Mooring anchor chain combined balancing weight for ocean engineering

Abstract

The utility model discloses a combined balancing weight for an ocean engineering mooring anchor chain, which is composed of an anchor chain and a balancing weight body, the balancing weight body is tightly hooped outside the anchor chain after being assembled through the form that the anchor chain and the balancing weight body are respectively provided with a boss and an alignment groove, and a pin shaft with a large shear-resistant area is adopted in a middle counter bore to penetrate through the middle of an anchor chain ring, so that the connection stability is improved; the two ends of the middle pin do not protrude out of the balancing weight body and cannot be disengaged during long-term use, and safety is better guaranteed. The exteriors of the two heavy block bodies are connected in a welded mode, meanwhile, the connecting clamping plate is used for reinforcing connection, and it is guaranteed that the two heavy block bodies are combined together to form a firm integrated structure. The connecting reliability of the balancing weight and the anchor chain can be better guaranteed, and the device is convenient to assemble before entering water or on land, rapid and reliable in construction, high in economical efficiency and safe and reliable in long-term use.

Description

Technical Field

[0001] The utility model relates to the technical field of marine engineering construction, in particular to a combined counterweight block for marine engineering mooring anchor chains. Background Art

[0002] Offshore floating structures are all anchored by mooring chains. The part of the chain suspended in the water maintains a natural catenary posture. In order to meet the requirements of the floating body being offset and reset under the action of wind, waves and currents, counterweights are generally installed at a certain distance where the mooring chain falls on the seabed, so as to improve the catenary reset ability and ensure the position of the moored floating body.

[0003] Commonly used counterweights are made of two blocks connected by bolts to form a whole. The anchor chain passes through the two halves to connect the counterweight to the anchor chain. Such a counterweight structure is prone to bolt loosening and falling off during the heave and sinking of the anchor chain. Once it falls off, it puts forward higher requirements for underwater repair of the counterweight. If an integral counterweight is used, it is very difficult to install on land and there is no possibility of underwater repair. How to provide a more durable and stable counterweight is an urgent problem to be solved for mooring anchor chains.

[0004] In order to solve the above problems, we proposed a combined counterweight block for marine engineering mooring anchor chain. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art, the utility model provides a combined counterweight block for an anchor chain of an offshore engineering mooring, and the utility model provides the following technical solutions:

[0006] A combined counterweight block for marine engineering mooring anchor chain, comprising an anchor chain and a counterweight block, wherein the counterweight block is tightly embraced on the outside of the anchor chain; the counterweight block is composed of a counterweight block body, an intermediate pin, and a connecting clamping plate, and the counterweight block body is composed of two weight block bodies, and the two weight block bodies are symmetrically provided with mounting bosses and alignment grooves up and down, and an inner table surface is formed in the middle of the weight block body in the longitudinal direction to meet the needs of the passage of the anchor chain. The middle pin is inserted into the middle part of the weight block body on one side through the intermediate pin mounting hole, and clamping plate mounting grooves are symmetrically provided on the top of the two weight block bodies, and the clamping plate mounting grooves are installed with connecting clamps by welding to realize the assembly and fixation of the two weight block bodies.

[0007] Preferably, auxiliary hanging points are provided at both ends of the top of the two weight bodies.

[0008] Preferably, the middle pin is a shaft with a rectangular cross-section forged from high-strength corrosion-resistant steel and slightly angled at both ends, and the middle pin passes through the middle hole of the anchor chain to achieve a central arrangement.

[0009] Preferably, the connecting card plate is a rectangular plate with circular bosses at both ends.

[0010] Compared with the prior art, the utility model can achieve the following beneficial effects:

[0011] 1. The two bodies are provided with bosses and alignment grooves, so that the weight body can be tightly clamped on the outside of the anchor chain after being assembled. A pin with a large shear resistance area is used in the middle countersunk hole to pass through the middle of the anchor chain ring to improve the stability of the connection.

[0012] 2. Both ends of the middle pin do not protrude from the main body of the counterweight block, ensuring that it will not fall out during long-term use, thereby better ensuring safety.

[0013] 3. The two weight blocks are connected externally by welding and reinforced with connecting plates to ensure that the two bodies are combined together to form a solid integrated structure.

[0014] 4. This structural form can better ensure the connection reliability between the counterweight block and the anchor chain. It is easy to assemble before launching or on land. The construction is fast and reliable, highly economical, and safe and reliable for long-term use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] By reading the detailed description of the preferred embodiment below, various other advantages and benefits will become clear to those of ordinary skill in the art. The accompanying drawings are only used to illustrate the purpose of the preferred embodiment and are not considered to be limitations of the present invention. In the entire drawings, the same reference numerals are used to represent the same parts.

[0016] In the attached picture:

[0017] Figure 1 It is a schematic diagram of the overall structure of a preferred embodiment of the utility model;

[0018] Figure 2 It is a schematic diagram of the composition of the counterweight block of the preferred embodiment of the utility model;

[0019] Figure 3 It is a schematic diagram of the composition of the counterweight block of the preferred embodiment of the utility model.

[0020] in, Figures 1 to 3 The corresponding relationship between the reference numerals and the components is as follows:

[0021] 1. Anchor chain; 2. Counterweight block; 21. Counterweight block body; 211. Weight block body; 212. Mounting boss; 213. Middle pin mounting hole; 214. Inner table; 215. Alignment groove; 216. Cardboard mounting groove; 217. Auxiliary lifting point; 22. Middle pin; 23. Connecting cardboard. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution of the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings of the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the described embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the utility model.

[0023] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0024] Combine the following Figure 1-3 A combined counterweight block for an anchor chain of an offshore engineering mooring according to an embodiment of the utility model is specifically described.

[0025] like Figures 1 to 3 As shown, the combined counterweight block of the marine engineering mooring anchor chain is clamped on the outside of the anchor chain 1 in the form of two petals, and the middle pin 22 is clamped at the same time, and is stably connected to the anchor chain 1. The outside is reinforced with a welded connecting clamp plate 23 to ensure long-term safe use. It is composed of a counterweight block body 21, an middle pin 22, and a connecting clamp plate 23.

[0026] The counterweight body 21 is made of cast steel to meet the required weight requirements. It is square, chamfered on the outside, and stepped on the inside. There is an arc-shaped channel in the middle of the longitudinal direction for the anchor chain 1 to pass through, forming an inner table 214, which can be attached to the outside of the anchor chain 1 after the left and right weight body 211 are closed. In order to achieve the closing and alignment of the left and right weight body 211, there are mounting bosses 212 and alignment grooves 215 on the upper and lower parts, respectively. The mounting boss 212 on the left is inserted into the alignment groove 215 on the right; the countersunk hole in the middle is the middle pin mounting hole 213, After the intermediate pin 22 is inserted, the left and right pieces of the weight block body 211 are closed to clamp the middle pin 22, so that it can be connected and fixed with the counterweight block body 21 without welding; after the upper and lower plane casting inspection of the weight block body 211 is qualified, the card plate installation groove 216 is processed, and a countersunk hole with a depth of 15~20mm is used to meet the alignment with the circular bosses at both ends of the connecting card plate 23, and the alignment of the connecting card plate 23 is met. Since the weight block body 211 is single and heavy, auxiliary lifting points 217 are welded on the upper and lower parts to meet the lifting requirements for the convenience of assembly, and the number is arranged according to the needs of the lifting lock. The pre-assembled counterweight block 2 is welded to the left and right halves of the counterweight block body 21 to achieve the stability of the structure under long-term dynamic load conditions, and then the corner welds of the connecting card plates 23 on the left and right sides are welded to the card plate installation groove 216 to strengthen the connection between the two bodies.

[0027] The middle pin is a rectangular cross-section forged from high-strength corrosion-resistant steel with slightly angled shafts at both ends. The middle pin mounting holes 213 of the countersunk weight bodies 211 on both sides are inserted through the two ends. The left and right weight bodies 211 are closed to clamp the middle pin 22, so that it can be connected and fixed to the counterweight body 21 without welding. The middle pin 22 passes through the middle hole of the anchor chain 1 and is arranged in the center to achieve a stable connection between the counterweight 2 and the anchor chain 1.

[0028] The connecting card plate 23 is a rectangular plate with circular bosses at both ends. The bosses have a certain degree of fit into the card plate mounting groove 216. After being fit in, the weight block body 211 is welded and fixed by fillet welds to improve the safety and reliability of the connection between the two weight block bodies 211.

[0029] Specific implementation steps

[0030] Step 1: According to the anchor chain 1 determined by the mooring system design and the counterweight load required at the specific location, determine the basic weight of the counterweight block 2, perform structural design based on the weight, cast the counterweight block 21 according to the dimensions determined by the structural design, then process the clamping plate mounting groove 216, weld the auxiliary hanging point 217, use forgings to make the intermediate pin 22 and the connecting clamping plate 23, and after completion, apply anti-corrosion asphalt to the structural parts to complete the component manufacturing.

[0031] Step 2: During offshore construction or pre-installation on land, lift the chain link at the anchor chain 1 where the counterweight 2 is to be installed, arrange the middle gap vertically, then insert the middle pin 22 into the middle pin installation hole 213 of the weight body 211 on one side, then connect the auxiliary lifting point 217 with the lock to lift the weight body 211 with the middle pin 22 installed, guide the middle pin 22 to be inserted into the hole of the anchor chain 1, and the inner table 214 is close to the anchor chain 1, and the other half is also lifted; adjust the position so that the installation convex on one side The table 212 is aligned with the alignment groove 215 on the other side to form an accurately aligned fit. At the same time, the other end of the middle pin 22 is inserted into the middle pin mounting hole 213 of the weight body 211 on the other side. The countersunk middle pin mounting hole 213 restricts the middle pin 22 from slipping out of the weight body 211. At this time, the inner table surface 214 is close to the outer facade of the anchor chain 1 to prevent the counterweight body 21 from rotating around the anchor chain 1 as a whole. The connecting clamp 23 is inserted from the clamp mounting groove 216 to fix the two weight bodies 211.

[0032] Step 3: Pre-install the counterweight 2, weld the left and right halves of the counterweight 21 to achieve structural stability under long-term dynamic load, and then weld the corner welds of the connecting clamps 23 on the left and right sides to the clamp installation grooves 216 to strengthen the connection between the two bodies. After the installation is completed, continue to lower the anchor chain 1 or assemble the next counterweight 2.

[0033] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A combined counterweight block for an anchor chain used in offshore engineering mooring, comprising an anchor chain (1) and a counterweight block (2), characterized in that: The counterweight (2) is tightly held on the outside of the anchor chain (1); the counterweight (2) is composed of a counterweight body (21), an intermediate pin (22), and a connecting clamp (23); the counterweight body (21) is composed of two weight bodies (211); the two weight bodies (211) are symmetrically provided with mounting bosses (212) and alignment grooves (215) in the upper and lower parts; an inner table surface (214) is provided in the middle of the weight body (211) in the longitudinal direction to form an arc-shaped channel for the anchor chain (1) to pass through; the intermediate pin (22) is inserted into the middle of the weight body (211) on one side through the intermediate pin mounting hole (213); the tops of the two weight bodies (211) are symmetrically provided with clamp mounting grooves (216); the clamp mounting grooves (216) are installed with connecting clamps (23) by welding to realize the assembly and fixation of the two weight bodies (211).

2. The combined counterweight block for anchor chain of marine engineering mooring according to claim 1 is characterized in that: Auxiliary hanging points (217) are provided at both ends of the top of the two weight block bodies (211).

3. The combined counterweight block for anchor chain used in marine engineering mooring according to claim 1, characterized in that: The middle pin (22) is a shaft with a rectangular cross-section and slightly angled ends, forged from high-strength corrosion-resistant steel. The middle pin (22) passes through the middle hole of the anchor chain (1) to achieve a central arrangement.

4. The combined counterweight block for anchor chain of marine engineering mooring according to claim 1 is characterized in that: The connecting clamping plate (23) is a rectangular plate with circular bosses at both ends.

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