CN108112546B - Large-area shallow sea purse seine grading trapping device - Google Patents

Abstract

The invention discloses a large-area shallow sea seine grading trapping device, which comprises a main net, supporting piles are arranged around the main net, a tightening ring is arranged on the upper edge of the main net, and a lifting cable is connected to one end of the tightening ring. The tightening ring passes through the inside of the mesh of the main net, and there are several floating bodies on the main net on both sides of the lifting cable, and the end of the tightening ring opposite to the lifting cable is provided with a supporting cable; the main net includes several layers of graded fishnets, graded The fishing nets meet at one place inside and limit cables are provided at this place, and several lifting devices are provided above the supporting piles. The advantage of the present invention is that graded fishing nets are used to complete graded trapping in shallow seas and improve trapping efficiency; through the rotation of the main net, fish schools automatically enter the net, the survival rate of individual fish in the fish school is high, and the economic benefit is good; it can prevent being caught Large fish block the mesh, improving the grading efficiency of the fishing net; when the lifting cable is lifted, the net opening of the main net is reduced to prevent the fish in the net from escaping, and the trapping efficiency is high.

Description

A large-area shallow sea seine classification trapping device

technical field

The invention relates to the technical field of facility fishing engineering, in particular to a large-area shallow sea seine grading trapping device.

Background technique

At present, the seine aquaculture project urgently needs to focus on the development of a new type of support pile-type seine aquaculture engineering structure, so that it has high safety performance, is suitable for large-area purse aquaculture in shallow seas, and can greatly save costs.

Shallow sea seine culture has a large area, no nets at the bottom, and the culture environment is closer to the natural ecology, but the feeding and catching methods of farmed fish are different from traditional cage culture, near-shore seine culture and marine fishing, so it is necessary to Carry out research and development of special trapping facilities for shallow water seine farming, including sound and light trapping technology, fish reef trapping technology, dark net trapping technology, etc. Special attention should also be paid to the fact that fish fry of different sizes may be stocked at the same time or intermittently released in seine culture, and fish size classification needs to be considered when trapping.

The authorization announcement number in the Chinese patent literature is CN 206341744U, and the authorization announcement date is July 21, 2017. The name of the utility model is "a fish trapping device", which discloses a fish trapping device, which includes two winches, two fixed Pile, two fixed cables, two pulley mechanisms, bait throwing machine, food table, lifting net, entrance net, cage net, funnel net A, funnel net B, fish collecting cage, the two pulleys of the two pulley mechanisms are respectively fixed on the two fixed piles Above, the lifting net is in a square shape. The lifting net has side A and side B. The two corners of side A are respectively connected to two hoists through two pulley mechanisms. The entrance net is in the shape of a square platform. The large port of the entrance net has side C and side D Side, D side and B side are sewn and fixed, and the two corners of C side are respectively fixed on two fixed piles by fixing cables. The net is sewn and fixed, the funnel net A is installed on the front section of the net, the middle section of the net is a screen, the funnel net B is installed on the back section of the net, and the entrance of the fish collection cage is docked with the small port of the funnel net B. The device has simple structure and ingenious design, and the fishing with the device has low labor intensity. Its shortcoming is that this utility model has limited catching carrying capacity, and is suitable for fishing in ponds or river banks with flat slopes and straight water shorelines, and is not suitable for trapping large areas of marine fish in shallow seas; releasing small fish through funnel nets, The filter port only has the funnel of the funnel net, and the filtration efficiency is low. When the funnel net is blocked by big fish, it loses the ability to screen large and small fish, which is not suitable for shallow sea seine fishing.

The traditional shallow sea seine fishing is usually casted with a large area of fishing nets, and the fish are driven from the edge of the fishing net to the shore, which cannot realize the hierarchical trapping of large-scale shallow sea seine fishing.

Therefore, it is necessary to design a high-level trapping device with high efficiency in purse seine fishing in large area of shallow sea.

Contents of the invention

The present invention overcomes the deficiency that the existing trapping device has low catch efficiency for shallow sea purse seine fishing, and provides a large-area shallow sea purse seine graded trapping device, which can complete shallow sea large-area trapping and trapping, and can classify trapping with high trapping efficiency.

In order to achieve the above object, the present invention adopts the following technical solutions.

A large-area shallow sea seine classification trapping device, including a main net, the main net is surrounded by supporting piles, the upper edge of the main net is provided with a tightening ring, one end of the tightening ring is connected with a lifting cable, and the tightening ring passes through the Inside the mesh of the main net, there are several floating bodies on the main net on both sides of the lifting cable, and a supporting cable is provided on the end of the tightening ring opposite to the lifting cable, and the supporting cable is connected to the supporting pile; the main net includes several layers Graded fishnets, the mesh size of graded fishnets decreases from outside to inside; graded fishnets converge at one point inside and there is a limit cable at this place, and several lifting devices are installed above the supporting piles. The limit cable, the lifting cable and the supporting cable are respectively connected with the hoisting device.

Before fishing, the graded net with small mesh is located inside, the fish swims under the main net, and the bait is thrown above the main net. Under the lure of the bait, the fish swims into the main net, and the limit cable is outward. When retracting, most of the bait is brought to the rear side by the main net, the fish swims to the rear of the main net, the supporting cable is relaxed, the main net turns and sinks to the side where the floating body is, catches the fish, retracts upward and lifts the cable , the main net and the school of fish inside it were pulled out of the water. The graded fishing net is used to complete the graded trapping in the shallow sea roundup, which improves the trapping efficiency; through the rotation of the main net, the fish school automatically enters the net, the survival rate of the individual fish in the fish school is high, and the economic benefit is good; the fish school is lured to the main net by the bait Swimming inside, big fish and small fish are in order, which can prevent the mesh from being blocked by big fish and improve the grading efficiency of the fishing net; The net mouth is reduced to prevent the fish in the net from escaping, and the trapping efficiency is high.

Preferably, the floating body is spherical, and the position of the floating body on the main net is fixed. The buoyancy effect of the spherical floating body is stable, which is conducive to keeping the main net in a fixed position, which is convenient for trapping fish when bait is sprinkled, and improves the catching efficiency.

Preferably, there are two supporting piles, the main net is located between the two supporting piles, and there are two lifting cables, and the two lifting cables are respectively located on different supporting piles.

The supporting piles are used as the operating platform for seine fishing, which is convenient for lifting the main net to complete the fish transportation; there are two lifting cables, and the pressure of lifting the fishing net is small; the lifting cables are respectively located on different supporting piles, and by adjusting the two The length of the lifting cable can complete the adjustment of the position of the main net, which is convenient for fishing.

Preferably, the limiting cable passes through each layer and grades the fishnet twice through a folded structure, one end of the limiting cable is fixed, and the other end is connected to the lifting device supporting the pile. One end of the limit cable is fixed, and the other end is connected with the lifting device. By adjusting the length of the limit cable, the main net can be lifted or lowered. The limit cable, the floating body, the support cable and the lifting cable cooperate to facilitate the arrangement of the net and the main net in the shallow sea, and improve the fishing efficiency.

Preferably, the area of the graded fishnet located in the outer layer is smaller than the area of the graded fishnet located in the inner layer. The fish are caught in grades through the graded net. The area of the inner graded net is larger than that of the outer graded net. When fishing with the main net, the positions of the inner net and the outer net are exchanged, and the inner net is wrapped outside the outer net. , can complete the graded fishing of fish and improve the fishing efficiency.

Preferably, a ring-shaped fixing bracket is arranged in the graded fishnet. The shape of the main net is supported by the fixed bracket, and the limit position of the limit cable is in the fixed bracket, and the shape of the graded fishing net can be maintained before catching fish through the fixed bracket, which is conducive to graded fishing and improves fishing efficiency.

Preferably, the supporting piles are prefabricated piles. The production is convenient and the structure is simple.

The benefits of the present invention are:

1. The graded fishing nets are used to complete the graded trapping during the shallow sea roundup, which improves the trapping efficiency;

2. Through the automatic rotation of the main net, the fish school automatically enters the net, the survival rate of individual fish in the fish school is high, and the economic benefit is good;

3. The fish are lured by the bait to swim into the main net, and the big fish and small fish are in order, which can prevent the mesh from being blocked by big fish and improve the classification efficiency of the fishing net;

4. When the lifting cable is lifted, the tightening ring shrinks automatically, and when the main net is lifted out of the water, the opening of the main net is reduced to prevent the fish in the net from escaping, and the trapping efficiency is high;

5. The lifting cables are respectively located on different support piles. By adjusting the length of the two lifting cables, the position of the main net can be adjusted to facilitate fishing.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

Fig. 2 is a schematic structural view of the present invention when casting a net on the seabed.

Fig. 3 is a schematic diagram of the structure of the present invention when the net is received.

In the figure: main net 1 graded fish net 11 tightening ring 2 support pile 3 lift cable 4 floating body 5 support cable 6 limit cable 7 lifting device 8 fixed bracket 9.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

Among Fig. 1, a kind of large-area shallow sea seine grading trapping device comprises main net 1, is provided with supporting pile 3 around main net 1, and supporting pile 3 is provided with two, and supporting pile 3 is prefabricated pile, drives The depth of entry meets the vertical and horizontal bearing capacity of the device and the fish caught. The main grid 1 is located between two supporting piles 3 . The upper edge of the main net 1 is provided with a tightening ring 2, and one end of the tightening ring 2 is connected with a lifting cable 4, and two lifting cables 4 are provided, and the two lifting cables 4 are respectively located on different supporting piles 3. The tightening ring 2 passes the mesh inside of the main net 1, and the main net 1 on both sides of the lifting cable 4 is provided with some floating bodies 5, and the floating bodies 5 are spherical, and the position of the floating bodies 5 on the main net 1 is fixed. On the tightening ring 2, the opposite end of the lifting cable 4 is provided with a support cable 6, and the support cable 6 is connected to the support pile 3; Decrease inwards successively; Grading crosses fishnet 11 and converges in one place inside and is provided with limit cable 7 at this place, is provided with several hoisting devices 8 above support pile 3, limit cable 7, lifts cable 4 and The supporting cables 6 are respectively connected with lifting devices 8 . Hoisting device 8 comprises hoisting pulley, and the top of hoisting pulley and pile can manually and electrically carry out the catch operation by hoisting pulley and hinge. The limit cable 7 passes through each layer and grades the fishnet 11 twice through the folded structure. One end of the limit cable 7 is fixed, and the other end is connected to the lifting device 8 supporting the pile 3 . The area of the graded fishnet 11 located in the outer layer is smaller than the area of the graded fishnet 11 located in the inner layer. An annular fixed support 9 is arranged in the fish net 11 that has been graded.

As shown in Figure 1, before fishing, the graded fishing net 11 with a small mesh size is located on the inner side, and the fish will swim below the main net 1, and the bait is thrown above the main net 1, and the fish will move towards it under the lure of the bait. Swimming in the fishing net, when going to Figure 2, when the limit cable 7 is retracted outward, most of the bait is brought to the rear side by the main net 1, and the fish swims to the rear of the main net 1, loosen the support cable 6, and the main net 1 rotates and sinks to the side where the floating body 5 is located, as shown in Figure 3, catches the school of fish, retracts upwards and lifts the cable 4, and the main net 1 and the school of fish inside it are pulled out of the water. The graded fishing net 11 completes the graded trapping in the shallow sea roundup and improves the trapping efficiency; the fish school automatically enters the net through the rotation of the fishing net, the survival rate of the individual fish in the fish school is high, and the economic benefit is good; the fish school is lured to the main net by the bait Swimming in 1, big fish and small fish are in an orderly manner, which can prevent the mesh from being blocked by big fish and improve the classification efficiency of the fishing net; , the net mouth of the main net 1 is reduced to prevent the fish in the net from escaping, and the trapping efficiency is high.

The floating body 5 provides the gravity of the buoyancy support device, so that one end of the main net 1 is suspended in the water, and the lifting cable ensures the safety of the trapping device. Each level realizes the grading of the caught fish by grading the fish net 11 with different mesh sizes , the size of the grade can be changed in time according to the situation on the spot.

Realize one-time grading to trap and catch farmed fish. The one on the pile is matched with the crane, and the catch device is firm and has high safety performance. The floating body 5 provides buoyancy and maintains the shape of the upper layer of net clothing, and the fixed support 9 maintains the shape of the lower layer of net clothing to ensure the quantity and quality of fishing. The construction is simple, economical and environmentally friendly, popular and sustainable.

Claims (7)

1. A large-area shallow sea seine grading trapping device is characterized in that it comprises a main net, and supporting piles are arranged around the main net, and the upper edge of the main net is provided with a tightening ring, and one end of the tightening ring is connected with a lift The cable, the tightening ring passes through the mesh of the main net, and there are several floating bodies on the main net on both sides of the lifting cable, and the end of the tightening ring opposite to the lifting cable is provided with a supporting cable, and the supporting cable is connected to the supporting pile. ; The main net includes several layers of graded fishnets, the mesh size of which is gradually reduced from the outside to the inside; Several hoisting devices, the limit cable, the lifting cable and the support cable are respectively connected with the lifting device. 2. A large-area shallow sea purse seine grading trapping device according to claim 1, wherein the floating body is spherical, and the position of the floating body on the main net is fixed. 3. A kind of large-area shallow sea purse seine grading trapping device according to claim 1 or 2, characterized in that, the supporting piles are provided with two, the main net is located between the two supporting piles, and the cable is set There are two, and the two lifting cables are respectively located on different support piles. 4. A kind of large-area shallow sea purse seine grading trapping device according to claim 1, characterized in that, the position-limiting cable passes through each layer and grades the fishnet twice through a folded structure, and one end of the position-limiting cable is fixed. The other end is attached to a lifting device that supports the pile. 5. A large-area shallow sea seine grading trapping device according to claim 1 or 2, characterized in that the area of the grading nets located in the outer layer is smaller than the area of the grading nets located in the inner layer. 6. A large-area shallow sea purse seine grading trapping device according to claim 1 or 2, characterized in that, said grading fishnet is provided with an annular fixing bracket. 7. A large-area shallow sea seine grading trapping device according to claim 1 or 2, characterized in that the supporting piles are prefabricated piles.