Safe and efficient hoisting tool for ultra-large cylindrical part

Abstract

The invention relates to the technical field of hoisting tools, and discloses a safe and efficient hoisting tool for an ultra-large cylindrical part, which comprises an upper hoisting hollow column, a middle connecting hollow column and a lower supporting seat which are sequentially connected from top to bottom, the upper hoisting hollow column and the middle connecting hollow column are each evenly provided with two or more sets of jacking devices in the circumferential direction, an air cylinder is arranged at a top opening of the upper hoisting hollow column, the tail end of a piston rod of the air cylinder is connected with a middle pull rod, and the jacking devices are movably connected with the middle pull rod. More than two radial sliding grooves are evenly formed in the lower supporting seat in the circumferential direction of the lower supporting seat, and sliding blocks for unloading the cylindrical parts are placed in the sliding grooves and used for clamping the bottom end faces of the cylindrical parts. According to the invention, the stable running track and running posture of the roller in the hoisting process can be realized, so that the hoisting and transferring do not generate large-amplitude swinging and shaking, and the stable, safe and efficient hoisting process can be ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of lifting tools, and more particularly to a safe and efficient lifting tool for super-large cylindrical parts. Background Art

[0002] In energy sectors like nuclear power, petrochemicals, and hydropower, large, thick-walled cylindrical parts serve as core components of critical technical equipment. They are also widely used in the manufacture of liquid or gas storage tanks, pressure vessels, and pipelines. After forging, these parts typically undergo multiple heat treatments, including normalizing and tempering, followed by overall quenching and secondary tempering. Furthermore, these parts require multiple machining operations on both the exterior and interior surfaces using vertical lathes, necessitating frequent lifting and transport throughout the manufacturing process.

[0003] However, the traditional lifting method for ultra-large thick-walled cylindrical parts generally uses horizontal lifting with wire ropes, which not only fails to meet the needs of vertical processing of cylindrical parts, but also has problems such as lifting and unloading difficulties during lifting and transportation, and unstable posture of cylindrical parts during lifting, which easily causes swinging and shaking, affecting production efficiency and posing a huge safety hazard. Summary of the Invention

[0004] In view of this, the present invention provides a safe and efficient lifting tool for super-large cylindrical parts, which can achieve stable roller running trajectory and running posture during the lifting process, so that lifting and transportation will not produce large swings and shakes, and can ensure that the lifting process is smooth, safe and efficient.

[0005] To achieve the above-mentioned purpose, the present invention provides a safe and efficient lifting tool for super-large cylindrical parts, comprising an upper lifting hollow column, an intermediate connecting hollow column and a lower support seat connected in sequence from top to bottom, the upper lifting hollow column and the intermediate connecting hollow column are respectively evenly provided with two or more sets of tightening devices along the circumferential direction, a cylinder is provided at the top opening of the upper lifting hollow column, the end of the piston rod of the cylinder is connected to an intermediate pull rod, and the cylinder and the intermediate pull rod are arranged along the axis direction of the upper lifting hollow column and the intermediate connecting hollow column; The intermediate pull rod is provided with a plunger connecting pull rod sleeve and a position adjusting pull rod sleeve, and the tightening device is movably connected to the intermediate pull rod through the plunger connecting pull rod sleeve and the position adjusting pull rod sleeve; The lower support seat is evenly provided with more than two radial sliding grooves along its circumferential direction. Slide blocks for unloading cylindrical parts are placed in the sliding grooves. The slide blocks for unloading cylindrical parts are used to clamp the bottom end surface of the cylindrical parts.

[0006] Preferably, the bottom end of the intermediate pull rod is connected to a lower pull rod, and an upper tightening sleeve for unloading the cylindrical part, which is movably connected to the slider for unloading the cylindrical part, is provided below the lower support seat. The upper tightening sleeve for unloading the cylindrical part is connected to the lower end of the lower pull rod, and the lower pull rod drives the upper tightening sleeve for unloading the cylindrical part to move up and down so that the slider for unloading the cylindrical part slides along the slide groove to achieve expansion and recovery.

[0007] Preferably, a wedge-shaped groove for accommodating a slider for unloading the cylindrical part is provided on the outer peripheral wall of the upper tightening sleeve for unloading the cylindrical part.

[0008] Preferably, a return spring is sleeved on the lower pull rod, the upper end of the return spring is connected to the lower support seat, and the lower end of the return spring is connected to the upper tightening sleeve for unloading the cylindrical member.

[0009] Preferably, a polyurethane buffer ring is provided at the top end of the upper tightening sleeve for unloading the cylindrical member.

[0010] Preferably, the plunger connecting rod sleeve and the position adjusting rod sleeve are both of a conical structure, and the multiple sets of tightening devices are driven to be deployed and recovered through the inclined peripheral walls of the plunger connecting rod sleeve and the position adjusting rod sleeve.

[0011] Preferably, a lifting bar is passed through the bottom end of the upper hanging hollow column, and a lifting bar connecting rod is passed through the lifting bar.

[0012] Preferably, the tightening device includes a supporting tightening rod and an inner tightening ring, one end of the supporting tightening rod is movably connected to the plunger connecting rod sleeve and the position adjustment rod sleeve, and the other end of the supporting tightening rod is hinged to the inner tightening ring.

[0013] Preferably, the supporting and tightening rod and the inner tightening ring are connected by a connecting pin, so as to press or separate the inner tightening ring from the cylindrical member during operation.

[0014] Preferably, a cylinder control solenoid valve is provided on the upper hanging hollow column, and the cylinder control solenoid valve is connected to the cylinder.

[0015] It can be seen from the above technical solutions that, compared with the prior art, the safe and efficient lifting tool for super-large cylindrical parts provided by the present invention has the following beneficial effects: 1. The hoisting tool of the present invention uses a cylinder to control the stroke of the pull rod sleeve and the pull rod, so that the inner support tightening rod can be freely switched between the hoisting working state (pressing) and the disassembly state (loosening), and the control method is simple and convenient; 2. It is very convenient for lifting and installing and disassembling large cylindrical parts. It can automatically unload the cylindrical parts and quickly remove the lifting tools from the inner hole, avoiding frequent disassembly and installation of slings, and greatly improving work efficiency; 3. The lifting process uses a lifting rod and a connecting rod. The lifting rope has many contact points and a relatively large opening radius. The posture of large cylindrical parts is stable, which can avoid shaking and swinging, and the spatial position can be accurately controlled; 4. The lifting tool can realize vertical lifting without adjusting the position of the cylindrical parts, which is convenient for vertical processing and heat treatment of large cylindrical parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0017] Figure 1 This is a schematic diagram of the overall structure of the safe and efficient lifting tool for super-large cylindrical parts of the present invention; Figure 2 For the present invention Figure 1 Schematic diagram of the AA section; Figure 3 For the present invention Figure 1 Schematic diagram of the middle BB section; Figure 4 For the present invention Figure 1 Schematic diagram of the CC section; Figure 5 For the present invention Figure 1 Schematic diagram of the middle DD section; Figure 6 Schematic diagram of the structure of the upper tightening sleeve for unloading a cylindrical member of the present invention, wherein A is a front perspective view and B is a top perspective view; Figure 7 This is a schematic structural diagram of a slider for unloading a cylindrical member according to the present invention, wherein A is a front perspective view and B is a top perspective view.

[0018] Description of reference numerals: 1-Upper tightening sleeve for unloading cylindrical parts; 2-Lower support seat; 3-Slider for unloading cylindrical parts; 4-Polyurethane buffer ring; 5-Reset spring; 6-Lower pull rod; 7-Middle connecting hollow column; 8-Inner support tightening rod; 9-Connecting pin; 10-Inner tightening ring; 11-Position adjustment pull rod sleeve; 12-Middle pull rod; 13-Upper lifting hollow column; 14-Plunger connecting pull rod sleeve; 15-Lifting boom; 16-Lifting boom connecting rod; 17-Cylinder; 18-Cylinder control solenoid valve 19-Cylinder part. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of an exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0020] Please see the attached Figure 1-7 , which is a safe and efficient lifting tool for super-large cylindrical parts disclosed in the present invention, can ensure the stability of the roller running trajectory and running posture during the lifting process.

[0021] The main body of this safe and efficient lifting tool consists of an upper hoisting hollow column 13, an intermediate connecting hollow column 7, and a lower support base 2, all of which are connected sequentially from top to bottom via their own threaded holes. A cylinder 17 is installed at the top of the upper hoisting hollow column 13, and the end of the piston rod of the cylinder 17 is connected to the intermediate pull rod 12. The cylinder 17 and the intermediate pull rod 12 are arranged along the axis of the upper hoisting hollow column 13 and the intermediate connecting hollow column 7.

[0022] More than two groups of tightening devices are evenly arranged along the circumferential direction of the upper hanging hollow column 13 and the hollow column 7 connected in the middle of the lifting device. Preferably, three groups of tightening devices are provided, and multiple layers of tightening devices are provided along the axial direction of the upper hanging hollow column 13.

[0023] A plunger connecting rod sleeve 14 and a position adjusting rod sleeve 11 are provided on the middle rod 12. The tightening device is movably connected to the middle rod 12 through the plunger connecting rod sleeve 14 and the position adjusting rod sleeve 11. The plunger connecting rod sleeve 14 and the position adjusting rod sleeve 11 are both conical structures. The inclined peripheral walls of the plunger connecting rod sleeve 14 and the position adjusting rod sleeve 11 drive multiple sets of tightening devices to be deployed and recovered.

[0024] Among them, the tightening device consists of an inner supporting tightening rod 8 and an inner tightening ring 10, which are connected by a connecting pin 9 to tighten the inner tightening ring 10 during operation to achieve the lifting of the cylindrical part 19, or to separate the inner tightening ring 10 from the cylindrical part 19 to achieve the unloading of the cylindrical part 19.

[0025] Furthermore, in order to improve the stability of the lifting tool, the lifting lever 15 passes through the upper lifting hollow column 13, and the lifting lever connecting rod 16 passes through the lifting lever 15. The two work together to enable the device to maintain sufficient stability during the lifting process.

[0026] The lower support seat 2 of the lifting device is a whole, and has more than two slide grooves evenly opened along the circumferential direction. The groove openings of the slide grooves are arranged along the radial direction of the support seat 2. The slide grooves are used to place the slider 3 for unloading the cylindrical part. When the unloading slider 3 is placed in the slide groove, the unloading slider 3 can clamp the bottom end face of the cylindrical part 19, thereby supporting the bottom end face of the cylindrical part 19.

[0027] Furthermore, in order to improve the portability of using lifting tools, the unloading slider 3 is positioned as a movable part, and the upper tightening sleeve 1 for unloading the cylindrical part is installed below the lower support seat 2 of the lifting device. The upper tightening sleeve 1 is connected to the lower end of the lower pull rod 6, and the lower pull rod 6 is finally connected to the plunger connecting rod sleeve 14 through the intermediate pull rod 12.

[0028] In this embodiment, there are three sliders 3 for unloading cylindrical parts, which are evenly installed in the slide groove of the lower support seat of the lifting device along the circumference. The outer peripheral wall of the upper tightening sleeve 1 for unloading cylindrical parts is provided with a wedge-shaped groove for accommodating the sliders 3 for unloading cylindrical parts. The relative movement of the upper tightening sleeve 1 for unloading cylindrical parts and the sliders 3 for unloading can adjust the position of the sliders 3 for unloading in the slide groove. The lower pull rod 6 drives the upper tightening sleeve 1 for unloading cylindrical parts to move up and down so that the sliders 3 for unloading cylindrical parts can slide along the slide groove to achieve expansion and recovery.

[0029] Furthermore, in order to reduce the impact of vibration on the lifting tools and extend their service life, a reset spring 5 is provided on the lower pull rod 6, the upper end of the reset spring 5 is connected to the lower support seat 2, and the lower end of the reset spring 5 is connected to the upper tightening sleeve 1 for unloading the cylindrical part. The top end of the upper tightening sleeve 1 for unloading the cylindrical part is provided with a polyurethane buffer ring 4.

[0030] A cylinder control solenoid valve 18 is provided on the upper hanging hollow column 13, and the cylinder control solenoid valve 18 is connected to the cylinder 17. The cylinder control solenoid valve 18 controls the extension and contraction of the cylinder 17, thereby driving the plunger connecting the pull rod sleeve 14, the middle pull rod 12 and the lower pull rod 6 to reciprocate up and down.

[0031] During lifting, the cylinder control solenoid valve 18 controls the cylinder 17, driving the plunger connecting the pull rod sleeve 14, the middle pull rod 12 and the lower pull rod 6 to move downward, so that the tightening device presses the inner wall of the cylindrical part 19, and lifting is achieved under the action of friction. After the lifting is completed, the cylinder 17 controls the plunger connecting the pull rod sleeve 14, the middle pull rod 12 and the lower pull rod 6 to move upward, thereby driving the upper tightening sleeve 1 for unloading the cylindrical part to move upward, so that the slider 3 for unloading the cylindrical part is automatically retracted inward, thereby removing the lifting tool from the inner wall of the cylindrical part 19.

[0032] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A safe and efficient lifting tool for super-large cylindrical parts, characterized in that: It comprises an upper hanging hollow column (13), an intermediate connecting hollow column (7) and a lower support seat (2) which are sequentially connected from top to bottom, the upper hanging hollow column (13) and the intermediate connecting hollow column (7) are respectively and evenly provided with two or more sets of tightening devices along the circumferential direction, a cylinder (17) is provided at the top of the upper hanging hollow column (13), the end of the piston rod of the cylinder (17) is connected to the intermediate pull rod (12), and the cylinder (17) and the intermediate pull rod (12) are arranged along the axial direction of the upper hanging hollow column (13) and the intermediate connecting hollow column (7); The intermediate pull rod (12) is provided with a plunger connecting pull rod sleeve (14) and a position adjusting pull rod sleeve (11), and the tightening device is movably connected to the intermediate pull rod (12) through the plunger connecting pull rod sleeve (14) and the position adjusting pull rod sleeve (11); The lower support seat (2) is provided with two or more radial sliding grooves evenly arranged along its circumferential direction. A slider (3) for unloading a cylindrical part is placed in the sliding groove. The slider (3) for unloading a cylindrical part is used to clamp the bottom end surface of the cylindrical part (19).

2. The safe and efficient lifting tool for super-large cylindrical parts according to claim 1 is characterized in that: The bottom end of the intermediate pull rod (12) is connected to a lower pull rod (6), and an upper tightening sleeve (1) for unloading the cylindrical part, which is movably connected to the slider (3) for unloading the cylindrical part, is provided below the lower support seat (2). The upper tightening sleeve (1) for unloading the cylindrical part is connected to the lower end of the lower pull rod (6). The lower pull rod (6) drives the upper tightening sleeve (1) for unloading the cylindrical part to move up and down, so that the slider (3) for unloading the cylindrical part slides along the slide groove to achieve expansion and recovery.

3. The safe and efficient lifting tool for super-large cylindrical parts according to claim 2 is characterized in that: The outer peripheral wall of the upper tightening sleeve (1) for unloading the cylindrical part is provided with a wedge-shaped groove for accommodating a sliding block (3) for unloading the cylindrical part.

4. The safe and efficient lifting tool for super-large cylindrical parts according to claim 2, characterized in that: A return spring (5) is sleeved on the lower pull rod (6), the upper end of the return spring (5) is connected to the lower support seat (2), and the lower end of the return spring (5) is connected to the upper tightening sleeve (1) for unloading the cylindrical member.

5. The safe and efficient lifting tool for super-large cylindrical parts according to claim 2, characterized in that: A polyurethane buffer ring (4) is provided at the top end of the upper tightening sleeve (1) for unloading the cylindrical member.

6. The safe and efficient lifting tool for super-large cylindrical parts according to claim 1, characterized in that: The plunger connecting rod sleeve (14) and the position adjusting rod sleeve (11) are both conical structures, and the multiple sets of tightening devices are driven to be deployed and recovered through the inclined peripheral walls of the plunger connecting rod sleeve (14) and the position adjusting rod sleeve (11).

7. The safe and efficient lifting tool for super-large cylindrical parts according to claim 1, characterized in that: A lifting bar (15) is passed through the bottom end of the upper hanging hollow column (13), and a lifting bar connecting rod (16) is passed through the lifting bar (15).

8. The safe and efficient lifting tool for super-large cylindrical parts according to claim 1 is characterized in that: The tightening device comprises a supporting tightening rod (8) and an inner tightening ring (10), one end of the supporting tightening rod (8) is movably connected to the plunger connecting rod sleeve (14) and the position adjustment rod sleeve (11), and the other end of the supporting tightening rod (8) is hinged to the inner tightening ring (10).

9. The safe and efficient lifting tool for super-large cylindrical parts according to claim 8, characterized in that: The supporting and tightening rod (8) and the inner tightening ring (10) are connected via a connecting pin (9) to enable the inner tightening ring (10) to press or separate from the cylindrical member (19) during operation.

10. The safe and efficient lifting tool for super-large cylindrical parts according to claim 1, characterized in that: A cylinder control solenoid valve (18) is provided on the upper hanging hollow column (13), and the cylinder control solenoid valve (18) is connected to the cylinder (17).

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