CN115973330A

CN115973330A - Buoy for real-time magnetic detection of deep and open sea based on iridium satellite communication

Info

Publication number: CN115973330A
Application number: CN202211622911.9A
Authority: CN
Inventors: 魏兆强; 任国庆; 江帆; 陈店; 郭新宇; 马昕; 陈朝晖
Original assignee: Ocean University of China
Current assignee: Ocean University of China
Priority date: 2022-12-16
Filing date: 2022-12-16
Publication date: 2023-04-18
Anticipated expiration: 2042-12-16
Also published as: CN115973330B

Abstract

The invention discloses a remote sea real-time magnetic detection buoy based on iridium satellite communication, which comprises a cylindrical box body, wherein a protective cover is fixedly connected above the box body, the protective cover is fixedly connected with the box body through a cover wall, the side wall of the cover wall is slidably connected with a plurality of photovoltaic panels, the photovoltaic panels are arranged in a staggered mode from top to bottom, the outer wall of the box body is symmetrically and fixedly connected with a plurality of radial plates, every two adjacent radial plates are commonly and slidably connected with an arc-shaped expansion plate, an air bag is fixedly connected onto the expansion plate, and the air bag is also fixedly connected with the outer wall of the box body. Has the advantages that: the motor works to drive the rotating shaft to rotate in a reciprocating manner, the piston plate rotates up and down along with the rotating shaft, and the piston plate moves up to pump air at the upper side into the storage cavity due to the existence of the one-way valve; it moves down and takes out the gas in the gasbag to pump chamber inside to make the gasbag shrink, whole device can sink into the sea water, in order to avoid beating the wave and cause the damage.

Description

Buoy for real-time magnetic detection of deep and open sea based on iridium satellite communication

Technical Field

The invention relates to the technical field of magnetic detection, in particular to an iridium satellite communication-based buoy for real-time magnetic detection of deep open sea.

Background

The ocean magnetic field real-time observation has important application value scenes in various aspects such as earth internal structure observation, underwater target identification and the like. The acquisition of the ocean magnetic field map with high resolution in real time can provide effective support for magnetic measurement compensation research, reduce magnetic measurement deviation and improve the credibility of magnetic measurement total field intensity data. The conventional magnetic field measurement is usually carried out in the air and on the ground, the use environment is relatively stable, the situation in the sea is complex, extreme weather conditions such as a tornado and the like easily occur, huge sea waves can be lifted at the moment, and the buoys and devices carried in the buoys are easily destroyed by the sea waves, so that ocean magnetic field observation cannot be carried out continuously.

Disclosure of Invention

The invention aims to solve the problems in the prior art, and provides a long-time-sequence real-time magnetic measurement buoy based on iridium satellite communication and suitable for deep and open sea severe sea conditions. The real-time magnetic measurement system is divided into four parts of power supply, measurement, returning and receiving, measurement is carried out by adopting a fluxgate magnetometer, magnetic measurement data returning is realized by utilizing iridium satellite communication, and observation working time is prolonged by low-power-consumption design.

In order to achieve the purpose, the invention adopts the following technical scheme: the buoy comprises a cylindrical box body, wherein a protective cover is fixedly connected above the box body, the protective cover is fixedly connected with the box body through a cover wall, the side wall of the cover wall is connected with a plurality of photovoltaic panels in a sliding mode, the photovoltaic panels are arranged in a vertically staggered mode, a plurality of radial plates are symmetrically and fixedly connected with the outer wall of the box body, every two adjacent radial plates are jointly connected with an arc-shaped expansion plate in a sliding mode, an air bag is fixedly connected onto the expansion plate, and the air bag is further fixedly connected with the outer wall of the box body;

the utility model discloses a portable air-conditioning unit, including box body, pump chamber inner seal sliding connection have a piston board, the upper end of pump chamber and the equal common fixedly connected with pump pipe of every gasbag, the chamber is stored to the outside lower wall fixedly connected with of box body, store chamber and pump chamber intercommunication.

In the real-time magnetic detection's of deep and open sea buoy based on iridium communication of foretell, all be provided with the check valve on piston plate, the pump trachea, the hole department that storage chamber and pump chamber are connected is provided with the check valve, the direction of switching on of check valve is top-down on the piston plate, the direction of switching on of pump trachea department check valve is from the gasbag flow to the pump chamber, the direction of switching on of storage chamber and pump chamber junction check valve is top-down.

In the deep and open sea real-time magnetic detection buoy based on iridium communication, the storage cavity and each air bag are fixedly connected with an air return pipe together, the air return pipe is provided with an air return valve, the pump air pipe is provided with a pump air valve, the upper end of the pump cavity is fixedly connected with a water inlet pipe, the lower end of the pump cavity is fixedly connected with a water spray pipe, and one ends of the water spray pipe and the water inlet pipe, which are far away from the pump cavity, are directly communicated with the outside.

In the deep and far sea real-time magnetic detection buoy based on iridium satellite communication, the water inlet pipe and the water spray pipe are both provided with advancing valves.

In foretell buoy of the real-time magnetic detection of deep and far sea based on iridium communication, be provided with power component in the box body, power component is connected with the spool, the spool is located the axle center department of box body and upwards runs through to the protecting cover inside, around being equipped with a plurality of haulage ropes on the spool, the one end and the photovoltaic board fixed connection of spool are kept away from to the haulage rope, the one end fixedly connected with reset spring that the photovoltaic board is located the protecting cover, the one end that the photovoltaic board was kept away from to reset spring and the inner wall fixed connection of geing.

In foretell buoy of the real-time magnetic detection of deep and far sea based on iridium communication, power component includes the motor, the inboard upper wall at the box body is fixed to the motor, the output fixedly connected with pivot of motor, the pivot runs through to the pump chamber in, and the sealed rotation of the upper wall of pivot and pump chamber is connected, one section threaded connection that the pivot is located the pump chamber has the thread bush, thread bush fixed connection is at the upper wall of piston plate.

In the deep and open sea real-time magnetic detection buoy based on iridium communication, the part of the winding shaft in the box body is connected with the movable gear in a sliding mode, the movable gear slides up and down relative to the winding shaft, the movable gear synchronously rotates along with the winding shaft, the movable gear is meshed with the driving gear, and the driving gear is fixed on the rotating shaft.

In foretell buoy of real-time magnetic detection of deep and far sea based on iridium communication, the inboard upper wall fixedly connected with of box body can control flexible push rod, the lower extreme and the loose gear connection of push rod, the wall chamber has been seted up to the upper wall of box body, the spool is located the wall intracavity, the partial fixedly connected with of spool is located the wall intracavity has a plurality of baffles, the fixed veneer of wall intracavity wall has a plurality of liquid sacs.

In the deep and far sea real-time magnetic detection buoy based on iridium communication, an annular groove body is formed in the upper wall of the movable gear, the lower end of the push rod is connected inside the groove body of the movable gear in a sliding mode, the telescopic plate is composed of a middle plate sleeve and two branch plates, the branch plates are sleeved in the plate sleeve in a sliding mode, and the two branch plates are fixedly connected with tensioning springs together at one ends, located in the plate sleeve, of the branch plates.

Compared with the prior art, the invention has the advantages that:

1. when the sea surface is in a calm state, the buoy works normally, the box body part floats on the sea surface, the communication antenna and the magnetometer work normally, magnetic field data of the sea are observed and sent to the cloud end through satellite signals, when abnormal conditions such as waves and tides occur on the sea surface, the push rod is controlled to work, so that the movable gear is meshed with the driving gear, then the motor is started to drive the movable gear to rotate, the winding shaft is driven to rotate, the traction rope is wound on the winding shaft, the photovoltaic panel moves towards the protecting cover and is protected, the push rod is started again after the photovoltaic panel finishes moving, so that the movable gear is disengaged from the driving gear, and the photovoltaic panel is kept inside the protecting cover so as to avoid the photovoltaic panel from being damaged by sea waves;

2. the air pumping valve is opened, the motor works to drive the rotating shaft to rotate in a reciprocating mode, the threaded sleeve is further driven to move up and down, the piston plate rotates up and down along with the piston plate, due to the existence of the one-way valve, the pressure intensity of the lower side of the piston plate is reduced when the piston plate moves up, the pressure intensity of the upper side of the piston plate is increased, air on the upper side can be extruded downwards to the lower side, and then the air is pumped into the storage cavity; otherwise, when it moved down, the pressure of upside reduced, and downside pressure increases to take out the gas in the gasbag to pump chamber inside, so relapse can be with the air pump in the gasbag to storing the intracavity, thereby make the gasbag shrink, make the buoyancy of whole device reduce, thereby make whole device can sink into the sea water, in order to avoid beating the wave and cause the damage.

Drawings

Fig. 1 is a schematic structural diagram of a buoy for real-time magnetic detection of deep and open sea based on iridium satellite communication according to the present invention;

FIG. 2 is a top view of a buoy for real-time magnetic detection in deep and open sea based on Iridium communication, with a protective cover removed;

FIG. 3 is an enlarged schematic view of a power assembly part in the buoy for real-time magnetic detection of deep and open sea based on Iridium communication according to the present invention;

fig. 4 is an enlarged schematic view of a telescopic plate in a buoy for real-time magnetic detection of deep and open sea based on iridium satellite communication.

In the figure: the device comprises a box body 1, a protective cover 2, a cover wall 3, a photovoltaic panel 4, a support rod 5, a return spring 6, a radial plate 7, an expansion plate 8, an air bag 9, a pump cavity 10, a piston plate 11, a pump air pipe 12, an air return pipe 13, a pump air valve 14, an air return valve 15, a storage cavity 16, a water spray pipe 17, a water inlet pipe 18, a winding shaft 19, a traction rope 20, a movable gear 21, a motor 22, a rotating shaft 23, a driving gear 24, a push rod 25, a wall cavity 26, a baffle 27, a liquid bag 28 and a thread sleeve 29.

Detailed Description

The following examples are for illustrative purposes only and are not intended to limit the scope of the present invention.

Examples

Referring to fig. 1-4, the buoy for real-time magnetic detection of deep and open sea based on iridium satellite communication comprises a cylindrical box body 1, a protective cover 2 is fixedly connected above the box body 1, the protective cover 2 is fixedly connected with the box body 1 through a cover wall 3, a plurality of photovoltaic panels 4 are slidably connected with the side wall of the cover wall 3, the photovoltaic panels 4 are arranged in a vertically staggered manner, a plurality of radial plates 7 are symmetrically and fixedly connected with the outer wall of the box body 1, an arc-shaped expansion plate 8 is commonly and slidably connected with every two adjacent radial plates 7, an air bag 9 is fixedly connected onto the expansion plate 8, the air bag 9 is also fixedly connected with the outer wall of the box body 1, and the air bag 9 contracts to reduce the buoyancy of the whole device, so that the whole device can sink into sea water to avoid damage to sea wave beating; after the sea waves pass, the gas in the storage cavity 16 can be restored into the air bag 9 by opening the gas return valve 15, so that the air bag 9 is expanded and restored, the whole device floats on the sea surface again, and normal detection and signal receiving and sending work is continued.

The inside fixedly connected with pump chamber 10 of box body 1, sealed sliding connection has a piston plate 11 in the pump chamber 10, and the upper end of pump chamber 10 and every gasbag 9 are equal fixedly connected with a pump trachea 12 jointly, and the outside lower wall fixedly connected with of box body 1 stores the chamber 16, stores chamber 16 and pump chamber 10 intercommunication. The piston plate 11 and the pump air pipe 12 are both provided with one-way valves, the hole where the storage cavity 16 is connected with the pump cavity 10 is provided with the one-way valve, the conduction direction of the one-way valve on the piston plate 11 is from top to bottom, the conduction direction of the one-way valve at the pump air pipe 12 is from the air bag 9 to the pump cavity 10, and the conduction direction of the one-way valve at the connection of the storage cavity 16 and the pump cavity 10 is from top to bottom. When the photovoltaic panel is submerged, firstly, the push rod 25 is controlled to work to enable the movable gear 21 to be meshed with the driving gear 24, then the motor 22 is started to drive the movable gear 21 to rotate, so that the winding shaft 19 is driven to rotate, the traction rope 20 is wound on the winding shaft 19, the photovoltaic panel 4 moves towards the inner portion of the protecting cover 2, the photovoltaic panel 4 is protected, after the photovoltaic panel moves, the push rod 25 is started again to enable the movable gear 21 to be disengaged from the driving gear 24, and the photovoltaic panel 4 is kept inside the protecting cover 2.

The storage cavity 16 and each air bag 9 are fixedly connected with an air return pipe 13 together, the air return pipe 13 is provided with an air return valve 15, the pump air pipe 12 is provided with a pump air valve 14, the upper end of the pump cavity 10 is fixedly connected with an inlet pipe 18, the lower end of the pump cavity 10 is fixedly connected with a spray pipe 17, and one ends, far away from the pump cavity 10, of the spray pipe 17 and the inlet pipe 18 are directly communicated with the outside. The water inlet pipe 18 and the water spray pipe 17 are provided with advancing valves. When whole device need remove, start partial pump gas valve 14 and motor 22, can make the gas in certain department or the gasbag 9 of many places by the pump to storage chamber 16 in, uneven then can make the device skew of buoyancy everywhere of whole device, close the valve of marcing after the pump gas valve this moment, then open motor 22 again and make piston plate 11 reciprocating motion, can be with the water pump income pump chamber 10 of protecting cover 2 top in, then by pump to the external world through spray pipe 17 again, the realization is to the slant promotion of whole device, thereby change its position. It should be noted that the speed of the motor rotating in the forward and reverse directions needs to be controlled to be different, that is, the water flows through the water inlet pipe 18 and the water spraying pipe 17 at different speeds, so that the device can effectively move forward and change positions under the action of the resistance in the water.

Be provided with power component in the box body 1, power component is connected with spool 19, inside spool 19 was located the axle center department of box body 1 and upwards runs through to protecting cover 2, around being equipped with a plurality of haulage ropes 20 on the spool 19, the one end and the photovoltaic board 4 fixed connection of spool 19 were kept away from to haulage rope 20, photovoltaic board 4 was located the one end fixedly connected with reset spring 6 of protecting cover 2, the one end that photovoltaic board 4 was kept away from to reset spring 6 and the inner wall fixed connection of lid wall 3. The power assembly comprises a motor 22, the motor 22 is fixed on the inner upper wall of the box body 1, the output end of the motor 22 is fixedly connected with a rotating shaft 23, the rotating shaft 23 penetrates into the pump cavity 10, the rotating shaft 23 is in sealed and rotating connection with the upper wall of the pump cavity 10, one section of the rotating shaft 23, which is positioned in the pump cavity 10, is in threaded connection with a threaded sleeve 29, and the threaded sleeve 29 is fixedly connected with the upper wall of the piston plate 11. The air pumping valve 14 is opened, the motor 22 works to drive the rotating shaft 23 to rotate in a reciprocating manner, the threaded sleeve 29 is further driven to move up and down, the piston plate 11 rotates up and down along with the threaded sleeve, and due to the existence of the one-way valve, the pressure intensity of the lower side of the piston plate 11 is reduced when the piston plate moves up, the pressure intensity of the upper side is increased, the air on the upper side can be downwards extruded to the lower side and then is pumped into the storage cavity 16; otherwise, when the air bag moves downwards, the pressure on the upper side is reduced, the pressure on the lower side is increased, so that the air in the air bag 9 is pumped into the pump cavity 10, the air in the air bag 9 can be pumped into the storage cavity 16 repeatedly, the air bag 9 is contracted, the expansion plate 8 is driven to move when the air bag is contracted, and the expansion plate 8 generates a protection effect on the air bag 9.

The part of the winding shaft 19 located in the box body 1 is connected with a movable gear 21 in a sliding mode, the movable gear 21 slides up and down relative to the winding shaft 19, the movable gear 21 rotates synchronously with the winding shaft 19, the movable gear 21 is meshed with a driving gear 24, and the driving gear 24 is fixed on a rotating shaft 23. The inboard upper wall fixedly connected with of box body 1 can be controlled flexible push rod 25, and the lower extreme and the loose gear 21 of push rod 25 are connected, and wall chamber 26 has been seted up to the upper wall of box body 1, and spool 19 is located wall chamber 26, and spool 19 is located a plurality of baffles 27 of the part fixedly connected with in wall chamber 26, and the fixed veneer in wall chamber 26 inner wall has a plurality of liquid sacs 28. Annular cell body has been seted up to the upper wall of loose gear 21, and the lower extreme sliding connection of push rod 25 is inside loose gear 21's cell body, and expansion plate 8 comprises the board cover in the middle of and the minute board of both sides, divides the board to slide to cup joint in the board cover, and the common fixedly connected with tensioning spring of one end that two minute boards are located the board cover.

The communication system and the magnetometer are arranged in the box body 1, which is not described in detail for the prior art, when the sea surface is in a calm state, the buoy works normally, the box body 1 partially floats on the sea surface, the communication system and the magnetometer work normally to send the magnetic field condition in the sea to the cloud end through satellite signals, and when abnormal conditions such as waves and tides occur on the sea surface, the device needs to be submerged into the sea water to avoid being damaged by the waves.

When diving, firstly, the working of the push rod 25 is controlled to enable the movable gear 21 to be meshed with the driving gear 24, then the motor 22 is started to drive the movable gear 21 to rotate, so that the winding shaft 19 is driven to rotate, the traction rope 20 is wound on the winding shaft 19, the photovoltaic panel 4 moves towards the protecting cover 2, the photovoltaic panel 4 is protected, the push rod 25 is started again after the photovoltaic panel finishes moving to enable the movable gear 21 to be disengaged from the driving gear 24, and the photovoltaic panel 4 is kept inside the protecting cover 2.

Then the air pumping valve 14 is opened, the motor 22 works to drive the rotating shaft 23 to rotate in a reciprocating manner, the threaded sleeve 29 is further driven to move up and down, the piston plate 11 rotates up and down along with the piston plate, due to the existence of the one-way valve, the pressure intensity of the lower side of the piston plate 11 is reduced when the piston plate moves up, the pressure intensity of the upper side of the piston plate is increased, the air on the upper side can be downwards extruded to the lower side, and then the air is pumped into the storage cavity 16; on the contrary, when the air bag moves downwards, the pressure at the upper side is reduced, the pressure at the lower side is increased, so that the air in the air bag 9 is pumped into the pump cavity 10, the air in the air bag 9 can be pumped into the storage cavity 16 repeatedly, the air bag 9 is contracted, the expansion plate 8 is driven to move when the air bag is contracted, and the expansion plate 8 generates a protection effect on the air bag 9.

The bladder 9 is deflated so that the buoyancy of the entire device is reduced, thereby enabling the entire device to be submerged in the sea to avoid damage to the sea wave flapping.

On the contrary, after the sea wave passes, the gas in the storage cavity 16 can be recovered to the air bag 9 by opening the gas return valve 15, so that the air bag 9 is expanded and recovered, the whole device floats on the sea surface again, and normal detection and signal receiving and sending work can be continuously carried out.

When whole device need remove, start partial pump gas valve 14 and motor 22, can make the gas in certain department or the gasbag 9 of many places by the pump to storage chamber 16 in, uneven then can make the device skew of buoyancy everywhere of whole device, close the valve of marcing after the pump gas valve this moment, then open motor 22 again and make piston plate 11 reciprocating motion, can be with the water pump income pump chamber 10 of protecting cover 2 top in, then by pump to the external world through spray pipe 17 again, the realization is to the slant promotion of whole device, thereby change its position. It should be noted that the speed of the motor rotating in the forward and reverse directions needs to be controlled to be different, that is, the water flows through the water inlet pipe 18 and the water spraying pipe 17 at different speeds, so that the device can effectively move forward and change positions under the action of the resistance in the water.

Although the terms 1 box, 2 cover, 3 cover wall, 4 photovoltaic panel, 5 stay bar, 6 return spring, 7 web, 8 expansion plate, 9 air bag, 10 pump chamber, 11 piston plate, 12 pump tube, 13 air return tube, 14 pump valve, 15 air return valve, 16 storage chamber, 17 water spray tube, 18 water inlet tube, 19 winding shaft, 20 pulling rope, 21 active gear, 22 motor, 23 rotation shaft, 24 driving gear, 25 push rod, 26 wall chamber, 27 baffle plate, 28 liquid bag, 29 thread sleeve and the like are used more herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.

Claims

1. The utility model provides a buoy of real-time magnetic detection of deep open sea based on iridium satellite communication, includes box body (1) of cylinder type, its characterized in that, the top fixedly connected with protecting cover (2) of box body (1), protecting cover (2) are through lid wall (3) fixed connection with box body (1), the lateral wall sliding connection of lid wall (3) has a plurality of photovoltaic boards (4), and is a plurality of photovoltaic board (4) dislocation set from top to bottom, the outer wall symmetry fixedly connected with of box body (1) has a plurality of radials (7), per two adjacent radials (7) sliding connection jointly has a curved expansion plate (8), fixedly connected with gasbag (9) on expansion plate (8), gasbag (9) still with the outer wall fixed connection of box body (1);

pump chamber (10) of the inside fixedly connected with of box body (1), pump chamber (10) inner seal sliding connection has a piston board (11), pump pipe (12) of equal common fixedly connected with of upper end and every gasbag (9) of pump chamber (10), chamber (16) is stored to the outside lower wall fixedly connected with of box body (1), store chamber (16) and pump chamber (10) intercommunication.

2. The buoy for real-time magnetic detection of deep and open sea based on iridium-star communication as claimed in claim 1, wherein the piston plate (11) and the pump air tube (12) are both provided with one-way valves, the one-way valve is arranged at the hole where the storage chamber (16) is connected with the pump chamber (10), the conduction direction of the one-way valve on the piston plate (11) is from top to bottom, the conduction direction of the one-way valve at the pump air tube (12) is from the air bag (9) to the pump chamber (10), and the conduction direction of the one-way valve at the connection of the storage chamber (16) and the pump chamber (10) is from top to bottom.

3. The buoy for real-time magnetic detection of deep and open sea based on iridium communication as claimed in claim 1, wherein the storage chamber (16) and each air bag (9) are fixedly connected with an air return pipe (13) together, the air return pipe (13) is provided with an air return valve (15), the pump air pipe (12) is provided with a pump air valve (14), the upper end of the pump chamber (10) is fixedly connected with an inlet pipe (18), the lower end of the pump chamber (10) is fixedly connected with a spray pipe (17), and the ends of the spray pipe (17) and the inlet pipe (18) far away from the pump chamber (10) are directly communicated with the outside.

4. The buoy for real-time magnetic detection of deep and open sea based on iridium satellite communication in claim 3, wherein the water inlet pipe (18) and the water spray pipe (17) are provided with traveling valves.

5. The buoy for real-time magnetic detection of deep open sea based on iridium satellite communication as claimed in claim 1, wherein a power assembly is provided in the box body (1), the power assembly is connected with a spool (19), the spool (19) is located at the axis of the box body (1) and upwardly penetrates into the protecting cover (2), a plurality of hauling ropes (20) are wound on the spool (19), one end of each hauling rope (20) far away from the spool (19) is fixedly connected with the photovoltaic panel (4), one end of each photovoltaic panel (4) is fixedly connected with a return spring (6) located in the protecting cover (2), and one end of each return spring (6) far away from the photovoltaic panel (4) is fixedly connected with the inner wall of the cover wall (3).

6. The buoy for real-time magnetic detection of deep and open sea based on iridium satellite communication of claim 5, wherein the power assembly comprises a motor (22), the motor (22) is fixed on the inner upper wall of the box body (1), the output end of the motor (22) is fixedly connected with a rotating shaft (23), the rotating shaft (23) penetrates into the pump cavity (10), the rotating shaft (23) is connected with the upper wall of the pump cavity (10) in a sealing and rotating manner, one section of the rotating shaft (23) located in the pump cavity (10) is connected with a threaded sleeve (29) in a threaded manner, and the threaded sleeve (29) is fixedly connected with the upper wall of the piston plate (11).

7. The buoy for real-time magnetic detection of deep and open sea based on iridium communication as claimed in claim 6, wherein the part of the spool (19) located in the box body (1) is slidably connected with a movable gear (21), the movable gear (21) slides up and down relative to the spool (19), the movable gear (21) rotates synchronously with the spool (19), the movable gear (21) is engaged with a driving gear (24), and the driving gear (24) is fixed on a rotating shaft (23).

8. The deep open sea real-time magnetic detection buoy based on iridium satellite communication as claimed in claim 5, characterized in that a push rod (25) capable of being controlled to stretch is fixedly connected to the inner upper wall of the box body (1), the lower end of the push rod (25) is connected with the free gear (21), a wall cavity (26) is formed in the upper wall of the box body (1), the spool (19) is located in the wall cavity (26), a plurality of baffles (27) are fixedly connected to the portion, located in the wall cavity (26), of the spool (19), and a plurality of liquid bags (28) are fixedly glued to the inner wall of the wall cavity (26).

9. The buoy for real-time magnetic detection of deep and far seas based on iridium communication as claimed in claim 8, wherein an annular groove is formed in an upper wall of the movable gear (21), a lower end of the push rod (25) is slidably connected inside the groove of the movable gear (21), the expansion plate (8) is composed of a middle plate sleeve and two side sub plates, the sub plates are slidably sleeved in the plate sleeve, and one ends of the two sub plates located in the plate sleeve are fixedly connected with a tension spring.