A fixed and simple guide sprocket for untwisting anchor chains

Abstract

The present invention discloses a fixed simple guide sprocket for untwisting anchor chains, which comprises a backing plate. A steel cylinder is arranged on the top of the backing plate. Four triangular reinforcing plates for improving the shear bearing capacity of the weld between the steel cylinder and the backing plate are arranged inside the steel cylinder. Above the triangular reinforcing plates, a steel support for improving the stiffness of the steel cylinder is arranged. Along the height direction from bottom to top on the outside of the backing plate, an untwisting device for restricting and correcting the degree of torsion when the anchor chain passes through is arranged. Two fixing shafts, upper and lower, are arranged at the inner side end of the untwisting device. Corresponding guide sprockets are arranged on the outer walls of the two fixing shafts. A reverse stop assembly for preventing the guide sprocket from rotating is arranged on one side of the guide sprocket. The present invention relates to the technical field of marine machinery. The fixed simple guide sprocket for untwisting anchor chains successfully overcomes the limitation of the length of the anchor chain untwisted at one time and gets rid of the dependence on the marine crane for the anchor chain untwisting operation.

Description

Technical Field

[0001] The present invention relates to the technical field of marine machinery, and particularly to a fixed simple guide sprocket for untwisting an anchor chain. Background Art

[0002] When the anchor chain of a deep - sea floating wind power mooring system is transported to the site, it is usually piled up in a mess. Before laying an ultra - long, thick and heavy anchor chain, it is very important to untwist the anchor chain that has been twisted into a pile and spread it into a smooth anchor chain and install counterweights.

[0003] At the offshore construction site, due to the lack of professional equipment, the current marine crane has obvious defects such as low efficiency and great potential safety hazards when untwisting the anchor chain by lifting one end of the anchor chain; moreover, limited by the lifting height and lifting weight, the marine crane cannot untwist an ultra - long, thick and heavy anchor chain. Summary of the Invention

[0004] In view of the deficiencies of the prior art, the present invention provides a fixed simple guide sprocket for untwisting an anchor chain, which solves the technical problems mentioned in the background art.

[0005] To achieve the above object, the present invention is realized through the following technical solutions: A fixed simple guide sprocket for untwisting an anchor chain, including a backing plate. A steel cylinder is arranged on the top of the backing plate. Four triangular reinforcing plates for improving the shear bearing capacity of the weld between the steel cylinder and the backing plate are arranged inside the steel cylinder. Above the triangular reinforcing plates, a steel support for improving the stiffness of the steel cylinder is provided. Along the height direction from bottom to top outside the backing plate, a untwisting device for restricting and correcting the torsional degree when the anchor chain passes through is provided. At the inner end of the untwisting device, two fixed shafts are arranged up and down. Corresponding guide sprockets are arranged on the outer walls of the two fixed shafts. A reverse - stop component for preventing the guide sprocket from rotating is arranged on one side of the guide sprocket.

[0006] Preferably, the backing plate is laid on the deck of the ship. The backing plate is made of steel. The thickness of the backing plate is not less than the thickness of the deck, and the area of the backing plate is more than twice the cross - sectional area of the guide sprocket.

[0007] Preferably, the four triangular reinforcing plates are welded in a circumferential array at the bottom end inside the steel cylinder, and the thickness of the triangular reinforcing plates is not lower than the thickness of the steel cylinder.

[0008] Preferably, the steel support is welded horizontally inside the steel cylinder. The length of the steel support is the inner diameter of the steel cylinder, and the included angle between two adjacent steel supports is set to 45°.

[0009] Preferably, a concave groove is provided between the untwisting devices for restricting and correcting the degree of torsion of the anchor chain when passing through the concave groove. The untwisting devices are divided into left and right parts and are symmetrically arranged. The left part is welded to the top of the backing plate, and the right part is installed on the outer wall of the steel cylinder. The untwisting device includes: an upper baffle, a central shaft, gaskets, a lower baffle, and bolts. The upper baffle and the lower baffle are fixedly connected through the central shaft, and a plurality of gaskets are fixedly connected to the outer wall of the central shaft through bolts.

[0010] Preferably, the external structural shape of the guide sprocket is a regular decagon structure, and a pair of clamping blocks are provided on each side of the guide sprocket. The grooves on the surface of the guide sprocket are located in the middle of each pair of clamping blocks. The regular decagon structure of the guide sprocket and the settings of the clamping blocks and grooves on the guide sprocket can clamp any link on the anchor chain.

[0011] Preferably, the reverse stop assembly includes a ratchet wheel, a fixing plate, a swing rod, a support frame, a hydraulic telescopic cylinder, and a linkage frame. The ratchet wheel is fixedly installed on the outer wall of the fixed shaft, the fixing plate is fixedly installed on the inner wall of the upper baffle, the swing rod rotates in the inner wall of the fixing plate through a rotating shaft, a tooth opening is formed at the other end of the swing rod, a reverse stop opening matching the tooth opening is formed at the edge of the ratchet wheel, and the tooth opening and the reverse stop opening are sleeved and engaged with each other. The support frame is fixedly installed at the rear end of the fixing plate, a hydraulic telescopic cylinder is fixedly connected to the inner cavity of the support frame, the output end of the hydraulic telescopic cylinder is fixedly connected to the linkage frame, and the other end of the linkage frame is rotatably connected to the outer wall of the swing rod.

[0012] Advantageous Effects

[0013] The present invention provides a fixed and simple guide sprocket for untwisting an anchor chain. Compared with the prior art, it has the following advantageous effects:

[0014] The present invention is applicable to the untwisting operation before the laying of the anchor chain. According to the specific dimensions of the root link, by adjusting the vertical distance of the concave groove, anchor chains of different specifications can be untwisted, and it also has the guiding function for the laying of the anchor chain; the device has the advantages of simple form, strong applicability, stable structure, safety and reliability, etc. It successfully overcomes the limitation of the length of the single untwisted anchor chain and gets rid of the dependence on the marine crane for the untwisting operation of the anchor chain; the device has low manufacturing cost and can be put into use without complex processing, which can significantly improve the untwisting efficiency of the anchor chain. Brief Description of the Drawings

[0015] Figure 1 is the external structural schematic diagram of the present invention;

[0016] Figure 2 is the top view of the untwisting device and the steel cylinder in the present invention;

[0017] Figure 3 is the front view of the untwisting device and the steel cylinder in the present invention;

[0018] Figure 4 is a schematic structural diagram of the untwisting device in the present invention;

[0019] Figure 5 is a schematic structural diagram of the backstop assembly in the present invention.

[0020] In the figure: 1, backing plate; 2, steel cylinder; 3, triangular reinforcing plate; 4, steel support; 5, untwisting device; 6, fixed shaft; 7, guide sprocket; 8, backstop assembly; 501, upper baffle; 502, middle shaft; 503, gasket; 504, lower baffle; 505, bolt; 801, ratchet; 802, fixing plate; 803, swing rod; 804, support frame; 805, hydraulic telescopic cylinder; 806, linkage frame; 807, positioning shaft. Specific embodiments

[0021] 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. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0022] Please refer to Figures 1-5 , the present invention provides a technical solution: a fixed simple guide sprocket for untwisting an anchor chain, including four backing plates 1. At the top of the four backing plates 1, there is a steel cylinder 2. Inside the steel cylinder 2, there are four groups of triangular reinforcing plates 3 for improving the shear bearing capacity of the weld between the steel cylinder 2 and the backing plate 1. Above the triangular reinforcing plates 3, there is a steel support 4 for improving the stiffness of the steel cylinder 2. Along the height direction from bottom to top outside the backing plate 1, there is an untwisting device 5 for restricting and correcting the torsional degree when the anchor chain passes through. At the inner side end of the untwisting device 5, there are two upper and lower fixed shafts 6. On the outer walls of the two fixed shafts 6, there are corresponding guide sprockets 7. On one side of the guide sprocket 7, there is a backstop assembly 8 for preventing the guide sprocket 7 from rotating.

[0023] The four backing plates 1 are laid on the deck of the ship to strengthen the bearing capacity of the deck. The backing plates 1 are made of steel. The type of the welded-on backing plate 1 is not lower than the steel type of the deck, the thickness of the welded-on backing plate 1 is not less than the thickness of the deck, and the area of the welded-on backing plate 1 is more than twice the cross-sectional area of the guide sprocket 7; in order to increase the adhesion between the welded-on backing plate 1 and the deck surface, the welded-on backing plate 1 can be evenly divided into four pieces and welded to the deck surface to increase the adhesion by increasing the length of the weld. If necessary, grooves can also be opened in the middle of each backing plate 1 and then welded to the deck surface to further improve the adhesion, as specifically shown in Figure 1 .

[0024] Weld a thick steel cylinder 2 with a diameter not less than four times the length of the chain link to the repaired backing plate 1. To improve the shear bearing capacity of the weld between the steel cylinder 2 and the backing plate 1, four groups of triangular reinforcing plates 3 are welded in a circumferential array at the inner bottom end of the steel cylinder 2. The thickness of the triangular reinforcing plates 3 is not less than that of the steel cylinder 2. Specifically, as shown in Figure 1 shown.

[0025] To improve the stiffness of the steel cylinder, steel supports 4 are welded horizontally inside the steel cylinder 2. The length of the steel supports 4 is the inner diameter of the steel cylinder 2, and the included angle between adjacent two steel supports 4 is set to 45°. Specifically, as shown in Figure 1 shown.

[0026] There is a concave groove between the untwisting devices 5 for restricting and correcting the torsional degree of the anchor chain when passing through the concave groove. The untwisting devices 5 are divided into left and right parts and are symmetrically arranged. The left part is welded to the top of the backing plate 1, and the right part is installed on the outer wall of the steel cylinder 2. The untwisting device 5 includes: an upper baffle 501, a central shaft 502, gaskets 503, a lower baffle 504, and bolts 505. The upper baffle 501 and the lower baffle 504 are fixedly connected through the central shaft 502. A plurality of gaskets 503 are fixedly connected to the outer wall of the central shaft 502 through bolts 505. Adjust the distance from the first concave groove according to the specification of the laid anchor chain. The detachable backing plate in the middle is connected to the central shaft 502 through bolts 505. At the same time, select a central shaft 502 with a suitable specification, and the height of the upper and lower baffles 504 can be adjusted by itself according to the number of added or subtracted backing plates to adapt to the laying of anchor chains of various specifications. The form of the concave groove is as shown in Figure 2 , Figure 3 shown

[0027] The backing plate 1 is welded to the deck surface, the steel cylinder 2 is welded to the backing plate 1, the bottom triangular reinforcing plate 3 and the horizontal support backing plate 1 are repaired and welded inside the steel cylinder 2. Finally, the untwisting device 5 is welded to one side of the steel cylinder 2 in the anchor chain laying direction, and the above-mentioned components can be formed into a fixed guide sprocket, achieving the functions of guiding, turning and untwisting the laying of various specifications of anchor chains at sea. The formed fixed guide sprocket is as shown in Figure 1 , Figure 2 , Figure 3 shown.

[0028] The external structural shape of the guide sprocket 7 is set as a regular decagon structure, and a pair of clamping blocks are provided on each side of the guide sprocket 7. The groove on the surface of the guide sprocket 7 is located in the middle of each pair of clamping blocks. The regular decagon structure of the guide sprocket 7 and the setting of the clamping blocks and grooves on the guide sprocket 7 can clamp any link on the anchor chain, and at the same time effectively ensure that at least one group of links of the anchor chain can be stably and effectively clamped on the clamping blocks at any position. The guide sprocket 7 is as shown in Figure 4 , Figure 5 shown.

[0029] The reverse stop assembly 8 includes a ratchet wheel 801, a fixing plate 802, a swing rod 803, a support frame 804, a hydraulic telescopic cylinder 805 and a linkage frame 806. The ratchet wheel 801 is fixedly installed on the outer wall of the fixed shaft 6, the fixing plate 802 is fixedly installed on the inner wall of the upper baffle 501, the swing rod 803 rotates on the inner wall of the fixing plate 802 through a rotating shaft, a tooth opening is formed at the other end of the swing rod 803, a reverse stop opening matching the tooth opening is formed at the edge of the ratchet wheel 801, and the tooth opening and the reverse stop opening are sleeved and engaged with each other. The support frame 804 is fixedly installed at the rear end of the fixing plate 802, a hydraulic telescopic cylinder 805 is fixedly connected inside the support frame 804, the output end of the hydraulic telescopic cylinder 805 is fixedly connected with a linkage frame 806, and the other end of the linkage frame 806 is rotatably connected with the outer wall of the swing rod 803. When it is necessary to stop the machine in case of an emergency, when the hydraulic telescopic cylinder 805 is opened and extended, it will drive the linkage frame 806 to move, the linkage frame 806 drives the swing rod 803 to rotate, and the swing rod 803 is forced to engage with the ratchet wheel 801, so as to prevent the ratchet wheel 801 from driving the fixed shaft 6 and the guide sprocket 7 to rotate in the reverse direction, thereby achieving the reverse stop purpose. By installing the reverse stop assembly 8 on the fixed shaft 6, the phenomenon of the anchor chain slipping can be prevented, the damage to the guide sprocket 7 caused by its reverse rotation can be effectively prevented, and the overall service life can be prolonged. The reverse stop assembly 8 is as Figure 5 shown.

[0030] Meanwhile, the content not detailedly described in this specification belongs to the prior art well-known to those skilled in the art.

[0031] The working principle of the fixed simple guide sprocket for untwisting the anchor chain: Before untwisting the super-long, thick and heavy anchor chain twisted into a pile, connect the end ring of the anchor chain with the winch steel wire rope on the ship through the installation ring. The anchor chain passes through between the two guide sprockets 7. When the winch pulls back the steel wire rope to drag the anchor chain, when the anchor chain passes through the guide sprockets, under the fixed limiting action of the two groups of guide sprockets 7 and in cooperation with the untwisting device 5, the chain links will be forced to be untwisted and dragged into a smooth anchor chain.

[0032] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or sequence between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to this process, method, article or device.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fixed simple guide sprocket for untwisting an anchor chain, comprising a backing plate (1), characterized in that: A steel cylinder (2) is provided on the top of the backing plate (1). Four triangular reinforcing plates (3) for improving the shear bearing capacity of the weld between the steel cylinder (2) and the backing plate (1) are provided inside the steel cylinder (2). Above the triangular reinforcing plates (3), a steel support (4) for improving the stiffness of the steel cylinder (2) is provided. Along the height direction from bottom to top on the outside of the backing plate (1), a untwisting device (5) for restricting and correcting the torsional degree when the anchor chain passes through is provided. At the inner end of the untwisting device (5), two fixed shafts (6) are provided up and down. On the outer walls of the two fixed shafts (6), corresponding guide sprockets (7) are provided. On one side of the guide sprocket (7), a reverse stop assembly (8) for preventing the guide sprocket (7) from rotating back is provided; A concave groove is provided between the untwisting devices (5) for restricting and correcting the torsional degree when the anchor chain passes through the concave groove. The untwisting device (5) is divided into left and right parts and is symmetrically arranged. The left part is welded to the top of the backing plate (1), and the right part is installed on the outer wall of the steel cylinder (2). The untwisting device (5) includes: an upper baffle (501), a middle shaft (502), gaskets (503), a lower baffle (504), and bolts (505). The upper baffle (501) and the lower baffle (504) are fixedly connected through the middle shaft (502). A plurality of gaskets (503) are fixedly connected to the outer wall of the middle shaft (502) through bolts (505); The reverse stop assembly (8) includes a ratchet (801), a fixing plate (802), a swing rod (803), a support frame (804), a hydraulic telescopic cylinder (805), and a linkage frame (806). The ratchet (801) is fixedly installed on the outer wall of the fixed shaft (6). The fixing plate (802) is fixedly installed on the inner wall of the upper baffle (501). The swing rod (803) rotates on the inner wall of the fixing plate (802) through a rotating shaft. A tooth opening is provided at the other end of the swing rod (803). A reverse stop opening matching the tooth opening is provided at the edge of the ratchet (801), and the tooth opening and the reverse stop opening are sleeved and engaged with each other. The support frame (804) is fixedly installed at the rear end of the fixing plate (802). A hydraulic telescopic cylinder (805) is fixedly connected to the inner cavity of the support frame (804). The output end of the hydraulic telescopic cylinder (805) is fixedly connected to the linkage frame (806). The other end of the linkage frame (806) is rotatably connected to the outer wall of the swing rod (803).

2. The fixed simple guide sprocket for untwisting anchor chains according to claim 1, characterized in that: The backing plate (1) is laid on the deck of the ship. The backing plate (1) is made of steel. The thickness of the backing plate (1) is not less than the thickness of the deck. The area of the backing plate (1) is more than twice the cross-sectional area of the guide sprocket (7).

3. A fixed simple guide sprocket for untwisting anchor chains according to claim 1, characterized in that: The four groups of triangular reinforcing plates (3) are welded in a circumferential array at the inner bottom end of the steel cylinder (2). The thickness of the triangular reinforcing plates (3) is not lower than the thickness of the steel cylinder (2).

4. A fixed simple guide sprocket for untwisting anchor chains according to claim 1, characterized in that: The steel support (4) is welded horizontally inside the steel cylinder (2). The length of the steel support (4) is the inner diameter of the steel cylinder (2). The included angle between two adjacent steel supports (4) is set to 45°.

5. A fixed simple guide sprocket for untwisting anchor chains according to claim 1, characterized in that: The external structural shape of the guide sprocket wheel (7) is set as a regular decagon structure, and a pair of clamping blocks are provided on each side of the guide sprocket wheel (7). The groove on the surface of the guide sprocket wheel (7) is located at the middle position of each pair of clamping blocks. The regular decagon structure of the guide sprocket wheel (7) and the arrangement of the clamping blocks and grooves on the guide sprocket wheel (7) can clamp any link on the anchor chain.

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