Vertical hoisting assembly tool for hot charging of metallurgical back-up roll bushing

Abstract

The invention provides a vertical hoisting assembly tool for hot charging of a metallurgical back-up roll bushing, and belongs to the technical field of metallurgical rolls. The device comprises an annular outer hooping sleeve provided with a first through hole; the lifting hanging bar is mounted on the annular outer hooping sleeve, and a second through hole is formed in the lifting hanging bar; the hanging bar connecting rod is mounted on the hoisting hanging bar; the middle lower wedging ring and the middle upper wedging ring are nested on the inner side of the annular outer hooping sleeve, are of an incompletely-closed circular ring structure and are provided with third through holes for connecting and tensioning the wedging bolts; annular tensioning oil grooves are formed in the inner sides of the inner ring upper tensioning sleeve and the inner ring lower tensioning sleeve, and the inner ring upper tensioning sleeve and the inner ring lower tensioning sleeve are nested in the inner sides of the middle lower wedging ring and the middle upper wedging ring and provided with oil groove oil injection holes used for injecting hydraulic oil. A mechanical tensioning mechanism is formed by tensioning the wedging bolt, the middle lower wedging ring and the middle upper wedging ring, and hydraulic tensioning is formed by injecting high-pressure oil into the annular tensioning oil groove. And zero-loosening combination of the hoisting tool and the roller neck is ensured through mechanical and hydraulic double tensioning force.

Description

Technical Field

[0001] The invention relates to the technical field of metallurgical rolls, in particular to a vertical lifting and assembly tool for hot-installing a metallurgical support roll sleeve. Background Art

[0002] During the sleeve-inserting remanufacturing process for large metallurgical backup rolls, the roll core must be accurately and vertically inserted into the inner bore of the heated roll sleeve to complete the hot assembly. Therefore, the roll core position must remain stable during the hoisting process, and the verticality and height of the roll core must be precisely controlled. Otherwise, the roll core may knock the roll sleeve out of alignment, preventing it from smoothly entering the sleeve inner bore, or the roll sleeve and roll core may prematurely lock, resulting in hot assembly failure, serious production accidents, and heavy economic losses. Large metallurgical backup rolls are large in size and weight, and the roll surface is primarily cylindrical. Current technology makes it difficult to achieve stable, high-precision vertical hoisting without damaging the roll surface. Summary of the Invention

[0003] In light of this, and to address the technical challenges of achieving stable, high-precision vertical lifting without damaging the roll surface under existing technical conditions, the present invention provides a vertical lifting and assembly tool for shrink-fitting metallurgical support rolls. This tool utilizes a mechanical tensioning mechanism formed by tightening wedge bolts, a lower intermediate wedge ring, and an upper intermediate wedge ring. Hydraulic tensioning is achieved by injecting high-pressure oil into an annular tensioning oil groove. This dual mechanical and hydraulic tensioning ensures a zero-loose connection between the lifting tool and the roll neck.

[0004] To achieve the above object, the present invention provides the following technical solutions: A vertical lifting and assembly tool for hot-fitting metallurgical support roller sleeves, comprising: An annular outer tightening sleeve having a first through hole formed therein; A lifting bar, which is used to pass through the first through hole and then be installed on the annular outer clamping sleeve, and has a second through hole formed thereon; A lifting bar connecting rod, adapted to pass through the second through hole and then be mounted on the lifting lifting bar; The middle lower wedge ring and the middle upper wedge ring are nested inside the annular outer clamping sleeve, and are incompletely closed circular ring structures, on which a third through hole for connecting a tightening wedge bolt is processed; The inner ring upper tensioning sleeve and the inner ring lower tensioning sleeve have an annular tensioning oil groove on their inner sides, which are nested in the inner sides of the middle lower wedge ring and the middle upper wedge ring, and are processed with oil groove oil filling holes for injecting hydraulic oil.

[0005] Preferably, the number of the first through holes is 4, and they are symmetrically arranged about the center of the annular outer clamping sleeve; The number of the lifting bars is 2, corresponding to 4 of the first through holes.

[0006] Preferably, the number of the second through holes is 4, and they are symmetrically arranged about the center of the annular outer clamping sleeve; The number of the suspension bar connecting rods is 2, corresponding to 4 second through holes.

[0007] Preferably, a pressure test hole is provided on the inner ring upper tensioning sleeve and / or the inner ring lower tensioning sleeve for controlling the tensioning pressure of the hydraulic oil tank and monitoring whether the pressure of the hydraulic oil tank and pipeline is normal when the tensioning oil tank is filled with oil.

[0008] Preferably, the pressure testing hole is located at the junction of the inner ring upper tensioning sleeve and the inner ring lower tensioning sleeve.

[0009] Preferably, it also includes: The high-pressure hydraulic oil filling system is used to inject high-pressure oil into the tensioning oil groove to trigger the elastic deformation of the inner ring upper tensioning sleeve and the inner ring lower tensioning sleeve.

[0010] Preferably, the high-pressure hydraulic oil filling system includes: The high-pressure hydraulic oil is filled into the oil cup to communicate with the joint of the inner ring upper tensioning sleeve and the inner ring lower tensioning sleeve.

[0011] Preferably, the joints of the inner ring upper tensioning sleeve and the inner ring lower tensioning sleeve are both processed with an oil groove oil filling half hole, and the oil groove oil filling half holes are spliced to form the oil groove oil filling hole.

[0012] Preferably, it also includes: Magnetic digital angle measuring instrument for measuring and displaying verticality deviations.

[0013] Preferably, the outer surfaces of the inner ring upper tensioning sleeve and the inner ring lower tensioning sleeve are conical surfaces, which are used to cooperate with the inner conical holes of the middle lower wedging ring and the middle upper wedging ring to form an inclined surface self-locking mechanism.

[0014] The vertical lifting and assembly tool for shrink-fitting metallurgical support rolls provided by this invention utilizes a mechanical tensioning mechanism formed by tightening wedge bolts, a lower intermediate wedge ring, and an upper intermediate wedge ring. Hydraulic tensioning is achieved by injecting hydraulic oil into an annular tensioning oil groove. This dual mechanical and hydraulic tensioning force ensures a zero-loose connection between the lifting tool and the roll neck. Compared to existing technologies, this tool offers the following advantages: (1) The lifting tool injects high-pressure oil into the annular tensioning oil groove to form a hydraulic tensioning effect. This force acts directly on the roll neck. Due to this design, the lifting tool will not cause any damage to the roll surface quality during the lifting and assembly process, thus ensuring the integrity and quality of the roll surface.

[0015] (2) The mechanical tensioning mechanism uses a design that includes a middle lower wedge ring, a middle upper wedge, and tensioning wedge bolts. This design results in a greater deformation and wedging of the middle lower wedge ring as the weight of the roll or roll shaft increases. As the deformation and wedging increase, the radial stress (clamping force) between the inner ring upper tensioning sleeve, the inner ring lower tensioning sleeve, and the roll neck also increases accordingly. This increased radial stress (clamping force) can effectively prevent damage to the roll surface during the lifting process.

[0016] (3) At the same time, the mechanical tension generated by tightening the wedge bolts and the hydraulic tension generated by the tension sleeve through the hydraulic oil can greatly increase the radial stress (clamping force) between the tension sleeve and the roll neck. This enhanced radial stress (clamping force) can ensure that the lifting tool and the roll shaft are tightly and effectively connected during the lifting and hoisting process, thereby further protecting the roll surface from damage.

[0017] (4) In the design of the lifting device, a pressure gauge can be installed in the hydraulic pipeline to control the tightening pressure of the annular tightening oil tank when the oil tank is filled with oil, and to monitor whether the pressure of the annular tightening oil tank and the pipeline is normal. If there is a large fluctuation or drop in pressure, an early warning can be issued in time and the device can be inspected. In addition, the lifting device is also equipped with a magnetic digital angle measuring instrument, which can display the verticality of the axis of the roller or roller shaft in real time during the vertical lifting process. This design makes it convenient for the operator to control and adjust the position accuracy of the device, ensuring the accuracy and safety of the lifting process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a front view of the present invention; Figure 2 A top view of the present invention; Figure 3 for Figure 1 The enlarged view of the local view at position Ⅰ in the middle; Figure 4 This is a schematic diagram of the inner ring tightening sleeve parts; Figure 5 This is a schematic diagram of the inner ring lower tension sleeve parts; Figure 6 It is a schematic diagram of the annular outer clamp sleeve parts; Figure 7 This is a schematic diagram of the middle lower wedge ring parts; Figure 8 This is a schematic diagram of the middle upper wedge ring part.

[0019] In the figure, 1. annular outer clamping sleeve; 2. high-pressure hydraulic oil filling cup; 3. hydraulic sealing gasket; 4. first hydraulic sealing ring; 5. second hydraulic sealing ring; 6. lifting boom; 7. boom connecting rod; 8. middle upper wedge ring; 9. inner ring upper tensioning sleeve; 10. tightening wedge bolt; 11. magnetic digital angle measuring instrument; 12. middle lower wedge ring; 13. inner ring lower tensioning sleeve; 14. oil tank filling hole; 15. annular tensioning oil tank; 16. pressure test hole. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work shall fall within the scope of protection of the present invention.

[0021] In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", "top / bottom" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limiting the present invention.

[0022] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "mounted / connected," and "connected" should be understood in a broad sense. For example, "connected" can mean 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 an indirect connection through an intermediate medium, and it can be internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0023] like Figure 1-3 As shown, the present invention provides a vertical lifting assembly tool for hot-fitting of metallurgical support roll sleeves, comprising: An annular outer clamping sleeve 1 is provided with a first through-hole. Preferably, the outer clamping sleeve 1 is a monolithic ring structure, located at the outermost layer of the tool, enclosing the inner components. It serves as a lifting fulcrum and constrains the inner tensioning sleeve and wedge ring. The overall structure enhances rigidity and prevents deformation under stress. The transverse first through-hole extends the lifting radius and reduces roll swing.

[0024] The lifting bar 6 is used to pass through the first through hole and then be installed on the annular outer clamping sleeve 1, and a second through hole is opened on the lifting bar 6.

[0025] The lifting bar connecting rod 7 is used to pass through the second through hole and then be installed on the lifting lifting bar 6.

[0026] Among them, the lifting boom 6 is preferably a transverse rod, with both ends inserted into the first through hole of the annular outer clamping sleeve 1 and laterally fixed above the annular outer clamping sleeve 1. The boom connecting rod 7 serves as a vertical connecting rod and is vertically suspended in the second through hole of the lifting boom 6. The lifting boom 6 and the boom connecting rod 7 are respectively used to expand the lifting radius, improve stability and disperse the lifting force, and reduce the shaking of the roller. The combined design of the two increases the lifting radius, can effectively avoid the swing and shaking of the roller core during the lifting process, and improve the position control accuracy of the lifting and hot assembly process.

[0027] The lower middle wedge ring 12 and the upper middle wedge ring 8 are nested inside the annular outer clamping sleeve 1. These rings are partially enclosed and feature a third through-hole for connecting the tensioning wedge bolt 10. The lower middle wedge ring 12 and the upper middle wedge ring 8 form a non-integral ring (cut with a gap of approximately 15 mm) and nest within the annular outer clamping sleeve 1, forming two layers. Each ring features a small through-slot, allowing the diameters of the rings to increase slightly when the tensioning wedge bolt 10 is tightened, achieving tension. When the tensioning wedge bolt 10 is tightened, the wedge rings are pulled toward the center, squeezing the inner tensioning sleeve and providing mechanical tension. The gap design allows for fine-tuning of the diameter, achieving self-locking (heavier rollers produce greater tension). The split structure facilitates installation and removal.

[0028] In the present invention, the tightening wedge bolt 10 is preferably a standard hexagonal head bolt (GB / T 5782-2016), which is used to pass through the third through hole. When tightened, it pulls the upper and lower wedge rings toward each other, triggering mechanical tensioning. The use of the tightening wedge bolt 10 can standardize parts, reduce costs, and accurately control the displacement of the wedge ring.

[0029] In the present invention, the number of the third through holes is preferably 9, which are evenly arranged along the circumference of the wedging ring.

[0030] like Figure 4-8As shown, the inner ring upper tensioning sleeve 9 and the inner ring lower tensioning sleeve 13 have an annular tensioning oil groove 15 on their inner sides, nested inside the middle lower wedge ring 12 and the middle upper wedge ring 8. These sleeves are machined with an oil groove filling hole 14 for injecting hydraulic oil. The inner ring upper tensioning sleeve 9 and the inner ring lower tensioning sleeve 13 are preferably split tapered sleeves (the outer surfaces of the inner ring upper tensioning sleeve 9 and the inner ring lower tensioning sleeve 13 are tapered, mating with the inner tapered holes of the middle lower wedge ring 12 and the middle upper wedge ring 8, forming a ramp self-locking mechanism). They are positioned closely against the roll neck and located inside the middle wedge ring. A half oil groove filling hole is machined at the joint. When the half holes are joined, they form the oil groove filling hole 14, which is used to inject hydraulic oil and remove air from the oil during injection. Hydraulic oil is injected from the oil groove filling hole 14 into the annular tensioning oil groove 15, generating a hydraulic tensioning force that synergizes with mechanical tension to significantly enhance the clamping force. The double tensioning mechanism (mechanical + hydraulic) ensures zero looseness during the lifting process.

[0031] In the present invention, the number of the first through holes is 4, and they are symmetrically arranged about the center of the annular outer clamping sleeve 1; There are two lifting bars 6, corresponding to four first through holes. That is, the lifting bars 6 pass through the first through holes transversely, and each lifting bar 6 corresponds to two first through holes.

[0032] In the present invention, the number of the second through holes is 4, and they are symmetrically arranged about the center of the annular outer clamping sleeve 1; The number of the suspension bar connecting rods 7 is 2, corresponding to 4 second through holes. That is, the suspension bar connecting rods 7 are vertically suspended in the second through holes, and each suspension bar connecting rod 7 corresponds to 2 second through holes.

[0033] In the present invention, pressure test holes 16 are provided on the inner ring upper tensioning sleeve 9 and / or the inner ring lower tensioning sleeve 13. These holes are used to control the hydraulic oil tank tensioning pressure during oil filling and monitor the normal pressure in the hydraulic oil tank and pipelines. Pressure test holes 16 are preferably located at the junction of the inner ring upper tensioning sleeve 9 and the inner ring lower tensioning sleeve 13. A pressure gauge is preferably connected to monitor the hydraulic oil tank tensioning pressure in real time and detect the normal operation of the oil system (e.g., pressure fluctuations or leaks). This ensures the stability of the hydraulic tensioning force and prevents failure of the lifting tool and roller connection due to abnormal oil pressure.

[0034] The present invention also includes: The high-pressure hydraulic oil filling system is used to inject high-pressure oil into the tensioning oil groove to trigger the elastic deformation of the inner ring upper tensioning sleeve 9 and the inner ring lower tensioning sleeve 13.

[0035] In the present invention, the high-pressure hydraulic oil filling system includes: The high-pressure hydraulic oil filling cup 2 is connected to the joint of the inner ring upper tightening sleeve 9 and the inner ring lower tightening sleeve 13, and is used to connect to the complete oil filling channel formed by the oil tank oil filling hole 14, serving as a hydraulic oil injection port to deliver hydraulic oil to the annular tightening oil groove 15.

[0036] The hydraulic sealing gasket 3 is tightly attached to the mounting base of the high-pressure hydraulic oil filling cup 2 and is located between the high-pressure hydraulic oil filling cup 2 and the first hydraulic sealing ring 4. It fills the gap between the oil cup and the base to prevent hydraulic oil leakage during the filling process.

[0037] The first hydraulic sealing ring 4 is located between the hydraulic sealing gasket 3 and the inner annular expansion sleeve oil groove to form the first seal; Second hydraulic sealing ring 5: Nested inside the oil groove of the inner annular expansion sleeve, it adheres closely to the inner wall of the oil circuit, forming a second seal. This double seal blocks oil leakage and ensures that high-pressure oil acts only on the internal oil groove of the expansion sleeve.

[0038] The high-pressure hydraulic oil filling system forms a four-layered sealing protection structure of high-pressure hydraulic oil filling cup 2 → hydraulic sealing gasket 3 → first hydraulic sealing ring 4 → second hydraulic sealing ring 5, which is locked step by step from the outside to the inside.

[0039] The present invention also includes: A magnetic digital angle measuring instrument 11 is used to measure and display verticality deviation. It is preferably magnetically attached to the surface of a lifting tool (such as the annular outer clamping sleeve 1). It displays the verticality deviation of the roll axis in real time (via an LED screen), assisting manual adjustment of the lifting position and ensuring accurate insertion of the roll core into the sleeve.

[0040] The pressure test hole 16 and the magnetic digital angle measuring instrument 11 work together to achieve the following functions: Independent monitoring, joint security assurance: Pressure test hole 16 → monitors the reliability of the internal hydraulic system; Magnetic digital angle measuring instrument 11 → monitors the accuracy of external space posture.

[0041] Complementarity: If the hydraulic pressure is abnormal (such as a sudden drop in pressure), it indicates that the tool and the roller may be loose and the lifting needs to be stopped; if the verticality deviation exceeds the standard, it indicates that the roller position is offset and the lifting angle needs to be adjusted.

[0042] The ultimate goal: to ensure zero collision and zero locking during the hot assembly process through dual monitoring of mechanics and space.

[0043] The collaborative design advantages of the two are as follows: Redundant safety mechanism: Abnormal pressure and verticality deviation serve as warning signals to each other, reducing the risk of assembly accidents.

[0044] Real-time feedback: Pressure data and angle data are available synchronously, supporting quick decision-making and adjustment.

[0045] The two together constitute the core monitoring system of the lifting process, ensuring assembly safety from the dimensions of mechanical bonding strength and spatial positioning accuracy.

[0046] The working principle of the present invention is as follows: The annular outer clamping sleeve 1 is an integral structure, and the clamping sleeve and the wedge ring are non-integral structures (a gap of about 15mm is cut). When the wedge bolt 10 is rotated and tightened, the upper and lower middle wedge rings are tightened and moved toward each other, and the outer conical surfaces of the upper and lower clamping sleeves of the inner ring are compressed to produce elastic deformation. The inner surfaces of the upper and lower clamping sleeves of the inner ring will tighten the roll neck position of the roll. At the same time, the hydraulic expansion sleeve principle is adopted to inject high-pressure hydraulic oil into the oil groove of the annular clamping sleeve to cause the middle part of the clamping sleeve to deform toward the roll neck, further increasing the clamping force between the clamping sleeve and the roll neck surface, ensuring that the roll and the lifting tool are always effectively combined as a whole during the lifting process. At the same time, in order to improve the stability of the lifting process, a third through hole is processed on the inner and outer walls of the annular outer clamping sleeve 1, and a lifting boom 6 and a lifting boom combination are used to increase the lifting radius, which can effectively avoid the swing and shaking of the roll core during the lifting process and improve the position control accuracy of the lifting and hot assembly process. In addition, during the assembly process, the bottom surface of the lifting tool can be used to contact the upper end surface of the roller sleeve to determine the assembly position of the roller shaft and the roller sleeve, thereby avoiding position deviation of the interference fit surface.

[0047] The above description is merely a preferred embodiment of the present invention. However, the scope of protection of the present invention is not limited thereto; any person skilled in the art who, within the technical scope disclosed by the present invention, makes equivalent substitutions or modifications based on the technical solutions and improved concepts of the present invention shall be covered by the scope of protection of the present invention.

Claims

1. A vertical lifting and assembly tool for metallurgical support roller sleeve hot-fitting, characterized in that: include: An annular outer tightening sleeve having a first through hole formed therein; A lifting bar, which is used to pass through the first through hole and then be installed on the annular outer clamping sleeve, and has a second through hole formed thereon; A lifting bar connecting rod, adapted to pass through the second through hole and then be mounted on the lifting lifting bar; The middle lower wedge ring and the middle upper wedge ring are nested inside the annular outer clamping sleeve. They are incompletely closed circular ring structures and are processed with third through holes for connecting tightening wedge bolts. The inner ring upper tensioning sleeve and the inner ring lower tensioning sleeve have an annular tensioning oil groove on their inner sides, which are nested in the inner sides of the middle lower wedge ring and the middle upper wedge ring, and are processed with oil groove oil filling holes for injecting hydraulic oil.

2. A vertical lifting and assembly tool for shrink-fitting of metallurgical support rolls according to claim 1, characterized in that: The number of the first through holes is 4, and they are symmetrically arranged about the center of the annular outer clamping sleeve; The number of the lifting bars is 2, corresponding to 4 of the first through holes.

3. A vertical lifting and assembly tool for shrink-fitting of metallurgical support rolls according to claim 1, characterized in that: The number of the second through holes is 4, and they are symmetrically arranged about the center of the annular outer clamping sleeve; The number of the suspension bar connecting rods is 2, corresponding to 4 second through holes.

4. A vertical lifting and assembly tool for shrink-fitting of metallurgical support rolls according to claim 1, characterized in that: The inner ring upper tensioning sleeve and / or the inner ring lower tensioning sleeve are provided with a pressure test hole for controlling the tensioning pressure of the hydraulic oil tank when filling the tensioning oil tank and monitoring whether the pressure of the hydraulic oil tank and pipeline is normal.

5. A vertical lifting and assembly tool for shrink-fitting of metallurgical support rolls according to claim 4, characterized in that: The pressure testing hole is located at the junction of the inner ring upper tensioning sleeve and the inner ring lower tensioning sleeve.

6. A vertical lifting and assembly tool for shrink-fitting of metallurgical support rolls according to claim 1, characterized in that: Also includes: The high-pressure hydraulic oil filling system is used to inject high-pressure oil into the tensioning oil groove to trigger the elastic deformation of the inner ring upper tensioning sleeve and the inner ring lower tensioning sleeve.

7. A vertical lifting and assembly tool for shrink-fitting of metallurgical support rolls according to claim 5, characterized in that: The high-pressure hydraulic oil filling system includes: The high-pressure hydraulic oil is filled into the oil cup to communicate with the joint of the inner ring upper tensioning sleeve and the inner ring lower tensioning sleeve.

8. The vertical lifting and assembly tool for shrink-fitting of metallurgical support rolls according to claim 1, characterized in that: An oil groove oil filling half hole is processed at the joint of the inner ring upper tensioning sleeve and the inner ring lower tensioning sleeve, and the oil groove oil filling half holes are spliced to form the oil groove oil filling hole.

9. The vertical lifting and assembly tool for shrink-fitting of metallurgical support rolls according to claim 1, characterized in that: Also includes: Magnetic digital angle measuring instrument for measuring and displaying verticality deviations.

10. A vertical lifting and assembly tool for shrink-fitting of metallurgical support rolls according to any one of claims 1 to 9, characterized in that: The outer surfaces of the inner ring upper tensioning sleeve and the inner ring lower tensioning sleeve are conical surfaces for cooperating with the inner conical holes of the middle lower wedging ring and the middle upper wedging ring to form an inclined surface self-locking mechanism.

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