Underwater towed body for shallow water towing and towing method

Abstract

The invention discloses an underwater towed body for shallow water towing and a towing method. The underwater towed body comprises a main towed body, a shallow towing floating body, a towing frame, a towing plate, a lower tail wing plate, a horizontal wing plate, a rudder plate, an upper tail wing plate and a towing cable. The two sides of the main towed body are each provided with a shallow towed floating body, the main towed body is provided with a towed frame, and the towed plate is vertically installed on the towed frame. The towing plate is connected with the towing cable; two upper tail wing plates, two horizontal wing plates and two lower tail wing plates are arranged at the tail part of the main towed body and are symmetrically arranged about the axis of the main towed body; the rudder plate is embedded into the upper surface of the horizontal wing plate through the rotating shaft and is flush with the horizontal wing plate. The attitude stability of the towed body in the shallow towing process can be guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of underwater towing, and in particular to an underwater towing body and a towing method for shallow water towing. Background Art

[0002] Towing stability design is an important part of towing body design, which directly affects the working state and detection capability of the detection instruments and equipment carried by the towing body. The current design means and manufacturing methods are difficult to meet the increasingly stringent requirements of detection instruments and equipment for the shallow water towing stability of the towing body. Especially in the field of shallow water towing, the cable release length is short, and the attitude of the towing body, especially the pitch attitude and fixed depth, are more affected by the heave and wake of the towing mother ship. The main methods commonly used to improve the stability of the towing body are: (1) lowering the center of gravity of the towing body, raising the center of buoyancy, and increasing the net weight in the water; (2) designing the shape of the towing body to be streamlined; (3) installing adjustment wings to balance the attitude; (4) adding a tail damping module.

[0003] However, the above method is mainly proposed for deep-water towing mode. Compared with deep-water towing, shallow-water towing has a shorter towing line, which makes the wake of the towing mother ship cause greater interference to the towed body, which is an important factor affecting the stability of the towed body. Summary of the invention

[0004] In view of this, the present invention provides an underwater towing body and a towing method for shallow water towing, which can ensure the posture stability of the towing body during shallow water towing.

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

[0006] An underwater towing body for shallow water towing, comprising a main towing body, a shallow towing float, a towing frame, a towing board, a lower tail wing board, a horizontal wing board, a rudder board, an upper tail wing board and a towing trolley;

[0007] A shallow towing buoy is installed on each side of the main towing body, and a towing frame is provided on the main towing body, and the towing board is vertically installed on the towing frame; the towing board is connected to the towing cable; the tail of the main towing body is provided with an upper tail wing plate, a horizontal wing plate, and a lower tail wing plate, and there are two of each of the upper tail wing plate, the horizontal wing plate, and the lower tail wing plate, which are symmetrically arranged about the axis of the main towing body; the rudder plate is embedded in the upper surface of the horizontal wing plate through a rotating shaft, and the surfaces of the two are flush.

[0008] Furthermore, the shallow towing float is provided with a plurality of compartments, and the buoyancy is adjusted by filling the compartments with different numbers and positions with water.

[0009] Furthermore, the tow cable is a zero-buoyancy tow cable.

[0010] Furthermore, the towing frame and the towing plate are both provided with a plurality of mounting holes.

[0011] The present invention also provides a method for towing an underwater towing body in shallow water, which adopts the underwater towing body mentioned above, and allows water to enter the shallow towing floating body compartments of different numbers and positions to adjust the buoyancy; buoyancy blocks are installed in the middle and tail of the main towing body, and the gravity blocks are removed at the same time to ensure that the static moment of the main towing body relative to the towing point is consistent before and after adjustment; the horizontal wing plate is adjusted to an upward attack angle to reduce the fixed depth of the towing body, and the attack angle of the rudder plate is adjusted to increase the towing resistance.

[0012] Furthermore, a zero-buoyancy towline is used for towing.

[0013] Beneficial effects:

[0014] 1. The present invention installs a shallow towing body on both sides of the main towing body to ensure that the towing body maintains a sufficient rearward extension distance when towing. After installation, the weight of the towing body in water can be adjusted within the range of 25-450kg, and the fixed depth range of the towing body is 5-100m. The balance posture and pitch angle of the towing body are adjusted, the influence of the wake of the towing mother ship on the posture of the towing body is reduced, and the towing stability of the towing body is improved, which is of great significance to the towing mine detection work in shallow water and shallow spreading areas.

[0015] 2. The shallow towing buoy of the present invention is provided with a plurality of compartments. According to different water depths, the shallow towing buoy can allow water to enter several compartments to have different adjustable buoyancy, so that the towing body can maintain a sufficient rearward extension distance within each shallow towing depth range.

[0016] 3. The present invention reduces the depth-fixing force by adjusting the horizontal wing plate, generates upward lift by adjusting the horizontal wing plate to an upward attack angle, reduces the fixed depth of the towing body, and adjusts the rudder plate attack angle to increase the towing resistance, thereby ensuring the attitude stability of the towing body during shallow towing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the composition of the underwater towing body of the present invention.

[0018] Figure 2 This is an enlarged schematic diagram of the connection between the rudder plate and the horizontal wing plate.

[0019] Among them, 1-main towing body, 2-shallow towing buoy, 3-towing frame, 4-towing board, 5-hanging point, 6-lower tail plate, 7-horizontal wing plate, 8-rudder plate, 9-upper tail plate. DETAILED DESCRIPTION

[0020] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0021] The present invention provides an underwater towing body for shallow water towing, such as Figure 1 As shown, it includes a main towing body 1, a shallow towing buoy 2, a towing frame 3, a towing board 4, a lower tail wing board 6, a horizontal wing board 7, a rudder board 8, an upper tail wing board 9 and a towing handle.

[0022] A shallow towing buoy 2 is installed on each side of the main towing body 1, a towing frame 3 is provided at the front of the main towing body 1, and a towing board 4 is vertically installed on the towing frame 3; the towing board 4 is connected to the towing cable; a hanging point 5 is fixed at the rear of the main towing body 1; an upper tail wing plate 9, a horizontal wing plate 7, and a lower tail wing plate 6 are provided at the tail of the main towing body 1, and the upper tail wing plate 9, the horizontal wing plate 7, and the lower tail wing plate 6 are all two, and are symmetrically arranged about the axis of the main towing body 1; Figure 2 As shown, the rudder plate 8 is embedded in the upper surface of the horizontal wing plate 7 through a rotating shaft and the surfaces of the two are flush.

[0023] Specifically, the shallow towing buoy 2 is provided with a plurality of compartments, and the buoyancy is adjusted by filling the compartments with water in different numbers and positions. The existing steel wire armored cable is replaced with a zero buoyancy towing cable of about 100 meters for towing. The towing cable is wound on a cable drum, and the reeling length of the towing cable is adjusted according to the working conditions during use.

[0024] A plurality of mounting holes are provided on the towing frame 3 and the towing plate 4. By connecting different mounting holes, the mounting position of the towing plate 4 and the connection position of the towing cable can be changed.

[0025] The present invention also provides a method for towing an underwater towing body in shallow water, using the above-mentioned underwater towing body, the method is as follows:

[0026] The shallow towing float 2 is fixed to both sides of the main towing body 1 through a mounting frame. According to different water depths, the shallow towing float 2 can allow several compartments to be filled with water, with different adjustable buoyancy, so that the main towing body 1 can maintain a sufficient rearward extension distance within each shallow towing depth range.

[0027] Buoyancy blocks are installed at the middle and tail of the main towing body 1, and the gravity blocks are removed at the same time to reduce the weight of the main towing body 1 in water. After the buoyancy blocks are installed, the weight arrangement is adjusted to ensure that the static moment of the main towing body 1 relative to the towing point is consistent before and after the adjustment.

[0028] The horizontal wing plate 7 is adjusted to an upward attack angle to generate an upward lift force and reduce the fixed depth of the towed body.

[0029] The attack angle of the rudder plate 8 is adjusted to increase the drag resistance. The control module in the main drag body 1 controls the movement of the rotating shaft to drive the rudder plate 8 to rotate. The rudder plate 8 is raised or lowered according to the real-time posture of the main drag body 1 to increase the drag.

[0030] Use a zero-buoyancy towline for towing, and replace the steel wire armored cable with a zero-buoyancy towline about 100 meters long for towing.

[0031] In summary, the above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An underwater towing body for shallow water towing, characterized in that: It includes the main towing body, shallow towing buoy, towing frame, towing board, lower tail wing board, horizontal wing board, rudder board, upper tail wing board and towing trolley; A shallow towing buoy is installed on each side of the main towing body, and a towing frame is provided on the main towing body, and the towing board is vertically installed on the towing frame; the towing board is connected to the towing cable; the tail of the main towing body is provided with an upper tail wing plate, a horizontal wing plate, and a lower tail wing plate, and there are two of the upper tail wing plate, the horizontal wing plate, and the lower tail wing plate, which are symmetrically arranged about the axis of the main towing body; the rudder plate is embedded in the upper surface of the horizontal wing plate through a rotating shaft, and the surfaces of the two are flush.

2. The underwater towing body for shallow water towing according to claim 1, characterized in that: The shallow towing buoy is provided with a plurality of compartments, and the buoyancy is adjusted by filling the compartments with different numbers and positions with water.

3. The underwater towing body for shallow water towing according to claim 1, characterized in that: The towline is a zero-buoyancy towline.

4. The underwater towing body for shallow water towing according to any one of claims 1 to 3, characterized in that: The towing frame and the towing plate are both provided with a plurality of mounting holes.

5. A method for towing an underwater towed body in shallow water, characterized in that: The underwater towing body as claimed in claim 2 is adopted to adjust the buoyancy by filling water into the shallow towing floating body compartments of different numbers and positions; buoyancy blocks are installed in the middle and tail of the main towing body, and the gravity blocks are removed at the same time to ensure that the static moment of the main towing body relative to the towing point is consistent before and after adjustment; the horizontal wing plate is adjusted to an upward attack angle to reduce the fixed depth of the towing body, and the attack angle of the rudder plate is adjusted to increase the towing resistance.

6. The method for shallow water towing of an underwater towing body according to claim 5, characterized in that: Towing is done using a zero-buoyancy towline.

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