A simple chain link overload protection device

Abstract

The present invention belongs to the fields of ships and offshore engineering, and in particular, to a simple chain link overload protection device, including a chain link. The chain link includes two arc-shaped portions, two first straight body connecting portions, and a straight body portion. The two ends of the straight body portion are integrally formed with the two arc-shaped portions respectively, and one end of each of the two arc-shaped portions is integrally formed with the first straight body connecting portion. An overload protection portion is provided between the two first straight body connecting portions. The present invention is simple and practical. The required remaining strength and cross-sectional area can be calculated as needed, and then the chain link can be processed to the corresponding cross-sectional area to achieve the purpose of overload protection. On the other hand, when the non-welded chain link is used as a counterweight chain, compared with the ordinary counterweight chain, the processes of flash welding and weld non-destructive testing are reduced, the cost is greatly reduced, and the practicability is significantly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of ships and offshore engineering, and particularly relates to a simple chain link overload protection device. Background Art

[0002] Anchor chains are essential outfitting parts on ships, and mooring chains are important equipment for mooring and positioning of offshore floating systems. Anchor chains and mooring chains are assembled together through multiple chain links. Traditional chain links, as Figure 1 shown, include an arc portion, a first straight body connecting portion, and a straight body portion. The two first straight body connecting portions are welded together to form a first welding portion. During use, both anchor chains and mooring chains are mainly subjected to axial tensile loads. Most of the time, there are requirements for the lower limit of the bearing capacity of the anchor chain, which is the minimum breaking load specified by the classification society; but sometimes, to protect the entire system, there are requirements for the upper limit of the bearing capacity of the anchor chain. At this time, a chain link that can automatically break under a specific load is needed. The present invention provides a simple chain link overload protection device, enabling the chain link to automatically break under a specific load, thereby playing a role in protecting other equipment. Summary of the Invention

[0003] The purpose of the present invention is to solve the problems existing in the prior art, and to propose a simple chain link overload protection device.

[0004] To achieve the above purpose, the present invention adopts the following technical solutions:

[0005] A simple chain link overload protection device includes a chain link. The chain link includes two arc portions, two first straight body connecting portions, and a straight body portion. The two ends of the straight body portion are integrally formed with the two arc portions respectively, and one end of each of the two arc portions is integrally formed with the first straight body connecting portion. An overload protection portion is provided between the two first straight body connecting portions.

[0006] Preferably, the overload protection portion includes a second straight body connecting portion and a cutting portion formed by cutting the first straight body connecting portion. The end faces of the two second straight body connecting portions are welded together to form a second welding portion.

[0007] Preferably, the overload protection portion includes a gap formed by cutting off the two first straight body connecting portions.

[0008] Preferably, the length of the second straight body connecting portion is 1.2 cm - 2 cm.

[0009] Preferably, the outer diameter of the second straight body connecting portion is one-half to two-thirds of the outer diameter of the first straight body connecting portion.

[0010] Preferably, the width of the gap is 1.5 mm - 3 mm.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0012] 1. The technical solution adopted by the present invention is to artificially reduce the diameter of a part of the first straight body connecting portion by machining, weld the two second straight body connecting portions, and then assemble the invention onto an anchor chain or a mooring chain. As an overload protection device, in the event of an overload, the second welded portion will break preferentially, thereby playing a role in protecting other equipment.

[0013] 2. The present invention can also directly truncate a part of the first straight body connecting portion to form a gap, and then assemble the invention onto an anchor chain or a mooring chain. As an overload protection device, in the event of an overload, due to the setting of the gap, the two first straight body connecting portions are not welded, and the arc portion will bend, thereby playing a role in protecting other equipment. In addition to being used for overload protection, the chain link can also be used as a counterweight chain that does not bear load. In this case, the length of the chain link can be appropriately shortened to achieve the effect of increasing the weight per meter.

[0014] The present invention is simple and practical. The required remaining strength and cross-sectional area can be calculated as needed, and then the chain link can be processed to the corresponding cross-sectional area to achieve the purpose of overload protection. On the other hand, when the non-welded chain link is used as a counterweight chain, compared with the ordinary counterweight chain, the processes of flash welding and weld nondestructive testing are reduced, the cost is greatly reduced, and the practicability is significantly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a three-dimensional schematic diagram of a common chain link in the prior art;

[0016] Figure 2 is a three-dimensional schematic diagram of a simple chain link overload protection device proposed by the present invention;

[0017] Figure 3 is a front view of a simple chain link overload protection device proposed by the present invention;

[0018] Figure 4 is a three-dimensional schematic diagram of a simple chain link overload protection device proposed in Embodiment 2 of the present invention;

[0019] Figure 5 is Figure 4 the front view of;

[0020] Figure 6 is a schematic diagram of a simple chain link overload protection device proposed by the present invention during use.

[0021] In the figure: 1. Link; 101. Arc part; 102. First straight body connecting part; 103. Straight body part; 104. First welding part; 2. Circumferential cutting part; 201. Second straight body connecting part; 202. Second welding part; 3. Gap. Detailed implementation mode

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0023] Embodiment 1

[0024] Refer to Figures 1-6 , a simple link overload protection device, including a link 1, the link 1 includes two arc parts 101, two first straight body connecting parts 102 and a straight body part 103. The two ends of the straight body part 103 are integrally formed with the two arc parts 101 respectively. One end of each of the two arc parts 101 is integrally formed with the first straight body connecting part 102. An overload protection part is arranged between the two first straight body connecting parts 102. The overload protection part includes a second straight body connecting part 201 and a circumferential cutting part 2 formed after circumferentially cutting the first straight body connecting part 102. The end faces of the two second straight body connecting parts 201 are welded to form a second welding part 202. Through the arrangement of the second straight body connecting part 201, as an overload protection device, in case of an overload, the second welding part 202 will break preferentially, so as to play a role in protecting other equipment. The length of the second straight body connecting part 201 is 1.2 cm - 2 cm, and the outer diameter of the second straight body connecting part 201 is one-half to two-thirds of the outer diameter of the first straight body connecting part 102.

[0025] Working principle: The technical solution adopted by the present invention is to artificially reduce the diameter of a part of the first straight body connecting part 102 by machining, weld the two second straight body connecting parts 201, and then assemble the invention onto an anchor chain or a mooring chain. As an overload protection device, in case of an overload, the second welding part 202 will break preferentially, so as to play a role in protecting other equipment.

[0026] Embodiment 2

[0027] Refer to Figures 1-6, A simple chain link overload protection device, including a chain link 1. The chain link 1 includes two arc-shaped parts 101, two first straight body connecting parts 102 and a straight body part 103. The two ends of the straight body part 103 are integrally formed with the two arc-shaped parts 101 respectively. One end of each of the two arc-shaped parts 101 is integrally formed with the first straight body connecting part 102. An overload protection part is arranged between the two first straight body connecting parts 102. The overload protection part includes a gap 3 formed by cutting off the two first straight body connecting parts 102. In addition to being cut by machining, it is also possible to directly skip the welding step after the chain link is bent, and directly perform heat treatment and subsequent production steps. Through the setting of the gap 3, the two first straight body connecting parts 102 are not welded, then the arc-shaped part 101 will bend, thus playing a role in protecting other equipment. The chain link is used for overload protection in addition to this. The width of the gap 3 is 1.5 mm - 3 mm.

[0028] Working principle: In the present invention, a part of the first straight body connecting part 102 can also be directly truncated to form the gap 3, and then the present invention is assembled onto an anchor chain or a mooring chain as an overload protection device. When an overload occurs, through the setting of the gap 3, the two first straight body connecting parts 102 are not welded, then the arc-shaped part 101 will bend, thus playing a role in protecting other equipment. The chain link can be used for overload protection in addition to being used as a counterweight chain that does not bear load. In this case, the length of the chain link can be appropriately shortened, so as to achieve the effect of increasing the weight per meter.

[0029] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A simple chain link overload protection device, comprising a chain link (1), characterized in that, The link (1) includes two arc-shaped portions (101), two first straight body connecting portions (102), and a straight body portion (103). The two ends of the straight body portion (103) are integrally formed with the two arc-shaped portions (101) respectively. One end of each of the two arc-shaped portions (101) is integrally formed with the first straight body connecting portion (102). An overload protection portion is provided between the two first straight body connecting portions (102). The overload protection portion includes a second straight body connecting portion (201) and a cutting portion (2) formed by circumferentially cutting the first straight body connecting portion (102). The end faces of the two second straight body connecting portions (201) are welded to form a second welding portion (202). The overload protection portion includes a gap (3) formed by cutting off the two first straight body connecting portions (102).

2. The simple link overload protection device according to claim 1, wherein The length of the second straight body connecting portion (201) is 1.2 cm - 2 cm.

3. The simple chain link overload protection device according to claim 2, characterized in that, The outer diameter of the second straight body connecting portion (201) is one-half to two-thirds of the outer diameter of the first straight body connecting portion (102).

4. A simple chain link overload protection device according to claim 1, characterized in that, The width of the gap (3) is 1.5 mm - 3 mm.

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