阅读说明：本技术 一种单船底拖网用海底底质保护型网板 (Seabed substrate protection type screen plate for single-ship bottom trawl ) 是由 张洪亮 李哲 王好学 李德伟 于 2019-09-04 设计创作，主要内容包括：本发明公开了一种单船底拖网用海底底质保护型网板,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单船底拖网用海底底质保护型网板。它包括主网板及自适应扩张装置,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连杆、位于主网板下方的支撑架及转动设置在支撑架上的触底滚轮,所述主网板位于两块支撑翼板之间,所述支撑翼板的上部通过铰接轴与主网板铰接相连,所述连杆的上端与对应的支撑翼板的下部铰接相连,连杆的下端均与支撑架的上部铰接相连。(The invention discloses a seabed bottom substance protection type screen plate for a single-ship bottom trawl, and aims to provide a seabed bottom substance protection type screen plate for a single-ship bottom trawl, which can effectively solve the problem that the seabed bottom substance is seriously damaged because the lower edge of the screen plate is scraped to the seabed in the operation process of the trawl in the prior art. It includes main otter board and self-adaptation expansion device, self-adaptation expansion device including control two support pterygoid lamina, with support pterygoid lamina one-to-one connecting rod, be located the support frame of main otter board below and rotate the gyro wheel that touches at the bottom of setting on the support frame, main otter board is located between two support pterygoid lamina, the upper portion of supporting the pterygoid lamina is passed through the articulated axle and is linked to each other with the main otter board is articulated, the upper end of connecting rod links to each other with the lower part of the support pterygoid lamina that corresponds is articulated, and the lower.)

1. A seabed bottom substance protection type screen plate for a single-ship bottom trawl is characterized by comprising a main screen plate and a self-adaptive expansion device, wherein the self-adaptive expansion device comprises a left supporting wing plate, a right supporting wing plate, connecting rods in one-to-one correspondence with the supporting wing plates, a supporting frame positioned below the main screen plate and bottom contact rollers rotatably arranged on the supporting frame;

in the process that the main network plate is gradually close to the seabed, after the bottom contact roller contacts the seabed, the bottom contact roller drives the support wing plate to rotate upwards through the support frame and the connecting rod to expand so as to buffer the downward impact of the main network plate.

2. The seabed sediment protective screen plate for the single-ship bottom trawl as claimed in claim 1, wherein the supporting frame comprises a vertical rod, a roller bracket sliding up and down along the vertical rod, and a bracket buffer spring sleeved on the vertical rod and located above the roller bracket, the lower ends of the connecting rods are hinged with the upper end of the vertical rod, and the bottoming roller is rotatably arranged on the roller bracket.

3. The seabed sediment protective otter board for the single-ship bottom trawl according to claim 1, wherein the supporting frame further comprises a baffle plate arranged at the upper part of the vertical rod and a limiting block arranged at the bottom of the vertical rod, a sliding sleeve which slides up and down along the vertical rod is arranged on the roller bracket, the bracket buffer spring is positioned between the baffle plate and the sliding sleeve, and the roller bracket is supported on the limiting block.

4. The seabed substrate protection type otter board for the single-ship bottom trawl according to claim 1, 2 or 3, wherein the left and right support wing plates are symmetrically distributed on two opposite sides of the main otter board.

5. The seabed sediment protective otter board for the single-ship bottom trawl according to claim 1, 2 or 3, wherein a plurality of guide wing plates extending forwards and backwards are arranged on the side surface of the main otter board.

6. The seabed substrate protection type otter board for the single-ship bottom trawl according to claim 5, wherein the flow guide wing plates are distributed at the upper part, the middle part and the lower part of the main otter board.

7. The seabed substrate protection type otter board for the single-ship bottom trawl according to claim 5, wherein flow guiding wing plates are arranged on two opposite side surfaces of the main otter board.

Technical Field

The invention relates to a trawl door, in particular to a seabed bottom protection type door for a trawl at the bottom of a single ship.

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 seabed bottom substance protection type screen plate for a 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 the seabed bottom substance.

The technical scheme of the invention is as follows:

a seabed bottom substance protection type screen plate for a single-ship bottom trawl comprises a main screen plate and a self-adaptive expansion device, wherein the self-adaptive expansion device comprises a left support wing plate, a right support wing plate, connecting rods in one-to-one correspondence with the support wing plates, a support frame positioned below the main screen plate and bottom contact rollers rotatably arranged on the support frame; in the process that the main network plate is gradually close to the seabed, after the bottom contact roller contacts the seabed, the bottom contact roller drives the support wing plate to rotate upwards through the support frame and the connecting rod to expand so as to buffer the downward impact of the main network plate.

Therefore, in the trawl operation process, when the main screen plate is gradually close to the seabed, the bottom contact roller firstly touches the bottom, and then the bottom contact roller drives the support wing plate to rotate upwards through the support frame and the connecting rod to expand so as to buffer the downward impact of the main screen plate, thereby reducing or even eliminating the impact of the main screen plate to the seabed direction, and reducing or even eliminating the scraping of the lower edge of the main screen plate to the seabed; on the other hand, after the bottom-touching roller touches the bottom, the bottom-touching roller rolls along the seabed, so that the seabed bottom substance is not seriously damaged; therefore, the submarine substrate protection type screen plate for the single-ship-bottom trawl 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, so that the submarine substrate is seriously damaged, and is favorable for protecting the submarine substrate.

Preferably, the support frame comprises a vertical rod, a roller support sliding up and down along the vertical rod and a support buffer spring sleeved on the vertical rod and positioned above the roller support, the lower end of the connecting rod is hinged to the upper end of the vertical rod, and the bottom contact roller is rotatably arranged on the roller support. Therefore, after the bottom contact roller contacts the bottom, the buffer spring can be used for buffering, the bottom contact roller is prevented from being in rigid contact with the seabed, and the seabed bottom substance can be protected.

Preferably, the support frame further comprises a baffle arranged on the upper portion of the upright rod and a limiting block arranged at the bottom of the upright rod, a sliding sleeve which slides up and down along the upright rod is arranged on the roller support, the support buffer spring is located between the baffle and the sliding sleeve, and the roller support is supported on the limiting block.

Preferably, the main net plate is internally provided with a hollow inner cavity, the buoyancy of the main net plate is greater 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. Therefore, the weight of the whole screen plate can be reduced, and the lower edge of the screen plate can be scraped to the seabed.

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

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

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

The invention has the beneficial effects that: in the trawl operation process, when the main net plate is gradually close to the seabed, the bottom contact roller firstly touches the bottom, and then the bottom contact roller drives the support wing plate to rotate upwards and expand through the support frame and the connecting rod 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; on the other hand, after the bottom-touching roller touches the bottom, the bottom-touching roller rolls along the seabed, so that the seabed bottom substance is not seriously damaged; therefore, the submarine substrate protection type screen plate for the single-ship-bottom trawl 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, so that the submarine substrate is seriously damaged, and is favorable for protecting the submarine substrate.

Drawings

Fig. 1 is a schematic view showing a structure of a seabed substrate protection type otter board for a single-ship bottom 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 expanding unit 2 supports pterygoid lamina 2.0, connecting rod 2.1, support frame 2.2, touches end gyro wheel 2.3, pole setting 2.4, gyro wheel support 2.5, baffle 2.6, stopper 2.7, slip cap 2.8, buffer spring 2.9.

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.