CN111903625B - Bottom trawl - Google Patents
Bottom trawl Download PDFInfo
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- CN111903625B CN111903625B CN202010801529.9A CN202010801529A CN111903625B CN 111903625 B CN111903625 B CN 111903625B CN 202010801529 A CN202010801529 A CN 202010801529A CN 111903625 B CN111903625 B CN 111903625B
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- support
- bottom line
- connecting lugs
- outer frame
- rolling support
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- 238000005096 rolling process Methods 0.000 claims abstract description 135
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 12
- 238000000034 method Methods 0.000 description 11
- 239000000463 material Substances 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 238000010408 sweeping Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K73/00—Drawn nets
- A01K73/02—Trawling nets
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K73/00—Drawn nets
- A01K73/02—Trawling nets
- A01K73/04—Devices for spreading or positioning, e.g. control thereof
- A01K73/053—Ground-line rollers
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- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Animal Husbandry (AREA)
- Biodiversity & Conservation Biology (AREA)
- Toys (AREA)
Abstract
The invention relates to a bottom line of a bottom trawl, which is positioned at a lower net mouth of a trawl body, a plurality of first rolling supporting bodies are arranged at the arc top position in the middle of the bottom line, each first rolling supporting body comprises a first supporting ball which can rotate around the arc top of the bottom line, a plurality of second rolling supporting bodies are arranged on straight line sections on two sides of the bottom line, each second rolling supporting body comprises a second supporting ball, the second supporting balls can rotate along a central axis perpendicular to the straight line sections on two sides of the bottom line, two ends of the bottom line are respectively connected with a traction rolling supporting body, each traction rolling supporting body comprises a rotatable supporting roller, and each first rolling supporting body, each second rolling supporting body and each traction rolling supporting body are of a heavy structure passing through a counterweight. The invention can ensure that the bottom line falls to the bottom completely, and is beneficial to reducing the damage to the seabed bottom.
Description
Technical Field
The invention belongs to the technical field of trawl, and particularly relates to a bottom trawl bottom line.
Background
The trawl is a movable filtering fishing gear, and the bag-shaped fishing gear is towed by means of the power of a fishing boat, so that marine organisms are towed into the trawl in a water area through which the marine organisms pass, and the purpose of fishing production is achieved. The bottom trawl is a net tool for trawling along the seabed, and the fishing object is mainly bottom benthonic fishery organisms.
The problem of large damage to the ocean bottom is generally existed in the existing bottom trawl net bottom line, the bottom of the bottom trawl net mouth is provided with the sinkers, and the counterweights of the sinkers can seriously scratch the ocean bottom in the towing process. In the prior art, a rolling type supporting structure is arranged on the trawl bottom line, for example, the utility model patent with the application number 201621058986.9 discloses a rolling device of the trawl bottom line, but a star gear plate is easy to hook the mesh of a net in the rolling process to cause winding; in addition, because the bottom line is arc, in the towing process, when the advancing direction of the plate surface and the trawl is inconsistent, the star-shaped gear plates arranged at two sides of the arc bottom line can not realize normal rolling and scratch the ocean bottom materials.
Disclosure of Invention
The technical problem to be solved by the invention is to provide the bottom trawl bottom line, which can ensure that the bottom line falls to the bottom completely and is beneficial to reducing the damage to the seabed bottom.
The technical scheme adopted by the invention for solving the technical problems is to provide a bottom net, the bottom net is positioned at a net opening below a net body (1) of the bottom net, a plurality of first rolling supporting bodies are arranged at the arc top position in the middle of the bottom net, each first rolling supporting body comprises a first supporting ball capable of rotating around the arc top of the bottom net, a plurality of second rolling supporting bodies are arranged on straight line sections on two sides of the bottom net, each second rolling supporting body comprises a second supporting ball, the second supporting balls can rotate along a central axis perpendicular to the straight line sections on two sides of the bottom net, two ends of the bottom net are respectively connected with a traction rolling supporting body, each traction rolling supporting body comprises a rotatable supporting roller, and each first rolling supporting body, each second rolling supporting body and each traction rolling supporting body are of a heavy structure passing through a counterweight.
The first rolling support body further comprises a central shaft and connecting rings, the first support balls are rotatably sleeved on the central shaft in the radial direction, the connecting rings are respectively arranged at the two ends of the central shaft, the bottom line is connected with the connecting rings, and the connecting rings of the adjacent first rolling support bodies are connected through connecting buckles.
The first rolling support body further comprises a hollow columnar limit sleeve sleeved and fixed on the bottom line, the first support balls are rotatably sleeved on the bottom line along the radial direction, and a plurality of first support balls are distributed at intervals and are limited between adjacent first support balls through the limit sleeve.
The second rolling support body further comprises an annular outer frame, a support rotating shaft and connecting lugs, the two opposite sides of the second support ball are rotatably supported inside the annular outer frame in the radial direction through the support rotating shaft, the connecting lugs are respectively fixed on the two opposite sides of the annular outer frame, the direction of the opposite arrangement of the connecting lugs is mutually perpendicular to the direction of the opposite arrangement of the support rotating shaft, and the bottom line is connected with the connecting lugs.
The second rolling support body further comprises a hollow columnar fixed sleeve and a first supporting frame which is 7-shaped, the fixed sleeve is fixedly sleeved on the straight line segments on two sides of the bottom line, the second supporting balls are arranged below the fixed sleeve, two sides of the second supporting balls are respectively connected with the fixed sleeve through first supporting frames which are symmetrically arranged, and two sides of the second supporting balls are rotatably supported on the first supporting frames on two sides along the radial direction.
The second rolling support body further comprises a hollow columnar fixing sleeve and a T-shaped second support frame, the three second support balls are uniformly distributed on the outer side of the fixing sleeve at intervals along the circumferential direction of the fixing sleeve, second support frames are respectively arranged between the adjacent second support balls, the second support frames are fixed on the fixing sleeve, two sides of each second support ball are rotatably supported on the adjacent second support frames along the radial direction, and the fixing sleeve is fixedly sleeved on straight line sections on two sides of the bottom line.
The traction rolling support body further comprises a chamfer rectangular outer frame, a support center rotating shaft and connecting lugs, wherein the whole support roller is cylindrical, convex ribs are uniformly arranged on the outer circumferential surface of the support roller at intervals along the circumferential direction, the opposite ends of the support roller along the central shaft direction are rotatably supported inside the outer frame through the support center rotating shaft respectively, the connecting lugs are fixed at the corresponding middle positions of the opposite sides of the outer frame, the direction of the opposite arrangement of the connecting lugs is mutually perpendicular to the direction of the opposite arrangement of the support center rotating shaft, the end part of the bottom steel is connected with one side of the connecting lugs, and the other side of the connecting lugs are connected with the screen plate through sweep line.
The connecting earrings connected with the end parts of the bottom lines can also be arranged at the outer positions of one sides of the outer frames facing the bottom lines relative to the middle positions, and when the traction rolling support bodies are dragged and rolled, the inner side ends of the outer frames are inclined forwards towards the advancing direction of the bottom trawl.
The supporting roller can be integrally in a frustum shape, convex ribs are uniformly arranged on the outer circumferential surface at intervals along the circumferential direction, and the inner side end of the supporting roller has a larger radial dimension.
Advantageous effects
Firstly, in the invention, the bottom line of the bottom trawl is reasonably configured and designed through the first rolling support body, the second rolling support body and the traction rolling support body respectively, so that the bottom line forms an approximately triangular bottom structure on the whole, and the use of the traditional bottom line is avoided. On one hand, the method can ensure that the bottom line falls to the bottom completely, is favorable for keeping the stability of the shape of the bottom line in the towing process, and ensures the fishing effect of the bottom trawl; on the other hand, the first rolling support body, the second rolling support body and the traction rolling support body can play a supporting role on the bottom line, and most of line sections of the bottom line do not need to be balanced, so that damage to the bottom substrate of the bottom line in the operation process can be effectively reduced, and the structural design of the first rolling support body, the second rolling support body and the traction rolling support body can furthest reduce damage to the bottom substrate in the rotation process.
Secondly, the invention also provides an embodiment of the 'camber' traction rolling support body, and the traction rolling support body has the effect of pulling the trawl outwards in the process of being towed and moved, so that on one hand, the effect of rapidly pulling the width of the trawl opening can be achieved when the bottom trawl is put in, and on the other hand, the width of the bottom line can be expanded, and the effect of increasing the sea sweeping area of the bottom trawl opening can be achieved.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic structural view of a first embodiment of a first rolling support body.
Fig. 3 is a schematic structural view of a second embodiment of the first rolling support body.
Fig. 4 is a schematic structural view of a first embodiment of a second rolling support body.
Fig. 5 is a schematic structural view of a second embodiment of a second rolling support body.
Fig. 6 is a schematic structural view of a third embodiment of a second rolling support body.
Fig. 7 is a schematic structural view of a first embodiment of the traction rolling support.
Fig. 8 is a schematic structural view of a second embodiment of traction rolling support.
Fig. 9 is a schematic structural view of a third embodiment of a traction rolling support.
Detailed Description
The application will be further illustrated with reference to specific examples. It is to be understood that these examples are illustrative of the present application and are not intended to limit the scope of the present application. Furthermore, it should be understood that various changes and modifications can be made by one skilled in the art after reading the teachings of the present application, and such equivalents are intended to fall within the scope of the application as defined in the appended claims.
The bottom line 3 is positioned at the lower net mouth of the trawl net body 1, and the upper net mouth of the trawl net body 1 is provided with a floater line 2, as shown in figure 1.
The arc top position in the middle of the bottom line 3 is provided with a plurality of first rolling support bodies 4, and the number of the first rolling support bodies 4 can be adjusted according to the radian of the bottom line 3 and the counterweight requirement. The first rolling support body 4 comprises a first support ball 4-1 which can rotate around the arc top of the bottom line 3 and is used for supporting the arc top position of the bottom line 3.
A plurality of second rolling support bodies 5 are arranged on the straight line sections on two sides of the bottom line 3 at intervals, and the number of the second rolling support bodies 5 can be adjusted according to the counterweight requirement. The second rolling support body 5 comprises a second support ball 5-1, and the second support ball 5-1 can rotate along a central axis perpendicular to the straight line segments at two sides of the bottom line 3 and is used for supporting the positions of the straight line segments at two sides of the bottom line 3.
The two ends of the bottom line 3 are respectively connected with the traction rolling support bodies 6, and the traction rolling support bodies 6 are connected with the net plate through sweep line. The traction rolling support body 6 comprises rotatable support rollers 6-1 capable of supporting the end of the bottom line 3.
The first rolling support body 4, the second rolling support body 5 and the traction rolling support body 6 are all sinking structures designed through reasonable weights, so that the bottom line 3 of the trawl can completely fall down, and the bottom line 3 integrally forms a sinking structure similar to a triangle, thereby being beneficial to keeping the stability of the shape of the bottom line 3 in the towing process. It should be noted that, the expression "the bottom line 3 falls to the bottom completely" herein does not mean that the bottom line 3 directly contacts and scrapes the bottom of the sea; in contrast, the first rolling support body 4, the second rolling support body 5 and the traction rolling support body 6 can play a supporting role on the bottom line 3, and most line sections of the bottom line 3do not need to be balanced, a certain lifting force can be generated under the action of water flow during operation to keep a suspension state close to the bottom material, and damage of the bottom line to the bottom material on the sea bottom in the operation process can be effectively reduced.
Fig. 2 shows a specific embodiment of the first rolling support body 4. The first rolling support body 4 includes a first support ball 4-1, a central shaft 4-2, and a connection ring 4-3. The first supporting ball 4-1 is rotatably sleeved on the central shaft 4-2 along the radial direction, and the two ends of the central shaft 4-2 are respectively provided with a connecting ring 4-3. The adjacent first rolling support bodies 4 are connected with the adjacent connecting rings 4-3 through connecting buckles 4-4 to realize serial connection, and the whole formed by the first rolling support bodies 4 and the connecting buckles 4-4 is connected with the bottom line 3 through the connecting rings 4-3 at two ends. Under this structure, the arc top position of the bottom line 3 is directly replaced by a chain structure consisting of the first rolling support body 4 and the connecting buckle 4-4.
Another embodiment of the first rolling support body 4 is shown in fig. 3. The first rolling support body 4 comprises a first support ball 4-1 and a hollow columnar limit sleeve 4-5 sleeved and fixed on the bottom line 3. The first supporting balls 4-1 are rotatably sleeved on the bottom line 3 along the radial direction, the first supporting balls 4-1 are distributed at intervals at the arc top position of the bottom line 3, and the adjacent first supporting balls 4-1 are limited by a limiting sleeve 4-5.
Fig. 4 shows a specific embodiment of the second rolling support body 5. The second rolling support body 5 comprises a second support ball 5-1, an annular outer frame 5-2, a support rotating shaft 5-3 and a connecting lug 5-4. Opposite sides of the second supporting ball 5-1 are rotatably supported inside the annular outer frame 5-2 in the radial direction by the supporting rotary shaft 5-3, and the bottom of the second supporting ball 5-1 is lower than the bottom of the annular outer frame 5-2. The opposite sides of the annular outer frame 5-2 are respectively fixed with connecting lugs 5-4, and the opposite arrangement direction of the connecting lugs 5-4 is mutually perpendicular to the opposite arrangement direction of the supporting rotating shaft 5-3. The second rolling support bodies 5 are connected to the straight line sections on two sides of the bottom line 3 at intervals, the bottom line 3 is connected with the connecting lugs 5-4, and the adjacent second rolling support bodies 5 are also connected through the bottom line 3.
Another embodiment of the second rolling support 5 is shown in fig. 5. The second rolling support body 5 comprises a second support ball 5-1, a hollow cylindrical fixed sleeve 5-5 and a first support frame 5-6 in a shape of 7. The fixed sleeve 5-5 is fixedly sleeved on the straight line sections on two sides of the bottom line 3, the second supporting ball 5-1 is arranged below the fixed sleeve 5-5, two sides of the second supporting ball 5-1 are respectively connected with the fixed sleeve 5-5 through symmetrically arranged first supporting frames 5-6, two sides of the second supporting ball 5-1 are rotatably supported at one ends of the first supporting frames 5-6 on two sides along the radial direction, and the other ends of the first supporting frames 5-6 are fixedly connected with the fixed sleeve 5-5. The second rolling support body 5 with the structure can be directly sleeved on the bottom line 3 through the fixing sleeve 5-5, so that the need of connecting multiple sections of bottom lines is avoided.
Another embodiment of the second rolling support 5 is shown in fig. 6. The second rolling support body 5 comprises a second support ball 5-1, a hollow cylindrical fixed sleeve 5-5 and a second support frame 5-7 in a T shape. The three second supporting balls 5-1 are uniformly distributed at intervals on the outer side of the fixed sleeve 5-5 along the circumferential direction of the fixed sleeve 5-5, and second supporting frames 5-7 are respectively arranged between the adjacent second supporting balls 5-1. The inner ends of the second supporting frames 5-7 are fixed on the fixed sleeve 5-5, the two opposite ends of the outer side are respectively connected with the adjacent second supporting balls 5-1 in a shaft way, and two sides of the second supporting balls 5-1 are rotatably supported on the adjacent second supporting frames 5-7 along the radial direction. The second rolling support body 5 is fixedly sleeved on the straight line sections at the two sides of the bottom line 3 through the fixing sleeve 5-5, so that the need of connecting the bottom line of a plurality of sections is avoided. In such a structure of the second rolling support body 5, the second support balls 5-1 are distributed around the circumference of the bottom rail 3 in a regular triangle, and can support the bottom rail 3 well even if the bottom rail 3 is twisted during operation.
Fig. 7 shows a specific embodiment of the traction roller support 6. The traction rolling support body 6 comprises a support roller 6-1, a chamfer and rectangular outer frame 6-2, a support center rotating shaft 6-3 and a connecting lug 6-4. The whole supporting roller 6-1 is cylindrical, and convex ribs 6-5 are uniformly arranged on the outer circumferential surface at intervals along the circumferential direction, so that the adhesive force between the supporting roller and the seabed substrate is improved, and the ground grabbing effect is improved. Opposite ends of the supporting roller 6-1 in the central axis direction are rotatably supported inside the outer frame 6-2 by supporting the central rotation shaft 6-3, respectively. The connecting earrings 6-4 are fixed at the corresponding middle positions of the two opposite sides of the outer frame 6-2, and the opposite arrangement directions of the connecting earrings 6-4 are mutually perpendicular to the opposite arrangement directions of the supporting center rotating shaft 6-3. The end part of the bottom line 3 is connected with one side of the connecting earring 6-4, and the other side of the connecting earring 6-4 is connected with the net plate through sweep line. Through reasonable counterweight design, the front end of the bottom line 3 of the bottom trawl is dropped to the bottom by utilizing the traction rolling support body 6.
Another embodiment of the traction rolling support 6 is shown in fig. 8, which is similar to the structure of fig. 7, except that the connecting lugs 6-4 connected to the ends of the bottom rail 3 are disposed at positions outside the side of the outer frame 6-2 facing the bottom rail 3 with respect to the middle position. The structure design enables the inner side end of the outer frame 6-2 to incline forward to the advancing direction of the bottom trawl when the traction rolling support body 6 is towed and rolled, so that a 'camber' traction rolling support body 6 structure is formed, the effect of pulling the trawl outwards is achieved in the operation process, the effect of rapidly pulling the width of the trawl opening can be achieved when the bottom trawl is put in, the width of the bottom line can be expanded, and the effect of increasing the sea sweeping area of the trawl opening of the bottom trawl is achieved.
As shown in fig. 9, another embodiment of the traction rolling support body 6 is similar to the structure of fig. 7, except that the support rollers 6-1 are arranged in a truncated cone-shaped structure as a whole, ribs 6-5 are uniformly arranged on the outer circumferential surface at intervals along the circumferential direction, and the inner side ends of the support rollers 6-1 have a larger radial dimension. Through the structural design of the frustum-shaped inclination of the supporting roller 6-1, an outwards inclined traction rolling support body 6 structure is formed, the effect of pulling the trawl outwards in the operation process is achieved, the effect of rapidly pulling the width of the trawl opening of the trawl can be achieved when the trawl is put in, the width of the bottom line can be expanded, and the effect of increasing the sea sweeping area of the trawl opening of the trawl can be achieved.
Claims (12)
1. The bottom line (3) is positioned at a lower net opening of the trawl net body (1), and is characterized in that: a plurality of first rolling support bodies (4) are arranged at the arc top position in the middle of the bottom line (3), the first rolling support bodies (4) comprise first support balls (4-1) which can rotate around the arc top of the bottom line (3), a plurality of second rolling support bodies (5) are arranged on straight line sections on two sides of the bottom line (3), the second rolling support bodies (5) comprise second support balls (5-1) and the second support balls (5-1) can rotate along the central axis vertical to the straight line sections on two sides of the bottom line (3), two ends of the bottom line (3) are respectively connected with traction rolling support bodies (6), the traction rolling support bodies (6) comprise rotatable support rollers (6-1), the first rolling support bodies (4), the second rolling support bodies (5) and the traction rolling support bodies (6) are all heavy structures through weights,
The first rolling support body (4) further comprises a central shaft (4-2) and a connecting ring (4-3), the first support ball (4-1) is rotatably sleeved on the central shaft (4-2) along the radial direction, the connecting rings (4-3) are respectively arranged at two ends of the central shaft (4-2), the bottom line (3) is connected with the connecting ring (4-3), the connecting rings (4-3) of the adjacent first rolling support bodies (4) are connected through connecting buckles (4-4),
The second rolling support body (5) further comprises an annular outer frame (5-2), a support rotating shaft (5-3) and connecting lugs (5-4), the opposite sides of the second support ball (5-1) are rotatably supported inside the annular outer frame (5-2) along the radial direction through the support rotating shaft (5-3), the connecting lugs (5-4) are respectively fixed on the opposite sides of the annular outer frame (5-2), the opposite setting directions of the connecting lugs (5-4) are mutually perpendicular to the opposite setting directions of the support rotating shaft (5-3), and the bottom line (3) is connected with the connecting lugs (5-4).
2. A trawl bottom line according to claim 1, wherein: the traction rolling support body (6) further comprises a chamfer rectangular outer frame (6-2), a support center rotating shaft (6-3) and connecting lugs (6-4), the whole support roller (6-1) is cylindrical, protruding ribs (6-5) are uniformly arranged on the outer circumferential surface of the support roller (6-1) at intervals along the circumferential direction, opposite ends of the support roller (6-1) along the central axis direction are respectively rotatably supported inside the outer frame (6-2) through the support center rotating shaft (6-3), the connecting lugs (6-4) are fixed at corresponding middle positions on opposite sides of the outer frame (6-2), the direction of the opposite arrangement of the connecting lugs (6-4) is mutually perpendicular to the direction of the opposite arrangement of the support center rotating shaft (6-3), the end part of the bottom wire (3) is connected with one side of the connecting lugs (6-4), and the other side of the bottom wire (3) is connected with the screen plate through sweep line.
3. A trawl bottom line according to claim 1, wherein: the traction rolling support body (6) further comprises a chamfer rectangular outer frame (6-2), a support center rotating shaft (6-3) and connecting lugs (6-4), the whole support roller (6-1) is cylindrical, ribs (6-5) are uniformly arranged on the outer circumferential surface of the support roller (6-1) at intervals along the circumferential direction, opposite ends of the support roller (6-1) along the central shaft direction are respectively rotatably supported in the outer frame (6-2) through the support center rotating shaft (6-3), the end part of the bottom line (3) is connected with the connecting lugs (6-4) on one side, the connecting lugs (6-4) on the other side are connected with the screen plate through sweep line, the connecting lugs (6-4) connected with the end part of the bottom line (3) are arranged at positions, which are deviated from one side of the outer frame (6-2) towards the middle position, of the bottom line (3), and when the traction rolling support body (6) is dragged, the inner side end of the outer frame (6-2) is forwards inclined towards the forward direction of the bottom line.
4. A trawl bottom line according to claim 1, wherein: the traction rolling support body (6) further comprises a chamfer rectangular outer frame (6-2), a support center rotating shaft (6-3) and connecting lugs (6-4), the whole support roller (6-1) is in a frustum shape, convex ribs (6-5) are uniformly arranged on the outer circumferential surface of the support roller (6-1) at intervals along the circumferential direction, the inner side ends of the support roller (6-1) are large in radial size, the opposite ends of the support roller (6-1) along the central axis direction are rotatably supported inside the outer frame (6-2) through the support center rotating shaft (6-3) respectively, the connecting lugs (6-4) are fixed at the middle positions corresponding to the opposite sides of the outer frame (6-2), the directions of the opposite setting of the connecting lugs (6-4) are mutually perpendicular to the directions of the opposite setting of the support center rotating shaft (6-3), the end parts of the bottom rail (3) are connected with the connecting lugs (6-4) on one side, and the connecting lugs (6-4) on the other side are connected with the screen plate through sweep line.
5. The bottom line (3) is positioned at a lower net opening of the trawl net body (1), and is characterized in that: a plurality of first rolling support bodies (4) are arranged at the arc top position in the middle of the bottom line (3), the first rolling support bodies (4) comprise first support balls (4-1) which can rotate around the arc top of the bottom line (3), a plurality of second rolling support bodies (5) are arranged on straight line sections on two sides of the bottom line (3), the second rolling support bodies (5) comprise second support balls (5-1) and the second support balls (5-1) can rotate along the central axis vertical to the straight line sections on two sides of the bottom line (3), two ends of the bottom line (3) are respectively connected with traction rolling support bodies (6), the traction rolling support bodies (6) comprise rotatable support rollers (6-1), the first rolling support bodies (4), the second rolling support bodies (5) and the traction rolling support bodies (6) are all heavy structures through weights,
The first rolling support body (4) also comprises a hollow columnar limit sleeve (4-5) sleeved and fixed on the bottom line (3), the first support balls (4-1) are rotatably sleeved on the bottom line (3) along the radial direction, a plurality of first support balls (4-1) are distributed at intervals, the adjacent first support balls (4-1) are limited by the limit sleeve (4-5),
The second rolling support body (5) further comprises a hollow columnar fixing sleeve (5-5) and a first supporting frame (5-6) which is 7-shaped, the fixing sleeve (5-5) is fixedly sleeved on the straight line sections on two sides of the bottom line (3), the second supporting ball (5-1) is arranged below the fixing sleeve (5-5), two sides of the second supporting ball (5-1) are respectively connected with the fixing sleeve (5-5) through the first supporting frames (5-6) which are symmetrically arranged, and two sides of the second supporting ball (5-1) are rotatably supported on the first supporting frames (5-6) on two sides along the radial direction.
6. A trawl bottom line according to claim 5, wherein: the traction rolling support body (6) further comprises a chamfer rectangular outer frame (6-2), a support center rotating shaft (6-3) and connecting lugs (6-4), the whole support roller (6-1) is cylindrical, protruding ribs (6-5) are uniformly arranged on the outer circumferential surface of the support roller (6-1) at intervals along the circumferential direction, opposite ends of the support roller (6-1) along the central axis direction are respectively rotatably supported inside the outer frame (6-2) through the support center rotating shaft (6-3), the connecting lugs (6-4) are fixed at corresponding middle positions on opposite sides of the outer frame (6-2), the direction of the opposite arrangement of the connecting lugs (6-4) is mutually perpendicular to the direction of the opposite arrangement of the support center rotating shaft (6-3), the end part of the bottom wire (3) is connected with one side of the connecting lugs (6-4), and the other side of the bottom wire (3) is connected with the screen plate through sweep line.
7. A trawl bottom line according to claim 5, wherein: the traction rolling support body (6) further comprises a chamfer rectangular outer frame (6-2), a support center rotating shaft (6-3) and connecting lugs (6-4), the whole support roller (6-1) is cylindrical, ribs (6-5) are uniformly arranged on the outer circumferential surface of the support roller (6-1) at intervals along the circumferential direction, opposite ends of the support roller (6-1) along the central shaft direction are respectively rotatably supported in the outer frame (6-2) through the support center rotating shaft (6-3), the end part of the bottom line (3) is connected with the connecting lugs (6-4) on one side, the connecting lugs (6-4) on the other side are connected with the screen plate through sweep line, the connecting lugs (6-4) connected with the end part of the bottom line (3) are arranged at positions, which are deviated from one side of the outer frame (6-2) towards the middle position, of the bottom line (3), and when the traction rolling support body (6) is dragged, the inner side end of the outer frame (6-2) is forwards inclined towards the forward direction of the bottom line.
8. A trawl bottom line according to claim 5, wherein: the traction rolling support body (6) further comprises a chamfer rectangular outer frame (6-2), a support center rotating shaft (6-3) and connecting lugs (6-4), the whole support roller (6-1) is in a frustum shape, convex ribs (6-5) are uniformly arranged on the outer circumferential surface of the support roller (6-1) at intervals along the circumferential direction, the inner side ends of the support roller (6-1) are large in radial size, the opposite ends of the support roller (6-1) along the central axis direction are rotatably supported inside the outer frame (6-2) through the support center rotating shaft (6-3) respectively, the connecting lugs (6-4) are fixed at the middle positions corresponding to the opposite sides of the outer frame (6-2), the directions of the opposite setting of the connecting lugs (6-4) are mutually perpendicular to the directions of the opposite setting of the support center rotating shaft (6-3), the end parts of the bottom rail (3) are connected with the connecting lugs (6-4) on one side, and the connecting lugs (6-4) on the other side are connected with the screen plate through sweep line.
9. The bottom line (3) is positioned at a lower net opening of the trawl net body (1), and is characterized in that: a plurality of first rolling support bodies (4) are arranged at the arc top position in the middle of the bottom line (3), the first rolling support bodies (4) comprise first support balls (4-1) which can rotate around the arc top of the bottom line (3), a plurality of second rolling support bodies (5) are arranged on straight line sections on two sides of the bottom line (3), the second rolling support bodies (5) comprise second support balls (5-1) and the second support balls (5-1) can rotate along the central axis vertical to the straight line sections on two sides of the bottom line (3), two ends of the bottom line (3) are respectively connected with traction rolling support bodies (6), the traction rolling support bodies (6) comprise rotatable support rollers (6-1), the first rolling support bodies (4), the second rolling support bodies (5) and the traction rolling support bodies (6) are all heavy structures through weights,
The first rolling support body (4) also comprises a hollow columnar limit sleeve (4-5) sleeved and fixed on the bottom line (3), the first support balls (4-1) are rotatably sleeved on the bottom line (3) along the radial direction, a plurality of first support balls (4-1) are distributed at intervals, the adjacent first support balls (4-1) are limited by the limit sleeve (4-5),
The second rolling support body (5) further comprises a hollow columnar fixing sleeve (5-5) and a second supporting frame (5-7) which is in a T shape, three second supporting balls (5-1) are uniformly distributed on the outer side of the fixing sleeve (5-5) at intervals along the circumferential direction of the fixing sleeve (5-5), the second supporting frames (5-7) are respectively arranged between the adjacent second supporting balls (5-1), the second supporting frames (5-7) are fixed on the fixing sleeve (5-5), two sides of each second supporting ball (5-1) are rotatably supported on the adjacent second supporting frames (5-7) along the radial direction, and the fixing sleeve (5-5) is fixedly sleeved on straight line sections on two sides of the bottom line (3).
10. A trawl bottom line according to claim 9, wherein: the traction rolling support body (6) further comprises a chamfer rectangular outer frame (6-2), a support center rotating shaft (6-3) and connecting lugs (6-4), the whole support roller (6-1) is cylindrical, protruding ribs (6-5) are uniformly arranged on the outer circumferential surface of the support roller (6-1) at intervals along the circumferential direction, opposite ends of the support roller (6-1) along the central axis direction are respectively rotatably supported inside the outer frame (6-2) through the support center rotating shaft (6-3), the connecting lugs (6-4) are fixed at corresponding middle positions on opposite sides of the outer frame (6-2), the direction of the opposite arrangement of the connecting lugs (6-4) is mutually perpendicular to the direction of the opposite arrangement of the support center rotating shaft (6-3), the end part of the bottom wire (3) is connected with one side of the connecting lugs (6-4), and the other side of the bottom wire (3) is connected with the screen plate through sweep line.
11. A trawl bottom line according to claim 9, wherein: the traction rolling support body (6) further comprises a chamfer rectangular outer frame (6-2), a support center rotating shaft (6-3) and connecting lugs (6-4), the whole support roller (6-1) is cylindrical, ribs (6-5) are uniformly arranged on the outer circumferential surface of the support roller (6-1) at intervals along the circumferential direction, opposite ends of the support roller (6-1) along the central shaft direction are respectively rotatably supported in the outer frame (6-2) through the support center rotating shaft (6-3), the end part of the bottom line (3) is connected with the connecting lugs (6-4) on one side, the connecting lugs (6-4) on the other side are connected with the screen plate through sweep line, the connecting lugs (6-4) connected with the end part of the bottom line (3) are arranged at positions, which are deviated from one side of the outer frame (6-2) towards the middle position, of the bottom line (3), and when the traction rolling support body (6) is dragged, the inner side end of the outer frame (6-2) is forwards inclined towards the forward direction of the bottom line.
12. A trawl bottom line according to claim 9, wherein: the traction rolling support body (6) further comprises a chamfer rectangular outer frame (6-2), a support center rotating shaft (6-3) and connecting lugs (6-4), the whole support roller (6-1) is in a frustum shape, convex ribs (6-5) are uniformly arranged on the outer circumferential surface of the support roller (6-1) at intervals along the circumferential direction, the inner side ends of the support roller (6-1) are large in radial size, the opposite ends of the support roller (6-1) along the central axis direction are rotatably supported inside the outer frame (6-2) through the support center rotating shaft (6-3) respectively, the connecting lugs (6-4) are fixed at the middle positions corresponding to the opposite sides of the outer frame (6-2), the directions of the opposite setting of the connecting lugs (6-4) are mutually perpendicular to the directions of the opposite setting of the support center rotating shaft (6-3), the end parts of the bottom rail (3) are connected with the connecting lugs (6-4) on one side, and the connecting lugs (6-4) on the other side are connected with the screen plate through sweep line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010801529.9A CN111903625B (en) | 2020-08-11 | 2020-08-11 | Bottom trawl |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010801529.9A CN111903625B (en) | 2020-08-11 | 2020-08-11 | Bottom trawl |
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| Publication Number | Publication Date |
|---|---|
| CN111903625A CN111903625A (en) | 2020-11-10 |
| CN111903625B true CN111903625B (en) | 2024-08-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010801529.9A Active CN111903625B (en) | 2020-08-11 | 2020-08-11 | Bottom trawl |
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| Country | Link |
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| CN (1) | CN111903625B (en) |
Citations (4)
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|---|---|---|---|---|
| FR614708A (en) * | 1925-08-31 | 1926-12-21 | Device or system of roller or bevel wheel fluted by straight or helical fins horizontally spreading the opening of fishing trawls | |
| FR2480079A1 (en) * | 1980-04-15 | 1981-10-16 | Coleman Et Fils | Oceangoing trawl net ballasting roll - has rollers on axis perpendicular to haulage direction turning in frame |
| WO2020129093A2 (en) * | 2018-12-21 | 2020-06-25 | Reval Seafood | Conical roller |
| CN213153556U (en) * | 2020-08-11 | 2021-05-11 | 中国水产科学研究院东海水产研究所 | Bottom line of bottom trawl |
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| US3250035A (en) * | 1963-10-29 | 1966-05-10 | Frank J Luketa | Trawl bobbin and chafing apron assembly |
| FR1388432A (en) * | 1964-04-07 | 1965-02-05 | Donso Natfabrik | Device of spherical rollers connected to the lower line of the mouth of a trawl |
| JP3013314B1 (en) * | 1999-04-09 | 2000-02-28 | 北九州市 | Seawater or freshwater purification method |
| BE1020206A5 (en) * | 2011-08-26 | 2013-06-04 | Bvba Snauwaert Joel | TREEKOR. |
| CN203105392U (en) * | 2013-03-19 | 2013-08-07 | 中国水产科学研究院东海水产研究所 | Bottom trawl sack gridding roller |
| CN103651277A (en) * | 2013-11-22 | 2014-03-26 | 大连海洋大学 | Wheel type truss rod dragging net |
| CN103947617A (en) * | 2014-04-10 | 2014-07-30 | 浙江海洋学院 | Bottom trawl |
| CN203788931U (en) * | 2014-04-10 | 2014-08-27 | 浙江海洋学院 | Novel fishing net |
| CN106472439B (en) * | 2016-09-18 | 2019-03-22 | 中国水产科学研究院东海水产研究所 | A kind of wear-resistant trawlnet bottom line production method |
| CN209185451U (en) * | 2018-11-28 | 2019-08-02 | 湖南鑫海股份有限公司 | A kind of trawlnet ground rope mechanism |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR614708A (en) * | 1925-08-31 | 1926-12-21 | Device or system of roller or bevel wheel fluted by straight or helical fins horizontally spreading the opening of fishing trawls | |
| FR2480079A1 (en) * | 1980-04-15 | 1981-10-16 | Coleman Et Fils | Oceangoing trawl net ballasting roll - has rollers on axis perpendicular to haulage direction turning in frame |
| WO2020129093A2 (en) * | 2018-12-21 | 2020-06-25 | Reval Seafood | Conical roller |
| CN213153556U (en) * | 2020-08-11 | 2021-05-11 | 中国水产科学研究院东海水产研究所 | Bottom line of bottom trawl |
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|---|---|
| CN111903625A (en) | 2020-11-10 |
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