CN113841660A - Special boat harrow for freshwater shellfish resource investigation - Google Patents
Special boat harrow for freshwater shellfish resource investigation Download PDFInfo
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- CN113841660A CN113841660A CN202111193008.0A CN202111193008A CN113841660A CN 113841660 A CN113841660 A CN 113841660A CN 202111193008 A CN202111193008 A CN 202111193008A CN 113841660 A CN113841660 A CN 113841660A
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- 235000015170 shellfish Nutrition 0.000 title claims abstract description 74
- 238000011835 investigation Methods 0.000 title claims abstract description 31
- 239000013505 freshwater Substances 0.000 title claims abstract description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000002689 soil Substances 0.000 claims abstract description 18
- 229910000831 Steel Inorganic materials 0.000 claims description 27
- 239000010959 steel Substances 0.000 claims description 27
- 238000003825 pressing Methods 0.000 claims description 20
- 238000009941 weaving Methods 0.000 claims description 4
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
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- 238000011161 development Methods 0.000 abstract description 8
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 238000009395 breeding Methods 0.000 abstract description 3
- 230000001488 breeding effect Effects 0.000 abstract description 3
- 239000012530 fluid Substances 0.000 description 17
- 230000008569 process Effects 0.000 description 11
- 241000193879 Corbicula fluminea Species 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 230000006378 damage Effects 0.000 description 3
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- 238000009826 distribution Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 241001465754 Metazoa Species 0.000 description 1
- 241000269799 Perca fluviatilis Species 0.000 description 1
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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
- A01K80/00—Harvesting oysters, mussels, sponges or the like
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- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Animal Husbandry (AREA)
- Biodiversity & Conservation Biology (AREA)
- Mechanical Means For Catching Fish (AREA)
- Farming Of Fish And Shellfish (AREA)
Abstract
The invention discloses a special boat harrow for freshwater shellfish resource investigation, which comprises a main body, a harrow handle and a sharp tooth part; the main body is of a box body structure and is used for storing the captured shellfish; a pull rope is arranged on one side of the main body and used for pulling the main body; the harrow handle is arranged on one side of the main body, is parallel to the top surface of the main body and is used for holding and controlling the main body; the tine part is arranged at one side of the inlet of the main body, which is far away from the harrow handle, and is used for raking shellfish under the water and soil; the tine part comprises a plurality of rake teeth which are arranged in sequence, the direction of the rake teeth is the same as that of the rake handle, and the tips of the rake teeth are far away from the main body. The method is used for investigating the benthic shellfish resources in the Hongze lake, has the characteristics of simple structure, convenient use and high accuracy, formulates the development and protection strategies of the shellfish resources according to the investigation result, determines the appropriate fishing area, the reasonable fishing amount and the artificial breeding scheme, and is beneficial to the protection and the reasonable development of the freshwater shellfish resources in the Hongze lake.
Description
Technical Field
The invention relates to the technical field of fishery, in particular to a boat rake special for freshwater shellfish resource investigation.
Background
The corbicula fluminea spiral shell is an important benthic shellfish resource in a Hongze lake area, is a characteristic fishery resource and a high-quality aquatic product of the Hongze lake, but due to the damage of the ecological environment caused by human activities, the resource amount of corbicula fluminea in the Hongze lake is obviously reduced, and meanwhile, the range of a corbicula fluminea high-density distribution area is obviously reduced. In order to avoid the exhaustion of corbicula fluminea resources caused by over-fishing, the research and evaluation of corbicula fluminea resources in Hongze lake are urgently needed, and scientific resource protection and recovery management measures are made to recover aquatic organism resources such as corbicula fluminea spiral shells and improve the ecological environment of water areas.
There are two main ways to fish benthic shellfish: firstly, the mactra-low is destructive and predatory fishing gear, which causes certain harm to fishery resources and environment in a fishing operation area, and shows that all organisms inhabited at the bottom without selection are caught, so that aquatic animal and plant resources are seriously damaged, and the aquatic organism community structure in the fishing operation area is also damaged; in the production process, the bottom mud is disturbed, so that the release of heavy metals and nutrient substances in the bottom mud is easily caused, the self-purification and restoration capability of the water body is reduced, the propagation, growth and inhabitation environments of fishes and benthos in the fishing operation area are damaged, and the health and stability of the ecological system of the fishing water area are threatened. Secondly, the manual rake-digging fishing has the characteristics of simple tool and less investment. For years, the water surface of the Hongze lake is wide, the fishing boat survey with a slower speed is mainly applied, the number of survey stations is relatively small, the accuracy of a resource assessment result is influenced to a certain extent, and the error is relatively high; the Hongze lake has no professional special tool for investigating the resources of the freshwater shellfish, and investigators often rent rakes for fishing fishermen when carrying out resource investigation, wherein the rakes have no unified standard on the main body, and the length and the width of the box opening of a rake box, the depth of the box, the mesh spacing of the main body and the like are different; secondly, the raking is not provided with rake teeth, and the rake teeth can not catch all the corbicula fluminea spiral shells inhabiting in the bottom mud, so that the accuracy of resource survey evaluation is influenced; thirdly, the lengths of the rake handles are different, and the operation is inconvenient because the water level fluctuation is large between the flood lake seasons, the rake handle is short in the high water level period and long in the bottom water level period; fourthly, the harrow handle has no length scale, which is inconvenient for measuring the water depth.
Disclosure of Invention
The invention aims to provide a special boat harrow for freshwater shellfish resource investigation, which aims to solve the problems in the prior art.
In order to achieve the purpose, the invention provides the following scheme: the invention provides a special boat harrow for freshwater shellfish resource investigation, which comprises a main body, a harrow handle and a sharp tooth part;
the main body is of a box-type structure and is used for storing the captured shellfish; a pull rope is arranged on one side of the main body and used for pulling the main body;
the harrow handle is arranged on one side of the main body, is parallel to the top surface of the main body and is used for holding and manipulating the main body;
the tine part is arranged at one side of the inlet of the main body, which is far away from the harrow handle, and is used for raking shellfish at the water bottom and under soil;
the tine part comprises a plurality of rake teeth which are arranged in sequence, the direction of the rake teeth is the same as that of the rake handle, and the tips of the rake teeth are far away from the main body.
Preferably, the main body comprises a frame opening and a box body fixedly connected with the frame opening, the frame opening is a rectangular hard frame, and the box body is fixed on one end face of the frame opening; the rake handle is fixed on the outer side of one side edge of the frame opening, the sharp tooth part is fixed on the outer side of the other side edge of the frame opening, and the rake handle and the sharp tooth part are oppositely arranged; and the frame opening is provided with a backflow preventing device on the inner wall of one side close to the sharp tooth parts.
Preferably, the box body is formed by weaving a plurality of longitudinal steel wires and a plurality of transverse steel wires; the diameter of the longitudinal steel wires is 0.5mm-5mm, and the distance between every two adjacent longitudinal steel wires is 6mm-10 mm; the diameter of the transverse steel wire is 4mm-6mm, and the distance between every two adjacent transverse steel wires is 80mm-120 mm.
Preferably, the backflow preventing device comprises a guide plate, the guide plate is hinged to the inner ring of the frame opening close to the pointed tooth part, and the guide plate is obliquely arranged towards the box body; and a torsion spring is fixed between the guide plate and the frame opening towards one side in the main body, and two ends of the torsion spring are fixedly connected with the guide plate and the frame opening respectively.
Preferably, a T-shaped block is fixed at the top end of the rake teeth, a T-shaped groove is formed in one end, connected with the rake teeth, of the frame opening, the T-shaped block is detachably connected with the T-shaped groove, and a locking device is arranged between the T-shaped block and the T-shaped groove.
Preferably, the locking device comprises two locking blocks, the two locking blocks are detachably connected with two sides of the top of the T-shaped block, one side, away from the T-shaped block, of each locking block is fixedly provided with a locking stud, the locking studs penetrate through and extend out of the frame opening, and one end, extending out of the frame opening, of each locking stud is connected with a locking nut in a threaded mode.
Preferably, the tines are pyramidal or conical, the tips of the tines facing away from the body.
Preferably, the harrow handle comprises a plurality of short rods with equal length, the connecting ends of the adjacent short rods are provided with connecting devices, and the outer walls of the short rods are marked with scale marks.
Preferably, the harrow handle is detachably connected with a pressing device, the pressing device comprises a fixing ring detachably connected with the harrow handle, a pressing shaft is fixed on the outer wall of the fixing ring, a pedal plate is arranged at one end of the pressing shaft, which is far away from the fixing ring, and the pedal plate is rotatably connected with the pressing shaft.
Preferably, the longitudinal section of the main body is an isosceles trapezoid, and the length of the side provided with the frame opening is greater than the length of the bottom side of the main body.
The invention discloses the following technical effects: the invention discloses a special boat rake for investigating freshwater shellfish resources, which is used for investigating the benthic shellfish resources in Hongze lakes and formulating the development and protection strategies of the shellfish resources; the invention is provided with a box-shaped main body, wherein a sharp tooth part and a harrow handle are respectively arranged on the opposite side surfaces of the main body, the sharp tooth part consists of a plurality of harrow teeth, the harrow teeth extend into soil, freshwater shellfish inhabiting in the soil are pulled out of the soil and are captured by the main body, the capture rate of the freshwater shellfish inhabiting in bottom mud is improved, and the harrow handle and a pull rope are used for pulling the main body and the harrow teeth to move underwater through a speedboat, so that the freshwater shellfish can move more quickly. The method is used for investigating the benthic shellfish resources in the Hongze lake, has the characteristics of simple structure, convenient use and high accuracy, formulates the development and protection strategies of the shellfish resources according to the investigation result, determines the suitable catching area, the reasonable catching amount and the artificial breeding scheme, and is beneficial to the protection and the reasonable development of the freshwater shellfish resources in the Hongze lake.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a top view of the special boat harrow for freshwater shellfish resource investigation of the invention;
FIG. 2 is a front view of the special boat harrow for freshwater shellfish resource investigation of the invention;
FIG. 3 is a side view of the special boat harrow for freshwater shellfish resource investigation of the invention;
FIG. 4 is an enlarged view of a portion of FIG. 2;
FIG. 5 is a schematic view of a backflow prevention device according to the present invention;
FIG. 6 is a partial enlarged view of B in FIG. 5;
FIG. 7 is a schematic view of the pressing device according to the present invention;
fig. 8 is a schematic structural view of a rake tine in embodiment 1 of the present invention;
fig. 9 is a schematic structural view of a rake tine according to embodiment 2 of the present invention;
wherein, 1-main body, 2-harrow handle, 3-tine part, 4-pull rope; 5-press device, 11-frame opening, 12-longitudinal steel wire, 13-transverse steel wire, 14-guide plate, 15-torsion spring, 16-T-shaped groove, 17-locking block, 18-locking stud, 19-locking nut, 21-short rod, 22-connecting device, 31-rake tooth, 32-T-shaped block, 33-fluid channel, 34-fluid inlet, 35-fluid outlet, 51-fixing ring, 52-press shaft, 53-pedal plate, 54-rotating shaft and 55-bolt component.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description thereof.
Example 1
Referring to fig. 1-8, the invention provides a special boat rake for freshwater shellfish resource investigation, which comprises a main body 1, a rake handle 2 and a sharp tooth part 3;
the main body 1 is of a box-shaped structure, and the main body 1 is used for storing the captured shellfish; a pull rope 4 is arranged on one side of the main body 1, and the pull rope 4 is used for pulling the main body 1;
the harrow handle 2 is arranged on one side of the main body 1, the harrow handle 2 is parallel to the top surface of the main body 1, and the harrow handle 2 is used for holding and controlling the main body 1;
the tine part 3 is arranged at one side of the inlet of the main body 1, which is far away from the harrow handle 2, and is used for raking shellfish under the water and soil;
the tine part 3 comprises a plurality of tines 31 which are arranged in sequence, the direction of the tines 31 is the same as that of the rabble arm 2, and the tips of the tines 31 are far away from the main body 1; the one end that stay cord 4 is close to main part 1 is divided into two strands, it is fixed with the both ends of the side of main part 1 fixed with sharp tooth portion 3 respectively, the other end is fixed at the bow or the topside position of speed boat, during the use, staff holds rake handle 2, put into the aquatic with main part 1 and sharp tooth portion 3, and in inserting sharp tooth portion 3 into the earth of lakebed hard, then hold rake handle 2 and do not put, open the ship this moment, utilize the strength pulling main part 1 and the motion of sharp tooth portion 3 at the lakebed bottom of the body of speed boat, sharp tooth portion 3 will perch the shellfish in lakebed earth outside stirring out earth, and catch by the main part 1 of hugging closely the lakebed bottom of the body.
According to a further optimized scheme, the main body 1 comprises a frame opening 11 and a box body fixedly connected with the frame opening 11, the frame opening 11 is a rectangular hard frame, and the box body is fixed on one end face of the frame opening 11; the rake handle 2 is fixed on the outer side of one side edge of the frame opening 11, the sharp tooth part 3 is fixed on the outer side of the other side edge of the frame opening 11, and the rake handle 2 and the sharp tooth part 3 are oppositely arranged; the inner wall of one side of the frame opening 11 close to the sharp tooth part 3 is provided with a backflow preventing device; the frame opening 11 is a metal frame made of hard metal, the shape is rectangular, two long sides of the rectangle are respectively provided with a sharp tooth part 3 and a rake handle 2, the sharp tooth part 3, the rake handle 2 and the frame opening 11 are positioned on the same plane, the sharp tooth part 3 and the rake handle 2 are both arranged on the long side of the frame opening 11, the box body is in a mesh bag shape, an inlet of the mesh bag is fixed with the frame opening 11, one side of the frame opening 11, which is close to the sharp tooth part 3, is provided with a backflow preventing device, so that shellfish in the box body can be prevented from flowing out of the frame opening 11 in the advancing process and the catching process, and investigation results are influenced.
The scheme is further optimized, and the box body is formed by weaving a plurality of longitudinal steel wires 12 and a plurality of transverse steel wires 13; the diameter of the longitudinal steel wire 12 is 0.5mm-5mm, and the distance between the adjacent longitudinal steel wires 12 is 6mm-10 mm; the diameter of the transverse steel wires 13 is 4mm-6mm, and the distance between every two adjacent transverse steel wires 13 is 80mm-120 mm; the box body is formed by weaving longitudinal steel wires 12 and transverse steel wires 13, wherein the transverse steel wires 13 are thick in diameter and exist as a framework of the box body, the transverse steel wires 13 are parallel to the frame opening 11, and the transverse steel wires 13 and the longitudinal steel wires 12 enable the box body to have sufficient water permeability; because the invention aims to carry out shellfish biological resource investigation, but not catching shellfish, the longitudinal steel wires 12 are distributed more densely, mainly aiming at capturing shellfish with smaller body size and ensuring higher investigation accuracy; the backflow prevention device is mainly used for preventing caught shellfish from falling from the frame opening 11 and influencing the investigation result.
According to a further optimized scheme, the backflow preventing device comprises a guide plate 14, the guide plate 14 is hinged to an inner ring of the frame opening 11 close to the pointed tooth part 3, and the guide plate 14 is obliquely arranged towards the box body of the main body 1; a torsion spring 15 is fixed between the guide plate 14 and the frame opening 11 towards one side in the main body 1, and two ends of the torsion spring 15 are fixedly connected with the guide plate 14 and the frame opening 11 respectively; in the process that the yacht pulls the main body 1 to advance, the shellfish at the bottom of the lake is scooped up by the frame opening 11 and enters the box body, in the process that the shellfish enters the box body, the shellfish presses the guide plate 14, and the guide plate 14 is pressed to the inside of the box body due to the fact that the guide plate 14 is hinged with the frame opening 11, and at the moment, the shellfish enters the box body; when the yacht stops moving forward and is ready to be harvested, the shellfish pressing the guide plate 14 slide into the box body, and the torsion spring 15 between the guide plate 14 and the frame opening 11 pushes up the guide plate 14 to prevent the shellfish in the box body from sliding out of the frame opening 11.
In a further optimized scheme, a T-shaped block 32 is fixed at the top end of the rake teeth 31, a T-shaped groove 16 is formed in one end, connected with the rake teeth 31, of the frame opening 11, the T-shaped block 32 is detachably connected with the T-shaped groove 16, and a locking device is arranged between the T-shaped block 32 and the T-shaped groove 16; when in use, the T-shaped block 32 is slid into the T-shaped groove 16 and then fixed by using the locking device, so that the gap between the adjacent rake teeth 31 can be flexibly adjusted, and the locking device is used for obtaining shellfish of different body types from the soil at the bottom of a lake; after use, the rake teeth 31 are removed for storage.
According to a further optimized scheme, the locking device comprises two locking blocks 17, the two locking blocks 17 are detachably connected with two sides of the top of the T-shaped block 32, a locking stud 18 is fixed on one side, away from the T-shaped block 32, of the locking block 17, the locking stud 18 penetrates through and extends out of the frame opening 11, and a locking nut 19 is connected to one end, extending out of the frame opening 11, of the locking stud 18 in a threaded mode; a long groove is formed in the position, penetrating through the frame opening 11, of the locking stud 18 and used for moving the locking device; when the T-shaped locking device is used, the T-shaped top end beam of the T-shaped block 32 is placed between the two opposite locking blocks 17, then the locking blocks 17 and the rake teeth 31 are all slid to the designated position of the frame opening 11, the locking nut 19 is rotated to enable the two locking blocks 17 to move relatively, the T-shaped block 32 is clamped and fixed on the frame opening 11, when the T-shaped locking device is taken down, the locking nut 19 is rotated reversely, the two opposite locking blocks 17 move reversely at the same time, the T-shaped block 32 is loosened, and then the rake teeth 31 are taken down.
In a further preferred embodiment, the rake teeth 31 are pyramid-shaped or cone-shaped, and the tips of the rake teeth 31 face away from the main body 1, and are preferably made of forged iron and have a cone shape, so as to reduce the resistance of the rake teeth 31 in the soil.
In a further optimized scheme, the harrow handle 2 consists of a plurality of short rods 21 with equal length, the connecting ends of the adjacent short rods 21 are provided with connecting devices 22, and the outer walls of the short rods 21 are marked with scale marks; the harrow handle 2 is formed by connecting a plurality of short rods 21, when the harrow works at different water depths, the harrow handle is connected with the short rods 21 with different numbers, is convenient to operate and is suitable for different water levels; the scales on the short rod 21 are used for displaying the working water depth, so that the recording is convenient; connecting device 22 is used for convenient quick connection quarter butt 21, and connecting device 22 can select the internal thread sleeve pipe, and the corresponding screw thread of quarter butt 21 both ends adaptation is screwed up during the installation can.
According to the further optimized scheme, the rake handle 2 is detachably connected with a pressing device 5, the pressing device 5 comprises a fixing ring 51 detachably connected with the rake handle 2, a pressing shaft 52 is fixed on the outer wall of the fixing ring 51, a pedal plate 53 is arranged at one end, far away from the fixing ring 51, of the pressing shaft 52, and the pedal plate 53 is rotatably connected with the pressing shaft 52; a rotating shaft 54 is arranged between the lower pressing shaft 52 and the pedal plate 53, so that the pedal plate 53 can rotate by taking the rotating shaft 54 as a center, a limiting structure is arranged on the pedal plate 53, the rotating angle of the pedal plate 53 is 90 degrees, and the pedal surface of the pedal plate 53 realizes the switching of two states of being parallel to the short rod 21 and being vertical to the short rod 21; when the fixing device is used, the fixing ring 51 is sleeved on the short rod 21, the fixing ring 51 is fixed on the short rod 21 through the bolt assembly 55, the pedal 53 is pulled to enable the pedal 53 to be perpendicular to the short rod 21, then a foot is stepped on the pedal 53 to apply force downwards, the force is transmitted to the sharp-tooth part 3 through the harrow handle 2, and finally the sharp-tooth part 3 is pressed into silt at the bottom of a lake without pressing down by hands, so that the fixing device is more convenient; when the novel electric bicycle is not used, the pedal plate 53 is pulled in the reverse direction, so that the pedal plate 53 is parallel to the short rod 21, the space is saved, and the collision injury caused by mistaken collision is prevented.
In a further optimized scheme, the longitudinal section of the main body 1 is an isosceles trapezoid, and the length of the side provided with the frame opening 11 is greater than that of the bottom side of the main body 1; in order to standardize the shape and size of the main body and the size of the rake teeth, the diameter of the bottom surface of the rake teeth 31 is 10 mm; the diameter of the harrow handle 2 is 35mm, and the length of the short rod is 1 m; the long side of the frame opening 11 is 740mm long, the short side is 250mm long, the rigidity of the main body 1 is 550mm, and the side lengths of the bottom side of the main body 1 are 650mm and 230mm respectively.
The using method comprises the following steps:
when the device is used, the device is firstly brought to an investigated water area by a speed boat, then one end of the pull rope 4 is fixed on a bow bollard of the speed boat, then the rake teeth 31 are taken out, the T-shaped blocks on the rake teeth 31 slide into the T-shaped grooves 16 of the frame opening 11 and are erected by two opposite locking blocks 17, the locking blocks 17 and the rake teeth 31 slide to proper positions of the frame opening 11 together, then the length of the locking stud 18 extending into the frame opening 11 is adjusted by the locking nut 19, the T-shaped blocks are firmly fixed by the two locking blocks 17 and are fixed on the frame opening 11 at the same time, the action is repeated, and enough rake teeth 31 are installed.
Screwing one section of short rod 21 to one side of the frame opening 11 opposite to the harrow teeth 31, then putting the main body 1 provided with the harrow teeth 31 and the short rod 21 into water, using a pull rope 4 for traction in the lowering process, and connecting the other short rod 21 through a connecting device 22 when the length of the short rod 21 in the lowering process is not enough until the tip of the harrow teeth 31 naturally contacts the bottom of a lake and the top end of the last section of short rod 21 is 1.5-1.8 m higher than the side of a yacht boat; the fixing ring 51 of the pressing device is sleeved on the short rod 21, then the fixing ring 51 is fixed on the short rod 21 through the bolt assembly 55, the pedal plate 53 is pulled to enable the pedal plate 53 to be perpendicular to the short rod 21, then the staff steps on the pedal plate 53 and transfers the weight of the staff to the pedal plate 53 completely, then the staff exerts force downwards, finally the rake teeth 31 are completely immersed into the soil on the lake bottom, the staff returns to the yacht from the pedal plate 53, and the pedal plate 53 is pulled back to be parallel to the short rod 21.
Tensioning the pull rope 4, and winding the redundant pull rope 4 on the cable pile to tighten the pull rope 4 between the cable pile and the frame opening 11; one worker holds the harrow handle 2 connected by the short rods 21, the other worker starts the yacht to advance along a preset navigation channel, and in the advancing process of the yacht, the underwater main body 1 and the sharp tooth parts 3 are pulled to move along with the yacht through the worker holding the harrow handle 2 and the pull rope 4 wound on the bow cable pile.
In the process that the tine parts 3 move forwards, the harrow teeth 31 push the shellfish perched in the soil at the bottom of the lake out of the soil, the shellfish outside the soil is shoveled into the main body 1 in the process that the frame opening 11 moves forwards, the shoveled shellfish presses the guide plate 14 to fall towards the inside of the main body 1 in the entering process, and the shellfish enters the main body 1 along the guide plate 14.
After the sampling is finished, the yacht is stopped, meanwhile, the underwater main body 1 and the rake teeth 31 in the soil are pulled upwards through the pull rope 4 and the rake handle 2, the bottom surface of the main body 1 is lower than the frame opening 11 due to the effects of the caught shellfish in the main body 1 and the pull rope 4, the shellfish all slide into the bottom of the main body 1 on the guide plate 14, after the external force is lost, the torsion spring 15 rebounds to push the guide plate 14 back to the original position, the shellfish in the main body 1 is prevented from sliding out, and the investigation result is enabled to have errors.
After the main body 1 and the sharp teeth part 3 are pulled out of the water surface, the shellfish in the main body 1 is poured out, the number and the body type distribution of the shellfish are counted, and the water depth data of the water area is recorded through the scales on the short rod 21.
Loosening the bolt assembly 55 on the fixing ring 51, removing the fixing ring 51 fixed on the short rod 21, and then sequentially unscrewing the short rod 21 and cleaning dirt; and loosening the locking nut 19, loosening the T-shaped block 32 clamped by the locking block 17, sequentially taking down the rake teeth 31, cleaning sludge on the rake teeth 31 and then recovering.
In order to further determine the advancing distance of the yacht, a mobile client of the GPS toolbox software is installed on the yacht, and the dragging distance is measured; the broadside of speed boat can set up an iron ring, wears harrow handle 2 in the iron ring, and more laborsaving dragging harrow handle 2, the staff only need hold harrow handle 2 can.
The method is used for investigating the benthic shellfish resources in the Hongze lake, has the characteristics of simple structure, convenient use and high accuracy, formulates the development and protection strategies of the shellfish resources according to the investigation result, determines the appropriate fishing area, the reasonable fishing amount and the artificial breeding scheme, and is beneficial to the protection and the reasonable development of the freshwater shellfish resources in the Hongze lake.
Example 2
Referring to fig. 1 to 7 and fig. 9, the present embodiment is different from embodiment 1 in that a fluid channel 33 is formed in the rake teeth 31 in this embodiment, a fluid inlet 34 is formed at the top end of the fluid channel 33 and extends out of the rake teeth 31, and a fluid outlet 35 is formed at the bottom end of the fluid channel 33 and extends out of the rake teeth 31. In use, the fluid inlet 34 is connected to a high pressure fluid, such as high pressure water or high pressure air, and the outlet of the fluid outlet 35 is directed towards the rake teeth 31. When the yacht pulls the equipment to advance, high-pressure fluid is introduced into the fluid channel 33 through the fluid inlet 34, then the high-pressure fluid is sprayed out through the fluid outlet 35 facing the advancing direction of the rake teeth 31, soil in the advancing direction is stirred, shellfish in the soil is washed out of the soil and captured by the main body 1, the shellfish is prevented from being crushed in the process of being pushed forward by the rake teeth 31, and meanwhile, the shellfish is prevented from being not pulled out of the soil by the rake teeth 31 to cause inaccurate investigation result.
In the embodiment, the high-pressure fluid is sprayed in the advancing direction of the rake teeth 31 to stir the mud at the bottom of the lake and to flush the shellfish in the mud, so that the number of the lost shellfish is reduced, the investigation result is more accurate, and the protection and reasonable development of the protection of the lake freshwater shellfish resource are facilitated.
In the description of the present invention, it is to be understood that the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the present invention.
The above-mentioned embodiments are only for describing the preferred mode of the present invention, and do not limit the scope of the present invention, and various modifications and improvements made to the technical solution of the present invention by those skilled in the art without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.
Claims (10)
1. A special boat harrow for freshwater shellfish resource investigation is characterized in that: comprises a main body (1), a harrow handle (2) and a sharp tooth part (3);
the main body (1) is of a box structure, and the main body (1) is used for storing the captured shellfish; a pull rope (4) is arranged on one side of the main body (1), and the pull rope (4) is used for pulling the main body (1);
the harrow handle (2) is arranged on one side of the main body (1), the harrow handle (2) is parallel to the top surface of the main body (1), and the harrow handle (2) is used for holding and manipulating the main body (1);
the tine part (3) is arranged at one side of the inlet of the main body (1) far away from the harrow handle (2) and is used for raking shellfish under the water and soil;
the tine part (3) comprises a plurality of tines (31) arranged in sequence, the direction of the tines (31) is the same as the direction of the rabble arm (2), and the tips of the tines (31) are far away from the main body (1).
2. The special boat harrow for freshwater shellfish resource investigation of claim 1, which is characterized in that: the main body (1) comprises a frame opening (11) and a box body fixedly connected with the frame opening (11), the frame opening (11) is a rectangular hard frame, and the box body is fixed on one end face of the frame opening (11); the harrow handle (2) is fixed on the outer side of one side edge of the frame opening (11), the tine part (3) is fixed on the outer side of the other side edge of the frame opening (11), and the harrow handle (2) and the tine part (3) are oppositely arranged; and a backflow preventing device is arranged on the inner wall of one side of the frame opening (11) close to the sharp tooth part (3).
3. The special boat harrow for freshwater shellfish resource investigation of claim 2, wherein: the box body is formed by weaving a plurality of longitudinal steel wires (12) and a plurality of transverse steel wires (13); the diameter of the longitudinal steel wire (12) is 0.5mm-1.5mm, and the distance between the adjacent longitudinal steel wires (12) is 6mm-10 mm; the diameter of the transverse steel wire (13) is 4mm-6mm, and the distance between every two adjacent transverse steel wires (13) is 80mm-120 mm.
4. The special boat harrow for freshwater shellfish resource investigation of claim 2, wherein: the backflow preventing device comprises a guide plate (14), the guide plate (14) is hinged to an inner ring, close to the sharp tooth part (3), of the frame opening (11), and the guide plate (14) is arranged towards the box body in an inclined mode; the guide plate (14) and face towards between the frame mouth (11) one side in the main part (1) is fixed with torsional spring (15), the both ends of torsional spring (15) respectively with guide plate (14) with frame mouth (11) rigid coupling.
5. The special boat harrow for freshwater shellfish resource investigation of claim 2, wherein: the top end of the rake teeth (31) is fixedly provided with a T-shaped block (32), one end of the frame opening (11) connected with the rake teeth (31) is provided with a T-shaped groove (16), the T-shaped block (32) is detachably connected with the T-shaped groove (16), and a locking device is arranged between the T-shaped block (32) and the T-shaped groove (16).
6. The special boat harrow for freshwater shellfish resource investigation of claim 5, wherein: locking device includes two latch segments (17), two latch segment (17) with T type piece (32) top both sides can be dismantled and be connected, latch segment (17) are kept away from one side of T type piece (32) is fixed with lock stud (18), lock stud (18) run through and stretch out frame mouth (11), lock stud (18) stretch out the one end threaded connection of frame mouth (11) has lock nut (19).
7. The special boat harrow for freshwater shellfish resource investigation of claim 1, which is characterized in that: the rake teeth (31) are pyramid-shaped or cone-shaped, and the tips of the rake teeth (31) face away from the main body (1).
8. The special boat harrow for freshwater shellfish resource investigation of claim 1, which is characterized in that: the harrow handle (2) comprises a plurality of short rods (21) with equal length, a connecting device (22) is arranged at the connecting end of each adjacent short rod (21), and scale marks are marked on the outer wall of each short rod (21).
9. The special boat harrow for freshwater shellfish resource investigation of claim 1, which is characterized in that: the harrow handle (2) is detachably connected with a pressing device (5), the pressing device (5) comprises a fixing ring (51) detachably connected with the harrow handle (2), a pressing shaft (52) is fixed on the outer wall of the fixing ring (51), one end, far away from the fixing ring (51), of the pressing shaft (52) is provided with a pedal plate (53), and the pedal plate (53) is rotatably connected with the pressing shaft (52).
10. The special boat harrow for freshwater shellfish resource investigation of claim 2, wherein: the longitudinal section of the main body (1) is isosceles trapezoid, and the length of the edge of the frame opening (11) is greater than that of the bottom edge of the main body (1).
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| CN202111193008.0A CN113841660B (en) | 2021-10-13 | 2021-10-13 | Special boat harrow for freshwater shellfish resource investigation |
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| CN202111193008.0A CN113841660B (en) | 2021-10-13 | 2021-10-13 | Special boat harrow for freshwater shellfish resource investigation |
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| CN113841660B CN113841660B (en) | 2024-08-23 |
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| CN113841660B (en) | 2024-08-23 |
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