阅读说明：本技术 一种悬浮式单船底拖网用网板 (Suspended screen plate for single-ship-bottom trawl ) 是由 张洪亮 孟祥磊 刘连为 朱文斌 于 2019-09-04 设计创作，主要内容包括：本发明公开了一种悬浮式单船底拖网用网板,旨在提供一种能够有效减小现有技术中的拖网在作业的过程中,网板的下缘刮到海底,严重破坏海底底质的问题的悬浮式单船底拖网用网板。它包括主网板及自适应扩张装置,所述主网板内具有空心内腔,主网板的浮力大于主网板的重力,主网板的浮力小于主网板与自适应扩张装置的重力之和；所述自适应扩张装置包括左右两块支撑翼板、与支撑翼板一一对应的弹性连接元件、与支撑翼板一一对应的连杆、位于主网板下方的铰接座及通过连接绳悬挂在铰接座下方的配重球,支撑翼板的上部通过铰接轴与主网板铰接相连,连杆的上端与对应的支撑翼板的下部铰接相连,连杆的下端均与铰接座铰接相连。(The invention discloses a screen plate for a suspended single-ship bottom trawl, and aims to provide a screen plate for a suspended single-ship bottom trawl, which can effectively solve the problem that the lower edge of the screen plate is scraped to the seabed in the operation process of the trawl in the prior art, so that the seabed bottom is seriously damaged. The self-adaptive expansion device comprises a main screen plate and a self-adaptive expansion device, wherein a hollow inner cavity is formed in the main screen plate, the buoyancy of the main screen plate is greater than the gravity of the main screen plate, and the buoyancy of the main screen plate is less than the sum of the gravity of the main screen plate and the gravity of the self-adaptive expansion device; the self-adaptive expansion device comprises a left support wing plate, a right support wing plate, elastic connecting elements in one-to-one correspondence with the support wing plates, connecting rods in one-to-one correspondence with the support wing plates, a hinge seat positioned below the main network plate and a counterweight ball hung below the hinge seat through a connecting rope, the upper portions of the support wing plates are hinged and connected with the main network plate through hinge shafts, the upper ends of the connecting rods are hinged and connected with the lower portions of the corresponding support wing plates, and the lower ends of the connecting rods are hinged and connected with the hinge seat.)

1. A suspended otter board for a single-ship bottom trawl is characterized by comprising a main otter board and a self-adaptive expansion device, wherein a hollow inner cavity is formed in the main otter board, the buoyancy of the main otter board is greater than the gravity of the main otter board, and the buoyancy of the main otter board is less than the sum of the gravity of the main otter board and the gravity of the self-adaptive expansion device;

the self-adaptive expansion device comprises a left support wing plate, a right support wing plate, elastic connecting elements, connecting rods, a hinge seat and a counterweight ball, wherein the elastic connecting elements are in one-to-one correspondence with the support wing plates, the connecting rods are in one-to-one correspondence with the support wing plates, the hinge seat is positioned below the main web plate, the counterweight ball is hung below the hinge seat through a connecting rope, the main web plate is positioned between the two support wing plates, the upper parts of the support wing plates are hinged and connected with the main web plate through hinge shafts, the upper ends of the connecting rods are hinged and connected with the lower parts of the corresponding support wing plates, the lower ends of the connecting rods are hinged and connected with the hinge seat, the upper ends of the elastic connecting elements are connected with the main web plate, the lower;

in the process that the main net plate gradually approaches to the seabed, after the counterweight ball contacts the seabed, the elastic connecting element drives the corresponding support wing plate to rotate upwards and expand so as to buffer the downward impact of the main net plate.

2. The net plate for the suspended trawl at the bottom of the single ship as claimed in claim 1, wherein a plurality of guide wing plates extending forward and backward are provided on a side surface of the main net plate.

3. The otter board for a suspended single-ship bottom trawl according to claim 1, wherein the guide wing plates are provided on both opposite side surfaces of the main otter board.

4. A net plate for a suspended single-bottom trawl according to claim 2 or 3, wherein the guide wing plates are distributed at the upper, middle and lower portions of the main net plate.

5. A net plate for a suspended trawl at the bottom of a single ship according to claim 1, 2 or 3, wherein said left and right support wing plates are symmetrically arranged at opposite sides of the main net plate.

6. A net plate for a suspended single-bottom trawl according to claim 1, 2 or 3, wherein said elastic connecting member is a tension spring or a rubber rib.

7. A net plate for a suspended trawl at the bottom of a single ship according to claim 1, 2 or 3, wherein the buoyancy of said main net plate is greater than the sum of the gravity of said main net plate, said supporting wing plates, said connecting rods and said elastic connecting members.

8. The net plate for the suspended single-ship bottom trawl according to claim 1, 2 or 3, wherein the side surface of the support wing plate is provided with a connecting ring, and the lower end of the elastic connecting element is connected with the connecting ring on the corresponding support wing plate.

Technical Field

The invention relates to a trawl door, in particular to a suspended single-ship bottom trawl door.

Background

The trawl at the bottom of a single ship is also called single towing, and adopts a ship for towing, the floater and the sinker on the trawl provide vertical expansion for the trawl, and the two net plates provide horizontal expansion for the trawl. The trawl board of single ship bottom has many types, such as rectangle, ellipse, vertical curved surface type, complex wing type otter board, etc., but the otter board of trawl is generally heavier at present, in the course of trawl operation, often appear the lower edge of otter board scrape the seabed, produce more serious destruction to the bottom matter of seabed.

Disclosure of Invention

The invention aims to provide a screen plate for a suspended single-ship-bottom trawl, which can effectively solve the problem that the lower edge of the screen plate scrapes the seabed in the operation process of the trawl in the prior art and seriously damages seabed sediments.

The technical scheme of the invention is as follows:

a mesh plate for a suspended single-ship bottom trawl comprises a main mesh plate and a self-adaptive expansion device, wherein a hollow inner cavity is formed in the main mesh plate, the buoyancy of the main mesh plate is greater than the gravity of the main mesh plate, and the buoyancy of the main mesh plate is smaller than the sum of the gravity of the main mesh plate and the gravity of the self-adaptive expansion device; the self-adaptive expansion device comprises a left support wing plate, a right support wing plate, elastic connecting elements, connecting rods, a hinge seat and a counterweight ball, wherein the elastic connecting elements are in one-to-one correspondence with the support wing plates, the connecting rods are in one-to-one correspondence with the support wing plates, the hinge seat is positioned below the main web plate, the counterweight ball is hung below the hinge seat through a connecting rope, the main web plate is positioned between the two support wing plates, the upper parts of the support wing plates are hinged and connected with the main web plate through hinge shafts, the upper ends of the connecting rods are hinged and connected with the lower parts of the corresponding support wing plates, the lower ends of the connecting rods are hinged and connected with the hinge seat, the upper ends of the elastic connecting elements are connected with the main web plate, the lower; in the process that the main net plate gradually approaches to the seabed, after the counterweight ball contacts the seabed, the elastic connecting element drives the corresponding support wing plate to rotate upwards and expand so as to buffer the downward impact of the main net plate.

Therefore, in the trawl operation process, when the main net plate is gradually close to the seabed, the counterweight ball firstly touches the bottom, then, because the gravity of the counterweight ball is supported on the seabed, at the moment, the tension of the elastic connecting element acting on the support wing plate overcomes the gravity of the support wing plate, drives the corresponding support wing plate to rotate upwards and expand so as to buffer the downward impact of the main net plate, thereby reducing or even eliminating the impact of the main net plate to the seabed direction, and reducing or even eliminating the scraping of the lower edge of the main net plate to the seabed; meanwhile, as the counterweight ball is spherical, the counterweight ball drags or rolls along the seabed, and can not seriously damage seabed bottom materials; therefore, the mesh plate for the suspended single-ship-bottom trawl can effectively solve the problem that the lower edge of the mesh plate scrapes the seabed in the operation process of the trawl in the prior art to seriously damage the seabed substrate, and is favorable for protecting the seabed substrate. On the other hand, the buoyancy of the main net plate is larger than the gravity of the main net plate, and the buoyancy of the main net plate is smaller than the sum of the gravity of the main net plate and the gravity of the self-adaptive expansion device, so that the weight of the whole net plate can be reduced under the condition that the two net plates do not influence the horizontal expansion force provided by the trawl, and the lower edge of the net plate can be favorably reduced to scrape the seabed.

Preferably, the side surface of the main net plate is provided with a plurality of guide wing plates extending forwards and backwards.

Preferably, the two opposite side surfaces of the main net plate are provided with the flow guide wing plates.

Preferably, the guide wing plates are distributed at the upper part, the middle part and the lower part of the main net plate.

Preferably, the left and right support wing plates are symmetrically distributed on two opposite sides of the main net plate.

Preferably, the elastic connection element is a tension spring or a rubber band.

Preferably, the buoyancy of the main net plate is greater than the sum of the gravity of the main net plate, the support wing plates, the connecting rods and the elastic connecting elements. So, main otter board will be through counter weight ball and connection rope suspension in aqueous, is favorable to further reducing the lower edge of otter board and scrapes the seabed.

Preferably, the side surface of the support wing plate is provided with a connecting ring, and the lower end of the elastic connecting element is connected with the connecting ring on the corresponding support wing plate.

The invention has the beneficial effects that: therefore, in the trawl operation process, when the main net plate is gradually close to the seabed, the counterweight ball firstly touches the bottom, then, because the gravity of the counterweight ball is supported on the seabed, at the moment, the tension of the elastic connecting element acting on the support wing plate overcomes the gravity of the support wing plate, drives the corresponding support wing plate to rotate upwards and expand so as to buffer the downward impact of the main net plate, thereby reducing or even eliminating the impact of the main net plate to the seabed direction, and reducing or even eliminating the scraping of the lower edge of the main net plate to the seabed; meanwhile, as the counterweight ball is spherical, the counterweight ball drags or rolls along the seabed, and can not seriously damage seabed bottom materials; therefore, the mesh plate for the suspended single-ship-bottom trawl can effectively solve the problem that the lower edge of the mesh plate scrapes the seabed in the operation process of the trawl in the prior art to seriously damage the seabed substrate, and is favorable for protecting the seabed substrate. On the other hand, the buoyancy of the main net plate is larger than the gravity of the main net plate, and the buoyancy of the main net plate is smaller than the sum of the gravity of the main net plate and the gravity of the self-adaptive expansion device, so that the weight of the whole net plate can be reduced under the condition that the two net plates do not influence the horizontal expansion force provided by the trawl, and the lower edge of the net plate can be favorably reduced to scrape the seabed.

Drawings

Fig. 1 is a schematic view showing a structure of a net plate for a suspended single-hull trawl according to the present invention.

Fig. 2 is a schematic cross-sectional view taken along line a-a in fig. 1.

In the figure:

the water-saving device comprises a main screen plate 1, a flow guide wing plate 1.1 and a hollow inner cavity 1.2;

self-adaptation extension fixture 2, support pterygoid lamina 2.0, connecting rod 2.1, articulated seat 2.2, connect rope 2.3, counter weight ball 2.4, elastic connection element 2.5.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention are clearly explained and illustrated below with reference to the accompanying drawings, but the following embodiments are only preferred embodiments of the present invention, and not all embodiments. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative effort belong to the protection scope of the present invention.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present scheme, and are not construed as limiting the scheme of the present invention.

These and other aspects of embodiments of the invention will be apparent with reference to the following description and attached drawings. In the description and drawings, particular embodiments of the invention have been disclosed in detail as being indicative of some of the ways in which the principles of the embodiments of the invention may be practiced, but it is understood that the scope of the embodiments of the invention is not limited thereby. On the contrary, the embodiments of the invention include all changes, modifications and equivalents coming within the spirit and terms of the claims appended hereto.

In the description of the present invention, it is to be understood that the terms "thickness", "upper", "lower", "horizontal", "top", "bottom", "inner", "outer", "circumferential", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., and "several" means one or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral connections, either mechanical or electrical, or communicating with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.