Large metallurgical roller sleeve vertical hoisting tool

Abstract

The invention relates to the technical field of metallurgical roller sleeve hoisting tools, and discloses a large metallurgical roller sleeve vertical hoisting tool which comprises an upper hoisting hollow column, a hollow connecting pipe and a bottom hollow supporting frame which are sequentially connected from top to bottom, an adjusting air cylinder is arranged at a top opening of the upper hoisting hollow column, and a piston rod of the adjusting air cylinder is connected with an upper adjusting pull rod. The bottom end of the upper adjusting pull rod is fixedly connected with a lower adjusting pull rod, the middle portions of a plurality of inner supporting pressing rods are hinged to the side wall of the upper lifting hollow column and the side wall of the hollow connecting pipe respectively, the inner ends of the inner supporting pressing rods are hinged to the upper adjusting pull rod and the lower adjusting pull rod respectively, and inner abutting rings are arranged at the outer ends of the inner supporting pressing rods. During hoisting, the connecting state between the inner jacking ring and the inner surface of the roller sleeve is controlled by adjusting the position of the upper adjusting pull rod, and the multiple sets of inclined supporting plates are unfolded to clamp the bottom end face of the roller sleeve, so that the posture of the roller sleeve is stable in the hoisting process, shaking and swinging are avoided, and accurate control over the spatial position is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of hoisting tools for metallurgical roll sleeves, and more specifically to a vertical hoisting tool for large metallurgical roll sleeves. Background Art

[0002] In the metallurgical industry, the length and diameter of large metallurgical roll sleeves are relatively large, resulting in a huge volume and weight. Compared with the horizontal machining process, the vertical machining process is more convenient and faster in clamping operations, and can effectively reduce the deflection deformation of long, large and heavy workpieces due to their own weight, thereby significantly improving the machining accuracy and efficiency. In view of the technological requirements of vertical rough machining and finish machining, it is necessary to perform vertical lifting operations on the roll sleeves; in addition, during the assembly process of large roll sleeves, high-precision vertical hoisting also needs to be achieved. However, currently in the industry, horizontal hoisting tools and methods are generally used for related operations. During the hoisting and assembly processes, the sling needs to be frequently disassembled and assembled and the position and pose of the roll sleeve need to be adjusted (adjusting the horizontal axis to a vertical state), which not only leads to low hoisting and lifting efficiency, but also the roll sleeve is prone to large swings and vibrations during hoisting, making it difficult to ensure the safety and position accuracy during the hoisting process. Summary of the Invention

[0003] In view of this, the present invention provides a vertical hoisting tool for large metallurgical roll sleeves, which can achieve the vertical hoisting and high-precision hoisting of large metallurgical roll sleeves to solve the deficiencies existing in the prior art.

[0004] To achieve the above object, the vertical hoisting tool for large metallurgical roll sleeves provided by the present invention includes an upper hoisting hollow column, a hollow connecting pipe, and a bottom hollow support frame connected in sequence from top to bottom. A cylinder fixing plate is provided at the top opening of the upper hoisting hollow column, and an adjusting cylinder is installed on the cylinder fixing plate. The piston rod of the adjusting cylinder is connected to an upper adjusting pull rod arranged along the axis direction of the upper hoisting hollow column. The bottom end of the upper adjusting pull rod is fixedly connected to a lower adjusting pull rod through a connecting pull rod. The upper adjusting pull rod is located at the axis of the upper hoisting hollow column, and the lower adjusting pull rod is located at the axis of the hollow connecting pipe; A number of inner support pressure rods are annularly arranged on the side walls of the upper hoisting hollow column and the hollow connecting pipe. The middle parts of the number of inner support pressure rods are respectively hinged to the side walls of the upper hoisting hollow column and the hollow connecting pipe. The inner ends of the number of inner support pressure rods extend into the interiors of the upper hoisting hollow column and the hollow connecting pipe and are respectively hinged to the upper adjusting pull rod and the lower adjusting pull rod. Inner tightening rings are provided on the outer ends of the number of inner support pressure rods. During hoisting, the connection state between the inner tightening ring and the inner surface of the roll sleeve is controlled by adjusting the position of the upper adjusting pull rod; A plurality of groups of inclined support plates are evenly distributed circumferentially on the bottom hollow support frame. During hoisting, the plurality of groups of inclined support plates are unfolded from the bottom hollow support frame to clamp the bottom end face of the roller sleeve.

[0005] Preferably, a plurality of inclined first square holes are provided circumferentially on the side wall of the bottom hollow support frame, and the inclined support plates are detachably mounted on the bottom hollow support frame through the first square holes.

[0006] Preferably, a sliding groove perpendicular to and communicating with the first square hole is provided at the bottom of the bottom hollow support frame, and a control slider is elastically connected in the sliding groove through a return spring.

[0007] Preferably, a second square hole corresponding to the first square hole is provided on the control slider. During the compression of the return spring, the first square hole and the second square hole are in a communicating or misaligned state.

[0008] Preferably, one end of the inclined support plate located in the first square hole is provided with a first inclined surface, and a second inclined surface corresponding to the first inclined surface is provided on the sliding groove.

[0009] Preferably, one end of the control slider away from the return spring is elastically connected to the bottom surface of the bottom hollow support frame through a buffer ring.

[0010] Preferably, the part of the inner support pressure rod outside the upper hoisting hollow column and the hollow connecting pipe is elastically connected to the outer side walls of the upper hoisting hollow column and the hollow connecting pipe respectively through spiral tension springs.

[0011] Preferably, the inner tightening ring is hinged to the outer end of the inner support pressure rod through a first fixing pin, and the inner support pressure rod is hinged to the side walls of the upper hoisting hollow column and the hollow connecting pipe respectively through a second fixing pin.

[0012] Preferably, an air inlet connecting pipe and an air exhaust connecting pipe are connected to the adjusting cylinder, and both the air inlet connecting pipe and the air exhaust connecting pipe are connected to the cylinder control solenoid valve on the bottom hollow support frame.

[0013] Preferably, hoisting load-bearing rods and connecting rods are arranged crosswise at the top end of the upper hoisting hollow column.

[0014] As can be seen from the above technical solutions, compared with the prior art, the large metallurgical roll sleeve vertical lifting tool provided by the present invention is controlled by an adjusting cylinder. The axial position of the output piston rod of the adjusting cylinder is controlled by a solenoid valve located outside the bottom hollow support frame, and the position of the inner support pressure rod is adjusted, so as to realize the connection state between the inner tightening ring and the inner hole surface of the roll sleeve. It can be freely switched between the lifting working state (tightening) and the disassembling state (loosening). The control method is simple and convenient. At the same time, multiple groups of inclined support plates clamp the bottom end face of the roll sleeve to form stable supporting points to bear the vertical load of the roll sleeve. In addition, the present invention also has the following advantages: 1. When the control slider touches the bottom placement plane of the roll sleeve at the bottom, it moves obliquely upward along the chute at the bottom of the bottom hollow support frame. When the second square hole on the control slider is aligned with the end face of the inclined support plate, the inclined support plate slides inward through the second square hole on the control slider along the first square hole on the outer wall of the bottom hollow support frame. Under the buffering action of the buffer ring, the lower surface of the roll sleeve can smoothly fall on the unloading plane, avoiding large impact and vibration on the unloading plane of the roll sleeve, making the position and pose of the roll sleeve stable during the lifting process, avoiding shaking and swinging, and realizing accurate control of the spatial position; 2. The lifting tool can be adjusted according to the inner hole diameter and axial length dimensions of the roll sleeve, and is applicable to metallurgical roll sleeves of different specifications. The inner support pressure rods and the tightening rings are distributed and act on different positions of the inner hole surface of the roll sleeve. Under the action of the self-weight of the roll sleeve, the inner support pressure rods produce elastic deformation, and the inner tightening ring will further press the inner surface of the roll sleeve, greatly increasing the friction force; 3. The roll sleeve is convenient for lifting, transporting, installing and disassembling, avoiding frequent disassembly and assembly of the sling, and greatly improving the work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings.

[0016] Figure 1 It is the overall structure diagram of the large metallurgical roll sleeve vertical lifting tool of the present invention; Figure 2 It is the Figure 1 sectional view taken along A-A of the present invention; Figure 3 It is the Figure 1 sectional view taken along B-B of the present invention; Figure 4 It is the Figure 1 sectional view taken along C-C of the present invention; Figure 5 It is the Figure 1Cross-sectional view of D-D in [Chinese]; Figure 6 For the present invention Figure 1 Enlarged view of part Ⅰ in [Chinese]; Figure 7 For the present invention Figure 1 Enlarged view of part Ⅱ in [Chinese]; Figure 8 Structural diagram of the bottom hollow support frame of the present invention, where a is the front cross-sectional view, b is the top view, and c is the bottom view; Figure 9 Structural diagram of the control slider of the present invention, where a is the front cross-sectional view and b is the top perspective view; Figure 10 Structural diagram of the inclined support plate of the present invention, where a is the front view, b is the top view, and c is the right view.

[0017] Explanation of reference numerals: 1 - control slider; 2 - buffer ring; 3 - bottom hollow support frame; 4 - inclined support plate; 5 - return spring; 6 - inner tightening ring; 7 - first fixing pin; 8 - inner support pressure rod; 9 - second fixing pin; 10 - spiral tension spring; 11 - hollow connecting pipe; 12 - upper lifting hollow column; 13 - upper adjusting pull rod; 14 - lifting load-bearing rod; 15 - connecting rod; 16 - cylinder fixing plate; 17 - two-way position adjusting cylinder; 18 - fastening connecting bolt; 19 - air inlet connecting pipe; 20 - exhaust connecting pipe; 21 - connecting pull rod; 22 - lower adjusting pull rod; 23 - cylinder control solenoid valve. Detailed implementation manners

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. The description of an exemplary embodiment below is actually only illustrative and in no way limits the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0019] Please refer to the attached Figures 1 - 10, is a large-scale metallurgical roller sleeve vertical lifting tool disclosed in the present invention, which is composed of three parts connected in sequence: an upper lifting hollow column 12, a hollow connecting pipe 11 and a bottom support frame 3. The bottom hollow support frame 3 is an integral structure, and a detachable connection of the lifting tool is realized with the upper lifting hollow column 12 through a threaded hollow connecting pipe 11, thereby ensuring the stability of the overall structure and the convenience of disassembly and assembly. A cross-shaped lifting load-bearing rod 14 and a connecting rod 15 are arranged at the top of the upper lifting hollow column 12, wherein the lifting load-bearing rod 14 passes through the top of the upper lifting hollow column 12, and a circular hole is preset on the rod body for installing the connecting rod 15. This orthogonal support structure can effectively disperse the load during the lifting process, and evenly distribute the concentrated stress to the entire lifting tool through the principle of mechanical conduction, thereby significantly improving the lateral stability during the lifting operation, avoiding the problem of roller sleeve tilting or shaking caused by uneven force, and making the lifting process more stable.

[0020] A cylinder fixing plate 16 is fixedly installed at the top of the upper lifting hollow column 12, and the adjusting cylinder 17 carried thereon is connected to the upper adjusting rod 13 arranged along the axial direction of the upper lifting hollow column 12 through a piston rod. The bottom end of the upper adjusting rod 13 is rigidly fixed to the lower adjusting rod 22 located at the axis of the hollow connecting pipe 11 through a connecting rod 21, forming an axial transmission mechanism running through the upper and lower parts. The adjusting cylinder 17 is connected to the cylinder control solenoid valve 23 on the bottom support frame 3 through an air intake connecting pipe 19 and an exhaust connecting pipe 20, forming an air circuit control system. When the cylinder control solenoid valve 23 receives the control signal, it can accurately adjust the axial displacement of the piston rod of the adjusting cylinder 17, thereby driving the upper and lower adjusting rods to move synchronously.

[0021] A plurality of groups of inner support struts 8 are evenly distributed circumferentially on the side walls of the upper lifting hollow column 12 and the hollow connecting pipe 11. The middle parts of the inner support struts 8 are respectively hinged to the side walls of the upper lifting hollow column 12 and the hollow connecting pipe 11 through the second fixing pins 9 to form rotatable support nodes. The inner ends of the inner support struts 8 extend into the interiors of the upper lifting hollow column 12 and the hollow connecting pipe 11 and are hinged to the corresponding upper adjusting tie rods 13 or lower adjusting tie rods 22. The outer ends are hinged with an inner tightening ring 6 through the first fixing pins 7. When the adjusting cylinder pushes the tie rod to move axially, the inner support strut 8 rotates around the hinge point, driving the inner tightening ring 6 to perform a radial telescopic movement. Through the precise control of the cylinder on the solenoid valve 23, the connection state between the inner tightening ring 6 and the inner hole surface of the roll sleeve can be realized, and it can be freely switched between the hoisting working state (tightening) and the disassembling state (loosening). In the hoisting working state, the inner tightening ring 6 is closely attached to the inner hole surface of the roll sleeve (tightening state) to provide a stable radial supporting force; in the disassembling state, the inner tightening ring 6 retracts and disengages from the inner wall of the roll sleeve (loosening state). This automatic adjustment mechanism eliminates the need for manual frequent disassembly and assembly of the sling, significantly improving the operation efficiency. At the same time, by adjusting the radial telescopic amount of the tightening ring, it can be adapted to metallurgical roll sleeves of different inner diameter specifications, effectively expanding the applicable range of the tool.

[0022] In this embodiment, three groups of movable inclined support plates 4 are evenly distributed circumferentially on the bottom hollow support frame 3. Each group of inclined support plates 4 is detachably installed through the inclined first square holes on the bottom side walls. One end of the inclined support plate 4 located in the first square hole is provided with a first inclined surface, which forms a matching structure with the second inclined surface on the control slider 1 in the sliding groove. A return spring 5 and a control slider 1 are installed in the sliding groove. One end of the slider is elastically connected to the bottom surface of the bottom hollow support frame 3 through a (polyurethane) buffer ring 2.

[0023] During the hoisting operation, the three groups of inclined support plates 4 at the bottom unfold, and their ends reliably catch the bottom end face of the roll sleeve, forming stable supporting fulcrums to play a supporting role and bear the vertical load of the roll sleeve. When the hoisting is completed and the hoisting tool is placed on the ground, the buffer ring 2 is compressed by the ground pressure, causing the control slider 1 to move upward along the sliding groove, so that the first square hole and the second square hole on the control slider 1 change from the misaligned state to the communicating state. When the restriction given by the control slider 1 to the inclined support plate 4 disappears, the inclined support plate 4 automatically retracts under its own gravity and the inclined surface matching relationship, and the circumferential dimensions of the multiple groups of inclined support plates 4 decrease, facilitating the smooth removal of the hoisting tool from the inside of the roll sleeve. This self-resetting mechanism design realizes the automatic switching between the supporting and disassembling states, avoiding manual intervention and improving the operation safety and convenience.

[0024] The foregoing description of the disclosed embodiments enables those skilled in the art to practice or use the present invention. Various modifications to these embodiments will be readily apparent to those 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. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A vertical lifting tool for large metallurgical roll sleeves, characterized in that, It includes a top lifting hollow column (12), a hollow connecting pipe (11), and a bottom hollow support frame (3) connected in sequence from top to bottom. At the top opening of the top lifting hollow column (12), there is a cylinder fixing plate (16). An adjusting cylinder (17) is installed on the cylinder fixing plate (16). The piston rod of the adjusting cylinder (17) is connected to an upper adjusting pull rod (13) arranged along the axis direction of the top lifting hollow column (12). The bottom end of the upper adjusting pull rod (13) is fixedly connected to a lower adjusting pull rod (22) through a connecting pull rod (21). The upper adjusting pull rod (13) is located at the axis of the top lifting hollow column (12), and the lower adjusting pull rod (22) is located at the axis of the hollow connecting pipe (11). A number of inner support pressure rods (8) are annularly arranged on the side walls of the top lifting hollow column (12) and the hollow connecting pipe (11). The middle parts of the number of inner support pressure rods (8) are respectively hinged to the side walls of the top lifting hollow column (12) and the hollow connecting pipe (11). The inner ends of the number of inner support pressure rods (8) extend into the interiors of the top lifting hollow column (12) and the hollow connecting pipe (11) and are respectively hinged to the upper adjusting pull rod (13) and the lower adjusting pull rod (22). Inner tightening rings (6) are provided at the outer ends of the number of inner support pressure rods (8). During lifting, by adjusting the position of the upper adjusting pull rod (13), the connection state between the inner tightening ring (6) and the inner surface of the roller sleeve is controlled. A plurality of groups of inclined support plates (4) are circumferentially and uniformly distributed on the bottom hollow support frame (3). During lifting, the plurality of groups of inclined support plates (4) are unfolded from the bottom hollow support frame (3) to clamp the bottom end face of the roller sleeve.

2. The vertical lifting tool for large metallurgical roll sleeves according to claim 1, characterized in that, A plurality of inclined first square holes are circumferentially arranged on the side wall of the bottom hollow support frame (3). The inclined support plates (4) are detachably installed on the bottom hollow support frame (3) through the first square holes.

3. The vertical lifting tool for large metallurgical roll sleeves according to claim 2, characterized in that, A sliding groove perpendicular to and communicating with the first square hole is provided at the bottom of the bottom hollow support frame (3). A control slider (1) is elastically connected in the sliding groove through a return spring (5).

4. The large metallurgical roll sleeve vertical lifting tool according to claim 3, characterized in that, A second square hole corresponding to the first square hole is provided on the control slider (1). During the compression process of the return spring (5), the first square hole and the second square hole are in a communicating or misaligned state.

5. The vertical lifting tool for large metallurgical roll sleeves according to claim 4, wherein One end of the inclined support plate (4) located in the first square hole is provided with a first inclined surface, and a second inclined surface corresponding to the first inclined surface is provided on the sliding groove.

6. The vertical lifting tool for large metallurgical roll sleeves according to claim 3, characterized in that, One end of the control slider (1) far from the return spring (5) is elastically connected to the bottom surface of the bottom hollow support frame (3) through a buffer ring (2).

7. The vertical lifting tool for large metallurgical roller sleeves according to claim 1, characterized in that, The parts of the inner support pressure rods (8) outside the top lifting hollow column (12) and the hollow connecting pipe (11) are elastically connected to the outer side walls of the top lifting hollow column (12) and the hollow connecting pipe (11) respectively through spiral tension springs (10).

8. The vertical lifting tool for large metallurgical roll sleeves according to claim 1, characterized in that The inner tightening ring (6) is hinged to the outer end of the inner support pressure rod (8) through a first fixing pin (7), and the inner support pressure rod (8) is respectively hinged to the side walls of the top lifting hollow column (12) and the hollow connecting pipe (11) through a second fixing pin (9).

9. The vertical lifting tool for large metallurgical roll sleeves according to claim 1, characterized in that An air inlet connecting pipe (19) and an exhaust connecting pipe (20) are connected to the adjusting air cylinder (17), and both the air inlet connecting pipe (19) and the exhaust connecting pipe (20) are connected to an air cylinder control solenoid valve (23) on the bottom hollow support frame (3).

10. The vertical lifting tool for large metallurgical roller sleeves according to claim 1, characterized in that, At the top of the upper lifting hollow column (12), there are a lifting load-bearing rod (14) and a connecting rod (15) which are arranged crosswise with each other.

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