Lifting tool for body with internal flange

Abstract

The invention relates to a device for a lifting mechanism comprising a body (8) of a rigid support structure, means (19) for ensuring the rotation of a lever (10), and means (10) for moving a rod (9), said means (10) being arranged to rotate on a pin (19) by means of at least one hydraulic cylinder (14), said at least one hydraulic cylinder (14) being connected to said lever (10) by a hinge (13) and to said body (8) by a hinge (11), said means (14) for moving the lever (10), and a pin (19). means (9) for pushing the petals (5) radially outwards, these means consisting of a rod (9) for each petal (5), said rod (9) being connected to the lever (10) by a hinge (12) and to the petal (5) by a hinge (20); and means (5) for ensuring the centering of the body (8) with respect to the pipe (2); and also for ensuring the lifting of said pipe (2) by engaging a flange (3) welded to the pipe (2), such means consisting of a rod (9) for each petal (5), said rod (9) being connected to the lever (10) by a hinge (12) and to the petal (5) by a hinge (20). Means (5) consisting of at least three petals (5) whose movement is constrained by at least one sliding block (16) for the petals (5), each of said sliding blocks (16) being slidable in a guide slot (15) machined in the body of the petals (5); and means (16) for ensuring radial movement of the petals (5) relative to the geometric axis of the body (8), said means consisting of at least one sliding block (16) for each petal (5), each of said sliding blocks being slidable in a guide slot (15) machined in the body of the petals (5). The lifting tool (1) for an inner flanged body comprises: means (16) for sliding against the petals (5) in guide slots (15) machined in the body of the petals (5) themselves; and means (6) for ensuring that the petals (5) do not leave their seats during lifting of the petals (5), said means (6) consisting of supports (6) capable of resisting the upward forces generated on the rear faces of the petals (5) during the lifting operation.

Description

Technical Field

[0001] <Description> The patent of the present invention relates to the technical field related to lifting tools (or hoisting tools, lifting tools), and in particular, it is used to lift (or hoist, lift) a body (or main body) having an internal flange. As is known, in the current field of lifting tools, different types of ends (or terminals) for lifting an object with an internal flange exist based on bolt connection or on an openable element that fits under the flange itself.

Background Art

[0002] Bolt connection requires a long time and lacks safety. The existing ones in the market with openable elements have the drawback of not guaranteeing complete centering. Furthermore, they are placed in a sub - optimal position under the flange with respect to the stress on the flange itself, which poses a risk of damaging the flange. Moreover, the active rest angle is often limited, and in this case too, it impairs the stress on the body to be lifted.

Disclosure of the Invention

Problems to be Solved by the Invention

[0003] The object of the present invention is to solve the above and other inconveniences by providing a simple and economical system for forming a low - cost and durable lifting tool, which at the same time enables centering (or centering) the flanged body and lifting it in a balanced state, and avoiding damage by applying the minimum possible stress.

Means for Solving the Problems

[0004] All of these are subject to the features described in the independent claims. Other features of the present invention are subject to the dependent claims.

[0005] The advantages arising from this invention are substantially as follows: The lifting tool is equipped with support means that synchronously engage under the flange, moving radially until it reaches the inner diameter of the pipe, with enough force to move the tool (1) itself until perfect centering is achieved, thus enabling the lifted body to be perfectly centered. In this way, the flange is lifted by applying pressure to its surface portion at a position that ensures stress is minimized, and the support angle is very large in order to minimize stress on the flange. A sufficiently deformable material is interposed between the flange and the lifting petal to ensure the greatest possible uniformity of the contact pressure between the lifting tool and the flange; All of this can be achieved in a simple and economical way.

[0006] The originality and functionality of this invention will be better understood by all experts in the art from the following description, with reference to the accompanying drawings which illustrate non-exclusive or non-exclusive implementation solutions: Figure 1 is a perspective view of a first preferred embodiment of the lifting tool (1), with parts not shown for simplification: it consists of a structure made mainly of steel and preferably lifted by a cable (17).

[0007] The structure includes a main body (8), a petal (or flower petal) (5) shown in a closed configuration, a support (6) that provides upward vertical thrust (or thrust) to the petal during lifting, a pipe (2) structurally connected to the flange (3) by welding or mechanical connection, a point of greater stress (4) on the flange (3) during lifting, the inner surface (18) of the pipe (2), and a sector (7) made of a deformable material to make the contact pressure between the tool and the lower surface of the flange as uniform as possible.

[0008] Figure 2 also shows the lifting tool (1) in a plan view, and for simplification, the parts are not shown.

[0009] The following can be seen: a petal (5) shown in a closed configuration, a support (6) that supports the upward vertical thrust of the petal during lifting, a flange (3), a sector (7) made of deformable material, a pin (19) around which a lever (10) rotates, which is rotatably positioned (or placed in rotation) by a jack (14) to move a rod (9), the rod hinged to the lever at pin (12) and to the petal (5) at pin (20), the displacement of the rod (9) causes the radial movement of the petal (5) to be below the flange (3), and the movement is synchronized because the rods (9) are of the same length and all hinged to the same lever (10) with the same radius of rotation.

[0010] Figure 3 shows the lifting tool (1) again in a plan view, and for simplification, the parts are not shown.

[0011] The following can be seen: the petal (5) is now shown in an open configuration, and a support (6) that supports the upward vertical thrust of the petal during lifting, a flange (3), a sector (7) made of deformable material, a pin (19) around which a lever (10) rotates to be positioned by a jack (14) in order to move the rod (9), the rod hinged to the lever at pin (12) and to the petal (5) at pin (20), the displacement of the rod (9) causes the radial movement of the petal (5) to go under the flange (3), and the rods (9) are of the same length and all hinged to the same lever (10) with the same radius of rotation so that the movement is synchronized. Also visible are a pin (13) that attaches the jack (14) to the lever (10) and a pin (11) that attaches the jack (14) to the body (8).

[0012] Figure 4 shows a perspective view of the pedal (5), and a guide slot (15) is provided at the bottom for sliding the pedal (5) itself in the radial direction.

[0013] Figure 5 shows a cross-sectional view of the lifting tool (1). The main body (8), the pipe (2) connected to the flange (3), the inner surface (18) of the pipe (2), the sector (7) made of deformable material, the pedal (5), the rotating pin (19) of the lever (10), the sliding block (16) that guides the pedal (5), and the lifting cable (17) of the lifting tool (1) can be seen.

[0014] Figure 6 shows a cross-sectional view of a pipe (2) connected to a flange (3), the inner surface (18) of the pipe (2), a sector (7) made of deformable material, a petal (5), a sliding block (16) that guides the petal (5), and a sliding block that engages with a slot (15). A point (4) is also visible where the stress on the flange (3) is greater during lifting. In this lifting configuration, the sector (7) made of deformable material is pushed to the inner cylindrical surface (18) of the pipe (2) to minimize the bending moment and therefore the stress acting on point (4) of the flange (3). For the same purpose, the shape of the sector (7) made of deformable material is designed to conform to the shape of the connection radius between the flange and the inner cylindrical surface (18) of the pipe (2), thereby minimizing the bending moment and therefore the stress acting on point (4) of the flange (3) with the same area of ​​contact surface (or with the same area of ​​contact surface).

[0015] Figure 7 shows a perspective view of the cutting section of the lifting tool (1), and for simplification, the parts are not shown.

[0016] In the open configuration, we can see the pedal (5), the support (6) that provides vertical upward thrust during lifting, the wear element (23) interposed between the pedal (5) and the support (6), and the sector (7) made of a deformable material. Furthermore, to move the rod (9), there is a pin (19) around which a lever (10) rotates, positioned by a jack (14), these rods are hinged to the lever at the pin (12) and to the pedal (5) at the pin (20); at this time, the elements (21) and (22) that move together with the lever (10) and carry the hinge (12) for attaching the rod (9) are located on two different planes in this configuration for spatial reasons.

[0017] However, it should be emphasized that the scope of the present invention is not limited to the drawings accompanying this specification. The purpose of these drawings is solely to clarify and illustrate the operation of the present invention in a quick and understandable manner, and therefore they do not claim to show details of the configuration and can actually be updated, implemented or modified while remaining entirely in the spirit of the invention itself. Furthermore, the terms “up,” “down,” “parallel,” “vertical,” and all terms generally indicating positioning and direction are mentioned only as functioning elements in the drawings and descriptions herein and do not constitute any constraint or limitation on the final configuration of the present invention.

[0018] In a first preferred embodiment, the lifting tool (1) is formed from a body (8) adapted to be lifted by a cable (17). The body (8) is axially centered (or axially centered) and carries a pin (19) around which a lever (10) rotates, the lever being arranged to rotate by at least one hydraulic jack (14), the hydraulic jack being coupled to the lever (10) at a hinge (13) and to the body (8) at a hinge (11). Rods (9) are all of equal length between them (or all of equal distance between hinges), but are also constrained to this lever (10) by a hinge (12), and for spatial reasons, the hinges (12) may be arranged on two parallel planes rather than lying on the same plane. As the lever (10) rotates, the rod (9) moves in a rod-crank type motion, causing a synchronous radial displacement of the pedal (5), which is connected to the rod (9) by a hinge (20). The pedal (5) moves radially, as it is constrained by a guide (16) that engages with a slot (15) machined into the pedal (5) itself. The movement of the pedal (5) is synchronous by geometric shape, as the rods (9) are of the same length, all hinged to the same lever (10) with the same radius of rotation, and the hinges (12) are located in the same plane or in two planes symmetrical with respect to a median plane (or central plane) that coincides with the plane of the hinge (20). When the pedal (5) contacts the inner wall (18) of the pipe (2) with the deformable sector (7) in between, the pedal (5) moves radially to the same extent, and the thrust of the hydraulic jack (14) is sufficient for this purpose, so that the lifting tool (1) moves until it is perfectly centered on the same pipe (2). At this point, lifting can be started by bringing the deformable sector (7) that engages with the underside of the flange (3) closer to the point of maximum stress (4) in order to minimize the same stress.The deformable sector (7), which partially yields under the contact pressure from the lifting, ensures that sufficient uniformity of the same contact pressure is achieved so as to generate the most uniform stress possible along the connecting radius of the flange along the contact arc, and thus so as not to damage the flange. The aforementioned deformable sector (7) has a surface capable of withstanding the weight of the lifting, but is as narrow as possible in order to act in close proximity to the point of maximum stress (4). The upward thrust resulting from the lifting motion and acting on the pedal (5) is supported by the support (6), and the intervening wear element (23) is mounted between the aforementioned support (6) and the pedal (5). The following is the invention as originally described in the application. <Claim 1> A lifting tool (1) for a body with an internal flange, -A rigid support structure, preferably a main body (8) made of steel, -Means (19) for ensuring the rotation of the lever (10), wherein these means consist of a pin (19), the pin being substantially coaxial with the body (8) of the structure and thereby supported by the means (19), -Means (10) for moving the rod (9), these means (10) consist of a lever (10) that is rotatably positioned on the pin (19) by at least one hydraulic cylinder (14), the at least one hydraulic cylinder being connected to the lever (10) by a hinge (13) and to the body (8) by a hinge (11), -Means (14) for moving the lever (10), these means (14) consist of at least one hydraulic cylinder (14), the at least one hydraulic cylinder being connected to the lever (10) by a hinge (13) and to the body (8) by a hinge (11), -Means (9) for pushing the pedal (5) radially outward, these means (9) consist of a rod (9) for each pedal (5), the rod (9) being connected to the lever (10) by a hinge (12) and to the pedal (5) by a hinge (20), -Means (5) for ensuring the centering of the main body (8) with respect to the pipe (2) and for ensuring the lifting of the pipe (2) by engaging with (contacting?) the flange welded to the pipe (2), wherein such means (5) comprises at least three pedals (5), the movement of each pedal (5) is constrained by at least one sliding block (16), and each of such sliding blocks (16) is slidable within a guide slot (15) machined into the body of the pedal (5), -Means (16) for ensuring radial movement of the pedal (5) relative to the geometric axis of the main body (8), wherein these means (16) consist of at least one sliding block (16) for each pedal (5), and each such sliding block (16) is slidable relative to the pedal (5) in a guide slot (15) machined into the main body of the pedal (5) itself, A lifting tool (1) comprising means (6) for ensuring that the pedals (5) do not leave their seats during the lifting of the pedals (5), wherein the means (6) consist of a support (6) capable of resisting an upward force generated on the back of the pedals (5) during the lifting motion. <Claim 2> A lifting tool (1) for an inner flange body according to claim 1, characterized in that a deformable element (7) called a sector is present between each petal (5) and the flange (3) to ensure uniform contact pressure between each petal (5) and the flange (3). <Claim 3> A lifting tool (1) for a body with an inner flange according to claim 1, comprising a hinge (12) connecting the lever (10) and the rod (9), wherein elements (21) and (22) integral with the lever (10) are arranged on two planes, and these planes are symmetrical with respect to a central plane on which the hinge (20) connecting the rod (9) and the pedal (5) is located.

Claims

1. A lifting tool (1) for a body with an inner flange, - A rigid support structure, preferably a main body (8) made of steel, - A pin (19) is substantially coaxial with the main body (8) of the structure, and is thereby supported, ensuring the rotation of the lever (10), - A lever (10) rotated and positioned on the pin (19) by at least one hydraulic cylinder (14) for moving the rod (9), - At least one hydraulic cylinder (14) connected to the lever (10) by a hinge (13) and to the main body (8) by a hinge (11) for moving the lever (10), - A rod (9) for each pedal (5) for pushing the pedal (5) radially outward, wherein the rod (9) is connected to the lever (10) by a hinge (12) and to the pedal (5) by a hinge (20), - At least three pedals (5), the movement of each pedal (5) is constrained by at least one sliding block (16), each of which is slidable within a guide slot (15) machined into the body of the pedal (5), ensuring centering of the body (8) relative to the pipe (2), and ensuring lifting of the pipe (2) by engaging with a flange (3) welded to the pipe (2), - At least one sliding block (16) for each pedal (5), wherein each of the sliding blocks (16) is slidable relative to the pedal (5) within a guide slot (15) machined into the body of the pedal (5) itself, ensuring radial movement of the pedal (5) relative to the geometric axis of the body (8), - A support (6) that can resist the upward force generated on the back of the pedal (5) during the lifting motion, and which ensures that the pedal (5) does not leave its seat during the lifting of the pedal (5), A lifting tool (1) characterized by including the following.

2. A lifting tool (1) for an inner flanged body according to claim 1, characterized in that a deformable element (7) called a sector is present between each petal (5) and the flange (3) to ensure uniform contact pressure between each petal (5) and the flange (3), the shape of the deformable element (7) is such that it conforms to the shape of the connection radius between the flange (3) and the inner cylindrical surface (18) of the pipe (2).

3. A lifting tool (1) for an inner flange body according to claim 1, comprising a hinge (12) connecting the lever (10) and the rod (9), wherein elements (21) and (22) integral with the lever (10) are arranged on two planes, and these planes are symmetrical with respect to a central plane on which the hinge (20) connecting the rod (9) and the pedal (5) is located.

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