Connecting device and breakwater

Abstract

The utility model belongs to the technical field of breakwaters, and discloses a connecting device and a breakwater. The connecting device comprises a first connecting structure, a second connecting structure and a self-locking structure, the first connecting structure comprises a first connecting seat, a clamping groove is formed in the first connecting seat, an opening is formed in one end of the clamping groove, and the second connecting structure comprises a second connecting seat and a clamping piece fixedly arranged on the second connecting seat. The clamping piece is clamped in the clamping groove and can slide along the clamping groove, and the self-locking structure is used for opening or blocking the opening. According to the connecting device, connection can be completed by rotating the first connecting base and the second connecting base, the connecting efficiency is high, the clamping piece can slide along the clamping groove, rotation between the first connecting base and the second connecting base in the axial direction is released, then the load of the connecting device is reduced, and the service life of the connecting device is prolonged; and the clamping piece of the self-locking structure is limited in the clamping groove, so that failure of the connecting device can be avoided, and the stability in the using process is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to breakwater technical field especially connecting device and breakwater. BACKGROUND

[0002] Breakwater is a kind of protective structure widely used in marine and lake and other water areas, has the function of wave dissipation, ensure that the working water area has enough stable water surface environment. In sheltering deepwater harbor wharf water area, as temporary berthing wharf for ship, sheltering aquaculture, seashore bath, offshore construction site, offshore mobile wharf for military and as offshore disaster prevention emergency wave protection measure etc. Field has wide application prospect. The type of breakwater has fixed breakwater, floating breakwater, compared with traditional fixed breakwater, floating breakwater has the advantages such as low engineering cost, simple construction, convenient arrangement, therefore, in recent years, it is concerned.

[0003] At present, the connection form between floating breakwater modules has mooring connection, rubber ring connection and other ways, wherein the mooring connection form needs to moor each module, the cost is higher, and the position of wave absorbing module is not easy to control in use, and collision problem is easy to produce;The service life of rubber ring connection form is lower due to high temperature, high humidity, high salt and other adverse sea conditions, the maintenance cost is high in later period, the hinged connector occupies larger space, and is not suitable for small floating body. At the same time, the length of breakwater module is much larger than the width and height, has the possibility of rotating movement, which also brings challenges to the stability of connecting device.

[0004] Therefore, a connecting device and breakwater are needed to solve the above problems. INVENTION CONTENTS

[0005] The utility model aims at providing a kind of connecting device and breakwater, this connecting device can reduce the connection difficulty of breakwater module, and can release the freedom of rotation around axis between adjacent two breakwater modules, effectively reduce load, improve service life.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] Connecting device, the connecting device includes:

[0008] First connecting structure, the first connecting structure includes first connecting seat, the first connecting seat is provided with clamping slot, the clamping slot extends along the circumference of the first connecting seat, one end of the clamping slot is provided with opening;

[0009] Second connecting structure, the second connecting structure includes second connecting seat and clamping piece, the clamping piece is fixedly arranged on the second connecting seat, at least part of the clamping piece is clamped in the clamping slot and can slide along the clamping slot, the clamping piece can be separated from the clamping slot through the opening.

[0010] A self-locking structure is arranged on the first connecting seat, and is used for opening or blocking the opening.

[0011] As an optional technical solution, the clamping groove comprises a limiting groove and a guide groove, the limiting groove is communicated with the outside through the guide groove, and a section of the clamping groove is in a T-shaped structure; the clamping piece comprises a limiting part and a connecting part which are fixedly connected, the connecting part is fixedly connected to the second connecting seat, the limiting part is slidingly arranged in the limiting groove, and an end face of the limiting part close to the second connecting seat can abut against an end face of the limiting groove close to the second connecting seat.

[0012] As an optional technical solution, the end face of the limiting part close to the second connecting seat and the end face of the limiting groove close to the second connecting seat both have a certain slope.

[0013] As an optional technical solution, a bottom surface of the limiting groove is a first slope, so that a depth of the limiting groove gradually decreases along a direction away from the opening; an end face of the limiting part away from the second connecting seat is a second slope, and the first slope and the second slope are arranged in a spaced manner.

[0014] As an optional technical solution, the limiting part and / or the connecting part are in a cylindrical structure.

[0015] As an optional technical solution, the self-locking structure comprises a limiting block and an elastic piece, the first connecting seat is provided with an accommodating groove, the accommodating groove is communicated with the opening, two ends of the elastic piece are connected to the limiting block and a groove bottom of the accommodating groove respectively, the elastic piece makes the limiting block stop at a position for blocking the opening, and exerting force on the elastic piece can make the elastic piece be accommodated in the accommodating groove to open the opening.

[0016] As an optional technical solution, the self-locking structure further comprises a cable, one end of the cable is fixed, and the other end of the cable is connected to the limiting block, and exerting force on the cable can overcome the elastic force of the elastic piece to make the limiting block be accommodated in the accommodating groove.

[0017] As an optional technical solution, an end of the limiting block towards the clamping piece is provided with a notch, and the notch can abut against the clamping piece.

[0018] As an optional technical scheme, the plurality of clamping grooves are distributed on the end face of the first connecting seat in the circumferential direction of the first connecting seat, the plurality of clamping pieces are distributed on the end face of the second connecting seat in the circumferential direction of the second connecting seat, and the plurality of clamping pieces are correspondingly and slidably arranged in the plurality of clamping grooves.

[0019] The utility model discloses still uses following technical scheme:

[0020] The breakwater comprises a first floating body and a second floating body, and further comprises the connecting device as described above, which is used for connecting the first floating body and the second floating body.

[0021] The utility model discloses beneficial effect:

[0022] The utility model discloses a connecting device, the connecting device includes first connecting structure, second connecting structure and self locking structure, and first connecting structure includes first connecting seat, is provided clamping groove on first connecting seat, and the one end of clamping groove is provided with opening, and second connecting structure includes second connecting seat and the clamping piece of fixed setting on second connecting seat, and the clamping piece is clamped in clamping groove and can slide along clamping groove, and self locking structure is used to open or block opening. This connecting device when connecting, first make the clamping piece from the opening into the clamping groove, and rotate first connecting seat and second connecting seat can make first connecting seat and second connecting seat connect convenient, and the clamping piece can slide along the clamping groove, release the rotation of first connecting seat and second connecting seat between each other around the shaft, further reduce the load of connecting device, improve the service life of connecting device, and the opening can be opened in the installation process by the self locking structure, and the opening is closed after completing installation, and further limit the clamping piece in the clamping groove, can avoid the failure of connecting device, improve the stability in the use process.

[0023] The utility model discloses still disclose a breakwater, and the breakwater includes first floating body and second floating body, and further includes above -mentioned connecting device, and connecting device is used for connecting first floating body and second floating body. This breakwater is provided with above -mentioned connecting device, not only high connecting efficiency, can also allow first floating body and second floating body have a certain range rotation, further reduce the load impact that connecting device receives, and further improve the service life. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is the side view schematic drawing of the connecting state of the connecting device of the utility model embodiment;

[0025] Figure 2 It is the top view schematic drawing of the connecting state of the connecting device of the utility model embodiment;

[0026] Figure 3 Figure 6 is a side view schematic diagram of the disconnecting state of the connecting device of the embodiment of the utility model;

[0027] Figure 4 Figure 5 is a side view schematic diagram of the connecting initial state of the connecting device of the embodiment of the utility model;

[0028] Figure 5 Figure 4 is a side view schematic diagram of the limiting block being in the opening state of the embodiment of the utility model.

[0029] In the drawing:

[0030] 10, first connecting seat; 11, clamping groove; 111, limiting groove; 1111, first inclined surface; 112, guide groove; 13, opening; 14, accommodating groove;

[0031] 20, second connecting seat; 21, clamping piece; 211, limiting part; 2111, second inclined surface; 212, connecting part;

[0032] 31, limiting block; 311, notch; 32, elastic piece; 33, cable; 34, pulley. DETAILED DESCRIPTION

[0033] The utility model will be further explained in detail in combination with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the utility model and not limited to the utility model. In addition, it should be noted that, in order to facilitate the description, only the part related to the utility model is shown in the drawings and not all structures.

[0034] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0035] In the utility model, unless another definite provision and limitation, first feature is "on" or "under" second feature can include that first and second features are in direct contact, also can include that first and second features are not in direct contact but contact through other feature between them. Moreover, first feature "on", "above" and "upper surface of" second feature includes that first feature is directly above and obliquely above second feature, or only indicates that horizontal height of first feature is higher than second feature. First feature "under", "below" and "under surface of" second feature includes that first feature is directly below and obliquely below second feature, or only indicates that horizontal height of first feature is less than second feature.

[0036] In the description of the present embodiment, the terms "upper", "lower", "right", "left", "horizontal", "vertical", and other orientation or position relations are based on the orientation or position relations shown in the drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second" are only used to distinguish in the description, and have no special meaning.

[0037] As Figures 1 to 5As shown, the embodiment provides a connecting device, which comprises a first connecting structure, a second connecting structure and a self-locking structure. The first connecting structure comprises a first connecting seat 10, the first connecting seat 10 is provided with a clamping groove 11, the clamping groove 11 extends along the circumference of the first connecting seat 10, and one end of the clamping groove 11 is provided with an opening 13. The second connecting structure comprises a second connecting seat 20 and a clamping piece 21, the clamping piece 21 is fixedly connected with the second connecting seat 20, at least part of the clamping piece 21 is clamped in the clamping groove 11 and can slide along the clamping groove 11, and the clamping piece 21 can be separated from the clamping groove 11 through the opening 13. The self-locking structure is arranged on the first connecting seat 10, and is used for opening or blocking the opening 13. Specifically, in the embodiment, the connecting device is used for connecting two connected members, wherein the first connecting seat 10 and the second connecting seat 20 are respectively connected to the two connected members. When the first connecting seat 10 and the second connecting seat 20 are connected, the clamping piece 21 on the second connecting seat 20 slides from the opening 13 into the clamping groove 11, the self-locking structure can block the opening 13, so that the clamping piece 21 can only slide in the clamping groove 11, thereby connecting the first connecting seat 10 and the second connecting seat 20. Since the clamping piece 21 can slide along the clamping groove 11, the first connecting seat 10 and the second connecting seat 20 can rotate around the axis direction by a certain angle, which improves the freedom of the first connecting seat 10 and the second connecting seat 20 around the axis direction, thereby improving the freedom of the two connected members. When the two connected members rotate relative to each other, the impact on the connecting device is reduced, the service life of the connecting device is improved, and the installation efficiency is improved. When installing, the first connecting seat 10 and the second connecting seat 20 can be rotated to complete the installation, which is convenient and efficient. By arranging the self-locking structure, the opening 13 can be opened during installation to facilitate installation, and the opening 13 is closed after installation is completed, thereby limiting the clamping piece 21 in the clamping groove 11 to effectively prevent the clamping piece 21 from coming out, thereby ensuring the connection stability of the first connecting seat 10 and the second connecting seat 20, avoiding the failure of the connecting device, and improving the stability and safety during use.

[0038] Further, as Figure 2As shown, the clamping grooves 11 on the first connecting seat 10 are provided with a plurality of clamping grooves 11 which are evenly distributed on the end face of the first connecting seat 10 along the circumferential direction of the first connecting seat 10. The clamping pieces 21 on the second connecting seat 20 are provided with a plurality of clamping pieces 21 which are evenly distributed on the end face of the second connecting seat 20 along the circumferential direction of the second connecting seat 20. The plurality of clamping pieces 21 are correspondingly and slidably arranged in the plurality of clamping grooves 11. Specifically, in the embodiment, the clamping grooves 11 and the clamping pieces 21 are both provided with four clamping grooves 11 and four clamping pieces 21 which are correspondingly and slidably connected. This arrangement increases the connecting points of the first connecting seat 10 and the second connecting seat 20 by increasing the clamping grooves 11 and the clamping pieces 21, thereby ensuring the stability of the connection between the first connecting seat 10 and the second connecting seat 20. The four clamping grooves 11 are evenly distributed on the end face of the first connecting seat 10 along the circumferential direction of the first connecting seat 10, and the four clamping pieces 21 are evenly distributed on the end face of the second connecting seat 20 along the circumferential direction of the second connecting seat 20, which can balance the arrangement of the connecting points between the first connecting seat 10 and the second connecting seat 20, so that the pulling force on the first connecting seat 10 and the second connecting seat 20 is uniform, thereby avoiding the problem of poor connection stability caused by uneven force.

[0039] Specifically, in the embodiment, the four clamping grooves 11 are sequentially arranged along the circumferential direction of the first connecting seat 10, which can ensure that the position of the opening 13 is always on the same side of the clamping groove 11, thereby ensuring the consistency of the rotation direction when the first connecting seat 10 and the second connecting seat 20 are installed, and ensuring the normal connection of the first connecting seat 10 and the second connecting seat 20.

[0040] In another embodiment, the number of clamping grooves 11 and clamping pieces 21 can be specifically set according to actual use, which can be two, three, five or even more, and will not be repeated here.

[0041] Further, please refer to Figure 1 and Figure 3The clamping groove 11 comprises a limiting groove 111 and a guide groove 112, the limiting groove 111 is communicated with the outside through the guide groove 112, and the cross section of the clamping groove 11 is in T-shaped structure; the clamping piece 21 comprises a limiting part 211 and a connecting part 212 which are fixedly connected, the connecting part 212 is fixedly connected to the second connecting seat 20, the limiting part 211 is slidingly arranged in the limiting groove 111, and the end face of the limiting part 211 close to the second connecting seat 20 can abut against the end face of the limiting groove 111 close to the second connecting seat 20. Specifically, in the embodiment, the width of the limiting groove 111 is greater than the width of the guide groove 112, so that the cross section of the clamping groove 11 is in T-shaped structure, the limiting part 211 of the clamping piece 21 is slidingly arranged in the limiting groove 111, the connecting part 212 is slidingly arranged in the guide groove 112, and the end face of the limiting part 211 close to the second connecting seat 20 can abut against the end face of the limiting groove 111 close to the second connecting seat 20. This arrangement can ensure that the clamping part is always limited in the limiting groove 111, and the connection stability of the first connecting seat 10 and the second connecting seat 20 is ensured.

[0042] Specifically, in the embodiment, the number of the limiting groove 111 and the guide groove 112 is one, and correspondingly, the number of the limiting part 211 and the connecting part 212 of the clamping piece 21 is also one, the limiting part 211 is slidingly arranged in the limiting groove 111, and the connecting part 212 is slidingly arranged in the guide groove 112. In another embodiment, the number of the limiting groove 111 can also be several, and the adjacent two limiting grooves 111 are communicated through the guide groove 112. The limiting part 211 of the clamping piece 21 can also be provided with several limiting parts 211, and the adjacent two limiting parts 211 are connected through the connecting part 212. The several limiting parts 211 are slidingly arranged in the several limiting grooves 111 one by one. This arrangement can further improve the connection stability, but the processing difficulty is relatively large.

[0043] Further, please refer to Figure 3 and Figure 5 The end face of the limiting part 211 close to the second connecting seat 20 and the end face of the limiting groove 111 close to the second connecting seat 20 both have a certain slope. Specifically, in the embodiment, this arrangement increases the contact area of the limiting part 211 and the limiting groove 111, reduces stress concentration, avoids the knocking of the first connecting seat 10 and the second connecting seat 20 due to waves, and further prevents the clamping piece 21 from being broken, thereby improving the service life.

[0044] Further, please refer to Figure 3 and Figure 5, the bottom surface of the limiting groove 111 is a first inclined surface 1111, so that the depth of the limiting groove 111 gradually decreases along the direction away from the opening 13; the end surface of the limiting portion 211 away from the second connecting seat 20 is a second inclined surface 2111, and the first inclined surface 1111 and the second inclined surface 2111 are matched and spaced. Specifically, in the embodiment, the first inclined surface 1111 makes the limiting groove 111 as a whole have a certain slope, the end surface of the limiting portion 211 away from the second connecting seat 20 is a second inclined surface 2111, the second inclined surface 2111 also has a certain slope, and the inclination of the first inclined surface 1111 and the second inclined surface 2111 is the same, which can increase the friction when the limiting portion 211 slides along the limiting groove 111, and has a certain limiting effect on the rotation between the first connecting seat 10 and the second connecting seat 20, and improves the safety during use. Specifically, in the embodiment, the second inclined surface 2111 and the first inclined surface 1111 are spaced, and the maximum gap between the first inclined surface 1111 and the second inclined surface 2111 is generally not more than the thickness of the limiting portion 211, which can improve the stability during use and avoid unstable connection due to large distance.

[0045] Further, please refer to Figure 2 , the limiting portion 211 and / or the connecting portion 212 are in a cylindrical structure. Specifically, in the embodiment, the limiting portion 211 and the connecting portion 212 are in a cylindrical structure, and the cross-sectional area of the limiting portion 211 is greater than that of the connecting portion 212, so that the clamping piece 21 as a whole is in a circular truncated cone structure. This structure is simple to process, and has a small contact area with the clamping groove 11 when sliding in the clamping groove 11, thereby reducing the risk of clamping and ensuring the convenience during use.

[0046] In another embodiment, the limiting portion 211 and the connecting portion 212 can also be in a square structure, which is not described here.

[0047] Further, as Figures 3 to 5As shown, the self-locking structure includes a limiting block 31 and an elastic member 32. The first connecting seat 10 is provided with a receiving groove 14, which is connected to the opening 13. The two ends of the elastic member 32 are respectively connected to the bottom of the limiting block 31 and the receiving groove 14. The elastic member 32 causes the limiting block 31 to stop in the position of blocking the opening 13. Applying force to the elastic member 32 can cause the elastic member 32 to be received in the receiving groove 14, so as to open the opening 13. Specifically, in this embodiment, the limiting block 31 has an open position and a closed position. When the elastic member 32 is compressed, the limiting block 31 is in the open position and is housed in the receiving groove 14. The snap-fit ​​member 21 can enter the slot 11 through the opening 13 to complete the connection between the first connecting seat 10 and the second connecting seat 20. When the elastic member 32 is reset, the limiting block 31 is in the closed position and is located at the opening 13 to block the opening 13, preventing the snap-fit ​​member 21 from coming out of the slot 11, thereby ensuring the connection stability of the first connecting seat 10 and the second connecting seat 20.

[0048] Specifically, in this embodiment, both the receiving groove 14 and the opening 13 are cylindrical, and the receiving groove 14 and the opening 13 are coaxially arranged.

[0049] In another embodiment, the receiving groove 14 can be located on the side of the opening 13 away from the slot 11, and has the same depth as and communicates with the opening 13. The limiting block 31 is elastically disposed in the receiving groove 14 by the elastic member 32. This allows the limiting block 31 to be in the open position when the elastic member 32 is compressed, and the limiting block 31 to be received in the receiving groove 14. The snap-fit ​​member 21 can then enter the slot 11 through the opening 13 to complete the connection between the first connecting seat 10 and the second connecting seat 20. At the same time, when the elastic member 32 is reset, the limiting block 31 is in the closed position, located at the opening 13 to block the opening 13, preventing the snap-fit ​​member 21 from coming out of the slot 11, thereby ensuring the connection stability of the first connecting seat 10 and the second connecting seat 20. Further details are omitted here.

[0050] Further, please refer to Figures 3 to 5 The self-locking structure also includes a cable 33, one end of which is fixed, and the other end of which is connected to a limiting block 31. Applying force to the cable 33 can overcome the elastic force of the elastic member 32, so that the limiting block 31 is received in the receiving groove 14. Specifically, in this embodiment, the first connecting seat 10 has a cable 33 hole, which connects the receiving groove 14 to the outside. Two cables 33 are provided. The two ends of one cable 33 are connected to two of the limiting blocks 31, and the two ends of the other cable 33 are respectively connected to the other two limiting blocks 31. Pulling the cable 33 can provide tension to the limiting member, thereby causing the limiting member to compress the elastic member 32, so as to ensure that the limiting member can be received in the receiving groove 14 to open the opening 13. When the cable 33 is released, the cable 33 is close to the outer wall of the first connecting seat 10 to avoid accidental contact.

[0051] Specifically, in the embodiment, please refer to Figures 3 to 5 The self-locking structure further comprises a pulley 34 arranged at the joint of the hole of the cable 33 and the accommodating groove 14, which can change the direction of the cable 33 to ensure the normal realization of the self-locking function.

[0052] In another embodiment, the number of the cable 33 and the number of the limiting block 31 can be correspondingly arranged, so that the adjustment of the limiting block 31 is single adjustment, which is not described here.

[0053] Further, please refer to Figure 2 The end of the limiting block 31 towards the clamping piece 21 is provided with a notch 311 which can abut against the clamping piece 21. Specifically, in the embodiment, the limiting part 211 is in a cylindrical structure, and correspondingly, the notch 311 arranged at the end of the limiting block 31 towards the limiting part 211 of the clamping piece 21 is in an arc structure, which can increase the contact area of the limiting block 31 and the clamping piece 21, and further increase the stress area, reduce the stress concentration when the limiting block 31 and the clamping piece 21 collide, avoid the reduction of service life caused by the collision of the limiting block 31 and the clamping piece 21, and ensure the safety in use.

[0054] In the embodiment, a breakwater is also disclosed, which comprises a first floating body and a second floating body, and further comprises the connecting device as described above, which is used for connecting the first floating body and the second floating body. Specifically, in the embodiment, the first floating body and the first connecting seat 10 are fixedly connected, and the second floating body and the second connecting seat 20 are fixedly connected. Such a breakwater is provided with the connecting device as described above, which not only has high connection efficiency, but also can allow the first floating body and the second floating body to rotate within a certain range, thereby reducing the load impact on the connecting device, and further improving the service life.

[0055] Obviously, the above embodiments of the utility model are only examples for clearly illustrating the utility model, and are not the limitation of the embodiments of the utility model. For ordinary skilled in the art, various obvious changes, re-adjustment and replacement can be made without departing from the protection scope of the utility model. Here, it is not necessary and impossible to enumerate all the embodiments. Any modification, equivalent replacement and improvement made within the spirit and principle of the utility model should be included in the protection scope of the utility model claim.

Claims

1. A connection device, characterized in that The connecting device comprises: a first connecting structure comprising a first connecting seat (10) provided with a clamping groove (11) extending along the circumference of the first connecting seat (10), one end of the clamping groove (11) being provided with an opening (13); a second connecting structure comprising a second connecting seat (20) and a clamping piece (21) fixedly arranged on the second connecting seat (20), at least part of the clamping piece (21) being clamped in the clamping groove (11) and being capable of sliding along the clamping groove (11), the clamping piece (21) being capable of being separated from the clamping groove (11) through the opening (13); a self-locking structure arranged on the first connecting seat (10) and used for opening or blocking the opening (13).

2. The connection device according to claim 1, characterized in that The clamping groove (11) comprises a limiting groove (111) and a guide groove (112), the limiting groove (111) being communicated with the outside through the guide groove (112), and the cross section of the clamping groove (11) is in a T-shaped structure; the clamping piece (21) comprises a limiting portion (211) and a connecting portion (212) fixedly connected, the connecting portion (212) being fixedly connected to the second connecting seat (20), and the limiting portion (211) being slidingly arranged in the limiting groove (111), and the end face of the limiting portion (211) close to the second connecting seat (20) being capable of abutting against the end face of the limiting groove (111) close to the second connecting seat (20).

3. The connection device according to claim 2, characterized in that The end face of the limiting portion (211) close to the second connecting seat (20) and the end face of the limiting groove (111) close to the second connecting seat (20) both have a certain slope.

4. The connection device of claim 2, wherein The bottom face of the limiting groove (111) is a first inclined face (1111), so that the depth of the limiting groove (111) gradually decreases along the direction away from the opening (13); the end face of the limiting portion (211) away from the second connecting seat (20) is a second inclined face (2111), and the first inclined face (1111) and the second inclined face (2111) are arranged in a spaced manner.

5. The connection device of claim 2, wherein The limiting portion (211) and / or the connecting portion (212) are in a cylindrical structure.

6. The connection device of claim 1, wherein The self-locking structure comprises a limiting block (31) and an elastic member (32), the first connecting seat (10) is provided with an accommodating groove (14) communicated with the opening (13), two ends of the elastic member (32) are connected to the limiting block (31) and the groove bottom of the accommodating groove (14) respectively, the elastic member (32) makes the limiting block (31) stop at the position of blocking the opening (13), and applying force to the elastic member (32) can make the elastic member (32) be accommodated in the accommodating groove (14) to open the opening (13).

7. The connection device according to claim 6, characterized in that The self-locking structure further comprises a pull cable (33), one end of the pull cable (33) is fixed, the other end of the pull cable (33) is connected to the limiting block (31), and force applied to the pull cable (33) can overcome the elastic force of the elastic member (32) to make the limiting block (31) be accommodated in the accommodating groove (14).

8. The connection device of claim 6, wherein One end of the limiting block (31) towards the clamping piece (21) is provided with a notch (311), and the notch (311) can abut against the clamping piece (21).

9. The connection device according to any one of claims 1-8, characterized in that The clamping grooves (11) on the first connecting seat (10) are provided with a plurality of clamping grooves (11), the plurality of clamping grooves (11) are uniformly distributed on the end face of the first connecting seat (10) around the circumference of the first connecting seat (10), the clamping pieces (21) on the second connecting seat (20) are provided with a plurality of clamping pieces (21), the plurality of clamping pieces (21) are uniformly distributed on the end face of the second connecting seat (20) around the circumference of the second connecting seat (20), and the plurality of clamping pieces (21) are one-to-one correspondingly and slidingly arranged in the plurality of clamping grooves (11).

10. A breakwater comprising a first float and a second float, characterised in that, The breakwater further comprises the connecting device according to any one of claims 1-9, and the connecting device is used for connecting the first floating body and the second floating body.

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