CN117945257B - A lifting device for crane suitable for coil material handling - Google Patents

Abstract

The present invention relates to a lifting device for a crane suitable for handling coiled materials in the field of crane lifting technology, comprising a lifting cylinder and a lifting cylinder, wherein the upper section of the inner cavity of the lifting cylinder is provided with a lifting seat coaxial therewith, and the top of the lifting seat is connected to the crane wire rope; the outer periphery of the lifting seat is provided with a plurality of upper and lower inclined push rods evenly spaced along its circumference, and the outer ends of the push rods are higher than the inner ends; the outer ends of the push rods movably penetrate the lifting cylinder along the radial surface, and are correspondingly hinged with an arc-shaped push plate; the arrangement of the lifting seat, the push rod and the arc-shaped push plate of the present invention can, when descending, cause the outer end of the push rod to deviate inwardly under the action of gravity, so that the lifting device can smoothly enter the inner cavity of the coiled material, and when lifting, under the action of the lifting seat, the outer end of the push rod deviates outwardly to support the inner wall of the coiled material, thereby completing the lifting operation of the vertical coiled material without human participation.

Description

A lifting device for crane suitable for coil material handling

Technical Field

The invention relates to the technical field of crane hoisting, and in particular to a crane hoisting device suitable for coil material transportation.

Background technique

The rolled coil generally comprises a winding drum and a coil wound around the outer periphery of the winding drum, wherein the outer portion of the coil is fixed by a fixing belt or other structure to prevent the coil from unwinding automatically.

Under some special process requirements, such as during the transportation of steel coils, the steel coils need to be placed vertically (with the central axis vertical) to ensure the stability of the steel coils. If the steel coils are placed horizontally (with the central axis horizontal), in the case of emergency braking, the steel coils are likely to roll over the limit blocks, causing major accidents. Therefore, a lifting device that can lift the coils vertically is needed.

A Chinese patent (publication number: CN212101607U) discloses a lifting device for vertically lifting pipe fittings; however, the lifting device uses a lifting seat to hook the bottom of the pipe fitting and applies force to the outer side of the bottom of the pipe fitting to achieve the lifting operation. However, the outer bottom of the rolled coil cannot be subjected to force, otherwise the coil is easily deformed, so the lifting device cannot be adapted to the lifting operation of the coil; and before lifting, the pipe fitting needs to be pre-placed on a pad before the operation can be carried out, which invisibly increases the workload of lifting.

A Chinese patent (Announcement No.: CN215516362U) discloses a vertical lifting auxiliary device; the auxiliary device is connected by a plurality of corresponding pivotal clamping structures to form a clamping space, from which it can be known that the auxiliary device realizes the lifting operation of the lifted object by clamping the lifted object from the outside to the inside. Then, due to the special structure of the coil (rolled together in circles), it is easy to cause the outer layer of the coil to be misaligned with the inner layer of the coil when clamped from the outside, thus affecting the quality of the coil, and the friction between the clamping structure and the coil is opposite to the direction of the gravity of the coil, so the coil is easy to slide downward under the action of gravity, which poses a great safety hazard.

For this purpose, we have designed a lifting device for cranes suitable for coil handling.

Summary of the invention

In order to overcome the deficiencies in the background technology, the present invention discloses a lifting device for a crane suitable for coiled material handling.

In order to achieve the above-mentioned invention object, the present invention adopts the following technical scheme:

A lifting device for a crane suitable for coil handling, comprising a lifting cylinder and a lifting cylinder, wherein the upper section of the inner cavity of the lifting cylinder is provided with a lifting seat coaxial therewith, and the top of the lifting seat is connected to a crane wire rope; the outer periphery of the lifting seat is provided with a plurality of vertically inclined push rods uniformly spaced along its circumference, and the outer ends of the push rods are higher than the inner ends; the outer ends of the push rods are movable along the radial surface to penetrate the lifting cylinder, and are correspondingly hinged with arc-shaped push plates;

Two reduced diameter parts are arranged at intervals in the lower section of the inner cavity of the lifting cylinder, and the upper end of the lifting cylinder is located between the two reduced diameter parts and is provided with a cover plate; an inverted conical block is movably fitted in the inner cavity of the lifting cylinder, and the conical block is evenly spaced along its circumference and has a plurality of slide grooves arranged along its generatrix direction, and the slide grooves are slidably connected with supporting rods along their radial directions, and the outer end of the supporting rod slides out of the lifting cylinder, and the bottom surface of the outer end portion of the supporting rod is an inclined surface, and the height of the inclined surface is gradually reduced from the outside to the inside.

Preferably, the push rod is provided with a waist-shaped groove running horizontally through the length direction thereof, and the lifting cylinder is provided with a limit pin running through the waist-shaped groove.

Preferably, an inwardly bent connecting frame is provided at the bottom of the arc-shaped top pressure plate, and the bent connecting frame is rotatably connected to an auxiliary roller.

Preferably, the outer surface of the arc-shaped top pressure plate is provided with an anti-slip layer.

Preferably, a limit plate is provided in the inner cavity of the lifting cylinder at a position corresponding to the position above the lifting seat, and a third compression spring is provided between the limit plate and the lifting seat.

Preferably, a through hole for the crane wire rope to pass through is provided in the middle of the limit plate.

Preferably, the bottom of the lifting cylinder and the bottom of the conical block are provided with flexible structures.

Preferably, a second compression spring is provided between the top surface of the conical block and the cover plate.

Preferably, a first compression spring is provided between the cover plate and the upper reduced diameter portion.

Due to the adoption of the above-mentioned technical solution, the present invention has the following beneficial effects:

1. The arrangement of the lifting seat, the top pressure rod and the arc-shaped top pressure plate enables the outer end of the top pressure rod to deflect inwards under the action of gravity when descending, so that the lifting device can smoothly enter the inner cavity of the coil, and when lifting, under the action of the lifting seat, the outer end of the top pressure rod deflects outwards to support the inner wall of the coil, thereby completing the lifting operation of the vertical coil without human participation;

2. The arrangement of the lifting cylinder, the conical block and the supporting rod enables the lifting cylinder to drive the supporting rod to move downward to the bottom of the coil under the action of gravity after the coil is lifted, and the conical block pushes the supporting rod outward so that the outer end of the supporting rod moves below the bottom surface of the coil to support the sliding coil to prevent it from falling. At the same time, when falling, the conical block and the lifting cylinder rise relative to the lifting cylinder in turn, thereby recovering the supporting rod to the inner cavity of the coil, so that the coil lands smoothly.

3. The setting of the bending connection frame and the auxiliary roller can reduce the friction between the arc-shaped top pressure plate and the inner wall of the coil when descending, so that the lifting device can descend smoothly in the inner cavity of the coil.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 is a schematic diagram of the structure of the present invention;

Fig. 2 is a front view of the present invention;

FIG3 is a schematic diagram of the present invention in a falling posture before lifting;

FIG4 is a schematic diagram of the present invention after landing;

FIG. 5 is a schematic diagram of the present invention in a lifting posture.

In the figure: 1. lifting cylinder; 11. reduced diameter portion; 12. limit pin; 13. limit plate; 14. third compression spring; 2. lifting seat; 3. top pressure rod; 31. waist-shaped groove; 4. arc-shaped top pressure plate; 41. bending connecting frame; 42. auxiliary roller; 5. lifting cylinder; 51. cover plate; 6. first compression spring; 7. conical block; 71. slide groove; 8. second compression spring; 9. supporting rod.

Detailed ways

The present invention can be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention. In the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "front", "back", "left", "right", etc. indicating directions or positional relationships, they only correspond to the drawings of the present application for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific direction.

Embodiment 1, in conjunction with Figures 1-5, a lifting device for a crane suitable for coil handling includes a lifting cylinder 1 and a lifting cylinder 5. The upper part of the inner cavity of the lifting cylinder 1 is provided with a lifting seat 2 coaxial therewith, and the top of the lifting seat 2 is connected to the crane wire rope; in this way, the lifting cylinder 1 will not tilt during lifting. The outer periphery of the lifting seat 2 is evenly spaced along its circumference and is provided with a plurality of upward and downward tilted push rods 3, and the outer end of the push rod 3 is higher than the inner end;

As needed, a limit plate 13 is provided in the inner cavity of the lifting cylinder 1 at a position corresponding to the position above the lifting seat 2, and a third compression spring 14 is provided between the limit plate 13 and the lifting seat 2; that is, when the lifting seat 2 rises to a certain height relative to the lifting cylinder 1, it will no longer continue to rise due to the restriction of the limit plate 13 and the third compression spring 14, thereby ensuring that the outer end of the push rod 3 is higher than its inner end.

Specifically, a through hole is provided in the middle of the limiting plate 13 for the crane wire rope to pass through.

The outer end of the push rod 3 movably penetrates the lifting cylinder 1 along the radial surface, and is correspondingly hinged with an arc-shaped push plate 4;

Two reduced diameter parts 11 are provided at intervals in the lower section of the inner cavity of the lifting cylinder 1. As required, the upper reduced diameter part 11 can be a stop ring welded on the inner wall of the lifting cylinder 1, and the lower reduced diameter part 11 can be bolted to the annular end cover at the bottom of the lifting cylinder 1. The upper end of the lifting cylinder 5 is located between the two reduced diameter parts 11 and is provided with a cover plate 51. Specifically, the diameter of the cover plate 51 is larger than the diameter of the lifting cylinder 5, and the lower end of the lifting cylinder 5 extends out of the lifting cylinder 1; the inner cavity of the lifting cylinder 5 is movably matched with an inverted conical block 7, and as required, the lower end of the conical block 7 is set to be flat. The conical block 7 is evenly spaced along its circumference and provided with a plurality of slide grooves 71 along its generatrix direction, and the slide groove 71 is slidably connected to a support rod 9 along its radial direction. The outer end of the support rod 9 slides out of the lifting cylinder 5, and the bottom surface of the outer end of the support rod 9 is an inclined surface, and the height of the inclined surface is gradually reduced from the outside to the inside.

When in use, the lifting device is lifted by a crane wire rope, and then the lower end of the lifting device is inserted into the inner cavity of the vertically placed coiled material. Since the bottom surface of the outer end of the supporting rod 9 is an inclined surface, the supporting rod 9 moves inwardly under the action of the top surface of the winding drum and the gravity of the lifting device. At the same time, the conical block 7 overcomes its own gravity and moves upward. As the supporting rod 9 moves inward to a certain extent, the supporting rod 9 enters the inner cavity of the winding drum until the arc-shaped top pressure plate 4 contacts the winding drum. Under the action of the top surface of the winding drum and the gravity of the lifting device, the outer end of the top pressure rod 3 flips upward. As the outer end of the top pressure rod 3 flips upward to a certain extent, the top pressure rod 3 and the arc-shaped top pressure plate 4 enter the inner cavity of the winding drum until the bottom of the lifting drum 5 contacts the ground. Then the crane wire rope is used to pull the lifting seat 2 upward, and the lifting seat 2 rises. The arc-shaped top pressure plate 4 tends to flip over. At this time, the arc-shaped top pressure plate 4 has a tendency to move outward, and then the arc-shaped top pressure plate 4 tightly supports the inner wall of the winding drum, and the greater the weight of the lifting device and the coil, the greater the outward support force of the arc-shaped top pressure plate 4 on the inner wall of the winding drum, so that the winding drum can be effectively prevented from sliding outward. At the same time, with the rise of the lifting drum 1 and the coil, the lifting drum 5 moves downward under the action of gravity, and the lifting drum 5, the conical block 7 and the supporting rod 9 move downward, so that the supporting rod 9 moves to the bottom of the coil, and the conical block 7 descends relative to the lifting drum 5 and pushes the supporting rod 9 outward, so that the outer end of the supporting rod 9 extends below the bottom surface of the coil. At this time, when the coil slides downward relative to the arc-shaped top pressure plate 4, the supporting rod 9 can support the bottom surface of the coil to prevent the bottom surface of the coil from further sliding down, thereby preventing the coil from falling.

When lowering the coil, since the conical block 7 first contacts the bottom surface, the conical block 7 rises relative to the lifting cylinder 5, thereby driving the supporting rod 9 to move inward until the outer end of the supporting rod 9 moves to the inner side of the inner wall of the winding cylinder; at this time, the lifting cylinder 5 begins to contact the ground and moves upward relative to the lifting cylinder 1 until the coil touches the ground.

As required, in order to ensure that the lifting cylinder 5 moves downward smoothly during the lifting process so that the supporting rod 9 moves correspondingly to the bottom of the coil, a first compression spring 6 is provided between the cover plate 51 and the upper reduced diameter portion 11 .

As needed, in order to ensure that during the lifting process, the conical block 7 moves downward smoothly so that the supporting rod 9 can move outward and the outer end of the supporting rod 9 moves below the bottom surface of the coil, a second compression spring 8 is provided between the top surface of the conical block 7 and the cover plate 51.

Furthermore, in order to prevent the lifting device from causing damage to the ground, a flexible structure is provided at the bottom of the lifting cylinder 5 and the bottom of the conical block 7.

Furthermore, in order to increase the friction coefficient between the arc-shaped top pressure plate 4 and the vertical coiled material and ensure that the vertical coiled material can be lifted better, an anti-skid layer is provided on the outer surface of the arc-shaped top pressure plate 4.

Embodiment 2, in combination with Figures 1-5, a lifting device for a crane suitable for coil handling, based on embodiment 1, is provided with an inwardly bent connecting frame 41 at the bottom of the arc-shaped top pressure plate 4, and the bent connecting frame 41 is rotatably connected to an auxiliary roller 42; such a configuration enables the arc-shaped top pressure plate 4 to rotate when the lifting drum 1 is located in the inner cavity of the winding drum and descends due to the friction between the arc-shaped top pressure plate 4 and the winding drum, thereby causing the auxiliary roller 42 to replace the arc-shaped top pressure plate 4 and contact the inner wall of the winding drum, and the original sliding friction is converted into rolling friction, thereby preventing the arc-shaped top pressure plate 4 and the inner wall of the winding drum from affecting the falling action of the lifting drum 1 due to the large friction force, thereby making the operation smoother.

Furthermore, in order to prevent the push rod 3 from radial shaking, the push rod 3 is provided with a waist-shaped groove 31 running horizontally along its length direction, and the lifting cylinder 1 is provided with a limit pin 12 running through the waist-shaped groove 31; such a setting can radially limit the push rod 3 through the limit pin 12, thereby preventing the push rod 3 from radial deviation.

In the example, the number of the push rods 3 and the support rods 9 may be three, four or five, and the specific number is set according to actual needs and is not specifically limited here.

The parts of the present invention that are not described in detail are prior art. It is obvious to those skilled in the art that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention; therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and it is intended that all changes that fall within the meaning and scope of equivalent elements are included in the present invention.

Claims (6)

1. A lifting device for a crane suitable for handling coiled materials, characterized in that it comprises a lifting cylinder (1) and a lifting cylinder (5), wherein the upper section of the inner cavity of the lifting cylinder (1) is provided with a lifting seat (2) coaxial therewith, and the top of the lifting seat (2) is connected to a crane wire rope; the outer periphery of the lifting seat (2) is provided with a plurality of upward and downward inclined push rods (3) at evenly spaced intervals along its circumference, and the outer end of the push rod (3) is higher than the inner end; the push rod (3) is provided with a waist-shaped groove (31) penetrating horizontally along its length direction, and the lifting cylinder (1) is provided with a limit pin (12) penetrating the waist-shaped groove (31), so as to facilitate radial limitation of the push rod (3) by the limit pin (12) to prevent radial shaking of the push rod (3); the inner cavity of the lifting cylinder (1) corresponds to the position of the push rod (3) located above the lifting seat (2) A limit plate (13) is provided at the position, and a third compression spring (14) is provided between the limit plate (13) and the lifting seat (2) to limit the height of the lifting seat (2), so that the inner end of the push rod (3) is always in a posture lower than its outer end, and then under the action of the overall gravity, the outer end of the push rod (3) shrinks due to rotation, so that the push rod (3) enters the inner cavity of the coiled material; the outer end of the push rod (3) moves along the radial surface to penetrate the lifting cylinder (1), and is correspondingly hinged with an arc-shaped push plate (4), and the bottom of the arc-shaped push plate (4) is provided with an inward bending connection frame (41), and the bending connection frame (41) is rotatably connected with an auxiliary roller (42) so as to contact the inner wall of the winding cylinder through the auxiliary roller (42), so that the push rod (3) and the arc-shaped push plate (4) can descend smoothly; The lower section of the inner cavity of the lifting cylinder (1) is provided with two reduced diameter parts (11) at intervals, and the upper end of the lifting cylinder (5) is located between the two reduced diameter parts (11) and is provided with a cover plate (51); the inner cavity of the lifting cylinder (5) is movably matched with an inverted conical block (7) up and down, and the conical block (7) is evenly spaced along its circumference and provided with a plurality of slide grooves (71) along its generatrix direction, and the slide groove (71) is slidably connected to a supporting rod (9) along its radial direction, and the outer end of the supporting rod (9) slides out of the lifting cylinder (5), and the bottom surface of the outer end of the supporting rod (9) is an inclined surface, and the inclined surface extends from the outside to the inside. The height is gradually lowered so that the supporting rod (9) contracts under the reaction force of the coil before lifting and drives the conical block (7) to rise, and the conical block (7) descends under the action of gravity during lifting and drives the supporting rod (9) to expand; the lower end of the lifting cylinder (5) extends out of the lifting cylinder (1) so that the lifting cylinder (5) rises relative to the lifting cylinder (1) by contacting the ground before lifting, and the lifting cylinder (5) carrying the conical block (7) and the supporting rod (9) descends relative to the lifting cylinder (1) and the coil under the action of gravity during lifting, so that the supporting rod (9) moves below the bottom surface of the coil to support the coil. 2. A lifting device for a crane suitable for coil handling according to claim 1, characterized in that an outer surface of the arc-shaped top pressure plate (4) is provided with an anti-slip layer. 3. A lifting device for a crane suitable for coiled material handling according to claim 1, characterized in that a through hole is provided in the middle of the limit plate (13) for the crane wire rope to pass through. 4. A lifting device for a crane suitable for coiled material handling according to claim 1, characterized in that a flexible structure is provided at the bottom of the lifting cylinder (5) and the bottom of the conical block (7). 5. A lifting device for a crane suitable for coil handling according to claim 1, characterized in that a second compression spring (8) is provided between the top surface of the conical block (7) and the cover plate (51). 6. A lifting device for a crane suitable for coil material handling according to claim 1, characterized in that a first compression spring (6) is provided between the cover plate (51) and the upper reduced diameter portion (11).