Underwater sound transmission sealing structure

Abstract

The invention relates to the technical field of underwater sound electronic equipment, and discloses an underwater sound transmission sealing structure which comprises an equipment body, a sound transmission cover is installed on one side of the outer wall of the equipment body, a mounting base is fixedly connected to the outer wall of the equipment body and matched with the sound transmission cover in an inserted mode, and three sealing boxes are evenly and fixedly connected to the top of the mounting base. Auxiliary sealing mechanisms are arranged in the sealing boxes, the bottom of the sound transmission cover is fixedly connected with inserting rods with the same number as the sealing boxes, the inserting rods are matched with the auxiliary sealing mechanisms in an inserted mode, and a positioning pin is further fixedly connected to the position, located on one side of the inserting rods, of the bottom of the sound transmission cover; the top end of the elastic sealing strip expands gradually to fill the whole gap, the gap between the sound transmission cover and the mounting base is blocked, the sealing effect is improved, the situation that oil in the sound transmission cover leaks through the gap due to untight sealing is avoided, and the service life of the sound transmission cover is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of underwater acoustic electronic equipment, and in particular to an underwater sound-permeable sealing structure. Background Art

[0002] The field of underwater acoustic electronic equipment technology mainly involves electronic equipment related technologies that use sound waves to transmit information, detect, and navigate in underwater environments, ranging from basic underwater acoustic transducer technology to complex underwater acoustic communication systems and sonar equipment. The sound-permeable cover uses an oil seal to make the sonar transducer watertight and sound-permeable. At the same time, the sound-permeable cover can also play the role of sealing, sound-permeable, and protecting the sonar electronic system and transducer.

[0003] There are three main ways to install the sound-transmitting enclosure, namely embedded installation, screw-on installation and bonding installation. It is worth noting that the use environment of the sound-transmitting enclosure is usually underwater. In this special environment, good sealing performance is crucial to improving the service life of the sound-transmitting enclosure. Among these three installation methods, although embedded installation has certain convenience, there are some potential problems in actual application. Specifically, when the embedded installation method is adopted, a gap will inevitably appear between the sound-transmitting enclosure and the installation object. In order to solve this problem, a rubber ring is usually used for sealing. However, as the use time of the sound-transmitting enclosure in the underwater environment increases, the rubber ring will gradually age. The aging of the rubber ring will reduce its sealing performance, and there is a certain gap between the rubber ring and the object to be protected. Under the influence of the underwater high-pressure environment, water can easily enter the inside of the sound-transmitting enclosure through these gaps. Once water enters the inside of the equipment, it will damage various precision components inside, and will also cause oil leakage inside the sound-transmitting enclosure, which will seriously affect the normal operation of the equipment and reduce the service life of the sound-transmitting enclosure and the entire equipment. Summary of the invention

[0004] The object of the present invention is to provide an underwater sound-permeable sealing structure to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, an underwater sound-transmitting sealing structure is provided, including an equipment body, a sound-transmitting cover is installed on one side of the outer wall of the equipment body, a mounting seat is fixedly connected to the outer wall of the equipment body, the mounting seat is plug-matched with the sound-transmitting cover, three sealing boxes are evenly fixedly connected to the top of the mounting seat, an auxiliary sealing mechanism is arranged inside the sealing box, the bottom of the sound-transmitting cover is fixedly connected with a plug rod with the same number as the sealing box, the plug rod is plug-matched with the auxiliary sealing mechanism, a positioning pin is also fixedly connected to the bottom of the sound-transmitting cover and located on one side of the plug rod, an auxiliary installation mechanism is also arranged on the top of the sealing box, the positioning pin is plug-matched with the auxiliary installation mechanism, the auxiliary sealing mechanism is used to seal the gap between the sound-transmitting cover and the equipment body after the sound-transmitting cover is combined with the mounting seat, and the auxiliary installation mechanism is used to accurately insert the plug rod into the inside of the sealing box during the period when the sound-transmitting cover is combined with the mounting seat.

[0006] As a further improvement of the present technical solution, the auxiliary sealing mechanism includes an elastic sealing strip fixedly connected to the top of the mounting seat and located between two adjacent sealing boxes, a cavity is opened inside the top end of the elastic sealing strip, a slide is opened inside the bottom end of the elastic sealing strip, an arc rod is slidably connected inside the sealing box, the end of the arc rod away from the sealing box is slidably connected to the inside of the slide, a first slot is opened at one end of the arc rod located inside the sealing box, the plug rod is plugged into the first slot, a first limit block is fixedly connected to the inner wall of the sealing box on the side close to the first slot, a cylindrical airbag is fixedly connected to the outer wall of the first limit block away from the first slot, an air pipe is fixedly connected to the outer wall of one end of the cylindrical airbag away from the first limit block, and one end of the air pipe away from the cylindrical airbag is fixedly connected to the end of the elastic sealing strip, and the air pipe is connected to the elastic sealing strip and the inside of the cylindrical airbag.

[0007] As a further improvement of the present technical solution, the end of the arc rod close to the first slot is made of magnetic material, and the end of the arc rod located inside the slide is made of plastic material. After sliding out of the slide, the plastic end of the arc rod will continue to press on the cylindrical airbag.

[0008] As a further improvement of the present technical solution, the inner wall of the sealing box on the side away from the first limit block is also fixedly connected to a second limit block. The second limit block and the first limit block are both made of metal. One end of the arc rod made of magnetic material will produce a magnetic attraction reaction with the nearby side during the sliding between the second limit block and the first limit block.

[0009] As a further improvement of the technical solution, the bottom end profile of the positioning pin is conical, and the number of the positioning pins and the insertion rods is the same.

[0010] As a further improvement of the technical solution, a rectangular groove is provided on the inner wall at the top of the sealing box, and the auxiliary installation mechanism includes slide rails symmetrically fixedly connected to the top of the sealing box and located on both sides of the rectangular groove, a sealing rubber block is slidably connected between the inner walls of the two slide rails, the sealing rubber block is located directly above the rectangular groove, a second slot is provided on the inner wall at the center of the sealing rubber block, a rectangular rubber block is fixedly connected to the inner wall at the top of the rectangular groove and located directly below the slide rail, a reference cylinder is also fixedly connected to the top of the sealing rubber block, and the positioning pin is plugged into and fits with the reference cylinder.

[0011] As a further improvement of the technical solution, a positioning clip is fixedly connected to the top of the sealing box and located on one side of the reference tube. The inner contour of the top of the positioning clip matches the outer wall contour of the reference tube, and the reference tube is engaged with the positioning clip before the sealing rubber block slides.

[0012] As a further improvement of the technical solution, a fixing groove is provided on the inner wall of the bottom end of the insertion rod, a limiting rod is fixedly connected to the inner wall of the rectangular groove, and the end of the limiting rod is plugged into and matched with the fixing groove.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. By setting up an auxiliary sealing mechanism, one end of the arc rod plastic material is used to slide inside the slide, so that the top part of the elastic sealing strip can quickly contact the bottom of the sound-transmitting cover after the height is raised. At the same time, the one end of the arc rod plastic material will continue to press the cylindrical airbag, so that the gas generated by the cylindrical airbag after being pressed is filled into the cavity opened inside the top of the elastic sealing strip through the air pipe, so that the top part of the elastic sealing strip gradually expands and fills the entire gap, thereby sealing the gap between the sound-transmitting cover and the mounting seat, thereby improving the sealing effect, avoiding the leakage of oil inside the sound-transmitting cover through the gap due to poor sealing, and extending the service life of the sound-transmitting cover.

[0014] 2. By setting up an auxiliary installation mechanism, when the locating pin is inserted into the reference tube, the insertion rod can be accurately inserted into the first slot through the second slot, which plays a role in preliminary positioning. At the same time, the bottom end of the locating pin is conical. When the locating pin is just inserted into the reference tube, the angle gap between the bottom end of the locating pin and the reference tube can be fine-tuned to ensure that the locating pin can be fully inserted therein, so that the sound-permeable cover and the mounting seat can be tightly combined. At the same time, the sealing rubber block is used to slide inside the slide rail to separate the reference tube from the locating clamp. Since the sealing rubber block and the rectangular rubber block are both made of rubber, and the surface area of ​​the sealing rubber block exceeds that of the rectangular rubber block, the surface of the rectangular rubber block is tightly fitted with the surface of the sealing rubber block in the sliding state, and the rectangular rubber block is used to seal the gap between the sealing rubber block and the surface of the sealing box, thereby achieving the purpose of preventing leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure of the relevant parts of the sound-transmitting cover of the present invention; Figure 3 It is a schematic diagram of the three-dimensional structure of the components related to the mounting seat of the present invention; Figure 4 It is a sectional view of the three-dimensional structure of the sealing box of the present invention; Figure 5 It is a sectional view of the three-dimensional structure of the auxiliary sealing mechanism of the present invention; Figure 6 It is a schematic diagram of the three-dimensional structure of the auxiliary installation mechanism of the present invention; Figure 7 It is a sectional view of the three-dimensional structure of the related parts of the limit rod of the present invention; Figure 8 It is a schematic diagram of the three-dimensional structure of the auxiliary sealing mechanism of the present invention; Fig. 9 It is a schematic diagram of the three-dimensional structure of the elastic closing strip of the present invention.

[0016] The meaning of each number in the figure is: Equipment body; 2. Sound-transmitting cover; 21. Insertion rod; 22. Fixing slot; 23. Positioning pin; 3. Mounting seat; 31. Sealing box; 32. Rectangular slot; 4. Auxiliary sealing mechanism; 41. Elastic sealing strip; 411. Slideway; 42. Arc rod; 43. First slot; 44. First stopper; 45. Cylindrical airbag; 46. Air pipe; 51. Second stopper; 6. Auxiliary installation mechanism; 61. Slide rail; 62. Sealing rubber block; 63. Second slot; 64. Rectangular rubber block; 71. Limit rod; 81. Reference tube; 82. Positioning clamp. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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. Example

[0018] See also Figure 1-Figure 9As shown, the purpose of this embodiment is to provide an underwater sound-transmitting sealing structure, including an equipment body 1, a sound-transmitting cover 2 is installed on one side of the outer wall of the equipment body 1, a mounting seat 3 is fixedly connected to the outer wall of the equipment body 1, the mounting seat 3 is plugged with the sound-transmitting cover 2, the sound-transmitting cover 2 is connected and fixed to the equipment body 1 through the mounting seat 3, and oil is filled inside the sound-transmitting cover 2, and the sonar transducer is made watertight and sound-transmitting by oil sealing, three sealing boxes 31 are evenly fixedly connected to the top of the mounting seat 3, and an auxiliary sealing mechanism 4 is arranged inside the sealing box 31, The bottom of the cover 2 is fixedly connected with the same number of insertion rods 21 as that of the sealing box 31, and the insertion rods 21 are plugged into the auxiliary sealing mechanism 4. A positioning pin 23 is also fixedly connected to the bottom of the sound-transmitting cover 2 and on one side of the insertion rod 21. The top of the sealing box 31 is also provided with an auxiliary installation mechanism 6, and the positioning pin 23 is plugged into the auxiliary installation mechanism 6. The auxiliary sealing mechanism 4 is used to seal the gap between the sound-transmitting cover 2 and the equipment body 1 after the sound-transmitting cover 2 is combined with the mounting seat 3. The auxiliary installation mechanism 6 is used to accurately insert the insertion rod 21 into the sealing box 31 during the period when the sound-transmitting cover 2 is combined with the mounting seat 3.

[0019] The bottom end profile of the positioning pin 23 is conical, and the number of positioning pins 23 and the insertion rod 21 is the same. A rectangular groove 32 is provided on the inner wall at the top of the sealing box 31. The auxiliary installation mechanism 6 includes a slide rail 61 symmetrically fixedly connected to the top of the sealing box 31 and located on both sides of the rectangular groove 32. A sealing rubber block 62 is slidably connected between the inner walls of the two slide rails 61. The sealing rubber block 62 is located directly above the rectangular groove 32. A second slot 63 is provided on the inner wall at the center of the sealing rubber block 62. A rectangular rubber block 64 is fixedly connected to the inner wall of the top of the rectangular groove 32 and located directly below the slide rail 61. A reference cylinder 81 is also fixedly connected to the top of the sealing rubber block 62. The positioning pin 23 is plugged into the reference cylinder 81. The sealing box A positioning clip 82 is also fixedly connected to the top of 31 and located on one side of the reference tube 81. The inner contour of the top of the positioning clip 82 matches the outer wall contour of the reference tube 81. The reference tube 81 is engaged with the positioning clip 82 before the sealing rubber block 62 slides. Since the reference tube 81 is engaged with the positioning clip 82, the sealing rubber block 62 remains stationary inside the slide rail 61, and the second slot 63 is located above one side of the first limit block 44. When the sound-transmitting cover 2 approaches the mounting seat 3, the positioning pin 23 set at the bottom of the sound-transmitting cover 2 will gradually be inserted into the reference tube 81, which can facilitate the insertion rod 21 to be accurately inserted into the first slot 43 through the second slot 63, thereby playing a role in preliminary positioning. At the same time, the bottom end of the positioning pin 23 is conical. When the positioning pin 23 is just inserted into the reference tube 81, the angle gap between the bottom end of the positioning pin 23 and the reference tube 81 can be fine-tuned to ensure that the positioning pin 23 can be fully inserted therein. As the insertion rod 21 inserted into the first slot 43 follows the arc rod 42 to move toward the second limit block 51 inside the sealing box 31, the sealing rubber block 62 is used to slide inside the slide rail 61 to separate the reference tube 81 from the positioning clamp 82. Since the sealing rubber block 62 and the rectangular rubber block 64 are both made of rubber, and the surface area of ​​the sealing rubber block 62 exceeds that of the rectangular rubber block 64, the surface of the rectangular rubber block 64 is tightly fitted with the surface of the sealing rubber block 62 in the sliding state, and the rectangular rubber block 64 is used to seal the gap between the sealing rubber block 62 and the surface of the sealing box 31, thereby achieving the purpose of preventing leakage.

[0020] When the locking cam 72 is in the closed position, the locking cam 72 will be in the closed position, and the locking cam 72 will be in the closed position when the locking cam 72 is in the open position.

[0021] The auxiliary sealing mechanism 4 includes an elastic sealing strip 41 fixedly connected to the top of the mounting seat 3 and located between two adjacent sealing boxes 31, a cavity is provided inside the top of the elastic sealing strip 41, a slideway 411 is provided inside the bottom of the elastic sealing strip 41, an arc rod 42 is slidably connected inside the sealing box 31, one end of the arc rod 42 away from the sealing box 31 is slidably connected to the inside of the slideway 411, a first slot 43 is provided at one end of the arc rod 42 located inside the sealing box 31, the insertion rod 21 is plugged into the first slot 43, a first limiting block 44 is fixedly connected to the inner wall of the sealing box 31 on the side close to the first slot 43, a cylindrical airbag 45 is fixedly connected to the outer wall of the first limiting block 44 away from the first slot 43, and the outer wall of the cylindrical airbag 45 away from the first limiting block 44 is The wall is fixedly connected with an air pipe 46, and one end of the air pipe 46 away from the cylindrical airbag 45 is fixedly connected to the end of the elastic sealing strip 41, and the air pipe 46 is connected to the elastic sealing strip 41 and the inside of the cylindrical airbag 45. The end of the arc rod 42 close to the first slot 43 is made of magnetic material, and the end of the arc rod 42 located inside the slide 411 is made of plastic material. After sliding out of the slide 411, the plastic end of the arc rod 42 will continue to press the cylindrical airbag 45. The inner wall of the sealing box 31 on the side away from the first limit block 44 is also fixedly connected with a second limit block 51. The second limit block 51 and the first limit block 44 are both made of metal. The magnetic end of the arc rod 42 will produce a magnetic attraction reaction with the nearby side during the sliding between the second limit block 51 and the first limit block 44. In the initial state, the arc rod 42 and the first limit block 44 produce a magnetic attraction reaction. When the insertion rod 21 is inserted into the first slot 43 through the second slot 63, the arc rod 42 also produces a magnetic attraction reaction with the insertion rod 21, so that the insertion rod 21 and the magnetic material end of the arc rod 42 are firmly combined, preventing the insertion rod 21 from being separated from the first slot 43 without the action of external force, and playing a role of preliminary fixation. Then, the sound-permeable cover 2 is rotated, so that the insertion rod 21 rotates synchronously with the sound-permeable cover 2 inside the sealing box 31, so that the insertion rod 21 and the magnetic material end of the arc rod 42 are separated from the first limit block 44 and produce a magnetic attraction reaction with the second limit block 51, and as the arc rod 42 slides inside the sealing box 31, one end of the plastic material moves inside the slide 411 toward the side of the cylindrical airbag 45.The curved rod 42 at one end of the plastic material can be used to lift the elastic sealing strip 41 inside the slide 411, so that the top part of the elastic sealing strip 41 can quickly contact the bottom of the sound-transmitting cover 2 after the height is raised. At the same time, the plastic end of the curved rod 42 will continue to press the cylindrical airbag 45 during the movement, so that after the cylindrical airbag 45 is pressed, its internal space is compressed and gas is simultaneously generated through the air pipe 46 to be filled into the cavity opened inside the top of the elastic sealing strip 41. Combined with the soft rubber characteristics of the elastic sealing strip 41, the top part of the elastic sealing strip 41 gradually expands, and then it can play a role in sealing the gap between the sound-transmitting cover 2 and the mounting seat 3, so that the sealing effect is improved, and the sound-transmitting cover 2 is prevented from leaking through the gap due to poor sealing during the installation and use of the equipment body 1 through the mounting seat 3.

[0022] Compared with the traditional sealing structure, the first advantage is that when the sound-transmitting cover 2 is not combined with the mounting base 3, the elastic sealing strip 41 is in an incomplete state, and the plastic end of the arc rod 42 slides inside the slide 411, so that the internal area of ​​the slide 411 passed by the plastic end of the arc rod 42 will be lifted under the lifting action of the arc rod 42, so that the top part of the elastic sealing strip 41 can quickly contact the bottom of the sound-transmitting cover 2 after the height is lifted. At the same time, the plastic end of the arc rod 42 will continue to press the cylindrical airbag 45 during the movement, so that after the cylindrical airbag 45 is pressed, the gas generated is filled into the cavity opened inside the top of the elastic sealing strip 41 through the air pipe 46, and combined with the soft rubber characteristics of the elastic sealing strip 41, the top part of the elastic sealing strip 41 gradually expands and fills the entire gap. This can seal the gap between the sound-transmitting cover 2 and the mounting base 3, thereby improving the sealing effect and preventing the oil inside the sound-transmitting cover 2 from leaking through the gap due to poor sealing, thereby extending the service life of the sound-transmitting cover 2.

[0023] Advantage 2: By inserting the limiting rod 71 into the fixing groove 22, the rod 21 is laterally fixed. When the arc rod 42 and the second limiting block 51 are not separated, the rod 21 will always be combined with the limiting rod 71, so that the sound-permeable cover 2 and the mounting seat 3 are more firmly combined. Compared with the traditional bonding installation, this installation method can not only save the time spent on installation, but also make the installation operation more convenient. At the same time, when disassembly and maintenance are required, it is only necessary to rotate the sound-permeable cover 2 and the mounting seat 3 in opposite directions, which improves the flexibility of use.

[0024] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An underwater sound-transmitting sealing structure, comprising a device body (1), a sound-transmitting cover (2) being mounted on one side of an outer wall of the device body (1), characterized in that: The outer wall of the device body (1) is fixedly connected to a mounting seat (3), the mounting seat (3) is plugged into the sound-transmitting cover (2), three sealing boxes (31) are evenly fixedly connected to the top of the mounting seat (3), and auxiliary sealing mechanisms (4) are arranged inside the sealing boxes (31), and the bottom of the sound-transmitting cover (2) is fixedly connected to the same number of plug rods (21) as the number of the sealing boxes (31), and the plug rods (21) are plugged into the auxiliary sealing mechanisms (4), and the bottom of the sound-transmitting cover (2) and located at the plug rods (21) ) is also fixedly connected to one side thereof with a positioning pin (23); an auxiliary mounting mechanism (6) is also provided on the top of the sealing box (31); the positioning pin (23) and the auxiliary mounting mechanism (6) are plugged into each other; the auxiliary sealing mechanism (4) is used to seal the gap between the sound-transmitting cover (2) and the device body (1) after the sound-transmitting cover (2) and the mounting seat (3) are combined; the auxiliary mounting mechanism (6) is used to accurately insert the insertion rod (21) into the interior of the sealing box (31) during the period when the sound-transmitting cover (2) and the mounting seat (3) are combined.

2. The underwater sound-permeable sealing structure according to claim 1, characterized in that: The auxiliary sealing mechanism (4) comprises an elastic sealing strip (41) fixedly connected to the top of the mounting seat (3) and located between two adjacent sealing boxes (31); a cavity is provided inside the top end of the elastic sealing strip (41); a slideway (411) is provided inside the bottom end of the elastic sealing strip (41); an arc-shaped rod (42) is slidably connected inside the sealing box (31); one end of the arc-shaped rod (42) away from the sealing box (31) is slidably connected inside the slideway (411); one end of the arc-shaped rod (42) located inside the sealing box (31) is provided with a first slot (43); and the insertion rod (21) The sealing box (31) is plugged into and matched with the first slot (43). The inner wall of the sealing box (31) close to the first slot (43) is fixedly connected to a first limiting block (44). The outer wall of the first limiting block (44) away from the first slot (43) is fixedly connected to a cylindrical air bag (45). The outer wall of the cylindrical air bag (45) away from the first limiting block (44) is fixedly connected to an air pipe (46). The end of the air pipe (46) away from the cylindrical air bag (45) is fixedly connected to the end of the elastic sealing strip (41). The air pipe (46) is connected to the elastic sealing strip (41) and the inside of the cylindrical air bag (45).

3. The underwater sound-permeable sealing structure according to claim 2, characterized in that: One end of the arc-shaped rod (42) close to the first slot (43) is made of magnetic material, and one end of the arc-shaped rod (42) located inside the slideway (411) is made of plastic material. After the plastic end of the arc-shaped rod (42) slides out of the slideway (411), it will continue to press the cylindrical airbag (45).

4. The underwater sound-permeable sealing structure according to claim 2, characterized in that: A second limit block (51) is fixedly connected to the inner wall of the sealing box (31) on the side away from the first limit block (44); the second limit block (51) and the first limit block (44) are both made of metal; and one end of the arc-shaped rod (42) made of magnetic material will generate a magnetic attraction reaction with the adjacent side during the sliding between the second limit block (51) and the first limit block (44).

5. The underwater sound-permeable sealing structure according to claim 1, characterized in that: The bottom end profile of the positioning pin (23) is conical, and the number of the positioning pins (23) and the number of the insertion rods (21) are the same.

6. The underwater sound-permeable sealing structure according to claim 1, characterized in that: A rectangular groove (32) is formed on the inner wall at the top of the sealing box (31); the auxiliary mounting mechanism (6) comprises slide rails (61) symmetrically fixedly connected to the top of the sealing box (31) and located on both sides of the rectangular groove (32); a sealing rubber block (62) is slidably connected between the inner walls of the two slide rails (61); the sealing rubber block (62) is located directly above the rectangular groove (32); a second slot (63) is formed on the inner wall at the center of the sealing rubber block (62); a rectangular rubber block (64) is fixedly connected to the inner wall at the top of the rectangular groove (32) and located directly below the slide rail (61); a reference tube (81) is also fixedly connected to the top of the sealing rubber block (62); the positioning pin (23) is plugged into and matched with the reference tube (81).

7. The underwater sound-permeable sealing structure according to claim 6, characterized in that: A positioning clip (82) is fixedly connected to the top of the sealing box (31) and located on one side of the reference tube (81). The inner contour of the top of the positioning clip (82) matches the outer wall contour of the reference tube (81). The reference tube (81) is engaged with the positioning clip (82) before the sealing rubber block (62) slides.

8. The underwater sound-permeable sealing structure according to claim 6, characterized in that: A fixing groove (22) is formed on the inner wall of the bottom end of the insertion rod (21), a limiting rod (71) is fixedly connected to the inner wall of the rectangular groove (32), and the end of the limiting rod (71) is plugged into and matched with the fixing groove (22).

Images