A sealed hoisting device and method for underwater testing of acoustic devices

Abstract

The present invention belongs to the technical field of test equipment manufacturing, and specifically relates to a sealed lifting device and method for underwater testing of acoustic devices. The present invention includes a shell, a flange, a bracket, a sleeve, a cable and a cover plate; the cover plate is detachably sealed and connected to the shell; one end of the bracket is connected to the shell, and the other end of the bracket is detachably connected to the flange; the cable is sealed and connected to the cover plate through the sleeve. The present invention realizes product testing in four different directions by setting four convex structures for lifting on the shell, and the sealing performance is very good, meeting the requirements of product testing.

Description

Technical Field

[0001] The invention belongs to the technical field of experimental test equipment manufacturing, and in particular relates to a sealing hoisting device and method for underwater testing of an acoustic device. Background Art

[0002] Underwater testing is an important part of the production process of acoustic devices, and it is also the final link to test whether the performance parameters of acoustic devices are qualified. Underwater test tooling plays an important role in pool testing and trials. The quality of tooling design, manufacturing and installation directly affect the effect of the entire test and trial. The design principle of underwater test tooling is to minimize the relative weight of the tooling, maximize the rigidity, and ensure reliable sealing performance. No water leakage occurs during the test and trial, and the product installation direction and angle are accurate. During the test and trial, if the sealing performance of the tooling is unreliable, the product may be damaged by water ingress. If the product hoisting direction and angle of the tooling design deviate, the product test parameters may be untrue, and it cannot truthfully reflect whether the final performance parameters of the product are qualified, resulting in misjudgment of the product. Therefore, the sealing performance of the tooling and the hoisting direction and angle are very important in the tooling design. Summary of the invention

[0003] The invention provides a sealing hoisting device and method for underwater testing of an acoustic device, aiming to provide a tooling that can meet the sealing, hoisting direction and angle requirements of underwater testing of an acoustic device.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is:

[0005] A sealed lifting device for underwater testing of an acoustic device comprises a shell, a flange, a bracket, a sleeve, a cable and a cover plate; the cover plate is detachably sealed and connected to the shell; one end of the bracket is connected to the shell, and the other end of the bracket is detachably connected to the flange; the cable is sealed and connected to the cover plate through the sleeve.

[0006] A compression nut is arranged between the sleeve and the cover plate; two sleeves and two cables are arranged, and the two cables are symmetrically and sealedly connected to the cover plate through the sleeves.

[0007] The shell is an open circular cup-shaped structure; the open end of the shell is provided with an annular outer eaves plate perpendicular to the side wall, and four convex structures are provided on the outer eaves plate. The four convex structures are arranged on the same semicircle with gaps, and each convex structure is respectively provided with a lifting hole, and the outer eaves plate is provided with a third screw hole along the circumferential direction; a protrusion is provided on the outer side of the bottom of the shell, and a first screw hole is opened on the protrusion; a second screw hole is provided on the inner bottom of the shell.

[0008] The flange is a circular plate-like structure, with a rectangular protrusion at the center of the flange, two eighth screw holes symmetrically opened on the rectangular protrusion, and multiple seventh screw holes are arranged along the outer edge of the circular plate, and the multiple seventh screw holes are arranged in a circular matrix.

[0009] The bracket is an integrated structure consisting of three sections of a first connecting rod, a second connecting rod and a third connecting rod of different lengths; the first connecting rod is perpendicular to the second connecting rod, the second connecting rod is perpendicular to the third connecting rod and the first connecting rod is parallel to the third connecting rod; two ninth screw holes are opened on the first connecting rod; the lower end of the third connecting rod is provided with an arc-shaped connecting plate, the length of the arc-shaped connecting plate is greater than the width of the third connecting rod, and three tenth screw holes are evenly opened on the surface of the arc-shaped connecting plate.

[0010] It also includes a handle; at least two of the handles are arranged and evenly connected to the cover plate; the handle is composed of two cylinders with different outer diameters, and anti-slip patterns are arranged on the outer side walls of the cylinders.

[0011] The sleeve is a hollow cylindrical body; an annular outer edge perpendicular to the side wall is arranged at one end of the hollow cylindrical body, a first sealing groove is arranged on the surface of the annular outer edge, and an annular boss is arranged on the side wall of the sleeve inner cavity.

[0012] The clamping nut is a hollow octagonal column; one end of the hollow octagonal column is provided with a polygonal annular outer edge perpendicular to the side wall, and a second sealing groove is provided on the surface of the polygonal annular outer edge; the inner cavity side wall of the clamping nut has the same structure as the outer wall, and an octagonal annular boss is provided on the inner wall.

[0013] The cover plate is a circular plate, a plurality of fourth screw holes are opened on the upper edge of the circular plate surface, and two fifth screw holes and two sixth screw holes are symmetrically opened in the middle of the circular plate surface.

[0014] A method for using a sealing hoisting device for underwater testing of an acoustic device comprises the following steps:

[0015] Step 1: Seal the product to be tested to the bottom of the housing and connect the product to be tested to the cable;

[0016] Step 2: Connect one end of the bracket to the test rotating device through a flange, and connect the other end of the bracket to one of the four convex structures of the shell;

[0017] Step 3: After completing step 2, conduct water test;

[0018] Step 4: After step 3 is completed, the product to be tested is recovered, the convex structure connected to the other end of the bracket is replaced, and the process returns to step 3; until all four convex structures are connected, the test is completed.

[0019] Beneficial effects:

[0020] (1) The present invention realizes product testing in four different directions by setting four convex structures for lifting on the shell, thereby meeting the requirements of product testing.

[0021] (2) The present invention adopts sealed connections between the shell and the cover plate, the cover plate and the sleeve, and the sleeve and the cable. In particular, the sleeve and the rubber tube are installed by means of a metal gasket-seal ring-metal gasket-seal ring installation method, and then installed in place by tightening with a compression nut. During the test experiment, the tooling and the cable were immersed in water for 72 hours, and water did not enter the interior of the tooling and the cable, indicating that the sealing performance was very good.

[0022] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a schematic diagram of the structure of the present invention;

[0025] Figure 2 It is a structural schematic diagram of the housing of the present invention;

[0026] Figure 3 yes Figure 2 A cross-sectional view of

[0027] Figure 4 It is a structural schematic diagram of the cover plate of the present invention;

[0028] Figure 5 yes Figure 4 A cross-sectional view of

[0029] Figure 6 It is a structural schematic diagram of the flange of the present invention;

[0030] Figure 7 yes Figure 6 A top view of

[0031] Figure 8 yes Figure 6 Side view of

[0032] Fig. 9 It is a schematic diagram of the support structure of the present invention;

[0033] Fig.10 yes Fig. 9 A cross-sectional view of

[0034] Fig.11 It is a schematic diagram of the structure of the handle of the present invention;

[0035] Fig.12 It is a structural schematic diagram of the sleeve of the present invention;

[0036] Fig.13 yes Fig.12 A cross-sectional view of

[0037] Fig.14 It is a schematic diagram of the structure of the compression nut of the present invention;

[0038] Fig.15 yes Fig.14 A cross-sectional view of

[0039] Fig.16 It is a schematic structural diagram of the gasket of the present invention.

[0040] In the figure: 1-housing; 2-first nut; 3-fourth sealing ring; 4-first screw; 5-second nut; 6-second screw; 7-third nut; 8-flange; 9-bracket; 10-third screw; 11-fourth nut; 12-first sealing ring; 13-second sealing ring; 14-fourth screw; 15-washer; 16-third sealing ring; 17-sleeve; 18-pressing nut; 19-cable; 20-fifth screw; 21-handle; 22-cover plate; 23-convex structure; 24-fifth A screw hole; 25-a second screw hole; 26-a third screw hole; 27-a fourth screw hole; 28-a fifth screw hole; 29-a sixth screw hole; 30-a component installation position; 31-a seventh screw hole; 32-a eighth screw hole; 33-a ninth screw hole; 34-a tenth screw hole; 35-a boss; 36-a first connecting rod; 37-a second connecting rod; 38-a third connecting rod; 39-annular outer edge; 40-a first sealing groove; 41-a second sealing groove; 42-an octagonal annular boss; 43-a multi-faceted annular outer edge.

[0041] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention. DETAILED DESCRIPTION

[0042] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] Embodiment 1:

[0044] Reference Figure 1-16 A sealed lifting device for underwater testing of an acoustic device is shown, comprising a shell 1, a flange 8, a bracket 9, a sleeve 17, a cable 19 and a cover 22; the cover 22 is detachably sealed and connected to the shell 1; one end of the bracket 9 is connected to the shell 1, and the other end of the bracket 9 is detachably connected to the flange 8; two handles 21 are provided, and the two handles 21 are symmetrically connected to the cover 22; two sleeves 17 and two cables 19 are each provided, and the two cables 19 are symmetrically and sealedly connected to the cover 22 through the sleeves 17.

[0045] In specific applications, the seal in the present invention is installed by using a sealing ring.

[0046] Before the test, the cover plate 22 is assembled first, that is, the second sealing ring 13 is greased and installed in the sleeve 17, the sleeve 17 is installed on the cover plate 22 with the fourth screw 14, and the cable 19 is installed in the sleeve 17 through the gasket 15 and the third sealing ring 16, and is compressed with the compression nut 18. Then the cable 19 bundle is installed in the rubber tube, and the rubber tube is installed in the sleeve 17 in the cover plate 22. The sleeve 17 and the cover plate 22 are sealed by the sealing ring. The sleeve 17 and the rubber tube are installed in place by the installation method of metal gasket-sealing ring-metal gasket-sealing ring. The cable 19 harness is welded to the corresponding connector according to the wiring requirements. Then, the first sealing ring 12 is greased and installed in the corresponding position of the cover plate 22. Two handles 21 are provided on each cover plate 22 to facilitate the handling operation.

[0047] The bracket 9 is installed to the corresponding position of the housing 1 through the first screw 4 and the second nut 5, and the flange 8 is installed to the corresponding position of the bracket 9 through the second screw 6 and the third nut 7. The flange 8 can be hoisted onto the slewing device to test the product.

[0048] Product installation: First, apply grease to the fourth sealing ring 3 and install it to the corresponding position of the housing 1, and fasten the product to the housing 1 with the first nut 2. Then install the cover plate 22 to the housing 1 with the third screw 10 and the fourth nut 11. By changing the different installation positions of the bracket 9 in the housing 1, the product can be tested in four different directions.

[0049] The present invention adopts sealed connections between the shell and the cover plate, the cover plate and the sleeve, and the sleeve and the cable. In particular, the sleeve and the rubber tube are installed in a metal gasket-seal ring-metal gasket-seal ring installation mode, and then installed in place by tightening the clamping nut 18. During the test experiment, the tooling and the cable were immersed in water for 72 hours, and water did not enter the interior of the tooling and the cable, and the sealing performance was very good.

[0050] Embodiment 2:

[0051] Reference Figure 1 , Fig.12 and Fig.13 The sealing lifting device for underwater testing of an acoustic device shown is based on the first embodiment, in which a compression nut 18 is provided between the sleeve 17 and the cover plate 22 .

[0052] In actual use, a compression nut 18 is provided between the sleeve 17 and the cover plate 22. The cable 19 harness is first installed in the rubber tube, and the rubber tube is installed in the sleeve 17 in the cover plate 22. The sleeve 17 and the cover plate 22 are sealed by the third sealing ring 16. The sleeve 17 and the rubber tube are installed in a metal gasket-sealing ring-metal gasket-sealing ring installation mode, and then tightened with the compression nut 18 to install them in place, so that the sealing effect is better.

[0053] Embodiment three:

[0054] Reference Figure 1-Figure 3 A sealed lifting device for underwater testing of acoustic devices is shown. On the basis of Example 1, the shell 1 is an open circular cup-shaped structure; the open end of the shell 1 is provided with an annular outer eaves plate perpendicular to the side wall, and four convex structures 23 are provided on the outer eaves plate. The four convex structures 23 are arranged on the same semicircle with gaps, and each convex structure 23 is respectively provided with a lifting hole, and the outer eaves plate is circumferentially provided with a third screw hole 26; a protrusion is provided on the outer side of the bottom of the shell 1, and a first screw hole 24 is opened on the protrusion; a second screw hole 25 is provided on the inner bottom of the shell 1.

[0055] In actual use, the four "convex"-shaped structures 23 of the housing 1 are located at different product hoisting directions to achieve parameter testing of the product in four directions, that is, the first screw hole 24 is the installation position of the bracket 9. The second screw hole 25 is the connection position between the product and the housing 1, and the third screw hole 26 is the position where the housing 1 and the cover plate 22 are installed through the third screw 10.

[0056] The adoption of this technical solution realizes the testing requirements for products in different directions.

[0057] Embodiment 4:

[0058] Reference Figure 1 , Figure 6-Figure 8 A sealing lifting device for underwater testing of an acoustic device is shown. Based on the first embodiment, the flange 8 is a circular plate-like structure, a rectangular protrusion is provided at the center of the flange 8, two eighth screw holes 32 are symmetrically opened on the rectangular protrusion, and a plurality of seventh screw holes 31 are provided along the outer edge of the circular plate, and the plurality of seventh screw holes 31 are arranged in a circular matrix.

[0059] In actual use, the seventh screw hole 31 on the flange 8 is the screw connection position between the bracket 9 and the rotating device, and the eighth screw hole 32 is the installation position between the bracket 9 and the flange 8.

[0060] Embodiment five:

[0061] Reference Figure 1 , Fig. 9 and Fig.10 A sealed lifting device for underwater testing of acoustic devices is shown, based on Example 1: the bracket 9 is an integrated structure consisting of three sections of a first connecting rod 36, a second connecting rod 37 and a third connecting rod 38 of different lengths; the first connecting rod 36 is perpendicular to the second connecting rod 37, the second connecting rod 37 is perpendicular to the third connecting rod 38, and the first connecting rod 36 is parallel to the third connecting rod 38; two ninth screw holes 33 are opened on the first connecting rod 36; the lower end of the third connecting rod 38 is provided with an arc-shaped connecting plate, the length of the arc-shaped connecting plate is greater than the width of the third connecting rod 38, and three tenth screw holes 34 are evenly opened on the surface of the arc-shaped connecting plate.

[0062] In actual use, the ninth screw hole 33 is the screw installation position of the bracket 9 and the flange 8 , and the tenth screw hole 34 is the screw installation position of the four “convex”-shaped structures 23 of the housing 1 and the bracket 9 .

[0063] The bracket 9 adopts the technical solution to conveniently connect the housing 1 with the rotary device to meet the test requirements.

[0064] Embodiment six:

[0065] Reference Figure 1 and Fig.11 The sealed lifting device for underwater testing of acoustic devices shown in the figure is based on the first embodiment and also includes a handle 21; at least two handles 21 are arranged and are evenly connected to the cover plate 22; the handle 21 is composed of two cylinders with different outer diameters, and anti-slip grooves are arranged on the outer side walls of the cylinders.

[0066] In actual use, the handle 21 is connected through the screw holes on the cover plate 22. The handle 21 is provided with anti-slip grooves, which effectively prevent the cover plate 22 from slipping when being lifted, causing product damage or personal injury.

[0067] Embodiment seven:

[0068] Reference Figure 1 , Fig.12 and Fig.13A sealing lifting device for underwater testing of acoustic devices is shown, based on Example 1: the sleeve 17 is a hollow cylindrical body; an annular outer edge 39 perpendicular to the side wall is provided at one end of the hollow cylindrical body, a first sealing groove 40 is provided on the surface of the annular outer edge 39, and an annular boss 35 is provided on the side wall of the inner cavity of the sleeve 17.

[0069] In actual use, a sealing ring is arranged in the first sealing groove 40 arranged on the sleeve 17 to seal the cover plate 22 and the sleeve 17. At the same time, there is a boss 35 in the inner cavity of the sleeve 17 for installing a gasket and a sealing ring between the cable 19 and the sleeve 17 to achieve a sealing effect.

[0070] Embodiment eight:

[0071] Reference Figure 1 , Fig.14 , Fig.15 and Fig.16 A sealing lifting device for underwater testing of acoustic devices is shown, based on Example 1: the clamping nut 18 is a hollow octagonal column; a polygonal annular outer edge 43 perpendicular to the side wall is provided at one end of the hollow octagonal column, and a second sealing groove 41 is provided on the surface of the polygonal annular outer edge 43; the inner cavity side wall of the clamping nut 18 has the same structure as the outer wall, and an octagonal annular boss 42 is provided on the inner wall.

[0072] The compression nut 18 is used to compress the gasket and the sealing ring between the cable 19 and the sleeve 17 to achieve a sealing effect. The sealing ring is arranged in the second sealing groove 41 to achieve a better sealing effect.

[0073] In actual use, a gasket and a sealing ring are installed between the cable 19 and the sleeve 17. The installation method adopted is: gasket 15 - third sealing ring 16 - gasket 15 - third sealing ring 16, and then installed in place by tightening the clamping nut 18. This installation method can ensure that the sealing ring is installed in place and has a good sealing effect.

[0074] Embodiment nine:

[0075] Reference Figure 1 , Figure 4 and Figure 5 A sealing lifting device for underwater testing of acoustic devices is shown, based on Example 1: the cover plate 22 is a circular plate, a plurality of fourth screw holes 27 are opened on the edge of the circular plate surface, and two fifth screw holes 28 and two sixth screw holes 29 are symmetrically opened in the middle of the circular plate surface.

[0076] In actual use, the two handles 21 are connected to the sixth screw hole 29 through the fifth screw 20 respectively; the two sleeves 17 are sealed and connected to the two fifth screw holes 28 respectively; the fourth screw hole 27 is the installation position of the cover plate 22 and the housing 1. The component installation position 30 is the installation position of the gasket 15, the third sealing ring 16, the sleeve 17, and the compression nut 18. The sixth screw hole 29 is the installation position of the handle 21.

[0077] Embodiment ten:

[0078] A method for using a sealing hoisting device for underwater testing of an acoustic device comprises the following steps:

[0079] Step 1: seal the product to be tested to the bottom surface of the housing 1, and connect the product to be tested to the cable 19;

[0080] Step 2: Connect one end of the bracket 9 to the test rotary device through the flange 8, and connect the other end of the bracket 9 to one of the four convex structures 23 of the housing 1;

[0081] Step 3: After completing step 2, conduct water test;

[0082] Step 4: After step 3 is completed, the product to be tested is recovered, the convex structure 23 connected to the other end of the bracket 9 is replaced, and the process returns to step 3; until all four convex structures 23 are connected once, the test is completed.

[0083] The present invention has been tested for sealing performance. It was immersed in water for 72 hours. During this period, the test was carried out continuously without water ingress. After the test was completed, no water ingress was found in the tooling and the cable. The sealing performance is very good. The present invention can realize product testing in 4 different directions, meeting the requirements of product testing.

[0084] The rotating device in this embodiment is prior art.

[0085] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

[0086] In the absence of conflicts, technicians in this field can combine the relevant technical features in the above examples according to actual conditions to achieve corresponding technical effects. The specific combinations are not described here one by one.

[0087] It should be noted that all directional indications in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between various components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0088] The above are only preferred embodiments of the present invention. The present invention will not be limited to the embodiments shown herein, but should conform to the widest scope consistent with the principles and novel features disclosed herein. Any simple modification, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A sealed lifting device for underwater testing of acoustic devices, characterized in that: The invention comprises a housing (1), a flange (8), a bracket (9), a sleeve (17), a cable (19), a handle (21) and a cover plate (22); the cover plate (22) is detachably sealed and connected to the housing (1); one end of the bracket (9) is connected to the housing (1), and the other end of the bracket (9) is detachably connected to the flange (8); the cable (19) is sealed and connected to the cover plate (22) via the sleeve (17); The cable (19) bundle is installed in the rubber tube, the rubber tube is installed in the sleeve (17) in the cover plate (22), the sleeve (17) and the cover plate (22) are sealed by a sealing ring, and the sleeve (17) and the rubber tube are installed by a metal gasket-sealing ring-metal gasket-sealing ring installation method; The shell (1) is a circular cup-shaped structure with an open mouth; the open end of the shell (1) is provided with an annular outer eaves plate perpendicular to the side wall, and the outer eaves plate is provided with four convex structures (23); the four convex structures (23) are arranged on the same semicircle with a gap, and each convex structure (23) is provided with a hoisting hole; The bracket (9) is an integrated structure consisting of a first connecting rod (36), a second connecting rod (37) and a third connecting rod (38) of three different lengths; the first connecting rod (36) is perpendicular to the second connecting rod (37), the second connecting rod (37) is perpendicular to the third connecting rod (38), and the first connecting rod (36) is parallel to the third connecting rod (38); the first connecting rod (36) is provided with two ninth screw holes (33); the lower end of the third connecting rod (38) is provided with an arc-shaped connecting plate; and three tenth screw holes (34) are evenly provided on the surface of the arc-shaped connecting plate.

2. A sealing hoisting device for underwater testing of an acoustic device as claimed in claim 1, characterized in that: A compression nut (18) is provided between the sleeve (17) and the cover plate (22); two sleeves (17) and two cables (19) are provided, and the two cables (19) are symmetrically and sealedly connected to the cover plate (22) through the sleeve (17).

3. A sealing hoisting device for underwater testing of an acoustic device as claimed in claim 1, characterized in that: The outer eaves plate is provided with a third screw hole (26) along the circumferential direction; a protrusion is provided on the outer side of the bottom of the shell (1), and a first screw hole (24) is opened on the protrusion; and a second screw hole (25) is provided on the inner bottom of the shell (1).

4. A sealing hoisting device for underwater testing of acoustic devices as claimed in claim 1, characterized in that: The flange (8) is a circular plate-shaped structure, a rectangular protrusion is provided at the center of the flange (8), two eighth screw holes (32) are symmetrically opened on the rectangular protrusion, and a plurality of seventh screw holes (31) are provided along the outer edge of the circular plate, and the plurality of seventh screw holes (31) are arranged in a circular matrix.

5. A sealing hoisting device for underwater testing of acoustic devices as claimed in claim 1, characterized in that: The length of the arc-shaped connecting plate is greater than the width of the third connecting rod (38).

6. A sealing hoisting device for underwater testing of acoustic devices as claimed in claim 1, characterized in that: It also includes a handle (21); at least two of the handles (21) are provided and are evenly connected to the cover plate (22); the handle (21) is composed of two cylinders with different outer diameters, and anti-slip grooves are provided on the outer side walls of the cylinders.

7. A sealing hoisting device for underwater testing of acoustic devices as claimed in claim 1, characterized in that: The sleeve (17) is a hollow cylindrical body; an annular outer edge perpendicular to the side wall is provided at one end of the hollow cylindrical body, a first sealing groove (40) is provided on the surface of the annular outer edge, and an annular boss (35) is provided on the inner cavity side wall of the sleeve (17).

8. A sealing hoisting device for underwater testing of an acoustic device as claimed in claim 2, characterized in that: The clamping nut (18) is a hollow octagonal column; one end of the hollow octagonal column is provided with a multi-sided annular outer edge (43) perpendicular to the side wall, and a second sealing groove (41) is provided on the surface of the multi-sided annular outer edge (43); the inner cavity side wall of the clamping nut (18) has the same structure as the outer wall, and an octagonal annular boss (42) is provided on the inner wall.

9. A sealing hoisting device for underwater testing of acoustic devices as claimed in claim 1, characterized in that: The cover plate (22) is a circular plate, with a plurality of fourth screw holes (27) opened on the upper edge of the circular plate surface, and two fifth screw holes (28) and two sixth screw holes (29) symmetrically opened in the middle of the circular plate surface.

10. A method for using a sealing hoisting device for underwater testing of an acoustic device according to any one of claims 1 to 9, characterized in that: The following steps are included: Step 1: sealingly connecting the product to be tested to the bottom surface of the housing (1), and connecting the product to be tested to the cable (19); Step 2: Connect one end of the bracket (9) to the test swivel device through the flange (8), and connect the other end of the bracket (9) to one of the four convex structures (23) of the housing (1); install the cable (19) bundle into the rubber tube, install the rubber tube into the sleeve (17) in the cover plate (22), the sleeve (17) and the cover plate (22) are sealed by a sealing ring, and the sleeve (17) and the rubber tube are installed in place by the installation method of metal gasket-sealing ring-metal gasket-sealing ring, and the cable (19) harness is welded to the corresponding connector according to the wiring requirements, and then the first sealing ring (12) is greased and installed to the corresponding position of the cover plate (22); Step 3: After completing step 2, conduct water test; Step 4: After step 3 is completed, the product to be tested is recovered, the convex structure (23) connected to the other end of the bracket (9) is replaced, and the process returns to step 3; until all four convex structures (23) are connected, the test is completed.

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