Doppler log convenient to replace

Abstract

The utility model relates to a Doppler log convenient to replace, and relates to the field of Doppler log, the Doppler log comprises a connecting cylinder used for being connected with a ship body and a transducer, the top of the connecting cylinder is closed, the top of the transducer is inserted into the connecting cylinder from a bottom opening of the connecting cylinder, and the transducer is arranged in the connecting cylinder. A plurality of groups of limiting assemblies for radially limiting the energy converter are arranged in the connecting cylinder, and a plugging piece for plugging a gap between the connecting cylinder and the energy converter is arranged between the connecting cylinder and the energy converter. The sealing device has the advantages of being good in sealing performance, free of tools and convenient to replace.

Description

Technical Field

[0001] This application relates to the field of Doppler logs, and more particularly to a Doppler log that is easy to replace. Background Technology

[0002] A Doppler Velocity Log (DVL) is a navigation device that uses the Doppler effect to measure the speed and range of ships or underwater vehicles. When sound waves are emitted from a moving hull to the seabed (or water column) and reflected back, the frequency of the reflected wave changes due to the relative motion between the hull and the reflecting surface. The frequency increases as the hull moves forward and decreases as it moves backward. By measuring the frequency difference between the emitted sound wave and the received echo, and combining this with the speed of sound, the speed of the hull relative to the seabed or water column can be calculated.

[0003] The structure of a Doppler log includes a transducer array (mounted on the bottom of the ship, emitting sound waves (usually 4 beams) in different directions at a specific angle (e.g., 30°) to cover the forward, aft, left, and right directions), a signal processing unit (analyzing echo frequency changes and calculating velocity vectors), and an integrated display output interface for providing real-time speed and range data into the navigation system.

[0004] Since the transducer is exposed to the seawater environment for a long time, its sensitivity may decrease due to corrosion, biological adhesion or mechanical wear. If cleaning and maintenance cannot restore its performance, it needs to be replaced. Utility Model Content

[0005] To address the aforementioned issues, this application provides a Doppler log that is easy to replace.

[0006] The Doppler log that is easy to replace provided in this application adopts the following technical solution:

[0007] A replaceable Doppler log includes a connecting cylinder for connection to a ship's hull and a transducer. The top of the connecting cylinder is closed, and the top of the transducer is inserted into the connecting cylinder through an opening at the bottom of the connecting cylinder. The connecting cylinder is provided with a plurality of limiting components for radially limiting the transducer. A sealing member is provided between the connecting cylinder and the transducer to seal the gap between the connecting cylinder and the transducer.

[0008] Furthermore, the limiting component includes a first connecting rod and a second connecting rod. The first connecting rod moves along a direction parallel to the axis of the connecting cylinder, and the second connecting rod slides along a direction perpendicular to the axis of the connecting cylinder via a sliding member. A first inclined surface is provided at the bottom of the first connecting rod, and a second inclined surface is provided at the end of the second connecting rod near the first connecting rod. The first inclined surface and the second inclined surface are in contact with each other. The distance from the first inclined surface to the top of the connecting cylinder increases from the end away from the axis of the connecting cylinder to the end near the axis of the connecting cylinder. A dovetail block is provided on the first inclined surface, and the extension direction of the dovetail block is parallel to the extension direction of the inclined surface. A dovetail groove for accommodating the dovetail block is provided on the second inclined surface. A slot for inserting the second connecting rod is provided on the peripheral wall of the transducer. The slot is arc-shaped, and the axis of the slot is collinear with the axis of the connecting cylinder.

[0009] Furthermore, a crossbar is provided at the top of the first connecting rod, and a first groove and a second groove are provided at the top of the transducer. The first groove and the second groove are connected. The second groove is arc-shaped, and the axis of the second groove is collinear with the axis of the connecting cylinder. The extension direction of the second groove is the same as the extension direction of the slot.

[0010] Furthermore, a spring is provided between the crossbar and the inner top wall of the connecting cylinder.

[0011] Furthermore, the sliding component includes a slide rail and a slider, one end of the slide rail is fixedly connected to the inner wall of the connecting cylinder, and the extension direction of the slide rail is perpendicular to the axial direction of the connecting cylinder.

[0012] Furthermore, the sealing element includes an outer sealing strip and an inner sealing strip. The bottom wall of the connecting cylinder is provided with a receiving groove for accommodating the inner sealing strip. The top wall of the outer sealing strip and the bottom wall of the inner sealing strip are fixedly connected. The inner peripheral wall of the outer sealing strip is in contact with the peripheral wall of the transducer.

[0013] Furthermore, an oxygen-dehumidifying layer is provided between the transducer and the connecting cylinder.

[0014] In summary, this application includes at least one of the following beneficial technical effects:

[0015] The first link and the second link cooperate through the first inclined plane and the second inclined plane, which converts the axial movement of the first link into the radial sliding of the second link, thereby locking the radial position of the transducer. No additional tools are required for installation and disassembly, which is simple and convenient. The cooperation between the dovetail block and the dovetail groove along the extension direction of the inclined plane restricts the sliding between the first link and the second link, which helps to prevent the contact point of the first link and the second link from shifting due to force, improves structural stability, and helps to ensure the reliability of the limiting function under long-term vibration environment.

[0016] The inner sealing strip is embedded in the receiving groove on the bottom wall of the connecting cylinder, and the outer sealing strip fits against the peripheral wall of the transducer. This helps to prevent seawater from seeping in from the bottom opening of the connecting cylinder, improves sealing reliability, meets the waterproof requirements for long-term underwater operation, and facilitates replacement.

[0017] The deoxygenation and dehumidification layer between the transducer and the connecting cylinder continuously absorbs water vapor and oxygen from the cavity, inhibiting the oxidation and corrosion of metal parts and the failure of circuit components due to moisture. It is especially suitable for ship environments with high humidity and high salt spray, which helps to ensure the long-term stable operation of the equipment and reduce the frequency of failures caused by environmental factors. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of a replaceable Doppler log in an embodiment of this application.

[0019] Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure of the middle AA surface.

[0020] Figure 3 This is a schematic diagram illustrating the overall structure of the limiting component in the embodiments of this application.

[0021] Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0022] Explanation of reference numerals in the attached drawings: 1. Connecting cylinder; 2. Transducer; 3. Limiting assembly; 31. First connecting rod; 32. Second connecting rod; 4. Sealing component; 41. Outer sealing strip; 42. Inner sealing strip; 5. Sliding component; 51. Slide rail; 52. Slider; 6. Tension spring; 9. Receiving groove; 10. Ring block; 11. Deoxygenation and dehumidification layer; 12. First inclined surface; 13. Second inclined surface; 14. Dovetail block; 15. Dovetail groove; 16. Slot; 17. Crossbar; 18. First groove; 19. Second groove. Detailed Implementation

[0023] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0024] This application discloses a Doppler log that is easy to replace.

[0025] Reference Figure 1 and Figure 2A replaceable Doppler log includes a connecting cylinder 1 for connection with the hull and a transducer 2. The transducer 2 has a shoulder. The top of the connecting cylinder 1 is closed. The top of the transducer 2 is inserted into the connecting cylinder 1 through the bottom opening. The shoulder of the transducer 2 is positioned opposite to the bottom of the connecting cylinder 1. Several sets of limiting components 3 for radially limiting the transducer 2 are provided inside the connecting cylinder 1. In this embodiment, two sets of limiting components 3 are provided, evenly arranged along the circumference of the transducer 2. A sealing member 4 for sealing the gap between the connecting cylinder 1 and the transducer 2 is provided between the connecting cylinder 1 and the transducer 2.

[0026] The sealing component 4 includes an outer sealing strip 41 and an inner sealing strip 42. A receiving groove 9 for accommodating the inner sealing strip 42 is provided on the bottom wall of the connecting cylinder 1. The top wall of the outer sealing strip 41 and the bottom wall of the inner sealing strip 42 are fixedly connected. The inner peripheral wall of the outer sealing strip 41 is in contact with the peripheral wall of the transducer 2. In this embodiment, both the outer sealing strip 41 and the inner sealing strip 42 are made of flexible material, which is beneficial to prevent seawater from seeping in from the bottom opening of the connecting cylinder 1, improves the sealing reliability, and meets the waterproof requirements for long-term underwater operation. When the transducer 2 needs to be replaced, the outer sealing strip 41 and the inner sealing strip 42 are pulled apart to facilitate subsequent replacement work and reduce the attachment of marine organisms between the connecting cylinder 1 and the transducer 2, making replacement easier.

[0027] A ring block 10 is circumferentially arranged on the shoulder of the transducer 2, corresponding to the inner wall of the connecting cylinder 1. This allows the inner sealing strip 42 to be clamped between the connecting cylinder 1 and the ring block 10, improving the installation stability of the inner sealing strip 42. An oxygen-dehumidifying layer 11 is provided between the transducer 2 and the connecting cylinder 1. The oxygen-dehumidifying layer 11 continuously absorbs water vapor and oxygen from the cavity, inhibiting oxidation and corrosion of metal parts and failure of circuit components due to moisture. It is especially suitable for high humidity and high salt spray marine environments, which helps ensure long-term stable operation of the equipment and reduces the frequency of failures caused by environmental factors.

[0028] Reference Figure 2 and Figure 4 The limiting component 3 includes a first connecting rod 31 and a second connecting rod 32. The first connecting rod 31 moves along the axis parallel to the connecting cylinder 1, and the second connecting rod 32 slides along the axis perpendicular to the connecting cylinder 1 via a sliding member 5. The sliding member 5 includes a slide rail 51 and a slider 52. One end of the slide rail 51 is fixedly connected to the inner wall of the connecting cylinder 1, and the extension direction of the slide rail 51 is perpendicular to the axis of the connecting cylinder 1. The second connecting rod 32 slides along the extension direction of the slide rail 51. In this embodiment, two sets of sliding members 5 are provided, symmetrically arranged on both sides of the second connecting rod 32.

[0029] The first connecting rod 31 has a first inclined surface 12 at its bottom, and the second connecting rod 32 has a second inclined surface 13 at its end near the first connecting rod 31. The first inclined surface 12 and the second inclined surface 13 are in contact with each other. The distance from the first inclined surface 12 to the top of the connecting cylinder 1 increases from the end away from the axis of the connecting cylinder 1 to the end near the axis of the connecting cylinder 1. A dovetail block 14 is provided on the first inclined surface 12. The extension direction of the dovetail block 14 is parallel to the extension direction of the inclined surface. A limit block is provided at the end of the dovetail block 14 away from the second connecting rod 32. A dovetail groove 15 is provided on the second inclined surface 13 to accommodate the dovetail block 14. A sealing block is provided at the end of the dovetail groove 15 away from the first connecting rod 31. A slot 16 for the second connecting rod 32 to be inserted is provided on the peripheral wall of the transducer 2. The slot 16 is arc-shaped, and the axis of the slot 16 is collinear with the axis of the connecting cylinder 1.

[0030] The top of the first connecting rod 31 is provided with a crossbar 17, and the top of the transducer 2 is provided with a first groove 18 and a second groove 19. The first groove 18 and the second groove 19 are connected. The second groove 19 is set in an arc shape. The axis of the second groove 19 is collinear with the axis of the connecting cylinder 1. The extension direction of the second groove 19 is the same as the extension direction of the slot 16.

[0031] During installation, the transducer 2 is inserted into the connecting cylinder 1, and the crossbar 17 is inserted into the first groove 18. The transducer 2 is then rotated so that the crossbar 17 is inserted into the second groove 19. As the transducer 2 continues to be inserted further inward, it drives the crossbar 17, which in turn drives the first connecting rod 31 to move closer to the inner top wall of the connecting cylinder 1, while the second connecting rod 32 moves away from the transducer 2. Then, the transducer 2 is pulled away from the inner top wall of the connecting cylinder 1, causing it to drive the crossbar 17, which in turn drives the first connecting rod 31. 31 drives the second link 32, causing the end of the second link 32 away from the first link 31 to be inserted into the slot 16, thereby locking the radial position of the transducer 2. No additional tools are needed for installation and disassembly, which is simple and convenient. The cooperation between the dovetail block 14 and the dovetail groove 15 along the inclined plane restricts the sliding between the first link 31 and the second link 32, which helps to prevent the contact point of the first link 31 and the second link 32 from shifting due to force, improves structural stability, and helps to ensure the reliability of the limiting function under long-term vibration environment.

[0032] Reference Figure 3 and Figure 4 A tension spring 6 is provided between the crossbar 17 and the inner top wall of the connecting cylinder 1, so that when the transducer 2 is not installed, the first connecting rod 31 is close to the inner top wall of the connecting cylinder 1, and the second connecting rod 32 moves towards the inner peripheral wall of the connecting cylinder 1 under the drive of the first connecting rod 31, so as to avoid interference between the second connecting rod 32 and the end of the transducer 2.

[0033] The implementation principle of a replaceable Doppler log in this application embodiment is as follows: When replacing the transducer 2, firstly, remove the outer sealing strip 41 and inner sealing strip 42, which are attached with marine organisms. Then, rotate the transducer 2 so that the crossbar 17 rotates out of the second groove 19 and aligns with the first groove 18. At this time, the tension spring 6 drives the crossbar 17 and the first connecting rod 31 to move towards the inner top wall of the connecting cylinder 1. The first connecting rod 31 drives the second connecting rod 32 to move away from the transducer 2. The second connecting rod 32 disengages from the slot 16, and the transducer 2 can be removed from the connecting cylinder 1. During installation, insert the transducer 2 into the connecting cylinder 1, insert the crossbar 17 into the first groove 18, and then rotate the transducer 2 so that the crossbar 17 inserts into the second groove 19. When the transducer 2... As the transducer 2 continues to be inserted, it drives the crossbar 17, which in turn drives the first connecting rod 31 to move closer to the inner top wall of the connecting cylinder 1, while the second connecting rod 32 moves away from the transducer 2. Then, the transducer 2 is pulled away from the inner top wall of the connecting cylinder 1, which drives the crossbar 17, which in turn drives the first connecting rod 31, which in turn drives the second connecting rod 32. This causes the end of the second connecting rod 32 that is away from the first connecting rod 31 to be inserted into the slot 16, thus locking the radial position of the transducer 2. No additional tools are needed for installation and disassembly, making it simple and convenient.

[0034] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A Doppler log which facilitates replacement, characterized by: It includes a connecting cylinder (1) for connecting to the hull and a transducer (2). The top of the connecting cylinder (1) is closed. The top of the transducer (2) is inserted into the connecting cylinder (1) through the bottom opening of the connecting cylinder (1). The connecting cylinder (1) is provided with a plurality of limiting components (3) for radially limiting the transducer (2). A sealing member (4) for sealing the gap between the connecting cylinder (1) and the transducer (2) is provided between the connecting cylinder (1) and the transducer (2).

2. A Doppler log with easy exchange according to claim 1, characterized in that: The limiting component (3) includes a first connecting rod (31) and a second connecting rod (32). The first connecting rod (31) moves along an axis parallel to the connecting cylinder (1), and the second connecting rod (32) slides along an axis perpendicular to the connecting cylinder (1) via a sliding member (5). A first inclined surface (12) is provided at the bottom of the first connecting rod (31), and a second inclined surface (13) is provided at the end of the second connecting rod (32) near the end of the first connecting rod (31). The first inclined surface (12) and the second inclined surface (13) are in contact with each other. The first inclined surface (12) extends to the connecting cylinder (1). The distance at the top increases from the end away from the axis of the connecting cylinder (1) to the end closer to the axis of the connecting cylinder (1). A dovetail block (14) is provided on the first inclined surface (12). The extension direction of the dovetail block (14) is parallel to the extension direction of the inclined surface. A dovetail groove (15) for accommodating the dovetail block (14) is provided on the second inclined surface (13). A slot (16) for inserting the second connecting rod (32) is provided on the peripheral wall of the transducer (2). The slot (16) is arc-shaped. The axis of the slot (16) is collinear with the axis of the connecting cylinder (1).

3. A Doppler log with easy exchange of the transducer according to claim 2, characterized in that: The first connecting rod (31) is provided with a crossbar (17) at the top. The transducer (2) is provided with a first groove (18) and a second groove (19) at the top. The first groove (18) and the second groove (19) are connected. The second groove (19) is set to be arc-shaped. The axis of the second groove (19) is collinear with the axis of the connecting cylinder (1). The extension direction of the second groove (19) is the same as the extension direction of the slot (16).

4. A Doppler log with easy exchange of the transducer according to claim 3, characterized in that: A tension spring (6) is provided between the crossbar (17) and the inner top wall of the connecting cylinder (1).

5. A Doppler log with easy exchange according to claim 2, characterized in that: The sliding component (5) includes a slide rail (51) and a slider (52). One end of the slide rail (51) is fixedly connected to the inner wall of the connecting cylinder (1). The extension direction of the slide rail (51) is perpendicular to the axial direction of the connecting cylinder (1).

6. A Doppler log with easy exchange according to claim 1, characterized in that: The sealing component (4) includes an outer sealing strip (41) and an inner sealing strip (42). The bottom wall of the connecting cylinder (1) is provided with a receiving groove (9) for accommodating the inner sealing strip (42). The top wall of the outer sealing strip (41) and the bottom wall of the inner sealing strip (42) are fixedly connected. The inner peripheral wall of the outer sealing strip (41) is in contact with the peripheral wall of the transducer (2).

7. A Doppler log with easy exchange according to claim 1, characterized in that: An oxygen and moisture removing layer (11) is arranged between the transducer (2) and the connecting cylinder (1).

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