Underwater sample recovery simulation device and installation method allowing personnel to enter and exit

Abstract

The present invention relates to an underwater sample recovery simulation device and installation method that allow personnel to enter and exit, including a pressure cylinder, an underwater sample recovery simulation device built into the pressure cylinder, the underwater sample recovery simulation device including a personnel entry and exit cabin, a sampling cabin and a pressure balance cabin, an entry and exit cabin flange is provided on the top of the personnel entry and exit cabin, a channel flange is provided on the pressure cylinder, the entry and exit cabin flange and the channel flange are sealed and fastened butt joint; an auxiliary tooling for easy assembly is provided between the entry and exit cabin flange and the channel flange. The present invention has a compact and reasonable structure and is easy to operate. Through the auxiliary tooling, the personnel entry and exit cabin flange can be butted with the personnel entry and exit channel flange, and the holes of the two flanges can be aligned. The installation efficiency is high, and the difficulty of installation operation is greatly reduced, which lays an experimental foundation for realizing personnel entry and exit in the pressure cylinder to participate in underwater sample recovery demonstration tests.

Description

Technical Field

[0001] The invention relates to the technical field of underwater sampling equipment, in particular to an underwater sample recovery simulation device and an installation method allowing personnel to enter and exit. Background Art

[0002] At present, all kinds of underwater samples obtained by manned submersibles need to be surfaced by the manned submersibles and transferred to surface ships before they can be analyzed and tested.

[0003] The process from underwater sampling to floating to the surface for analysis and testing takes a long time. At the same time, as the water depth changes during the floating process, the sample properties may change, the authenticity of the sample analysis results may be greatly reduced, lack of real-time performance, and low efficiency. Summary of the invention

[0004] In response to the shortcomings in the above-mentioned existing production technology, the applicant provides an underwater sample recovery simulation device and installation method with a reasonable structure that allows personnel to enter and exit, and uses auxiliary structures to achieve precise docking between channel flanges, so that samples can be recovered in situ into the underwater sample recovery device in the manned submersible cabin.

[0005] The technical solution adopted by the present invention is as follows:

[0006] An underwater sample recovery simulation device that allows people to enter and exit includes a pressure cylinder, an underwater sample recovery simulation device built into the pressure cylinder,

[0007] The underwater sample recovery simulation device includes a personnel entry and exit cabin, a sampling cabin and a pressure balance cabin.

[0008] The top of the personnel entry and exit cabin is provided with an entry and exit flange, and the pressure cylinder is provided with a channel flange, and the entry and exit flange and the channel flange are sealed and fastened to each other;

[0009] Auxiliary tooling is provided between the cabin entry and exit flanges and the channel flanges to facilitate assembly.

[0010] As a further improvement of the above technical solution:

[0011] The auxiliary tooling includes:

[0012] The top screw is connected to the channel flange and is used to connect the auxiliary tooling as a whole to the channel flange.

[0013] A gap is reserved between the top screw plane and the top tightening surface of the personnel entrance and exit passage.

[0014] The connecting shaft is connected with a guide positioning block, and the connecting shaft and the guide positioning block are fixedly connected with the top screw plane.

[0015] The spring fixing seat is fixedly connected to the guide shaft and is equipped with a spring.

[0016] The positioning shaft is connected to the spring fixing seat through a spring.

[0017] The auxiliary tooling is initially positioned via the positioning step and the channel flange.

[0018] The bottom of the guide shaft is provided with a hexagonal hole, and the guide positioning block is provided with a threaded hole; the spring fixing seat and the guide positioning block are threadedly connected.

[0019] A through hole is arranged in the positioning shaft, and the positioning shaft sleeve is arranged on the guide shaft to slide relatively.

[0020] During the installation process, three sets of auxiliary tooling in a circular array are set on the channel flange at the same time.

[0021] The auxiliary tooling is also adapted to be equipped with a supporting stand and a lifting device.

[0022] A test method using an underwater sample recovery simulation device that allows personnel to enter and exit, comprising the following steps:

[0023] After the pressure inside the pressure cylinder is increased to the expected pressure, the corresponding balancing valve group is opened to balance the pressure in the pressure cylinder with the pressure in the pressure balancing cabin;

[0024] Open the external hatch cover, place the sample into the pressure balance chamber, and close the external hatch cover and the aforementioned balance valve group;

[0025] Open the normal pressure balancing valve group, release the high pressure in the pressure balancing cabin to normal pressure, open the internal hatch cover, and personnel enter the sampling cabin through the personnel access channel and the personnel access cabin. After sampling, close the internal hatch cover and the normal pressure balancing valve group to complete the sampling process.

[0026] A method for installing an underwater sample recovery simulation device that allows personnel to enter and exit comprises the following steps:

[0027] Lift the pressure cylinder cover and perform rough positioning through the steps on the support stand so that the inlet and outlet flange enters the guide range of the guide positioning block;

[0028] Under the action of gravity, the positioning shaft slides along the guide shaft to the maximum straight state;

[0029] Lift the pressure cylinder cover, and under the positioning of the guide positioning block, lower the pressure cylinder cover and make a fine adjustment until the cabin access flange enters the positioning range of the guide positioning block; at this time, there is a certain gap between the channel flange and the cabin access flange, the bolt through holes on the cabin access flange are not aligned with the through holes on the channel flange, and the positioning shaft contacts the cabin access flange plane;

[0030] In the positioning range of the guide positioning block, lift and rotate the pressure cylinder cover until the bolt holes on the inlet and outlet cabin flange are aligned with the bolt holes on the channel flange; during the fine-tuning of the position of the pressure cylinder cover, the positioning shaft is always in a compressed state until the positioning shaft enters the bolt holes on the inlet and outlet cabin flange; at this time, the positioning shaft is again in a straightened state in the bolt holes; in this state, the position of the pressure cylinder cover is fixed, the holes of the inlet and outlet cabin flange and the channel flange are aligned, and the pressure cylinder cover is supported by the stand;

[0031] After the hole position is aligned, there is still a certain gap between the channel flange and the inlet and outlet cabin flange. The jacking device is controlled to lift the underwater sample recovery simulation device to eliminate this gap and tighten the connection;

[0032] After the first tightening connection is completed, remove the spring fixing seat, positioning shaft, spring, and top screw, and tighten the remaining bolts;

[0033] Finally, the pressure cylinder cover and the underwater sample recovery simulation device are hoisted as a whole and installed into the pressure cylinder as a whole to obtain the assembled product.

[0034] As a further improvement of the above technical solution:

[0035] During the dismantling process, the spring fixing seat, locating shaft, spring and guide shaft are rotated and removed together through the hexagonal hole at the bottom of the guide shaft, and then all the auxiliary tooling is removed by removing the top screw.

[0036] The beneficial effects of the present invention are as follows:

[0037] The present invention has a compact and reasonable structure and is easy to operate. Through auxiliary tooling, the personnel entry and exit cabin flange can be connected with the personnel entry and exit channel flange, and the holes of the two flanges can be aligned. The installation efficiency is high and the difficulty of installation operation is greatly reduced, laying an experimental foundation for realizing the entry and exit of personnel in the pressure cylinder to participate in the underwater recovery sample demonstration test. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic diagram of the structure of the pressure cylinder test component of the overall device of the present invention.

[0039] Figure 2 The figure is a schematic diagram of an installation state of the present invention.

[0040] Figure 3 for Figure 2 Enlarged view of part A.

[0041] Figure 4 for Figure 3 A cross-sectional view along the axial direction of the spring.

[0042] Figure 5 This is another schematic diagram of the installation state of the present invention.

[0043] Figure 6 for Figure 5 Schematic diagram of the positioning axis position structure in.

[0044] Figure 7 This is a schematic diagram of the positioning shaft of the present invention after installation is completed.

[0045] Figure 8 The schematic diagram of the complete structure assembly of the present invention is shown in FIG.

[0046] Among them: 1. Pressure cylinder; 2. Underwater sample recovery simulation device; 3. Auxiliary tooling; 4. Support stand; 5. Lifting device;

[0047] 101. Pressure cylinder cover; 102. Personnel access passage; 103. Passage flange; 104. Tightening surface; 105. Through hole;

[0048] 201, personnel entry and exit; 202, sampling cabin; 203, pressure balance cabin; 204, entry and exit flange; 205, bolt through hole; 206, internal hatch cover; 207, external hatch cover;

[0049] 301, top screw plane; 302, guide positioning block; 304, positioning step; 305, spring fixing seat; 306, spring; 307, guide shaft; 308, positioning shaft; 309, hexagon socket hole; 311, top screw; 312, connecting shaft. DETAILED DESCRIPTION

[0050] The specific implementation of the present invention will be described below in conjunction with the accompanying drawings.

[0051] like Figure 1 As shown, the underwater sample recovery simulation device that allows people to enter and exit in this embodiment includes a pressure cylinder 1, an underwater sample recovery simulation device 2 built into the pressure cylinder 1,

[0052] The underwater sample recovery simulation device 2 includes a personnel entry and exit cabin 201, a sampling cabin 202 and a pressure balance cabin 203.

[0053] The top of the personnel entry and exit cabin 201 is provided with an entry and exit cabin flange 204, and the pressure cylinder 1 is provided with a channel flange 103, and the entry and exit cabin flange 204 and the channel flange 103 are sealed and fastened to each other;

[0054] An auxiliary tool 3 is provided between the cabin entry and exit flange 204 and the channel flange 103 to facilitate assembly.

[0055] Auxiliary tooling 3 includes:

[0056] The top screw 311 is connected to the channel flange 103 and is used to connect the auxiliary tooling 3 as a whole to the channel flange 103.

[0057] A gap is reserved between the top screw plane 301 and the top tightening surface 104 of the personnel entrance and exit passage.

[0058] The connecting shaft 312 is connected with the guide positioning block 302. The connecting shaft 312 and the guide positioning block 302 are fixedly connected with the top screw plane 301.

[0059] The spring fixing seat 305 is fixedly connected to the guide shaft 307 and is equipped with a spring 306.

[0060] The positioning shaft 308 is connected to the spring fixing seat 305 through the spring 306 .

[0061] The auxiliary tooling 3 is preliminarily positioned with the channel flange 103 via the positioning step 304 .

[0062] A hexagonal hole 309 is provided at the bottom of the guide shaft 307 , and a threaded hole is provided on the guide positioning block 302 ; the spring fixing seat 305 and the guide positioning block 302 are threadedly connected.

[0063] The positioning shaft 308 is provided with a through hole 105 , and the positioning shaft 308 is sleeved on the guide shaft 307 to slide relatively.

[0064] During the installation process, three sets of auxiliary tooling 3 in a circumferential array are set on the channel flange 103 at the same time.

[0065] The auxiliary tooling 3 is also equipped with a supporting stand 4 and a lifting device 5 .

[0066] The test method of the present embodiment using an underwater sample recovery simulation device that allows people to enter and exit includes the following steps:

[0067] After the pressure inside the pressure cylinder 1 is increased to the expected pressure, the corresponding balance valve group is opened to balance the pressure in the pressure cylinder 1 with the pressure in the pressure balance chamber 203;

[0068] Open the external hatch cover 207, place the sample into the pressure balance chamber 203, and close the external hatch cover 207 and the aforementioned balance valve group;

[0069] Open the normal pressure balancing valve group, release the high pressure in the pressure balancing cabin 203 to normal pressure, open the internal hatch cover 206, and personnel enter the sampling cabin 202 through the personnel access channel and the personnel access cabin 201. After sampling, close the internal hatch cover 206 and the normal pressure balancing valve group to complete the sampling process.

[0070] The installation method of the underwater sample recovery simulation device 2 that allows people to enter and exit in this embodiment includes the following steps:

[0071] Lift the pressure cylinder cover 101 and perform rough positioning through the steps on the support stand 4, so that the cabin entry and exit flange 204 enters the guide range of the guide positioning block 302;

[0072] Under the action of gravity, the positioning shaft 308 slides along the guide shaft 307 to a maximum straight state;

[0073] The pressure cylinder cover 101 is lifted, and under the positioning of the guide positioning block 302, the pressure cylinder cover 101 is lowered and fine-tuned until the cabin access flange 204 enters the positioning range of the guide positioning block 302; at this time, there is a certain gap between the channel flange 103 and the cabin access flange 204, the bolt through hole 205 on the cabin access flange 204 is not aligned with the through hole 105 on the channel flange 103, and the positioning shaft 308 is in contact with the plane of the cabin access flange 204;

[0074] In the positioning range of the guide positioning block 302, the pressure cylinder cover 101 is lifted and rotated until the bolt through holes 205 on the cabin access flange 204 are aligned with the bolt through holes 205 on the channel flange 103; during the process of fine-tuning the position of the pressure cylinder cover 101, the positioning shaft 308 is always in a compressed state until the positioning shaft 308 enters the bolt through holes 205 on the cabin access flange 204; at this time, the positioning shaft 308 is again in a straightened state in the bolt through holes 205; in this state, the position of the pressure cylinder cover 101 is fixed, the cabin access flange 204 and the channel flange 103 are aligned, and the pressure cylinder cover 101 is supported by the stand 4;

[0075] After the hole position is aligned, there is still a certain gap between the channel flange 103 and the inlet and outlet flange 204. The jacking device 5 is controlled to lift the underwater sample recovery simulation device 2 to eliminate the gap and tighten the connection;

[0076] After the first tightening connection is completed, remove the spring fixing seat 305, the positioning shaft 308, the spring 306, and the top screw 311, and tighten the remaining bolts;

[0077] Finally, the pressure cylinder cover 101 and the underwater sample recovery simulation device 2 are hoisted as a whole and installed in the pressure cylinder 1 as a whole to obtain an assembled product.

[0078] During the removal process, the spring fixing seat 305, the positioning shaft 308, the spring 306 and the guide shaft 307 are rotated and removed together through the hexagonal hole 309 at the bottom of the guide shaft 307, and then the auxiliary tooling 3 is completely removed by removing the top screw 311.

[0079] The specific structure and working principle of the present invention are as follows:

[0080] like Figure 1-Figure 8 As shown, the device used for the pressure cylinder test is mainly composed of a pressure cylinder 1 and an underwater sample recovery simulation device 2.

[0081] like Figure 1As shown, a personnel access passage 102 is provided on the top of the pressure cylinder cover 101. The underwater sample recovery simulation device 2 is composed of a personnel access cabin 201, a sampling cabin 202 and a pressure balance cabin 203 on the top.

[0082] The cabin entry and exit flange 204 on the top of the personnel entry and exit cabin 201 and the channel flange 103 at the bottom of the personnel entry and exit channel need to be docked and fastened with bolts. A seal is provided between the two flanges to ensure the sealing during the test and prevent water in the pressure cylinder from entering the personnel entry and exit cabin 201 and the personnel entry and exit channel 102.

[0083] During the test, the pressure in the pressure cylinder 1 is increased to the set pressure, and the high-pressure balancing valve group is controlled to open. After the pressure in the pressure cylinder 1 and the pressure in the pressure balancing chamber 203 are balanced, the external hatch cover 207 is opened, and the sample is placed in the pressure balancing chamber 203, and the external hatch cover 207 and the high-pressure balancing valve group are closed;

[0084] Then, the normal pressure balancing valve group is controlled to open, the high pressure in the pressure balancing chamber 203 is relieved to normal pressure, the internal hatch cover 206 is opened, and personnel enter the sampling chamber 202 through the personnel access channel 102 and the personnel access chamber 201. After manual sampling, the internal hatch cover 206 and the normal pressure balancing valve group are closed to complete the full process test demonstration of underwater sample recovery.

[0085] like Figure 2 , Figure 5 , Figure 7 and Figure 8 As shown, the installation tooling of the cabin entry and exit flange 204 and the channel flange 103 at the bottom of the personnel entry and exit channel mainly includes auxiliary tooling 3, a supporting stand 4 and a jacking device 5.

[0086] The auxiliary tooling 3 is mainly composed of a top screw plane 301, a connecting shaft 312, a guide positioning block 302, a positioning step 304, a spring fixing seat 305, a spring 306, a guide shaft 307 and a positioning shaft 308.

[0087] The auxiliary tooling 3 is fixed to a certain through hole 105 of the channel flange 103 by means of a top screw 311, and a certain gap is left between the top screw plane 301 of the auxiliary tooling 3 and the top tightening surface 104 of the personnel access channel 102. The top screw plane 301, the connecting shaft 312 and the guide positioning block 302 are fixedly connected.

[0088] The auxiliary tooling 3 is aligned and positioned with the through hole 105 on the channel flange 103 via the positioning step 304 .

[0089] The spring fixing seat 305 is fixedly connected to the guide shaft 307 . A hexagonal hole 309 is provided at the bottom of the guide shaft 307 . A threaded hole 303 is provided on the guide positioning block 302 . The spring fixing seat 305 is connected to the guide positioning block 302 through threads.

[0090] The positioning shaft 308 is connected to the spring fixing seat 305 through the spring 306. A through hole is provided in the positioning shaft 308, which can slide on the guide shaft 307. During installation, three sets of auxiliary tooling 3 are evenly distributed on the channel flange 103 for auxiliary installation.

[0091] The support stand 4 is used to support the pressure cylinder cover 101 , and the step 401 on the support stand 4 is used for rough positioning of the pressure cylinder cover 101 when it is lifted.

[0092] The lifting device 5 is used to lift the underwater sample recovery simulation device so that the cabin access flange 204 contacts the channel flange 103 at the bottom of the personnel access channel. In this embodiment, the lifting device 5 is a scissor lift.

[0093] like Figure 2 As shown, the pressure cylinder cover 101 is hoisted to a certain height, roughly positioned by the step 401 on the support stand 4, and adjusted to a small extent to lower, so that the inlet and outlet flange 204 of the device enters the guide range of the guide positioning block 302. At this time, there is a large distance between the channel flange 103 and the inlet and outlet flange 204, and the positioning shaft 308 slides to the bottom along the guide shaft 307 under the action of gravity, and is in the most straight state.

[0094] like Figure 5 As shown, the pressure cylinder cover 101 is lifted, and under the positioning of the guide positioning block 302, the pressure cylinder cover 101 slowly descends, and the position is fine-tuned during the lifting process until the cabin entry and exit flange 204 enters the positioning range of the guide positioning block 302. At this time, there is a certain gap between the channel flange 103 and the cabin entry and exit flange 204. Since the bolt through holes 205 on the cabin entry and exit flange 204 are not aligned with the bolt through holes 105 on the channel flange 103, the positioning shaft 308 is in contact with the plane of the cabin entry and exit flange 204. Under the action of pressure, the positioning shaft 308 is compressed a certain distance.

[0095] like Figure 7 As shown, in the positioning range of the guide positioning block 302, the pressure cylinder cover 101 is lifted and slowly rotated until the bolt through hole 205 on the access cabin flange 204 is aligned with the bolt through hole 105 on the channel flange 103. During the fine adjustment of the position of the pressure cylinder cover 101, the positioning shaft 308 is always in a compressed state until the positioning shaft 308 enters the bolt through hole 205 on the access cabin flange 204. At this time, the positioning shaft 308 is again in a straightened state in the bolt through hole 205 under the action of gravity. At this time, the position of the pressure cylinder cover 101 is fixed and cannot be adjusted, and the hole positions of the access cabin flange 204 and the channel flange 103 are aligned. Finally, the pressure cylinder cover 101 is placed on the stand 4, and the weight of the pressure cylinder cover 101 is supported by the stand 4.

[0096] like Figure 8As shown, after the hole positions of the cabin access flange 204 and the channel flange 103 are aligned, there is still a certain gap between the channel flange 103 and the cabin access flange 204. The lifting device 5 is controlled to lift the underwater sample recovery simulation device 2 so that the cabin access flange 204 is in full contact with the assembly surface of the channel flange 103. Then the bolt holes where the auxiliary tooling 3 is not installed are fastened by bolts. After the bolts are fastened, the spring fixing seat 305, the positioning shaft 308, the spring 306 and the guide shaft 307 are rotated and removed together through the hexagonal hole 309 at the bottom of the guide shaft 307. After removal, the auxiliary tooling 3 is completely removed by removing the top screw 311, and the remaining bolts are fastened. Finally, the pressure cylinder cover 101 and the underwater sample recovery simulation device 2 are hoisted as a whole and installed in the pressure cylinder as a whole.

[0097] 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. An installation tool for an underwater sample recovery simulation device that allows personnel to enter and exit, characterized in that: It comprises a pressure cylinder (1), an underwater sample recovery simulation device (2) built into the pressure cylinder (1), The underwater sample recovery simulation device (2) comprises a personnel entry and exit cabin (201), a sampling cabin (202) and a pressure balance cabin (203). A cabin entry and exit flange (204) is provided on the top of the personnel entry and exit cabin (201), a channel flange (103) is provided on the pressure cylinder (1), and the cabin entry and exit flange (204) and the channel flange (103) are sealed and fastened to each other; An auxiliary tool (3) is provided between the cabin entry and exit flange (204) and the channel flange (103) to facilitate assembly. The auxiliary tooling (3) is also equipped with a supporting frame (4) and a lifting device (5). The auxiliary tooling (3) comprises a top screw plane (301), a connecting shaft (312), a guide positioning block (302), a positioning step (304), a spring fixing seat (305), a spring (306), a guide shaft (307) and a positioning shaft (308). The auxiliary tooling (3) is fixed to the through hole (105) of the channel flange (103) by means of a top screw (311), and a gap is left between the top screw plane (301) of the auxiliary tooling (3) and the top tightening surface (104) of the personnel access channel (102); the top screw plane (301), the connecting shaft (312) and the guide positioning block (302) are fixedly connected. The auxiliary tooling (3) is aligned and positioned with the through hole (105) on the channel flange (103) through the positioning step (304). The spring fixing seat (305) is fixedly connected to the guide shaft (307), the bottom of the guide shaft (307) is provided with a hexagonal hole (309), the guide positioning block (302) is provided with a threaded hole (303), and the spring fixing seat (305) is connected to the guide positioning block (302) through a thread. The positioning shaft (308) is connected to the spring fixing seat (305) via a spring (306). A through hole is provided in the positioning shaft (308) so that the positioning shaft (308) can slide on the guide shaft (307). The support frame (4) is used to support the pressure cylinder cover, and the step (401) on the support frame (4) is used for rough positioning when the pressure cylinder cover is lifted. The lifting device (5) is used to lift the underwater sample recovery simulation device so that the cabin access flange (204) contacts the channel flange (103) at the bottom of the personnel access channel.

2. The installation tool for the underwater sample recovery simulation device that allows people to enter and exit as claimed in claim 1, characterized in that: During installation, three sets of auxiliary tooling (3) are evenly distributed on the channel flange (103) to assist in installation.

3. The installation tool for the underwater sample recovery simulation device that allows people to enter and exit as claimed in claim 1 is characterized in that: The lifting device (5) adopts a scissor-type lifting platform.

4. A method for installing an underwater sample recovery simulation device that allows personnel to enter and exit, characterized in that: The installation tool for the underwater sample recovery simulation device that allows people to enter and exit as claimed in claim 1 is used, and the installation method includes the following steps: The pressure cylinder cover (101) is lifted and roughly positioned by means of the steps on the support stand (4) so ​​that the cabin entry and exit flange (204) enters the guide range of the guide positioning block (302); Under the action of gravity, the positioning shaft (308) slides along the guide shaft (307) to a maximum straightening state; The pressure cylinder cover (101) is lifted, and under the positioning of the guide positioning block (302), the pressure cylinder cover (101) is lowered and fine-tuned until the cabin access flange (204) enters the positioning range of the guide positioning block (302); at this time, there is a certain gap between the channel flange (103) and the cabin access flange (204), the bolt through hole (205) on the cabin access flange (204) and the through hole (105) on the channel flange (103) are not aligned, and the positioning shaft (308) is in contact with the cabin access flange (204) plane; In the positioning range of the guide positioning block (302), the pressure cylinder cover (101) is lifted and rotated until the bolt through hole (205) on the cabin access flange (204) is aligned with the through hole (105) on the channel flange (103); during the process of fine-tuning the position of the pressure cylinder cover (101), the positioning shaft (308) is always in a compressed state until the positioning shaft (308) enters the bolt through hole (205) on the cabin access flange (204); at this time, the positioning shaft (308) is again in a straightened state in the bolt through hole (205); in this state, the position of the pressure cylinder cover (101) is fixed, the hole positions of the cabin access flange (204) and the channel flange (103) are aligned, and the pressure cylinder cover (101) is supported by the support stand (4); After the hole positions are aligned, there is still a certain gap between the channel flange (103) and the inlet and outlet cabin flange (204), and the jacking device (5) is controlled to lift the underwater sample recovery simulation device (2) to eliminate the gap and tighten the connection; After the first tightening connection is completed, the spring fixing seat (305), the positioning shaft (308), the spring (306), and the top screw (311) are removed, and the remaining bolts are tightened; Finally, the pressure cylinder cover (101) and the underwater sample recovery simulation device (2) are hoisted as a whole and installed as a whole into the pressure cylinder (1) to obtain an assembled finished product.

5. The installation method according to claim 4, characterized in that: During the removal process, the spring fixing seat (305), the positioning shaft (308), the spring (306) and the guide shaft (307) are rotated and removed together through the hexagonal hole (309) at the bottom of the guide shaft (307), and then the auxiliary tooling (3) is completely removed by removing the top screw (311).

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