Seabed monitoring and monitoring equipment cleaning net

Abstract

The invention discloses a cleaning net for seabed monitoring and monitoring equipment, belongs to a single-ship winged single-bag trawl, and is suitable for a trawl ship with 600-1400 horsepower. The total length of the netting gear is 35-40 meters, the length of the bag net is 4 meters, the bag net is of a two-piece type structure, the maximum mesh of the belly net is 15 centimeters, and the belly net is made of terylene or nylon netting twines. The maximum mesh of the back net is 45 cm, and net wires made of polyethylene materials are adopted. The floating-sinking ratio of the net is about 3: 4, the brake bottom number is 3 meters, and a barrier sweeping iron chain is arranged at the position 1 meter away from the front end of the lower line. The netting gear can efficiently remove monitoring and monitoring equipment on the seabed, and meanwhile has good bottom attaching performance, wear resistance and environmental protection performance.

Description

Technical Field

[0001] This invention relates to a net used for removing seabed monitoring and listening equipment, particularly a single-vessel winged single-bag trawl net. Background Technology

[0002] With the development of modern military technology, hostile forces may deploy monitoring and listening devices on the seabed, posing a threat to military facilities and maritime security. Traditional removal methods are inefficient, risky, and difficult to completely remove these devices. Therefore, there is a need for an efficient, safe, and reliable removal net. Summary of the Invention

[0003] The purpose of this invention is to provide a seabed monitoring and listening device removal net that can efficiently remove seabed monitoring and listening devices, while also possessing good bottom adhesion, wear resistance, and environmental friendliness.

[0004] The technical solution of the present invention is: a seabed monitoring and listening equipment removal net, wherein the net body is a single-vessel winged single-bag trawl net, suitable for 600-1400 horsepower trawlers;

[0005] The net is 35-40 meters long in total.

[0006] The netting has a two-piece structure. The maximum mesh size of the inner netting is 15±1 cm, and it is made of polyester or nylon wire. The maximum mesh size of the outer netting is 45±1 cm, and it is made of polyethylene wire.

[0007] Furthermore, the buoyancy ratio of the net is approximately 3:4, and the bottom depth is 3 ± 0.1 meters.

[0008] Furthermore, a sweeping chain is installed 1 ± 0.1 meters from the front end of the lower section of the net.

[0009] Furthermore, the obstacle-sweeping chain has two sections; the first obstacle-sweeping chain is 75% of the lower length, approximately 47.12m, and has a φ8mm crossbar; the second obstacle-sweeping chain is 85% of the lower length, approximately 52.7m, and has a φ10mm crossbar.

[0010] Furthermore, the net is dragged along the bottom. When the trawler drags it at a speed of 3 knots, the vertical height of the net opening is 2±0.1 meters, and the horizontal extension is 15-20 meters.

[0011] Furthermore, the net has a length of 4±1 meters for the inner net, 28±1 meters for the body net, and 7±1 meters for the sleeve net.

[0012] Furthermore, the float of the net is a PE braided rope, φ20mm, with a length of 56m; the sinker is a 6×24 steel wire rope, φ20mm, with a length of 62m.

[0013] The beneficial effects of this invention are: it provides a seabed monitoring and listening device removal net that can efficiently remove seabed monitoring and listening devices, while also having good bottom adhesion, wear resistance and environmental friendliness.

[0014] 1. Highly efficient removal: Nets can effectively remove monitoring and listening devices on the seabed, improving removal efficiency.

[0015] 2. Excellent bottom-feeding performance: Through reasonable buoyancy ratio and bottom-feeding design, the net is ensured to be stably dragged on the seabed, improving the cleaning effect.

[0016] 3. Environmental friendliness: The large mesh design of the back net can release non-target fishing objects, reducing the impact on the marine ecological environment.

[0017] 4. Wear resistance and service life: High-strength, wear-resistant materials are used to improve the service life of the nets. Attached Figure Description

[0018] Figure 1 A diagram illustrating the removal of nets used for seabed monitoring and listening equipment. Detailed Implementation

[0019] The present invention will now be further described with reference to the accompanying drawings.

[0020] The present invention is as follows Figure 1 The seabed monitoring and listening equipment removal net shown is a single-vessel winged single-bag trawl, suitable for 600-1400 horsepower trawlers. Its main technical features are as follows:

[0021] 1. Net structure:

[0022] The net is 35-40 meters long in total, of which the bag net is 4 meters long.

[0023] The netting has a two-piece structure. The maximum mesh size of the inner net is 15 cm, and it is made of polyester or nylon wire. The maximum mesh size of the outer net is 45 cm, and it is made of polyethylene wire.

[0024] The buoyancy ratio is approximately 3:4, and the bottom length is 3 meters (meaning the lower line is 3 meters longer than the upper line).

[0025] A sweeping chain is installed 1 meter from the front end of the lower section.

[0026] 2. Operational performance:

[0027] When the trawler drags the net close to the bottom at a speed of 3 knots, the vertical height of the net opening is 2 meters and the horizontal extension is 15-20 meters.

[0028] The net has a 4-meter-long inner net, a 28-meter-long body net, and a 7-meter-long sleeve net.

[0029] 3. Material selection:

[0030] The inner mesh is made of nylon material, with a maximum mesh size of 15 cm.

[0031] The back net is made of polyethylene material, with a maximum mesh size of 45 cm.

[0032] 4. Design Purpose:

[0033] Using different materials for the back and sides of the net serves three purposes: first, it increases the sinking speed and bottom adhesion of the net; second, it releases non-target fishing objects such as fish; and third, it increases wear resistance and extends the service life of the net.

[0034] The specific implementation process is as follows:

[0035] I. Net Assembly

[0036] 1. Connect the inner and outer meshes according to the design requirements to form a two-piece structure.

[0037] 2. Install a sweeping chain 1 meter from the front end of the lower line to remove obstacles on the seabed. Specifically, install two sweeping chains at the front end of the cuff. The specifications are as follows: the first chain is 75% of the lower line length, approximately 47.12m, and is an 8mm thick chain; the second chain is 85% of the lower line length, approximately 52.7m, and is a 10mm thick chain.

[0038] 3. Adjust the buoyancy and sinking device and the length of the bottom line of the net according to the requirements of a buoyancy ratio of 3:4 and a bottom depth of 3 meters. Float line: PE braided rope, φ20mm, length 56m; Sinking line: 6×24 steel wire rope, φ20mm, length 62m.

[0039] 4. Connect the pouch net, body net, and sleeve net according to the designed length to form a complete net.

[0040] II. Work Process

[0041] 1. After the trawler arrives at the designated sea area, it will deploy the nets to the seabed.

[0042] 2. Adjust the speed of the trawler to 3 knots to ensure that the net is towed stably on the seabed.

[0043] 3. After dragging the net a certain distance, retrieve the net and clean up the monitoring and listening equipment inside the net.

[0044] III. Functional Effects

[0045] 1. Highly efficient removal: Nets can effectively remove monitoring and listening devices on the seabed, improving removal efficiency.

[0046] 2. Excellent bottom-feeding performance: Through reasonable buoyancy ratio and bottom-feeding design, the net is ensured to be stably dragged on the seabed, improving the cleaning effect.

[0047] 3. Environmental friendliness: The large mesh design of the back net can release non-target fishing objects, reducing the impact on the marine ecological environment.

[0048] 4. Wear resistance and service life: High-strength, wear-resistant materials are used to improve the service life of the nets.

[0049] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A method for clearing underwater monitoring and listening equipment nets, characterized in that: The net body of the removal net is a single-vessel winged single-bag trawl net, suitable for 600-1400 horsepower trawlers; The net is 35-40 meters long in total. The netting has a two-piece structure. The maximum mesh size of the inner netting is 15±1 cm, and it is made of polyester or nylon wire. The maximum mesh size of the outer netting is 45±1 cm, and it is made of polyethylene wire.

2. The method for clearing a seabed monitoring and listening device net according to claim 1, characterized in that: The net has a buoyancy ratio of approximately 3:4 and a bottom depth of 3 ± 0.1 meters.

3. The method for clearing a seabed monitoring and listening device net according to claim 1, characterized in that: A sweeping chain is installed 1 ± 0.1 meters from the front end of the lower section of the net.

4. The method for clearing a seabed monitoring and listening device net according to claim 3, characterized in that: The obstacle-sweeping chain has two sections; the first obstacle-sweeping chain has a length of 75% of the bottom bar and a diameter of 8mm; the second obstacle-sweeping chain has a length of 85% of the bottom bar and a diameter of 10mm.

5. The method for clearing a seabed monitoring and listening device net according to claim 1, characterized in that: The net is towed close to the bottom. When the trawler tows it at a speed of 3 knots, the vertical height of the net opening is 2±0.1 meters, and the horizontal extension is 15-20 meters.

6. The method for clearing a seabed monitoring and listening device net according to claim 1, characterized in that: The net has a length of 4±1 meters for the inner net, 28±1 meters for the body net, and 7±1 meters for the sleeve net.

7. A method for clearing a seabed monitoring and listening device net according to claim 1, characterized in that: The float of the net is made of PE braided rope, φ20mm, and 56m in length; the sinker is made of 6×24 steel wire rope, φ20mm, and 62m in length.

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