Shellfish warning device for drag rake type shellfish fishing boat, application and shellfish fishing method

Abstract

The invention relates to the technical field of shallow sea shellfish fishing, in particular to a shellfish warning device for a drag rake type shellfish fishing boat, application and a shellfish fishing method.The device comprises a rolling frame and a traction frame, the rolling frame comprises a mounting frame, a vibration rod, a traction hole and a supporting rod, the traction frame comprises a traction handle and a rotating shaft, the traction handle is in an arc shape, and the rotating shaft is connected with the vibration rod. The rotating shafts are fixed to the two ends of the traction handle in the opposite directions, the installation frame is a closed circular ring or a closed regular polygon, the regular polygon is not less than five edges, the number of the vibration rods is not less than two, and the vibration rods are evenly connected to the outer side of the installation frame at intervals. The traction hole is formed in the center of the mounting frame through the supporting rod, the rotating shaft is rotationally connected in the traction hole in a sleeved mode, and the vibration rod is parallel to the connecting line of the rotating shaft. By using a rolling frame composed of a vibration rod and a mounting frame, the double shells of the shellfish are closed in advance in the vibration process.

Description

Technical Field

[0001] The invention relates to the technical field of shallow sea shellfish fishing, and in particular to a shellfish warning device for a drag-rake shellfish fishing boat, its application and a shellfish fishing method. Background Art

[0002] my country's coastal tidal flats and ocean areas are very large, with a wide variety of artificially cultivated and naturally grown shellfish. At present, shellfish harvesting mainly adopts manual collection and fishing, and there are also fishing boats trawling and artificial diving fishing operations. The traditional capture and collection methods of shellfish are greatly affected by the tide. Artificial collection of shellfish on the tidal flats can only be carried out at low tide, which is labor-intensive, low in production efficiency and poor working conditions. Artificial diving fishing relies on carrying oxygen cylinders to dive, and the time for underwater operation is limited. It is not suitable for deep diving, and shellfish in deep sea areas cannot be collected. And with the improvement of people's quality of life, people's demand for aquatic products is also increasing, especially aquatic products such as snails and shellfish. Simply catching wild aquatic products can no longer meet people's needs. Aquaculture has grown rapidly since the 1970s. People carry out aquaculture in offshore areas and inland lakes, and collect them when the aquatic products are mature. When the breeding area is large, the efficiency of fishing only by manpower is extremely low, and the labor cost expenditure is high.

[0003] The existing mechanical shellfish fishing boats usually install a high-pressure water gun-type drag rake at the rear of the hull, use high-pressure water flow to impact the seabed mud and sand, and after flushing the shellfish in the mud and sand, use the drag rake integrated with the high-pressure water gun to collect the shellfish, and then use a crane to lift the collected shellfish into the cabin. During the flushing process of the high-pressure water gun, most of the shellfish on the seabed are in a state of opening their shells to eat. When flushing with high-pressure water, it is easy to flush mud and sand into the shells of the shellfish, resulting in a large amount of mud and sand in the meat of the shellfish, or breaking and injuring the soft part of the shellfish, resulting in a decrease in the quality of shellfish fishing and a reduction in the survival rate of the shellfish. Most of the shellfish caught by this fishing method contain sand in the soft part. Even if purified, it is difficult to completely remove the sand in the soft part, which seriously affects the quality of shellfish products. In particular, processing and export companies regard this as a bottleneck problem and hope to solve it as soon as possible to open up export channels.

[0004] Therefore, the problems of high sediment content and high meat damage rate in the shellfish fishing process in the prior art are urgently needed to be solved by technicians in this field. Summary of the invention

[0005] In view of the problems existing in the prior art, the purpose of the present invention is to provide a device that can reduce the sediment content in the soft body of shellfish during shellfish fishing and can increase the survival rate of shellfish and the temporary storage time of fresh shellfish.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a shellfish warning device for a drag-rake shellfish fishing boat, comprising a rolling frame and a pulling frame, the rolling frame comprising a mounting frame, a vibration rod, a pulling hole, and a support rod, the pulling frame comprising a pulling handle and a rotating shaft, the pulling handle is arc-shaped, the rotating shaft is fixed at two ends of the pulling handle in relative directions, the mounting frame is a closed circular ring or a closed regular polygon, the regular polygon has no less than 5 sides, no less than two vibration rods are arranged, the vibration rods are evenly spaced and connected to the outside of the mounting frame, the pulling hole is arranged at the center of the mounting frame through the support rod, the rotating shaft is rotatably sleeved in the pulling hole, and the vibration rod is parallel to the connecting line of the rotating shaft.

[0007] The above-mentioned shellfish warning device for a drag-rake shellfish fishing vessel, the mounting frame is a closed circular ring, two mounting frames are provided, the mounting frames are arranged at both ends of the vibration rod, 6 vibration rods are provided, the vibration rods are evenly welded on the outside of the circular ring, 6 support rods are provided, and three support rods are evenly distributed on each mounting frame.

[0008] The above-mentioned shellfish warning device for a drag-rake shellfish fishing vessel, the mounting frame includes two closed regular hexagons of the same shape, the mounting frame is arranged at both ends of the vibration rod, six vibration rods are arranged, the vibration rods are welded to the outside of the top corners of the regular hexagon, six support rods are arranged, and three support rods are evenly distributed on each mounting frame.

[0009] A drag-rake shellfish fishing boat comprises a hull, a high-pressure water gun-type drag-rake, and also comprises a shellfish warning device as described in any one of the above items, and a pulling structure for connecting the hull and the shellfish warning device.

[0010] The above-mentioned drag-rake shellfish fishing boat, the pulling structure includes a pulling rope, a winch, and an extension rod, the winch is arranged on the hull, the extension rod protrudes to the outside of the hull, one end of the pulling rope is wound around the winch, and the other end is passed around the distal end of the extension rod and fixed in the middle position of the pulling handle.

[0011] In the above-mentioned drag-and-rake shellfish fishing boat, the shellfish warning device and the pulling structure are provided in two groups on both sides of the front end of the hull.

[0012] A shellfish catching method using a drag-rake shellfish catching vessel as described in any one of the above, comprising the following steps: Step 1: Measure the depth of the sea water in the fishing area; Step 2: placing a high-pressure water gun type drag rake and a shellfish warning device according to the seawater depth, and the shellfish warning device is set in front of the drag rake's travel route; Step 3: The fishing boat moves forward, and the shellfish warning device is driven by the fishing boat, and the rolling frame rolls around the rotating axis; Step 4: During the rolling of the rolling frame, the vibration rod strikes the seabed ahead of the moving direction of the drag rake; Step 5: The rake releases a high-pressure water stream toward the seabed, which impacts the seabed to flush out and capture the shellfish.

[0013] In the above-mentioned shellfish catching method of the drag-rake shellfish catching vessel, the pulling structure adjusts the distance between the shellfish warning device and the high-pressure water gun-type drag-rake.

[0014] The beneficial effect of the shellfish warning device for a drag-rake shellfish fishing boat of the present invention is: by using a rolling frame composed of a vibration rod and a mounting frame, the vibration rod can be continuously in contact with the ground during the rolling process of the rolling frame, thereby ensuring that the vibration rod continuously hits the seabed, and through the self-protection consciousness of the shellfish, the double shell of the shellfish is closed in advance during the vibration process, thereby preventing the high-pressure water gun from flushing mud and sand into the shell, and the rotation connection with the pulling hole through the rotating shaft can ensure that under the action of the pulling rod, the rolling frame continuously rolls forward.

[0015] The beneficial effects of a tow-rake shellfish fishing boat are as follows: by providing a shellfish warning device at one end of the bow and a high-pressure water gun-type tow-rake at one end of the stern, the shellfish in the mud and sand are warned by the shellfish warning device before the tow-rake is used for fishing, ensuring that the shellfish can close their shells in time; by installing the shellfish warning device using a pulling structure, the distance between the shellfish warning device and the tow-rake can be adjusted according to the different depths of the water area, and the forward angle of the shellfish warning device can be adjusted according to the water depth to ensure that the rolling frame rolls forward.

[0016] The beneficial effect of a shellfish catching method of a drag-rake shellfish catching boat is as follows: by using a shellfish warning device to vibrate and knock the seabed in front, it is ensured that after the shellfish in the mud and sand on the seabed are vibrated, the shellfish will close their shells in time before the high-pressure water gun hits them in order to protect themselves, thereby preventing the water flow in the high-pressure water gun from directly hitting the shells and replacing mud and sand into the shells, reducing the sand content in the meat during the shellfish catching process, reducing the impact of the high-pressure water flow on the meat, and improving the survival rate of the shellfish. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the alarm shell device of the present invention; Figure 2 This is a schematic diagram of the structure of the pulling frame of the alarm shell device of the present invention; Figure 3 This is a schematic diagram of the first structure of the mounting frame of the alarm shell device of the present invention; Figure 4 This is a second structural schematic diagram of the mounting frame of the alarm shell device of the present invention; Figure 5 It is a schematic diagram of the structure of a fishing boat of the present invention.

[0018] Explanation of the reference numerals: rolling frame 10, pulling frame 20, mounting frame 101, vibration rod 102, pulling hole 103, support rod 104, pulling handle 201, rotating shaft 202, hull 30, lifting device 40, high-pressure water gun type drag rake 50, pulling structure 60, pulling rope 601, winch 602, extension rod 603. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the technical solution and purpose of the present invention, the technical solution of the present invention is described below in conjunction with specific implementation methods and drawings.

[0020] Example 1 This embodiment mainly describes the structure of the shellfish warning device, which utilizes the vibration caused by its own rolling on the seabed and the self-protection awareness of shellfish to close their shells when frightened, thereby prompting shellfish to close their shells in advance, and utilizes the outward radiating vibration effect of the shellfish warning device to increase the range of action of the shellfish warning device.

[0021] like Figure 1-3 As shown, a shellfish warning device for a drag-rake shellfish fishing vessel includes a rolling frame 10 and a pulling frame 20. The pulling frame pulls the rolling frame to roll on the seabed under the action of an external force. The rolling frame can use a solid rolling structure with a protrusion set on the periphery. In order to save materials and facilitate use and maintenance, the rolling frame and the pulling frame are both welded with steel bars to ensure their own weight.

[0022] The rolling frame includes a mounting frame 101, a vibration rod 102, a pulling hole 103, and a support rod 104. In the present embodiment, the mounting frame adopts a circular ring structure. Specifically, the mounting frame uses 12-20 threaded steel, specifically, it is welded with 12 threaded steel. Two circular ring-shaped mounting frames are prepared, and no less than two vibration rods are provided. The vibration rods are evenly connected to the outside of the mounting frame. Specifically, the vibration rods use 18-25 threaded steel, specifically, 20 threaded steel is cut into a straight rod shape, and six vibration rods are prepared. The six vibration rods are parallel to each other and welded to the outside of the mounting frame perpendicular to the plane where the mounting frame is located. There are 6 support rods, three of which are placed on each mounting frame. The three support rods are equidistantly welded to the inside of the mounting frame, and the support rods point to the center of the circular ring-shaped mounting frame. The pulling hole uses a bearing or a ring, and the pulling hole is concentrically arranged with the circular ring-shaped mounting frame, and the pulling hole is fixed in the mounting frame using a support rod.

[0023] The vibration rod is mainly used to hit the ground and form an obstacle on the ground to ensure the normal rolling of the rolling frame. The support rod is mainly used to connect the pulling hole.

[0024] The pulling frame includes a pulling handle 201 and a rotating shaft 202. The pulling handle is arc-shaped and is formed by bending a steel bar of No. 15-17. An installation area is set in the middle of the pulling handle. Specifically, it can be welded by two steel bars, or a ring can be used, which is mainly used to bind the pulling rope. The rotating shaft uses a steel bar segment of No. 15-17 and is fixed at both ends of the pulling handle in relative directions. It can be welded or the two ends of the pulling handle can be directly bent. The rotating shaft is rotatably sleeved in the pulling hole. The inner diameter of the pulling hole is slightly larger than the outer diameter of the rotating shaft, and the connecting line of the vibration rod and the rotating shaft is parallel.

[0025] Example 2 This embodiment also describes the alarm shell device. The similarities between this embodiment and embodiment 1 will not be repeated. The difference lies in the shape of the mounting frame.

[0026] like Figure 4 As shown, in this embodiment, the mounting frame adopts a closed polygonal shape. In order to ensure that the rolling frame can roll, a regular polygon with no less than 5 sides is adopted. In order to ensure the rolling quality, a whole hexagon or a regular octagon is generally adopted. The vibration rod is set according to the number of sides of the mounting frame, that is, 6 vibration rods are set in the hexagon and 8 vibration rods are set in the octagon. The support rod is set according to half the number of sides of the polygon to ensure that the pulling ring is evenly stressed.

[0027] Usually, two mounting frames are provided, which are respectively mounted on both ends of the vibration rod. The vibration rod is welded on the outside of the mounting frame, and the support rod is evenly welded on the inside of the mounting frame.

[0028] Example 3 This embodiment mainly describes a drag-rake shellfish fishing boat. The shellfish fishing boat recorded in this embodiment is different from the existing fishing boat in that it has the shellfish warning device recorded in the above embodiment.

[0029] Specifically, Figure 5 As shown, a drag-and-rake shellfish fishing boat includes a hull 30, on which is disposed a shellfish storage bin, a shellfish lifting device 40, and a high-pressure water gun-type drag-and-rake 50. The high-pressure water gun-type drag-and-rake is disposed at the stern of the ship, and is used to flush out shellfish on the seabed in the fishing area. The above hull settings are all prior art. The difference between this technical solution and the prior art is that a shellfish warning device for prompting shellfish in mud and sand to close their shells is also disposed on the hull, and the shellfish warning device is connected to the hull through a pulling structure 60. The shellfish warning device is disposed at the front end of the hull, and is disposed on the hull one after the other with the drag-and-rake, and conforms to the habit of hull fishing.

[0030] The pulling structure includes a pulling rope 601, a winch 602, and an extension rod 603. The winch is arranged on the hull, and the extension rod protrudes to the outside of the hull. In order to reduce the wear of the pulling rope, a fixed pulley is arranged at the front end of the extension rod. One end of the pulling rope is wound around the winch, and the other end is passed around the fixed pulley on the far end of the extension rod and then fixed in the middle position of the pulling handle.

[0031] Specifically, two groups of shellfish warning devices and pulling structures are set on both sides of the front end of the hull. The depth of the seabed at the shellfish fishing site is generally within 10 meters, and the length of the pulling rope is generally set at 20 meters. By using a winch to adjust the length of the pulling rope, the angle of the pulling rope pulling the shellfish warning device can be adjusted at any time, and the distance between the shellfish warning device and the drag rake can be adjusted to ensure the normal rolling of the shellfish warning device. In addition, through the radiation effect of the entire shellfish warning device, the shellfish within a certain range of the shellfish warning device can be affected and closed in time to prevent the high-pressure water flow of the high-pressure water gun-type drag rake behind the ship's direction of travel from injecting mud and sand into the shells.

[0032] Example 4 This embodiment mainly describes the working method of a drag-rake shellfish fishing vessel equipped with a shell alarm device.

[0033] When catching shellfish, a drag-and-rake shellfish fishing vessel equipped with a shell alarm device usually uses the following method.

[0034] Step 1: Measure the depth of the sea water in the fishing area; Step 2: placing a high-pressure water gun type drag rake and a shellfish warning device according to the seawater depth, and the shellfish warning device is set in front of the drag rake's travel route; Step 3: The fishing boat moves forward, and the shellfish warning device is driven by the fishing boat, and the rolling frame rolls around the rotating axis; Step 4: During the rolling of the rolling frame, the vibration rod strikes the seabed ahead of the moving direction of the drag rake; Step 5: The rake releases a high-pressure water stream toward the seabed, which impacts the seabed to flush out and capture the shellfish.

[0035] The methods used in this embodiment, except for the use of the alarm shell device, are all mature existing technologies, and therefore, they will not be described in detail.

[0036] The above embodiments are only for illustrating the inventive concept and features of the present invention, and their purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made based on the essence of the content of the present invention should be included in the protection scope of the present invention.

Claims

1. A shellfish warning device for a drag-rake shellfish fishing vessel, characterized in that: It includes a rolling frame and a pulling frame, the rolling frame includes a mounting frame, a vibration rod, a pulling hole, and a support rod, the pulling frame includes a pulling handle and a rotating shaft, the pulling handle is arc-shaped, the rotating shaft is fixed at two ends of the pulling handle in relative directions, the mounting frame is a closed circular ring or a closed regular polygon, the regular polygon has no less than 5 sides, no less than two vibration rods are arranged, the vibration rods are evenly connected to the outside of the mounting frame, the pulling hole is arranged at the center of the mounting frame through the support rod, the rotating shaft is rotatably sleeved in the pulling hole, and the vibration rod is parallel to the connecting line of the rotating shaft.

2. The shellfish warning device for a drag-rake shellfish fishing vessel according to claim 1, characterized in that: The mounting frame is a closed circular ring, and two mounting frames are provided. The mounting frames are arranged at both ends of the vibration rod. There are 6 vibration rods, and the vibration rods are welded on the outside of the circular ring with uniform spacing. There are 6 support rods, and three support rods are evenly distributed on each mounting frame.

3. The shellfish warning device for a drag-rake shellfish fishing vessel according to claim 1, characterized in that: The mounting frame includes two closed regular hexagons of the same shape. The mounting frame is arranged at both ends of the vibration rod. There are 6 vibration rods, which are welded to the outside of the vertex corners of the regular hexagon. There are 6 support rods, and three support rods are evenly distributed on each mounting frame.

4. A drag-rake shellfish fishing vessel, comprising a hull and a high-pressure water gun-type drag-rake, characterized in that: It also includes the shellfish warning device as described in any one of claims 1 to 3, and a pulling structure for connecting the hull and the shellfish warning device.

5. The drag-and-rake shellfish fishing vessel according to claim 4, characterized in that: The pulling structure includes a pulling rope, a winch, and an extension rod. The winch is arranged on the hull, and the extension rod protrudes outward from the hull. One end of the pulling rope is wound around the winch, and the other end is fixed at the middle position of the pulling handle after passing around the distal end of the extension rod.

6. The drag-and-rake shellfish fishing vessel according to claim 5, characterized in that: The shellfish warning device and the pulling structure are arranged in two groups on both sides of the front end of the hull.

7. A shellfish catching method using a drag-rake shellfish catching vessel as claimed in any one of claims 4 to 6, characterized in that: The following steps are involved: Step 1: Measure the depth of the sea water in the fishing area; Step 2: placing a high-pressure water gun type drag rake and a shellfish warning device according to the seawater depth, and the shellfish warning device is set in front of the drag rake's travel route; Step 3: The fishing boat moves forward, and the shellfish warning device is driven by the fishing boat, and the rolling frame rolls around the rotating axis; Step 4: During the rolling of the rolling frame, the vibration rod strikes the seabed ahead of the moving direction of the drag rake; Step 5: The rake releases a high-pressure water stream toward the seabed, which impacts the seabed to flush out and capture the shellfish.

8. The shellfish catching method of the drag-rake shellfish catching vessel according to claim 7, characterized in that: The pulling structure adjusts the distance between the warning shell device and the high-pressure water gun type drag rake.

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