A connecting structure and a net cage structure

Abstract

The application discloses a connecting structure and a net cage structure, wherein the connecting structure comprises a fixing seat provided with a connecting part for fixed connection with a frame; a first side surface of the fixing seat is provided with an inner concave spherical surface provided with a first opening, and the first opening is communicated with a second side surface of the fixing seat; the second side surface is arranged towards the first side surface; an activity rod is arranged in the first opening; one end of the activity rod is provided with an outer convex spherical surface concentrically arranged with the inner concave spherical surface, and the outer convex spherical surface is slidingly matched with the inner concave spherical surface; the other end of the activity rod is provided with a connecting ring for buckling connection with a rope sleeve of a net cable. According to the technical scheme of the application, the outer convex spherical surface of the activity rod and the inner concave spherical surface of the fixing seat are relatively slid, the relative movement trend between the rope sleeve of the net cable and the connecting ring is converted into the relative movement between the sliding block and the fixing seat, the relative sliding between the rope sleeve and the connecting ring is reduced, the friction and abrasion are avoided, and the service life of the rope sleeve of the net cable is prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of aquaculture, in particular to a connecting structure and a net cage structure. BACKGROUND

[0002] Due to over-exploitation and wanton fishing of the sea, the offshore fishery resources in China have shown a serious recession phenomenon; therefore, the new fishery represented by deep-sea net cage culture has become a hot development field in recent years.

[0003] The deep-sea net cage is a complex system, in which the connection of the netting and the net cage frame has the effect of attaching the netting and closing the culture space; the connecting structure for connecting the netting and the net cage frame is the key to ensure the structural strength of the entire net body; the current connection method mainly adopts the method of welding and fixing the eye plate with the net cage frame, and then using the rope sleeve of the netting to fix the eye plate and the netting. However, the wave load received by the netting is variable due to the complex wave flow conditions in the sea, and the rope sleeve of the netting will repeatedly be subjected to the combined action of tensile, bending, twisting, vibration, extrusion and other stresses, thereby causing the connection part of the rope sleeve of the netting and the eye plate to produce friction due to relative sliding, and the friction causes the eye plate and the rope sleeve of the netting to appear fatigue wear phenomenon, thereby reducing the structural strength of the netting and shortening the service life of the netting. SUMMARY

[0004] The main purpose of the present application is to provide a connecting structure, which aims to solve the problem that the existing netting connecting structure is prone to fatigue wear phenomenon due to friction, thereby reducing the structural strength of the netting and shortening the service life of the netting.

[0005] To achieve the above-mentioned purpose, the connecting structure provided by the present application comprises:

[0006] The fixed seat is provided with a connecting part for fixed connection with the frame; the first side surface of the fixed seat is provided with an inner concave spherical surface, the inner concave spherical surface is provided with a first opening, the first opening is in communication with the second side surface of the fixed seat; the second side surface is arranged towards the first side surface;

[0007] The movable rod is arranged in the first opening; one end of the movable rod is provided with an outer convex spherical surface arranged concentrically with the inner concave spherical surface, the outer convex spherical surface is slidingly fitted on the inner concave spherical surface; the other end of the movable rod is provided with a connecting ring, the connecting ring is used for buckling with the rope sleeve of the netting.

[0008] Preferably, the movable rod further comprises a sliding block, a connecting rod and a locking member; the connecting rod is arranged in the first opening; one end of the connecting rod is detachably connected with the sliding block, and the sliding block is provided with the outer convex spherical surface on the side close to the connecting ring; the other end of the connecting rod is connected with the connecting ring, the connecting ring is provided with a second opening, and the locking member is sleeved on the connecting ring and is in sliding connection with the connecting ring, and the locking member is used for fixedly connecting with the connecting ring and covering the second opening.

[0009] Preferably, the connecting ring comprises a limiting plate and a ring body, one side of the limiting plate is connected with the other end of the connecting rod; the ring body is provided with two open end portions of the third opening, and the two open end portions are respectively fixedly connected with the sides of the limiting plate away from the connecting rod; the width of the limiting plate is greater than the width of the first opening.

[0010] Preferably, the ring body comprises a first ring body and a second ring body, one end of the first ring body is connected with the limiting plate, the other end of the first ring body is bent towards the side close to the limiting plate and forms a bent portion, one end of the second ring body is connected with the limiting plate, and the end face of the other end of the second ring body and the end face of the bent portion form the second opening, and the locking member is in sliding connection with the second ring body; when the locking member covers the second opening, the two ends of the locking member are respectively in threaded connection with the second ring body and the bent portion.

[0011] Preferably, the locking member comprises a sliding sleeve; the sliding sleeve is sleeved on the connecting ring; the sliding sleeve is in sliding connection with the connecting ring;

[0012] The connecting ring is provided with at least a first limiting hole and a second limiting hole, and the first limiting hole and the second limiting hole are respectively located on the two sides of the second opening; the sliding sleeve is provided with a first through hole corresponding to the first limiting hole and a second through hole corresponding to the second limiting hole; and / or,

[0013] The connecting ring is further provided with a third limiting hole, and the third limiting hole is located on the side of the second limiting hole away from the second opening; the first limiting hole, the second limiting hole and the third limiting hole are equidistantly arranged.

[0014] Preferably, the inner wall of the first opening is provided with an inclined surface; the cross-sectional width of the first opening gradually decreases from the second side to the side close to the first side.

[0015] Preferably, the sliding block comprises a spherical cap structure, and the bottom of the spherical cap structure is perpendicular to the connecting rod; the radius of the spherical cap structure is greater than the width of the smallest cross section of the first opening.

[0016] Preferably, a lead layer is arranged on the inner concave spherical surface; and / or,

[0017] A wear-resistant layer is arranged on the outer convex spherical surface, and / or,

[0018] The inner annular surface of the connecting ring is provided with anti-skid lines.

[0019] Preferably, the connecting structure further comprises a first extension plate and a second extension plate, the first extension plate and the second extension plate are located on both sides of the inner concave spherical surface; the first extension plate and the second extension plate are used for fixedly connecting with the frame.

[0020] The application further provides a net cage structure comprising the connecting structure as described above; further comprising a net cable and a steel cage, the net cable is provided with a rope sleeve, the rope sleeve is buckled with the connecting rope; the fixed seat is fixedly connected with the frame of the steel cage

[0021] The technical scheme of the application utilizes the fixed connection between the fixed seat and the frame to fix the connecting structure on the frame; the outer convex spherical surface of the movable rod is matched with the inner concave spherical surface of the fixed seat, the end of the movable rod away from the outer convex spherical surface passes through the first opening and is connected with the connecting ring, the connecting ring is used for buckling with the rope sleeve of the net cable; when the net cable is subjected to the external force load applied by the wave, the connecting ring connected with the rope sleeve of the net cable drives the movable rod to move, so that the outer convex spherical surface of the movable rod and the inner concave spherical surface of the fixed seat slide relatively, the relative movement trend between the rope sleeve of the net cable and the connecting ring is converted into the relative movement between the sliding block and the fixed seat, so as to reduce the friction between the rope sleeve of the net cable and the connecting ring, and further reduce the abrasion of the rope sleeve of the net cable caused by the friction; under the connecting strength of the connecting structure, the service life of the net cable is prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical scheme in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only show some embodiments of the application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of the drawings shown.

[0023] Figure 1 It is a structural schematic diagram of an embodiment of the connecting structure of the application.

[0024] Figure 2 It is a structural schematic diagram of the movable state of the movable rod of an embodiment of the connecting structure of the application.

[0025] Figure 3 It is a structural schematic diagram of the movable state of the movable rod of an embodiment of the connecting structure of the application.

[0026] Figure 4 As Figure 1 The structure diagram of the movable rod.

[0027] Figure 5 As Figure 1 The structure diagram of the movable rod.

[0028] BRIEF DESCRIPTION OF DRAWINGS

[0029]

[0030]

[0031] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0033] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement condition, etc. between components in a certain posture, and if the certain posture changes, the directional indications also change accordingly.

[0034] In addition, if the embodiments of the present application involve descriptions of “first”, “second”, etc., the descriptions of “first”, “second”, etc. are only for description purposes, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by “first” and “second” can explicitly or implicitly include at least one of the features. In addition, “and / or” or “and / or” appearing throughout the text means that the three parallel schemes are included, for example, “A and / or B” includes A scheme, or B scheme, or A and B are satisfied at the same time. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of those skilled in the art, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope of the present application.

[0035] The present application provides a connecting structure.

[0036] Referring to Figures 1 to 5In an embodiment of the present application, the connecting structure comprises a fixed seat 1 and a movable rod 2. The fixed seat 1 is provided with a connecting part for fixed connection with the frame. The first side of the fixed seat 1 is provided with an inner concave spherical surface 11. The inner concave spherical surface 11 is provided with a first opening 12. The first opening 12 is in communication with the second side of the fixed seat 1. The second side is arranged towards the first side. The movable rod 2 is arranged in the first opening 12. One end of the movable rod 2 is provided with an outer convex spherical surface 21 arranged concentrically with the inner concave spherical surface 11. The outer convex spherical surface 21 is slidingly fitted on the inner concave spherical surface 11. The other end of the movable rod 2 is provided with a connecting ring 22 for buckling connection with the rope sleeve of the net cable.

[0037] In the above structure, the fixed seat 1 is fixedly connected with the frame, so that the connecting structure is fixed on the frame. The outer convex spherical surface 21 of the movable rod 2 is matched with the inner concave spherical surface of the fixed seat 1. The end of the movable rod 2 away from the outer convex spherical surface 21 is arranged out of the first opening 12 and is connected with the connecting ring 22. The connecting ring 22 is used for buckling connection with the rope sleeve of the net cable. When the net cable is subjected to external force load applied by waves, the connecting ring 22 connected with the rope sleeve of the net cable drives the movable rod 2 to move, so that the outer convex spherical surface 21 of the movable rod 2 and the inner concave spherical surface 11 of the fixed seat 1 slide relatively. The relative movement trend between the rope sleeve and the connecting ring 22 is converted into the relative movement between the sliding block 23 and the fixed seat 1, so as to reduce the friction between the rope sleeve and the connecting ring 22. In turn, the wear of the rope sleeve caused by the friction is reduced. The connecting structure can prolong the service life of the net cable while ensuring the connection strength between the net cable and the frame.

[0038] Specifically, the second side is arranged towards the first side. The second side and the first side are located at different sides of the fixed seat 1. That is, the first side and the second side can be directly opposite, and the first side and the second side have a certain deflection angle. The connecting part of the fixed seat 1 and the pile of the frame are fixed by welding, so that the connecting structure is fixed on the frame. The connecting part is one side of the fixed part. The side does not include the side of the fixed seat 1 provided with the inner concave spherical surface 11 and the side provided with the first opening 12. Figure 1

[0039] Preferably, the movable rod 2 further comprises a sliding block 23, a connecting rod 24 and a locking member 25. The connecting rod 24 is arranged in the first opening 12. The sliding block 23 is detachably connected with one end of the connecting rod 24. The side of the sliding block 23 close to the connecting ring 22 is provided with the outer convex spherical surface 21. The connecting ring 22 is connected with the other end of the connecting rod 24. The connecting ring 22 is provided with a second opening 26. The locking member 25 is sleeved on the connecting ring 22 and is slidingly connected with the connecting ring 22. The locking member 25 is used for fixed connection with the connecting ring 22 and covers the second opening 26.​

[0040] In the structure, the sliding block 23 is provided with an outer concave spherical surface which is matched with the inner concave spherical surface 11 of the fixed seat 1, and the two ends of the connecting rod 24 are respectively connected with the sliding block 23 and the connecting ring 22, and the connecting ring 22 is used to connect the rope sleeve of the netting cable; the locking member 25 is added to facilitate the connection of the connecting structure with the rope sleeve of the netting cable, and the installation and use process of the connecting structure is as follows: the locking member 25 is slid along the connecting ring 22 and the second opening 26 is exposed, the rope sleeve of the netting cable is clamped into the connecting ring 22 through the second opening 26, then the locking member 25 is slid and covers the second opening 26, and finally the locking member 25 is locked with the connecting ring 22 to close the second opening 26, so as to avoid the rope sleeve of the netting cable from falling off the connecting ring 22; when the netting cable is subjected to external force load applied by waves, the netting cable changes in shape under the stress of stretching, bending, twisting, vibration, extrusion and the like, and the rope sleeve of the netting cable pulls the connecting ring 22, so that the connecting ring 22 drives the connecting rod 24 to swing or move relative to the fixed seat 1; in the swinging process of the movable rod 2, the sliding block 23 slides relative to the inner concave spherical surface 11, and the swinging of the movable rod 2 reduces the relative sliding of the connecting part of the rope sleeve of the netting cable and the connecting ring 22, thereby avoiding the fatigue wear of the rope sleeve of the netting cable and the breakage of the rope sleeve of the netting cable; at the same time, the netting cable is prevented from being pulled and torn, and the fish is prevented from escaping.

[0041] Preferably, the inner ring surface of the connecting ring 22 is provided with anti-skid lines 222d. In the swinging process of the movable rod 2, the anti-skid lines 222d reduce the relative sliding of the connecting part of the rope sleeve of the netting cable and the connecting ring 22, and convert the relative movement between the rope sleeve of the netting cable and the connecting ring 22 into the relative movement between the sliding block 23 and the fixed seat 1, thereby reducing the mutual friction between the rope sleeve of the netting cable and the connecting ring 22, delaying the breakage of the rope sleeve of the netting cable, and prolonging the service life of the netting cable. Specifically, the anti-skid lines 222d include a plurality of protrusions.

[0042] Preferably, the connecting ring 22 includes a limiting plate 221 and a ring body, one side of the limiting plate 221 is connected with the other end of the connecting rod 24; the ring body is provided with two open end portions of a third opening 223 which are respectively fixedly connected with the side of the limiting plate 221 away from the connecting rod 24; and the width of the limiting plate 221 is greater than the width of the first opening 12.

[0043] In the structure, one end of the connecting rod 24 passes through the first opening 12 and is fixedly connected with the limiting plate 221, in the process that the movable rod 2 is driven and moves, the sliding block 23 is separated from the inner concave spherical surface 11, the width of the sliding block 23 is greater than the width of the first opening 12, and the width of the limiting plate 221 is greater than the width of the first opening 12, so that the sliding block 23 or the limiting plate 221 cannot pass through the first opening 12, and the movable rod 2 is separated from the fixed seat 1; specifically, the limiting plate 221 and the opening end of the ring body provided with the third opening 223 are fixed by welding, so as to increase the connection strength of the ring body and the limiting plate 221.

[0044] Preferably, the connecting rod 24, the limiting plate 221 and the ring body are an integral structure. In the structure, the risk of falling off of the connecting rod 24, the connecting rod and the ring body from each other can be reduced, and the service life of the connection structure is improved.

[0045] Preferably, the ring body comprises a first ring body 222a and a second ring body 222b, one end of the first ring body 222a is connected with the limiting plate 221, the other end of the first ring body 222a is bent towards the side close to the limiting plate 221 and forms a bent part 222c, one end of the second ring body 222b is connected with the limiting plate 221, and the end face of the other end of the second ring body 222b and the end face of the bent part 222c form the second opening 26, and the locking piece 25 is in sliding connection with the second ring body 222b; when the locking piece 25 covers the second opening 26, the locking piece 25 is in threaded connection with the second ring body 222b and the bent part 222c respectively.

[0046] In the structure, the inner ring surface of the bent part of the first ring body 222a is provided with the anti-skid pattern, specifically, the anti-skid pattern comprises a plurality of anti-skid protrusions, so as to reduce the relative sliding between the rope sleeve of the net and the first ring body 222a; the length of the locking piece 25 is greater than the opening width of the second opening 26, so that the locking piece 25 can completely cover the second opening 26, and after the second opening 26 is locked, the locking piece 25 makes the first ring body 222a, the second ring body 222b and the limiting plate 221 form a closed connection ring 22.

[0047] Preferably, the locking piece 25 comprises a sliding sleeve; the sliding sleeve is sleeved on the connection ring 22; the sliding sleeve is in sliding connection with the connection ring 22; the connection ring 22 is provided with at least a first limiting hole 224 and a second limiting hole 225, the first limiting hole 224 and the second limiting hole 225 are located on the two sides of the second opening 26 respectively; the sliding sleeve is provided with a first through hole corresponding to the first limiting hole 224, and the sliding sleeve is provided with a second through hole corresponding to the second limiting hole 225.

[0048] In the structure, the connecting structure further comprises a plurality of screws, the number of the screws being the same as that of the limiting holes; a sliding sleeve is sleeved on the connecting ring 22, the hole diameter of the sliding sleeve being larger than the cross-sectional width of the connecting ring 22, so that the sliding sleeve can slide relative to the connecting ring 22; the first limiting hole 224 is arranged on the first ring body 222a and is located at the locking state, one of the screws passes through the first limiting hole 224 and the first through hole, so that the sliding sleeve and the first ring body 222a are connected, and the other screw passes through the second limiting hole 225 and the second through hole, so that the sliding sleeve and the second ring body 222b are connected; in addition, the screws can be welded and fixed with the sliding sleeve, so as to enhance the sealing property of the connecting ring 22 and avoid that the rope sleeve of the netting cable is separated from the connecting ring from the second opening 26.

[0049] Preferably, the connecting ring 22 is further provided with a third limiting hole, the third limiting hole being located on the side of the second limiting hole 225 away from the second opening 26; the first limiting hole 224, the second limiting hole 225 and the third limiting hole are equidistantly arranged.

[0050] In the structure, at the locking state, the locking piece 25 slides along the second ring and makes the second opening 26 leak, one of the screws passes through the second limiting hole 225 and the first through hole, and the other screw passes through the third limiting hole 226 and the second through hole, so that the sliding sleeve and the second ring body 222b are connected, the sliding sleeve is prevented from sliding, and the rope sleeve of the netting cable is facilitated to be clamped into the connecting ring 22 from the second opening 26.

[0051] Preferably, the inner wall of the first opening 12 is provided with an inclined surface 121; the cross-sectional width of the first opening 12 gradually decreases from the second side to the side close to the first side.

[0052] In the structure, the first opening 12 has the function of limiting the swing angle of the movable rod 2; when the swing amplitude of the swing rod is large, the connecting rod 24 abuts against the inner wall of the first opening 12 to limit the swing amplitude of the movable rod 2. Specifically, the inclination angle of the inclined surface 121 is 15°-25°. The inclined surface 121 is provided with a wear-resistant layer to improve the wear resistance of the inclined surface 121.

[0053] Preferably, the sliding block 23 comprises a spherical cap structure, the bottom of the spherical cap structure being perpendicular to the connecting rod 24; the radius of the spherical cap structure is greater than the width of the minimum cross section of the first opening 12.

[0054] In the structure, the radius of the spherical cap structure is greater than the width of the minimum cross section of the first opening 12, so that the sliding block 23 is prevented from being separated from the first opening 12 when the movable rod 2 swings and the connecting rod 24 abuts against the inclined surface 121.

[0055] Preferably, the movable rod 2 further comprises a nut 27, the sliding block 23 is provided with a threaded hole, one end of the connecting rod 24 is threadedly connected with the threaded hole, and the other end of the connecting rod 24 is threadedly connected with the nut 27 through the threaded hole.

[0056] In the above structure, the end of the connecting rod 24 connected with the sliding block 23 is provided with external threads, the connecting rod 24 is threadedly connected with the threaded hole of the sliding block 23, the part of the connecting rod 24 penetrating through the sliding block 23 is threadedly connected with the nut 27, and the nut 27 is used for locking the connecting rod 24 and the sliding block 23; specifically, the nut 27 comprises a rust-proof nut 27, which avoids rusting of the nut 27 in water and affects the dismounting and connecting stability between the nut 27 and the connecting rod 24.

[0057] Preferably, the connecting structure further comprises a first extension plate 3 and a second extension plate 4, the first extension plate 3 and the second extension plate 4 are located on both sides of the inner concave spherical surface; and the first extension plate 3 and the second extension plate 4 are used for fixedly connecting with the frame.

[0058] In the above structure, the first extension plate 3 and the second extension plate 4 are located on both sides of the inner concave spherical surface, when the sliding block 23 is separated from the inner concave spherical surface 11, the first extension plate 3 and the second extension plate 4 have a constrained movement space, which facilitates the sliding block 23 to be reset as soon as possible and re-enter the inner concave spherical surface 11.

[0059] Preferably, the inner concave spherical surface 11 is provided with a lead layer; and / or the outer convex spherical surface 21 is provided with a wear-resistant layer.

[0060] In the above structure, the lead layer is additionally provided on the inner concave spherical surface 11 to reduce the sliding friction between the inner concave spherical surface 11 and the outer convex spherical surface 21 and reduce the abrasion between the sliding block 23 and the inner concave spherical surface 11 caused by friction; the wear-resistant layer is additionally provided on the outer convex spherical surface 21 to reduce the surface roughness of the sliding block 23, which also has the effect of reducing the sliding friction between the inner concave spherical surface 11 and the outer convex spherical surface 21, and the wear-resistant layer also has the effects of preventing corrosion of the sliding block 23 and improving the wear resistance of the sliding block 23. The wear-resistant layers of the anti-skid block and the inclined surface 121 can be tungsten carbide coatings or ceramic coatings.

[0061] The technical scheme of the present application utilizes the fixed seat 1 and the frame fixed connection, so that the connecting structure is fixed on the frame; the outer convex spherical surface 21 of the movable rod 2 is matched with the inner concave spherical surface of the fixed seat 1, the end of the movable rod 2 away from the outer convex spherical surface 21 passes through the first opening 12 and is connected with the connecting ring 22, and the connecting ring 22 is used for being connected with the rope sleeve of the net cable; when the net cable is subjected to the external force load applied by the wave, the connecting ring 22 connected with the rope sleeve of the net cable drives the movable rod 2 to move, so that the outer convex spherical surface 21 of the movable rod 2 and the inner concave spherical surface 11 of the fixed seat 1 relatively slide, the relative movement trend between the rope sleeve of the net cable and the connecting ring 22 is converted into the relative movement between the sliding block 23 and the fixed seat 1, so as to reduce the friction between the rope sleeve of the net cable and the connecting ring 22, and further reduce the abrasion of the rope sleeve of the net cable caused by the friction; the connecting structure can prolong the service life of the net cable under the condition of ensuring the connection strength of the net cable and the frame.

[0062] The present application also provides a net cage structure, which comprises a connecting structure, and the specific structure of the connecting structure is referred to the above-mentioned embodiments. Since the net cage structure adopts all the technical schemes of the above-mentioned embodiments, it has all the beneficial effects brought by the technical schemes of the above-mentioned embodiments, which will not be repeated here. The net cage structure further comprises a net cable and a steel cage, the net cable is provided with a rope sleeve, the rope sleeve is connected with the connecting rope, and the fixed seat is fixedly connected with the frame of the steel cage.

[0063] The above-mentioned is only the preferred embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structural transformation, direct / indirect application in other related technical fields under the inventive concept of the present application, or the contents of the present application specification and drawings are included in the patent protection scope of the present application.

Claims

1. A net cage structure, characterized by The net cage structure comprises a connecting structure, a net cable and a steel box, wherein the connecting structure comprises: a fixed seat provided with a connecting part for fixed connection with the frame of the steel box; a first side of the fixed seat is provided with an inner concave spherical surface, the inner concave spherical surface is provided with a first opening, the first opening is in communication with a second side of the fixed seat; the second side is arranged towards the first side; a movable rod arranged in the first opening; one end of the movable rod is provided with an outer convex spherical surface arranged concentrically with the inner concave spherical surface, the outer convex spherical surface is slidingly fitted on the inner concave spherical surface; the other end of the movable rod is provided with a connecting ring for buckling with the rope sleeve of the net cable; the movable rod further comprises a sliding block, a connecting rod and a locking member; the connecting rod is arranged in the first opening; one end of the connecting rod is detachably connected with the sliding block, the side of the sliding block close to the connecting ring is provided with the outer convex spherical surface; the other end of the connecting rod is connected with the connecting ring, the connecting ring is provided with a second opening, the locking member is sleeved on the connecting ring and is slidingly connected with the connecting ring, the locking member is used for fixed connection with the connecting ring and covers the second opening; the inner ring surface of the connecting ring is provided with anti-skid lines; when the net cable is subjected to external force load applied by waves, the connecting ring connected with the rope sleeve of the net cable drives the movable rod to move, so that the outer convex spherical surface of the movable rod and the inner concave spherical surface of the fixed seat produce relative sliding, the relative movement trend between the rope sleeve of the net cable and the connecting ring is converted into relative movement between the sliding block and the fixed seat, so as to reduce the friction between the rope sleeve and the connecting ring; in the swinging process of the movable rod, the anti-skid lines are used for reducing the relative sliding between the connecting part of the rope sleeve of the net cable and the connecting ring, so as to convert the relative movement trend between the rope sleeve of the net cable and the connecting ring into relative movement between the sliding block and the fixed seat; the locking member comprises a sliding sleeve; the sliding sleeve is sleeved on the connecting ring; the sliding sleeve is slidingly connected with the connecting ring; the connecting ring is provided with at least a first limiting hole and a second limiting hole, the first limiting hole and the second limiting hole are respectively located on the two sides of the second opening; the sliding sleeve is provided with a first through hole corresponding to the first limiting hole, and is provided with a second through hole corresponding to the second limiting hole; the connecting ring is further provided with a third limiting hole, the third limiting hole is located on the side of the second limiting hole away from the second opening; the first limiting hole, the second limiting hole and the third limiting hole are equidistantly arranged.

2. A cage structure according to claim 1, c h a r a c t e r i s e d in that the connecting ring comprises a limiting plate and a ring body, one side of the limiting plate is connected with the other end of the connecting rod; the two side opening ends of the ring body are fixedly connected with the sides of the limiting plate away from the connecting rod; the width of the limiting plate is greater than the width of the first opening.

3. A cage structure according to claim 2, wherein The ring body comprises a first ring body and a second ring body, one end of the first ring body is connected with the limiting plate, the other end of the first ring body is bent towards the side close to the limiting plate and forms a bent portion, one end of the second ring body is connected with the limiting plate, the end face of the other end of the second ring body and the end face of the bent portion form the second opening, and the locking member is in sliding connection with the second ring body; when the locking member covers the second opening, the two ends of the locking member are in threaded connection with the second ring body and the bent portion respectively.

4. A cage structure according to any one of claims 1 to 3, c h a r a c t e r i s e d in that An inclined surface is arranged on the inner wall of the first opening; and the cross-sectional width of the first opening gradually decreases from the second side to the side close to the first side.

5. A cage structure according to claim 4, wherein The sliding block is in a spherical cap structure, the bottom of the spherical cap structure is perpendicular to the connecting rod; and the radius of the spherical cap structure is greater than the minimum cross-sectional width of the first opening.

6. A cage structure according to any one of claims 1 to 3, wherein A lead layer is arranged on the inner concave spherical surface; and / or A wear-resistant layer is arranged on the outer convex spherical surface.

7. A cage structure according to any one of claims 1 to 3, c h a r a c t e r i s e d in that The connecting structure further comprises a first extension plate and a second extension plate, the first extension plate and the second extension plate are arranged on both sides of the inner concave spherical surface; and the first extension plate and the second extension plate are used for fixed connection with the frame.

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