Longline oyster stripping machine and operation method thereof

Abstract

The present invention relates to a longline oyster stripping machine, comprising a motor, a transmission device, a cylinder, a partition, a scraper, and a baffle; the motor drives the cylinder to rotate through the transmission device; a plurality of partitions are distributed axially on the cylinder, wherein the diameter of the middle partition is the largest, and the diameters of the partitions on both sides decrease in sequence; a plurality of scrapers are vertically fixed radially on both sides of the partition, and there is a first spacing between adjacent axial scrapers, the first spacing being greater than the diameter of the culture rope and less than the outer diameter of the oyster; the spacing between adjacent partitions is a second spacing, the second spacing being less than the outer diameter of the float; a blocking device is provided above the cylinder, and the blocking device is located within the first spacing. The present invention achieves separation of oysters from the culture rope and lossless passage of the float during continuous mechanized operation, greatly reducing manpower consumption and improving work efficiency; compared to the existing oyster shedding method of rapid impeller impact, the present invention is safe and reliable, the float automatically avoids, and the oyster damage rate is low.

Description

Technical Field

[0001] The invention relates to a longline culture oyster stripping machine and an operating method thereof, and belongs to the technical field of oyster longline culture and harvesting. Background Art

[0002] Longline raft culture is a common offshore oyster farming method. It mainly consists of a rope about 80-120m long, with both ends connected to seabed anchor piles, and several buoys connected at equal distances in the middle to enable the rope to bear weight and float. Oysters are attached to a 2-3m long farming rope. One farming rope can be attached to multiple oysters. One end of the farming rope is connected to the rope and the other end hangs freely. Several ropes are equidistantly arranged vertically under the stem rope to form an oyster farming longline raft. The raft relies on the buoyancy of the buoys evenly distributed on the rope to float horizontally 0.5-1m below the sea surface. Several longline rafts are horizontally arranged under the sea surface to form a raft farming area.

[0003] Traditionally, the oysters are removed by manually driving a boat into the raft area to cut the culture rope from the rope, and then manually lifting the oyster culture rope from the water to the cabin. After the harvest is completed, the oysters are transported to the shore and manually knocked off the culture rope, or a single culture rope is wound with a mechanical rotating device and pulled out from the gap to squeeze the oysters off. This method is labor-intensive and inefficient, and is no longer suitable for modern production models.

[0004] There are also mechanized methods for harvesting oysters from longline culture. For example, this involves using a pair of high-speed impellers with shafts parallel to the stem rope. The impellers rotate in opposite directions, and the culture rope passes between the impellers. The impellers strike the oysters at high speed, knocking them off the rope. This method causes significant damage to the oysters, resulting in high losses. Summary of the Invention

[0005] The object of the present invention is to provide a mechanized longline culture oyster removal method, which has the characteristics of safety and reliability, automatic float avoidance, and low oyster damage rate compared with the existing technology.

[0006] The present invention adopts the following technical solutions:

[0007] A longline oyster stripping machine comprises a motor 21, a transmission device 22, a cylinder 23, a partition plate 24, a scraper 25, and a baffle 28; the motor 21 drives the cylinder 23 to rotate through the transmission device 22; a plurality of partition plates 24 are distributed axially on the cylinder 23, wherein the diameter of the middle partition plate is the largest, and the diameters of the partition plates 24 on both sides decrease successively; a plurality of scrapers 25 are vertically fixed at radial intervals on both sides of the partition plates 24, and a first spacing is provided between axially adjacent scrapers 25, the first spacing being greater than the diameter of the culture rope and less than the outer diameter of the oyster; the spacing between adjacent partition plates 24 is a second spacing being less than 1 / 2 of the outer diameter of the float 7; a baffle 28 is provided above the cylinder 23, and a slot is provided on the baffle 28 for the partition plates 24 and the scraper 25 to pass through when rotating.

[0008] Preferably, it further comprises a frame 29 , the lower portion of which is fixedly connected to the baffle 28 .

[0009] Preferably, the outer diameter of the scraper 25 connected to the partition is the same as or slightly smaller than the partition 24, and the outer end is beveled, so as not to directly contact the float 7 on the stem rope 4 and facilitate the breeding rope to enter the first spacing.

[0010] Furthermore, it also includes a base 1, and the frame 29 is fixed on the base 1.

[0011] Preferably, the scraper 25 is beveled to form a certain angle with the spacer 24, which is 45-65 degrees.

[0012] An operating method of the longline oyster stripping machine described in any one of the above comprises the following steps:

[0013] S1. The rope pulling device lifts the rope and the aquaculture rope from the sea and passes them over the stripping device. The aquaculture rope and the attached oysters enter the gap between the paired rotating scrapers of the stripper.

[0014] S2. The diameter of the middle ring is the largest, and the diameters of the rings on both sides decrease in sequence, forming a slope on both sides. Multiple overlapping breeding ropes will slide into the gaps on both sides due to gravity;

[0015] S3. The majority of the oysters are separated from the culture rope by the squeezing force of the rotating scraper. A few oysters at the end of the culture rope rotate with the movement of the scraper and hit the baffle 28 and fall off.

[0016] S4. The breeding rope leaves the drum and continues to move forward along with the stem rope.

[0017] The beneficial effects of the present invention are:

[0018] 1) The oysters are separated from the culture ropes and the floats pass through the oysters without damage during the continuous mechanized operation, which greatly reduces manpower consumption and improves work efficiency. The material removal capacity is 5-7 times higher than that of traditional manual labor.

[0019] 2) Compared with the existing oyster shedding method of rapid impact by impellers, the present invention has the characteristics of safety and reliability, automatic avoidance of floats, and low oyster damage rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the main part of the longline oyster stripping machine, where (a) is the front view and (b) is the left view.

[0021] Figure 2 It is a schematic diagram of the stripping process, where (a) is the main view and (b) is the top view.

[0022] Figure 3 This is a schematic diagram of the process of the float passing through.

[0023] Figure 4 This is a schematic diagram of the process of oyster passage.

[0024] In the figure,

[0025] 21. Motor 22. Transmission 23. Cylinder 24. Spacer 25. Scraper 26. Through shaft 27. Bearing 28. Baffle 29. Frame;

[0026] 1. Machine base 2. Stripper 3. Traction wheel 4. Rope 5. Culture rope 6. Oyster 7. Float;

[0027] F1. The float contacts the middle spacer. F2. The float deflects to one side due to gravity. F3. The float avoids the center position and passes through.

[0028] M1. The scraper drives the tail end of the oyster to rotate. M2. The oyster hits the baffle. M3. The oyster falls and the culture rope loosens. DETAILED DESCRIPTION

[0029] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0030] The present invention relates to a device and operating method for removing oysters from longline culture. The device utilizes a pair of scrapers fixed to a cylindrical drum, which rotate to create a continuous nip and squeeze to remove oysters from the culture rope. Spacers of varying diameters arranged in a shuttle pattern deflect the float from the rope's path, achieving continuous removal.

[0031] See also Figure 1 The main structures of the stripper are: motor 21, transmission device 22, cylinder 23, partition plate 24, scraper 25, through shaft 26, bearing 27, baffle 28, and frame 29.

[0032] See also Figure 1 Specifically, a plurality of spacers 24 are evenly distributed on the cylindrical body 23, the diameter of the middle spacer 24 is the largest, and the diameters of the spacers 24 on both sides decrease successively, and the appearance is shuttle-shaped;

[0033] Several pairs of scrapers 25 are fixed between the two partition plates 24. The tip of each scraper 25 is at the same height as the outer edge of the partition plate 24 to which it is connected, and the bottom is connected to the cylinder 23. The oblique mouth of the scraper 25 forms a certain angle with the partition plate 24, which is 45-65 degrees. There is a certain width gap between the scrapers 25. The gap width is greater than the diameter of the culture rope and less than the average width of the oysters. The scrapers 25 are evenly distributed in a ring on the partition plate 24.

[0034] A through-shaft 26 extends through the centerline of the cylinder 23. Its ends are positioned by bearings 27 and a transmission 22, respectively. Rotational power is provided by a motor 21 (an electric motor or hydraulic motor). The transmission 22 and bearings 27 are mounted on a frame 29. A baffle 28 is mounted equidistantly on the crossbeam of the frame 29, positioned between the pair of scrapers 25. The head of the baffle 28 is in close contact with the cylinder 23.

[0035] See also Figure 2 The operation method is to use the rope traction device to lift the rope together with the culture rope from the sea and pass it over the stripping device. The culture rope and the attached oysters enter the gap between the paired rotating scrapers of the stripper, and the squeezing force of the rotating scrapers is used to separate the oysters from the culture rope.

[0036] The stripper 2 is mounted on the base 1, between two traction wheels 3. A rope 4 is lifted by a crane and placed in the V-grooves of the front and rear traction wheels 3. As the traction wheels rotate, the rope 4 moves horizontally, and the suspended aquaculture rope 5, connected to one end of the rope 4, contacts the stripper 2. When the aquaculture rope 5 enters the gap between adjacent spacers 24, the scrapers 25 on the spacers 24, under the action of rotation, collide and squeeze the oysters 6 on the aquaculture rope 5, causing them to separate and fall off. Because the diameter of the middle spacer 34 is the largest, and the diameters of the spacers 34 on either side decrease in sequence, forming a slope on both sides, multiple overlapping aquaculture ropes 5 will slide into the gaps on both sides due to gravity, ensuring that the aquaculture ropes 5 are completely stripped by the stripper 2.

[0037] When the float 7 contacts the stripper 2, the middle spacer 24 has the largest diameter and first hits the float 7, and the diameters of the spacers 24 on both sides decrease in sequence to form a slope. When the rope 4 pulls the float 7 through the stripper 2, the float 7 will be squeezed to one side to avoid the narrow passage between the rope 4 and the stripper. In addition, the edge of the scraper 25 is lower than the line connecting the outer edges of the spacers 24, so that the scraper 25 cannot contact the float 7 to avoid damaging the float 7. Figure 3 shown.

[0038] See also Figure 4When the culture rope 5 is stripped to the tail, due to the weight reduction, the gap between the pair of scrapers 25 will drive the oysters 6 at the tail to rotate around the cylinder 23. When the oysters 6 hit the baffle 28 at the rear of the stripper 2, they will fall off the culture rope 5. The culture rope 6 will sag loosely and be taken away by the rope 4. Figure 4 shown.

[0039] The operation of the longline oyster stripper includes the following steps:

[0040] S1. The rope pulling device lifts the rope and the aquaculture rope from the sea and passes them over the stripping device. The aquaculture rope and the attached oysters enter the gap between the paired rotating scrapers of the stripper.

[0041] S2. The diameter of the middle ring is the largest, and the diameters of the rings on both sides decrease in sequence, forming a slope on both sides. Multiple overlapping breeding ropes will slide into the gaps on both sides due to gravity;

[0042] S3. The majority of the oysters are separated from the culture rope by the squeezing force of the rotating scraper. A few oysters at the end of the culture rope rotate with the movement of the scraper and hit the baffle 28 and fall off.

[0043] S4. The breeding rope leaves the drum and continues to move forward along with the stem rope.

[0044] The present invention is suitable for the destocking operation of oysters cultured on longline rafts. It can separate oysters from the culture ropes and allow the floats to pass through without damage during continuous mechanized operation, greatly reducing manpower consumption and improving work efficiency. The destocking capacity is 5-7 times higher than that of traditional manual labor, providing technical support for mechanized continuous oyster harvesting operations at sea. Compared with the existing oyster shedding method of rapid impeller impact, the present invention is safe and reliable, with automatic float avoidance and a low oyster damage rate.

Claims

1. A longline oyster stripping machine, characterized by: It includes a motor (21), a transmission device (22), a cylinder (23), a partition plate (24), a scraper (25), and a baffle (28); The motor (21) drives the cylinder (23) to rotate through the transmission device (22); A plurality of partition plates (24) are distributed on the cylinder (23) at intervals along the axial direction, wherein the diameter of the partition plate in the middle is the largest, and the diameters of the partition plates (24) on both sides decrease in sequence; A plurality of scrapers (25) are vertically fixed at intervals along the radial direction on both sides of the spacer (24), and a first spacing is provided between axially adjacent scrapers (25), and the first spacing is greater than the diameter of the culture rope and smaller than the outer diameter of the oyster; The spacing between adjacent spacers (24) is a second spacing, and the second spacing is less than 1 / 2 of the outer diameter of the float (7); A blocking device is provided above the cylinder (23), and the blocking device is located within the first distance.

2. The longline oyster stripping machine according to claim 1, characterized in that: The blocking device is a plurality of baffles (28) arranged at intervals.

3. The longline oyster stripping machine according to claim 1, characterized in that: It also includes a frame (29), the lower part of which is fixedly connected to the baffle (28).

4. The longline oyster stripping machine according to claim 1, characterized in that: The outer diameter of the scraper (25) connected to the spacer is the same as or slightly smaller than that of the spacer (24), and the outer end is beveled, so as not to directly contact the float (7) on the stem rope (4) and facilitate the cultivation rope to enter the first spacing.

5. The longline oyster stripping machine according to claim 3, characterized in that: It also includes a base (1), and the frame (29) is fixed on the base (1).

6. The longline oyster stripping machine according to claim 1, characterized in that: The scraper (25) is obliquely opened to form a certain angle with the spacer (24), and the angle is 45-65 degrees.

7. An operating method of the longline oyster stripping machine according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1. The rope pulling device lifts the rope and the aquaculture rope from the sea and passes them over the stripping device. The aquaculture rope and the attached oysters enter the gap between the paired rotating scrapers of the stripper. S2. The diameter of the middle ring is the largest, and the diameters of the rings on both sides decrease in sequence, forming slopes on both sides. Multiple overlapping breeding ropes will slide into the gaps on both sides due to gravity; S3, using the squeezing force of the rotating scraper to separate most of the oysters from the culture rope, a small number of oysters at the end of the culture rope rotate with the movement of the scraper and hit the baffle (28) and fall off; S4. The breeding rope leaves the drum and continues to move forward along with the stem rope.

Images