Offshore operation hoisting mechanism

Abstract

The utility model relates to the technical field of offshore hoisting, and discloses an offshore operation hoisting mechanism which comprises a main lifting lug, a connecting column is installed at the bottom end of the main lifting lug, a connecting groove is formed in the outer portion of the connecting column, a rotating sleeve is arranged in the connecting groove in a sleeved mode, and steel structure transverse rods are installed on the two sides of the rotating sleeve. Through cooperation of the connecting column, the connecting groove and the rotating sleeve, the main lifting lug and the auxiliary lifting lug are movably connected in a rotating mode, then the situation that a lifted object rotates due to sea wind and indirectly drives a main lifting steel bar to rotate and be wound is reduced, and the elastic effect of the spring is utilized, so that the lifting effect is improved. The extrusion effect that the abutting plate and the protruding block are stacked on the inner wall of the connecting groove is promoted, so that when a hoisted object rotates to be parallel to the wind direction, the rotating friction force between the connecting groove and the rotating sleeve is increased, and the steel structure transverse rod and the auxiliary lifting lug are kept in a relatively stable state as much as possible.

Description

Technical Field

[0001] The utility model relates to the technical field of offshore hoisting, in particular to an offshore operation hoisting mechanism. Background Art

[0002] The hoisting mechanism for offshore steel structure construction is a hoisting mechanism used for offshore steel structure construction. It has been widely used in the field of steel structure hoisting. Since the hoisted object is generally large in structure, it is mainly connected to the main lifting lugs through multiple steel bars during use, and then a hoisting steel structure is used with multiple auxiliary lifting lugs to realize the hoisting work of the hoisted object;

[0003] There are many types of existing lifting mechanisms. When performing lifting operations at sea, the hoisted object is prone to rotate left and right due to the influence of sea waves. Due to the movement of the hoisted object at the bottom, the entire horizontal lifting steel structure is easily caused to rotate, causing multiple main lifting steel bars that are pulled upward to be twisted and entangled with each other, thereby affecting the upward pulling effect of the main lifting steel bars. Therefore, there is room for improvement. Utility Model Content

[0004] The utility model aims to provide an offshore operation hoisting mechanism to solve the problem that the existing operation hoisting mechanism proposed in the above background technology easily causes a plurality of main lifting steel bars on the main lifting lug to be twisted and entangled with each other.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an offshore operation lifting mechanism comprises a main lifting ear, a connecting column is installed at the bottom end of the main lifting ear, and a connecting groove is opened on the outside of the connecting column, a rotating sleeve is arranged inside the connecting groove, and a steel structure cross bar is installed on both sides of the rotating sleeve, and an auxiliary lifting ear is installed on the outside of the bottom end of the steel structure cross bar, and balls are evenly installed on the outside of the bottom end of the rotating sleeve, and a guide groove is opened at the bottom end of the connecting groove below the ball, and the ball rolls along the guide groove, and cavities are provided on both sides of the rotating sleeve close to the inside of the connecting column, and springs are installed inside the cavities, and a pressure rod is installed at one end of the spring, and one end of the pressure rod extends to the outside of the cavity and is installed with a pressure plate, and a protrusion is evenly installed on the side of the pressure plate close to the connecting column, and a groove is evenly opened on the inner wall of the connecting groove on one side of the protrusion, and one side of the protrusion extends to the inside of the corresponding groove.

[0006] Preferably, the connecting column forms a rotating structure with the rotating sleeve through the cooperation of the connecting groove, and the connecting column reduces the rotational friction with the rotating sleeve through the cooperation of the ball bearing and the guide groove.

[0007] Preferably, the pressure plate is an arc-shaped plate, and the curvature of the curved surface of the pressure plate matches the curvature of the curved surface of the inner wall of the connecting groove, and the pressure plate is symmetrically distributed about the central axis of the connecting column.

[0008] Preferably, two protrusions are provided, and three protrusions are provided in each group, and the protrusions are distributed on the pressure plate at equal intervals. When the protrusions abut against the grooves, the pressure plate abuts against the inner wall of the connecting groove.

[0009] Preferably, the grooves are distributed in an annular manner with equal intervals on the connecting groove, and the number of the grooves is four times the number of the protrusions.

[0010] Preferably, a wind pulling mechanism is provided inside the steel structure cross bar, and the wind pulling mechanism includes an air guide hole opened inside the steel structure cross bar, and a fixed rod is installed on the side of the air guide hole away from the rotating sleeve, the outer sleeve of the fixed rod is provided with a flip plate, and a pull rope is installed on the side of the flip plate away from the fixed rod, one end of the pull rope passes through the interior of the cavity and is connected to the end of the pressure rod away from the pressure plate.

[0011] Preferably, the cross-sectional area of ​​the flip plate is smaller than the cross-sectional area of ​​the air guide hole, and the flip plate forms a flip structure with the air guide hole through the cooperation of the fixing rod. The flipping of the flip plate is utilized to pull one end of the pull rope, thereby promoting the compression effect of the spring.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] (1) Through the coordination of the connecting column, the connecting groove and the rotating sleeve, a rotating movable connection relationship is formed between the main lifting ear and the auxiliary lifting ear, thereby reducing the indirect rotation and winding of the main lifting steel bars caused by the rotation of the hoisted object due to the sea breeze, and utilizing the elastic effect of the spring to promote the squeezing effect of the inner wall of the connecting groove of the pressure plate and the convex block accumulation, so that when the hoisted object rotates to be parallel to the wind direction, the rotational friction between the connecting groove and the rotating sleeve is increased, thereby reducing the inertial rotational force of the rotating sleeve, so as to keep the steel structure cross bar and the auxiliary lifting ear in a relatively stable state as much as possible, thereby ensuring the lifting stability of the main lifting steel bars on the main lifting ear;

[0014] (2) The sea breeze exerts a blowing force on the steel structure cross bar. Since the cross section of the flip plate is smaller than the wind guide hole, a pressure difference is generated when the wind passes through the wind guide hole, which in turn promotes the flip plate to flip, which in turn promotes the pull rope to pull the pressure rod to move to the two sides, which in turn further promotes the separation between the pressure plate, the protrusion and the connecting groove and the groove, which in turn facilitates the relative rotation of the auxiliary lifting ear and the main lifting ear. As the position of the steel structure cross bar is parallel to the wind direction, the flipping effect of the flip plate is weakened, thereby contacting the pulling effect on the pressure rod, so as to lock the position of the steel structure cross bar. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 This is a schematic diagram of the main cross-sectional structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the three-dimensional structure of the cross section of the rotating sleeve of the utility model;

[0018] Figure 3 This is a schematic diagram of the three-dimensional structure of the connecting column of the utility model;

[0019] Figure 4 It is a schematic diagram of the three-dimensional structure of the wind-driven mechanism of the utility model.

[0020] Explanation of the reference numerals in the figure: 1. Main lifting ear; 2. Connecting column; 3. Connecting groove; 4. Rotating sleeve; 5. Steel structure cross bar; 6. Auxiliary lifting ear; 7. Wind pulling mechanism; 701. Air guide hole; 702. Fixed rod; 703. Flip plate; 704. Pull rope; 8. Cavity; 9. Spring; 10. Pressure rod; 11. Pressure plate; 12. Bump; 13. Ball; 14. Guide groove; 15. Groove. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1-Figure 4 , the utility model provides an embodiment: an offshore operation hoisting mechanism, comprising a main lifting lug 1, a connecting column 2 is installed at the bottom end of the main lifting lug 1;

[0023] The connecting column 2 forms a rotating structure with the rotating sleeve 4 through the cooperation of the connecting groove 3, and the connecting column 2 reduces the rotational friction with the rotating sleeve 4 through the cooperation of the ball 13 and the guide groove 14;

[0024] Specifically, Figure 1 , Figure 2 and Figure 3As shown, when in use, the steel structure cross bar 5 and the rotating sleeve 4 are subjected to the gravity of the hoisted objects below, so that the bearing pressure between the rotating sleeve 4 and the bottom end of the inner part of the connecting groove 3 is relatively large. By utilizing the function of the ball 13, rolling friction replaces sliding friction, thereby increasing the flexibility of the rotating sleeve 4 and reducing the influence of the rotating sleeve 4 on the position of the connecting column 2;

[0025] A connecting groove 3 is formed on the outside of the connecting column 2, a rotating sleeve 4 is sleeved inside the connecting groove 3, and steel structure cross bars 5 are installed on both sides of the rotating sleeve 4;

[0026] A wind pulling mechanism 7 is provided inside the steel structure cross bar 5, and the wind pulling mechanism 7 includes an air guide hole 701 opened inside the steel structure cross bar 5, and a fixed rod 702 is installed on the side of the air guide hole 701 away from the rotating sleeve 4, and a flip plate 703 is sleeved outside the fixed rod 702, and a pull rope 704 is installed on the side of the flip plate 703 away from the fixed rod 702, and one end of the pull rope 704 passes through the interior of the cavity 8 and is connected to the end of the pressing rod 10 away from the pressing plate 11;

[0027] The cross-sectional area of ​​the flip plate 703 is smaller than the cross-sectional area of ​​the air guide hole 701. The flip plate 703 forms a flip structure with the air guide hole 701 through the cooperation of the fixing rod 702. The flipping of the flip plate 703 is used to pull one end of the pull rope 704, thereby promoting the compression effect of the spring 9.

[0028] Specifically, Figure 1 , 4 As shown, when in use, the penetration effect of the sea breeze on the air guide hole 701 is used to change the pressure on both sides of the flip plate 703, so as to promote the flip plate 703 to produce an unstable swinging effect, and then pull the pull rope 704, so that the pull rope 704 drives the pressure rod 10 to move outward, so as to reduce the squeezing effect of the pressure plate 11 on the inner wall of the connecting groove 3, thereby promoting the rotation effect of the rotating sleeve 4;

[0029] Auxiliary lifting ears 6 are installed on the outer side of the bottom end of the steel structure cross bar 5, and balls 13 are evenly installed on the outer side of the bottom end of the rotating sleeve 4, and a guide groove 14 is opened at the bottom end of the connecting groove 3 below the ball 13, and the ball 13 rolls along the guide groove 14. Cavities 8 are provided on both sides of the rotating sleeve 4 close to the inside of the connecting column 2, and springs 9 are installed inside the cavities 8, and a pressure rod 10 is installed at one end of the spring 9, and one end of the pressure rod 10 extends to the outside of the cavity 8 and is installed with a pressure plate 11;

[0030] The pressing plate 11 is an arc-shaped plate, and the curvature of the curved surface of the pressing plate 11 matches the curvature of the curved surface of the inner wall of the connecting groove 3, and the pressing plate 11 is symmetrically distributed about the central axis of the connecting column 2;

[0031] The side of the pressing plate 11 close to the connecting column 2 is evenly equipped with bumps 12;

[0032] There are two protrusions 12, and three protrusions are arranged in each group. The protrusions 12 are distributed at equal intervals on the pressing plate 11. When the protrusions 12 abut against the grooves 15, the pressing plate 11 abuts against the inner wall of the connecting groove 3.

[0033] The inner wall of the connection groove 3 on one side of the protrusion 12 is evenly provided with grooves 15, and one side of the protrusion 12 extends to the inside of the corresponding groove 15;

[0034] The grooves 15 are distributed in an annular manner with equal spacing on the connecting groove 3, and the number of the grooves 15 is four times the number of the protrusions 12;

[0035] Specifically, Figure 1 , Figure 2 and Figure 3 As shown, when the steel structure cross bar 5 is rotated to be parallel to the wind direction, the elastic reset of the spring 9 promotes the pressing plate 11 and the protrusion 12 to squeeze the inner wall of the connecting groove 3 to increase the friction between the rotating sleeve 4 and the connecting column 2, thereby hindering the rotation of the rotating sleeve 4 to a certain extent. Under the upward pulling action of the main lifting steel bars, the stability of the hoisted object below is further stabilized.

[0036] Working principle: When the utility model is in use, the lifting rope and the hoisting object are first connected through the auxiliary lifting ear 6, and then the main lifting steel bar on the main lifting ear 1 is used to realize the lifting of the hoisting object. During the lifting process, when the offshore wind blows the hoisting object and causes it to rotate, the wind blows synchronously to the air guide hole 701 and penetrates along the gap between the air guide hole 701 and the flip plate 703. Due to the penetration of the wind, the flow rate increases, and then a pressure difference is generated on both sides of the flip plate 703, and then the flip plate 703 is flipped along the fixed rod 702;

[0037] Secondly, due to the flipping of the flip plate 703, the pull rope 704 is pulled to move the pull rope 704 outward, and then the other end of the pull rope 704 pulls the pressure rod 10 outward, which promotes the compression of the spring 9, so that the pressure plate 11 and the protrusion 12 move outward synchronously, thereby reducing the friction contact between the rotating sleeve 4 and the inner wall of the connecting groove 3, so as to promote the rotation of the rotating sleeve 4, thereby reducing the rotation of the main lifting ear 1 caused by the rotation of the hoisting object, and reducing the twisting and winding of the main lifting steel bar;

[0038] Finally, as the steel structure cross bar 5 rotates, the flip plate 703 gradually becomes parallel to the wind direction, reducing the penetration of wind force in the air guide hole 701, so that the flip plate 703 remains stable, and the pulling force of the pull rope 704 disappears, and then the pressure rod 10 is promoted to reset under the elastic action of the spring 9, so that the protrusion 12 is inserted into the corresponding groove 15, and the squeezing friction between the pressure plate 11 and the protrusion 12 on the connecting groove 3 is utilized to increase the resistance between the rotating sleeve 4 and the connecting column 2, thereby weakening the inertia of the rotating sleeve 4, so as to promote the position stability of the steel structure cross bar 5.

[0039] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A lifting mechanism for offshore operations, comprising a main lifting lug (1), characterized in that: A connecting column (2) is installed at the bottom end of the main lifting ear (1), and a connecting groove (3) is provided on the outside of the connecting column (2), a rotating sleeve (4) is sleeved inside the connecting groove (3), and steel structure cross bars (5) are installed on both sides of the rotating sleeve (4), and auxiliary lifting ears (6) are installed on the outside of the bottom end of the steel structure cross bars (5), and balls (13) are evenly installed on the outside of the bottom end of the rotating sleeve (4), and a guide groove (14) is provided at the bottom end of the connecting groove (3) below the ball (13), and the ball (13) rolls along the guide groove (14), and the rotating sleeve (4) is provided with a connecting column (2) on the outside of the connecting column (2), and a connecting column (3) on the inside of the connecting column (2) is provided with a connecting column (3), and the connecting column (3) rolls along the guide groove (14). The movable sleeve (4) is provided with cavities (8) on both sides close to the interior of the connecting column (2), and springs (9) are installed inside the cavities (8), one end of the spring (9) is installed with a pressure rod (10), and one end of the pressure rod (10) extends to the outside of the cavity (8) and is installed with a pressure plate (11), a protrusion (12) is evenly installed on one side of the pressure plate (11) close to the connecting column (2), and the inner wall of the connecting groove (3) on one side of the protrusion (12) is evenly provided with a groove (15), and one side of the protrusion (12) extends to the inside of the corresponding groove (15).

2. The offshore hoisting mechanism according to claim 1, characterized in that: The connecting column (2) forms a rotating structure with the rotating sleeve (4) through the cooperation of the connecting groove (3), and the connecting column (2) reduces the rotational friction with the rotating sleeve (4) through the cooperation of the ball (13) and the guide groove (14).

3. The offshore hoisting mechanism according to claim 1, characterized in that: The pressure plate (11) is an arc-shaped plate, and the curvature of the curved surface of the pressure plate (11) matches the curvature of the curved surface of the inner wall of the connecting groove (3). The pressure plate (11) is symmetrically distributed about the central axis of the connecting column (2).

4. The offshore hoisting mechanism according to claim 1, characterized in that: Two protrusions (12) are provided, and three protrusions are provided in each group. The protrusions (12) are distributed at equal intervals on the pressure plate (11). When the protrusions (12) abut against the grooves (15), the pressure plate (11) abuts against the inner wall of the connecting groove (3).

5. The offshore hoisting mechanism according to claim 1, characterized in that: The grooves (15) are distributed in an annular manner at equal intervals on the connecting groove (3), and the number of the grooves (15) is four times the number of the protrusions (12).

6. The offshore hoisting mechanism according to claim 1, characterized in that: A wind pulling mechanism (7) is arranged inside the steel structure cross bar (5), and the wind pulling mechanism (7) includes an air guide hole (701) opened inside the steel structure cross bar (5), and a fixing rod (702) is installed on the side of the air guide hole (701) away from the rotating sleeve (4), and a flip plate (703) is arranged on the outside of the fixing rod (702), and a pull rope (704) is installed on the side of the flip plate (703) away from the fixing rod (702), and one end of the pull rope (704) passes through the interior of the cavity (8) and is connected to one end of the pressure rod (10) away from the pressure plate (11).

7. The offshore hoisting mechanism according to claim 6, characterized in that: The cross-sectional area of ​​the flip plate (703) is smaller than the cross-sectional area of ​​the air guide hole (701). The flip plate (703) forms a flip structure with the air guide hole (701) through the cooperation of the fixing rod (702). The flipping of the flip plate (703) is used to pull one end of the pull rope (704), thereby promoting the compression effect of the spring (9).

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