CN212232757U

CN212232757U - Large mollusk collection device

Info

Publication number: CN212232757U
Application number: CN202020546610.2U
Authority: CN
Inventors: 胡莲; 沈振锋; 池仕运; 邹曦; 袁玉洁; 郑志伟
Original assignee: Institute Of Water Engineering Ecology Chinese Academy Of Sciences; Huazhong Agricultural University
Current assignee: Institute Of Water Engineering Ecology Chinese Academy Of Sciences; Huazhong Agricultural University
Priority date: 2020-04-14
Filing date: 2020-04-14
Publication date: 2020-12-29
Anticipated expiration: 2030-04-14

Abstract

The utility model relates to a large mollusk collecting device, which comprises a collecting net, wherein both ends of the collecting net are respectively provided with a head end opening and a tail end opening, the head end opening of the collecting net is provided with a collecting mechanism, and the collecting mechanism is fixedly connected with the edge of the collecting net; a shovel tongue is fixedly arranged at the bottom of the collecting mechanism, one end of the shovel tongue extends in a direction back to the collecting net, and a traction rope is further arranged on the collecting mechanism and fixedly connected with the collecting mechanism; the tail end opening of collecting the net is provided with collects the cage, collect the cage with collect net detachably sealing connection. The collecting device is convenient to mount and dismount, can collect benthonic mollusks with larger volume at the bottoms of water bodies with different flow velocities and complicated substrates, is convenient and labor-saving to use in the collecting process, has good stability, is not easy to turn on one's side, and has good mollusk collecting effect.

Description

Large mollusk collection device

Technical Field

The utility model relates to an experimental facilities technical field under water, concretely relates to large-scale mollusk collection device.

Background

The benthic mollusks are an important component of the water ecosystem, and not only have various species and wide feeding habits, but also are widely distributed. The benthic mollusk is used for internal regulation and control of the system, effectively reduces the content of eutrophic substances in the water body by absorbing the nutritive substances in the water area environment, obviously improves the water quality, and plays an important role in the material and energy circulation of an aquatic ecosystem. Particularly, the benthic mollusks have an indication effect on the water body, can reflect the water quality condition of the water area to a certain extent, are widely applied to monitoring water environment pollution, and are one of important biological indicators for evaluating whether the ecological environment of the water area is good or not.

At present, some benthonic mollusk collecting devices such as a Sorbon net, a handsheet, a trawl and a grab bucket type mud sampler are available on the market, and the Sorbon net and the handsheet are suitable for collecting benthonic animals in rivers, lakes, coastal shoals of reservoirs and other places capable of wading. Grab dredger is only suitable for collecting smaller individual benthonic animals growing in soft or silt type sediments of rivers, lakes, reservoirs, occasionally larger individual benthonic mollusks such as snails, clams, etc. And the trawl can be used to different waters, different bottom materials, but traditional triangle trawl weight is lighter and tow by triangle tether, water that is at the very fast velocity of flow easily floats and is difficult for sinking, lead to the collection effect not good, and square mouthful trawl is not conform to the water mechanics principle, at certain velocity of flow, or the complicated water of bottom material overturns easily and leads to the bottom of contact to change, the uneven net gape slope that makes of easy atress is towed to both sides tether in addition and breaks away from the bottom, direct influence gathers the effect, and it is inconvenient to collect the mollusk in the net.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to the technical problem who exists among the prior art, provide a large-scale mollusk collection device, solve the problem that current experimental facilities is not convenient for collect submarine large-scale mollusk.

The utility model provides an above-mentioned technical problem's technical scheme as follows:

a large mollusk collecting device comprises a collecting net, wherein a head end opening and a tail end opening are respectively arranged at two ends of the collecting net, a collecting mechanism is arranged at the head end opening of the collecting net, and the collecting mechanism is fixedly connected with the edge of the collecting net; a shovel tongue is fixedly arranged at the bottom of the collecting mechanism, one end of the shovel tongue extends in a direction back to the collecting net, and a traction rope is further arranged on the collecting mechanism and fixedly connected with the collecting mechanism; the tail end opening of collecting the net is provided with collects the cage, collect the cage with collect net detachably sealing connection.

Further, collect the mechanism and include the triangle frame, the triangle frame includes base support pole and two side support poles, base support pole and two the side support pole passes through adapter fixed connection, shovel tongue fixed mounting be in on the base support pole.

Further, the collecting net comprises a gradually-reduced net body, the head end opening is arranged at one end with a larger cross section on the net body, and the tail end opening is arranged at one end with a smaller cross section on the net body; a first nylon sleeve is fixedly arranged at the edge of the opening at the head end, an opening is arranged on the first nylon sleeve, and the triangular frame penetrates through the first nylon sleeve; the tail end opening is provided with an annular buckle, and the edge of the tail end opening is detachably and hermetically connected with the collecting cage through the annular buckle.

Furthermore, a cage opening is formed in the collecting cage, and the cage opening is matched with the tail end opening of the collecting net; still be equipped with a plurality of holes of permeating water on the collection cage, the hole of permeating water runs through the collection cage.

Further, the outer wall of the cage opening is further provided with a lock catch, and the annular buckle is pressed tightly by the lock catch.

Further, the base bracing piece and the tip of side support bar is equipped with the external screw thread, the tip of adapter is equipped with the internal thread, the base bracing piece and the side support bar respectively with adapter threaded connection.

Furthermore, two adapter between the side bracing piece with haulage rope fixed connection.

Furthermore, the bottom side supporting rod is a solid steel bar, and the side supporting rod is a hollow steel pipe.

Furthermore, the end of the shovel tongue, which faces away from the collecting net, is in a semi-elliptical shape, and the thickness of the shovel tongue is gradually reduced along the direction which faces away from the collecting net.

The utility model has the advantages that: the utility model provides a pair of large-scale mollusk collection device, the installation and the dismantlement of being convenient for can gather the great end of a dwelling mollusk of volume in the water bottom that different velocity of flow, substrate are complicated, at the in-process convenient to use of gathering, laborsaving, stability is good, be difficult for turning on one's side, gathers mollusk effectual. The concrete main points are as follows: (1) this collection device design scientific and reasonable, the net gape shape is triangle-shaped, has better structural stability, and the base bracing piece adopts solid rod iron, both sides limit bracing piece to adopt the steel pipe, and the base open end plus is established the shovel tongue, and the weight on base is greater than the side weight, can utilize self weight to sink underwater, even can not float along with the rivers at the faster water of velocity of flow yet, and prevent to turn on one's side. (2) The collecting device is only tied with a traction rope on the top end of the net opening to utilize water flow and ship power to drag slowly at the bottom of the water, the defect that the traditional triangular trawl net is light in weight is overcome, the three-end tether easily floats under the condition of larger water flow and is not easy to sink, and the collecting efficiency is high. (3) The collecting device is convenient to capture, time-saving, labor-saving and clean, and the collected benthonic mollusks can be taken out only by disassembling the collecting net and collecting the connection between the cages. (4) Each part of the collecting device is convenient to disassemble and assemble and convenient to carry.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the collecting mechanism of the present invention;

FIG. 3 is a schematic view of the collecting net of the present invention;

FIG. 4 is a schematic view of the collecting cage of the present invention;

FIG. 5 shows a first embodiment of the present invention in which a tongue is engaged with a collection mechanism;

fig. 6 shows a second embodiment of the present invention, in which the spatula and the collecting mechanism are matched.

In the drawings, the components represented by the respective reference numerals are listed below:

1. collect the net, 101, the dictyosome, 102, first nylon sleeve pipe, 103, second nylon sleeve pipe, 104, annular buckle, 2, collect the mechanism, 201, the base bracing piece, 2011, the external screw thread, 2012, the through-hole, 202, the side support pole, 203, the adapter, 2031, rings, 2032, the internal thread, 2033, the screw, 2034, the locating hole, 3, collect the cage, 301, the cage mouth, 302, the hole of permeating water, 303, the hasp, 4, the haulage rope, 5, the shovel tongue, 501, the bolt.

Detailed Description

The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.

The collecting device for large mollusks as shown in fig. 1 comprises a collecting net 1, wherein the collecting net 1 can be made of nylon or a flexible metal net. The two ends of the collecting net 1 are respectively provided with a head end opening and a tail end opening, the head end opening is used as an inlet end of the collected mollusk, and the tail end opening is used as an outlet end of the collected mollusk. A collecting mechanism 2 is arranged at an opening at the head end of the collecting net 1, and the collecting mechanism 2 is fixedly connected with the edge of the collecting net 1; the bottom of the collecting mechanism 2 is fixedly provided with a shovel tongue 5, one end of the shovel tongue 5 extends in the direction back to the collecting net 1 and is used for shoveling the mollusks into the collecting net 1 when the collecting device moves. The top end of the collecting mechanism 2 is also provided with a flexible hauling rope 4, and the hauling rope 4 is fixedly connected with the collecting mechanism 2 and used for dragging the collecting device to advance under water; the tail end opening of collecting net 1 is provided with collects cage 3, collect cage 3 with collect net 1 detachably sealing connection for collect the mollusk sample that will gather and collect cage 3 in, be convenient for follow-up mollusk sample of taking out.

As shown in fig. 2, the collecting mechanism 2 comprises a triangular frame, and in order to keep the collecting device balanced when the collecting device is towed under water to advance, an isosceles triangle or an equilateral triangle is preferably used. Triangular frame includes base bracing piece 201 and two side support bars 202, base bracing piece 201 and two side support bar 202 is respectively through two double fixed connection of adapter 203, shovel tongue 5 fixed mounting be in on the base bracing piece 201. Haulage rope 4 fixed mounting is at collection mechanism 2 tops to overcome this collection device and float the difficult drawback of sinking under the great condition of rivers.

As shown in fig. 3, the collecting net 1 includes a tapered net body 101, the head end opening is disposed at the end of the net body 101 with the larger cross section, and the tail end opening is disposed at the end of the net body 101 with the smaller cross section; the first nylon sleeve 102 is fixedly arranged at the edge of the opening at the head end, and the first nylon sleeve 102 can be sewn at the opening at the front end of the net body 101 for improving the mounting firmness. When the net body 101 made of nylon material is used, the opening at the head end of the net body 101 may be folded and sewn, and the first nylon sleeve 102 may be made of the material of the net body. A plurality of openings are formed in the first nylon sleeve 102, the triangular frame penetrates through the first nylon sleeve 102, and the adapter 203 is exposed at the opening of the first nylon sleeve 102, so that the triangular frame is convenient to disassemble and assemble; the tail end opening is provided with an annular buckle 104, and the edge of the tail end opening is detachably and hermetically connected with the collecting cage 3 through the annular buckle 104. As a further preferable scheme, a second nylon sleeve 103 may be further fixedly disposed at the tail end opening, and similarly, when the net body 101 made of nylon material is adopted, the tail end opening of the net body 101 may be folded and sewn, and the second nylon sleeve 103 is made of self material. The annular buckle 104 is arranged in the second nylon sleeve 103, the second nylon sleeve 103 is provided with an opening for exposing the locking part of the annular buckle 104, and when the annular buckle 104 needs to be locked or unlocked, the operation can be carried out at the opening of the second nylon sleeve 103. The annular snap 104 may be a bolt 501 fixed type or other type of removable reusable annular snap 104.

As shown in fig. 4, a cage body and an open cage opening 301 are arranged on the collecting cage 3, and the cage opening 301 is in butt joint fit with an opening at the tail end of the collecting net 1; still be equipped with a plurality of holes 302 of permeating water on collecting cage 3, it runs through to permeate water hole 302 collect cage 3 for the water in the mollusk sample that the filtering was collected. The tail end opening of the collecting net 1 is sleeved on the outer wall of the cage opening 301, then the annular buckle 104 is sleeved on the outer side of the collecting net 1 and locked with the annular buckle 104, and the collecting net 1 can be firmly and closely mounted on the collecting cage 3.

In order to further enhance the reliability of the installation of the collecting net 1 and the collecting cage 3, as a preferred scheme, at least two sets of latches 303 are further arranged on the outer wall of the cage opening 301, in this embodiment, four sets of latches 303 are preferably arranged on the outer wall of the cage opening 301 in a circumferential distribution, and when the latches 303 are fastened, the latches 303 compress the annular buckle 104, so as to further fix the tail end opening of the collecting net 1 on the cage opening 301. When a sample needs to be taken out, the collection net 1 and the collection cage 3 can be separated by only opening the lock catch 303 and detaching the lower annular buckle 104, so that the sample can be poured out of the collection cage 3. The latch 303 may be a push-type latch of the prior art.

As shown in fig. 2, the end portions of the bottom side support rod 201 and the side support rod 202 are both provided with external threads 2011, the end portion of the adapter 203 is provided with internal threads 2032, and the bottom side support rod 201 and the side support rod 202 are respectively in threaded connection with the adapter 203. In order to facilitate the assembly and disassembly of the bottom side support bar 201 and the threaded connection between the side support bar 202 and the adapter 203, the thread direction may be set reasonably, for example, the directions of the external threads 2011 at the two ends of the bottom plate support bar or at least one side support bar 202 are set to be opposite directions. In order to enhance the connection firmness of the collecting mechanism 2, further, the adapter 203, the bottom side support rod 201, and the side support rod 202 are respectively provided with a positioning hole 2034, and a screw 2033 is disposed in the positioning hole 2034 for further positioning and reinforcing.

As shown in fig. 2, the adapter 203 between the two side support rods 202 is fixedly connected to the pulling rope 4. Can be with haulage rope 4 snap-on this adapter 203, also can weld positioners such as rings 2031 on this adapter 203, tie up haulage rope 4 firmly on rings 2031 to prevent that collection device from floating and be difficult for sinking under the great condition of rivers.

In order to prevent the collection device from turning on one side when collecting samples and affecting the collection effect, the weight of the bottom side support rod 201 should be greater than that of any one side support rod 202, so as to ensure that the bottom side support rod 201 and the shovel tongue 5 are always located at the lowest part of the collection mechanism 2. Preferably, the bottom support rod 201 is made of a solid steel bar, and the side support rod 202 is made of a hollow steel tube.

As shown in fig. 2, the shovel tongue 5 is preferably made of a ferrous material to increase the self-weight and the wear resistance. The shovel tongue 5 dorsad the one end of collecting net 1 is half oval, as shown in fig. 5, shovel tongue 5 is along dorsad the direction thickness convergent of collecting net 1 obtains through the experiment, and the validity that sample was gathered can be improved to the shovel tongue 5 that so sets up. Fig. 5 shows one embodiment of the matching between the tongue 5 and the collection mechanism 2, the bottom side support rod 201 passes through the first nylon sleeve 102, the tongue 5 is disposed at the bottom of the bottom side support rod 201 and the first nylon sleeve 102, the bottom side support rod 201, the first nylon sleeve 102 and the tongue 5 are all provided with matching through holes 2012, and a bolt 501 penetrates through the through holes 2012 to fixedly mount the bottom side support rod 201 and the tongue 5 and tightly press the first nylon sleeve 102. On the basis of the embodiment of fig. 5, further improvement as shown in fig. 6 can be performed: the end, connected with the bottom edge support rod 201, of the shovel tongue 5 is bent, the bent end portion wraps the bottom edge support rod 201 and the first nylon sleeve 102, a through hole 2012 is formed in the bent end, the through hole 2012 corresponds to the through hole 2012 in the bottom edge support rod 201 and the first nylon sleeve 102, and then the bottom edge support rod 201, the first nylon sleeve 102 and the shovel tongue 5 are fixed by penetrating the through hole 2012 through a bolt 501. Due to the arrangement of the structure shown in fig. 6, the connection between the shovel tongue 5 and the bottom edge support rod 201 is firmer, and the service life of the collecting device can be prolonged.

The working principle is as follows:

the collection device of this embodiment can be dismantled when idle and accomodate, and occupation space is little, portable. When the bottom edge support rod 201 and the two side edge support rods 202 need to be used, the bottom edge support rod 201 and the two side edge support rods 202 penetrate through the corresponding positions of the first nylon sleeve 102 respectively, then the adapter 203 is installed and fixed through threads, then the bottom edge support rod 201 and the two side edge support rods 202 are confirmed to correspond to the positioning holes 2034 of the adapter 203, and screws are screwed into the positioning holes 2034; secondly, the shovel tongue 5 and the bottom edge support rod 201 are installed through a bolt 501 (if the shovel tongue 5 is of a bent structure at one end as shown in fig. 6, the shovel tongue 5 needs to be installed first, and then the adapter 203 needs to be installed); and then the annular buckle 104 penetrates through the second nylon sleeve 103, the locking part of the annular buckle 104 is exposed at the opening of the second nylon sleeve 103, the tail end opening of the collecting net 1 is sleeved on the outer wall of the cage opening 301 of the collecting cage 3, the locking part of the annular buckle 104 is locked, then the annular buckle 104 is locked and reinforced by using the lock catch 303 on the collecting cage 3, and finally the traction rope 4 is fixed on the adapter 203 at the top of the collecting mechanism 2, namely the collecting device is installed. When in use, the collecting device is naturally sunk into the water bottom, and the hauling rope 4 is hauled by a person or a ship to collect mollusk samples on the water bottom.

The large-scale mollusk collection device that this embodiment provided, the installation of being convenient for and dismantlement can gather the great benthonic mollusk of volume at the water bottom of different velocity of flow, substrate complicacy, and convenient to use, laborsaving at the in-process of gathering, stability is good, be difficult for turning on one's side, gathers the effectual of mollusk. The concrete main points are as follows: (1) this collection device design scientific and reasonable, the net gape shape is triangle-shaped, has better structural stability, and base bracing piece 201 adopts solid rod iron, both sides limit bracing piece 202 to adopt the steel pipe, and the base open end plus is established the shovel tongue 5, and the weight on base is greater than the side weight, can utilize self weight to sink underwater, even can not float along with the rivers at the faster water of velocity of flow yet, and prevent to turn on one's side. (2) The collecting device is only tied with a hauling rope 4 at the top end of the net mouth and slowly dragged at the bottom by utilizing water flow and ship power, the defect that the traditional triangular trawl net is light in weight, the three-end tying rope easily floats under the condition of large water flow and is difficult to sink is overcome, and the collecting efficiency is high. (3) The collecting device is convenient to capture, time-saving, labor-saving and clean, and the collected benthonic mollusks can be taken out only by disassembling the connection between the collecting net 1 and the collecting cage 3. (4) Each part of the collecting device is convenient to disassemble and assemble and convenient to carry.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. The large mollusk collecting device is characterized by comprising a collecting net (1), wherein both ends of the collecting net (1) are respectively provided with a head end opening and a tail end opening, the head end opening of the collecting net (1) is provided with a collecting mechanism (2), and the collecting mechanism (2) is fixedly connected with the edge of the collecting net (1); a shovel tongue (5) is fixedly arranged at the bottom of the collecting mechanism (2), one end of the shovel tongue (5) extends in a direction back to the collecting net (1), a traction rope (4) is further arranged on the collecting mechanism (2), and the traction rope (4) is fixedly connected with the collecting mechanism (2); the tail end opening of collecting net (1) is provided with collecting cage (3), collecting cage (3) with collect net (1) detachably sealing connection.

2. The large mollusk collecting device according to claim 1, wherein the collecting mechanism (2) comprises a triangular frame, the triangular frame comprises a bottom support rod (201) and two side support rods (202), the bottom support rod (201) and the two side support rods (202) are fixedly connected through an adapter (203), and the shovel tongue (5) is fixedly installed on the bottom support rod (201).

3. A mollusc collecting device according to claim 2, characterised in that the collecting net (1) comprises a tapered net body (101), the head end opening is arranged at the end of the net body (101) with the larger cross section, and the tail end opening is arranged at the end of the net body (101) with the smaller cross section; a first nylon sleeve (102) is fixedly arranged at the edge of the opening at the head end, an opening is arranged on the first nylon sleeve (102), and the triangular frame penetrates through the first nylon sleeve (102); the tail end opening is provided with an annular buckle (104), and the edge of the tail end opening is detachably connected with the collecting cage (3) in a sealing mode through the annular buckle (104).

4. A collecting device for large mollusks according to claim 3, characterised in that said collecting cage (3) is provided with a cage opening (301), said cage opening (301) being adapted to the opening at the end of said collecting net (1); still be equipped with a plurality of holes (302) of permeating water on collecting cage (3), it runs through to permeate water hole (302) collect cage (3).

5. A collecting device for large mollusks according to claim 4, characterised in that the outer wall of the cage mouth (301) is further provided with a lock catch (303), and the lock catch (303) presses the annular buckle (104).

6. The large mollusk collecting device according to claim 2, wherein the bottom leg (201) and the side leg (202) are provided with external threads (2011) at their ends, and the adapter (203) is provided with internal threads (2032) at its end, and the bottom leg (201) and the side leg (202) are respectively connected to the adapter (203) by threads.

7. A harvesting apparatus according to claim 2, wherein the adapter (203) between the two lateral support rods (202) is fixedly connected to the hauling cable (4).

8. A large mollusk collecting device in accordance with claim 2, characterised in that the bottom support rod (201) is a solid steel rod and the side support rods (202) are hollow steel tubes.

9. A mollusc collecting device according to claim 1, characterised in that the end of the spatula (5) facing away from the collecting net (1) is semi-elliptical and that the spatula (5) tapers in thickness in the direction facing away from the collecting net (1).