11) can be driven to rotate by a driving device.

[0007] The walking belt (1) is lowered in position in the form of a slope after the sewing device and in front of the third compression roller (10).

[0008] The first mesh and the second mesh are made of fiber material, and further made of hemp or cotton and other easily degradable plant fibers, and the mesh aperture is smaller than the smallest size of the radial direction of the seaweed seeds; the seed mud is uniformly mixed according to the proportion of seaweed seeds, sand, seawater, etc., and the content of the seeds is adjusted according to the seeding density of the seaweed seeds.

[0009] The method for preparing the seaweed seed mesh bag thin layer by the seaweed seed mesh bag thin layer preparation device includes the following steps: first, a first layer of mesh is laid on the walking belt (1) by the first mesh reel (2) and the first compression roller (3), then the seed mud is intermittently output to the first layer of mesh by a plurality of seed mud bins (4) arranged in a row, so that the seed mud forms a grid-shaped point layout on the bottom layer of mesh, then a second layer of mesh is laid on the seed mud by the second mesh reel (6) and the second compression roller (7), at the same time, the seed mud also forms a thin layer under the action of the second compression roller (7), then the upper and lower two layers of mesh containing the seed mud thin layer are longitudinally and transversely cross-sewn by the longitudinal sewing device (8) and the transverse sewing device (9) to form a mesh bag thin layer with a grid shape, and finally the seed mesh bag thin layer is wound into a reel by the third compression roller (10) and the mesh bag thin layer reel (11), and is temporarily stored in an environment containing seawater.

[0010] The seaweed seed mesh bag seeder specifically includes a walking mechanism (13), a furrowing mechanism (14), a mesh bag thin layer laying mechanism (15), a pinning mechanism (16), a bottom material returning mechanism (17), and a chassis support (18); the walking mechanism (13) can be selected from structures such as a track, a wheel type, or a floating plate according to different seabed substrates; the two chassis supports (18) are connected to the wheel shafts of the two parallel walking mechanisms (13) through bearing seats and bearings, and are supported side by side between the two parallel walking mechanisms (13) and form an integral whole; the side-by-side direction of the two chassis supports (18) is perpendicular to the direction in which the two walking mechanisms (13) travel in parallel, one chassis support (18) is in front, and the other chassis support (18) is in back.

[0011] The ditching mechanism (14) comprises a ditching plough (19), a ditch guard (20), a first lifting mechanism (21) and a first support (22); the ditching plough (19) is a forward ridge-shaped vertical thin blade structure (two straight plates are welded to form a sharp corner with the sharp corner facing forward), the vertical height matches the ditching depth; the ditch guard (20) is welded to the rear side of the ditching plough and is symmetrically arranged (i.e. the rear of each plate is welded with a ditch guard), the height is the same as the height of the ditching plough, and the ditching plough forms an integral structure; the ditching width matches the width of the fourth compression roller (23), and each compression leg corresponds to a left and right side with a margin; the upper end of the first lifting mechanism (21) is arranged on the first support (22), and the lower end of the first lifting mechanism (21) is hingedly connected with the ditch guards (20) on both sides, so that the ditching plough (19) and the ditch guard (20) can be lifted or lowered by the first lifting mechanism (21) under the driving of electricity or hydraulic pressure; the first support (22) is welded with the front chassis support (18);

[0012] The net bag thin layer laying mechanism (15) is arranged behind the ditching mechanism (14) and comprises a net bag thin layer reel (11), a fourth compression roller (23), a net bag thin layer (24), a fourth compression roller support (25) and a net bag thin layer reel support (26); the net bag thin layer reel support (26) is welded on the first support (22), the aforementioned prepared net bag thin layer reel (11) is placed on the reel support (26) through a bearing seat, and the net bag thin layer (24) is wound on the net bag thin layer reel (11); a fourth compression roller (23) is arranged below the rear of the net bag thin layer reel (11), the fourth compression roller (23) is hingedly connected to the fourth compression roller support (25) through a center shaft, and the fourth compression roller support (25) is hingedly connected to the lower end of the first lifting mechanism (21) or the ditch guard (20) through a cantilever; so that the fourth compression roller (23) can be lifted and lowered with the aforementioned ditching plough (19) and ditch guard (20); the fourth compression roller (23) is lowered to a position between the aforementioned ditch guards (20);

[0013] The staple mechanism (16) is located behind the aforementioned net bag thin layer laying mechanism (15) and above the net bag thin layer (24) laid in the aforementioned laying channel, and comprises a staple frame (27), a spring (28), a staple feeding plate (29), a bench staple (30), a staple pressing leg (31) and a staple pressing driving mechanism (32); the staple frame (27) is welded on the rear one of the chassis supports (18); the staple frame (27) is an H-shaped cantilever structure, comprising two vertical columns, two cantilevers and a fence, one end of one cantilever is connected to one vertical column perpendicularly, one end of the cantilever is connected to the fence, the two cantilevers and the fence form a long rectangular frame with one side missing, vertical grooves are arranged on the two vertical columns, the inner sides of the two cantilevers opposite to each other are provided with grooves, and the grooves on the vertical columns are in communication with the grooves on the cantilevers connected thereto; one end of the spring (28) is welded on the fence, the other end is welded on one side of the staple feeding plate (29), the other side of the staple feeding plate (29) is pressed on one side of the bench staple (30), a plurality of bench staples (30) are arranged in an orderly manner, and the two ends of the staple feeding plate (29) and the bench staple (30) are clamped in the clamping grooves of the cantilever (27), so that the bench staple (30) can move forward in the long rectangular frame along the grooves in the cantilever under the joint action of the spring (28) and the staple feeding plate (29) and slide into the grooves of the two vertical columns of the staple frame (27); the staple pressing leg (31) has a structure with two pressing legs, is located between the two vertical columns and above the horizontal plane where the bench staple is located, and each pressing leg is located in the groove of one vertical column and corresponds to one end of the bench staple, so that the staple pressing leg (31) can exert downward pressure on the bench staple moved from below under the action of the driving mechanism (32), so that the bench staple is driven into the seabed and the aforementioned net bag thin layer is fixed in the trench formed by the aforementioned trenching plow (19) and the trench protection plate (20); the staple pressing driving mechanism (32) is connected with the staple pressing leg (31) and can be a hydraulic mechanism or a four-bar linkage, gear or other mechanical mechanism;

[0014] The substrate recovery mechanism (17) is located behind the aforementioned staple mechanism (16) and comprises a recovery frame (33), a connecting rod (34), a second lifting mechanism (35) and a second support (36); the recovery frame (33) is a backward ridge-shaped vertical structure, comprising two vertically arranged plates welded at the back edges to form a sharp corner, the sharp corner faces backward, and the two ends of the connecting rod (34) are rigidly connected to the two sides of the sharp corner to form a triangular frame; the coverage width of the recovery frame (33) is greater than that of the aforementioned trenching plow (19) and the trench protection plate (20); the upper end of the second lifting mechanism (35) is arranged on the second support (36), and the lower end of the second lifting mechanism (35) is hingedly connected to the connecting rod (34), so that the recovery frame (33) can be lifted or lowered under the action of electricity or hydraulic drive through the second lifting mechanism (35); the second support (36) is welded on the rear one of the aforementioned chassis supports (18);

[0015] The first lifting mechanism (21) and the second lifting mechanism (35) adopt a shaped electric or hydraulic push rod structure. The first lifting mechanism (21) and the second lifting mechanism (35) each include a telescopic structure, a crossbar perpendicular to the telescopic structure, and two support rods, the lower end of the telescopic structure is rotationally connected to the middle of the crossbar, the lower ends of the two support rods are respectively rotationally connected to the two ends of the crossbar, the upper end of the telescopic structure is fixedly connected to the first support (22) or the second support (36), the upper ends of the two support rods are rotationally connected to the first support (22) or the second support (36), the connection points of the upper end of the telescopic structure and the first support (22) or the second support (36) and the connection points of the upper ends of the two support rods and the first support (22) or the second support (36) are located in a vertical plane, and the crossbar is fixedly connected to the ditch guard plate (20) or is fixedly connected in parallel with the connecting rod (34).

[0016] The specific operation steps for sowing the seagrass seeds into the seabed by using the prepared net bag thin layer reel prepared by the aforementioned preparation device and method and the seagrass seed net bag sowing machine include:

[0017] Step 1: install the prepared seagrass seed thin layer reel temporarily stored in the seawater container into the net bag sowing machine reel support (26), press one end of the thin layer into the fourth press roller (23), lift the ditching plow (19), the ditch guard plate (20) and the fourth press roller (23) by the first lifting mechanism (21), lift the bottom material return frame (33) by the second lifting mechanism (35), and then drive the sowing machine to the sowing site by using the walking mechanism (13) by traction or driving force.

[0018] Step 2: lower the ditching plow (19), the ditch guard plate (20) and the fourth press roller (23) by the first lifting mechanism (21), lower the bottom material return frame (33) by the second lifting mechanism (35), and start sowing. As the walking mechanism (13) continuously moves forward, the ditching plow (19) opens a ditch with a depth of about 2-3 cm under the action of the driving force, the ditch guard plate (20) behind the ditching plow protects the ditch from collapsing, the net bag thin layer is laid into the newly opened ditch under the action of the fourth press roller (23) between the ditch guard plates, the bench nail (30) is nailed into the seabed at the same time, the net bag thin layer is fixed in the ditch, the bottom material return frame (33) at the back covers the bottom material on both sides of the ditch onto the net bag thin layer and makes the surface level with the seabed bottom. Thus, as the sowing machine moves forward, the seagrass seed net bag is continuously laid into the seabed bottom and fixed and covered with soil, and the sowing construction is completed.

[0019] The sewing device is a conventional device used in a factory to perform flat hook sewing.

[0020] The above operation method is only an embodiment of the present application, but the present application is not limited to the above embodiment, and all other embodiments obtained by those skilled in the art without creative labor on the basis of the present application fall within the scope of protection of the present application.

[0021] The present application has the following advantages:

[0022] 1. Compared with the traditional net bag, the sea grass seed net bag is made by an automatic production line, and the efficiency of net bag preproduction is greatly improved.

[0023] 2. The seed distribution in the sea grass seed net bag uses seed mud as the material medium, and is uniformly fed by the feeding screw, so that the number of seeds in each net bag is uniform and controllable.

[0024] 3. The net bag is pre-produced into a thin layer reel, and is laid on the seabed by a seeding machine, so that the operation efficiency is greatly improved, the seeding operation cost is greatly reduced, and the method is suitable for large-scale sea grass bed ecological restoration operation.

[0025] 4. The seeding machine has the functions of ditching, nailing and bottom material covering when working, can sow the sea grass seeds in the net bag into the bottom material, and fix them by nails and cover the soil by the covering structure, so that the surface of the seeded seabed is flush with the original seabed, and the seeded sea grass seeds are firmly fixed in the bottom material at the seeding position, ensuring the seedling rate of the sea grass seeds. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions and embodiments of the present application, the drawings involved will be briefly introduced as follows.

[0027] Figure 1 Schematic view of sea grass seed net bag thin layer preproduction device

[0028] Figure 2 Schematic view of sea grass seed net bag thin layer

[0029] Figure 3 Schematic view of sea grass seed net bag seeding machine assembly

[0030] Figure 4 Schematic view of walking mechanism and chassis support

[0031] Figure 5 Schematic view of ditching mechanism

[0032] Figure 6 Schematic view of net bag thin layer laying mechanism

[0033] Figure 7 Schematic view of nailing mechanism

[0034] Figure 8 Schematic view of bottom material covering mechanism

[0035] In the figure, 1 walking belt, 2 first gauze reel, 3 first compression roller, 4 seed mud bin, 5 seed mud feeding screw, 6 second gauze reel, 7 second compression roller, 8 longitudinal sewing equipment, 9 transverse sewing equipment, 10 third compression roller, 11 seed gauze sheet reel, 12 gauze sheet pre-preparation support, 13 walking mechanism, 14 ditching mechanism, 15 gauze sheet laying mechanism, 16 stapling mechanism, 17 bottom return mechanism, 18 chassis support, 19 ditching plow, 20 ditch guard, 21 first lifting mechanism, 22 first support, 23 fourth compression roller, 24 gauze sheet, 25 fourth compression roller support, 26 gauze sheet reel support, 27 stapling frame, 28 spring, 29 nail feeding plate, 30 bench nail, 31 nail pressing leg, 32 nail pressing driving mechanism, 33 return frame, 34 connecting rod, 35 second lifting mechanism, 36 second support. DETAILED DESCRIPTION

[0036] The application is further described below in conjunction with examples, but the application is not limited to the following examples, and all other examples obtained by those of ordinary skill in the art without creative labor based on the application are within the scope of protection of the application.

[0037] As shown in the accompanying drawings Figures 1-8 The following examples provide a new gauze seeding device and method suitable for large-scale seagrass bed ecological restoration. The complete device mainly includes a seagrass seed gauze sheet pre-preparation device and a seagrass seed gauze seeding machine.

[0038] The seed net bag thin layer pre-preparation device comprises a walking belt (1), a first gauze reel (2), a first compression roller (3), a seed mud storage bin (4), a seed mud feeding screw (5), a second gauze reel (6), a second compression roller (7), a longitudinal sewing device (8), a transverse sewing device (9), a third compression roller (10), a seed net bag thin layer reel (11), and a net bag pre-preparation support (12). The walking belt (1), the first gauze reel (2), the first compression roller (3), the seed mud storage bin (4), the seed mud feeding screw (5), the second gauze reel (6), the second compression roller (7), the longitudinal sewing device (8), the transverse sewing device (9), the third compression roller (10), and the seed net bag thin layer reel (11) are all supported on the support (12). The fiber material of the first gauze and the second gauze is plant fiber such as hemp or cotton, and the gauze aperture is smaller than the short diameter of the seaweed seed. The seed mud is uniformly mixed according to the proportion of seaweed seeds, sand, and seawater, and the content of the seeds is adjusted according to the seeding density of the seaweed seeds. The method for pre-preparing the seaweed seed net bag thin layer by the seaweed seed net bag thin layer pre-preparation device comprises the following steps: first, the first gauze reel (2) and the first compression roller (3) lay the first layer of gauze on the walking belt (1), then the multiple seed mud feeding screws (5) arranged in a row intermittently output the seed mud to the first layer of gauze, so that the seed mud forms a grid-shaped point layout on the bottom layer of gauze, then the second gauze reel (6) and the second compression roller (7) lay the second layer of gauze above the seed mud, and at the same time, the seed mud also forms a thin layer under the action of the second compression roller (7), then the longitudinal sewing device (8) and the transverse sewing device (9) cross-sew the upper and lower two layers of gauze containing the seed mud thin layer in the longitudinal and transverse directions, forming a grid-shaped net bag thin layer, and finally the third compression roller (10) and the net bag thin layer reel (11) roll the seed net bag thin layer into a reel, and the seed net bag thin layer is temporarily stored in an environment containing seawater.

[0039] The seaweed seed net bag seeding machine comprises a walking mechanism (13), a ditching mechanism (14), a net bag thin layer laying mechanism (15), a stapling mechanism (16), a bottom material returning mechanism (17), a chassis support (18), and the like. The walking mechanism (13) can select a track, a wheel type, or a floating plate structure according to different seabed substrates. The chassis support (18) is connected to the wheel shaft of the walking mechanism (13) through a bearing seat and a bearing, thereby being supported on the walking mechanism (13).

[0040] The trenching mechanism (14) comprises a trenching plough (19), a trench guard (20), a first lifting mechanism (21) and a first support (22); the trenching plough (19) is a forward ridge-shaped vertical thin blade structure, the vertical height of which matches the trenching depth; the trench guard (20) is welded to the rear side of the trenching plough, symmetrically arranged, and has the same height as the trenching plough, forming an integral structure with the trenching plough; the trenching width matches the width of the seaweed seed thin layer laying and pressing roller, with a margin left on the left and right sides; the first lifting mechanism (21) adopts a shaped electric or hydraulic push rod structure, the fixed point of which is arranged on the first support (22), and the functional action point of which is hinged on both sides of the trench guard (20), so that the trenching plough (19) and the trench guard (20) are lifted or lowered by the first lifting mechanism (21) under the driving of the electric or hydraulic drive; the first support (22) is welded on the aforementioned chassis support (18);

[0041] The net bag thin layer laying mechanism (15) is arranged behind the trenching mechanism (14) and comprises a net bag thin layer reel (11), a fourth pressing roller (23), a net bag thin layer (24), a fourth pressing roller support (25) and a net bag thin layer reel support (26), wherein the net bag thin layer reel support (26) is welded on the aforementioned first support (22); during the seaweed bed planting work, the aforementioned prefabricated seaweed seed net bag thin layer reel is placed on the reel support (26) through a bearing seat, and under the traction of the seeding machine, the net bag thin layer is laid into the trench formed by the trenching plough (19) and the trench guard (20) under the action of the fourth pressing roller (23); the fourth pressing roller (23) is hinged on the fourth pressing roller support (25) through a center shaft, and the fourth pressing roller support (25) is hinged on the aforementioned first lifting mechanism (21) through a cantilever, so that the fourth pressing roller (23) can be lifted and lowered together with the aforementioned trenching plough (19) and the trench guard (20); the position of the fourth pressing roller (23) when it is lowered is between the aforementioned trench guard (20);

[0042] The staple mechanism (16) is located behind the aforementioned net bag thin layer laying mechanism (15) and above the net bag thin layer laid in the aforementioned laying channel, and comprises a staple frame (27), a spring (28), a staple feeding plate (29), a bench staple (30), a staple pressing leg (31) and a staple pressing driving mechanism (32); the staple frame (27) is welded on the aforementioned chassis support (18), and the (27) is an H-shaped structure with a cantilever, and grooves are formed in the H-shaped column and the structure on both sides of the cantilever; one end of the spring (28) is welded on the surrounding plate on the outside of the cantilever structure of the (27), and the other end is welded on one end face of the staple feeding plate (29); the other end face of the (29) is pressed on one side of the bench staple (30); the plurality of bench staples (30) are arranged in order, and both ends are clamped in the clamping grooves on the cantilever; under the joint action of the spring (28) and the staple feeding plate (29), the bench staple continuously moves forward along the groove in the cantilever and slides into the groove in the column on both sides of the H-shaped structure; the staple pressing leg (31) is a structure with two pressing legs, which is located between the columns on both sides of the H-shaped structure and above the horizontal plane where the bench staple is located; under the action of the driving mechanism (32), the staple pressing leg (31) applies downward pressure to the bench staple moved to the lower surface, so that the bench staple is driven into the seabed and the aforementioned net bag thin layer is fixed in the groove formed by the aforementioned trench plow (19) and the trench guard plate (20); the staple pressing driving mechanism (32) can be a hydraulic mechanism or a four-bar linkage, gear or other mechanical mechanism.

[0043] The substrate recovery mechanism (17) is located behind the aforementioned staple mechanism (16) and comprises a recovery frame (33), a connecting rod (34), a second lifting mechanism (35) and a second support (36); the recovery frame (33) is a backward ridge type vertical structure, and the two sides are rigidly connected through the two ends of the connecting rod (34) to form a frame; the coverage width of the recovery frame (33) is greater than the coverage width of the aforementioned trench plow (19) and the trench guard plate (20); the second lifting mechanism (35) adopts a shaped electric or hydraulic push rod structure, the fixed point of which is arranged on the second support (36), and the functional action point of which is hinged to two points on the connecting rod (34); thus, under the electric or hydraulic drive, the recovery frame (33) is lifted or lowered through the second lifting mechanism (35); the second support (36) is welded on the aforementioned chassis support (18);

[0044] The specific operation steps of sowing the seagrass seeds into the seabed by using the net bag thin layer reel prepared by the aforementioned preparation device and method and through the aforementioned seagrass seed net bag sowing machine include:

[0045] First step: install the prepared thin layer of seed reel in the net bag seeder reel support (26) and press one end of the thin layer under the fourth roller (23), at the same time, lift the furrower (19), the furrow guard (20) and the fourth roller (23) by the first lifting mechanism (21), lift the substrate return frame (34) by the second lifting mechanism (35), then drive the seeder to the seeding site by the walking mechanism (13) through traction or driving force;

[0046] Second step: lower the furrower (19), the furrow guard (20) and the fourth roller (23) by the first lifting mechanism (21), lower the substrate return frame (33) by the second lifting mechanism (35), start seeding, as the walking mechanism (13) continues to move forward, the furrower (19) opens a trench about 2-3 cm deep under the action of traction, the trench is protected from collapsing by the furrow guard (20) behind it, the net bag thin layer is laid into the newly opened trench under the action of the fourth roller (23) between the furrow guards, the bench nail (30) is nailed into the seabed at the same time as the net bag thin layer is fixed in the trench by the nailing mechanism behind it, the substrate return frame (33) at the back covers the substrate on both sides of the trench onto the net bag thin layer and makes the surface level with the seabed, thus, as the seeder moves forward, the seaweed seed net bag is continuously laid and fixed on the seabed and covered with soil, completing the seeding operation.

Claims

1. A mesh bag seeding device suitable for large-scale eelgrass bed ecological restoration, characterized in that, The application relates to a seaweed seed net bag thin layer pre-preparation device and a seaweed seed net bag seeder. The seaweed seed net bag thin layer preforming device specifically comprises a walking belt (1) with a conveying function, a first gauze reel (2), a first compression roller (3), a seed mud bin (4), a seed mud feeding screw (5), a second gauze reel (6), a second compression roller (7), a longitudinal sewing device (8), a transverse sewing device (9), a third compression roller (10), a seed net bag thin layer reel (11), and a net bag preforming support (12), wherein the walking belt (1), the first gauze reel (2), the first compression roller (3), the seed mud bin (4), the seed mud feeding screw (5), the second gauze reel (6), the second compression roller (7), the longitudinal sewing device (8), the transverse sewing device (9), the third compression roller (10), and the seed net bag thin layer reel (11) are all supported on the net bag preforming support (12); the first gauze reel (2) is arranged at the front end above the walking belt (1), the first compression roller (3) is fixed to the part close to the upper surface of the walking belt (1) behind the first gauze reel (2), the physical position of the first gauze reel (2) is higher than that of the first compression roller (3), the seed mud bin (4) for downward feeding is arranged behind the first compression roller (3), the seed mud feeding screw (5) is matched in the center of the seed mud bin (4), the seed mud bin (4) is located above the walking belt (1), the second gauze reel (6) is arranged behind the seed mud bin (4), the second compression roller (7) is arranged behind the second gauze reel (6), the second compression roller (7) is close to the upper surface of the walking belt (1), the physical position of the second gauze reel (6) is higher than that of the second compression roller (7), the sewing device is arranged behind the second compression roller (7), the longitudinal sewing device (8) and the transverse sewing device (9) are sequentially arranged behind the second compression roller (7), or the transverse sewing device (9) and the longitudinal sewing device (8) are sequentially arranged behind the second compression roller (7), the third compression roller (10) and the seed net bag thin layer reel (11) are sequentially arranged behind the sewing device corresponding to the last position, and the third compression roller (10) is close to the upper surface of the walking belt (1); the first gauze reel (2), the first compression roller (3), the second gauze reel (6), the second compression roller (7), the third compression roller (10), and the seed net bag thin layer reel (11) can rotate around their own shafts, and the shafts are all perpendicular to the conveying direction of the walking belt (1); the first gauze reel (2) is wound with a first gauze, and the second gauze reel (6) is wound with a second gauze; the first gauze from the first gauze reel (2) is guided to tightly adhere to the walking belt (1) through the first compression roller (3); a plurality of seed mud bins (4) are adopted, the plurality of seed mud bins (4) are arranged in an array, each seed mud bin (4) is filled with seed mud, and the seed mud is extruded and fed onto the first gauze through the feeding screw (5); the second gauze from the second gauze reel (6) is guided to be laid on the first gauze and cover the arrayed seed mud points through the second compression roller (7).The seed net bag is formed by longitudinal sewing equipment (8) and horizontal sewing equipment (9), and a plurality of rectangular grids are formed on the seed net bag, and each grid contains one seed mud point; the seed net bag is tightly attached to the upper surface of the walking belt (1), guided by the third pressing roller (10), and then connected with the seed net bag thin layer reel (11) and wound on the seed net bag thin layer reel (11). The seaweed seed net bag seeder comprises a walking mechanism (13), a ditching mechanism (14), a net bag thin layer laying mechanism (15), a nailing mechanism (16), a bottom material returning mechanism (17) and a bottom disc support (18); the walking mechanism (13) is selected according to different seabed materials and is provided with a caterpillar, a wheel type or a floating plate; two bottom disc supports (18) are connected with the wheel shafts of two parallel walking mechanisms (13) through bearing seats and bearings, and the two bottom disc supports (18) are supported side by side between the two parallel walking mechanisms (13) and are integrated; the side-by-side direction of the two bottom disc supports (18) is perpendicular to the parallel walking direction of the two walking mechanisms (13), one bottom disc support (18) is in front, and the other bottom disc support (18) is in back. The ditching mechanism (14) comprises a ditching plough (19), ditch protection plates (20), a first lifting mechanism (21) and a first support (22); the ditching plough (19) is provided with a forward ridge-shaped vertical thin blade structure, the vertical surface height is matched with the ditching depth; the ditch protection plates (20) are welded on the rear side of the ditching plough and are symmetrically arranged and have the same height as the ditching plough, and form an integrated structure with the ditching plough; the ditching width is matched with the width of the fourth compression roller (23) and has a left and right side margin; the upper end of the first lifting mechanism (21) is connected to the first support (22), and the function point of the lower end of the first lifting mechanism (21) is hinged with the two side ditch protection plates (20), so that the ditching plough (19) and the ditch protection plates (20) can be lifted or lowered through the first lifting mechanism (21) under the driving of electricity or hydraulic pressure; and the first support (22) is welded with the front bottom disc support (18). The net bag thin layer laying mechanism (15) is arranged behind the ditching mechanism (14) and comprises a net bag thin layer reel (11), a fourth compression roller (23), a net bag thin layer (24), a fourth compression roller support (25) and a net bag thin layer reel support (26); the net bag thin layer reel support (26) is welded on the first support (22), the pre-prepared net bag thin layer reel (11) is placed on the reel support (26) through a bearing seat, and the net bag thin layer (24) is wound on the net bag thin layer reel (11); the fourth compression roller (23) is arranged below the rear of the net bag thin layer reel (11), the fourth compression roller (23) is hinged on the fourth compression roller support (25) through a center shaft, the fourth compression roller support (25) is hinged on the lower end of the first lifting mechanism (21) or the ditch protection plates (20) through a cantilever; the fourth compression roller (23) is lifted or lowered together with the ditching plough (19) and the ditch protection plates (20); and the fourth compression roller (23) is located between the ditch protection plates (20) when being lowered. The staple mechanism (16) is located behind the net bag thin layer laying mechanism (15) and above the net bag thin layer (24) laid in the channel, and comprises a staple frame (27), a spring (28), a staple feeding plate (29), a bench staple (30), a staple pressing leg (31) and a staple pressing driving mechanism (32); the staple frame (27) is welded on the rear one of the chassis supports (18); the staple frame (27) is an H-shaped cantilever structure, comprising two upright columns, two cantilever arms and a fence, one end of one cantilever arm is connected with one upright column perpendicularly, one end of the cantilever arm is connected with the fence, the two cantilever arms and the fence form a rectangular frame with one side missing, vertical grooves are arranged on the two upright columns, the inner sides of the two cantilever arms opposite to each other are provided with grooves, and the grooves on the upright columns are in communication with the grooves on the corresponding cantilever arms; one end of the spring (28) is welded on the fence, the other end is welded on one side of the staple feeding plate (29), the other side of the staple feeding plate (29) is pressed on one side of the bench staple (30), the plurality of bench staples (30) are arranged in order, and the two ends of the staple feeding plate (29) and the bench staple (30) are clamped in the cantilever slot of the staple frame (27), so that the bench staple (30) can move forward in the rectangular frame along the groove in the cantilever arm under the joint action of the spring (28) and the staple feeding plate (29) and slide into the groove of the upright column on the two sides of the staple frame (27); the staple pressing leg (31) has a structure with two pressing legs, is located between the two upright columns and above the horizontal plane where the bench staple is located, and each pressing leg is located at one end of one bench staple, so that the staple pressing leg (31) can exert downward pressure on the bench staple moved and fed below under the action of the driving mechanism (32), so that the bench staple is driven into the seabed and the net bag thin layer is fixed in the trench formed by the trenching plow (19) and the trench guard plate (20); The substrate recovery mechanism (17) is located behind the staple mechanism (16) and comprises a recovery frame (33), a connecting rod (34), a second lifting mechanism (35) and a second support (36); the recovery frame (33) is a roof-shaped vertical structure protruding backward, comprising two upright plates welded to form a sharp corner, the sharp corner faces backward, and the plates of the sharp corner are connected with a vertical side plate; the two ends of the connecting rod (34) are rigidly connected with the side plates, so that the sharp corner, the side plate and the connecting rod (34) form a pentagonal frame; the covering width of the recovery frame (33) is greater than the covering width of the trenching plow (19) and the trench guard plate (20); the upper end connection point of the second lifting mechanism (35) is arranged on the second support (36), and the lower end functional point of the second lifting mechanism (35) forms a hinge with the connecting rod (34), so that the recovery frame (33) can be lifted or lowered by the second lifting mechanism (35) under the action of electric or hydraulic drive; and the second support (36) is welded on the rear one of the chassis supports (18).

2. The mesh bag seeding device for large-scale seagrass bed ecological restoration according to claim 1, characterized in that, The walking belt (1) in the net bag thin layer prefabrication device gradually decreases in slope form between the rear of the sewing equipment and the front of the third pressing roller (10).

3. The mesh bag seeding device for large-scale seagrass bed ecological restoration according to claim 1, characterized in that, The first and second gauze nets are made of easily degradable plant fiber, and the gauze aperture is smaller than the radial minimum size of the seaweed seed; the seed mud is uniformly mixed according to the proportion of seaweed seeds, silt and seawater, and the content of the seeds is adjusted according to the seeding density of the seaweed seeds.

4. The mesh bag seeding device for large-scale seagrass bed ecological restoration according to claim 1, characterized in that, The nail driving mechanism (32) is connected with the nail leg (31), and the nail driving mechanism (32) is a hydraulic mechanism, a four-bar linkage or a gear.

5. The mesh bag seeding device for large-scale seagrass bed ecological restoration according to claim 1, characterized in that, The first lifting mechanism (21) and the second lifting mechanism (35) adopt a shaped electric or hydraulic push rod structure.

6. A mesh bag seeding device suitable for large scale seagrass bed ecological restoration according to claim 1, characterized in that, The first lifting mechanism (21) and the second lifting mechanism (35) each include a telescopic structure, a crossbar perpendicular to the telescopic structure, and two support rods, the lower end of the telescopic structure is rotationally connected with the middle of the crossbar, the lower ends of the two support rods are respectively rotationally connected with the two ends of the crossbar, the upper end of the telescopic structure is fixedly connected with the first support (22) or the second support (36), the upper ends of the two support rods are rotationally connected with the first support (22) or the second support (36), the connection points of the upper end of the telescopic structure with the first support (22) or the second support (36) and the upper ends of the two support rods with the first support (22) or the second support (36) are located in a vertical plane, and the crossbar is fixedly connected with the ditch guard plate (20) or fixedly connected in parallel with the connecting rod (34).

7. A mesh bag seeding device suitable for large scale seagrass bed ecological restoration according to claim 1, characterized in that, The method for preforming the seaweed seed net bag thin layer by the seaweed seed net bag thin layer preforming device includes the following steps: first, a first layer of gauze is laid on the walking belt (1) by the first gauze reel (2) and the first pressing roller (3), then seed mud is intermittently output to the first layer of gauze by a plurality of seed mud bins (4) arranged in a row, so that the seed mud is arranged in a grid shape on the bottom layer of gauze, then a second layer of gauze is laid above the seed mud by the second gauze reel (6) and the second pressing roller (7), at the same time, the seed mud is also formed into a thin layer under the action of the second pressing roller (7), then the upper and lower two layers of gauze containing the seed mud thin layer are cross-sewn in the longitudinal and transverse directions by the longitudinal sewing equipment (8) and the transverse sewing equipment (9), to form a plurality of grid-shaped net bag thin layers, and finally the seed net bag thin layer is wound into a reel by the third pressing roller (10) and the net bag thin layer reel (11), and is temporarily stored in an environment containing seawater.

8. The mesh bag seeding device for large-scale seagrass bed ecological restoration according to claim 1, characterized in that, The specific operation steps of sowing seaweed seeds into the seabed by the seaweed seed net bag sowing machine include: First step: the seaweed seed thin layer reel temporarily stored in the container containing seawater is installed on the net bag sowing machine reel support (26), one end of the thin layer is pressed into the fourth pressing roller (23), the ditching plow (19), the ditch guard plate (20) and the fourth pressing roller (23) are lifted by the first lifting mechanism (21), the bottom material return frame (33) is lifted by the second lifting mechanism (35), and then the sowing machine is driven to the sowing site by the walking mechanism (13) through traction or driving force. Second step: through the first lifting mechanism (21) to put down the ditching plough (19), ditch guard (20) and the fourth pressure roller (23), through the second lifting mechanism (35) to put down the bottom material back to the frame (33), start seeding, with the walking mechanism (13) constantly forward, through the support and mechanism transmission, the ditching plough (19) is opened under the action of driving force, about 2-3cm deep trench, the ditch guard (20) behind protects the trench from collapsing, under the action of the fourth pressure roller (23) between the ditch guard, the net bag thin layer is laid into the newly opened trench, the nail mechanism behind it at the same time, the bench nail (30) is nailed into the seabed, the net bag thin layer is fixed in the trench, the bottom material back to the frame (33) at the back of the last one covers the bottom material on both sides of the trench to the net bag thin layer, and makes the surface level with the seabed, thus, with the forward of the seeding machine, the seaweed seed net bag is continuously laid into the seabed and fixed to the soil, and the seeding construction is completed.

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