Self-lodging communication antenna for submersible and operation method thereof

Abstract

The invention relates to a self-lodging communication antenna for a submersible and an operation method of the self-lodging communication antenna. A self-lodging communication antenna for a submersible comprises an antenna mechanism used for communication, and a self-lodging mechanism is installed on the outer side wall face of the antenna mechanism in a matched mode. The self-lodging mechanism structurally comprises a mounting shell, a first mounting hole and a second mounting hole are formed in the mounting shell, and piston assemblies are mounted in the first mounting hole and the second mounting hole at the same time; lug plates extending outwards are symmetrically arranged on the outer wall surface of the second mounting hole, a third mounting hole is formed in each lug plate, rotating shafts are rotationally mounted in the two third mounting holes at the same time, the rotating shafts and the antenna mechanism are mounted in a matched mode through connecting flanges, gears are mounted on the outer circumferential surfaces of the rotating shafts in a matched mode, and the gears and the transmission racks are mounted in an engaged mode; the transmission rack is fixed to the end of the piston assembly. By arranging the self-lodging mechanism, the antenna mechanism is simple in structure and reliable in working performance, and switching between the lodging state and the upright state of the antenna mechanism can be achieved without additionally providing external drive.

Description

Technical Field

[0001] The present invention relates to the technical field of submersibles, and in particular to a self-falling communication antenna for a submersible and an operating method thereof. Background Art

[0002] Submersibles are important equipment for underwater detection and sampling operations. When on the surface, submersibles need to communicate with supporting mother ships or shore-based voice and data via radio or satellite. During communication, the communication antenna needs to be upright and exposed above the water surface. In order to improve the communication power and communication effect, the communication antenna is very long to avoid the attenuation and scattering of wireless signals caused by seawater or near the sea surface. However, when the submersible is diving, the upright communication antenna will cause the size of the submersible to increase significantly, and the communication antenna is prone to collision with the external environment, causing great inconvenience to operations in limited spaces. On the other hand, the upright communication antenna increases the navigation resistance of the submersible, affects the navigation speed of the submersible, and increases energy consumption.

[0003] In the prior art, the following two methods are usually used to avoid the influence of the upright communication antenna on the underwater navigation operation of the submersible:

[0004] One is to manually operate the communication antenna to be in an upright or inverted state. This method requires additional frogmen to operate, which is difficult and dangerous.

[0005] The other is based on the hydraulic principle, which drives the cylinder through the hydraulic system to drive the communication antenna to switch between upright and inverted states. This method requires adding hydraulic oil pipes to connect the hydraulic system on the submersible, which increases the difficulty of the overall layout of the submersible and increases the failure points. In addition, this method also relies on the working reliability of the hydraulic system. Once the hydraulic system fails to operate, the communication antenna cannot be folded, and reliability is difficult to guarantee. Summary of the invention

[0006] In view of the shortcomings in the above-mentioned existing production technology, the applicant provides a self-falling communication antenna for a submersible with a reasonable structure and an operating method thereof. By setting up a self-falling mechanism, the structure is simple and the working performance is reliable. The antenna mechanism can be switched between the falling and upright states without providing an additional external drive, and the state switching is a slow change process, which effectively avoids the vibration of the antenna mechanism.

[0007] The technical solution adopted by the present invention is as follows:

[0008] A self-falling communication antenna for a submersible, comprising an antenna mechanism for communication, wherein the self-falling mechanism is cooperatively mounted on the outer wall surface of the antenna mechanism;

[0009] The structure of the self-falling mechanism is as follows: it comprises a mounting shell, wherein a first mounting hole and a second mounting hole arranged concentrically are provided inside the mounting shell, a piston assembly is installed in the first mounting hole and the second mounting hole at the same time, and a closed air-filled space is formed between the outer wall surface of the piston assembly and the first mounting hole;

[0010] The outer wall surface of the first mounting hole is cooperated with a limit plate for limiting the axial displacement of the piston assembly, the inner diameter of the second mounting hole is smaller than the inner diameter of the first mounting hole, so that a limit step for limiting the axial displacement of the piston assembly is formed between the first mounting hole and the second mounting hole, the outer wall surface of the second mounting hole is symmetrically provided with ear plates extending outward, a third mounting hole is provided on a single ear plate, and a rotating shaft is rotatably installed in the two third mounting holes at the same time, the end of the rotating shaft is provided with a connecting flange, the rotating shaft is installed in cooperation with the antenna mechanism through the connecting flange, a gear is cooperated with the outer circumferential surface of the rotating shaft, the gear is meshed with a transmission rack, and the transmission rack is fixed to the end of the piston assembly;

[0011] The piston assembly performs reciprocating linear motion between the limiting plate and the limiting step, driving the transmission rack to perform reciprocating linear motion, thereby driving the rotating shaft to rotate through the gear, thereby placing the antenna mechanism in an upright state or a lying state.

[0012] As a further improvement of the above technical solution:

[0013] The structure of the piston assembly is as follows: it includes a first cylindrical portion that is mounted in cooperation with a first mounting hole, a second cylindrical portion that extends outwardly is concentrically arranged at the end of the first cylindrical portion, the second cylindrical portion is used to be mounted in cooperation with the second mounting hole, and the diameter of the second cylindrical portion is smaller than the diameter of the first cylindrical portion.

[0014] An air hole for inflating air into the inflation space is arranged on the end surface of the first cylindrical portion, and an air valve is installed in the air hole.

[0015] The structure of the transmission rack is as follows: it includes a connecting cylindrical part for being installed in cooperation with the piston assembly, a rack part extending outward is arranged on a circular surface of the connecting cylindrical part, and the rack part is used for being installed in meshing with the gear.

[0016] An annular groove in an annular shape is provided on the limiting step, and the annular groove is communicated with the inflation space.

[0017] An accommodating groove for accommodating a transmission rack is formed on the inner wall surface of the second mounting hole.

[0018] A plurality of mounting ears are arranged on the outer wall surface of the mounting shell.

[0019] The structure of the antenna mechanism is as follows: it includes a cylindrical outer shell with a hollow interior, a copper rod is installed inside the outer shell, a shielding tube is installed between the outer circumferential surface of the copper rod and the inner wall surface of the outer shell, an end cover is installed at one end of the outer shell, and a watertight socket is installed at the other end of the outer shell, and the watertight socket is electrically connected to the shielding tube and the copper rod at the same time.

[0020] The shielding tube is made of aluminum alloy.

[0021] A method for operating the self-falling communication antenna for a submersible based on the above-mentioned method comprises the following steps:

[0022] S1. Pre-fill the air space inside the mounting shell with compressed air of a certain pressure until the air pressure inside the air space reaches the working pressure P1, so that the piston assembly is close to the end surface of the limit plate under the action of the air pressure inside the air space, and the antenna mechanism is in an upright state;

[0023] S2. When the submersible equipped with the self-falling communication antenna is on the water surface, the air pressure inside the inflatable space is greater than the external water pressure, so that the antenna mechanism is continuously in an upright state, and the antenna mechanism is exposed to the water surface to send and receive radio signals to achieve communication;

[0024] S3. When the submersible equipped with the self-falling communication antenna dives, as the diving depth of the submersible increases, the external water pressure on the piston assembly continues to increase, so that under the push of the water pressure, the piston assembly leaves the end surface of the limit plate and moves linearly away from the limit plate until the piston assembly fits with the end surface of the limit step, thereby driving the gear to rotate through the transmission rack, and the rotating gear drives the rotating shaft to rotate, thereby driving the antenna mechanism to rotate and tilt until the antenna mechanism switches to the falling state;

[0025] S4. When the submersible equipped with the self-inverting communication antenna surfaces, the external water pressure on the piston assembly continues to decrease. When the submersible surfaces to a shallow water area within 10 meters, the piston assembly leaves the end face of the limit step and moves in a straight line away from the limit step under the push of the internal air pressure of the inflation space until the piston assembly and the end face of the limit plate are re-fitted, thereby driving the gear to rotate in the opposite direction through the transmission rack, and the reversely rotating gear drives the rotating shaft to rotate in the opposite direction, thereby driving the antenna mechanism to rotate in the opposite direction and move upright until the antenna mechanism switches to an upright state.

[0026] The beneficial effects of the present invention are as follows:

[0027] The present invention has a compact and reasonable structure and is easy to operate. By arranging a self-falling mechanism, it can realize automatic switching between two states of the antenna mechanism being upright above the water surface when on the water surface and falling down and fitting the submersible when underwater based on changes in the external water pressure of the submersible. The antenna mechanism can be switched between the falling and upright states without providing additional external drive. The structure is simple and compact, the operation is convenient and safe, and the working performance is stable and reliable.

[0028] The present invention provides an operating method, which, during the execution of a mission by a submersible, drives a piston assembly to make corresponding linear motion based on the pressure difference between the water pressure and the air pressure of the inflation space, thereby ensuring that an antenna mechanism can be continuously and slowly switched from an upright state to a lying state or from a lying state to an upright state, avoiding vibration effects on the antenna mechanism, thereby avoiding damage to the antenna mechanism and ensuring communication quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of the present invention.

[0030] Figure 2 It is a structural schematic diagram of the antenna mechanism in the present invention.

[0031] Figure 3 It is an exploded view of the self-lodging mechanism in the present invention.

[0032] Figure 4 It is a schematic diagram of the self-falling mechanism of the present invention when it is in an upright state.

[0033] Figure 5 It is a schematic diagram of the self-lodging mechanism of the present invention when it is in a lodging state.

[0034] Figure 6 It is a schematic diagram of the structure of the installation shell in the present invention.

[0035] Figure 7 for Figure 6 main view.

[0036] Figure 8 for Figure 7 Cross-sectional view of section AA.

[0037] Among them: 1. Antenna mechanism; 2. Self-lodging mechanism; 3. Compensation oil pipe;

[0038] 101, housing; 102, end cover; 103, shielding tube; 104, copper rod; 105, watertight socket; 106, retaining spring;

[0039] 201, mounting shell; 202, rotating shaft; 203, gear; 204, connecting flange; 205, bearing; 206, piston assembly; 207, sealing ring assembly; 208, transmission rack; 209, limiting plate; 210, air valve; 211, first mounting hole; 212, second mounting hole; 213, limiting step; 214, annular groove; 215, accommodating groove; 216, third mounting hole; 217, mounting ear; 218, ear plate;

[0040] 2061, first cylindrical portion; 2062, second cylindrical portion;

[0041] 2081, connecting cylindrical part; 2082, rack part. DETAILED DESCRIPTION

[0042] The specific implementation of the present invention will be described below in conjunction with the accompanying drawings.

[0043] The structure and function of the present invention are as follows:

[0044] like Figure 1-Figure 8 As shown, a self-prostrating communication antenna for a submersible comprises an antenna mechanism 1 for communication, and a self-prostrating mechanism 2 is mounted on the outer wall of the antenna mechanism 1; the structure of the self-prostrating mechanism 2 is as follows: it comprises a mounting shell 201, and a first mounting hole 211 and a second mounting hole 212 arranged concentrically are provided inside the mounting shell 201, and a piston assembly 206 is mounted in the first mounting hole 211 and the second mounting hole 212 at the same time, and a closed air-filled space is formed between the outer wall of the piston assembly 206 and the first mounting hole 211; a limit plate 209 for limiting the axial displacement of the piston assembly 206 is mounted on the outer wall of the first mounting hole 211, and the inner diameter of the second mounting hole 212 is smaller than the inner diameter of the first mounting hole 211, so that a limit plate 209 for limiting the axial displacement of the piston assembly 206 is formed between the first mounting hole 211 and the second mounting hole 212. The outer wall surface of the second mounting hole 212 is symmetrically provided with an ear plate 218 extending outward, and a third mounting hole 216 is provided on a single ear plate 218. The rotating shaft 202 is rotatably installed in the two third mounting holes 216 at the same time. The end of the rotating shaft 202 is provided with a connecting flange 204. The rotating shaft 202 is installed in cooperation with the antenna mechanism 1 through the connecting flange 204. A gear 203 is installed on the outer circumferential surface of the rotating shaft 202. The gear 203 is meshed and installed with a transmission rack 208. The transmission rack 208 is fixed to the end of the piston assembly 206; the piston assembly 206 performs reciprocating linear motion between the limiting plate 209 and the limiting step 213, driving the transmission rack 208 to perform reciprocating linear motion, thereby driving the rotating shaft 202 to rotate through the gear 203, and then the antenna mechanism 1 is in an upright state or a lying state.

[0045] In the present invention, when the piston assembly 206 is in close contact with the limiting plate 209, the antenna mechanism 1 is in an upright state; when the piston assembly 206 is in close contact with the limiting step 213, the antenna mechanism 1 is in a lying state; by providing the gear 203 and the transmission rack 208, the reciprocating linear motion of the piston assembly 206 along its axial direction can be converted into the rotational motion of the rotating shaft 202, with high transmission efficiency, stable transmission performance, strong load-bearing capacity, and the ability to stably realize the switching of the antenna mechanism 1 between the upright state and the lying state.

[0046] The structure of the piston assembly 206 is as follows: it includes a first cylindrical portion 2061 which is mounted in cooperation with the first mounting hole 211, and a second cylindrical portion 2062 which extends outward is concentrically arranged at the end of the first cylindrical portion 2061, and the second cylindrical portion 2062 is used for mounting in cooperation with the second mounting hole 212, and the diameter of the second cylindrical portion 2062 is smaller than the diameter of the first cylindrical portion 2061. In the present invention, when the piston assembly 206 is in close contact with the limiting plate 209, one circular surface of the first cylindrical portion 2061 is in close contact with the limiting plate 209; when the piston assembly 206 is in close contact with the limiting step 213, the other circular surface of the first cylindrical portion 2061 is in close contact with the limiting step 213.

[0047] The piston assembly 206 is sealed with the first mounting hole 211 and the second mounting hole 212 through the sealing ring assembly 207 .

[0048] An air hole for inflating the air-filled space is provided on the end surface of the first cylindrical portion 2061, and an air valve 210 is installed in the air hole. The air valve 210 is used to connect with an external air source. When the air valve 210 is opened, the external air source fills the air-filled space with compressed air; when the air valve 210 is closed, the air leakage in the air-filled space can be effectively avoided.

[0049] The structure of the transmission rack 208 is as follows: it includes a connecting cylindrical portion 2081 for being mounted in cooperation with the piston assembly 206, and a rack portion 2082 extending outward is provided on a circular surface of the connecting cylindrical portion 2081, and the rack portion 2082 is used for meshing and mounting with the gear 203. The circular surface of the cylindrical portion 2081 is in close contact with the circular surface of the second cylindrical portion 2062, and is fixed by connecting bolts, thereby realizing the connection between the transmission rack 208 and the piston assembly 206.

[0050] The limiting step 213 is provided with an annular groove 214, which is connected to the inflation space. By providing the annular groove 214, when the piston assembly 206 is in close contact with the limiting step 213, the gas in the inflation space can be compressed and stored in the annular groove 214; at the same time, the piston assembly 206 can be effectively prevented from locking, thereby improving the working stability of the device.

[0051] The inner wall surface of the second mounting hole 212 is provided with a receiving groove 215 for receiving the transmission rack 208. The rack portion 2082 of the transmission rack 208 is embedded in the receiving groove 215 and can slide along the receiving groove 215. By providing the receiving groove 215, the movement stability of the transmission rack 208 can be improved.

[0052] A plurality of mounting ears 217 are provided on the outer wall surface of the mounting shell 201 , and the communication antenna is fixed to the outer wall surface of the submersible through the mounting ears 217 .

[0053] In the present invention, the rotating shaft 202 is rotatably mounted via the bearing 205 and the corresponding third mounting hole 216 .

[0054] The structure of the antenna mechanism 1 is as follows: it includes a cylindrical and hollow shell 101, a copper rod 104 is installed inside the shell 101, a shielding tube 103 is installed between the outer circumference of the copper rod 104 and the inner wall of the shell 101, an end cap 102 is installed at one end of the outer shell 101, and a watertight socket 105 is installed at the other end of the outer shell 101, and the watertight socket 105 is electrically connected to the shielding tube 103 and the copper rod 104. The shell 101 and the end cap 102 are both made of Peek material, which is wear-resistant and corrosion-resistant, and can effectively protect the shielding tube 103 and the copper rod 104 inside from seawater erosion.

[0055] The end cover 102 is used to prevent seawater from entering the interior of the housing 101. The shielding tube 103 is made of aluminum alloy and can provide electromagnetic shielding to protect the signal transmission sent or received by the copper rod 104 from external electromagnetic interference. The copper rod 104 and the shielding tube 103 are fixed to the interior of the housing 101 by a retaining spring 106, and the retaining spring 106 is made of nylon. The watertight socket 105 is used to realize the electrical connection between the shielding tube 103 and the copper rod 104 and an external power supply.

[0056] A cubic connecting seat is provided on the side wall surface of the outer shell 101 for connecting and fixing with the connecting flange 204; an oil port is provided on the connecting seat, and a compensating oil pipe 3 is installed at the oil port. Hydraulic oil is filled into the inner part of the outer shell 101 through the compensating oil pipe 3, so that the internal pressure and external water pressure of the antenna mechanism 1 can be balanced when the submersible dives, thereby preventing structural damage or performance degradation caused by pressure difference and avoiding damage to the antenna mechanism 1.

[0057] A method for operating the self-falling communication antenna for a submersible based on the above-mentioned method comprises the following steps:

[0058] S1. Compressed air of a certain pressure is pre-filled into the inflatable space inside the mounting shell 201 until the pressure inside the inflatable space reaches the working pressure P1, so that the piston assembly 206 is in close contact with the end surface of the limit plate 209 under the action of the internal air pressure of the inflatable space, and the antenna mechanism 1 is in an upright state;

[0059] S1.1. Compressed air can be charged into the inflation space through the air valve 210;

[0060] S1.2. Working pressure P1>10bar, which shall be adjusted according to the mission requirements of the submersible;

[0061] S2. When the submersible equipped with the self-falling communication antenna is on the water surface, the air pressure inside the inflatable space is greater than the external water pressure, so that the antenna mechanism 1 is continuously in an upright state, and the antenna mechanism 1 is exposed to the water surface to send and receive radio signals to achieve communication;

[0062] S3. When the submersible equipped with the self-falling communication antenna dives, as the diving depth of the submersible increases, the external water pressure on the piston assembly 206 continues to increase, so that under the push of the water pressure, the piston assembly 206 leaves the end surface of the limit plate 209 and moves linearly away from the limit plate 209 until the piston assembly 206 fits with the end surface of the limit step 213, thereby driving the gear 203 to rotate through the transmission rack 208, and the rotating gear 203 drives the rotating shaft 202 to rotate, thereby driving the antenna mechanism 1 to rotate and tilt until the antenna mechanism 1 switches to the falling state;

[0063] S4. When the submersible equipped with the self-inverting communication antenna surfaces, the external water pressure on the piston assembly 206 continues to decrease. When the submersible surfaces to a shallow water area within 10 meters, the piston assembly 206 leaves the end face of the limit step 213 and moves linearly away from the limit step 213 under the push of the internal air pressure of the inflation space until the piston assembly 206 re-fits with the end face of the limit plate 209, thereby driving the gear 203 to rotate in the opposite direction through the transmission rack 208. The reversely rotating gear 203 drives the rotating shaft 202 to rotate in the opposite direction, thereby driving the antenna mechanism 1 to rotate in the opposite direction and erecting, until the antenna mechanism 1 switches to an upright state.

[0064] The above description is an explanation of the present invention, not a limitation of the present invention. The scope of the present invention is defined in the claims. Any form of modification may be made within the scope of protection of the present invention.

Claims

1. A self-falling communication antenna for a submersible, characterized in that: It comprises an antenna mechanism (1) for communication, wherein a self-falling mechanism (2) is mounted on the outer wall surface of the antenna mechanism (1); The structure of the self-falling mechanism (2) is as follows: it comprises a mounting shell (201), the mounting shell (201) is provided with a first mounting hole (211) and a second mounting hole (212) arranged concentrically, a piston assembly (206) is installed in both the first mounting hole (211) and the second mounting hole (212), and a closed air-filled space is formed between the outer wall surface of the piston assembly (206) and the first mounting hole (211); The outer wall surface of the first mounting hole (211) is matched with a limit plate (209) for limiting the axial displacement of the piston assembly (206); the inner diameter of the second mounting hole (212) is smaller than the inner diameter of the first mounting hole (211), so that a limit step (213) for limiting the axial displacement of the piston assembly (206) is formed between the first mounting hole (211) and the second mounting hole (212); the outer wall surface of the second mounting hole (212) is symmetrically provided with an outwardly extending ear plate (218); a single ear plate (218) A third mounting hole (216) is provided on the top, and a rotating shaft (202) is rotatably mounted in the two third mounting holes (216) at the same time. The end of the rotating shaft (202) is provided with a connecting flange (204). The rotating shaft (202) is mounted in cooperation with the antenna mechanism (1) through the connecting flange (204). A gear (203) is mounted in cooperation with the outer circumferential surface of the rotating shaft (202). The gear (203) is meshed with a transmission rack (208). The transmission rack (208) is fixed to the end of the piston assembly (206); The piston assembly (206) performs reciprocating linear motion between the limiting plate (209) and the limiting step (213), driving the transmission rack (208) to perform reciprocating linear motion, thereby driving the rotating shaft (202) to rotate through the gear (203), thereby placing the antenna mechanism (1) in an upright state or an inverted state.

2. The self-falling communication antenna for a submersible according to claim 1, characterized in that: The structure of the piston assembly (206) is as follows: it includes a first cylindrical portion (2061) which is mounted in cooperation with a first mounting hole (211); a second cylindrical portion (2062) extending outward is coaxially arranged at the end of the first cylindrical portion (2061); the second cylindrical portion (2062) is used for mounting in cooperation with a second mounting hole (212); and the diameter of the second cylindrical portion (2062) is smaller than the diameter of the first cylindrical portion (2061).

3. The self-falling communication antenna for a submersible according to claim 2, characterized in that: An air hole for inflating air into the inflation space is provided on the end surface of the first cylindrical portion (2061), and an air valve (210) is installed in the air hole.

4. The self-falling communication antenna for a submersible according to claim 1, characterized in that: The transmission rack (208) has the following structure: it comprises a connecting cylindrical portion (2081) for being mounted in cooperation with the piston assembly (206); a rack portion (2082) extending outward is arranged on a circular surface of the connecting cylindrical portion (2081); and the rack portion (2082) is used for being mounted in meshing engagement with the gear (203).

5. The self-falling communication antenna for a submersible according to claim 1, characterized in that: The limiting step (213) is provided with an annular groove (214) in the shape of an annulus, and the annular groove (214) is communicated with the inflation space.

6. The self-falling communication antenna for a submersible according to claim 1, characterized in that: An accommodating groove (215) for accommodating the transmission rack (208) is provided on the inner wall surface of the second mounting hole (212).

7. The self-falling communication antenna for a submersible according to claim 1, characterized in that: A plurality of mounting ears (217) are arranged on the outer wall surface of the mounting shell (201).

8. The self-falling communication antenna for a submersible according to claim 1, characterized in that: The structure of the antenna mechanism (1) is as follows: it comprises a cylindrical outer shell (101) with a hollow interior, a copper rod (104) being mounted inside the outer shell (101), a shielding tube (103) being mounted between the outer circumferential surface of the copper rod (104) and the inner wall surface of the outer shell (101), an end cover (102) being mounted on one end of the outer shell (101), and a watertight socket (105) being mounted on the other end of the outer shell (101), and the watertight socket (105) being electrically connected to the shielding tube (103) and the copper rod (104) at the same time.

9. The self-falling communication antenna for a submersible according to claim 8, characterized in that: The shielding tube (103) is made of aluminum alloy.

10. An operating method based on the self-falling communication antenna for a submersible according to claim 1, characterized in that: The steps include: S1. Compressed air of a certain pressure is pre-filled into the inflation space inside the mounting shell (201) until the pressure of the internal air pressure of the inflation space reaches the working pressure P1, so that the piston assembly (206) is closely attached to the end surface of the limit plate (209) under the action of the internal air pressure of the inflation space, and the antenna mechanism (1) is in an upright state; S2. When the submersible equipped with the self-falling communication antenna is located on the water surface, the air pressure inside the inflatable space is greater than the external water pressure, so that the antenna mechanism (1) is continuously in an upright state, and the antenna mechanism (1) is exposed to the water surface to send and receive radio signals, thereby achieving communication; S3. When the submersible equipped with the self-falling communication antenna dives, as the diving depth of the submersible increases, the external water pressure on the piston assembly (206) continues to increase, so that under the push of the water pressure, the piston assembly (206) leaves the end surface of the limit plate (209) and moves linearly away from the limit plate (209) until the piston assembly (206) fits with the end surface of the limit step (213), thereby driving the gear (203) to rotate through the transmission rack (208), and the rotating gear (203) drives the rotating shaft (202) to rotate, thereby driving the antenna mechanism (1) to rotate and tilt, until the antenna mechanism (1) switches to the falling state; S4. When the submersible equipped with the self-falling communication antenna surfaces, the external water pressure on the piston assembly (206) continues to decrease. When the submersible surfaces to a shallow water area within 10 meters, the piston assembly (206) leaves the end face of the limit step (213) and moves linearly away from the limit step (213) under the push of the internal air pressure of the inflation space until the piston assembly (206) and the end face of the limit plate (209) are re-fitted, thereby driving the gear (203) to rotate in the opposite direction through the transmission rack (208), and the gear (203) rotating in the opposite direction drives the shaft (202) to rotate in the opposite direction, thereby driving the antenna mechanism (1) to rotate in the opposite direction and move upright, until the antenna mechanism (1) switches to an upright state.

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