Cast iron weighted triangular trawl for benthonic animals

Abstract

The utility model relates to a cast iron weighted triangular trawl for benthonic animals, and aims to solve the technical problems that the conventional triangular trawl is integrally and fixedly connected and cannot be folded and assembled, so that the size is large, the trawl is inconvenient to carry, the carrying workload of sampling personnel is greatly increased, and the trawl is light in weight and not easy to sink into the river bottom for use. Comprising a triangular frame A and a triangular frame B, a triangular trawl net is fixedly connected between the triangular frame A and the triangular frame B, the opposite ends of the triangular frame A and the triangular frame B are fixedly connected with three external thread cylinders, and notches are formed in the two ends of the six external thread cylinders. In addition, the triangular frame A and the triangular frame B which are made of cast iron are matched to increase the overall weight, so that the triangular trawl net can enter water conveniently.

Description

Technical Field

[0001] The utility model relates to the field of triangular trawls, in particular to a cast iron weighted triangular trawl for benthic animals. Background Art

[0002] Benthic animals refer to groups of organisms that live on the surface of the seafloor for all or most of their life history. They are an important part of the marine ecosystem. They interact with the surrounding environment through activities such as feeding, burrowing and building pipes. Changes in their species, quantity and community structure are important indicators for understanding the characteristics of the marine environment and indicating environmental quality. Benthic animal trawl is one of the main tools for collecting benthic animal samples.

[0003] The traditional triangular trawl is fixed as a whole and cannot be folded and assembled, so it is large and inconvenient to carry, which greatly increases the workload of samplers. In addition, the trawl is light and not easy to sink to the bottom of the river for use. Therefore, a new technical solution needs to be designed to solve this problem. Utility Model Content

[0004] The utility model aims to overcome the deficiencies of the prior art, meet actual needs, and provide a cast iron weighted benthic animal triangular trawl to solve the technical problems that the current triangular trawl is fixedly connected as a whole, cannot be folded and assembled, is large in size and inconvenient to carry, greatly increases the workload of sampling personnel, and the trawl is light in weight and not easy to sink to the river bottom for use.

[0005] In order to achieve the purpose of the utility model, the technical solution adopted by the utility model is as follows: a cast iron weighted benthic animal triangular trawl is designed, comprising a triangular frame A and a triangular frame B, wherein the triangular trawl is fixedly connected between the triangular frame A and the triangular frame B, three externally threaded barrels are fixedly connected to the opposite ends of the triangular frame A and the triangular frame B, notches are provided at both ends of the six externally threaded barrels, connecting shafts are fixedly connected between the two sides of the inner cavity of the six externally threaded barrels, and the outer sides of the connecting shafts in the three externally threaded barrels on the triangular frame A are rotatably connected to the first connecting rods; the other ends of the three first connecting rods are provided with connecting grooves, rotating shafts are fixedly connected in the three connecting grooves, and the outer sides of the three rotating shafts are fixedly connected to fixing rods, and the same ends of the three fixing rods are fixedly connected to second connecting rods, and the other ends of the three second connecting rods are respectively rotatably connected to the outer sides of the connecting shafts in the three externally threaded barrels on the triangular frame B, and the outer sides of the three first connecting rods and the three second connecting rods are rotatably sleeved with internally threaded barrels.

[0006] Preferably, the outer diameters of the first connecting rod and the second connecting rod both correspond to and match the inner size of the notch.

[0007] Preferably, three connecting rings are installed at one end of the triangular frame A away from the external threaded barrel.

[0008] Preferably, an anti-slip groove is provided on the outer side of the internal threaded barrel, and a plurality of the anti-slip grooves are equidistantly distributed on the outer side of the internal threaded barrel.

[0009] Preferably, the triangular frame A and the triangular frame B are both made of iron casting.

[0010] Preferably, one end of the fixing rod is placed outside the connecting groove.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] The utility model combines structures such as an internal threaded cylinder, an external threaded cylinder, a connecting shaft, a notch, a first connecting rod, a second connecting rod, a rotating shaft, a connecting groove and a fixed rod. By twisting the internal threaded cylinder to disengage from the external threaded cylinder, the first connecting rod and the second connecting rod can rotate with the connecting shaft as the center of a circle, so that the first connecting rod and the second connecting rod can be rotated in the direction of the triangular trawl by cooperating with the notch. At the same time, by cooperating with the rotating shaft, the connecting groove and the fixed rod, the first connecting rod and the second connecting rod can be folded, so that the triangular frame A and the triangular frame B can be close to each other to reduce the overall volume. When in use, the triangular frame A and the triangular frame B are pulled in opposite directions, so that the external threaded cylinder, the first connecting rod and the second connecting rod are on the same horizontal line. The internal threaded cylinder is twisted to connect with the external threaded cylinder, so that the triangular trawl is stretched out for use, which is convenient for people to carry and use. In addition, the cast iron triangular frame A and the triangular frame B increase the overall weight to facilitate the entry of the triangular trawl into the water. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 It is a schematic diagram of the connection structure between the first connecting rod and the second connecting rod of the utility model;

[0015] Figure 3 It is an enlarged view of point A of the utility model;

[0016] Figure 4 It is an enlarged view of point B of the utility model;

[0017] In the figure: 1. triangular frame A; 11. triangular frame B; 12. external threaded cylinder; 13. triangular trawl; 14. first connecting rod; 15. second connecting rod; 16. internal threaded cylinder; 2. connecting ring; 3. anti-slip groove; 4. connecting groove; 41. rotating shaft; 42. fixing rod; 5. notch; 51. connecting shaft. DETAILED DESCRIPTION

[0018] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0019] Example 1: A cast iron weighted benthic triangular trawl, see Figures 1 to 4 , including a triangular frame A1 and a triangular frame B11, a triangular trawl 13 is fixedly connected between the triangular frame A1 and the triangular frame B11, three external threaded tubes 12 are fixedly connected to the opposite ends of the triangular frame A1 and the triangular frame B11, both ends of the six external threaded tubes 12 are provided with notches 5, and connecting shafts 51 are fixedly connected between the two sides of the inner cavity of the six external threaded tubes 12, and the outer sides of the connecting shafts 51 in the three external threaded tubes 12 on the triangular frame A1 are rotatably connected to the first connecting rod 14; the three The other ends of the first connecting rods 14 are each provided with a connecting groove 4, and the three connecting grooves 4 are each fixedly connected with a rotating shaft 41, and the outer sides of the three rotating shafts 41 are each fixedly connected with a fixing rod 42, and one end of the three fixing rods 42 is respectively placed on the outer sides of the three connecting grooves 4, and the same end of the three fixing rods 42 is fixedly connected with a second connecting rod 15, and the other ends of the three second connecting rods 15 are respectively rotatably connected to the outer sides of the connecting shafts 51 in the three externally threaded cylinders 12 on the triangular frame B11. The outer sides of the three second connecting rods 15 are all rotatably sleeved with an internal threaded tube 16, and the triangular frame A1 and the triangular frame B11 are both made of iron casting. When working, the internal threaded tube 16 is twisted to disengage the external threaded tube 12, so that the first connecting rod 14 and the second connecting rod 15 can rotate with the connecting shaft 51 as the center of the circle, so that the first connecting rod 14 and the second connecting rod 15 can be rotated toward the triangular trawl 13 by cooperating with the notch 5, and at the same time, the first connecting rod 14 and the second connecting rod 15 can be rotated by cooperating with the rotating shaft 41, the connecting groove 4 and the fixing rod 42. 5 is folded, so that the triangular frame A1 and the triangular frame B11 can be close to each other to reduce the overall volume. When in use, the triangular frame A1 and the triangular frame B11 are pulled in opposite directions, so that when the external threaded cylinder 12, the first connecting rod 14 and the second connecting rod 15 are on the same horizontal line, the internal threaded cylinder 16 is twisted to connect with the external threaded cylinder 12, so that the triangular trawl 13 is stretched out for use, thereby making it convenient for people to carry and use, and the cast iron triangular frame A1 and the triangular frame B11 increase the overall weight to facilitate the triangular trawl 13 to enter the water.

[0020] For details, see Figure 3 The outer diameters of the first connecting rod 14 and the second connecting rod 15 correspond to and match the inner size of the notch 5 , so as to ensure that the first connecting rod 14 and the second connecting rod 15 can be rotated and folded through the notch 5 .

[0021] For further information, see Figure 1The end of the triangular frame A1 away from the external threaded tube 12 is equipped with three connecting rings 2, and the connection of the traction rope is facilitated by the setting of the connecting rings 2.

[0022] It is worth noting that see Figure 2 An anti-skid groove 3 is provided on the outer side of the internal threaded barrel 16, and a plurality of the anti-skid grooves 3 are equidistantly distributed on the outer side of the internal threaded barrel 16. The anti-skid grooves 3 are used to increase the friction force of a person holding the internal threaded barrel 16, thereby facilitating the person manually twisting the internal threaded barrel 16 to rotate and disassemble the external threaded barrel 12.

[0023] In addition, the components designed in the present invention are all universal standard parts or components known to technical personnel in the field. Their structures and principles can be known to technical personnel through technical manuals or through conventional experimental methods. They can be fully implemented by technical personnel in the field, and there is no need to elaborate. The content protected by the present invention does not involve improvements to internal structures and methods.

[0024] The embodiments of the present invention disclose preferred embodiments, but are not limited thereto. A person skilled in the art can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. However, as long as they do not deviate from the spirit of the present invention, they are all within the protection scope of the present invention.

Claims

1. A cast iron weighted benthic triangular trawl, comprising a triangular frame A (1) and a triangular frame B (11), characterized in that: A triangular trawl (13) is fixedly connected between the triangular frame A (1) and the triangular frame B (11); three externally threaded cylinders (12) are fixedly connected at opposite ends of the triangular frame A (1) and the triangular frame B (11); notches (5) are provided at both ends of the six externally threaded cylinders (12); connecting shafts (51) are fixedly connected between both sides of the inner cavities of the six externally threaded cylinders (12); and first connecting rods (14) are rotatably connected to the outer sides of the connecting shafts (51) in the three externally threaded cylinders (12) on the triangular frame A (1); The other ends of the three first connecting rods (14) are each provided with a connecting groove (4), the three connecting grooves (4) are each fixedly connected with a rotating shaft (41), the outer sides of the three rotating shafts (41) are each fixedly connected with a fixing rod (42), the same end of the three fixing rods (42) is each fixedly connected with a second connecting rod (15), the other ends of the three second connecting rods (15) are respectively rotatably connected to the outer sides of the connecting shafts (51) in the three externally threaded cylinders (12) on the triangular frame B (11), and the outer sides of the three first connecting rods (14) and the three second connecting rods (15) are each rotatably sleeved with an internally threaded cylinder (16).

2. A cast iron weighted benthic triangular trawl as claimed in claim 1, characterized in that: The outer diameters of the first connecting rod (14) and the second connecting rod (15) both correspond to and match the inner dimensions of the notch (5).

3. A cast iron weighted benthic triangular trawl as claimed in claim 1, characterized in that: Three connecting rings (2) are installed at one end of the triangular frame A (1) away from the external threaded barrel (12).

4. A cast iron weighted benthic triangular trawl as claimed in claim 1, characterized in that: An anti-slip groove (3) is provided on the outer side of the internal threaded barrel (16), and a plurality of the anti-slip grooves (3) are evenly distributed on the outer side of the internal threaded barrel (16).

5. A cast iron weighted benthic triangular trawl as claimed in claim 1, characterized in that: The triangular frame A (1) and the triangular frame B (11) are both made of iron casting.

6. A cast iron weighted benthic triangular trawl as claimed in claim 1, characterized in that: One end of the fixing rod (42) is placed outside the connecting groove (4).

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