A ship underwater detection device

Abstract

The present invention relates to the field of underwater ship detection technology, and specifically to an underwater ship detection device, comprising a fixed plate, the bottom of which is connected to an underwater sonar device via a connecting rod, and a cleaning mechanism provided on one side of the underwater sonar device. The cleaning mechanism comprises a first connecting bar, an extrusion block, a hollow bar, and a second connecting plate driven by a motor. The second connecting plate is provided with a first cleaning brush and a second cleaning brush, which are driven up and down by a motor to remove dirt and impurities from the surface of the underwater sonar device. Waterproof cylinders are provided at the four corners of the bottom of the fixed plate, and the waterproof cylinders are connected to a protective shell via a connecting block. The protective shell can move up and down to cover or expose the underwater sonar device, thereby enhancing stability. The present invention solves the problems of underwater sonar devices being prone to impurities and lacking stability, thereby improving detection accuracy and reliability.

Description

Technical Field

[0001] The present invention relates to the technical field of underwater ship detection, and in particular to an underwater ship detection device. Background Art

[0002] Ship is a general term for various vessels. A ship is a means of transport that can sail or anchor in waters for transportation or operations. It has different technical performance, equipment, and structural types according to different usage requirements. A ship is a man-made means of transport that mainly operates in geographical waters. When a ship is traveling on the water, it needs to use sonar for detection to effectively identify and locate underwater objects such as submarines, schools of fish, and reefs to prevent the ship from colliding with reefs.

[0003] After searching, a Chinese patent with the publication number CN215794361U discloses a device for underwater inspection of ships. When the ship needs to conduct underwater inspection while it is sailing, specifically, the controller controls the first motor to start, the first motor drives the gear to rotate, the gear and the moving frame are engaged, and when the gear rotates forward, the moving frame is driven to move downward, and the sonar is driven downward by the connecting rod, and the first slide plate and the second slide plate slide downward in the slide groove. When the first slide plate and the second slide plate move downward, the first transmission rope and the second transmission rope are subjected to force, pulling the first cover plate to move leftward along the slide rail and pulling the second cover plate to move rightward along the slide rail, compressing the first spring and the second spring, thereby exposing the first through hole on the slide rail. Therefore, the sonar moves downward through the first through hole. At this time, the controller controls the second motor to start, and the second motor drives the sonar to rotate, so that the sonar rotates in the water for detection. When underwater inspection is not needed, the pushing device drives the sonar to move upward, so that the sonar is set in the shell;

[0004] However, the following problems still exist:

[0005] 1. The gears drive the moving frame downward, which in turn drives the sonar downward, allowing the sonar to be placed in the water for detection. However, when the sonar moves with the ship in the water, the sonar device itself is prone to adhesion of impurities such as dirt, marine organisms, and silt. These impurities will affect the normal use of the sonar and reduce the detection effect.

[0006] 2. The sonar is protected by a shell, but because the shell is fixed and the sonar is mobile, the sonar is not stable enough on the bottom of the ship.

[0007] In view of this, we propose a ship underwater detection device. Summary of the Invention

[0008] The object of the present invention is to provide a ship underwater detection device to solve the problems raised in the above background technology.

[0009] To achieve the above object, the present invention provides the following technical solutions:

[0010] A ship underwater detection device includes a fixed plate, the bottom of the fixed plate is fixedly connected to a connecting rod, the bottom of the connecting rod is fixedly connected to an underwater sonar device, and a cleaning mechanism is provided on one side of the underwater sonar device; the four corners of the bottom of the fixed plate are fixedly connected to a waterproof cylinder, the bottom of the waterproof cylinder is fixedly connected to a connecting block, and the top of the connecting block is fixedly connected to a protective shell.

[0011] Preferably, the cleaning mechanism includes a first connecting plate, the top of the first connecting plate is fixedly connected to the bottom of the fixed plate, a motor is fixedly installed on the first connecting plate, the output shaft of the motor is fixedly connected to the first connecting bar, one side of the first connecting bar is fixedly connected to an extrusion block, the surface of the extrusion block is provided with a hollow bar, the bottom of the hollow bar is fixedly connected to a second connecting bar, the bottom of the second connecting bar is fixedly connected to a second connecting plate, the second connecting plate is symmetrically provided with a first cleaning brush and a second cleaning brush on a side close to the underwater sonar device, the bottom of the fixed plate is fixedly connected to a limiting rod, both ends of the hollow bar are fixedly connected to sliders, and the inner cavity of the slider is slidably connected to the surface of the limiting rod.

[0012] Preferably, the top of the first cleaning brush and the second cleaning brush away from the hollow bar is fixedly connected to an n-shaped plate, the side of the n-shaped plate close to the hollow bar is fixedly connected to a reinforcement bar, and the other end of the reinforcement bar is fixedly connected to one side of the hollow bar.

[0013] Preferably, the two ends of the second connecting plate are fixedly connected to the first hollow blocks, the ends of the first cleaning brush and the second cleaning brush close to the second connecting plate are respectively fixedly connected to the second hollow blocks, and the inner cavities of the first hollow block and the second hollow block are threadedly connected with bolts.

[0014] Preferably, the inner cavity of the protective shell is fixedly connected to the bottom plate, and the surfaces of the protective shell and the bottom plate are both provided with a first through hole.

[0015] Preferably, a streamlined air deflector is fixedly mounted on one side of the protective shell, second through holes are evenly opened on the air deflector, and an anti-fouling coating is coated on the outer side of the air deflector.

[0016] Preferably, a cutting assembly is provided inside the deflector, and the cutting assembly includes a waterproof electric cylinder, a cutting plate, and a cutting knife. The waterproof electric cylinder is fixedly installed on the top of the outer wall of the protective shell close to the deflector through a mounting bracket, and the output end of the waterproof electric cylinder is fixedly connected to the cutting plate, and a cutting knife is fixedly installed on the bottom of the cutting plate. Guide grooves are symmetrically opened inside the deflector, and the two ends of the cutting plate are slidably arranged in the guide grooves. An underwater camera is provided on the top wall inside the deflector, and the underwater camera is electrically connected to the control device inside the hull.

[0017] Preferably, a hollow groove is provided on the surface of the second connecting plate, and a third cleaning brush is fixedly installed in the inner cavity of the hollow groove.

[0018] Preferably, a waterproof shell is provided on the surface of the motor, and the bottom of the waterproof shell is fixedly connected to the inner cavity of the first connecting plate.

[0019] Preferably, a fixing rod is fixedly connected to the surface of the underwater sonar device, the top of the fixing rod is fixedly connected to the bottom of the fixing plate, the fixing rod is symmetrically arranged in a V shape, and the middle part of the fixing rod is fixedly connected to the surface of the connecting rod.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The underwater detection device for ships drives the first connecting bar to rotate through a motor, and the first connecting bar drives the hollow bar to perform circular motion through an extrusion block. At the same time, the hollow bar drives the second connecting bar and the second connecting plate to move together, and the second connecting plate drives the first cleaning brush and the second cleaning brush to move together, thereby cleaning impurities on the surface of the underwater sonar device, so that the impurities will not affect the normal use of the underwater sonar device, and solves the problem that when the underwater sonar device moves with the ship in the water, the underwater sonar device itself is easily adhered to impurities such as dirt, marine organisms and mud, which will affect the normal use of the underwater sonar device and reduce the detection effect.

[0022] 2. The waterproof cylinder of the ship's underwater detection device drives the protective shell to move downward through the connecting block, allowing the underwater sonar device to perform detection normally. This solves the problem that the protective shell is fixed while the underwater sonar device moves, resulting in the underwater sonar device being unstable on the bottom of the ship.

[0023] 3. The ship underwater detection device is connected to the inside of the first hollow block and the second hollow block by bolts, thereby connecting the second connecting plate and the first cleaning brush and the second cleaning brush, making it convenient to disassemble the first cleaning brush and the second cleaning brush. The third cleaning brush is driven up and down by the hollow groove to clean one side of the underwater sonar device and improve the cleaning range.

[0024] 4. The ship's underwater detection device blocks the bottom of the protective shell through the bottom plate, making it difficult for active animals such as fish to enter the interior of the protective shell, thereby preventing the fish from damaging the underwater sonar device.

[0025] 5. The ship's underwater detection device effectively reduces the risk of entanglement with debris such as fishing nets and aquatic plants through the design of a streamlined fairing and anti-fouling coating, optimizes the direction of water flow, and avoids the formation of vortexes. The setting of the cutting component can quickly cut off debris with a cutting knife when it enters the fairing, preventing entanglement and blockage. The underwater camera monitors the internal situation of the fairing in real time, facilitating timely problem handling. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 It is a cross-sectional view of the overall structure of the present invention;

[0028] Figure 3 Schematic diagram of the three-dimensional structure of the n-shaped plate in the present invention;

[0029] Figure 4 This is a schematic diagram of the cross-sectional structure of the waterproof housing of the present invention;

[0030] Figure 5 Schematic diagram of the three-dimensional structure of the limiting rod in the present invention;

[0031] Figure 6 Schematic diagram of the connection structure of the first hollow block and the second hollow block in the present invention;

[0032] Figure 7 Schematic diagram of the overall structure of the air guide cover in the present invention;

[0033] Figure 8 Schematic diagram of the internal structure of the air guide cover in the present invention.

[0034] In the figure: 1. fixing plate; 2. connecting rod; 3. underwater sonar device; 4. cleaning mechanism; 401. first connecting plate; 402. motor; 403. first connecting strip; 404. extrusion block; 405. hollow strip; 406. second connecting strip; 407. second connecting plate; 408. first cleaning brush; 409. second cleaning brush; 410. slider; 411. limiting rod; 5. waterproof cylinder; 6. connecting block; 7. protective shell; 71. deflector; 711. guide groove; 712. underwater camera; 72. second through hole; 73. waterproof electric cylinder; 74. cutting plate; 75. cutting knife; 8. N-shaped plate; 9. reinforcement strip; 10. first hollow block; 11. second hollow block; 12. bolt; 13. bottom plate; 14. first through hole; 15. waterproof shell; 16. fixing rod; 17. hollow groove; 18. third cleaning brush. DETAILED DESCRIPTION

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0036] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0037] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," and "disposed" should be understood in a broad sense. For example, they may refer to fixed connection or disposition, detachable connection or disposition, or integral connection or disposition. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "several" means two or more, unless otherwise specifically defined.

[0039] Example 1: Please refer to Figures 1-6 As shown, the present invention provides a technical solution:

[0040] A ship underwater detection device includes a fixing plate 1, a connecting rod 2 is fixedly connected to the bottom of the fixing plate 1, an underwater sonar device 3 is fixedly connected to the bottom of the connecting rod 2, and a cleaning mechanism 4 is provided on one side of the underwater sonar device 3;

[0041] Furthermore, the cleaning mechanism 4 includes a first connecting plate 401, the top of the first connecting plate 401 is fixedly connected to the bottom of the fixed plate 1, a motor 402 is fixedly mounted on the first connecting plate 401, the output shaft of the motor 402 is fixedly connected to a first connecting bar 403, one side of the first connecting bar 403 is fixedly connected to an extrusion block 404, a hollow bar 405 is provided on the surface of the extrusion block 404, the bottom of the hollow bar 405 is fixedly connected to a second connecting bar 406, the bottom of the second connecting bar 406 is fixedly connected to a second connecting plate 407, a first cleaning brush 408 and a second cleaning brush 409 are symmetrically provided on one side of the second connecting plate 407 close to the underwater sonar device 3, the bottom of the fixed plate 1 is fixedly connected to a limiting rod 411, both ends of the hollow bar 405 are fixedly connected to a slider 410, and the inner cavity of the slider 410 is slidably connected to the surface of the limiting rod 411;

[0042] It should be noted that the fixing plate 1 can be welded to the bottom of the ship, and the fixing plate 1 can also be connected to the underwater sonar device 3 through the connecting rod 2, so that the underwater sonar device 3 can also be located at the bottom of the ship to detect the water body and avoid collision with objects such as fish and reefs. The first connecting plate 401 is connected to the bottom of the fixing plate 1 and can be used to support the motor 402, and the motor 402 can drive the first connecting bar 403 to rotate. The extrusion block 404 is fixed to one side of the first connecting bar 403 and is in a Z shape with the first connecting bar 403 and the motor 402, so that the motor 402 can drive the extrusion block 404 to perform a circular motion. When the extrusion block 404 rotates, it can be used to drive the hollow bar 405 to move up and down. The second connecting bar 406 can The hollow bar 405 is connected to the second connecting plate 407 so that the second connecting plate 407 can move up and down. One side of the second connecting plate 407 is connected to the first cleaning brush 408 and the second cleaning brush 409, and the first cleaning brush 408 and the second cleaning brush 409 are respectively located on both sides of the underwater sonar device 3, so that when the first cleaning brush 408 and the second cleaning brush 409 are driven by the second connecting plate 407 to move up and down, they can clean impurities adhered to the surface of the underwater sonar device 3, thereby preventing the impurities from affecting the normal use of the underwater sonar device 3. The limiting rod 411 can limit the hollow bar 405 through the slider 410, so that when the extrusion block 404 squeezes the hollow bar 405 to move, the hollow bar 405 is not easily offset.

[0043] It is worth noting that, in this technical solution, both the first cleaning brush 408 and the second cleaning brush 409 use deformable brush heads, which can better adapt to the unevenness of the surface of the sonar device and improve cleaning efficiency.

[0044] In this embodiment, the four corners of the bottom of the fixing plate 1 are fixedly connected to the waterproof cylinder 5, the bottom of the waterproof cylinder 5 is fixedly connected to the connecting block 6, and the top of the connecting block 6 is fixedly connected to the protective shell 7;

[0045] The waterproof cylinder 5 can be connected to the protective shell 7 through the connecting block 6, so that the protective shell 7 can be moved up and down to the surface of the underwater sonar device 3, thereby protecting the underwater sonar device 3. At the same time, the waterproof cylinder 5 can also drive the protective shell 7 to move downward, so that the underwater sonar device 3 can perform detection normally. At the same time, the underwater sonar device 3 does not need to be moved, making the underwater sonar device 3 more stable on the fixing plate 1 and the bottom of the ship.

[0046] In this embodiment, an n-shaped plate 8 is fixedly connected to the top of one end of the first cleaning brush 408 and the second cleaning brush 409 away from the hollow bar 405. A reinforcing bar 9 is fixedly connected to the side of the n-shaped plate 8 close to the hollow bar 405. The other end of the reinforcing bar 9 is fixedly connected to one side of the hollow bar 405.

[0047] The n-shaped plate 8 can connect the first cleaning brush 408 and the second cleaning brush 409, making the first cleaning brush 408 and the second cleaning brush 409 less likely to shake and more stable, while the reinforcement bar 9 can connect the hollow bar 405 and the n-shaped plate 8, so that the n-shaped plate 8 can be stabilized on the upper side of the first cleaning brush 408 and the second cleaning brush 409.

[0048] In this embodiment, the first hollow blocks 10 are fixedly connected to both ends of the second connecting plate 407, and the first cleaning brush 408 and the second cleaning brush 409 are fixedly connected to the second hollow blocks 11 at their ends close to the second connecting plate 407. The inner cavities of the first hollow blocks 10 and the second hollow blocks 11 are threadedly connected with bolts 12.

[0049] The bolt 12 can be connected to the inside of the first hollow block 10 and the second hollow block 11 to connect the second connecting plate 407 and the first cleaning brush 408 and the second cleaning brush 409. At the same time, the bolt 12 can also be rotated out of the first hollow block 10 and the second hollow block 11, thereby facilitating the disassembly of the first cleaning brush 408 and the second cleaning brush 409.

[0050] In this embodiment, the inner cavity of the protective shell 7 is fixedly connected to the bottom plate 13, and the surfaces of the protective shell 7 and the bottom plate 13 are both provided with a first through hole 14;

[0051] It should be noted that the bottom plate 13 can be used to block the bottom of the protective shell 7, making it difficult for active animals such as fish to enter the interior of the protective shell 7, and thus not easily causing damage to the underwater sonar device 3, while the first through hole 14 facilitates the free flow of water inside the protective shell 7.

[0052] In this embodiment, a hollow groove 17 is formed on the surface of the second connecting plate 407, and a third cleaning brush 18 is fixedly installed in the inner cavity of the hollow groove 17;

[0053] The interior of the hollow groove 17 can be used to install the third cleaning brush 18, and the third cleaning brush 18 can be driven by the second connecting plate 407 to move up and down, so as to clean one side of the underwater sonar device 3 and increase the cleaning range.

[0054] In this embodiment, a waterproof shell 15 is provided on the surface of the motor 402, and the bottom of the waterproof shell 15 is fixedly connected to the inner cavity of the first connecting plate 401;

[0055] The waterproof shell 15 can protect the motor 402 so that the motor 402 is not easily penetrated by water and is not easily damaged.

[0056] In this embodiment, a fixing rod 16 is fixedly connected to the surface of the underwater sonar device 3, and the top of the fixing rod 16 is fixedly connected to the bottom of the fixing plate 1;

[0057] Furthermore, the fixing rod 16 is symmetrically arranged in a V shape, and the middle portion of the fixing rod 16 is fixedly connected to the surface of the connecting rod 2;

[0058] The fixing rod 16 is symmetrically arranged in a V shape. The upper and lower sides and the middle part of the fixing rod 16 are respectively connected to the surfaces of the fixing plate 1, the underwater sonar device 3 and the connecting rod 2, which can reinforce the connection between the fixing plate 1, the underwater sonar device 3 and the connecting rod 2, making the underwater sonar device 3 more firmly attached to the bottom of the connecting rod 2.

[0059] When the underwater detection device of the present embodiment is in use, the fixing plate 1 is first welded to the bottom of the ship so that the underwater sonar device 3 can also be stabilized on the lower side of the ship. Then, the underwater sonar device 3 can detect the water to prevent the ship from colliding with objects such as fish and reefs. When impurities adhere to the underwater sonar device 3 in the water, the motor 402 can be started first to drive the first connecting bar 403 to rotate. The first connecting bar 403 will drive the hollow bar 405 to perform circular motion through the extrusion block 404. At the same time, the hollow bar 405 will drive the second connecting bar 406 and the second connecting plate 407 to move together. At the same time, the hollow bar 405 will also drive the slider 410 to slide on the surface of the limit rod 411. When the second connecting plate 407 moves, it will drive the first cleaning brush 408 and the second cleaning brush 409 to move together. The first cleaning brush 408 and the second cleaning brush 409 will move on the surface of the underwater sonar device 3 to clean the impurities adhered to the surface of the underwater sonar device 3, thereby preventing the impurities from affecting the normal use of the underwater sonar device 3.

[0060] When the underwater sonar device 3 is not in use, the waterproof cylinder 5 can be started to drive the protective shell 7 to move upward through the connecting block 6 to protect the underwater sonar device 3. When the underwater sonar device 3 is in use for detection, the waterproof cylinder 5 can also drive the protective shell 7 to move downward, so as not to block the underwater sonar device 3, allowing the underwater sonar device 3 to perform detection normally. At the same time, the underwater sonar device 3 does not need to be moved, making the underwater sonar device 3 more stable on the fixing plate 1 and the bottom of the ship. This can solve the problem that when the underwater sonar device 3 moves with the ship in the water, the underwater sonar device 3 itself is easily adhered to impurities such as dirt, marine organisms and mud and sand. These impurities will affect the normal use of the underwater sonar device 3 and reduce the detection effect.

[0061] Example 2: Based on Example 1, refer to Figure 7 、 8 A streamlined air guide cover 71 is fixedly mounted on one side of the protective shell 7. Second through holes 72 are evenly opened on the air guide cover 71. The outer side of the air guide cover 71 is coated with an anti-fouling coating.

[0062] When in use, the deflector 71 is installed near the bow. The streamlined design of the deflector 71 reduces protrusions to prevent snagging of fishing nets or aquatic plants. It also optimizes the direction of water flow, reduces eddy currents, and prevents the accumulation and entanglement of debris. The anti-fouling coating uses a low-friction polytetrafluoroethylene or silicone-based coating to reduce adhesion and friction coefficient, making it easier for entangled objects to slip off. Water can then flow normally into the protective shell 7 through the second through-hole 72 and the first through-hole 14. To further reduce the ingress of debris, anti-entanglement grids can be installed at the first through-hole 14 and the second through-hole 72, allowing water to pass but blocking the entry of larger debris.

[0063] Furthermore, a cutting assembly is provided inside the fairing 71, and the cutting assembly includes a waterproof electric cylinder 73, a cutting plate 74, and a cutting knife 75. The waterproof electric cylinder 73 is fixedly installed on the top of the outer wall of the protective shell 7 close to the fairing 71 through a mounting frame, and the output end of the waterproof electric cylinder 73 is fixedly connected to the cutting plate 74. The cutting knife 75 is fixedly installed on the bottom of the cutting plate 74. Guide grooves 711 are symmetrically provided inside the fairing 71, and the two ends of the cutting plate 74 are slidably arranged in the guide grooves 711. An underwater camera 712 is provided on the top wall of the fairing 71, and the underwater camera 712 is electrically connected to the control device inside the hull.

[0064] The internal situation of the fairing 71 can be monitored through the underwater camera 712, and the real-time monitoring image can be transmitted to the control device inside the hull. The staff can monitor the internal situation of the fairing 71 in real time. When water plants and other debris enter the fairing 71, the waterproof electric cylinder 73 can be started to drive the cutting plate 74 to move up and down, thereby controlling the cutting knife 75 to reciprocate to cut the water plants, preventing water plants and other debris from getting entangled inside the fairing 71.

[0065] 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 to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A ship underwater detection device, comprising a fixing plate (1), characterized in that: The bottom of the fixing plate (1) is fixedly connected to a connecting rod (2), the bottom of the connecting rod (2) is fixedly connected to an underwater sonar device (3), a cleaning mechanism (4) is provided on one side of the underwater sonar device (3), the four corners of the bottom of the fixing plate (1) are fixedly connected to a waterproof cylinder (5), the bottom of the waterproof cylinder (5) is fixedly connected to a connecting block (6), and the top of the connecting block (6) is fixedly connected to a protective shell (7); The cleaning mechanism (4) comprises a first connecting plate (401), the top of the first connecting plate (401) is fixedly connected to the bottom of the fixed plate (1), a motor (402) is fixedly mounted on the first connecting plate (401), an output shaft of the motor (402) is fixedly connected to a first connecting bar (403), one side of the first connecting bar (403) is fixedly connected to an extrusion block (404), a hollow bar (405) is provided on the surface of the extrusion block (404), and the bottom of the hollow bar (405) is fixedly connected to the first connecting bar (403). A second connecting bar (406) is connected, the bottom of the second connecting bar (406) is fixedly connected to a second connecting plate (407), a first cleaning brush (408) and a second cleaning brush (409) are symmetrically provided on one side of the second connecting plate (407) close to the underwater sonar device (3), the bottom of the fixed plate (1) is fixedly connected to a limiting rod (411), both ends of the hollow bar (405) are fixedly connected to sliders (410), and the inner cavity of the slider (410) is slidably connected to the surface of the limiting rod (411); The top of one end of the first cleaning brush (408) and the second cleaning brush (409) away from the hollow bar (405) is fixedly connected to an n-shaped plate (8), and the side of the n-shaped plate (8) close to the hollow bar (405) is fixedly connected to a reinforcement bar (9), and the other end of the reinforcement bar (9) is fixedly connected to one side of the hollow bar (405).

2. The underwater ship detection device according to claim 1, characterized in that: The two ends of the second connecting plate (407) are fixedly connected to the first hollow block (10), and the ends of the first cleaning brush (408) and the second cleaning brush (409) close to the second connecting plate (407) are respectively fixedly connected to the second hollow block (11), and the inner cavities of the first hollow block (10) and the second hollow block (11) are threadedly connected with bolts (12).

3. The underwater ship detection device according to claim 1, characterized in that: The inner cavity of the protective shell (7) is fixedly connected to a bottom plate (13), and the surfaces of the protective shell (7) and the bottom plate (13) are both provided with a first through hole (14).

4. The underwater ship detection device according to claim 1, characterized in that: A streamlined air deflector (71) is fixedly mounted on one side of the protective shell (7), second through holes (72) are evenly formed on the air deflector (71), and an anti-fouling coating is coated on the outside of the air deflector (71).

5. The underwater ship detection device according to claim 4, characterized in that: A cutting assembly is provided inside the deflector (71), and the cutting assembly includes a waterproof electric cylinder (73), a cutting plate (74), and a cutting knife (75). The waterproof electric cylinder (73) is fixedly mounted on the top of the outer wall of the protective shell (7) near the deflector (71) through a mounting frame. The output end of the waterproof electric cylinder (73) is fixedly connected to the cutting plate (74). The cutting knife (75) is fixedly mounted on the bottom of the cutting plate (74). Guide grooves (711) are symmetrically provided inside the deflector (71). Both ends of the cutting plate (74) are slidably arranged in the guide grooves (711). An underwater camera (712) is provided on the top wall of the deflector (71), and the underwater camera (712) is electrically connected to a control device inside the hull.

6. The underwater ship detection device according to claim 1, characterized in that: A hollow groove (17) is provided on the surface of the second connecting plate (407), and a third cleaning brush (18) is fixedly provided in the inner cavity of the hollow groove (17).

7. The underwater ship detection device according to claim 1, characterized in that: A waterproof shell (15) is provided on the surface of the motor (402), and the bottom of the waterproof shell (15) is fixedly connected to the inner cavity of the first connecting plate (401).

8. The underwater ship detection device according to claim 1, characterized in that: A fixing rod (16) is fixedly connected to the surface of the underwater sonar device (3), the top of the fixing rod (16) is fixedly connected to the bottom of the fixing plate (1), the fixing rod (16) is symmetrically arranged in a V shape, and the middle of the fixing rod (16) is fixedly connected to the surface of the connecting rod (2).

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