CN204350805U - A kind of thalassophyte cultivator - Google Patents

Abstract

The utility model discloses a marine plant cultivating device, which aims to provide a marine plant cultivating device which can not only control the suspension depth of reef bodies, but also proliferate in the middle, upper middle or lower middle layers of the water area. It includes a buoyancy device, a main rod, a number of algae reef supports and connecting ropes; The reef is attached to the base block, the lower end of the connecting vertical sleeve is located below the hemispherical support frame, and the upper end of the connecting vertical sleeve is located above the hemispherical support frame; one end of the main rod is provided with a limit stop, and the other end is provided with a thread and Locking nuts are provided on the thread; each algal reef support body is sleeved on the main rod through connecting vertical sleeves, and the main body rod and each algal reef support body are suspended below the buoyancy device through a connecting rope, and one end of the connecting rope is connected to the buoyancy device. The buoyancy device is connected, and the other end is connected with the end of the main body rod near the lock nut.

Description

A device for cultivating marine plants

technical field

The utility model relates to an algae reef, in particular to a marine plant breeding device placed in coastal sea areas.

Background technique

Artificial algae reefs are artificial reefs that specialize in the proliferation of algae. They are artificially set in waters to provide a place for growth and reproduction of marine algae; thus attracting fish and shrimp and other aquatic animals to come to the algae farm to seek food and breed, so as to optimize the seabed environment. The purpose of protecting and multiplying fishery resources; and during the growth process, algae can absorb N and P in the water through photosynthesis to synthesize their own organic substances, and release oxygen, reduce the concentration of N and P in the water body, purify the water environment, and save water. Prevention and control of eutrophication in water areas. Improve the ecological environment of water areas, restrain the outbreak of "red tide", absorb heavy metal ions, and protect the marine environment. On the other hand, the economic value created by the seaweed farm is very large, and the seaweed itself has industrial, edible and medical value.

Most of the current artificial algal reefs are bottom-sinking algal reefs, that is, the algal reefs will sink to the bottom of the sea after being put into the sea, and can only build algae farms on the bottom of the sea; they cannot use the middle, upper middle, or lower middle layers of the water for proliferation, so how to It is very meaningful to purify the water environment and improve the ecological environment of the water area by further utilizing the middle layer, upper middle layer or lower middle layer of the water area for multiplication.

For example, Chinese Patent Publication No. CN202680165U, published on January 23, 2013, the name created by the utility model is a reef body for seaweed transplantation, which includes two parts: a steel base and an algae reef base, and the steel base and the algae reef The substrate is a split structure, the algal reef substrate is in the shape of a dome made of concrete, the steel base is connected to the middle of the algal reef substrate through the vertical connection part on it, and the algal reef substrate is provided with a Reserved holes for small reef blocks. The reef body used for seaweed transplantation in this application is also a sunken type algae reef.

For example, Chinese Patent Publication No. CN102657072A, published on September 12, 2012, the name created by the utility model is a fixing method for artificially transplanting algae reefs. The method includes the following steps: Drilling holes; fixing artificial algae reefs of various sizes and shapes on the natural rock matrix through connecting components. This application is also a sunken type algae reef.

For example, Chinese Patent Publication No. CN103609424A, published on March 25, 2014, the name created by the utility model is a composite artificial algae reef, including algae-forming reefs and seedling reefs, and the algae-forming reefs include a solid base, solid The upper surface of the base is inlaid with a metal frame with the same shape and size as the upper surface. There is a shell net bag inside the metal frame. A metal pole is inlaid in the center of the upper surface. A steel ring is welded to the upper end of the pole. Between the metal frame and the steel ring Several seedling ropes are fixed, and the seedling reef is fastened on the side of the solid base of the algae-forming reef, and seaweed seedlings are attached to the seedling reef. The artificial algal reef of this application is also a sunken type algal reef.

Utility model content

The first purpose of this utility model is to overcome that most of the marine plant cultivation devices in the prior art are bottom-sinking algae reefs, which cannot use the middle, upper, or middle and lower layers of the water area for proliferation, and provide a method that can control the suspension depth of algae reefs. , a marine plant cultivation device that makes full use of the middle, upper middle or lower middle layers of the water area for multiplication.

Another purpose of the utility model on the basis of the first purpose is to effectively avoid the marine plant cultivation device that the suspended reef body floats up and down violently due to large wave fluctuations, resulting in damage to the seaweed attached to the algae reef.

The technical scheme of the utility model is:

A marine plant breeding device includes a buoyancy device, a main body rod, several algae reef supports and connecting ropes; For the algae reef attachment base on the hemispherical support frame, the lower end of the connecting vertical sleeve is located below the hemispherical support frame, and the upper end of the connecting vertical sleeve is located above the hemispherical support frame; one end of the main rod is provided with a limit A stopper, the other end is provided with a thread and a lock nut is provided on the thread; each algal reef support body is respectively sleeved on the main body rod through a connecting vertical sleeve, and each algal reef support body is distributed along the main body rod in sequence; The main body rod and each algae reef support are suspended below the buoyancy device through a connecting rope, one end of the connecting rope is connected to the buoyancy device, and the other end is connected to the end of the main body rod near the lock nut; the buoyancy device includes an airbag bag and a central vertical sleeve, the central vertical sleeve is set in the middle of the airbag bag, and the upper and lower ends of the central vertical sleeve respectively pass through the airbag bag and are located outside the airbag bag, the airbag bag and the central vertical sleeve There is a sealed connection between the outer sides of the vertical sleeve; the top of the central vertical sleeve is located above the airbag bag and is provided with a rope storage box with an upper end opening. A suspension rope and a float are placed in the rope storage box, and the float is located on the top of the suspension. Above the rope, one end of the suspension rope is fixed on the buoy, and the other end is fixed on the bottom of the rope storage box.

The algae reef support body of this scheme is suspended in the water area through the buoyancy device, and the depth of the algae reef support body suspension can be controlled by adjusting the length of the connecting rope, and the algae reef support body can be multiplied in the middle, middle and upper layers of the water area, and the water area resources can be fully utilized.

On the other hand, when the algal reef management staff encounters a strong wind warning and there may be large waves above level 5 or 6 on the sea, the algal reef management personnel can discharge the gas in the air bag in advance, so that the buoyancy device and the algal reef support can be lowered. Sink to the bottom of the sea, thereby effectively avoiding the severe fluctuation of the suspended reef body due to the large wave fluctuation, which will cause the destruction of the seaweed attached to the algae reef. When the algae reef support body sinks, the floater of this scheme will drive the sling to float together; in this way, when the waves recede, the algae reef management personnel can easily lift the buoyancy device, the algae reef support body and the objects on it through the sling The algae are pulled up together, and the air bag is inflated again, so that the entire algae reef floats in the sea again, thereby restoring the algae field.

As a preference, an annular protrusion is provided in the middle of the inner surface of the rope storage box, and the rope storage box located above the annular protrusion is a conical box with a cross-section gradually increasing from bottom to top, the float is in the shape of a truncated cone, and the float It is placed in the conical box above the annular protrusion, and the upper port of the conical box is sealed. The float of this proposal can not only be used as a device for providing buoyancy, but also can be used as a top cover to prevent the suspension rope from being exposed to wind and sun.

Preferably, several drainage holes are provided on the bottom surface of the conical box.

Preferably, the buoyancy device further includes a wave avoidance fuze device arranged in the central vertical sleeve, the central vertical sleeve is arranged in the middle of the airbag bag, and the upper and lower ends of the central vertical sleeve pass through the airbag respectively The bag is located outside the airbag bag, and the airbag bag is sealed and connected to the outer surface of the central vertical sleeve; the central vertical sleeve is cylindrical, and the upper and lower ends of the central vertical sleeve are closed; The wave avoidance fuze device includes an upper piston body and a lower piston body arranged in the central vertical sleeve which can slide along the central vertical sleeve, and a connecting rod connecting the upper and lower piston bodies, coaxially arranged on the lower piston body The lead-out rod on the top is set on the inner side of the central vertical sleeve and communicates with the airbag bag, and the outer vent hole is set on the inner side of the central vertical sleeve and is located above the airbag bag; On the inner side of the central vertical sleeve, there is a limit protrusion located below the lower piston body. The lead-out rod is located below the lower piston body, and the lower end of the lead-out rod extends downward and passes through the central vertical sleeve. The end face is located outside the central vertical sleeve; the lead-out rod is covered with a first compression spring that can move the upper and lower piston bodies upward and make the upper piston body abut the inner top surface of the central vertical sleeve ; The distance between the inner and outer two exhaust holes along the axial direction of the central vertical sleeve is smaller than the distance between the upper and lower piston bodies, and when the lower end of the lower piston body abuts against the limit projection , the inner exhaust hole is located between the upper and lower piston bodies, and the outer exhaust hole is located above the upper piston body; when the upper piston body is against the inner top surface of the central vertical sleeve, both the inner and outer exhaust holes are located Between the upper and lower piston bodies; the end of the connecting rope connected with the buoyancy device is fixed at the lower end of the lead-out rod.

The wave-avoidance fuze device of this program is in the case of large waves, such as 5-level waves and 6-level waves (wave height 2 to 6 meters), at this time, under the action of waves, the buoyancy device will drive the algae reef support and its The seaweed on the algae fluctuates violently up and down, causing the seaweed attached to the algae reef support to be torn off and destroyed; while the algae reef of this plan is in the case of large waves, the wave avoidance fuze device can partly discharge the gas in the air bag , so that the buoyancy of the buoyancy device is less than the sum of the gravity of the buoyancy device and each algal reef support body, and the buoyancy device and each algae reef support body are sunk to the bottom of the sea, thereby effectively avoiding the large wave fluctuations that make the suspended algae reef support body The ups and downs fluctuate violently, which causes the algae attached to the support body of the algal reef to be destroyed.

Preferably, each hemispherical support frame protrudes toward the limit block of the main rod, and the algae reef attachment base is fixed on the inner side of the hemispherical support frame.

Since the algae reef attachment base is fixed on the inner surface of the hemispherical support frame; the hemispherical support structure can build a relatively stable small environment, which is conducive to the reproduction of shellfish and algae, and can also be inoculated with corresponding shellfish and other organisms before being put into sea areas. , contributing to a rapid increase in species abundance. On the other hand, the hemispherical support structure can increase the utilization rate of seawater surface area per unit, and the algae strains are fixed on the concave surface inclined or vertically, imitating the environment of steep seabed rocks and reefs, which is conducive to the growth of algae.

Preferably, artificially cultivated seaweed seedlings are attached to the algae reef attachment base block, on the side facing the center of the hemispherical support frame.

Preferably, the top of the air bag is provided with an inflation nozzle.

The beneficial effects of the utility model are:

Firstly, the suspension depth of the algae reef support body can be controlled by adjusting the length of the connecting rope, so as to proliferate in the middle, upper-middle or lower-middle layers of the water area and make full use of the water area resources.

Second, it can effectively avoid the destruction of the seaweed attached to the algae reef due to the large wave fluctuations that cause the suspended reef body to fluctuate violently up and down.

Third, it can build a relatively stable small environment, which is conducive to the reproduction of shellfish; and can increase the utilization rate of unit seawater surface area, imitating the environment of steep seabed rocks and reefs, which is conducive to the growth of seaweed.

Description of drawings

Fig. 1 is a schematic structural view of a marine plant cultivating device of the present invention.

Fig. 2 is a schematic structural view of the algae reef support body of the present invention.

Fig. 3 is a structural schematic diagram of the buoyancy device in Fig. 1 .

Fig. 4 is a structural schematic diagram of a certain state of a marine plant cultivating device of the present invention in the process of encountering waves.

Fig. 5 is a structural schematic diagram of the buoyancy device in Fig. 4 .

Fig. 6 is a schematic diagram of a practical application of a marine plant cultivation device of the present invention after it is put into the sea.

Fig. 7 is a schematic diagram of another practical application of a marine plant cultivating device of the present invention after it is put into the sea.

In the figure: buoyancy device 1; central vertical sleeve 2; air bag 3, inflation nozzle 31; connecting rope 4; rope storage box 5, sling 51, float 52; main rod 6, lock nut 61, limit position Stopper 62; algae reef support body 7, hemispherical support frame 71, connecting vertical sleeve 72, algae reef attachment base block 73; wave avoidance fuze device 8, outer vent hole 81, upper piston body 82, inner vent hole 83 , Connecting rod 84, lower piston body 85, limit protrusion 86, first compression spring 87, lead-out rod 88; fixed pile 11; traction rope 12; connecting floating body 13; anchor rope 14; anchor 15.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment the utility model is described in further detail:

As shown in FIGS. 1 and 2 , a marine plant culture device includes a buoyancy device 1 , a main rod 6 , several algae reef supports 7 and connecting ropes 4 . There are three algae reef supports in this embodiment. The algal reef support body includes a hemispherical support frame 71, a connecting vertical sleeve 72 fixed in the middle of the hemispherical support frame and several algal reef attachment bases 73 arranged on the hemispherical support frame. The algae reef attachment base block is fixed on the inner side of the hemispherical support frame. Artificially cultivated seaweed seedlings are attached to the side surface of the algal reef attachment base block facing the center of the hemispherical support frame. The lower end of the vertical sleeve is located below the hemispherical support frame, and the upper end of the vertical sleeve is located above the hemispherical support frame. One end (ie, the upper end) of the main body rod is provided with a limit block 62 , and the other end (ie, the lower end) is provided with threads and a locking nut 61 is provided on the threads. Each algae reef support body is respectively sleeved on the main body rod through the connecting vertical sleeve, and each algae reef support body is sequentially distributed along the main body rod member. Each hemispherical support frame protrudes toward the direction of the limit stop of the main rod. The main rod and each algae reef supporting body are suspended below the buoyancy device through connecting ropes.

As shown in Fig. 1 and Fig. 3, the buoyancy device 1 includes an air bag 3, a central vertical sleeve 2 and a wave avoidance fuze device 8 arranged in the central vertical sleeve. The top of the airbag bag is provided with an inflation nozzle 31 . The central vertical sleeve is arranged in the middle of the airbag bag, and the upper and lower ends of the central vertical sleeve respectively pass through the airbag bag and are located outside the airbag bag. The air bag is airtightly connected to the outer side of the central vertical sleeve. The central vertical sleeve is cylindrical, and the upper and lower ends of the central vertical sleeve are closed.

The top of the central vertical sleeve is positioned above the airbag bag and is provided with a rope storage box 5 with an upper end opening. A suspension rope 51 and a float 52 are placed in the rope storage box, and the float is positioned above the suspension rope. The buoyancy of the float is greater than the gravity of the sling. The sling is a light high-strength rope; for example, a high-strength nylon rope, 0.5 mm to 2 mm ordinary strength or high-strength steel wire, etc.; and the surface of the sling is coated with a waterproof coating. An annular protrusion is provided in the middle of the inner side of the rope storage box, and the rope storage box above the annular protrusion is a tapered box with a cross-section gradually increasing from bottom to top. The float is in the shape of a truncated cone, and the float is placed in the conical box above the annular protrusion, and seals the upper port of the conical box. A plurality of drainage holes are arranged on the bottom surface of the conical box body. One end of the suspension rope is fixed on the float, and the other end is fixed on the bottom of the rope storage box.

The wave avoidance fuze device 8 includes an upper piston body 82 and a lower piston body 85 arranged in the central vertical sleeve which can slide along the central vertical sleeve, and a connecting rod 84 connecting the upper and lower piston bodies, which is coaxially arranged on the lower piston body. The lead-out rod 88 on the piston body is arranged on the inner side of the central vertical sleeve and communicates with the inner exhaust hole 83 of the airbag bag and is arranged on the inner side of the central vertical sleeve and is positioned at the outer side of the airbag bag. Vent 81. The outer exhaust hole is a through hole. The outer vent is located under the rope storage box. Sealing rings are respectively arranged on the sides of the upper piston body and the lower piston body. A limit projection 86 is provided on the inner side of the central vertical sleeve and below the lower piston body. The lead-out rod is located below the lower piston body, and the lower end of the lead-out rod extends downward, passes through the lower end surface of the central vertical sleeve, and is located outside the central vertical sleeve. A rod passing hole corresponding to the lead-out rod is provided on the lower end surface of the central vertical sleeve. The lower end of the lead-out rod passes through the rod through hole and is located below the central vertical sleeve. The first compression spring 87 that can move the upper and lower piston bodies upward and make the upper piston body lean against the inner top surface of the central vertical sleeve is sheathed on the lead-out rod. The first compression spring is located between the lower piston body and the inner bottom surface of the central vertical sleeve, the upper end of the first compression spring leans against the lower piston body, and the lower end leans against the inner bottom surface of the central vertical sleeve. The distance between the inner and outer exhaust holes along the axial direction of the central vertical sleeve is smaller than the distance between the upper and lower piston bodies. When the lower end of the lower piston body abuts against the limit bump, the inner exhaust hole is located between the upper and lower piston bodies, and the outer exhaust hole is located above the upper piston body; when the upper piston body is against the central vertical sleeve When the inner top surface is used, the inner and outer exhaust holes are located between the upper and lower piston bodies.

As shown in Figure 1, one end of the connecting rope 4 is connected to the buoyancy device, the other end is connected to the end of the main body rod close to the lock nut, and the end of the connecting rope connected to the buoyancy device is fixed on the lower end of the lead-out rod ; One end (ie, the upper end) of the connecting rope is connected to the lower end of the lead-out rod, and the other end (ie, the lower end) is connected to the end of the main body rod close to the locking nut. When each algal reef supporting body is suspended below the buoyancy device, the lower end of the lower piston body leans against the limiting block. The buoyancy of the buoyancy device is greater than the sum of the gravity of the buoyancy device, the connecting ropes, the main rod and each algae reef support body.

The specific application process of the marine plant breeding device of the present utility model is as follows:

First, as shown in Figure 1, the whole marine plant cultivation device is lowered into the water area, and the main rod and each algae reef support body 7 are suspended in the water area through the buoyancy device 1 and the connecting rope 4; and can be connected by adjusting The length of the rope is used to control the hanging depth of the algae reef support body, and the middle layer, upper middle layer or lower middle layer of the water area is used for proliferation. The algae reef in this embodiment is suitable for putting in the sea area with a depth of 20 to 100 meters, wherein the length of the connecting rope is generally between 10 and 50 meters; the length of the suspension rope is greater than the depth of the sea area.

As shown in Figure 1 and Figure 3, when the marine plant cultivation device of the present utility model is lowered into the water area, in the case of a calm sea surface (small waves), the rope is connected under the gravity of the algae reef support body 7 In the stretched state, at this moment, the gravity of the algae reef support body 7 will act on the upper and lower piston bodies 82, 85 through the connecting rope 4, thereby overcoming the reset force of the first compression spring 87, so that the lower end of the lower piston body will touch the upper and lower piston bodies. Lean on the limit block 86; at this moment, the inner exhaust hole is positioned between the upper and lower two piston bodies, and the outer exhaust hole is positioned above the upper piston body; the gas in the airbag bag 3 will not be removed, thereby ensuring that the utility model The algae reefs are suspended in the sea and use the middle, upper middle or lower middle layers of the water to proliferate.

As shown in Figure 4 and Figure 5, in the case of large waves, such as 5-level waves and 6-level waves (wave height 2 to 6 meters); since the buoyancy device 1 floats on the sea surface, the buoyancy device will Fluctuates up and down with the waves; when the buoyancy device moves up with the waves, the buoyancy device will drive the main rod and the algae support body 7 to move up together through the connecting rope 4; when the buoyancy device moves up with the waves When moving to the highest position and moving down with the waves, the main rod and the algae reef supports will probably continue to move up under the action of inertia until the algae reef supports reach the highest point (when the buoyancy device moves with the waves In a certain distance of floating down, the algae reef support body may continue to move upward, so that the distance between the buoyancy device 1 and the upper end of the main body rod will be smaller than the length of the connecting rope 4, and the greater the waves, the greater the buoyancy device and the upper end of the main body rod. The fluctuation range of the spacing between them will be larger); thus in this process, the gravity of each algae reef support body 7 cannot act on the upper and lower piston bodies through the connecting rope 4, and at this moment, under the action of the first compression spring 87, the Push the upper and lower piston bodies 82, 85 to move upwards. When the inner and outer exhaust holes 81, 83 are located between the upper and lower piston bodies, part of the gas in the airbag bag 3 will be exhausted from the inner and outer two. The hole is discharged, so that the buoyancy of the buoyancy device is less than the sum of the gravity of the buoyancy device and each algal reef support body; at this time, the buoyancy device 1 and each algae reef support body 7 will sink to the seabed, thereby effectively avoiding the larger wave fluctuations. Each algae reef support body fluctuates violently up and down, causing the seaweed attached to each algae reef support body to be destroyed.

After the lower end of the lower piston body of the marine plant breeding device of the present utility model abuts against the limit bump, the distance between the outer vent hole and the upper piston body at this time will determine how large the algae reef will be in this program. When the waves are high, the wave-avoidance fuze device can discharge part of the gas in the airbag bag, so that the buoyancy device and the algal reef support body sink. As shown in Figure 5, after the lower end of the lower piston body 85 abuts against the limit projection 86, the larger the distance between the outer exhaust hole 83 and the upper piston body 82, the "first compression spring 87 pushes the upper, The lower piston body moves up until the inner and outer exhaust holes are located between the upper and lower piston bodies" - the longer the process takes; The spacing has a sufficiently large fluctuation range (that is, the difference between the length of the connecting rope and the distance between the buoyancy device and the upper end of the main body rod is large enough); The larger the distance between the exhaust hole and the upper piston body, the larger the wave fluctuation amplitude is needed to make the wave avoidance fuze device discharge part of the gas in the air bag.

When encountering small sea waves, although the distance between the buoyancy device and the upper end of the main body rod may fluctuate at this time (that is, the distance between the buoyancy device and the upper end of the main body rod will be less than the length of the connecting rope), the first compression spring Push the upper and lower piston bodies to move upward, but when the upper piston body has not passed the outer vent hole (that is, the outer vent hole has not yet been located between the upper and lower piston bodies), each algae support body Has sunk, the gravity of the algae reef support body will act on the upper and lower piston bodies through the connecting rope again, overcome the reset force of the first compression spring, and make the upper and lower piston bodies move downward, that is to say, when encountering a small When the sea waves are high, it is not enough for the wave avoidance fuze device to discharge part of the gas in the air bag; therefore, after the lower end of the lower piston body abuts against the limit bump, this scheme can control the outer exhaust hole and the upper piston body The distance between them determines how big the sea waves are when the algae reefs of this program run into. The wave avoidance fuze device can discharge part of the gas in the airbag bag; the buoyancy device and the algae reef support body sink. Generally speaking, when encountering large waves of grade 5 and giant waves of grade 6 (wave height 2 to 6 meters), the algae reef support body will fluctuate violently up and down, causing the algae attached to the algae reef support body to be destroyed; When there are 5-level big waves and 6-level huge waves (wave height 2-6 meters), the wave avoidance fuze device of this program can discharge part of the gas in the airbag bag; make the buoyancy device and the algae reef support body sink.

When the algae reef support body sinks, the floater of this scheme will drive the sling to float together; in this way, when the waves recede, the algae reef management personnel can easily lift the buoyancy device, the algae reef support body and the objects on it through the sling The algae are pulled up together, and the air bag is inflated again, so that the entire algae reef floats in the sea again, thereby restoring the algae field.

As shown in Figure 6, when the marine plant culture device of the present utility model is lowered into the water area, each algae reef of the present utility model can be connected with the fixed pile 11 preset in the sea area or near the coast through the traction rope 12 respectively. Connection; one end of the traction rope is connected with the central vertical sleeve located below the airbag bag, and the other end is connected with the fixed pile. Several buoyancy balls are evenly distributed on the traction rope. The fixed pile is a fixed pile fixed in the sea area or near the coast. The fixed piles can correspond to each algae reef one by one, or several algae reefs can correspond to one fixed pile;

As shown in Figure 7, after the marine plant cultivation device of the present invention is lowered into the water area, the algae reef of the present invention can also be limited in a certain sea area by the anchor sinking method. The anchor-sinking method includes a connection floating body 13 floating on the sea surface, an anchor 15, an anchor rope 14 and a traction rope 12; wherein the anchor sinks to the seabed, and the anchor rope connects the anchor with the connection floating body; one end of the traction rope is connected with the connection floating body, The other end is connected to the central upright sleeve located below the airbag bag.

After the marine plant cultivating device of the present utility model is lowered into the water area, the algal reef of the present utility model can also be limited in a certain sea area by another anchor sinking method; the anchor rope is fixed at the bottom of the algal reef support Or be fixed on the side of the central vertical sleeve below the airbag bag, and sink the anchor to the seabed, and the length of the anchor rope is greater than the distance between the algae reef support body and the seabed.

Claims (7)

1. A marine plant breeding device, characterized in that it includes a buoyancy device (1), a main rod (6), a number of algae reef supports (7) and connecting ropes (4); the algae reef supports include A hemispherical support frame (71), a connecting vertical sleeve (72) fixed in the middle of the hemispherical The bottom of the support frame, the upper end of the connecting vertical sleeve is located above the hemispherical support frame; one end of the main rod is provided with a limit stop (62), and the other end is provided with a thread and a lock nut (61) is provided on the thread ); each algal reef support body is respectively sleeved on the main body rod through the connecting vertical sleeve (72), and each algal reef support body is distributed along the main body rod in sequence; the main body rod and each algal reef support body are Suspended below the buoyancy device, one end of the connecting rope is connected to the buoyancy device, and the other end is connected to the end of the main body rod close to the lock nut; The buoyancy device includes an air bag (3) and a central vertical sleeve (2), the central vertical sleeve is arranged in the middle of the air bag, and the upper and lower ends of the central vertical sleeve respectively pass through the air bag , and located on the outside of the airbag bag, the airbag bag is sealed and connected to the outer surface of the central vertical sleeve; the top of the central vertical sleeve is located above the airbag bag and is provided with a rope storage box (5) with an upper end opening, the A suspension rope (51) and a float (52) are placed in the rope storage box, and the float is positioned above the suspension rope. One end of the suspension rope is fixed on the float, and the other end is fixed at the bottom of the rope storage box. 2. A marine plant breeding device according to claim 1, wherein an annular protrusion is provided on the inner side of the rope storage box, and the rope storage box located above the annular protrusion has a cross-section from bottom to bottom. On the tapered box that gradually increases, the float is in the shape of a truncated cone, and the float is placed in the tapered box above the annular protrusion and seals the upper port of the tapered box. 3. A marine plant cultivating device according to claim 2, wherein a plurality of drainage holes are provided on the bottom surface of the conical box. 4. A marine plant cultivation device according to claim 1, 2 or 3, characterized in that the buoyancy device further includes a wave-avoidance fuze device (8) arranged in the central vertical sleeve, the The central vertical sleeve is cylindrical, and the upper and lower ends of the central vertical sleeve are closed; the wave avoidance fuze device includes an upper The piston body (82), the lower piston body (85), the connecting rod (84) connecting the upper and lower piston bodies, the lead-out rod (88) coaxially arranged on the lower piston body, and arranged on the inner side of the central vertical sleeve The inner exhaust hole (83) connected with the airbag bag and the outer exhaust hole (81) arranged on the inner side of the central vertical sleeve and located above the airbag bag; A limit bump (86) is provided on the side and below the lower piston body, the lead-out rod is located below the lower piston body, and the lower end of the lead-out rod extends downwards, passes through the lower end surface of the central vertical sleeve, and is located on the central vertical sleeve. outside the sleeve; the lead-out rod is set with a first compression spring (87) that can move the upper and lower piston bodies upward and make the upper piston body lean against the inner top surface of the central vertical sleeve; The distance between the inner and outer exhaust holes along the axial direction of the central vertical sleeve is smaller than the distance between the upper and lower piston bodies, and when the lower end of the lower piston body abuts against the limit protrusion, the inner The exhaust hole is located between the upper and lower piston bodies, and the outer exhaust hole is located above the upper piston body; when the upper piston body is against the inner top surface of the central vertical sleeve, the inner and outer two exhaust holes are located Between the two lower piston bodies; the end of the connecting rope connected with the buoyancy device is fixed at the lower end of the lead-out rod. 5. A kind of marine plant cultivating device according to claim 1, 2 or 3, characterized in that, each hemispherical support frame protrudes toward the limit block direction of the main rod, and the algae reef attachment base The block is fixed on the inner side of the hemispherical support frame. 6 . The marine plant culture device according to claim 5 , wherein artificially cultivated seaweed seedlings are attached to the side surface of the algal reef attachment base toward the center of the hemispherical support frame. 7 . 7. A marine plant cultivating device according to claim 1, 2 or 3, characterized in that an inflation nozzle is provided on the top of the air bag.