CN216297518U

CN216297518U - A independent hydro-cylinder balancing unit for work roll system is balanced

Info

Publication number: CN216297518U
Application number: CN202122743997.8U
Authority: CN
Inventors: 胡式保; 万多稳; 殷浩; 付永生; 张彩华; 张成益; 刘一莹; 龚义东; 杨蜀池; 张敬东; 郭晓飞; 彭力; 李凌
Original assignee: YUNNAN METALLURGICAL KUNMING HEAVY INDUSTRY CO LTD
Current assignee: YUNNAN METALLURGICAL KUNMING HEAVY INDUSTRY CO LTD
Priority date: 2021-11-10
Filing date: 2021-11-10
Publication date: 2022-04-15
Anticipated expiration: 2031-11-10

Abstract

The utility model discloses a separate oil cylinder balancing device for balancing a working roll system, wherein an upper roll bearing block is provided with a blind hole I, one side of the upper roll bearing block is provided with a abdication hole, and a lower roll bearing block is provided with a blind hole II coaxial with the blind hole I; the cylinder liner is in tube-shape and interference fit locate blind hole I and the open end stretches into blind hole II, is equipped with the screw hole on the cylinder liner lateral wall, and the piston rod is "T" shape structure and vertical portion stretch into in the cylinder liner and horizontal portion bottom can with II butts of blind hole, vertical portion lower part cover be equipped with cylinder liner clearance fit's uide bushing, vertical portion upper portion be fixed with cylinder liner clearance fit's gland, vertical portion overlap between uide bushing and gland be equipped with the sealed complex sealing ring of cylinder liner. According to the utility model, the cylinder sleeve and the internal structure are arranged between the upper bearing seat and the lower bearing seat, the rolling pressure can be adjusted by introducing oil and giving a balancing force, the cylinder sleeve can move up and down to balance the working roll system, and the control of the opening degree of the roll is realized.

Description

A independent hydro-cylinder balancing unit for work roll system is balanced

Technical Field

The utility model belongs to the technical field of metal rolling equipment, and particularly relates to a single-body oil cylinder balancing device for balancing a working roll system, which has the advantages of simple structure, easiness in processing and assembling, large stroke range, easiness in maintenance and reliability in working.

Background

In the existing steel rolling technology, a hydraulic balance working roll system is adopted, a balance oil cylinder hole is usually formed by directly processing an upper roll bearing seat, the first problem faced by the method is that the oil cylinder hole with high precision is difficult to process, the second problem is that the assembly and disassembly of parts such as a piston are troublesome, the third problem is that the stroke range is small, and the fourth problem is that the maintenance is inconvenient. Especially for a rolling mill with a smaller structure, due to the space limitation of two ends of a working roll, an independent balance oil cylinder cannot be directly processed and formed in an upper roll bearing block, or although the balance oil cylinder can be processed and formed, the balance adjusting function cannot be met due to the small stroke.

In order to solve the problems, in the prior art, a balance hydraulic cylinder is generally arranged at the top of a mill housing, and then an upper roll bearing seat is hung above a lower roll bearing seat through a connecting mechanism, so that a balance adjusting function is realized. However, such a structure is only suitable for the uppermost roller of a rolling mill with a stacked multi-roller structure, and if the lower roller also adopts a similar structure, the structure of the rolling mill housing is complicated, the structural strength of the rolling mill housing is difficult to ensure, the assembly and disassembly are difficult, and the application is difficult in reality. Therefore, in the prior art, corresponding spherical holes are respectively arranged on bearing blocks of an upper roller and a lower roller, an oil cylinder is arranged between the bearing blocks of the upper roller and the lower roller, spherical caps are respectively arranged at the end parts of the oil cylinder and a piston rod, then the spherical caps of the oil cylinder and the piston rod are assembled in the spherical holes of the bearing blocks, and finally the oil cylinder is communicated with a hydraulic system through an oil inlet on the oil cylinder to adjust rolling pressure, so that the opening degree of the roller is controlled; although the technical scheme can solve the problems of difficult processing, disassembly and assembly and inconvenient maintenance, the oil cylinder has shorter stroke and limited balance adjustment capacity because the space between the upper and lower roll bearing blocks is limited, and particularly the rolling mill with a smaller structure is particularly prominent; the oil cylinder and the spherical caps of the piston rod are assembled in the spherical holes of the bearing block and are not fixed, so that the roller is easy to slip when being hoisted, potential safety hazards exist, the spherical caps at two ends are difficult to be correctly led into the spherical holes due to an unfixed connection mode, the spherical caps are easy to collide and damage, contact is not tight after assembly, and the accuracy of balance adjustment is influenced; in addition, because the pipeline that the oil inlet was connected on the hydro-cylinder need be drawn forth from the space of upper and lower roll chock, not only the dismouting of pipeline is comparatively difficult, also has the abnormal wear between pipeline and rotatory roll or the chock that reciprocates moreover to the maintenance work volume has been increased.

Therefore, it is the key to solve the above problems to research and develop a single-body cylinder balancing device with simple structure, easy processing and assembly, large stroke range, low maintenance cost and reliable operation.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide the independent oil cylinder balancing device for balancing the working roller system, which has the advantages of simple structure, easy processing and assembly, large stroke range, easy maintenance and reliable work.

The purpose of the utility model is realized as follows: the blind hole I is vertically arranged at the lower part of the upper roll chock, the abdicating hole communicated with the blind hole I is also arranged on the end face of the outer side of the upper roll chock, and the blind hole II coaxial with the blind hole I is vertically arranged at the upper part of the lower roll chock; the cylinder liner is tubular structure and one end interference fit set up in blind hole I and the open end extends into blind hole II in, be provided with on the cylinder liner lateral wall with let the position of hole correspond and with the screw hole that hydraulic system is connected, the piston rod is "T" shape structure and vertical portion stretch into in the cylinder liner and the bottom of the horizontal portion of bottom can with the bottom butt of blind hole II, the piston rod is equipped with bottom and horizontal portion top laminating and excircle and cylinder liner inner wall clearance fit's uide bushing in the lower part cover of vertical portion, the fixed cover of vertical portion upper portion detachable of piston rod is equipped with the gland with cylinder liner inner wall clearance fit, the vertical portion of piston rod compresses tightly the cover between the terminal surface of uide bushing and gland and is equipped with the sealing ring with the sealed complex of cylinder liner inner wall.

The utility model has the beneficial effects that:

1. according to the utility model, the balance oil cylinder is separated into independent units, so that the structure is simplified, only low-precision blind holes are required to be processed in the upper and lower roll bearing blocks, the processing precision of the independent oil cylinder is easy to guarantee, and the processability and the assembly of each part are improved; in addition, the piston rod and the accessories on the piston rod are detachably connected between the cylinder sleeve and the blind hole and in the cylinder sleeve, so that the assembly, the disassembly and the maintenance are easy; in addition, the cylinder sleeve is arranged in the blind holes of the upper and lower roll bearing blocks, so that the loading space of the cylinder sleeve can be prolonged, the adjusting stroke range is effectively increased, and the rolling mill is particularly suitable for rolling mills with smaller structures.

2. The cylinder sleeve is arranged in the blind hole I of the upper roller bearing seat in an interference fit manner to form a fixed structure, and the sealing ring on the piston rod is in tight fit with the inner wall of the cylinder sleeve, so that the potential safety hazard of easy slipping during roller hoisting can be eliminated, the open end of the cylinder sleeve is conveniently led into the blind hole II during installation, the influence of collision between the cylinder sleeve and the blind hole II on the smoothness of up-and-down movement after assembly and the tightness of bottom butt joint can be avoided, and the reliability and the precision of adjustment can be improved.

3. The utility model sets the abdicating hole communicated with the blind hole I on the outer side end face of the upper roll chock, thereby facilitating the connection of the oil supply pipeline of the hydraulic system and the threaded hole on the side wall of the cylinder sleeve to form reliable oil supply, facilitating the disassembly and the adjustment of the pipeline, and because the cylinder sleeve and the blind hole I of the upper roll chock are in interference fit to form fixed connection, the oil supply pipeline of the hydraulic system is also in static fixed connection with the cylinder sleeve, thereby avoiding the abnormal abrasion of the pipeline and the roller or the lower roll chock moving up and down, effectively increasing the working reliability of the oil supply pipeline, and reducing the maintenance workload of the pipeline.

Therefore, the utility model has the characteristics of simple structure, easy processing and assembly, large stroke range, easy maintenance and reliable work.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1;

FIG. 3 is a left side view of FIG. 1;

in the figure: 1-upper roll chock, 1A-blind hole I, 1B-abdicating hole, 1C-through hole I, 2-lower roll chock, 2A-blind hole II, 2B-through hole II, 3-cylinder sleeve, 3A-threaded hole, 3B-stepped hole I, 3C-stepped hole II, 3D-platform surface, 4-screw, 5-spring washer, 6-gland, 6A-exhaust hole, 7-sealing ring, 7A-V type compression ring, 7B-V type sealing ring, 7C-V type supporting ring, 8-guide sleeve, 9-piston rod, 9A-vertical part, 9B-transverse part, L-opening degree.

Detailed Description

The present invention is further described with reference to the following examples and accompanying drawings, but the present invention is not limited thereto in any way, and any modification or replacement made in accordance with the teachings of the present invention falls within the scope of the present invention.

As shown in fig. 1, 2 and 3, the utility model comprises an upper roll chock 1, a lower roll chock 2, a cylinder sleeve 3, a gland 6, a sealing ring 7, a guide sleeve 8 and a piston rod 9, wherein the lower part of the upper roll chock 1 is vertically provided with a blind hole i 1A, the end surface of the outer side of the upper roll chock 1 is also provided with a abdicating hole 1B communicated with the blind hole i 1A, and the upper part of the lower roll chock 2 is vertically provided with a blind hole ii 2A coaxial with the blind hole i 1A; the utility model discloses a hydraulic cylinder, including cylinder liner 3, piston rod 9, cylinder liner 3, one end interference fit's setting in blind hole I1A and the open end extend into blind hole II 2A, be provided with on the 3 lateral walls of cylinder liner and step down the screw hole 3A that hole 1B position corresponds and be connected with hydraulic system with stepping down, piston rod 9 is "T" shape structure and vertical portion 9A stretches into in the cylinder liner 3 and the bottom of the horizontal portion 9B of bottom can with blind hole II 2A's bottom butt, piston rod 9 overlaps in the lower part of vertical portion 9A and is equipped with bottom and the laminating of horizontal portion top and excircle and 3 inner wall clearance fit's of cylinder liner uide bushing 8, the fixed cover in vertical portion 9A upper portion of piston rod 9 is equipped with 3 inner wall clearance fit's of cylinder liner gland 6, the vertical portion 9A of piston rod 9 compresses tightly the cover between the terminal surface of uide bushing 8 and gland 6 and is equipped with 3 inner wall seal ring 7 of cylinder liner seal fit.

The inside of cylinder liner 3 is that second grade step hole and the I3B diameter of step hole of bottom are less than the II 3C of step hole at top, screw hole 3A sets up perpendicularly in the lateral wall of step hole I3B, gland 6 and uide bushing 8 respectively with II 3C clearance fit in step hole, sealing ring 7 and II 3C sealing fit in step hole.

As shown in fig. 2, the sealing ring 7 includes a V-shaped compression ring 7A, V type sealing ring 7B and a V-shaped supporting ring 7C which are overlapped in sequence, the V-shaped compression ring 7A is of an annular structure and is provided with a V-shaped annular boss at the bottom, the V-shaped sealing ring 7B is of a V-shaped annular structure, the V-shaped supporting ring 7C is of an annular structure and is provided with a V-shaped annular groove at the top, and at least two V-shaped sealing rings 7B are arranged in the sealing ring 7.

The V-shaped compression ring 7A and/or the V-shaped supporting ring 7C are rigid rings or elastic rubber rings.

V type clamping ring 7A and V type supporting ring 7C are the elastic rubber ring, V type clamping ring 7A's top is provided with annular groove, the bottom of V type sealing ring 7B and/or V type supporting ring 7C's "V" annular groove also is provided with annular groove, the top of gland 6 is provided with the exhaust hole 6A in intercommunication V type clamping ring 7A's annular groove and the 3 inner wall spaces of cylinder liner.

The piston rod 9 is provided with the screw on the top of vertical portion 9A, gland 6 is through passing screw 4 and piston rod 9 fixed connection in vertical portion 9A of screw, the screwhead external diameter of screw 4 is less than I3B diameter of stepped hole.

The transverse part 9B of the piston rod 9 is in a cylindrical or polygonal structure, and the top end of the transverse part 9B is a plane or an arc surface.

The transverse portion 9B of the piston rod 9 is of a square configuration.

The outer wall of the cylinder sleeve 3 is cut with a platform surface 3D perpendicular to a threaded hole 3A, and the threaded hole 3A is a fine thread threaded hole or a pipe threaded hole.

The bottom of blind hole I1A is provided with through-hole I1C of dismantling cylinder liner 3 perpendicularly, still be provided with through-hole II 2B of intercommunication blind hole II 2A on the outside terminal surface of lower roll chock 2.

As shown in FIG. 3, the blind holes I1A are symmetrically arranged on the upper roll chock 1 at two sides of the axial line of the upper roll, and the blind holes II 2A and the blind holes I1A are coaxially and correspondingly symmetrically arranged on the lower roll chock 2 at two sides of the axial line of the lower roll.

The working principle and the working process of the utility model are as follows:

as shown in fig. 1, 2 and 3, during processing and assembly, blind holes with low precision are respectively processed at corresponding positions of an upper roll chock 1 and a lower roll chock 2, and a abdicating hole 1B communicated with the blind hole i 1A is processed at the outer side end face of the upper roll chock 1 (if necessary, a through hole i 1C vertically communicated with the bottom end of the blind hole i 1A can be processed on the upper roll chock 1 to facilitate the dismounting of the cylinder sleeve 3, and meanwhile, a through hole ii 2B communicated with the blind hole ii 2A can be processed on the outer side end face of the lower roll chock 2 to facilitate the adjustment and dismounting of the piston rod 9); then each part is cleaned, the cylinder sleeve 3 is jacked in a blind hole I1A of an upper roll chock 1 in an interference fit manner, a threaded hole 3A in the cylinder sleeve 3 is aligned with a yielding hole 1B in the upper roll chock 1 and is connected with a pipeline of a hydraulic system, then a guide sleeve 8, a V-shaped supporting ring 7C, V type sealing ring 7B, V type pressing ring 7A are sequentially sleeved on a vertical part 9A of a piston rod 9, then the pressing ring 7A is pressed on the V-shaped pressing ring 7A by a pressing cover 6, the pressing cover 6 is pressed by a screw 4, then the piston rod 9 and accessories on the piston rod are pressed into a step hole II 3C of the cylinder sleeve 3, a closed working cavity of pressure oil is formed between a closed end of the cylinder sleeve 1 and the V-shaped sealing ring 7B, finally the upper roll chock 1 is lifted, the bottom end of the piston rod 9 in the cylinder sleeve 3 is abutted to the bottom end of a blind hole II 2A of a lower roll chock 2, or the open end of the cylinder sleeve 3 is extended into a blind hole II 2A, and the piston rod 9 is suspended in the blind hole II 2A And the installation of the utility model is completed. The dismounting process is vice versa.

When the rolling mill is used, an oil supply pipeline of a hydraulic system on the threaded hole 3A is communicated, a balance force is given, and rolling pressure is adjusted at the same time, so that the piston rod 9 is guided by the guide sleeve 8, and the pressure action of pressure oil generates an acting force and a reacting force, the piston rod 9 can move up and down to balance a working roll system, the opening degree L of the roll is realized, the roll gap is adjusted, and the rolling mill is ensured to enter a normal working state.

Claims

1. A separate oil cylinder balancing device for balancing a working roll system is characterized by comprising an upper roll bearing block (1), a lower roll bearing block (2), a cylinder sleeve (3), a gland (6), a sealing ring (7), a guide sleeve (8) and a piston rod (9), wherein a blind hole I (1A) is vertically arranged at the lower part of the upper roll bearing block (1), an abdicating hole (1B) communicated with the blind hole I (1A) is also arranged at the end face of the outer side of the upper roll bearing block (1), and a blind hole II (2A) coaxial with the blind hole I (1A) is vertically arranged at the upper part of the lower roll bearing block (2); cylinder liner (3) are tubular structure and one end interference fit set up in blind hole I (1A) and the open end extends into blind hole II (2A), be provided with on cylinder liner (3) the lateral wall and correspond and with screw hole (3A) that hydraulic system is connected with hole (1B) position of stepping down, piston rod (9) stretch into cylinder liner (3) in and the bottom butt of the horizontal portion (9B) of bottom can with blind hole II (2A) for "T" shape structure and vertical portion (9A), piston rod (9) overlap in the lower part of vertical portion (9A) and be equipped with bottom and the laminating of horizontal portion top and excircle and cylinder liner (3) inner wall clearance fit's uide bushing (8), the fixed cover of vertical portion (9A) upper portion detachable of piston rod (9) is equipped with gland (6) with cylinder liner (3) inner wall clearance fit, the vertical portion (9A) of piston rod (9) compresses tightly the cover and is equipped with between the terminal surface of uide bushing (8) and gland (6) and compress tightly the cover and be equipped with And the sealing ring (7) is in sealing fit with the inner wall of the cylinder sleeve (3).

2. The single-body oil cylinder balancing device for balancing the working roller system according to claim 1, wherein a secondary step hole is formed in the cylinder sleeve (3), the diameter of the step hole I (3B) at the bottom of the cylinder sleeve is smaller than that of the step hole II (3C) at the top of the cylinder sleeve, the threaded hole (3A) is vertically formed in the side wall of the step hole I (3B), the gland (6) and the guide sleeve (8) are in clearance fit with the step hole II (3C) respectively, and the sealing ring (7) is in sealing fit with the step hole II (3C).

3. The single-body oil cylinder balancing device for the balance of the work roll system according to claim 2, wherein the sealing ring (7) comprises a V-shaped pressing ring (7A), a V-shaped sealing ring (7B) and a V-shaped supporting ring (7C) which are sequentially overlapped, the V-shaped pressing ring (7A) is of an annular structure, a V-shaped annular boss is arranged at the bottom of the V-shaped pressing ring, the V-shaped sealing ring (7B) is of a V-shaped annular structure, the V-shaped supporting ring (7C) is of an annular structure, a V-shaped annular groove is arranged at the top of the V-shaped supporting ring, and at least two V-shaped sealing rings (7B) are arranged in the sealing ring (7).

4. The individual cylinder balancing device for work roll system balancing according to claim 3, characterized in that the V-shaped compression ring (7A) and/or the V-shaped support ring (7C) is a rigid ring or an elastic rubber ring.

5. The independent oil cylinder balancing device for the balance of the working roll system according to claim 4, wherein the V-shaped compression ring (7A) and the V-shaped support ring (7C) are elastic rubber rings, an annular groove is formed in the top end of the V-shaped compression ring (7A), an annular groove is also formed in the bottom of the V-shaped annular groove of the V-shaped sealing ring (7B) and/or the V-shaped support ring (7C), and an exhaust hole (6A) for communicating the annular groove of the V-shaped compression ring (7A) with the inner wall space of the cylinder sleeve (3) is formed in the top end of the gland (6).

6. The independent oil cylinder balancing device for the balance of the working roll system according to claim 2, wherein the piston rod (9) is provided with a screw hole at the top end of the vertical part (9A), the gland (6) is fixedly connected with the piston rod (9) at the vertical part (9A) through a screw (4) penetrating through the screw hole, and the outer diameter of the screw head of the screw (4) is smaller than the diameter of the stepped hole I (3B).

7. The single-body cylinder balancing device for work roll system balancing according to claim 2, characterized in that the transverse portion (9B) of the piston rod (9) has a cylindrical or polygonal structure, and the top end of the transverse portion (9B) is a plane or an arc surface.

8. The individual cylinder balancing device for work roll system balancing according to claim 7, characterized in that the transverse portion (9B) of the piston rod (9) is of a square configuration.

9. The single-body oil cylinder balancing device for the balance of the working roll system according to claim 2, characterized in that a platform surface (3D) perpendicular to a threaded hole (3A) is cut on the outer wall of the cylinder sleeve (3), and the threaded hole (3A) is a fine thread threaded hole or a pipe threaded hole.

10. The single-body oil cylinder balancing device for the balance of the working roll system according to any one of claims 1 to 9, characterized in that a through hole I (1C) for detaching the cylinder sleeve (3) is vertically arranged at the bottom end of the blind hole I (1A), and a through hole II (2B) for communicating the blind hole II (2A) is further arranged on the outer end surface of the lower roll chock (2).

11. The single-body cylinder balancing device for work roll system balancing of claim 10, wherein the blind holes i (1A) are symmetrically disposed on the upper roll chock (1) at both sides of the axis of the upper roll, and the blind holes ii (2A) are symmetrically disposed on the lower roll chock (2) at both sides of the axis of the lower roll coaxially corresponding to the blind holes i (1A).