CN115649401A - Telescopic diving landing boat - Google Patents

Abstract

A telescopic diving landing boat comprises a cockpit 1, a front passenger cabin 2, a ring-shaped piston 3, a ring-shaped hydraulic cylinder 4, a rear passenger cabin 5 and a power cabin 6, wherein the ring-shaped piston 3 can move back and forth in the ring-shaped hydraulic cylinder 4 to drive the front passenger cabin 2 to move back and forth, so that the volume and the specific gravity of the boat are changed to achieve the purpose of sinking and floating of a submarine, and the telescopic diving landing boat has the main advantages that: the security is high, simple structure, and the cost is lower, convenient operation, and the cabin capacity is great, and the passenger goes out the cabin fast, can batch production etc. its predominant use is: 1, carrying the built army to launch a sudden landing battle. 2, delivering special fighters or naval land battles to carry out underwater penetration battle on the point targets of the enemy, the harbor and the island. 3, because two sides of its anterior cabin and back cabin all have the observation window, so can be used for developing seabed sightseeing tourism in peace and peace time. 4, because of its high safety, large cabin capacity and low operating cost, it can be used as a means of transport for the movement of personnel and small goods between islands at any sea.

Description

Telescopic diving landing boat

Technical Field

The invention belongs to the field of special ships, and relates to a small submarine which can carry dozens of armed soldiers and 1-2 small-sized walking and fighting vehicles at one time, submerges in water in the whole process, suddenly floats out of the water surface after reaching the beach head or the embankment and the wharf of an enemy, and implements beach-rushing landing or extraordinary landing.

Background

Since the nineteenth century, the modern submarine has been a tool for launching torpedo and missile attacks by using the secrecy of the submarine to enemy, but the structure of the submarine is complicated by the sinking and floating principle, the cost is high, the cabin capacity is small, and the submarine is not suitable for large-scale landing operation. After the 21 st century, in order to meet the needs of local warfare, miniature submarines which can carry 6-8 special fighters, pass through the coast defense line of enemy from the water and launch assault, such as American wet and dry miniature submarines, have appeared, the integral specific gravity of which is similar to that of sea water, the horizontal rudder is used for controlling the sinking and floating depth, the rudder is used for controlling the course, and only the former special fighters are soaked in the water in the boat in the whole course. Two people's speed of a ship or plane under water, voyage, carrying capacity are all very limited, but the cost is very high, do not accord with the requirement of large-scale landing operation.

Disclosure of Invention

The invention aims to provide the telescopic diving landing boat which has the advantages of simple structure, lower manufacturing cost, high safety, larger carrying capacity, shallower draft, good silence and convenient diving and floating operation, is suitable for batch production and meets the requirements of sailing on the army and landing in the sea and initiating a assault attack.

The technical scheme of the invention is that the telescopic diving landing boat comprises a cockpit 1, a front passenger cabin 2, a ring-shaped piston 3, a ring-shaped hydraulic cylinder 4, a rear passenger cabin 5, a power cabin 6, a rudder 7, a horizontal rudder 8 and a propeller 66, and is characterized in that the cockpit 1 made of a steel plate is hemispherical, observation windows 9 are arranged at the front and two sides of the cockpit 1, a steering wheel 11, an operating rod 12, a high-pressure gas cylinder 13, a sonar system and communication equipment are arranged in the cockpit 1, the cockpit 1 and the cylindrical front passenger cabin 2 are connected in a watertight manner, an electric hinge 10 capable of enabling the cockpit 1 to be opened and closed in the side in a rotating manner is arranged at one side of the connection position, pressure bearing rings 14 playing a role of reinforcing ribs are arranged at the inner sides of the front end and the rear end of the front passenger cabin 2 made of the steel plate, a flange plate 15 is welded at the outer side of the rear end, a plurality of connecting holes 57 are arranged on the flange plate 15 at equal distances, a vent pipe 16 is arranged at the front part of the front passenger cabin 2, the top end of the vent pipe 16 is provided with an electromagnetic valve 17, the lower end is provided with a manual gate valve 18, the top of the front cabin is provided with a front cabin door 19, two sides are provided with observation windows 20, the lower part is provided with a front cabin plate 21, a telescopic springboard 22 driven by a gear and a rack is arranged on the front cabin plate 21, a storage cabin 23 is arranged below the front cabin plate, the annular piston 3 consists of a piston body 24 and a piston head 25, the piston body 24 is a cylindrical structure rolled by a steel plate, the outer diameter of the piston body 24 is equal to the outer diameter of the front cabin 2, the outer side of the front end of the piston body is welded with a flange 26, a plurality of connecting holes 57 are formed on the piston body, the lower part inside of the piston body 24 is provided with a telescopic cabin plate 27 which is flush with the front cabin plate 21, the inner side of the piston body 24 is provided with 4 rectangular positioning strips 28 at equal intervals along the circumferential direction, the length of the piston body 24 is equal to the length, the piston head 25 which is welded with the tail end of the piston body 24 is in an annular shape, and the outer circle is fixed with a piston ring 29, the inner circle is fixed with a piston ring 30, the piston head 25 slides back and forth in the annular hydraulic cylinder 4, the annular hydraulic cylinder 4 is composed of a cylindrical outer cylinder body 31 and an inner cylinder body 32 which are rolled by thick steel plates, a reinforcing ring 33 which bears tension is arranged on the outer side of the front end of the outer cylinder body 31, a sealing ring 34 which prevents seawater from entering the cylinder and a limiting ring 35 which prevents the piston head 25 from excessively moving are arranged on the inner side of the outer cylinder body, a reinforcing ring 36 which bears pressure is arranged on the outer side of the front end of the inner cylinder body 32, a limiting ring 37 is arranged on the inner side of the inner cylinder body, a rectangular guide groove 38 which corresponds to the rectangular positioning strip 28 is arranged on the limiting ring 37, a plurality of vent holes 39 which are used for the gas in and out of the cylinder are arranged on the position of the limiting ring 37 of the inner cylinder body 32, the front end of the inner cylinder body 32 is sealed by a front steel plate 40, a front watertight door 41 is arranged on the front steel plate 40, the limiting ring 42 is a circular ring-shaped structure which is made of thick steel plate, the outer diameter of which is slightly larger than the outer diameter of the outer cylinder body 31, a plurality of through connecting holes 57 which are arranged at equal intervals, one side surface of the cylinder body is provided with a circular fixed circular groove 43 and a circular fixed groove 44, the rear end of the outer cylinder body 31 is hermetically embedded in the circular fixed groove 43 bearing tension, the rear end of the inner cylinder body 32 is hermetically embedded in the circular fixed groove 44 bearing pressure, the piston body 24, the piston head 25, the outer cylinder body 31, the inner cylinder body 32 and the positioning ring 42 jointly form a circular hydraulic cylinder 4 which is filled with a hydraulic medium 45, the rear end of the inner cylinder body 32 is sealed by a rear steel plate 46, a rear watertight door 47, the inner cylinder body 32, a front steel plate 40 and a space between the rear steel plates 46 are an equipment compartment 48, the equipment compartment 48 is internally provided with an upper compartment plate 49 and a lower compartment plate 50, the upper compartment plate 49 is flush with a telescopic compartment plate 27 in the piston body 24, an air regeneration device 51, an air conditioning dehumidifier 52 and a power distribution cabinet 53 which are connected with the front cabin and the rear cabin through pipelines are arranged beside the upper compartment plate 49, a track 54 capable of moving left and right is arranged on the lower compartment plate 50, the hydraulic system comprises a trolley 55, storage batteries 56 are all installed on the trolley 55, the trolley 55 with power can move back and forth and stop along a rail 54, two sides of an outer cylinder body 31 are provided with a horizontal rudder 8 for controlling the submarine to submerge in depth and preventing transverse swinging, the outer sides of a front cabin 2 and a rear cabin 5 are provided with rescue balloons 58 of folded packages, one end of the rescue balloon 58 made of nylon cloth coated with glue on the surface is connected through a high-pressure gas cylinder 13, the other end of the rescue balloon is provided with a pressure reducing valve 59, the rear cabin 5 is of a cylindrical steel plate structure, the outer side of the front end of the rear cabin is welded with a flange 60, a plurality of connecting lances 57 are equidistantly arranged on the rescue balloon, a hydraulic system for discharging and pumping in a hydraulic medium 45 through a plurality of round holes 61 in the center of a positioning ring 42 is provided with a hydraulic pipe 62, a hydraulic valve 63, a turbine pump 64, a gear pump 65, a liquid storage tank 67 is installed in the rear cabin 5, a rear cabin board 68 in the rear cabin 5 is flush with an upper cabin board of an equipment cabin 48, the top of the rear cabin 5 is provided with a rear cabin door 69, an observation window 70 on the two side, the rear cabin 5, the rear end of the power cabin 5 is welded with a power cabin 6, a vertical propeller 6, a motor 66 is installed on the outer side of the power cabin 6, and a motor 6.

The operation principle, the manufacturing procedure and the operation of the present invention will be described in detail below. Unlike the principle of modern submarine heaving and load regulation, the present invention utilizes the change of submarine volume to change the specific weight to control the stepless regulation from no-load to load. The structure is three-section, the cockpit 1 and the front passenger cabin 2 are front sections, the annular piston 3, the annular hydraulic cylinder 4 and the equipment cabin 48 are middle sections, and the weight of the middle sections is the largest; the rear cabin 5 and the power cabin 6 form a rear section, the three sections can be manufactured in different workshops respectively, and the required main equipment is a laser cutting machine, a rounding machine, a vertical lathe, a welding machine and the like. After the main bodies of all the component sections are manufactured, the equipment installation called outfitting, the decoration in the boat and the like are also completed in a workshop and then transported to a general assembly workshop, all the sections are connected into a whole through flange plates by high-strength bolts, then signals, control and power cables are connected, the general assembly is completed, and after the test is qualified, the main bodies are transported to the bank by a flat car and hung in water, so that the pilot test can be carried out. The invention can be manufactured in sections in workshops without high-end equipment, does not occupy the scarce wharf and dock resources, and is suitable for production line type mass production.

The working process of the invention is that when the telescopic diving landing boat sails on the water surface, the piston head 25 is tightly attached to the limiting rings 35 and 37, the boat has the largest volume, when the boat is going to submerge, the valve 63 is opened, the annular piston moves towards the stern of the boat under the pressure of seawater, the hydraulic medium 45 filled in the annular hydraulic cylinder 4 is discharged into the liquid storage tank 67 below the rear passenger cabin 5, meanwhile, air enters the space formed in the hydraulic cylinder due to the movement of the piston through the air hole 39 so as to avoid forming vacuum, the adsorption effect is generated along with the movement of the annular piston, the volume of the boat is reduced, the specific gravity is increased, the boat gradually sinks into the water, meanwhile, the position of the track trolley 55 is adjusted so as to respond to the change of the gravity center of the boat, the boat is kept in a horizontal state, at the moment, the air in the boat is also compressed and discharged from the vent pipe 16 so that the normal air pressure is kept in the boat, after the boat body is completely submerged in the water, the dual vent pipe valve is closed, the operating rod 12 can be used for changing the inclination angle of the horizontal rudder 8, and submerging into the deep depth. The invention has the advantages that the center of gravity is arranged in the middle section, the loads of front and rear cabins are configured before sailing, the longitudinal and transverse inclination can be prevented, if the longitudinal and transverse inclination occurs during the sailing, the rail trolley carrying the heaviest equipment, namely the storage battery pack, on the boat can be moved, the center of gravity of the boat is adjusted, and the longitudinal and transverse inclination can be eliminated. During submergence, the submarine may be subjected to the condition of change of seawater temperature and salinity, for example, the seawater temperature at a certain position is higher, so that the density is lower, the buoyancy is smaller, and the submarine falls deeply.

When the submarine sails, the horizontal rudder is pulled to lift the boat to the sea surface, the double valves are opened after the vent pipe is out of water, then the turbo pump 64 with large displacement is started to pump a hydraulic medium into the annular hydraulic cylinder, the volume of the boat is increased, the gravity center of the boat is adjusted at the same time, fresh air is sucked in, and the cabin door can be opened to get out of the cabin after the boat horizontally floats out and the air pressure inside and outside the boat is balanced.

The quality of ship middle section is the biggest, and the focus is also lower, and the great rudder of two limit sizes plays and subtracts the effect of pendulum, so all very steady under the surface of water and under water, and the piston body 24 that links to each other with it because the restriction of four rectangle location strips on it, so can not be at the annular pneumatic cylinder internal rotation when the exogenic action, very steady, cockpit and forecabin are also very steady.

The middle section of the boat is probably positioned at a wave crest or a wave trough when the boat is sailed on the water surface, the strength of the middle section is high, but the connection between the boat and the front section and the rear section is under the action of gravity and wave force and can be subjected to a very large bending moment, if the boat is connected by adopting a welding process for a long time, the connection part can be broken due to metal fatigue.

For a submarine, the safety performance is always the first, once the submarine has a serious accident underwater, the possibility of the survival of passengers is very low, and particularly, the submarine is used for landing operation, underwater transportation and sightseeing tourism, so that the number of ships which move is large, the number of people carried by a single ship is large, and the loss of accidents is very large. The modern submarine has four accidents, namely water seepage of a submarine body, fire in the submarine, rupture of the submarine body and misoperation. The invention has no air and water valve and pipeline for sea, and is a full closed body in water, and the water can not seep as long as the door of the water closet is not damaged. The only part in the ship that probably catches fire is the battery, and they all are in the most firm equipment cabin that two ends all have watertight door to keep apart in the middle part, in case catch a fire, flame and toxic gas also can not spread preceding, back cabin, make the passenger have time to put out the conflagration. The damaged danger of hull all is the single casing, it is easy damaged, when the hull is damaged, the valve of high-pressure gas cylinder 13 should be opened immediately to the driver, high-pressure gas gets into before in the twinkling of an eye, in the lifesaving gasbag 58 of two sides in the back cabin, the lifesaving gasbag expands immediately, produce positive buoyancy, make the hull rise, along with the hull rises, the outside water pressure that the gasbag received reduces, the inflation is more and more big, the positive buoyancy of production is also big more, the hull come-up is also fast more, when the gasbag expands to the biggest, partial gas can be discharged from relief pressure valve 59, make the gasbag can not rise brokenly, until the hull support out the surface of water with the damage, make the passenger flee. As for misoperation, as mentioned above, the diving, floating and normal diving operations of the invention are simple, even if the deep falling danger is met, two operation steps of opening the hydraulic valve 63 and starting the gear pump 65 can be avoided, so that the possibility of accidents caused by misoperation is very small.

The walls and floor of the equipment bay 48 may be provided with fire-resistant insulation.

Limit switches can be mounted on both the stop rings 35, 37.

Can install the little rudder of duck formula overall arrangement formula additional in two sides of passenger cabin 2 in the front.

The tank 67 is of an airtight structure.

The outer surface of the piston body 24 may be covered with a copper sheet capable of preventing marine organisms from attaching.

The hydraulic medium in the annular hydraulic cylinder and the liquid storage tank 67 is corrosion-resistant water.

And a sealing washer is arranged between the butted flange plates.

The track 54 in the equipment bay 48 may be a rack structure with the wheels of the trolley 55 being gears that mate with it.

Small washrooms are arranged at the corners of the front and the rear passenger cabins.

From the above, the advantages of the present invention are:

1. the safety performance is good.

2. Simple structure, low manufacturing cost and use cost.

3. The three sections of the boat can be manufactured in a workshop respectively, the total assembly of the whole boat is very simple, and the boat is suitable for batch production.

4. The operation is simple. No matter fast submergence, floating or buoyancy adjustment, dangerous case elimination and gravity center adjustment are completed by discharging or pumping a proper amount of hydraulic medium in a closed system or moving the trolley.

5. The cabin capacity is large. Because the pressure-resistant shell is not provided with a water tank, air valves and water valves and pipelines which account for about one third of the underwater displacement of the submarine, the capacity of the tank is larger.

6. The underwater navigation performance is better. The underwater displacement and the water surface displacement of the invention are equal, so the underwater resistance is smaller during diving, and the inertia is smaller and the maneuverability is better because no ballast water exists.

7. The draught is shallow. The invention has no ballast water tank, can submerge in a shallow sea area, and can execute the beach rushing and landing tasks because of the increase of volume and the reduction of draft after floating out of the water surface.

8. The speed of the personnel and the equipment is high. After the beach is successfully combated, the cockpit is opened sideways, the electric gangway is extended out, and like a water surface landing boat, personnel and equipment rapidly get out of the cockpit through the gangway.

The process of the present invention for performing a certain parity logon task is described below. The army gathers on a certain beach, drives a plurality of telescopic submarine landing boats on the sea, when being close to the beach, the trolley carrying the storage battery pack in the equipment compartment in the boat moves to the rearmost along the track, the gravity center of the boat also moves backwards, the boat body inclines upwards, the boat bow tilts, the submarine landing boat of the hemispherical boat bow can only go up the beach with the posture, at the moment, the electric hinge is rotated, the cockpit turns to one side, and the army can board the boat after the telescopic diving board falls on the beach. After the troop boards the boat, the gangway board is retracted, the cabin door is closed, the turbine pump is started, the hydraulic medium is pumped into the liquid storage tank, the annular piston moves backwards under the action of the atmospheric pressure to drive the boat bow to be separated from the beach, meanwhile, the propeller rotates reversely, the boat bow returns to the sea, and soldiers can dive into the water and step on the boat for expurgation. Due to the secrecy and the mute performance, when the underwater vehicle approaches to an embankment of an enemy, the enemy does not perceive the embankment, the process of boarding is repeated, the underwater vehicle rapidly leaves the cabin and initiates assault, and as no equipment is attacked, the underwater vehicle can win the battle of sea crossing and landing with less cost.

Drawings

FIG. 1 is a front view of the present invention in water.

Fig. 2 is a front view of the invention in water.

Fig. 3 is a schematic view of the cockpit 1.

Fig. 4 is a sectional view of the forward passenger compartment 2.

Fig. 5 is a sectional view and a side view of the ring type piston 3.

Fig. 6 is a sectional view and a partially enlarged view of the ring type hydraulic cylinder 4.

Fig. 7 is an internal layout view of the equipment bay 48.

Fig. 8 is a cross-sectional view and a side view of the retaining ring 42.

Fig. 9 is a sectional view of the rear passenger compartment 5.

In the drawings, 1 a cockpit, 2 a front passenger compartment, 3 a ring piston, 4 a ring hydraulic cylinder, 5 a rear passenger compartment, 6 a power compartment, 7 a rudder, 8 a rudder, 9 a sight glass, 10 an electric hinge, 11 a steering wheel, 12 an operating rod, 13 a high pressure gas cylinder, 14 a pressure-bearing ring, 15 a flange, 16 a vent pipe, 17 a solenoid valve, 18 a manual gate valve, 19 a front door, 20 a sight glass, 21 a front deck, 22 a retractable jump board, 23 a storage compartment, 24 a piston body, 25 a piston head, 26 a flange, 27 a retractable deck, 28 a rectangular positioning bar, 29 a piston ring, 30 a piston ring, 31 an outer cylinder body, 32 an inner cylinder body, 33 a reinforcing ring, 34 a seal ring, 35 a limit ring, 36 a reinforcing ring, 37 a limit ring, 38 a rectangular guide groove, 39 a vent hole, 40 a front steel plate, 41 a front watertight door, 42 a limit ring, 43, 44 a circular groove, 45 a hydraulic medium, 46 a rear steel plate, 47 a rear watertight door, 48 an equipment compartment, 49 an upper compartment plate, 50 a lower compartment plate, 51 an air regenerating device, 52 an air conditioning dehumidifier, 53 a power distribution cabinet, 54 a track, 55 a trolley, 56 a storage battery, 57 a connecting hole, 58 a life saving air bag, 59 a pressure reducing valve, 60 a flange plate, 61 a circular hole, 62 a hydraulic pipe, 63 a hydraulic valve, 64 a turbo pump, 65 a gear pump, 66 a propeller, 67 a liquid storage tank, 68 a rear compartment plate, 69 a rear compartment door, 70 an observation window.

Detailed Description

A telescopic diving landing boat comprises the following parts: 1, the inner diameter of the semispherical cockpit made of steel plates is 3M, the length of the cabin is 1.5M, and the floor of the cockpit and the majority of the cabin body can be opened sideways. 2, a front passenger cabin, the inner diameter is 3M, the length is 5M, the inner diameter of a flange plate welded on the outer side of the rear end is 3.06M, the outer diameter is 3.3M, and the thickness is 30mm. And 3, a ring-shaped piston with the inner diameter of 3M and the length of a piston head of 3.5M, namely the maximum adjusting length of the landing boat is 3.5M, and a flange plate with the same size as that of the front cabin flange plate is welded and installed on the outer side of the front end of the landing boat. 4, a ring-shaped hydraulic cylinder with the length of 3.8M (including a positioning ring), wherein the outer cylinder body and the inner cylinder body are made of thick steel plates with the yield strength of 1800MPa through a special heat treatment process and can safely bear the pressure in the cylinder with the pressure of 20MPa, the front end (a reinforcing ring) of the ring-shaped hydraulic cylinder is provided with a front steel plate seal, the rear end (the positioning ring) of the ring-shaped hydraulic cylinder is provided with a rear steel plate seal, and the ring-shaped hydraulic cylinder and the inner cylinder body are respectively provided with a watertight door. And 5, a rear cabin with the length of 4M, and a flange plate with the same size is welded and installed at the front end of the rear cabin. 6, the engine compartment, long 2.5M installs rudder system and two 100 kilowatt DC motor in, and one is worked when cruising and is equipped with one, two simultaneous workings when the beach is landed or promptly dodges.

The total length of the telescopic diving landing boat during water surface navigation is 20.3M, the no-load diving duration is 16.8M, the total weight (including equipment in the boat) is 118.7 tons, the maximum load capacity is 20 tons, and 50 armed soldiers and a walking and fighting vehicle with the weight of 8 tons can be carried. The limit submerged depth of the boat is 100 meters, the working submerged depth is 60 meters, and the maximum underwater driving range is 150 kilometers.

Claims (10)

1. The utility model provides a telescopic dive landing boat, by cockpit 1, preceding main cabin 2, ring type piston 3, ring type pneumatic cylinder 4, back main cabin 5, power compartment 6, perpendicular rudder 7 and horizontal rudder 8 constitute characterized by: the cockpit 1 made of steel plates is hemispherical, two front and two sides of the cockpit are provided with observation windows 9, the cockpit is internally provided with a steering wheel 11, an operating rod 12, a high-pressure gas cylinder 13, a sonar system and communication equipment, the cockpit 1 is in watertight connection with the cylindrical front cockpit 2, one side of a connection part is provided with an electric hinge 10 which can enable the cockpit 1 to rotate to open and close on the side, the front and rear inner sides of the front cockpit 2 made of steel plates are both provided with pressure rings 14 which play a role of reinforcing ribs, the outer side of the rear end is welded with a flange plate 15, a plurality of connecting holes 57 are arranged on the flange plate 15 at equal distances, the front part of the front cockpit 2 is provided with a vent pipe 16, the top end of the vent pipe 16 is provided with an electromagnetic valve 17, the lower end of the vent pipe is provided with a manual gate valve 18, the top of the front cockpit is provided with a front cabin door 19, the two sides are provided with the observation windows 20, the front cabin plate 21 is arranged below the front cabin plate 21, and a telescopic springboard 22 driven by gears and racks is arranged on the front cabin plate 21, the lower part is a storage cabin 23, the annular piston 3 consists of a piston body 24 and a piston head 25, the piston body 24 is a cylindrical structure rolled by a steel plate, the outer diameter of the piston body is equal to the outer diameter of the front passenger cabin 2, the outer side of the front end of the piston body is welded with a flange 26 which is provided with a plurality of connecting holes 57, the lower part of the inner part of the piston body 24 is provided with a retractable cabin plate 27 which is flush with the front cabin plate 21, the inner side of the piston body 24 is provided with 4 rectangular positioning strips 28 at equal intervals along the circumferential direction, the length of the rectangular positioning strips is equal to the length of the piston body 24, the piston head 25 which is welded and connected with the tail end of the piston body 24 is annular, the outer circle of the piston head is fixed with a piston ring 29, the inner circle of the piston ring 30 is fixed, the piston head 25 slides back and forth in the annular hydraulic cylinder 4, the hydraulic cylinder 4 consists of a cylindrical outer cylinder body 31 and an inner cylinder body 32 which are rolled by a thick steel plate, the outer side of the front end of the outer cylinder body 31 is provided with a reinforcing ring 33 which bears tension, a sealing ring 34 for preventing seawater from entering the cylinder and a limiting ring 35 for preventing the piston head 25 from moving excessively are arranged at the inner side, a reinforcing ring 36 for bearing pressure is arranged at the outer side of the front end of the inner cylinder body 32, a limiting ring 37 is arranged at the inner side, a rectangular guide groove 38 corresponding to the rectangular positioning strip 28 is arranged on the limiting ring 37, a plurality of vent holes 39 for the gas in and out of the cylinder are arranged at the position of the limiting ring 37 on the inner cylinder body 32, the front end of the inner cylinder body 32 is sealed by a front steel plate 40, a front watertight door 41 is arranged on the front steel plate 40, the positioning ring 42 is a circular ring-shaped structural body made of a thick steel plate, the outer diameter of the circular ring-shaped structural body is slightly larger than the outer diameter of the outer cylinder body 31, a plurality of through connecting holes 57 are equidistantly arranged at the outer edge of the circular ring-shaped connecting hole 57, a circular-shaped groove 43 and a circular-shaped groove 44 are arranged at one side surface of the circular ring-shaped circular-shaped groove, the outer cylinder body 31 is sealed and embedded in the circular-shaped groove 43 for bearing tension, the rear end of the inner cylinder body 32 is sealed and embedded in the circular-shaped groove 44 for bearing pressure-shaped groove, the piston body 24, the piston head 25, the outer cylinder body 31, the inner cylinder body 32 and the positioning ring 42 jointly form an annular hydraulic cylinder 4 which is filled with a hydraulic medium 45, the rear end of the inner cylinder body 32 is sealed by a rear steel plate 46, a rear watertight door 47, the inner cylinder body 32, a front steel plate 40 and a space between the rear steel plate 46 are an equipment cabin 48, an upper cabin plate 49 and a lower cabin plate 50 are arranged in the equipment cabin 48, the upper cabin plate 49 is flush with a telescopic cabin plate 27 in the piston body 24, an air regeneration device 51 connected with a front cabin and a rear cabin through pipelines is arranged beside the upper cabin plate 49, an air conditioner dehumidifier 52 and a power distribution cabinet 53 are arranged on the lower cabin plate 50, a rail 54 capable of moving left and right is arranged on the lower cabin plate, a trolley 55 is arranged on the rail 55, a storage battery pack 56 is arranged on the trolley 55, the trolley 55 with power can move back and forth and back along the rail 54 and stop, horizontal submerged rudders 8 for controlling the submarine to move deeply under water and prevent transverse swinging are arranged on the two sides of the outer cylinder body 31, the outside of forecabin 2 and hind cabin 5 all installs the survival capsule 58 of folding packing, the one end of the survival capsule 58 of nylon cloth made by the surface coating is connected through high-pressure gas cylinder 13, the relief pressure valve 59 is installed to the other end, hind cabin 5 is cylindrical steel sheet structure, the welding of its front end outside has ring flange 60, it has a plurality of connection gift 57 to open equidistantly on it, the hydraulic system that supplies hydraulic medium 45 to discharge and pump through a plurality of round holes 61 at holding ring 42 center, including hydraulic pressure pipe 62, hydraulic pressure valve 63, turbopump 64, gear pump 65, the liquid storage tank 67 is all installed in hind cabin 5, the backseat board 68 in hind cabin 5 flushes with the last deck of equipment compartment 48, the top of hind cabin 5 has the backseat door 69, the second side has observation window 70, the rear end of hind cabin 5 is connected with power compartment 6 welded connection, vertical rudder 7, screw 66, driving motor all installs in the inside and the outside of power compartment 6.

2. The telescopic submarine landing gear according to claim 1, further characterized in that both stop rings 35, 37 are provided with limit switches.

3. The telescopic submarine landing craft according to claim 1, further characterized in that small rudders in a duck layout can be added to the two sides of the front cabin 2.

4. The telescopic submarine according to claim 1, wherein the bulkheads and floor of the equipment bay 48 are equipped with fire insulation.

5. The telescopic submarine landing gear according to claim 1, further characterized in that the outer surface of the piston body 24 is covered with a copper foil capable of preventing the attachment of marine organisms.

6. The telescopic submarine landing gear according to claim 1, further characterized in that the liquid tank 67 is of airtight construction.

7. The telescopic submarine vehicle according to claim 1, wherein the hydraulic medium in the hydraulic cylinder 4 and the tank 67 is corrosion-resistant water.

8. The telescopic submarine landing craft according to claim 1, further characterized in that a sealing gasket is provided between the abutting flanges.

9. The telescopic submarine vehicle according to claim 1, wherein the rails 54 in the equipment bay 48 are rack-and-pinion structures and the wheels of the trolley 55 are gear wheels cooperating therewith.

10. The telescopic dive landing craft according to claim 1, further characterized in that rear corners of the front and rear compartments 2 and 5 have small lavatories.

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