A special tool for adjusting and fixing a single point mooring stopper

Abstract

The application discloses a special tool for adjusting and fixing a single-point mooring chain stopper, and relates to the technical field of ocean engineering.The special tool for adjusting and fixing a single-point mooring chain stopper comprises a chain stopper trunnion shell and two chain stopper X-axis joint cylinders, the chain stopper X-axis joint cylinders are located on the two sides of the chain stopper trunnion shell, the chain stopper X-axis joint cylinders can rotate around the chain stopper trunnion shell through internal pin shafts, the chain stopper trunnion shell is provided with a fixing tool on the side facing the chain stopper X-axis joint cylinders, and the fixing tool comprises a support fixed on the chain stopper trunnion shell and an eye ring fixed on the top end of the chain stopper X-axis joint cylinder.The first rotating shaft, the second rotating shaft and the fixing rod are arranged, the relative position of the first rotating shaft and the second rotating shaft is changed by adjusting the rotary motion of the left threaded rod and the right threaded rod at the two ends of the fixing rod, and the relative angle between the chain stopper trunnion shell and the chain stopper X-axis joint cylinder is adjusted and fixed.

Description

Technical Field

[0001] The invention relates to the technical field of marine engineering, in particular to a special tool for adjusting and fixing a single-point mooring chain stopper. Background Art

[0002] Currently, in the offshore oil industry, as offshore oil and gas development gradually expands into deepwater and offshore areas, the cost and risk of laying long-distance oil and gas return pipelines are increasing. The most effective solution to this problem is to build offshore oil and gas processing plants—Floating Production Storage and Offloading (FPSO) vessels. FPSOs, with their powerful single-point mooring properties, are a widely accepted method for oil and gas extraction. The chain stopper, a core component of the single-point mooring system, is located within the lower portion of the single-point anchor chain plate structure. It primarily secures and protects the anchor chain, bearing the entire mooring force.

[0003] The chain stopper itself has a special structure. It is a double-hinged mechanism. Since a large number of pipes, cables and their accessories are arranged in the anchor chain disc structure, the structure is very compact, and the installation requires that the chain stopper and the anchor chain disc are at a certain angle. In this way, when the chain stopper is hoisted, it is necessary to limit the swing between the roller body and the pitch body so that it is always in a stable posture during the hoisting process to prevent the instability generated during the hoisting process from causing damage to the chain stopper and personnel. However, in the existing technology, the chain stopper structure has poor stability and cannot solve the above problems well. For this reason, a special tooling for adjusting and fixing a single-point mooring chain stopper is proposed. Summary of the Invention

[0004] The object of the present invention is to provide a special tool for adjusting and fixing a single-point mooring chain stopper, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a special tool for adjusting and fixing a single-point mooring chain stopper, comprising a chain stopper trunnion housing and two chain stopper X-axis segment cylinders, the chain stopper X-axis segment cylinders being located on both sides of the chain stopper trunnion housing, the chain stopper X-axis segment cylinders being rotatable around the chain stopper trunnion housing via an internal pin, the chain stopper trunnion housing being provided with a fixing tool on the side facing the chain stopper X-axis segment cylinder, the fixing tool comprising a support fixed on the chain stopper trunnion housing and a lifting ear fixed on the top end of the chain stopper X-axis segment cylinder, a first bearing being fixed on the front face of the support, a first rotating shaft being fixed on the front face of the inner ring of the first bearing, the first rotating shaft being rotatable around its axis, a second rotating shaft being provided on one side of the lifting ear, a second bearing being fixed on the side face of the second rotating shaft, the inner ring of the second bearing being fixed to the lifting ear via a first bolt, the second rotating shaft being rotatable around its axis, threaded holes being provided on the shaft bodies of the first rotating shaft and the second rotating shaft, fixing rods being screwed into the threaded holes of the first rotating shaft and the second rotating shaft.

[0006] Preferably, the support and the chain stopper trunnion housing are fixed by a second bolt.

[0007] Preferably, the first bolt includes a screw fixed to the inner ring of the second bearing, a fixing ring is integrally formed on the screw body, the screw is adapted to the circular through hole at the top of the lifting ear, and a nut is threaded onto one side of the screw body.

[0008] Preferably, the fixing rod includes a left threaded rod and a right threaded rod which are arranged on both sides of the fixing rod and are integrally formed with the fixing rod, and the left threaded rod and the right threaded rod are respectively adapted to the threaded holes of the first rotating shaft and the second rotating shaft.

[0009] Preferably, an outer hexagonal column is fixed in the middle of the fixing rod.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] The single-point mooring chain stopper adjustment and fixation special tooling is provided with a first rotating shaft, a second rotating shaft and a fixing rod. By adjusting the rotational movement of the left threaded rod and the right threaded rod at both ends of the fixing rod, the relative position of the first rotating shaft and the second rotating shaft is changed, so that the relative angle between the chain stopper ear shaft housing and the chain stopper X-axis segment cylinder can be adjusted and fixed. The device can be used by two people to achieve a stable posture of the chain stopper X-axis segment cylinder relative to the chain stopper ear shaft housing, so that the chain stopper is conveniently installed in a narrow anchor chain disc structure. The tooling has a simple structure, low manufacturing cost, is easy to carry and install on site, and improves the structural stability of the chain stopper, avoiding damage to the chain stopper and personnel caused by instability during the lifting process. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a diagram showing the layout of the tooling for adjusting and fixing the chain stopper of the present invention;

[0013] Figure 2 Schematic diagram of the overall structure of the chain stopper of the present invention;

[0014] Figure 3 This is a schematic diagram of the connection between the support and the first rotating shaft of the present invention;

[0015] Figure 4 Schematic diagram of the connection between the second rotating shaft and the lifting lug of the present invention.

[0016] In the figure: 101, chain stopper ear shaft housing; 1, support; 2, first rotating shaft; 301, left threaded rod; 302, right threaded rod; 303, outer hexagonal prism; 4, second rotating shaft; 5, first bolt; 501, screw rod; 502, fixing ring; 503, nut; 6, second bolt; 7, lifting ear; 8, second bearing; 102, chain stopper X-axis section cylinder. DETAILED DESCRIPTION

[0017] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] It should be noted that, in the description of the present invention, the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0019] Furthermore, it should be understood that for the sake of ease of description, the sizes of the various components shown in the drawings are not drawn according to actual proportions. For example, the thickness or width of certain layers may be exaggerated relative to other layers.

[0020] It should be noted that like numbers and letters represent similar items in the following figures, so once an item is defined or described in one figure, it will not need to be further discussed and described in detail in the description of the subsequent figures. Example

[0021] The chain stopper itself has a special structure. It is a double-hinged mechanism. When hoisting the chain stopper, it is necessary to limit the swing between the roller body and the pitch body so that it is always in a stable posture during the hoisting process to prevent the instability generated during the hoisting process from causing damage to the chain stopper and personnel.

[0022] like Figure 1-4 As shown, the present invention provides a technical solution: a special tool for adjusting and fixing a single-point mooring chain stopper, comprising a chain stopper ear shaft housing 101 and two chain stopper X-axis segment cylinders 102, the chain stopper X-axis segment cylinders 102 being located on both sides of the chain stopper ear shaft housing 101. It should be noted that the chain stopper X-axis segment cylinders 102 are symmetrically distributed on both sides of the chain stopper ear shaft housing 101, and the chain stopper X-axis segment cylinders 102 can rotate around the chain stopper ear shaft housing 101 through the internal pin shaft. The above is the existing technology and will not be described in detail in this article. A fixing tool is provided on the chain stopper ear shaft housing 101 facing the chain stopper X-axis segment cylinder 102.

[0023] Among them, the fixed tooling includes a support 1 fixed on the chain stopper ear shaft housing 101 and a lifting ear 7 fixed on the top of the chain stopper X-axis section cylinder 102, a circular through hole is opened on the top of the lifting ear 7, and the support 1 and the chain stopper ear shaft housing 101 are fixed by a second bolt 6, which makes it convenient to disassemble and assemble the device, thereby facilitating additional installation and carrying. A first bearing is fixed on the front of the support 1, and a first rotating shaft 2 is fixed on the front of the inner ring of the first bearing, so that the first rotating shaft 2 can rotate, that is, the first rotating shaft 2 can rotate around its axis, and a second rotating shaft 4 is provided on one side of the lifting ear 7, and a second bearing 8 is fixed on the side of the second rotating shaft 4, and the inner ring of the second bearing 8 is fixed to the The ears 7 are fixed to each other by the first bolt 5. Similarly, the second rotating shaft 4 can rotate around its axis. Threaded holes are provided on the shaft bodies of the first rotating shaft 2 and the second rotating shaft 4. The apertures of the threaded holes are equal. It should be pointed out that the axes of the threaded holes of the first rotating shaft 2 and the second rotating shaft 4 are on the same plane. A fixing rod is screwed into the threaded holes of the first rotating shaft 2 and the second rotating shaft 4. The fixing rod is made of 304 stainless steel. 304 stainless steel has good corrosion resistance, heat resistance, low temperature strength and mechanical properties, good hot working properties such as stamping and bending, no heat treatment hardening phenomenon, corrosion resistance in the atmosphere, and good processing performance and weldability, so it is suitable for this embodiment.

[0024] In order to ensure the smooth implementation of this solution, it should be noted that the first bolt 5 includes a screw 501 fixed to the inner ring of the second bearing 8, and a fixing ring 502 is integrally formed on the rod body of the screw 501. The screw 501 is adapted to the circular through hole at the top of the lifting ear 7. A nut 503 is screwed to the rod body on one side of the screw 501. Specifically, during installation, first insert the screw 501 into the circular through hole at the top of the lifting ear 7 so that the fixing ring 502 contacts the side wall of the lifting ear 7, and then screw the nut 503 onto the screw 501 and tighten it.

[0025] In order to ensure the smooth implementation of this solution, it should be understood that the fixed rod includes a left threaded rod 301 and a right threaded rod 302 which are arranged on both sides of the fixed rod and are integrally formed with the fixed rod. The thread directions of the left threaded rod 301 and the right threaded rod 302 are the same. It should be known that the left threaded rod 301 and the right threaded rod 302 are respectively adapted to the threaded holes of the first rotating shaft 2 and the second rotating shaft 4. An outer hexagonal column 303 is fixed in the middle of the fixed rod. The specific fixing method is welding. The setting of the outer hexagonal column 303 is used for the operator to rotate the fixed rod.

[0026] To supplement this solution, during operation, the present invention sets two sets of identical tooling on both sides of the chain stopper ear shaft housing 101. When in use, two people operate the rotating outer hexagonal column 303 at the same time. When the outer hexagonal column 303 rotates, it drives the fixed rod to rotate. Since the first rotating shaft 2 and the second rotating shaft 4 are screwed on both sides of the fixed rod, and the first rotating shaft 2 and the support 1 are fixed, when the fixed rod moves to one side, it drives the movement of the second rotating shaft 4, thereby driving the chain stopper X-axis section cylinder 102 to rotate around the chain stopper ear shaft housing 101 through the internal pin shaft, thereby realizing the adjustment and fixation of the angle of the chain stopper X-axis section cylinder 102, and preventing the chain stopper from being accidentally damaged due to the instability of the chain stopper X-axis section cylinder 102 during the lifting process.

[0027] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A tool for adjusting and fixing a single-point mooring chain stopper, comprising a chain stopper trunnion housing (101) and two chain stopper X-axis segment cylinders (102), wherein the chain stopper X-axis segment cylinders (102) are located on both sides of the chain stopper trunnion housing (101), and the chain stopper X-axis segment cylinders (102) can rotate around the chain stopper trunnion housing (101) via an internal pin shaft, characterized in that: The chain stopper ear shaft housing (101) is provided with a fixing tool on the side facing the chain stopper X-axis segment cylinder (102), and the fixing tool comprises a support (1) fixed on the chain stopper ear shaft housing (101) and a lifting lug (7) fixed on the top of the chain stopper X-axis segment cylinder (102), a first bearing is fixed on the front of the support (1), a first rotating shaft (2) is fixed on the front of the inner ring of the first bearing, and the first rotating shaft (2) can rotate around its axis, a second rotating shaft (4) is provided on one side of the lifting lug (7), a second bearing (8) is fixed on the side of the second rotating shaft (4), the inner ring of the second bearing (8) and the lifting lug (7) are fixed by a first bolt (5), and the second rotating shaft (4) can rotate around its axis, the first rotating shaft (2) and the second rotating shaft (4) are both provided with threaded holes, and fixing rods are screwed into the threaded holes of the first rotating shaft (2) and the second rotating shaft (4).

2. The special tool for adjusting and fixing a single point mooring chain stopper according to claim 1, characterized in that: The support (1) and the chain stopper trunnion housing (101) are fixed via a second bolt (6).

3. The special tool for adjusting and fixing a single-point mooring chain stopper according to claim 1, characterized in that: The first bolt (5) includes a screw rod (501) fixed to the inner ring of the second bearing (8), a fixing ring (502) is integrally formed on the rod body of the screw rod (501), the screw rod (501) is adapted to the circular through hole at the top of the lifting ear (7), and a nut (503) is screwed to the rod body on one side of the screw rod (501).

4. The special tool for adjusting and fixing a single point mooring chain stopper according to claim 1, characterized in that: The fixing rod comprises a left threaded rod (301) and a right threaded rod (302) which are arranged on both sides of the fixing rod and are integrally formed with the fixing rod. The left threaded rod (301) and the right threaded rod (302) are respectively adapted to the threaded holes of the first rotating shaft (2) and the second rotating shaft (4).

5. The special tool for adjusting and fixing a single point mooring chain stopper according to claim 1, characterized in that: An outer hexagonal column (303) is fixed in the middle of the fixing rod.

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