A floating pipe connecting fitting for a marine net cage

Abstract

The utility model relates to the technical field of ocean culture equipment, more particularly to a kind of float tube connecting fitting for marine net cage, including first swivel joint and second swivel joint, first swivel joint includes first fusion portion and the first rotation portion connected with first fusion portion, second swivel joint includes second fusion portion and the second rotation portion connected with second fusion portion, and first rotation portion is rotatably connected with second rotation portion;First fusion portion and second fusion portion are both provided with the accommodating cavity for accommodating pipe fitting.The utility model can increase the angle change of float tube connection, improve adaptability.

Description

Technical Field

[0001] This utility model relates to the field of marine aquaculture equipment technology, and more specifically, to a floating pipe connecting accessory for marine cages. Background Technology

[0002] With the rapid development of the marine aquaculture industry, structural innovation in cage equipment has become a crucial breakthrough in improving its resistance to wind and waves and its functional adaptability. Especially in open sea environments, cage frames with special configurations such as ship-shaped and polyhedral structures exhibit significant advantages: their streamlined structure can effectively reduce wave and current impact loads by more than 30%, while their irregular spatial layout can better meet the zoning management needs of high-density aquaculture.

[0003] However, current floating pipe connection technology severely restricts the structural innovation of gabion frames, mainly in two dimensions: defects in angle adaptability and potential risks in connection quality. Existing floating pipe connection fittings only offer two standard angle joints: 135° and 90°. This forces the frame design to adopt a zigzag splicing method, making it difficult to achieve the optimal curvature transition conforming to fluid dynamics. Although the industry has attempted to achieve non-standard angle connections through oblique welding of pipes, this process has significant technical bottlenecks: First, the obliquely cut pipe end cross-section exhibits asymmetrical geometric characteristics. When the two pipes are butt-welded, the large cross-section area suffers from insufficient melting due to delayed heat conduction, while the thin-walled area becomes excessively softened. This non-uniform phase transformation process leads to defects such as porosity and lack of fusion in the weld, with tests showing a 45% decrease in tensile strength compared to standard welding. Second, the acute angle structure formed at the connection point exacerbates stress concentration, making it highly susceptible to fatigue cracks under alternating loads. In practical applications, 78% of structural failures originate from such connection nodes. Furthermore, this process requires operators to possess a combination of skills, including three-dimensional spatial angle calculation, precise cutting and positioning, and specialized welding. The processing time for a single part is more than three times that of a standard part, severely hindering the feasibility of large-scale production. These technological shortcomings have become the core bottleneck restricting the upgrading of deep-sea aquaculture equipment. Utility Model Content

[0004] The purpose of this invention is to overcome the single angle of the existing marine cage floating pipe connection and to provide a floating pipe connection accessory for marine cages that can increase the angle variation of the floating pipe connection and improve adaptability.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0006] A floating pipe connection fitting for marine cages is provided, comprising a first swivel joint and a second swivel joint. The first swivel joint includes a first welding portion and a first rotating portion connected to the first welding portion. The second swivel joint includes a second welding portion and a second rotating portion connected to the second welding portion. The first rotating portion and the second rotating portion are rotatably connected. Both the first welding portion and the second welding portion are provided with a receiving cavity for accommodating the pipe fitting.

[0007] In the above scheme, the first rotary joint and the second rotary joint are rotatably connected and installed together through the first rotating part and the second rotating part. When building the floating pipe of the cage, the first rotary joint or the second rotary joint is rotated so that the included angle between the two rotary joints can be changed arbitrarily within the rotation range. Workers can directly rotate the rotary joint to the required angle according to the design requirements, and then weld the corresponding floating pipe on the welding part. The entire floating pipe installation process does not require the pipe to be cut and welded to achieve non-standard angle connection, avoiding a series of stress concentration problems caused by welding, and effectively improving the installation efficiency.

[0008] Furthermore, it also includes a composite pin, through which the first rotating part is rotatably connected to the second rotating part; the insertion of the first rotating part and the second rotating part into the composite pin does not require complex parts (such as bearings), reducing the number of parts and manufacturing costs. The cylindrical design of the pin can increase the contact area, effectively dispersing radial loads, while improving the modularity of the entire accessory, which is conducive to the standardization of parts and reduces design complexity. In corrosive environments such as the ocean, it can facilitate the replacement of accessories after corrosion and damage.

[0009] Furthermore, the first rotating part is provided with a first through hole, and the second rotating part is provided with a second through hole. The composite tube pin is installed in the first through hole and the second through hole. The composite tube pin serves as the rotation center for the rotational connection between the first rotary joint and the second rotary joint. By being installed in the first through hole and the second through hole, the two are fixed together, enabling the first rotary joint and the second rotary joint to rotate around the composite tube pin. This ensures that the rotation axes of the two rotating parts are aligned, reduces vibration or wear caused by eccentricity, and improves motion stability. Through reasonable tolerance design, low-friction rotation can also be achieved.

[0010] Furthermore, the first rotating part includes a first through pin post and a second through pin post, with the first through hole located within the first and second through pin posts, and a gap formed between the first and second through pin posts; the second rotating part includes a third and a fourth through pin post, with the second through hole located within the third and fourth through pin posts, and a gap formed between the third and fourth through pin posts; the first through pin post is located between the third and fourth through pin posts, and the third through pin post is located between the first and second through pin posts; the four through pin posts of the two rotary joints are staggered and connected through the spacing design, which restricts the radial movement of the first and second rotating heads along the composite pin, and compared to the simple direct stacking and docking of the pin posts, it can achieve a smaller and more compact size.

[0011] Furthermore, the composite pin includes a metal layer and a plastic layer encasing the metal layer; the first, second, third, and fourth through pins all apply a shear stress to the composite pin. The metal layer inside the composite pin enhances the shear resistance of the pin body and improves the reliability of the rotating connection. Since this connection fitting is used at sea, and the strong corrosiveness of seawater will corrode the metal layer, setting the plastic layer as the outermost layer can prevent the external environment from corroding the metal parts inside the composite pin.

[0012] Furthermore, one end of the composite pin is provided with a flange portion, and one end face of both the second through pin post and the fourth through pin post is provided with a flange abutment portion, and the flange portion is fixedly connected to the flange abutment portion; this fixed connection can be a threaded connection or a groove and protrusion engaging connection, which can restrict the movement of the composite pin shaft and prevent the composite pin from falling off during use.

[0013] Furthermore, the composite tube pin is provided with a cavity that connects to the outside, and the cavity is provided with reinforcing ribs; considering the lightweight design of the accessories and cost savings, the composite tube pin is therefore designed with a cavity, and the reinforcing ribs inside the cavity can effectively compensate for the loss of structural strength caused by the cavity.

[0014] Furthermore, it also includes a first connecting plate and a second connecting plate. The first connecting plate is connected to the first welding part and the first rotating part at both ends, and the second connecting plate is connected to the second welding part and the second rotating part at both ends. The first welding part and the first rotating part adopt a plate-shaped connection structure, which has higher structural strength, better stability, and is more durable than the rod-shaped connection structure, effectively improving the connection reliability between the rotating part and the welding part.

[0015] Furthermore, the first welded portion and the second welded portion have an open end and a closed end at their ends, respectively, and the receiving cavity is formed between the open end and the closed end; the first rotating portion is connected to the closed end of the first welded portion; the second rotating portion is connected to the closed end of the second welded portion; after the open end is welded to the floating tube, it can form more internal cavities with the closed end, which can provide more buoyancy and increase the floating stability of the entire cage structure in the sea.

[0016] Furthermore, the receiving cavity forms a flared section and a necked section in the direction from the open end to the closed end; the necked section does not participate in the welding of the float tube, and the diameter of the necked section is smaller than the diameter of the flared section. When the first rotary joint and the second rotary joint rotate to abut each other, the outer side of the closed end of the welded part will abut first. The necked section reduces the diameter. Compared with not setting the necked section to reduce the diameter, under the condition that the first rotary joint and the second rotary joint rotate to the same angle and the outer side of the closed end of the welded part abuts, the length required for the first connecting plate and the second connecting plate with the necked section structure is shorter, and the size can be made smaller, thereby reducing the volume of the entire accessory and the lever arm of the rotation of the first rotary joint and the second rotary joint.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. The first rotary joint includes a first welding part and a first rotating part connected to the first welding part. The second rotary joint includes a second welding part and a second rotating part connected to the second welding part. The first rotating part and the second rotating part are rotatably connected. Both the first welding part and the second welding part are provided with receiving cavities for accommodating pipe fittings. Workers can directly rotate the rotary joint to the required angle according to the design requirements, and then weld the corresponding floating pipe on the welding part. The entire floating pipe installation process does not require pipe beveling welding to achieve non-standard angle connection, avoiding a series of stress concentration problems caused by welding, and effectively improving the installation efficiency.

[0019] 2. The innermost layer of the composite pipe pin is a metal layer, and the outermost layer is a plastic layer. The metal layer inside the composite pipe pin enhances the shear resistance of the pin body and improves the reliability of the rotating connection. The plastic layer protects the metal layer from seawater corrosion, effectively improving the service life of the entire composite pipe pin. Attached Figure Description

[0020] Figure 1 A perspective view of a floating pipe connection fitting for marine cages;

[0021] Figure 2 A perspective view of the first rotary joint of a floating pipe connection fitting for marine cages;

[0022] Figure 3A perspective view of a second rotary joint for a floating pipe connection fitting for marine cages;

[0023] Figure 4 A three-dimensional view of a composite pipe pin for connecting floating pipes in marine cages;

[0024] Figure 5 This is a schematic diagram of the internal structure of a composite pipe pin for a floating pipe connection fitting used in marine cages.

[0025] In the attached figures: 100, first rotary joint; 110, first welding section; 120, first rotating section; 121, first through-hole post; 122, second through-hole post; 200, second rotary joint; 210, second welding section; 220, second rotating section; 221, third through-hole post; 222, fourth through-hole post; 300, receiving cavity; 310, flared section; 320, necked section; 400, composite pipe pin; 410, metal layer; 420, plastic layer; 430, flange section; 440, reinforcing rib; 500, first through hole; 600, second through hole; 700, flange abutment section; 800, first connecting plate; 900, second connecting plate. Detailed Implementation

[0026] The present invention will be further described below with reference to specific embodiments. The accompanying drawings are for illustrative purposes only, representing schematic diagrams rather than actual physical objects, and should not be construed as limiting the scope of this patent. To better illustrate the embodiments of the present invention, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0027] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0028] Example 1

[0029] This embodiment is a first embodiment of a floating pipe connection fitting for marine cages, such as... Figures 1 to 3As shown, it includes a first rotary joint 100 and a second rotary joint 200. The first rotary joint 100 includes a first welding part 110 and a first rotating part 120 connected to the first welding part 110. The second rotary joint 200 includes a second welding part 210 and a second rotating part 220 connected to the second welding part 210. The first rotating part 120 and the second rotating part 220 are rotatably connected. Both the first welding part 110 and the second welding part 210 are provided with a receiving cavity 300 for accommodating the pipe fitting.

[0030] Specifically, it also includes a composite pin 400. The first rotating part 120 is rotatably connected to the second rotating part 220 through the composite pin 400. The insertion of the first rotating part 120 and the second rotating part 220 into the composite pin 400 does not require complex parts (such as bearings), which reduces the number of parts and manufacturing costs. The cylindrical design of the pin can increase the contact area, effectively distribute radial loads, and improve the modularity of the entire accessory. This is conducive to the standardization of parts, reduces design complexity, and facilitates replacement of accessories after corrosion damage in corrosive marine environments.

[0031] Specifically, the first rotating part 120 is provided with a first through hole 500, and the second rotating part 220 is provided with a second through hole 600. The composite tube pin 400 is installed in the first through hole 500 and the second through hole 600. The composite tube pin 400 serves as the rotation center for the rotational connection between the first rotary joint 100 and the second rotary joint 200. By being installed in the first through hole 500 and the second through hole 600, the two are fixed together, allowing the first rotary joint 100 and the second rotary joint 200 to rotate around the composite tube pin 400. This ensures that the rotation axes of the two rotating parts are aligned, reduces vibration or wear caused by eccentricity, and improves motion stability. Through reasonable tolerance design, low-friction rotation can also be achieved.

[0032] Specifically, the first rotating part 120 includes a first through-hole post 121 and a second through-hole post 122, with a first through hole 500 located within the first through-hole post 121 and the second through-hole post 122, forming a gap between the first through-hole post 121 and the second through-hole post 122; the second rotating part 220 includes a third through-hole post 221 and a fourth through-hole post 222, with a second through hole 600 located within the third through-hole post 221 and the fourth through-hole post 222, and the third through-hole post 221 and the fourth through-hole post 222 forming a gap between them. A gap is formed between 222; the first through pin post 121 is located between the third through pin post 221 and the fourth through pin post 222, and the third through pin post 221 is located between the first through pin post 121 and the second through pin post 122; the four through pin posts of the two rotary joints are interconnected by the spacing design, which restricts the radial movement of the first rotary head and the second rotary head along the composite tube pin 400, and can achieve a smaller size and more compact size compared to the simple direct stacking and docking of the pins.

[0033] Specifically, one end of the composite pin 400 is provided with a flange portion 430, and one end face of the second through pin post 122 and the fourth through pin post 222 are both provided with flange abutment portions 700. The flange portion 430 and the flange abutment portion 700 are fixedly connected. This fixed connection can be a threaded connection or a groove and protrusion engaging connection, which can restrict the movement of the composite pin 400 and prevent the composite pin 400 from falling off during use. In this embodiment, the flange portion 430 is provided with multiple arc-shaped grooves, and the flange abutment portion 700 is provided with threaded holes. After the angle adjustment is completed, the arc-shaped grooves can remain in communication with the threaded holes, thereby achieving a fixed connection between the two through fasteners.

[0034] The working principle of a floating pipe connecting accessory for marine cages in this embodiment is as follows:

[0035] During installation, the composite pipe pin 400 is inserted into the first through hole 500 on the first through pin post 121 and the second through pin post 122, and the second through hole 600 on the third through pin post 221 and the fourth through pin post 222. The flange part 430 is then fixedly connected to the flange abutment part 700. After installation, the float pipe is welded onto the first welding part 110 and the second welding part 210. After welding, the first rotating part 120 and the second rotating part 220 are rotated directly to rotate the first rotary joint 100 and the second rotary joint 200 to the required connection angle, thus completing the installation of the entire accessory.

[0036] The beneficial effects of this embodiment are: workers can directly rotate the rotary joint to the required angle according to the design requirements, and then weld the corresponding floating pipe on the welding part. The entire floating pipe installation process does not require pipe beveling welding to achieve non-standard angle connection, avoiding a series of stress concentration problems caused by welding, and effectively improving the installation efficiency.

[0037] Example 2

[0038] This embodiment is a second embodiment of a floating pipe connecting fitting for marine cages, such as... Figures 2 to 5 As shown, the difference from Embodiment 1 is as follows:

[0039] Specifically, the composite pin 400 includes a metal layer 410 and a plastic layer 420 that wraps around the metal layer 410. The first pin hole post 121, the second pin hole post 122, the third pin hole post 221, and the fourth pin hole post 222 all apply a shear stress to the composite pin 400. The metal layer 410 inside the composite pin 400 enhances the shear resistance of the pin body and improves the reliability of the rotating connection. Since this connection fitting is used at sea, and the strong corrosiveness of seawater will corrode the metal layer 410, setting the plastic layer 420 as the outermost layer can prevent the external environment from corroding the metal parts inside the composite pin 400.

[0040] Specifically, the composite pin 400 has a cavity connecting to the outside, and a reinforcing rib 440 is provided inside the cavity. Considering the lightweight design of the accessory and cost savings, the composite pin 400 is therefore designed with a cavity inside, and the reinforcing rib 440 inside the cavity can effectively compensate for the loss of structural strength caused by the cavity. In this embodiment, the reinforcing rib is cross-shaped.

[0041] The working principle of a floating pipe connecting accessory for marine cages in this embodiment is as follows:

[0042] During use, the metal layer 410 and reinforcing rib 440 of the composite pin 400 bear the shear stress applied by the first through pin post 121, the second through pin post 122, the third through pin post 221, and the fourth through pin post 222. The plastic layer 420 covers the metal layer 410 to prevent seawater from corroding the metal layer 410.

[0043] The beneficial effects of this embodiment are: the provision of the metal layer 410, the reinforcing rib 440 and the plastic layer 420 effectively improves the service life of the entire composite pipe pin 400.

[0044] Example 3

[0045] This embodiment is a third embodiment of a floating pipe connecting fitting for marine cages, such as... Figures 2 to 4 As shown, the difference from Embodiment 1 is as follows:

[0046] Specifically, it also includes a first connecting plate 800 and a second connecting plate 900. The first connecting plate 800 is connected to the first welding part 110 and the first rotating part 120 at both ends, and the second connecting plate 900 is connected to the second welding part 210 and the second rotating part 220 at both ends. The first welding part 110 and the first rotating part 120 adopt a plate-shaped connection structure, which has higher structural strength, better stability, and is more durable than the rod-shaped connection structure, effectively improving the connection reliability between the rotating part and the welding part.

[0047] Specifically, the two ends of the first welded part 110 and the second welded part 210 are an open end and a closed end, respectively, and a receiving cavity 300 is formed between the open end and the closed end; the first rotating part 120 is connected to the closed end of the first welded part 110; the second rotating part 220 is connected to the closed end of the second welded part 210; after the open end is welded with the floating tube, it can form more internal cavities with the closed end, which can provide more buoyancy and increase the floating stability of the entire cage structure in the sea.

[0048] Specifically, the receiving cavity 300 forms a flared section 310 and a necked section 320 in the direction from the open end to the closed end. The necked section 320 does not participate in the welding of the float tube. The diameter of the necked section 320 is smaller than the diameter of the flared section 310. When the first rotary joint 100 and the second rotary joint 200 rotate to abut each other, the outer side of the closed end of the welded part will abut first. The necked section 320 reduces the diameter. Compared with not setting the necked section 320 to reduce the diameter, under the condition that the first rotary joint 100 and the second rotary joint 200 rotate to the same angle and the outer side of the closed end of the welded part abuts, the length required for the first connecting plate 800 and the second connecting plate 900 with the necked section 320 structure is shorter, and the size can be made smaller, thereby reducing the volume of the entire accessory and the lever arm of the rotation of the first rotary joint 100 and the second rotary joint 200.

[0049] The working principle of a floating pipe connecting accessory for marine cages in this embodiment is as follows:

[0050] After the first welding part 110 and the second welding part 210 weld the floating pipes, under the connection of the first connecting plate 800 and the second connecting plate 900, the first rotary joint 100 and the second rotary joint 200 can stably connect the two floating pipes at an angle required for installation. When used at sea, the compact cavity can provide buoyancy so that the entire cage connected by this accessory can float at sea.

[0051] The beneficial effects of this embodiment are that the open and closed ends of the necked section 320, the first welded portion 110, and the second welded portion 210 can make the structure of the entire component more compact and miniaturized, while providing more buoyancy and increasing the floating stability of the marine layout.

[0052] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0053] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A buoyancy tube connection fitting for a marine net cage, characterized in that The device includes a first rotary joint (100) and a second rotary joint (200). The first rotary joint (100) includes a first welding portion (110) and a first rotating portion (120) connected to the first welding portion (110). The second rotary joint (200) includes a second welding portion (210) and a second rotating portion (220) connected to the second welding portion (210). The first rotating portion (120) and the second rotating portion (220) are rotatably connected. Both the first welding portion (110) and the second welding portion (210) are provided with a receiving cavity (300) for accommodating the pipe fitting.

2. The floating pipe connecting fitting for marine cages according to claim 1, characterized in that, It also includes a composite tube pin (400), through which the first rotating part (120) is rotatably connected to the second rotating part (220).

3. A buoyancy tube connection fitting for a marine net cage according to claim 2, characterised in that The first rotating part (120) is provided with a first through hole (500), and the second rotating part (220) is provided with a second through hole (600). The composite tube pin (400) is inserted into the first through hole (500) and the second through hole (600).

4. A buoyancy tube connection fitting for a marine net cage according to claim 3, characterised in that The first rotating part (120) includes a first through-hole post (121) and a second through-hole post (122), and the first through-hole (500) is located within the first through-hole post (121) and the second through-hole post (122), with a gap formed between the first through-hole post (121) and the second through-hole post (122); the second rotating part (220) includes a third through-hole post (221) and a fourth through-hole post (222), and the second through-hole (500) is located within the first through-hole post (121) and the second through-hole post (122), with a gap formed between them; The hole (600) is located inside the third pin hole post (221) and the fourth pin hole post (222), and a gap is formed between the third pin hole post (221) and the fourth pin hole post (222); the first pin hole post (121) is located between the third pin hole post (221) and the fourth pin hole post (222), and the third pin hole post (221) is located between the first pin hole post (121) and the second pin hole post (122).

5. A buoyancy tube connection fitting for a marine net cage according to claim 2, characterised in that The composite tube pin (400) includes a metal layer (410) and a plastic layer (420) that wraps the metal layer (410).

6. A buoyancy tube connection fitting for a marine net cage according to claim 4, characterised in that One end of the composite pipe pin (400) is provided with a flange portion (430), and one end face of the second through pin post (122) and the fourth through pin post (222) are both provided with flange abutment portions (700), and the flange portion (430) and the flange abutment portion (700) are fixedly connected.

7. A buoyancy tube connection fitting for a marine net cage according to claim 2, characterised in that The composite tube pin (400) has a cavity that communicates with the outside, and a reinforcing rib (440) is provided inside the cavity.

8. A floating pipe connecting fitting for marine cages according to any one of claims 1-7, characterized in that, It also includes a first connecting plate (800) and a second connecting plate (900), with the first connecting plate (800) having the first welding part (110) and the first rotating part (120) connected to its two ends respectively, and the second connecting plate (900) having the second welding part (210) and the second rotating part (220) connected to its two ends respectively.

9. A buoyancy tube connection fitting for a marine net cage according to any of claims 1-7, characterised in that The first welded portion (110) and the second welded portion (210) have an open end and a closed end at their two ends, respectively, and the receiving cavity (300) is formed between the open end and the closed end; the first rotating portion (120) is connected to the closed end of the first welded portion (110); the second rotating portion (220) is connected to the closed end of the second welded portion (210).

10. A buoyancy tube connection fitting for a marine net cage according to claim 9, characterised in that The receiving cavity (300) has a flared section (310) and a constricted section (320) in the direction from the open end to the closed end.

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