Underwater anchor chain tensioning device

Abstract

The utility model relates to the technical field of anchor chain mooring devices, in particular to an underwater anchor chain tensioning device which comprises a main body frame, a chain stopping mechanism and a chain guide wheel, a guide channel is arranged at one end of the main body frame, the chain guide wheel and the chain stopping mechanism are both rotationally arranged on the inner side of the main body frame, and the chain stopping mechanism is arranged between the chain guide wheel and the guide channel. A driving anchor chain is wound on the guide chain wheel and penetrates out of the chain stopping mechanism and the guide channel, and a driven anchor chain is connected to the end, away from the guide channel, of the main body frame. The tensioning device is simple in overall structure, fast and effective in using method and capable of effectively reducing the tensioning cost of an offshore floating structure, and the chain stopping mechanism can effectively form a locking face to control movement of the active anchor chain; the guide chain wheel is not subjected to the force of the mooring line in the locking state, and additional stress is not generated; the chain stopping baffle can be effectively reset to realize self-locking under the action of self weight and the chain stopping spring; the guide channel is cross-shaped, so that the anchor chain can be prevented from twisting in the moving process.

Description

TECHNICAL FIELD

[0001] The utility model relates to anchor chain mooring device technical field, concretely relates to underwater anchor chain tensioner. BACKGROUND

[0002] Mooring chain is the important equipment of offshore floating mooring positioning, wherein the steel chain becomes the indispensable component in the mooring system because of its excellent bearing capacity, fatigue resistance and wear resistance. The upper end of the mooring chain is generally connected with the platform through the anchor winch and the chain stopper, and is used for adjusting the length of the mooring chain to make it reach the set tension.

[0003] The traditional tensioning method for offshore floating structure has the anchor winch, the hoister and other equipment arranged on the floating platform to perform the tensioning operation of the anchor chain, but such equipment is often expensive and does not meet the economic demand of the long-term operation of the offshore floating structure. For the offshore floating structure, there is another method of realizing the pre-tensioning through the cooperation of the crane and the chain stopper, but this method has high requirements for the installation ship, high cost and great difficulty, and is not conducive to large-scale installation operation. SUMMARY

[0004] In view of the above problems, the utility model provides an underwater anchor chain tensioner to solve the problems of high cost, great technical difficulty and small use scale of the tensioning method for offshore floating structure in the prior art.

[0005] To achieve the above object, the utility model provides an underwater anchor chain tensioner, which comprises a main frame, a chain stopping mechanism and a chain guide wheel, one end of the main frame is provided with a guide channel, the chain guide wheel and the chain stopping mechanism are both rotationally arranged on the inner side of the main frame, the chain stopping mechanism is arranged between the chain guide wheel and the guide channel, a driving anchor chain is wound on the chain guide wheel, the driving anchor chain passes out from the chain stopping mechanism and the guide channel, and a passive anchor chain is connected to the end of the main frame away from the guide channel.

[0006] The chain stopping mechanism comprises a chain stopping baffle and a chain stopping spring, the chain stopping baffle is rotationally installed on the inner side of the main frame, the chain stopping spring is arranged on the side of the chain stopping baffle close to the guide channel, and the two ends of the chain stopping spring are connected with the chain stopping baffle and the main frame respectively.

[0007] A limiting stopper and an inclination baffle are further arranged on the main frame, the limiting stopper is arranged on the side of the rotation shaft of the chain stopping baffle, and the inclination baffle is arranged on the side of the chain stopping baffle close to the guide channel.

[0008] Further, the chain stopping baffle is U-shaped, and the chain stopping baffle is provided with a chain stopping groove in the lower part.

[0009] Further, the chain stopping baffle is provided with a hanging lug, and the hanging lug is arranged at one end of the chain stopping baffle rotating shaft.

[0010] Further, the main body frame is symmetrically provided with a bidirectional locking hole on both sides, the locking column is arranged in the bidirectional locking hole, and the locking column is arranged on the side, away from the guide channel, of the chain stopping baffle.

[0011] Further, the guide channel is a cross structure, and the chain guide wheel is a circular five-toothed sprocket.

[0012] The utility model discloses the beneficial effect of:

[0013] The utility model discloses the tensioning device whole structure is simple, and the use method is quick and effective, can effectively reduce the tensioning cost of offshore floating structure;

[0014] The utility model discloses the chain stopping mechanism can effectively prevent the active anchor chain from moving from the chain guide wheel to the guide channel, and the active anchor chain can move from the guide channel to the chain guide wheel.

[0015] The chain guide wheel is a circular five-toothed sprocket, the circumference of the chain guide wheel in contact with the active anchor chain is tangent to the center line of the active anchor chain, and the tangent point is arranged between the chain stopping mechanism and the passive anchor chain.

[0016] The chain stopping baffle is fork-shaped, the vertically arranged anchor chain link can pass through effectively, and the horizontally arranged anchor chain link can be effectively limited.

[0017] The guide channel is cross-shaped, and the shape and size are suitable for the working anchor chain, can effectively inhibit the twisting of the anchor chain during movement, and can keep the anchor chain in the correct working position. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme of the utility model, the following will be to the embodiment or prior art description needed to use the drawing briefly introduced, obviously, the following description in the drawing is only some embodiments of the present application, for those skilled in the art, under the premise of not paying the creative labor, can also obtain other drawings according to these drawings.

[0019] Figure 1 It is a schematic diagram of the tensioning device whole structure.

[0020] Figure 2Sectional view of the tensioning device Figure 1 ;

[0021] Figure 3 Sectional view of the tensioning device Figure 2 ;

[0022] Figure 4 Schematic view for use of the tensioning device

[0023] Wherein: 1-main frame, 2-chain stopping mechanism, 21-chain stopping baffle, 22-chain stopping spring, 23-chain stopping groove, 3-chain guide wheel, 4-guiding channel, 5-active anchor chain, 6-passive anchor chain, 7-bidirectional locking hole, 8-locking column, 9-limiting stopper, 10-inclination baffle, 11-hanging lug. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0025] In one specific embodiment of the present application, as shown in Figures 1 to 3 Fig. 1, a kind of underwater anchor chain tensioning device, including main frame 1, chain stopping mechanism 2 and chain guide wheel 3, one end of main frame 1 is provided with guiding channel 4, chain guide wheel 3 and chain stopping mechanism 2 are rotationally arranged in the inside of main frame 1, chain stopping mechanism 2 is arranged between chain guide wheel 3 and guiding channel 4, and active anchor chain 5 is wound on chain guide wheel 3, and active anchor chain 5 is pulled out from chain stopping mechanism 2 and guiding channel 4, the end of main frame 1 away from guiding channel 4 is connected with passive anchor chain 6.

[0026] Chain stopping mechanism 2 includes chain stopping baffle 21 and chain stopping spring 22, chain stopping baffle 21 is rotationally installed on the inside of main frame 1, chain stopping spring 22 is arranged on the side of chain stopping baffle 21 close to guiding channel 4, and the two ends of chain stopping spring 22 are connected with chain stopping baffle 21 and main frame 1 respectively, chain stopping spring 22 can assist chain stopping baffle 21 to reset locking position.

[0027] Chain stopping baffle 21 is U-shaped, and the lower part of chain stopping baffle 21 is provided with chain stopping groove 23, in locking state, the side of chain stopping baffle 21 facing passive anchor chain 6 is locking surface, and the other side is non-locking surface, chain stopping groove 23 only allows vertical chain link to pass through, and has locking effect on transverse chain link, and counterweight can be added to chain stopping baffle 21, the counterweight is arranged on the side of non-locking surface, and the counterweight ensures that chain stopping baffle 21 returns to the locking position.

[0028] The main frame 1 is also provided with a limit stop 9 and an inclined baffle 10. The limit stop 9 is located on the rotating side of the chain stop baffle 21. When the chain stop baffle 21 is not locked, the limit stop 9 can prevent the chain stop baffle 21 from being excessively deflected on the guide sprocket 3 side during the pulling of the active anchor chain 5, which would have an adverse effect on the reset of the chain stop baffle 21.

[0029] The inclined baffle 10 is located on the side of the chain stop baffle 21 near the guide channel 4. In the locked state, the inclined baffle 10 engages with the chain stop baffle 21, so that the force on the chain stop baffle 21 can be transmitted to the main frame 1 through the inclined baffle 10.

[0030] The chain stop baffle 21 is provided with a lug 11, and the lug 11 is located at one end of the rotating shaft of the chain stop baffle 21. The lug 11 can be used for external lifting to unlock the locked state of the chain stop baffle 21.

[0031] The main frame 1 has symmetrically arranged bidirectional locking holes 7 on both sides. Locking pins 8 are inserted into the bidirectional locking holes 7. The locking pins 8 are located on the side of the chain stop baffle 21 away from the guide channel 4. The locking pins 8 fix the chain stop baffle 21, so that the chain stop baffle 21 is locked in both directions.

[0032] The guide channel 4 has a cross structure, and the guide sprocket 3 is a circular five-tooth sprocket.

[0033] The process of using this utility model:

[0034] like Figure 2 As shown, the active anchor chain 5 is wound around the guide sprocket 3 and passes through the guide channel 4. The active anchor chain 5 has a fixed end on one side of the guide channel 4 and a free end on one side of the guide sprocket 3. The fixed end is connected to the ship's anchor, and the free end is connected to the engineering vessel. Figure 4 As shown, when installing the floating structure, the floating structure is towed to the designated position where the anchor chain has been laid in advance. The passive anchor chain 6 is connected to the floating structure. The engineering vessel lifts the free end of the active anchor chain 5 to make the anchor chain tensioned in place. The locking pin 8 is inserted into the bidirectional locking hole 7 to limit and fix the chain stop plate 21, thus completing the bidirectional locking of the anchor chain.

[0035] Unless otherwise specified or further limited to one preferred or alternative technical means being another, the preferred and alternative technical means disclosed in this utility model can be arbitrarily combined to form several different technical solutions. Therefore, equivalent changes made according to the claims are still within the scope of this utility model.

Claims

1. An underwater chain tensioner, characterized in that, Including the main body frame (1), chain stop mechanism (2) and guide chain wheel (3), one end of the main body frame (1) is provided with a guide channel (4), the guide chain wheel (3) and the chain stop mechanism (2) are both rotatably arranged inside the main body frame (1), the chain stop mechanism (2) is arranged between the guide chain wheel (3) and the guide channel (4), the guide chain wheel (3) is wound with a driving anchor chain (5), and the driving anchor chain (5) is led out from the chain stop mechanism (2) and the guide channel (4), one end of the main body frame (1) away from the guide channel (4) is connected with a passive anchor chain (6); The chain stop mechanism (2) includes a chain stop baffle (21) and a chain stop spring (22), the chain stop baffle (21) is rotatably mounted on the inner side of the main body frame (1), the chain stop spring (22) is arranged on the side of the chain stop baffle (21) close to the guide channel (4), and the two ends of the chain stop spring (22) are connected with the chain stop baffle (21) and the main body frame (1) respectively. The main body frame (1) is further provided with a limiting stop block (9) and an inclination baffle (10), the limiting stop block (9) is arranged on the side of the chain stop baffle (21) close to the guide channel (4), and the inclination baffle (10) is arranged on the side of the chain stop baffle (21) close to the guide channel (4).

2. An underwater chain tensioner according to claim 1, characterised in that, The chain stop baffle (21) is U-shaped, and the lower part of the chain stop baffle (21) is provided with a chain stop groove (23).

3. An underwater chain tensioner as claimed in claim 1, wherein, The chain stop baffle (21) is provided with an ear (11), and the ear (11) is arranged on one end of the chain stop baffle (21) pivot.

4. An underwater chain tensioner as claimed in claim 1, wherein, The main body frame (1) is provided with a bidirectional locking hole (7) on both sides, the bidirectional locking hole (7) is provided with a locking column (8), and the locking column (8) is arranged on the side of the chain stop baffle (21) away from the guide channel (4).

5. An underwater chain tensioner as claimed in claim 1, wherein, The guide channel (4) is a cross structure, and the guide chain wheel (3) is a circular five-toothed sprocket.

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