Bottom trawl device

Abstract

The invention relates to the technical field of marine fishing gear, the end of one side of a bottom supporting rod is rotatably connected with a first side supporting rod, the end of the other side of the bottom supporting rod is rotatably connected with a second side supporting rod, and the two ends of the bottom supporting rod and the ends of the first side supporting rod and the second side supporting rod are fixedly connected with pull ropes; the length of the extending positions of the first side supporting rod and the second side supporting rod is conveniently adjusted by utilizing the rotation adjusting function of the connecting position of the bottom supporting rod, the first side supporting rod and the second side supporting rod and combining the telescopic limiting function of the connecting sleeve, the telescopic supporting rod, the adjusting bayonet and the fastening bolt; the extending parts of the first side supporting rod and the second side supporting rod can be conveniently bent, so that a traditional triangular structure among the bottom supporting rod, the first side supporting rod and the second side supporting rod is converted into a square structure, deformation adjustment and use can be conveniently carried out according to actual requirements, the use range of the bottom trawl net is widened, and the capturing efficiency of the bottom trawl net is improved.

Description

Technical Field

[0001] The invention relates to the technical field of marine fishing gear, in particular to a bottom trawl device. Background Art

[0002] As one of the indispensable key equipment in marine fishery operations, the working principle of ship bottom trawl is to drag the trawl net on the seabed through the hull, and in the specific fishing operation, the fishing boat drags an open net that keeps in contact with the seabed to catch fish and other aquatic economic animals on the seabed. The net is usually composed of a net body, a net plate and other parts. The net body is the main part of the net, which is used to wrap and collect fish, and the net plate plays the role of expanding the net mouth and keeping the net open; Traditional bottom trawls are generally fixed structures, and their presentation form cannot be deformed and adjusted according to actual capture needs, which limits the scope of use of the bottom trawls and affects the efficiency of actual fish capture. At the same time, after the fixed bottom trawls are used, their joints are mostly fixed welded structures, which makes the bottom trawls occupy a large space when idle, also affecting the difficulty of their actual transportation. Summary of the invention

[0003] 1. Technical issues to be resolved In view of the deficiencies in the prior art, the present invention provides a bottom trawl device, which solves the problem that traditional bottom trawls are generally fixed structures, and their presentation form cannot be deformed and adjusted for use according to actual catching needs, resulting in a limited scope of use of the bottom trawl, affecting the efficiency of actual fish catching. At the same time, after the fixed bottom trawl is used, its connecting parts are mostly fixed welded structures, so the bottom trawl will occupy a large space when idle, which also affects the difficulty of its actual transportation.

[0004] (II) Technical solution To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a bottom trawl device, comprising a bottom support rod, one end of the bottom support rod is rotatably connected to a first side support rod, and the other end of the bottom support rod is rotatably connected to a second side support rod, both ends of the bottom support rod and the ends of the first side support rod and the second side support rod are fixedly connected with a pull rope, both ends of the bottom support rod and the tops of the first side support rod and the second side support rod are tied with a net rope on one side of the pull rope, and a trawl net is tied to the net rope through a braided rope; The two side ends of the bottom support rod are fixedly connected with the end connecting rods, and one side end of the first side support rod and the second side support rod is rotatably connected with the end connecting rod through the bottom connecting swivel seat, and the other side ends of the first side support rod and the second side support rod are connected with a rotating connecting rod corresponding to the bottom connecting swivel seat, and the first side support rod and the second side support rod are respectively rotatably connected with the connecting sleeve through the rotating connecting rods at their ends, and the inner side of the end of the connecting sleeve is telescopically connected with a telescopic support rod, and the inner side edge of the telescopic support rod is equidistantly provided with a plurality of adjusting bayonet holes, and the edge of the connecting sleeve is connected with a fixing bolt corresponding to the adjusting bayonet hole; The end of the telescopic support rod is connected to a top connecting swivel seat, and the ends of the first side support rod and the second side support rod are rotatably connected through the top connecting swivel seat at the end of the telescopic support rod. Locking bolts are connected between the end connecting rod and the bottom connecting swivel seat, the edge of the rotating connecting rod, and the top connecting swivel seat at the end of the telescopic support rod. The nut end of the locking bolt is connected to a support rod, and the end of the support rod is fixedly connected to a rope ring.

[0005] As a preferred technical solution of a bottom trawl device of the present invention, a plurality of rope rings are evenly arranged on the back edges of the bottom support rod, the first side support rod and the second side support rod, and the net rope is respectively tied and connected to the plurality of rope rings by binding ropes.

[0006] As a preferred technical solution of a bottom trawl device of the present invention, the end of the fixing bolt at the edge of the connecting sleeve is threadedly connected to the inner side of the adjusting bayonet, and the telescopic support rod is limit-connected to the inside of the connecting sleeve by the fixing bolt.

[0007] As a preferred technical solution of a bottom trawl device of the present invention, the ends of the pull rope are fixedly bound to the inner side of the rope fixing ring by binding, and the end of the pull rope away from the rope fixing ring is connected to the fishing boat.

[0008] As a preferred technical solution of the bottom trawl device of the present invention, the bottom support rod is composed of multiple groups of multi-section sleeves connected, and a rubber sleeve is connected between one end of two adjacent multi-section sleeves, and the splicing connection positions between the multiple groups of multi-section sleeves are reinforced and connected by a connecting ring, one end of the connecting ring is connected to a horizontal rod along the horizontal direction of the bottom of the trawl, and the end of the horizontal rod is connected to a stop rod; An installation cavity is provided inside the multi-section sleeve, and a connecting cable is connected to the inner side of the installation cavity. The connecting cable combines and connects the center positions of multiple groups of multi-section sleeves. The inner side of the installation cavity is located at the ends of two adjacent multi-section sleeves and is connected to a double set of twisted buffer springs.

[0009] As a preferred technical solution of a bottom trawl device of the present invention, the rubber sleeve connects and seals the connection gap between the two multi-section sleeves, and the connecting cable and the buffer spring are respectively placed on the inner side of the rubber sleeve.

[0010] As a preferred technical solution for a bottom trawl device of the present invention, the connecting cable is a steel wire rope, and the connecting cable can bend with the deformation of the buffer spring. The horizontal rod and the stop rod at its end jointly limit the position of the bottom of the trawl, so that the bottom entrance of the trawl remains flat.

[0011] As a preferred technical solution of the bottom trawl device of the present invention, the bottom end of the connecting ring is fixedly connected to a bottom connecting wheel frame, and the inner side of the bottom connecting wheel frame is embedded with a movable roller that is rotatably connected; The end of the end connecting rod is connected to a connecting plate through a support rod, and the end of the connecting plate is rotatably sleeved with a rotating sleeve through a rotating shaft, the outer side of the rotating sleeve is connected to a torsion spring sheet, and the abutment position between the edge end of the rotating sleeve and the torsion spring sheet is connected to an arc-shaped counterweight block, the end of the connecting plate is located at the outer side of the rotating sleeve and an outer sleeve is provided, and an end cover is connected to one end of the outer sleeve corresponding to the connecting plate.

[0012] As a preferred technical solution of the bottom trawl device of the present invention, the arc-shaped counterweight block is a metal block, and the cross-section of the arc-shaped counterweight block is arc-shaped, and a round convex is arranged at the bottom.

[0013] As a preferred technical solution of a bottom trawl device of the present invention, a deflection groove is provided at the bottom of the outer sleeve, the end of the arc-shaped counterweight block deflects along the deflection groove, and the arc-shaped counterweight block drives the torsion spring sheet to deflect.

[0014] (III) Beneficial effects Compared with the prior art, the present invention provides a bottom trawl device having the following beneficial effects: 1. The bottom support rod, the first side support rod and the second side support rod are used to form the frame structure of the bottom trawl, and the end portions of the bottom support rod, the first side support rod and the second side support rod are connected and restricted by the end connecting rod, the bottom connecting swivel, the rotating connecting rod, the top connecting swivel and the locking bolt to facilitate quick and convenient combination and connection, so that the scattered rod components can be quickly combined into the trawl frame, which improves the convenience of storage of the trawl frame during transportation and idleness, and avoids the problem of occupying space; At the same time, when the bottom support rod, the first side support rod and the second side support rod are connected, the rotation adjustment function of the connection therebetween is utilized, combined with the telescopic limiting function of the connecting sleeve, the telescopic support rod, the adjusting bayonet and the fixing bolt, so as to facilitate the adjustment of the length of the extended position of the first side support rod and the second side support rod, and based on the deflection function of the rotating connecting rod, it is convenient to bend the extended parts of the first side support rod and the second side support rod, so that the traditional triangular structure between the bottom support rod, the first side support rod and the second side support rod is converted into a square structure, so as to facilitate the deformation adjustment according to actual needs, thereby improving the use range of the bottom trawl net and increasing the capture efficiency of the bottom support net.

[0015] 2. The bottom support rod is composed of a plurality of multi-segment sleeves, and the rubber sleeves arranged between the plurality of multi-segment sleeves facilitate sealing of the ends of the plurality of multi-segment sleeves. At the same time, the installation cavity, the connecting cable and the buffer spring inside the multi-segment sleeve are used to facilitate combined connection between two adjacent multi-segment sleeves. Based on the deformable effect of the connecting cable and the buffer spring, when the bottom support rod is hit by an object, the connecting cable and the buffer spring are deformed so that the collision point between the bottom support rod and the object can quickly pass over the object, thereby protecting the bottom support rod and preventing the bottom support rod from being damaged due to rigid collision. The buffer spring is provided with two groups, which facilitates rapid resetting after force buffering, thereby maintaining the stability of the bottom support net frame and further improving the actual application effect. The bottom of the trawl can be conveniently limited in position by connecting rings, horizontal rods and stop rods, so that the bottom entrance of the trawl can be kept flat, which improves the convenience of fish entering and avoids the phenomenon of stacking at the entrance of the trawl.

[0016] 3. Through the multiple groups of bottom connecting wheel frames and movable rollers connected at equal distances at the bottom of the bottom support rod, the movable rollers at the bottom of the bottom support rod can be in contact with the bottom of the water during the dragging process of the bottom support rod, thereby preventing the bottom support rod from driving the trawl net to directly contact the bottom of the water, causing the trawl net to be pulled and torn, and effectively realizing the protection of the bottom support rod and the trawl net; At the same time, through the connecting plate, rotating sleeve, torsion spring sheet, arc-shaped counterweight block, outer sleeve and end cover, the two ends of the bottom support rod can contact the bottom of the water through the arc-shaped counterweight block, so that through the counterweight and arc-shaped guiding effect of the arc-shaped counterweight block, it is ensured that the bottom support rod can drive the trawl net to be stably dragged along the bottom of the water, and the fit between the trawl net and the bottom of the water is ensured, thereby improving the capture effect of the trawl net, and through the rotation of the rotating sleeve and the elastic connection of the torsion spring sheet, when the bottom support rod is dragged, the bottom of the arc-shaped counterweight block can swing more closely with the bottom support rod, thereby ensuring that the arc-shaped part of the bottom of the arc-shaped counterweight block can fit more closely to the bottom of the water, ensuring the flexibility of the bottom support rod when dragging. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention.

[0018] Figure 2 It is a structural schematic diagram of the trawl of the present invention.

[0019] Figure 3 It is a schematic structural diagram of the first side support rod of the present invention.

[0020] Figure 4 It is a structural schematic diagram of the connecting sleeve of the present invention.

[0021] Figure 5 It is a structural schematic diagram of the multi-section casing of the present invention.

[0022] Figure 6 It is a structural schematic diagram of the movable roller of the present invention.

[0023] Figure 7 It is a structural schematic diagram of the buffer spring of the present invention.

[0024] Figure 8 It is a structural schematic diagram of the arc-shaped counterweight block of the present invention.

[0025] Fig. 9 It is a schematic diagram of the triangular configuration of the bottom trawl of the present invention.

[0026] Fig.10 It is a schematic diagram of the square form of the bottom trawl of the present invention.

[0027] In the figure: 1. bottom support rod; 2. first side support rod; 3. second side support rod; 4. pull rope; 5. net rope; 6. trawl net; 7. end connecting rod; 8. bottom connecting swivel; 9. rotating connecting rod; 10. top connecting swivel; 11. locking bolt; 12. support rod; 13. rope fixing ring; 14. connecting sleeve; 15. telescopic support rod; 16. adjustment bayonet; 17. tightening bolt; 18. multi-section sleeve; 19. rubber sleeve; 20. connecting ring; 21. horizontal rod; 22. gear lever; 23. installation cavity; 24. connecting cable; 25. buffer spring; 26. bottom connecting wheel frame; 27. movable roller; 28. connecting plate; 29. ​​rotating sleeve; 30. torsion spring sheet; 31. arc-shaped counterweight block; 32. outer sleeve; 33. end cover. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example

[0029] See also Figure 1-10 The present invention provides the following technical solutions: a bottom trawl device, comprising a bottom support rod 1, one end of the bottom support rod 1 is rotatably connected to a first side support rod 2, the other end of the bottom support rod 1 is rotatably connected to a second side support rod 3, both ends of the bottom support rod 1 and the ends of the first side support rod 2 and the second side support rod 3 are fixedly connected with a pull rope 4, both ends of the bottom support rod 1 and the tops of the first side support rod 2 and the second side support rod 3 are tied with a net rope 5 on one side of the pull rope 4, a plurality of rope rings are evenly arranged on the back edges of the bottom support rod 1, the first side support rod 2 and the second side support rod 3, the net rope 5 is respectively tied and connected with the plurality of rope rings by a binding rope, so that the net rope 5 is more stable when connected, and a trawl net 6 is tied to the net rope 5 by a braided rope; The two side ends of the bottom support rod 1 are fixedly connected with the end connecting rod 7, and the one side ends of the first side support rod 2 and the second side support rod 3 are rotatably connected with the end connecting rod 7 through the bottom connecting rotating seat 8, and the other side ends of the first side support rod 2 and the second side support rod 3 are connected with the rotating connecting rod 9 corresponding to the bottom connecting rotating seat 8, and the first side support rod 2 and the second side support rod 3 are respectively rotatably connected with the connecting sleeve 14 through the rotating connecting rod 9 at their ends, and the inner side of the end of the connecting sleeve 14 is telescopically connected with the telescopic support rod 1 5. A plurality of adjusting bayonet holes 16 are provided at equal distances on the inner side end of the telescopic support rod 15, and a fixing bolt 17 is connected to the edge of the connecting sleeve 14 corresponding to the adjusting bayonet hole 16. The end of the fixing bolt 17 on the edge of the connecting sleeve 14 is connected to the inner side of the adjusting bayonet hole 16 through a thread, and the telescopic support rod 15 is limitedly connected to the inside of the connecting sleeve 14 through the fixing bolt 17, and the length of the extended position of the first side support rod 2 and the second side support rod 3 is conveniently adjusted through the connecting sleeve 14 and the telescopic support rod 15; The end of the telescopic support rod 15 is connected to a top connecting swivel 10, and the ends of the first side support rod 2 and the second side support rod 3 are rotatably connected through the top connecting swivel 10 at the end of the telescopic support rod 15. A locking bolt 11 is connected between the end connecting rod 7 and the bottom connecting swivel 8, the edge of the rotating connecting rod 9, and the top connecting swivel 10 at the end of the telescopic support rod 15. The nut end of the locking bolt 11 is connected to a support rod 12, and the end of the support rod 12 is fixedly connected to a rope ring 13. The ends of the pull rope 4 are fixedly bound to the inner side of the rope ring 13 by binding, and the end of the pull rope 4 away from the rope ring 13 is connected to the fishing boat, which is convenient for binding and limiting the end of the pull rope 4 to ensure the stability of the connection of the end of the pull rope 4.

[0030] The bottom support rod 1 is composed of a plurality of groups of multi-section sleeves 18 connected together, and a rubber sleeve 19 is connected between one end of two adjacent multi-section sleeves 18, and the splicing connection positions between the plurality of groups of multi-section sleeves 18 are reinforced and connected by a connecting ring 20, one end of the connecting ring 20 is connected to a horizontal rod 21 along the horizontal direction of the bottom of the trawl 6, and the end of the horizontal rod 21 is connected to a stop rod 22; The multi-segment casing 18 has an installation cavity 23 formed inside, and a connecting cable 24 is connected to the inner side of the installation cavity 23. The connecting cable 24 combines and connects the central positions of the multiple groups of multi-segment casings 18. The inner side of the installation cavity 23 is located at the ends of two adjacent multi-segment casings 18 and is connected with a double group of twisted buffer springs 25. The connecting cable 24 is a steel wire rope, and the connecting cable 24 can bend with the deformation of the buffer spring 25. The horizontal rod 21 and the stop rod 22 at its end jointly limit the position of the bottom of the trawl net 6, so that the bottom entrance of the trawl net 6 remains flat. Based on the variable The rubber sleeve 19 connects and blocks the connection gap between the two multi-section sleeves 18, and the connecting cable 24 and the buffer spring 25 are respectively placed on the inner side of the rubber sleeve 19. The bottom support rod 1 is composed of a plurality of multi-section sleeves 18, and the rubber sleeves 19 arranged between the plurality of multi-section sleeves 18 facilitate sealing of the ends of the plurality of multi-section sleeves 18.

[0031] The bottom end of the connecting ring 20 is fixedly connected with a bottom connecting wheel frame 26, and the inner side of the bottom connecting wheel frame 26 is embedded with a movable roller 27 which is rotatably connected; The end of the end connecting rod 7 is connected to a connecting plate 28 through a support rod, and the end of the connecting plate 28 is rotatably sleeved with a rotating sleeve 29 through a rotating shaft. The outer side of the rotating sleeve 29 is connected to a torsion spring sheet 30, and the side end of the rotating sleeve 29 and the abutment position of the torsion spring sheet 30 are connected to an arc-shaped counterweight block 31. The arc-shaped counterweight block 31 is a metal block, and the cross-section of the arc-shaped counterweight block 31 is an arc-shaped, and a round convex is provided at the bottom. Through the counterweight and arc-shaped guiding effect of the arc-shaped counterweight block 31, it is ensured that the bottom support rod 1 can drive the trawl 6 to be stably dragged along the bottom of the water The end of the connecting disk 28 is located at the outer side of the rotating sleeve 29 and is provided with an outer sleeve 32. A deflection groove is provided at the bottom of the outer sleeve 32. The end of the arc counterweight block 31 is deflected along the deflection groove, and the arc counterweight block 31 drives the torsion spring sheet 30 to deflect. Through the rotation of the rotating sleeve 29 and the elastic connection of the torsion spring sheet 30, when the bottom support rod 1 is dragged, the bottom of the arc counterweight block 31 can swing more closely with the bottom support rod 1, and the end of the outer sleeve 32 corresponding to the connecting disk 28 is connected to an end cover 33.

[0032] The working principle and use process of the present invention are as follows: before capture and use, the structural shape of the bottom trawl net needs to be deformed and adjusted according to actual needs. During adjustment, the bottom support rod 1, the first side support rod 2, and the second side support rod 3 form a frame structure of the bottom trawl net. The rotation adjustment function of the connection between the bottom support rod 1, the first side support rod 2, and the second side support rod 3 is used, combined with the telescopic limit function of the connecting sleeve 14, the telescopic support rod 15, the adjustment bayonet 16, and the fixing bolt 17, so as to facilitate adjustment of the length of the extended position of the first side support rod 2 and the second side support rod 3. Based on the deflection function of the rotating connecting rod 9, it is convenient to bend the extended parts of the first side support rod 2 and the second side support rod 3, so that the bottom support rod 1, the first side support rod 2, and the second side support rod 3 are converted from the traditional triangular structure to a square structure, so as to facilitate deformation and adjustment according to actual needs, improve the use range of the bottom trawl net, and increase the capture efficiency of the bottom support net. Furthermore, by utilizing the connection and limiting function of the end connecting rod 7, the bottom connecting swivel seat 8, the rotating connecting rod 9, the top connecting swivel seat 10 and the locking bolt 11, it is convenient to quickly and conveniently combine and connect the ends of the bottom support rod 1, the first side support rod 2 and the second side support rod 3, so that the scattered rod components can be quickly combined into a trawl net frame, which improves the convenience of storing the trawl net frame during transportation and idleness, and avoids the problem of occupying space; When the bottom trawl is actually used, the bottom of the trawl 6 is conveniently limited in position by the connecting ring 20, the horizontal rod 21, and the stop rod 22, so that the bottom entrance of the trawl 6 remains flat, which improves the convenience of the fish entering and avoids the phenomenon of stacking at the entrance of the trawl 6. At the same time, a plurality of multi-section sleeves 18 are used to form an integral bottom support rod 1, and the rubber sleeves 19 arranged between the plurality of multi-section sleeves 18 facilitate the sealing of the ends of the plurality of multi-section sleeves 18. The mounting cavity 23, the connecting cable 24 and the buffer spring 25 inside the multi-section sleeve 18 are used to conveniently combine and connect two adjacent multi-section sleeves 18. Based on the deformable effect of the connecting cable 24 and the buffer spring 25, when the bottom support rod 1 is hit by an object, the connecting cable 24 and the buffer spring 25 are deformed so that the collision point between the bottom support rod 1 and the object can quickly pass over the object, thereby protecting the bottom support rod 1 and preventing the bottom support rod 1 from being damaged due to rigid collision. The buffer spring 25 is provided with two groups, which is convenient for rapid reset after force buffering, so as to maintain the stability of the bottom support net frame and improve the effect of practical application. In addition, by connecting multiple groups of bottom connecting wheel frames 26 and movable rollers 27 at equal distances at the bottom of the bottom support rod 1, the movable rollers 27 at the bottom of the bottom support rod 1 can be brought into contact with the bottom of the water during the dragging process of the bottom support rod 1, thereby preventing the bottom support rod 1 from driving the trawl net 6 to directly contact the bottom of the water, causing the trawl net 6 to be pulled and torn, thereby effectively protecting the bottom support rod 1 and the trawl net 6; By combining the connecting plate 28, the rotating sleeve 29, the torsion spring sheet 30, the arc-shaped counterweight block 31, the outer sleeve 32 and the end cover 33, the two ends of the bottom support rod 1 can contact the bottom of the water through the arc-shaped counterweight block 31, so that the bottom support rod 1 can drive the trawl net 6 to be stably dragged along the bottom of the water through the counterweight and arc-shaped guiding effect of the arc-shaped counterweight block 31, and the fit between the trawl net 6 and the bottom of the water is ensured, thereby improving the capture effect of the trawl net 6; On this basis, through the rotation of the rotating sleeve 29 and the elastic connection of the torsion spring sheet 30, when the bottom support rod 1 is dragged, the bottom of the arc-shaped counterweight block 31 can swing more closely with the bottom support rod 1, thereby ensuring that the arc-shaped part of the bottom of the arc-shaped counterweight block 31 can fit more closely to the bottom of the water, ensuring the flexibility of the bottom support rod 1 when dragging.

[0033] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A bottom trawl device, comprising a bottom support rod (1), characterized in that: One end of the bottom support rod (1) is rotatably connected to the first side support rod (2), and the other end of the bottom support rod (1) is rotatably connected to the second side support rod (3). Both ends of the bottom support rod (1) and the ends of the first side support rod (2) and the second side support rod (3) are fixedly connected to a pull rope (4). Both ends of the bottom support rod (1) and the tops of the first side support rod (2) and the second side support rod (3) are tied to a net rope (5) on one side of the pull rope (4), and a trawl net (6) is tied to the net rope (5) via a braided rope. Both side ends of the bottom support rod (1) are fixedly connected with end connecting rods (7); one side end of the first side support rod (2) and the second side support rod (3) is rotatably connected to the end connecting rod (7) via a bottom connecting rotating seat (8); the other side end of the first side support rod (2) and the second side support rod (3) is connected with a rotating connecting rod (9) corresponding to the bottom connecting rotating seat (8); and the first side support rod (2) and the second side support rod (3) are rotatably connected to a connecting sleeve (14) via the rotating connecting rods (9) at their ends respectively; a telescopic support rod (15) is telescopically connected to the inner side of the end of the connecting sleeve (14); a plurality of adjusting bayonet holes (16) are equidistantly provided on the inner side edge of the telescopic support rod (15); and a fixing bolt (17) is connected to the edge of the connecting sleeve (14) corresponding to the adjusting bayonet hole (16); The end of the telescopic support rod (15) is connected to a top connecting swivel seat (10), the ends of the first side support rod (2) and the second side support rod (3) are both rotatably connected via the top connecting swivel seat (10) at the end of the telescopic support rod (15), a locking bolt (11) is connected between the end connecting rod (7) and the bottom connecting swivel seat (8), the edge of the rotating connecting rod (9), and the top connecting swivel seat (10) at the end of the telescopic support rod (15), the nut end of the locking bolt (11) is connected to a support rod (12), and the end of the support rod (12) is fixedly connected to a rope fixing ring (13).

2. A bottom trawl device according to claim 1, characterized in that: A plurality of rope rings are evenly arranged on the back side ends of the bottom support rod (1), the first side support rod (2) and the second side support rod (3), and the net rope (5) is respectively tied and connected to the plurality of rope rings by means of binding ropes.

3. A bottom trawl device according to claim 1, characterized in that: The end of the fixing bolt (17) on the edge of the connecting sleeve (14) is connected to the inner side of the adjusting bayonet (16) through a thread, and the telescopic support rod (15) is positionally connected to the inside of the connecting sleeve (14) through the fixing bolt (17).

4. A bottom trawl device according to claim 1, characterized in that: The ends of the pull rope (4) are fixedly bound to the inner side of the rope fixing ring (13) by binding, and the end of the pull rope (4) away from the rope fixing ring (13) is connected to the fishing boat.

5. A bottom trawl device according to claim 1, characterized in that: The bottom support rod (1) is composed of a plurality of groups of multi-section sleeves (18) connected together, and a rubber sleeve (19) is connected between one end of two adjacent multi-section sleeves (18), and the spliced ​​connection positions between the plurality of groups of multi-section sleeves (18) are reinforced and connected by a connecting ring (20), one end of the connecting ring (20) is connected to a horizontal rod (21) along the horizontal direction of the bottom of the trawl (6), and the end of the horizontal rod (21) is connected to a stop rod (22); The multi-segment sleeve (18) has an installation cavity (23) formed inside, and a connecting cable (24) is connected to the inside of the installation cavity (23). The connecting cable (24) combines and connects the center positions of multiple groups of multi-segment sleeves (18). The ends of two adjacent multi-segment sleeves (18) are connected to two groups of twisted buffer springs (25) on the inside of the installation cavity (23).

6. A bottom trawl device according to claim 5, characterized in that: The rubber sleeve (19) connects and seals the connection gap between the two multi-section sleeves (18), and the connecting cable (24) and the buffer spring (25) are respectively placed on the inner side of the rubber sleeve (19).

7. A bottom trawl device according to claim 5, characterized in that: The connecting cable (24) is a steel wire rope, and the connecting cable (24) can bend as the buffer spring (25) deforms. The horizontal rod (21) and the stop rod (22) at its end jointly limit the position of the bottom of the trawl net (6), so that the bottom entrance of the trawl net (6) remains flat.

8. A bottom trawl device according to claim 5, characterized in that: The bottom end of the connecting ring (20) is fixedly connected to a bottom connecting wheel frame (26), and a movable roller (27) is embedded and rotatably connected inside the bottom connecting wheel frame (26); The end of the end connecting rod (7) is connected to a connecting plate (28) via a supporting rod, the end of the connecting plate (28) is rotatably sleeved with a rotating sleeve (29) via a rotating shaft, the outer side of the rotating sleeve (29) is connected to a torsion spring sheet (30), and the abutment position between the edge of the rotating sleeve (29) and the torsion spring sheet (30) is connected to an arc-shaped counterweight block (31), the end of the connecting plate (28) is provided with an outer sleeve (32) at a position outside the rotating sleeve (29), and the end of the outer sleeve (32) corresponding to the connecting plate (28) is connected to an end cover (33).

9. A bottom trawl device according to claim 8, characterized in that: The arc-shaped counterweight block (31) is a metal block, and the cross section of the arc-shaped counterweight block (31) is arc-shaped, with a round convexity being provided at the bottom.

10. A bottom trawl device according to claim 9, characterized in that: A deflection groove is provided at the bottom of the outer sleeve (32), and the end of the arc-shaped counterweight block (31) deflects along the deflection groove, and the arc-shaped counterweight block (31) drives the torsion spring sheet (30) to deflect.

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