阅读说明：本技术 一种双弧面拖网网板 (Double-cambered surface trawl net plate ) 是由 臧迎亮 刘莉莉 唐伟尧 于 2020-04-15 设计创作，主要内容包括：本发明提供一种双弧面拖网网板。所述双弧面拖网网板包括：第一基板和第二基板；三个连接杆,三个所述连接杆的顶部和底部分别固定于所述第一基板的底部和所述第二基板的顶部；多个第一网板组件,多个所述第一网板组件分别设置于三个所述连接杆上且位于所述第一基板与所述第二基板之间。本发明提供的双弧面拖网网板具有第一调节组件和第二调节组件之间单独控制,第一调节组件通过传动结构可以同步带动上方的第二支撑板进行转动,限位组件保障了传动结构运行时的稳定性,通过设置有上下双弧形板的结构方便对网板整体进行控制,从而方便网板整体在水下位置的控制,能够根据使用的需求增加网板之间的距离,提高拖网使用的效果,结构简单,使用方便。(The invention provides a double-cambered surface trawl door. The double-cambered trawl door plate comprises: a first substrate and a second substrate; the top and the bottom of the three connecting rods are respectively fixed on the bottom of the first substrate and the top of the second substrate; the first screen plate assemblies are respectively arranged on the three connecting rods and are positioned between the first substrate and the second substrate. The double-arc trawl door provided by the invention has the advantages that the first adjusting component and the second adjusting component are independently controlled, the first adjusting component can synchronously drive the second supporting plate above the first adjusting component to rotate through the transmission structure, the limiting component ensures the stability of the transmission structure during operation, the whole trawl door can be conveniently controlled through the structure with the upper double-arc plate and the lower double-arc plate, so that the control of the whole trawl door at the underwater position is facilitated, the distance between the trawl doors can be increased according to the use requirement, the use effect of the trawl is improved, the structure is simple, and the use is convenient.)

1. A dual cambered trawl door comprising: first base plate, second base plate, three connecting rod, a plurality of first otter board subassemblies, a plurality of second otter board subassemblies, connecting plate, drive box, first adjusting part, second adjusting part, two spacing subassemblies, a plurality of supplementary rings, its characterized in that: the tops and the bottoms of the three connecting rods are respectively fixed to the bottom of the first substrate and the top of the second substrate; the first screen plate assemblies are respectively arranged on the three connecting rods and located between the first substrate and the second substrate, each first screen plate assembly comprises a first supporting plate, the bottom of each first supporting plate is fixedly connected with a first arc-shaped plate, and the bottom of each first arc-shaped plate is fixedly connected with a second supporting plate; the second screen plate assemblies are respectively arranged on the three connecting rods and are positioned below the first screen plate assemblies, each second screen plate assembly comprises a third supporting plate, the bottom of each third supporting plate is fixedly connected with a second arc-shaped plate, and the bottom of each second arc-shaped plate is fixedly connected with a fourth supporting plate; the connecting plates are fixed on the three connecting rods and are positioned between the first screen plate assemblies and the second screen plate assemblies; the driving box is fixed on the connecting plate; the first adjusting component is arranged at the output end of the driving box; the second adjusting component is arranged at the output end of the driving box and is positioned below the first adjusting component; the two limiting assemblies are arranged on the driving box; the auxiliary rings are all fixed on the three connecting rods.

2. The trawl door according to claim 1, wherein the first and second substrates are identical in structure and size, and three of the connecting bars are uniformly and parallel distributed between the first and second substrates.

3. The trawl door of claim 1, wherein the first supporting plate and the second supporting plate have the same size, and the first supporting plate and the second supporting plate are respectively provided with a first rotating hole adapted to the connecting rod, and the first supporting plate and the second supporting plate are respectively rotatably connected to the connecting rod through the first rotating hole.

4. The trawl door of claim 1, wherein the third support plate and the fourth support plate are respectively provided with a second rotation hole adapted to the connecting rod, and the third support plate and the fourth support plate are rotatably connected to the connecting rod through the second rotation hole.

5. The dual cambered trawl door according to claim 1, wherein the connecting plate is disposed at a vertically central position of three of the connecting rods, and a distance between the first door assembly and the connecting plate is the same as a distance between the second door assembly and the connecting plate.

6. The double-cambered trawl door plate according to claim 1, wherein the first adjusting component comprises an electric telescopic shaft, one end of the electric telescopic shaft is fixedly connected with a connecting block, and one side of the connecting block is fixedly connected with a linkage rod.

7. The double-cambered trawl door panel according to claim 6, wherein the linkage rod is an L type rod, and one end of the linkage rod far away from the connecting block is fixedly connected with a linkage plate, and the surface of the linkage plate and the surface of the connecting plate are parallel to each other.

8. The double-cambered trawl door plate according to claim 7, wherein the linkage plate is fixedly connected with a transmission shaft, the second supporting plate is provided with a transmission hole, and the inner surface of the transmission hole is in transmission connection with the surface of the transmission shaft.

9. The trawl door of claim 8, wherein the first and second adjusting members are identical in structure and symmetrical to a vertical center of the drive box, and the second adjusting member is fitted to the third support plate.

10. The trawl door of claim 7, wherein the position-limiting component comprises a sliding slot, the sliding slot is disposed on a side of the driving box close to the connecting plate, the sliding slot is a T-shaped groove, a sliding plate is slidably connected to the sliding slot, one side of the sliding plate is of a T-shaped structure and is matched with the sliding slot, and a side of the sliding plate away from the sliding slot is fixedly connected to one side of the linkage plate.

Technical Field

The invention relates to the technical field of trawl doors, in particular to a double-cambered surface trawl door.

Background

When trawling operation of a traditional fishing boat, a trawling mode that two boats are used for opening with enough horsepower in parallel and a fishing net is opened between the two boats is adopted, the energy consumption is high, therefore, a single trawling boat appears, in order to enable the single boat to advance and open the fishing net, a single trawling net plate for the boat is needed to be used, the single trawling net plate for the boat is arranged at two ends of the trawling net to advance in parallel, the effect of the trawling net for the two boats can be achieved, the single trawling net plate for the boat is used for connecting the fishing boat and a net tool, the effective expansion of the net sleeves and the net openings is ensured by utilizing the lateral expansion force generated in the underwater dragging process, and the fishing effect is achieved, therefore, the advantages and the disadvantages of the trawling net plate for the boat directly influence the fish harvesting.

In prior art, current otter board is when using, the size of distance between two otter boards need expand in order to increase the trawl, the in-process that the otter board expanded carries out, often need carry out the skew of great distance with two ships, it is huge to consume, the while operation degree of difficulty is big, make expansion between the otter board inconvenient, because the environment of seabed is complicated, highly uneven, when the otter board carries out the trawl, the otter board can be because low and make trawl and seabed take place to pull the phenomenon, cause the damage of trawl.

Therefore, there is a need to provide a trawl door with double arcs to solve the above problems.

Disclosure of Invention

The invention provides a double-cambered-surface trawl net plate, which solves the problem that the distance between two net plates is inconvenient to expand.

In order to solve the technical problem, the double-cambered surface trawl door provided by the invention comprises: a first substrate and a second substrate; the top and the bottom of the three connecting rods are respectively fixed on the bottom of the first substrate and the top of the second substrate; the first screen plate assemblies are respectively arranged on the three connecting rods and are positioned between the first substrate and the second substrate, each first screen plate assembly comprises a first supporting plate, the bottom of each first supporting plate is fixedly connected with a first arc-shaped plate, and the bottom of each first arc-shaped plate is fixedly connected with a second supporting plate; the second screen plate assemblies are respectively arranged on the three connecting rods and are positioned below the first screen plate assemblies, each second screen plate assembly comprises a third supporting plate, the bottom of each third supporting plate is fixedly connected with a second arc-shaped plate, and the bottom of each second arc-shaped plate is fixedly connected with a fourth supporting plate; the connecting plates are fixed on the three connecting rods and are positioned between the first screen plate assemblies and the second screen plate assemblies; the driving box is fixed on the connecting plate; the first adjusting assembly is arranged at the output end of the driving box; the second adjusting assembly is arranged at the output end of the driving box and is positioned below the first adjusting assembly; the two limiting assemblies are arranged on the driving box; and the auxiliary rings are all fixed on the three connecting rods.

Preferably, the first substrate and the second substrate have the same structure and size, and the three connecting rods are uniformly and parallelly distributed between the first substrate and the second substrate.

Preferably, the first supporting plate and the second supporting plate are the same in size, and first rotating holes matched with the connecting rods are formed in the first supporting plate and the second supporting plate respectively, and the first supporting plate and the second supporting plate are connected with the connecting rods in a rotating mode through the first rotating holes.

Preferably, the third support plate and the fourth support plate are both provided with second rotating holes matched with the connecting rods, and the third support plate and the fourth support plate are rotatably connected with the connecting rods through the second rotating holes.

Preferably, the connecting plates are arranged at vertical center positions of the three connecting rods, and the distance between the first net plate assembly and the connecting plates is the same as the distance between the second net plate assembly and the connecting plates.

Preferably, the first adjusting assembly comprises an electric telescopic shaft, one end of the electric telescopic shaft is fixedly connected with a connecting block, and one side of the connecting block is fixedly connected with a linkage rod.

Preferably, the linkage rod is an L-shaped rod, one end, far away from the connecting block, of the linkage rod is fixedly connected with a linkage plate, and the surface of the linkage plate is parallel to the surface of the connecting plate.

Preferably, a transmission shaft is fixedly connected to the linkage plate, a transmission hole is formed in the second supporting plate, and the inner surface of the transmission hole is in transmission connection with the surface of the transmission shaft.

Preferably, the first adjusting assembly and the second adjusting assembly have the same structure and are symmetrical to the vertical center of the driving box, and the second adjusting assembly is matched with the third supporting plate.

Preferably, the limiting assembly comprises a sliding groove, the sliding groove is formed in one side, close to the connecting plate, of the driving box, the sliding groove is a T-shaped groove, a sliding plate is connected to the sliding groove in a sliding mode, one side of the sliding plate is of a T-shaped structure and matched with the sliding groove, and one side, far away from the sliding groove, of the sliding plate is fixedly connected with one side of the linkage plate.

Compared with the related art, the double-cambered surface trawl door plate provided by the invention has the following beneficial effects:

the invention provides a double-cambered surface trawl door, three groups of first door components and three groups of second door components are distributed up and down symmetrically, a driving box is arranged on a connecting plate and is positioned at the central position between the first door components and the second door components, a first adjusting component arranged on the driving box is in transmission connection with a second supporting plate, a second adjusting component is in transmission connection with a third supporting plate, the first adjusting component and the second adjusting component are controlled independently, the first adjusting component can synchronously drive the second supporting plate above the first adjusting component to rotate through a transmission structure, a limiting component ensures the stability of the transmission structure during operation, the integral control of the door is facilitated through a structure provided with an upper cambered plate and a lower plate, the integral control of the door at the underwater position is facilitated, the distance between the doors can be increased according to the use requirement, the use effect of the trawl is improved, the structure is simple, and the use is convenient.

Drawings

FIG. 1 is a schematic structural view of a preferred embodiment of a dual cambered trawl door in accordance with the present invention;

FIG. 2 is an enlarged view of portion A of FIG. 1;

FIG. 3 is a schematic structural view of portions of the first and second adjustment assemblies shown in FIG. 2;

FIG. 4 is an enlarged view of the portion B shown in FIG. 3;

fig. 5 is a schematic structural view of a portion of the spacing assembly shown in fig. 3.

Reference numbers in the figures: 1. the first base plate, 2, the second base plate, 3, the connecting rod, 4, first otter board subassembly, 41, first backup pad, 42, first arc, 43, the second backup pad, 5, the second otter board subassembly, 51, the third backup pad, 52, the second arc, 53, the fourth backup pad, 6, the connecting plate, 7, the drive box, 8, first adjusting part, 81, electronic telescopic shaft, 82, the connecting block, 83, the gangbar, 84, the gangbar, 85, the transmission shaft, 86, the drive hole, 9, the second adjusting part, 10, spacing subassembly, 101, the spout, 102, the sliding plate, 11, the auxiliary ring.

Detailed Description

The invention is further described with reference to the following figures and embodiments.

Referring to fig. 1, fig. 2, fig. 3, fig. 4 and fig. 5, wherein fig. 1 is a schematic structural view of a dual cambered trawl door according to a preferred embodiment of the present invention; FIG. 2 is an enlarged view of portion A of FIG. 1; FIG. 3 is a schematic structural view of portions of the first and second adjustment assemblies shown in FIG. 2; FIG. 4 is an enlarged view of the portion B shown in FIG. 3; fig. 5 is a schematic structural view of a portion of the spacing assembly shown in fig. 3. A dual cambered trawl door comprising: a first substrate 1 and a second substrate 2; the top and the bottom of the three connecting rods 3 are respectively fixed on the bottom of the first base plate 1 and the top of the second base plate 2; a plurality of first screen plate assemblies 4, the plurality of first screen plate assemblies 4 being respectively disposed on the three connecting rods 3 and located between the first substrate 1 and the second substrate 2, the first screen plate assemblies 4 including first supporting plates 41, the bottom of the first supporting plates 41 being fixedly connected with first arc-shaped plates 42, the bottom of the first arc-shaped plates 42 being fixedly connected with second supporting plates 43; the second screen plate assemblies 5 are respectively arranged on the three connecting rods 3 and are positioned below the first screen plate assembly 4, each second screen plate assembly 5 comprises a third supporting plate 51, the bottom of each third supporting plate 51 is fixedly connected with a second arc-shaped plate 52, and the bottom of each second arc-shaped plate 52 is fixedly connected with a fourth supporting plate 53; a connecting plate 6, wherein the connecting plate 6 is fixed on the three connecting rods 3 and is positioned between the plurality of first net plate assemblies 4 and the plurality of second net plate assemblies 5; the driving box 7, the said driving box 7 is fixed on said tie plate 6; the first adjusting assembly 8 is arranged at the output end of the driving box 7, and the first adjusting assembly 8 is arranged at the output end of the driving box 7; the second adjusting component 9 is arranged at the output end of the driving box 7, and the second adjusting component 9 is positioned below the first adjusting component 8; the two limiting assemblies 10 are arranged on the driving box 7, and the two limiting assemblies 10 are arranged on the driving box 7; a plurality of auxiliary rings 11, the plurality of auxiliary rings 11 are all fixed on the three connecting rods 3, the first arc-shaped plate 42 and the second arc-shaped plate 52 have the same structure, and the first arc-shaped plate 42 and the second arc-shaped plate 52 are not in contact with the connecting rods 3, the first arc-shaped plate 42 rotates around the connecting rods 3 through the first supporting plate 41 and the second supporting plate 43, the second arc-shaped plate 52 rotates around the connecting rods 3 through the third supporting plate 51 and the fourth supporting plate 53, one side of the first substrate 1 is of an arc-shaped structure, and the left side of the first substrate 1 is smaller than the right side of the first substrate 1, the first substrate 1 and the second substrate 2 play a main supporting role, the first substrate 1 and the second substrate 2 are fixedly connected through the three connecting rods 3, the three connecting rods 3 are uniformly distributed between the first substrate 1 and the second substrate 2, a group of first screen plate assemblies 4 and a group of second screen plate assemblies 5 are arranged on the two connecting rods 3, three groups of first screen plate assemblies 4 are arranged above the connecting plate 6 and on the three connecting rods 3, three groups of second screen plate assemblies 5 are arranged below the connecting plate 6 and on the three connecting rods 3, the three groups of first screen plate assemblies 4 and the three groups of second screen plate assemblies 5 are distributed in an up-and-down symmetrical manner, the driving box 7 is arranged on the connecting plate 6, the driving box 7 is arranged at the central position between the first screen plate assemblies 4 and the second screen plate assemblies 5, a first adjusting assembly 8 arranged on the driving box 7 is in transmission connection with a second supporting plate 43, a second adjusting assembly 9 is in transmission connection with a third supporting plate 51, the first adjusting assembly 8 and the second adjusting assembly 9 are controlled independently, the first adjusting assembly 8 can synchronously drive the second supporting plate 43 above to rotate through a transmission structure, when the three second supporting plates 43 above are in an initial state, the three first arc plates 42 are of a close-fitting and abutting structure, the second supporting plate 43 rotates around the connecting rod 3 under the driving of the first adjusting component 8, when the three second supporting plates 43 synchronously rotate, the first arc plates 42 are driven to synchronously rotate, the three corresponding first arc plates 42 synchronously rotate, gaps among the three first arc plates 42 are gradually increased, so that the flow between the three first arc plates 42 is increased, the rotation principle of the second arc plates 52 is the same as that of the first arc plates 42, the first arc plates 42 and the second arc plates 52 are separately controlled independently, the first arc plates 42 and the second arc plates 52 can synchronously rotate, the rotation of the first arc plates 42 or the rotation of the second arc plates 52 can be separately controlled, when the first arc plates 42 and the second arc plates 52 are in a closed state, when the trawl door moves underwater, the trawl door integrally deviates to one side far away from the arc-shaped surface, when the first electric telescopic shaft 81 contracts and the second electric telescopic shaft 82 is in a static state, the first electric telescopic shaft 81 drives the connecting block 82 to synchronously move to one side close to the driving box 7, the connecting block 82 drives the linkage rod 83 to synchronously move, the linkage rod 83 drives the linkage plate 84 to synchronously move, the linkage plate 84 drives the transmission shaft 85 to synchronously move, the transmission shaft 85 moves in the transmission hole 86 on the second supporting plate 43, when the transmission shaft 85 moves, the second supporting plate 43 is driven to rotate by the transmission structure of the transmission hole 86, the linkage plate 84 is provided with three transmission shafts 85 in total, the three transmission shafts 85 synchronously drive the three second supporting plates 43 above to rotate through the three corresponding transmission holes 86, the three second supporting plates 43 synchronously drive the three corresponding first arc-shaped plates 42 to rotate and adjust, and the gaps between the three first arc-shaped plates 42 are increased, the lower three corresponding second arc-shaped plates 52 are in a closed state, at the moment, the whole screen plate moves and is adjusted upwards, when the second arc-shaped plates 52 are opened, and the first arc-shaped plates 42 are in a closed state, the whole screen plate is adjusted downwards in the moving process, when the first arc-shaped plates 42 and the second arc-shaped plates 52 are synchronously opened, the gap between the first arc-shaped plates 42 and the gap between the second arc-shaped plates 52 are synchronously increased, and along with the gradual change of the angles of the first arc-shaped plates 42 and the second arc-shaped plates 52, the first arc-shaped plates 42 and the second arc-shaped plates 52 are gradually reduced under the influence of the arc, so that the whole screen plate can stably move in one direction, the whole screen plate is conveniently controlled through the structure provided with the upper and lower double arc-shaped plates, and the control of the whole screen plate at the underwater position is convenient, can increase the distance between the otter board according to the demand that uses, improve the effect that the trawl used, moreover, the steam generator is simple in structure, high durability and convenient use, the inside of drive box 7 is provided with two electric telescopic handle, two electric telescopic handle's output respectively with first adjusting part 8 and second adjusting part 9 fixed connection, so that to first adjusting part 8 and second adjusting part 9's activity regulation, supplementary ring 11 plays spacing effect to first otter board subassembly 4 and second otter board subassembly 5, stability when guaranteeing first otter board subassembly 4 and second otter board subassembly 5 and rotating, stability when spacing subassembly 10 has ensured the transmission structure operation, guarantee first arc 42 and second arc 52 rotate the synchronism and the stability of regulation.

The first substrate 1 and the second substrate 2 have the same structure and size, and the three connecting rods 3 are uniformly and parallelly distributed between the first substrate 1 and the second substrate 2.

The first support plate 41 and the second support plate 43 have the same size, and the first support plate 41 and the second support plate 43 are provided with first rotating holes matched with the connecting rods 3, and the first support plate 41 and the second support plate 43 are connected with the connecting rods 3 in a rotating manner through the first rotating holes.

Second rotating holes matched with the connecting rods 3 are formed in the third supporting plate 51 and the fourth supporting plate 53, and the third supporting plate 51 and the fourth supporting plate 53 are rotatably connected with the connecting rods 3 through the second rotating holes.

The connecting plate 6 is arranged at the vertical center position of the three connecting rods 3, and the distance between the first net plate assembly 4 and the connecting plate 6 is the same as the distance between the second net plate assembly 5 and the connecting plate 6.

The first adjusting assembly 18 comprises an electric telescopic shaft 81, one end of the electric telescopic shaft 81 is fixedly connected with a connecting block 82, and one side of the connecting block 82 is fixedly connected with a linkage rod 83.

The linkage rod 83 is an L-shaped rod, one end, far away from the connecting block 82, of the linkage rod 83 is fixedly connected with a linkage plate 84, and the surface of the linkage plate 84 is parallel to the surface of the connecting plate 6.

Fixedly connected with transmission shaft 85 on linkage plate 84, transmission hole 86 has been seted up on second backup pad 43, the internal surface of transmission hole 86 with transmission shaft 85's surface transmission is connected, mechanical seal between drive box 7 and the electric telescopic shaft 81, guarantee that electric telescopic shaft 81 can freely stretch out and draw back the inside of drive box 7 can not intake, control switch and power on drive box 7 passes through connecting wire and boats and ships are connected simultaneously, through control switch control drive box 7 inside electric telescopic handle's the affirmation and close on boats and ships, electric telescopic handle's output and electric telescopic shaft 81's output fixed connection to conveniently control electric telescopic shaft 81 concertina movement.

The first adjusting component 8 and the second adjusting component 9 have the same structure and are symmetrical to the vertical center of the driving box 7, the second adjusting component 9 is matched with the third supporting plate 51, the adjusting structures on the first adjusting component 8 and the second adjusting component 9 are the same, and the second adjusting component 9 is adjusted corresponding to the rotation of the second screen plate component 5.

The limiting assembly 10 comprises a sliding groove 101, the sliding groove 101 is arranged on one side, close to the connecting plate 6, of the driving box 7, the sliding groove 101 is a T-shaped groove, a sliding plate 102 is connected to the sliding groove 101 in a sliding manner, one side of the sliding plate 102 is of a T-shaped structure and is matched with the sliding groove 101, one side, far away from the sliding groove 101, of the sliding plate 102 is fixedly connected with one side of the linkage plate 84, the linkage plate 84 can drive the sliding plate 102 to move synchronously while moving and adjusting, and the sliding plate 102 can stably move horizontally under the action of the sliding groove 101.

The working principle of the double-cambered surface trawl door provided by the invention is as follows:

s1, when the first arc-shaped plate 42 and the second arc-shaped plate 52 are both in a closed state, the trawl door integrally deviates to one side far away from the arc-shaped surface when moving underwater;

s2, when the first electric telescopic shaft 81 contracts and the second electric telescopic shaft 82 is in a static state, the first electric telescopic shaft 81 drives the connecting block 82 to synchronously move towards one side close to the driving box 7, the connecting block 82 drives the linkage rod 83 to synchronously move, and the linkage rod 83 drives the linkage plate 84 to synchronously move;

s3, the linkage plate 84 drives the transmission shafts 85 to move synchronously, the transmission shafts 85 move inside the transmission holes 86 on the second support plate 43, when the transmission shafts 85 move, the transmission structures of the transmission holes 86 drive the second support plate 43 to rotate, and the three transmission shafts 85 synchronously drive the three second support plates 43 above the transmission shafts to rotate through the three corresponding transmission holes 86;

s4 the three second supporting plates 43 synchronously drive the three corresponding first arc-shaped plates 42 to rotate and adjust, gaps between the three first arc-shaped plates 42 increase, the lower three corresponding second arc-shaped plates 52 are in a closed state, and at this time, the entire screen plate moves and adjusts upward;

s5 when the second arc-shaped plate 52 is opened and the first arc-shaped plate 42 is in a closed state, the whole screen plate is adjusted downwards in the moving process;

s6 when the first arc plate 42 and the second arc plate 52 are opened synchronously, the gap between the first arc plate 42 and the gap between the second arc plate 52 are increased synchronously, and along with the gradual change of the angles of the first arc plate 42 and the second arc plate 52, the first arc plate 42 and the second arc plate 52 are gradually reduced under the influence of arc, so that the net plate can be moved in one direction stably, the whole net plate is controlled conveniently through the structure provided with the upper and lower double arc plates, the whole position of the net plate under water is controlled conveniently, the distance between the net plates can be increased according to the use requirement, the use effect of the trawl is improved, the structure is simple, and the use is convenient.

Compared with the related art, the double-cambered surface trawl door plate provided by the invention has the following beneficial effects:

three groups of first screen plate components 4 and three groups of second screen plate components 5 are distributed in an up-down symmetrical mode, a driving box 7 is installed on a connecting plate 6, the driving box 7 is located at the center position between the first screen plate components 4 and the second screen plate components 5, a first adjusting component 8 and a second supporting plate 43 which are arranged on the driving box 7 are in transmission connection, a second adjusting component 9 and a third supporting plate 51 are in transmission connection, the first adjusting component 8 and the second adjusting component 9 are independently controlled, the first adjusting component 8 can synchronously drive the second supporting plate 43 above to rotate through a transmission structure, a limiting component 10 ensures the stability of the transmission structure during operation, the whole screen plate is conveniently controlled through a structure provided with an upper arc-shaped plate and a lower arc-shaped plate, the control of the whole screen plate at the underwater position is convenient, the distance between the screen plates can be increased according to the use requirements, the use effect of the trawl is improved, the structure is simple, and the use is convenient.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.