KR880002630B1 - Chain and cable connector - Google Patents

Abstract

In an anchoring system for a floating structure, a fair-lead sheave (16) and a connector (17) of a wire rope (14) and a chain (18) are provided for use in hauling in and paying out the anchor. The sheave has a V-shaped groove whose max. effective width is almost same with the width of the chain. The connector is formed into a truncated cone shape to be matched with the V-shape groove over its whole length and has a vale (30) at the end portion of the large diam. of the truncated cone. Both surfaces normal to the vale are cut out from the brim of the large diam. of the truncated cone to form concave surfaces, such that the chain link is well fitted with the vale and extended in the tangential direction to the sheave.

Description

Pulley coupler assembly

1 is a schematic diagram of semi-submersible drilling equipment secured using the fair-lead pulley and connector of the present invention.

2 is a cross-sectional view of the fairlead pulley and its supporting structure.

3 is a side view of a fairlead type and support structure that exhibits a pitch diameter as the cable and chain pass over the fairlead pulley.

4 is a partial view taken along the pulley showing the front side of the pulley and one side wall of the connector in front view, and showing the cable supported in the pulley in cross section.

5 is a view along line 5-5 of FIG.

FIG. 6 is a view along line 6-6 of FIG.

7 is a partially enlarged cross-sectional view of the connector and pulley of the present invention according to line 7-7 of FIG.

FIG. 8 is a partial sectional view showing one side of the pulley groove, a cable and a connector supported in the request portion, and showing how the chain is supported by the pulley and moved along the pulley at the outer periphery of the pulley.

9 is a perspective view of the connector of the present invention.

10 shows one side wall of the connector from the bottom of the groove to the outside, and the connector and the wire rope supported in the groove are overlapped at the top of the pulley and shown in a cross section along lines 5-5 and 6-6, For design similar to FIG. 4, which shows an enlarged pulley and coupler, showing a method of determining the shape of the grooves taken in any cross section of the connector and a method of determining the diameter of the connector in the cross section determined as described above. drawing.

* Explanation of symbols for main parts of the drawings

10: drilling line 11: pulley bracket

13: pillar 14: wire float

16: pulley 17: connector

18: chain 19, 21: flange

22, 23: wall 24: home

25: Lifesaving 26: frustoconical surface

30: veil

The present invention relates to a fairlead pulley and connector for carrying wire ropes and cables secured to the connector on the fairlead pulley.

Special fairlead pulleys and couplers have been satisfactorily used to connect wire loops to the chain and to carry these wire ropes and chains on the fairlead pulley when the wire loops are wound or unwound. One form of pulleys and couplers is described in Wudtke Patent No. 3,842,776, issued October 22, 1974. The device has been used satisfactorily in the form described in a booklet titled "Sagit Mooring System," published by Szaud Woolley, Washington, MD. U.S. Patent No. 3,977,181 describes universal joint connectors for use between cables and chains. The above construction uses a connector with a convex ball-shaped cross section that engages the pulley and prevents twisting damage of the wire rope.

The structure is large in size and uses pulleys designed specifically for handling chains and cables. The heavy chains of long lengths require a large force in the fairlead pulleys and therefore require the shape described in the Woodk patent. In certain cases it may be desirable to use short chains of relatively large diameter capable of supporting a fixed weight suitable for mooring the vessel. The use of shorter chains is less powerful than using Wood's patent, and in this situation it is desirable to provide a compact, simple pair of fairlead pulleys and connectors for handling wire ropes and chains.

An object of the present invention is to reduce the weight and space required for a ferreid pulley by making the connector and the fairlead pulley for connecting the wire rope and the chain conveyed on the pulley relatively small.

Another object of the invention is that the pulley grooves extend radially in a generally V-shaped structure to support the wire rope connectors and the chain and thus to support the chain in the manner as described in Woodk's patent. To provide a paired pulley and a connector through which the chain and wire rope can pass on the pulley, which is reduced.

It is another object of the present invention to provide a fairlead pulley and connector for chain and wire ropes in which the connector is supported along the full length of the pulley and suitably along the full length of the pulley.

Another object of the present invention is to provide a connector having a unitary structure, and the pulley is to allow the chain, the wire rope and the connector to pass through irrespective of the winding angle without damaging the rope.

Another object of the present invention is to use wire rope pulleys for handling wire ropes, chain connectors and chains.

Another object of the present invention is to pulley at any winding angle while allowing the pulley to pass through the chain under light load and to pass the wire rope up to its breaking strength without exhibiting an effect on the service life of the wire rope. It is to provide a connection of chain and wire ropes that can pass through the phase.

Another object of the present invention is to match the shape of the pulley and the connector and to apply a high load on the socket of the coupler coupled to the short bale so that the bale has a side load so as not to damage the wire rope when the socket is in the pulley. To provide fairlead pulleys and connectors that are intended to be supported.

Another object of the present invention is to provide a connector and a fairlead pulley for connecting a wire rope and a chain in which the connector has a unitary structure and the orientation of the socket with respect to its longitudinal axis is not limited when passing through the pulley. .

Another object of the present invention is to provide a connector and a fairlead pulley for connecting the wire rope and the chain, the orientation of the chain in the pulley is not limited when the chain passes through the pulley.

Another object of the present invention is to provide a fairlead pulley and a connector that no longer requires a gap for passage as compared to the chain with which the size of the connector is associated.

Another object of the present invention is to provide a fairlead pulley and a connector which are reduced in size compared to conventional systems when dealing with wire ropes and chains of the same size.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The drawings illustrate exemplary forms of the invention, wherein like numerals indicate like parts.

1 shows a semi-submersible drilling vessel 10 using the present invention. The present invention can be used when the wire rope and the chain are conveyed together onto a pulley, for example, a fairlead pulley. For example, the pulley shown in FIG. 2 or FIG. 3 and its associated support structure can be used for the semi-submersible drill line 10. Brackets indicated by 11 in FIGS. 2 and 3 are supported by pillars or legs of the drilling vessel. These brackets and pulleys are shown horizontally in FIGS. 2 and 3 to compare with human shape. In use, however, the bracket 11 is attached to the vertical part of the column, such as the column 13 of the semi-submersible drill line 10. As will be readily appreciated by those skilled in the art, a large number of anchor lines are used to provide a separate fairlead pulley at each anchor line to secure the drilling line. The pulley bracket and the method of attaching the pulley bracket to the pulley of the drilling vessel do not constitute the present invention and are in a conventional form.

3 shows the relationship of the wire rope when the wire rope 14 is conveyed on the bottom of the pulley groove, and as described later, the angle at which the wire rope or chain is wound relative to the pulley is not limited. If necessary, it may be wound up to 180 °. FIG. 3 also shows the centerline of the chain with respect to the pulley as line 15, which shows the state where the chain is located approximately at the periphery of the pulley as it is wound around the pulley of the chain.

The pulley indicated by (16) is essentially a wire rope pulley wherein the grooves in the pulley extend radially to provide a support for the connector indicated by (17) and the chain indicated by (18).

A groove in the pulley is provided with a pair of radially extending flanges 19 and 21, and opposing sidewalls 22 and 23 of the groove are symmetric with each other. The bottom of the groove has a bottom 24 that is circular or curved, and is sized to accommodate the wire rope 14.

The grooves provided by the opposing walls 22 and 13 have a generally V-shaped structure as shown in the figure, and the opposing walls are enlarged in FIG. At the base of the groove adjacent to the bottom 24, the wall extends outwardly to 22a and 23a. At the top of points 22a and 23a the main part of the groove wall at the top of 22b and 23b respectively is inclined slightly inward at 22b and 23b, respectively. In other words, at positions adjacent to the base of the groove, the flanges 19 and 21 are slightly thicker in order to provide additional strength to the side walls. The cross-sections of the side walls 22b and 23b extend near the ends of the pulley along the enlarged plane as shown in FIG. 10, the ends of the pulley having surfaces 22c and ( 23c) is curved. Sidewalls 22 and 23 extending inwardly close to the grooves 24 at the interior of the points providing surfaces 22c and 23c provide the connector 17 with an efficient support surface. The groove extends outward, but the portion of the flaw that is below the portion that engages the connector does not support the connector. Thus, the portion of the pulley that supports the connector at the maximum diameter of the connector is referred to as the super effective width of the pulley.

According to the present invention, a substantial portion of the connector 17 engages the pulley inward from the maximum effective width of the pulley toward the bottom of the groove. This engaged state is preferably made over the entire length of the connector 17. To facilitate fabrication, opposing walls 22 and 23 are allowed to extend at constant angles in portions 22a and 23a and likewise extend at constant angles in portions 22b and 23b. It is good.

The structure of the connector 17 is approximately truncated conical and its large diameter end is formed into an arc-shaped bale 30. A hole 25 is provided in the connector in a conventional manner, the hole being generally expanded from the small diameter end to the large diameter end so that the connector serves as a rope socket and the wire rope 14 is connected to the connector hole 25. To be fixed in a conventional manner. Sidewalls provided on a plane 90 ° from the bale surface are enlarged in the holes 25 as shown in FIG. In order to provide the strength of the wall of the hole, the portion 25a in contact with the bale extends parallel to the centerline indicated by solid and dashed lines in FIG.

The truncated conical surface 26 of the connector is slightly concave over its entire length, such that the full length of the connector 17 is supported by the sidewalls 22 and 23 of the pulley as shown in FIG. .

According to the present invention, the connector is brought into contact with the sidewall of the groove at the large diameter end of the connector, as shown by 26a in FIG. 7, and this contact state extends a considerable distance from the shortest large diameter part of the connector. The point 26a shown in FIG. 7 is the largest diameter portion of the connector (see FIG. 10). When the chain acting on the bale acts through the short moment arm, the coupler rotates around its large diameter end, which causes the large diameter end to point 26a around point 26b according to the orientation of the coupler in the pulley. It means to include the wall of the cracker that is displayed. The tendency of the connector to rotate about its large diameter end causes wear at this advantage and increases the wear surface, thus allowing the connector to contact the pulley wall along a significant distance extending from its large diameter end toward its small diameter end. Good to do. The range of these wear zones is not dangerous because there is a lot of wear when the worn part is small and less wear when the wear area is big. It is preferable to configure the connector such that the connector can contact the sidewall of the pulley over the entire length of the connector as shown in FIG. The straightness of the coupler is determined at several points along the length of the coupler, and the coupler can provide flexibility by having a slight deviation from the flexible curve that is machined or represented by the exact dimensions, and also provides a constant curvature. It is also possible to provide a flexible surface by the concave curved surface which has machined the outer surface of the connector so as not to follow. When the connector is rotated about its large diameter end by applying a force through the chain, the small diameter end of the connector may be separated from the groove 24. The reaction force exerted by the wire rope 14 prevents the coupler from falling off and prevents the connector from rotating enough to prevent the wire rope 14 from being twisted and damaged in normal operation.

The bale 30 is positioned as close to the large diameter end 26b of the connector as possible to reduce the moment arm through which force from the chain acts on the connector. The center of the hole 30a provided to the bale 30 is preferably located adjacent to the large diameter of the connector, ie the plane extending through the point 26b.

From the large diameter portion of the frustoconical surface of the connector, which is point 26b, the large diameter portion is excised at the portion 27 perpendicular to the veil so that the chain link is connected to the connector at any comparative orientation between the chain link and the connector. Provides a space that can be refracted at a constant angle. When the connector extends from a point at 90 ° angle from the bale to a plane extending through two points 2b, the link bends on the bale plane at an angle greater than that in the plane perpendicular to the bale. Can be. Thus, in order to allow the same deflection in any direction, the connector is excised at an angle of 90 ° from the bale at point 27 on the inclined plane from the bale at points 27 shown in FIGS. To allow for the necessary refraction of the link.

The maximum diameter of the connector, indicated by point 26b, is preferably equal to the maximum effective distance between the sidewalls 22 and 23 of the pulley near the point where curvature 22c and 23c begins. Thus, the pulley can support the connector outside point 26b. As noted above, the sidewalls of the pulley may extend in large dimensions, but the additional pulley walls are not necessary because they do not support the connectors. Additional support for supporting the chain may be provided but such support is not necessary.

As mentioned above, the maximum diameter of the connector and the center of the bale hole 30a are on the maximum effective width of the pulley. In FIG. 10, when the connector rotates by 90 °, the maximum diameter point 26b of the connector comes into contact with the groove inward from where the curvature 23c begins. The connector may extend further in the direction away from the wire rope 14, but the result of this extension is that the bale moves further to the left from the maximum effective width of the pulley, as shown in FIG. This also increases the moment arm at which the chain applies force through it, so that the maximum aperture of the coupler is therefore equal to the maximum effective polar of the pulley so that the bale is as close to the part as possible and forces the connector through it. Minimize the moment arm that acts.

The size of the pulley and the coupler depends on the size of the chain and the coupler to be used. The groove 24 of the pulley base has a form that can accommodate the wire rope in a normal state. The maximum diameter of the connector is equal to the width of the link of the chain 18. This allows the centerline of the chain conveyed around the pulley to approximately coincide with the periphery of the pulley as shown in FIG. This dimension is not limiting, so that if less than the chain, it can be deeply located in the groove. The width of the chain is not wider than the width of the groove, so that the chain can be located in the groove. The width of the chain is smaller than the maximum effective width of the groove, but as large as possible within the range not wider than the width of the groove. A connecting link can be used between the chain and the connector 17 and this link can be made larger than the width of the groove, but this link is held in place by the chain even when larger than the groove.

As can be seen in FIG. 8 the connecting link extends in the tangential direction of the pulley at the maximum effective width of the pulley, and the sides 27 of the coupler are cut out so that the link can extend in this way in any orientation of the connector 17. To be able. Therefore, the winding angle of the system is not limited.

10 shows that at some point the diameter of the connector is determined by the shape of the truncated conical surface 26 of the connector. Referring to FIG. 10, an arc 28 with its center at the center of the pulley is shown with respect to the center line 29. The horizontal line 32 is a curve from the centerline 29 to the point 31 of line 5-5 yarn. The inner walls of the pulley humb taken along line 6-6 of FIG. 10 extend in the tangential direction of the arc 28 from the centerline 29 as shown and meet with the pulley sidewall 22 at point 33. Horizontal line 33 extends toward centerline 29 at point 31 on arc 28. Vertical line 35 extends in direction at point 33 and meets line 34 to form point 36 on the trochlear wall in a plane passing through the trochlear wall parallel to centerline 29. The plane has a cross section 5-5 shown in FIG. By setting a plurality of points, as shown by (37) in FIG. 10, the shape of the pulley wall can be represented in a state perpendicular to the center line 38 of the connector on the plane indicated by the section line 5-5. Next, construct a circle 39 in contact with the line 37 and having a center coincident with the center of the wire rope 14 to cross the circle 39 at the centerline of the connector, i. By measuring the distance to 42), the required diameter of the connector can be determined.

In this method the diameter of the connector can be determined at an accumulated position along the full length of the connector and the stacked points are connected to provide the required shape of the outer surface 26 of the connector. As noted above, the points are not located along a constant curvature and, if desired, the points may be developed to provide a smooth curved concave surface. By this process the centerline of the connector is tangent to a plane parallel to the plane tangential to the base of the groove and spaced therefrom by the radius of the wire rope attached to the connector.

The foregoing description and description of the invention have been described by way of example only, and the size, shape, material, and structure of the details thereof may be varied within the scope of the appended claims without departing from the spirit of the invention. Can be.

Claims (9)

A pulley having a V-shaped groove with approximately the width of the chain to be used and the maximum effective width of the groove, and the radius of the wire rope attached to the connector and in a plane parallel to the plane tangential to the bottom of the groove Consisting of a chain and wire rope connector adapted to be located in the groove, which is spaced therefrom, the connector having a veil at its large diameter end and in the form of a truncated cone, the connector having the groove over almost the entire length of the connector. And the maximum diameter of the connector is approximately equal to the maximum effective width of the groove and the large diameter end of the connector at its sides perpendicular to the bale is cut away from the opposite sides so that the chain link is attached to the bale. Any comparative rotation of the coupler and the chain in tangential direction to the pulley at approximately its maximum effective width And extend the device. 2. A device according to claim 1, wherein the bale is arc-shaped, the center of which forms a chain link receiving hole positioned on a plane below the connector at the maximum diameter of the connector. 3. The wire rope according to claim 1 or 2, wherein the wire rope fixed to the small diameter end of the connector and the center line are conveyed and supported by the pulley in a state substantially coincident with the maximum effective width of the pulley and the width thereof is And a chain combination approximately coincident with the maximum diameter of the connector secured to the bale. A pulley having a V-shaped groove, and a chain and a wire rope located in the groove where the centerline of the connector is in a plane parallel to the plane tangential to the bottom of the groove and is spaced apart from the radius of the wire rope attached to the connector therefrom. Consisting of a connector, the connector having a veil at its large diameter end and having a concave curved surface with a concave surface adjacent to the large diameter end, the groove being substantially at a distance from its large diameter end along the concave curved surface. Engages the concave surface to provide a wear surface, cuts opposing surfaces of the large diameter end of the connector at its sides perpendicular to the bale to allow the chain link to attach to the bale and extend tangentially to the pulley. Device characterized in that. 5. An apparatus according to claim 4, wherein the entire truncated conical outer wall of the body is a concave curved surface. 6. The device according to claim 4 or 5, wherein the bale is shaped like an arc and forms a hole for receiving a chain link whose center is located approximately in the plane of the passage through the maximum diameter of the connector. 6. A combination according to claim 4 or 5, comprising a wire rope fixed to the small diameter end of the connector, and a chain that is carried on the pulley and supported by the pulley and whose width is approximately equal to the maximum diameter of the connector fixed to the bale. Apparatus characterized in that the. In a chain and cable connector, it consists of a generally truncated conical complement with a perforated hole and a bale at its large diameter end, the generally concave outer wall of the body being provided with a concave curved surface, the bale being arcuate and The center forms a chain link receiving hole located in the plane of the maximum diameter of the main body, and at its sides perpendicular to the bale, the large diameter end of the connector is cut from the opposite side so that the chain link can be attached to the bale. And cause the chain link to be deflected at approximately a similar angle to the connector in any comparative orientation of the linkage and the Chenin link. 7. A wire rope according to claim 6, characterized in that it consists of a combination of wire ropes fixed to the globule end of the coupler, and a chain conveyed onto the trolley and supported by the pulley, the width of which is approximately equal to the maximum diameter of the coupler fixed to the bale. Device.

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