A fixing structure and installation method of organic glass manned cabin

Abstract

This invention relates to a fixing structure and installation method for an acrylic manned cabin, comprising an acrylic manned cabin, a carrier frame, and shock absorbers. The bottom of the manned cabin rests on several shock absorbers and is hinged to the frame end connecting ear plates on the carrier frame via end connecting ear plates of the manned cabin. The shock absorbers are fixed to the carrier frame via shock absorber bases, forming a certain angle with each other, and are internally equipped with springs. The shock absorbers and the carrier frame form an integral structure with elasticity at the bottom, which can restrict and constrain the manned cabin in six degrees of freedom, thereby fixing the manned cabin. This not only ensures that the acrylic shell of the manned cabin is subjected to uniform force, but also has shock absorption, limit protection, and height adjustment functions, protecting the safety of the acrylic shell of the manned cabin and the carrier frame.

Description

Technical Field

[0001] This invention relates to the field of manned submersible fixing structure technology, and in particular to a fixing structure and installation method for an acrylic glass manned cabin. Background Technology

[0002] The manned cabin is the heaviest and largest single component in a manned submersible system. It must be able to withstand certain deep-water pressure to ensure the safety of the personnel inside, making it a critical core component of the manned submersible. The assembly and installation method between the manned cabin and the submersible will affect the overall layout of the entire submersible, and in some cases, this impact can even be revolutionary.

[0003] The main structure of the acrylic manned capsule is made of transparent, non-metallic acrylic material. It's impossible to add connecting structures to the surface using welding. The common practice in the acrylic industry is to use adhesives to bond the base material to the substrate, which can be either acrylic or metal components. If metal connecting structures are fixed to the acrylic shell using adhesives, these bonded areas may experience localized high stress concentrations. Under long-term alternating loads, these high-stress areas may develop cracks, threatening the safety of the manned capsule. Acrylic material has low impact toughness; how to cushion the impact load at the moment of the submersible's descent is also a problem that needs to be considered when fixing the acrylic manned capsule. Furthermore, the submersible's carrier frame often uses welded structures, and deformation is inevitable during manufacturing. For the sake of robustness, the manned capsule fixing structure usually lacks height adjustment capabilities. Precise assembly onto the carrier frame often requires extensive on-site adaptation adjustments, resulting in low assembly efficiency. Summary of the Invention

[0004] In response to the practical technical difficulties existing in the assembly design of the acrylic glass passenger cabin in the above-mentioned existing production technology, the applicant provides a fixing structure and installation method for the acrylic glass passenger cabin. The passenger cabin fixing structure of the present invention can not only ensure that the acrylic glass shell of the passenger cabin is uniformly stressed, but also has the functions of shock absorption, limit protection, and height adjustment, thus protecting the safety of the acrylic glass shell and the carrier frame of the passenger cabin. The installation method of the present invention can solve these problems.

[0005] The technical solution adopted in this invention is as follows:

[0006] A fixing structure for an acrylic glass manned cabin includes an acrylic glass manned cabin, a carrier frame, and shock absorbers. The acrylic glass manned cabin is hinged to a frame end connecting ear plate on the carrier frame via a manned cabin end connecting ear plate. Several shock absorbers are installed on the carrier frame, and the bottom of the acrylic glass manned cabin is in contact with several shock absorbers simultaneously. Each shock absorber is installed at an angle, and adjacent shock absorbers form an included angle. The shock absorbers and the carrier frame form an integral structure with elasticity at the bottom, which together restricts and constrains the acrylic glass manned cabin in six degrees of freedom, thereby fixing the acrylic glass manned cabin.

[0007] Its further technical solution lies in:

[0008] The pressure-resistant shell of the acrylic glass manned cabin is made of acrylic glass, and the shape of the acrylic glass manned cabin is cylindrical or spherical.

[0009] The structure of the plexiglass manned cabin includes a manned cabin end connecting lug, a metal sealing structure, and a plexiglass spherical shell. The installation position of the metal sealing structure is adjusted according to the submersible layout. The manned cabin end connecting lug and the metal sealing structure are connected by welding or assembly.

[0010] The carrier frame is divided into a first frame and a second frame. The bottom of the second frame is provided with multiple bases for installing shock absorbers. The bottom of the first frame is welded with a frame end connecting ear plate. The first frame is connected to the second frame through a connecting structure.

[0011] Both the No. 1 and No. 2 frames are constructed by welding pipe fittings.

[0012] The shock absorber adopts an oil-filled structure or a water-permeable structure.

[0013] The shock absorber has the following structure: it includes a base, which is fixed to the carrier frame; an outer cylinder is fixedly installed on the base; an inner cylinder is located inside the outer cylinder; the bottom of the inner cylinder is fixed to the base by fasteners; a spring is fitted around the outside of the inner cylinder; a piston body is installed on the top surface of the inner cylinder by fasteners; the piston body extends out of the outer cylinder and connects to a support head; a protective sleeve is semi-enclosed on the top surface of the support head, and the protective sleeve directly contacts the plexiglass manned cabin; two guide bands and an axial sealing ring are installed between the outer cylinder and the piston body; the side wall of the outer cylinder forms an upper flow channel and a lower flow channel; a blind end is installed at the upper flow channel; and the lower flow channel is connected to an oil compensator through an oil pipe, thereby maintaining internal and external pressure balance.

[0014] The outer cylinder has a frustum-shaped structure.

[0015] The inner cylinder consists of an upper inner cylinder and a lower inner cylinder.

[0016] A method for installing a fixed structure for an acrylic glass manned cabin includes the following steps:

[0017] As a further improvement to the above technical solution:

[0018] Preparation:

[0019] Beforehand, the No. 1 and No. 2 frames were separated, and all connecting parts and fasteners were prepared. The manned cabin end connecting ear plate, metal sealing structure and plexiglass spherical shell were assembled into an plexiglass manned cabin and passed the pressure test, making it ready for installation.

[0020] Secondly, install shock absorbers:

[0021] Install the shock absorber on the base of frame number two, and connect the upper and lower flow channels of the shock absorber to the manual hydraulic pump.

[0022] Then, install the plexiglass manned cabin:

[0023] Lift the acrylic manned cabin and place it on the shock absorber. Then assemble the No. 1 frame and the No. 2 frame into a carrier frame. Observe the relative position of the connecting ear plate at the manned cabin end and the connecting ear plate at the frame end. Use a manual hydraulic pump to inject hydraulic oil into the downward or upward flow channel to correct the height and level of the acrylic manned cabin until the connecting ear plate at the manned cabin end and the connecting ear plate at the frame end are aligned and then insert the connecting pin.

[0024] Finally, oil filling compensation:

[0025] Remove the hydraulic pump from the lower or upper flow channel, drain the hydraulic oil from the upper flow channel, and seal it with a plug. Connect the lower flow channel to the oil compensator via an oil pipe. During submersible maintenance, regularly check the fluid level in the oil compensator and replenish the oil.

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

[0027] This invention has a compact and reasonable structure and is easy to operate. Through the coordinated operation of the carrier frame, the plexiglass manned cabin and the shock absorber, the assembly of the manned cabin can be easily completed, and it has the functions of shock absorption, limit protection and height adjustment.

[0028] In addition, the present invention also has the following advantages:

[0029] (1) When the shock absorber is compressed by the manned cabin, it can provide a certain rebound force, absorb the transient impact energy of the manned cabin, and play a certain role in shock absorption and protection of the organic glass manned cabin.

[0030] (2) The shock absorber is designed with vertical height adjustment function. The position of the connection point of the manned cabin can be adjusted by adjusting the height of the front, rear, left and right shock absorbers, which can make up for the adverse effects of the carrier frame manufacturing error on the installation of the manned cabin.

[0031] (3) The shock absorber is designed with a limit protection function. If the movement of the manned cabin in the five directions of front, back, left, right and down exceeds the set value, the limit protection function of the shock absorber will be automatically triggered to prevent structural damage caused by excessive local stress on the carrier frame.

[0032] (4) The connecting ear plate of the manned cabin makes full use of the metal sealing structure and does not open any installation holes on the plexiglass spherical shell, thus preserving the structural integrity of the plexiglass manned cabin shell to the maximum extent. The whole structure is compact, lightweight and efficient in operation.

[0033] (5) The shock absorber has the functions of shock absorption, limiting, and height adjustment. The spring in the shock absorber can provide a certain rebound force when compressed by the manned cabin, which can absorb the impact energy generated by the manned cabin during instantaneous movement and play a shock absorption role. When the displacement of the manned cabin reaches the set value, the shock absorber's limiting function will be triggered. By limiting the displacement of the manned cabin, the carrier frame can be protected from damage. The outer cylinder side wall is designed with an upper flow channel and a lower flow channel. By injecting hydraulic oil into it, the piston can be driven to move up and down, realizing the manned cabin installation height adjustment function.

[0034] (6) The carrier frame has a simple structure, is easy to manufacture, has low cost and high strength. Attached Figure Description

[0035] Figure 1 It is a structural schematic diagram of the present invention.

[0036] Figure 2 This is the front view of the present invention.

[0037] Figure 3 This is the right view of the present invention.

[0038] Figure 4 This is a schematic diagram of the structure of the organic glass manned cabin of the present invention.

[0039] Figure 5 This is a comparison image of the organic glass manned cabin of the present invention before and after movement.

[0040] Figure 6 This is a schematic diagram of the carrier frame of the present invention.

[0041] Figure 7 This is a schematic diagram of the internal structure of the shock absorber of the present invention (lifted up).

[0042] Figure 8 This is a schematic diagram of the internal structure of the shock absorber of the present invention (in the retracted state).

[0043] The components include: 1. Acrylic glass passenger cabin; 2. Carrier frame; 3. Shock absorbers;

[0044] 101. Connecting ear plate at the end of the manned cabin; 102. Metal sealing structure; 103. Acrylic glass spherical shell.

[0045] 201. Frame No. 1; 202. Connecting structure; 203. Frame No. 2; 204. Base; 205. Frame end connecting lugs;

[0046] 301. Outer cylinder body; 302. Base; 303. Spring; 304. Piston body; 305. Support head; 306. Protective sleeve; 307. Upper flow channel; 308. Lower flow channel; 309. Oil pipe; 310. End cap; 311. Upper inner cylinder body; 312. Lower inner cylinder body; 313. Shaft No. 1 seal ring; 314. Guide belt No. 1; 315. Guide belt No. 2; 316. Shaft No. 2 seal ring; 317. Plane seal. Detailed Implementation

[0047] The specific embodiments of the present invention will now be described with reference to the accompanying drawings.

[0048] like Figures 1-8 As shown, the fixing structure of the plexiglass manned cabin in this embodiment includes a plexiglass manned cabin 1, a carrier frame 2, and shock absorbers 3. The plexiglass manned cabin 1 is hinged to the frame end connecting ear plate 205 on the carrier frame 2 via a manned cabin end connecting ear plate 101. Several shock absorbers 3 are installed on the carrier frame 2. The bottom of the plexiglass manned cabin 1 is in contact with several shock absorbers 3 simultaneously. Each shock absorber 3 is installed at an angle, and an angle is formed between two adjacent shock absorbers 3. The shock absorbers 3 and the carrier frame 2 form an integral structure with elasticity at the bottom, which together restricts and constrains the plexiglass manned cabin 1 in six degrees of freedom, thereby fixing the plexiglass manned cabin 1.

[0049] The pressure-resistant shell of the acrylic manned cabin 1 is made of acrylic material, and the acrylic manned cabin 1 is cylindrical or spherical in shape.

[0050] The structure of the plexiglass manned cabin 1 includes a manned cabin end connecting lug 101, a metal sealing structure 102, and a plexiglass spherical shell 103. The installation position of the metal sealing structure 102 is adjusted according to the arrangement of the submersible. The manned cabin end connecting lug 101 and the metal sealing structure 102 are connected by welding or assembly.

[0051] The carrier frame 2 is divided into a first frame 201 and a second frame 203. The bottom of the second frame 203 is provided with multiple bases 204 for installing shock absorbers 3. The bottom of the first frame 201 is welded with a frame end connecting ear plate 205. The first frame 201 is connected to the second frame 203 through a connecting structure 202.

[0052] Both frame 1 (201) and frame 2 (203) are constructed by welding pipe fittings.

[0053] Shock absorber 3 adopts an oil-filled structure or a water-permeable structure.

[0054] The structure of the shock absorber 3 is as follows: it includes a base 302, which is fixed to the carrier frame 2. An outer cylinder 301 is fixedly installed on the base 302 via a flat seal 317. An inner cylinder is provided inside the outer cylinder 301. The bottom of the inner cylinder is fixed to the base 302 by fasteners. A spring 303 is sleeved on the outside of the inner cylinder. A piston body 304 is installed on the top surface of the inner cylinder via fasteners. The piston body 304 extends out of the outer cylinder 301 and is connected to a support head 305. A protective sleeve is semi-enclosed on the top surface of the support head 305. 306, the protective sleeve 306 is in direct contact with the plexiglass manned cabin 1; two guide belts and axial sealing rings (i.e., No. 1 shaft sealing ring 313, No. 1 guide belt 314, No. 2 guide belt 315 and No. 2 shaft sealing ring 316 respectively) are installed between the outer cylinder 301 and the piston body 304; the side wall of the outer cylinder 301 forms an upper flow channel 307 and a lower flow channel 308, a plug 310 is installed at the upper flow channel 307, and the lower flow channel 308 is connected to the oil compensator through the oil pipe 309, thereby maintaining the internal and external pressure balance.

[0055] The outer cylinder block 301 has a frustum-shaped structure.

[0056] The inner cylinder blocks are divided into an upper inner cylinder block 311 and a lower inner cylinder block 312.

[0057] The installation method of the fixing structure of the plexiglass manned cabin in this embodiment includes the following steps:

[0058] Preparation:

[0059] Beforehand, frame 1 201 and frame 203 are separated, and various connectors and fasteners are prepared. The manned cabin end connecting ear plate 101, metal sealing structure 102 and plexiglass spherical shell 103 are assembled into plexiglass manned cabin 1 and pass the pressure test, and are ready for installation.

[0060] Secondly, install shock absorber 3:

[0061] Install the shock absorber 3 on the base 204 of the second frame 203, and connect the upper flow channel 307 and the lower flow channel 308 of the shock absorber 3 to the manual hydraulic pump.

[0062] Then, install the acrylic glass manned cabin 1:

[0063] Lift the plexiglass manned cabin 1 and place it on the shock absorber 3. Then assemble the first frame 201 and the second frame 203 into the carrier frame 2. Observe the relative position of the manned cabin end connecting ear plate 101 and the frame end connecting ear plate 205. Use a manual hydraulic pump to inject hydraulic oil into the lower flow channel 308 or the upper flow channel 307 to correct the height and level of the plexiglass manned cabin 1 until the manned cabin end connecting ear plate 101 and the frame end connecting ear plate 205 are aligned and then insert the connecting pin.

[0064] Finally, oil filling compensation:

[0065] Remove the hydraulic pump from the lower flow channel 308 or the upper flow channel 307, drain the hydraulic oil from the upper flow channel 307, and seal it with the plug 310. The lower flow channel 308 is connected to the oil compensator through the oil pipe 309. During the maintenance of the submersible, the fluid level in the oil compensator is checked regularly and oil is added.

[0066] The specific structure and function of the organic glass manned cabin fixing structure described in this invention are as follows:

[0067] It mainly includes an organic glass manned cabin 1, a carrier frame 2, and a shock absorber 3.

[0068] Among them, the plexiglass manned cabin 1 is hinged to the frame end connecting ear plate 205 on the carrier frame 2 via the manned cabin end connecting ear plate 101, and the bottom of the plexiglass manned cabin 1 is in contact with several shock absorbers 3.

[0069] Several shock absorbers 3 are arranged at a certain angle to each other. Springs 303 are installed inside the shock absorbers 3. The shock absorbers 3 are connected to the base 204 on the second frame 203. The shock absorbers 3 and the carrier frame 2 form an integral structure with elasticity at the bottom, which can restrict and constrain the acrylic glass manned cabin 1 in six degrees of freedom, thereby fixing the acrylic glass manned cabin 1.

[0070] The pressure-resistant shell of the acrylic manned cabin 1 is mainly composed of acrylic glass, and its shape can be cylindrical, spherical, etc. In this embodiment, the acrylic manned cabin 1 is only spherical, and includes a manned cabin end connecting lug 101, a metal sealing structure 102, and an acrylic spherical shell 103. The installation position of the metal sealing structure 102 can be adjusted according to the submersible layout. The manned cabin end connecting lug 101 and the metal sealing structure 102 can be connected by welding or assembly.

[0071] The carrier frame 2 serves to support and lift, capable of lifting one or more points, and requires a certain strength. In this embodiment, the carrier frame 2 is merely a schematic structure. To facilitate the installation of the plexiglass manned cabin 1, the carrier frame 2 in this embodiment is assembled from a first frame 201 and a second frame 203 via a connecting structure 202. The first frame 201 has frame end connecting lugs 205 welded to it, and the second frame 203 has a base 204 welded to it.

[0072] The shock absorber 3 adopts an oil-filled structure, with a spring 303 installed in the internal space formed by the outer cylinder 301, base 302, and piston body 304. Two guide bands and an axial sealing ring are installed between the outer cylinder 301 and piston body 304 to ensure that the piston rod moves along the axis and achieves good sealing. The outer cylinder 301 is connected to the oil compensator through an oil pipe 309 to maintain internal and external pressure balance. During the submersible's stationary, hoisting, securing, and descent processes, the shock absorber 3 maintains contact with the plexiglass manned cabin 1, providing a certain support reaction force.

[0073] The shock absorber 3 can also adopt a water-permeable structure. When using a water-permeable structure, a stainless steel spring 303 is preferable. In this embodiment, the shock absorber 3 adopts an oil-filled structure. The shock absorber 3 has a spring 303 installed inside and is connected to the oil compensator through an oil pipe 309, thereby maintaining the internal and external pressure balance. During the submersible's stationary, hoisting, securing, and descent processes, the shock absorber 3 remains in contact with the manned cabin and can provide a certain amount of support reaction force.

[0074] Errors can occur during the processing and welding of the carrier frame 2, leading to misalignment and deviations in the assembly of the manned cabin. To address this issue, a method for installing the plexiglass manned cabin is proposed, with the specific steps as follows:

[0075] Before installing the manned cabin, the cabin is assembled first, and the first frame 201 and the second frame 203 are disassembled. Next, several shock absorbers 3 are installed on the carrier frame 2, and the upper flow channel 307 and lower flow channel 308 of the shock absorbers 3 are connected to a manual hydraulic pump. Hydraulic oil is injected into the shock absorbers 3 via the manual hydraulic pump to adjust their height. Then, the manned cabin is placed on the shock absorbers 3. The relative positions of the manned cabin end connecting lug 101 and the frame end connecting lug 205 are observed, and the height of the corresponding shock absorbers 3 is adjusted until the manned cabin end connecting lug 101 and the frame end connecting lug 205 are aligned, and the connecting pin is inserted. Finally, the manual hydraulic pump is removed, and the flow channels of the shock absorbers 3 are connected to the oil compensator.

[0076] The specific functions of this invention are as follows:

[0077] The basic function of this invention is to effectively fix the plexiglass manned cabin 1. The shock absorber 3 and the carrier frame 2 form an integral structure with elasticity at the bottom, which can restrict and constrain the plexiglass manned cabin 1 in six degrees of freedom, thereby fixing the plexiglass manned cabin 1.

[0078] The shock absorber 3 has a shock absorption function. When the spring 303 in the shock absorber 3 is compressed by the plexiglass manned cabin 1, it will provide a certain rebound force, which can absorb the impact energy generated by the plexiglass manned cabin 1 during instantaneous movement and play a shock absorption role.

[0079] The shock absorber 3 has a limiting function. When the displacement of the plexiglass manned cabin 1 reaches the set value, the outer cylinder 301 and the support head 305 come into contact, thereby triggering the limiting function. The force of the plexiglass manned cabin 1 will be directly fed back to the base 204. By limiting the displacement of the plexiglass manned cabin 1, the carrier frame 2 is protected from damage.

[0080] The shock absorber 3 has a height adjustment function. The outer cylinder 301 has an upper flow channel 307 and a lower flow channel 308 designed on its side wall. By injecting hydraulic oil into it, the piston body 304 can be driven to move up and down, thereby realizing the installation height adjustment function of the plexiglass manned cabin 1.

[0081] The above description is an explanation of the present invention and not a limitation thereof. The scope of the present invention is defined by the claims. Within the scope of protection of the present invention, any form of modification may be made.

Claims

1. A fixing structure for an acrylic glass manned cabin, characterized in that: The system includes an acrylic manned cabin (1), a carrier frame (2), and shock absorbers (3). The acrylic manned cabin (1) is hinged to the frame end connecting ear plate (205) on the carrier frame (2) via a manned cabin end connecting ear plate (101). Several shock absorbers (3) are installed on the carrier frame (2). The bottom of the acrylic manned cabin (1) is in contact with several shock absorbers (3) at the same time. Each shock absorber (3) is installed at an angle, and an angle is formed between two adjacent shock absorbers (3). The shock absorbers (3) and the carrier frame (2) form an integral structure with elasticity at the bottom, which together restricts and constrains the acrylic manned cabin (1) in six degrees of freedom, thereby fixing the acrylic manned cabin (1). The carrier frame (2) is divided into a first frame (201) and a second frame (203). The bottom of the second frame (203) is provided with a number of bases (204) for installing shock absorbers (3). The bottom of the first frame (201) is welded with a frame end connecting ear plate (205). The first frame (201) is connected to the second frame (203) through a connecting structure (202). The structure of the shock absorber (3) is as follows: it includes a base (302), which is fixed to the carrier frame (2). An outer cylinder (301) is fixedly installed on the base (302). An inner cylinder is provided inside the outer cylinder (301). The bottom of the inner cylinder is fixed to the base (302) by fasteners. A spring (303) is sleeved on the outside of the inner cylinder. A piston body (304) is installed on the top surface of the inner cylinder by fasteners. The piston body (304) extends out of the outer cylinder (301) and is connected to a support head ( 305), the top surface of the support head (305) is semi-enclosed with a protective sleeve (306), which is in direct contact with the organic glass manned cabin (1); two guide belts and axial sealing rings are installed between the outer cylinder (301) and the piston body (304); the side wall of the outer cylinder (301) forms an upper flow channel (307) and a lower flow channel (308), a plug (310) is installed at the upper flow channel (307), and the lower flow channel (308) is connected to the oil compensator through an oil pipe (309) to maintain the internal and external pressure balance.

2. The fixing structure of the plexiglass manned cabin as described in claim 1, characterized in that: The pressure-resistant shell of the plexiglass manned cabin (1) is made of plexiglass, and the shape of the plexiglass manned cabin (1) is cylindrical or spherical.

3. The fixing structure of the plexiglass manned cabin as described in claim 1, characterized in that: The structure of the organic glass manned cabin (1) is as follows: it includes a manned cabin end connecting ear plate (101), a metal sealing structure (102) and an organic glass spherical shell (103). The installation position of the metal sealing structure (102) is adjusted according to the arrangement of the submersible. The manned cabin end connecting ear plate (101) and the metal sealing structure (102) are connected by welding or assembly.

4. The fixing structure of the plexiglass manned cabin as described in claim 1, characterized in that: Both the No. 1 frame (201) and the No. 2 frame (203) are made of welded pipe fittings.

5. The fixing structure of the plexiglass manned cabin as described in claim 1, characterized in that: The shock absorber (3) adopts an oil-filled structure or a water-permeable structure.

6. The fixing structure of the plexiglass manned cabin as described in claim 1, characterized in that: The outer cylinder (301) has a frustum-shaped structure.

7. The fixing structure of the plexiglass manned cabin as described in claim 1, characterized in that: The inner cylinder is divided into an upper inner cylinder (311) and a lower inner cylinder (312).

8. A method for installing the fixing structure of the plexiglass manned cabin as described in claim 1, characterized in that: The following steps are included: First, preparations: Beforehand, the No. 1 frame (201) and the No. 2 frame (203) are separated, and various connectors and fasteners are prepared; the manned cabin end connecting ear plate (101), metal sealing structure (102), and plexiglass spherical shell (103) are assembled into plexiglass manned cabin (1) and pass the pressure test, and are ready for installation; Secondly, install shock absorbers (3): Install the shock absorber (3) on the base (204) of the second frame (203), and connect the upper flow channel (307) and lower flow channel (308) of the shock absorber (3) to the manual hydraulic pump; Then, install the plexiglass manned cabin (1): Lift the plexiglass manned cabin (1) and place it on the shock absorber (3). Then assemble the first frame (201) and the second frame (203) into a carrier frame (2). Observe the relative position of the manned cabin end connecting ear plate (101) and the frame end connecting ear plate (205). Use a manual hydraulic pump to inject hydraulic oil into the lower flow channel (308) or upper flow channel (307) to correct the height and level of the plexiglass manned cabin (1) until the manned cabin end connecting ear plate (101) and the frame end connecting ear plate (205) are aligned and then insert the connecting pin. Finally, oil filling compensation: Remove the hydraulic pump of the lower flow channel (308) or the upper flow channel (307), drain the hydraulic oil in the upper flow channel (307) and seal it with a plug (310). The lower flow channel (308) is connected to the oil compensator through the oil pipe (309). During the maintenance of the submersible, the oil level in the oil compensator is checked regularly and oil is replenished.

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