Working roll bending balancing device for medium and heavy plate mill with channeling roll

Abstract

The invention provides a working roll bending balancing device for a heavy and medium plate mill with a shifting roll, and relates to the technical field of mills, the working roll bending balancing device for the heavy and medium plate mill with the shifting roll comprises a balancing cylinder block and a moving cover; the four balance cylinder blocks are used for being installed on the two operation side stand columns and the two transmission side stand columns correspondingly, and first oil supply oil ways communicating with the lower ends of the first oil cavities and second oil supply oil ways communicating with the lower ends of the second oil cavities are further arranged in the balance cylinder blocks. The first oil supply ways of the two balance cylinder blocks on the two operation side stand columns or the two transmission side stand columns are communicated with each other, and the second oil supply ways of the two balance cylinder blocks are communicated with each other. The movable cover comprises an abutting plate, the lower side face of the abutting plate abuts against the upper end of the first upper cylinder rod and the upper end of the second upper cylinder rod, and the upper side face of the abutting plate is used for abutting against an outwards-extending wing of the upper working roller bearing seat. The risk that the upper cylinder rod is broken due to shearing force can be reduced, and the situation that the bearing is burnt out due to uneven stress is prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of rolling mills, and in particular to a working roll bending balancing device for a medium and thick plate rolling mill with roll shifting. Background Art

[0002] The working roll bending and balancing device is an important component of the medium and thick plate rolling mill. It is mainly used to bend the working rolls during the steel plate rolling process, change the deformation deflection of the working rolls, thereby controlling the roll gap convexity of the rolling mill, and then ensuring the straightness of the rolled plate.

[0003] In the related art, the working roll bending and balancing device usually includes a liftable upper hydraulic cylinder rod, which is connected to the upper working roll system to drive the upper working roll system to move up and down. However, for medium and thick plate rolling mills with roll shifting function, when the upper working roll system moves axially, the upper hydraulic cylinder rod will be tilted, which may easily cause the upper hydraulic cylinder rod to break due to shear force. Summary of the invention

[0004] The problem solved by the invention is: how to reduce the risk of the upper hydraulic cylinder rod being broken by shear force.

[0005] In order to solve the above problems, the present invention provides a working roll bending balancing device for a medium and thick plate rolling mill with roll shifting.

[0006] The present invention provides a working roll bending balancing device for a medium and thick plate rolling mill with shifted rolls, comprising a balancing cylinder block and a movable cover; four balancing cylinder blocks are used to be respectively installed on two operating side columns and two transmission side columns; the upper part of the balancing cylinder block is provided with a first oil chamber and a second oil chamber arranged at intervals along the axial direction of an upper working roll bearing seat; a first upper cylinder rod is slidably installed in the first oil chamber, and a second upper cylinder rod is slidably installed in the second oil chamber; a first oil supply oil passage connected to the lower end of the first oil chamber and a second oil supply oil passage connected to the lower end of the second oil chamber are also provided in the balancing cylinder block; the first oil supply oil passages of the two balancing cylinder blocks on the two operating side columns or the two transmission side columns are connected to each other, and the second oil supply oil passages of the two balancing cylinder blocks are connected to each other; the movable cover comprises an abutment plate, the lower side surface of the abutment plate abuts against the upper end of the first upper cylinder rod and the upper end of the second upper cylinder rod respectively, and the upper side surface of the abutment plate is used to abut against the outwardly extending wing of the upper working roll bearing seat.

[0007] Optionally, the abutment plate includes a body and a first slide plate installed at the lower end of the body, and the first slide plate abuts against the upper end of the first upper cylinder rod and the upper end of the second upper cylinder rod respectively.

[0008] Optionally, the abutment plate further comprises a second slide plate mounted on the upper end of the main body, and the second slide plate is used for abutting against an outwardly extending wing of the upper working roll bearing seat.

[0009] Optionally, the balancing cylinder block has a first side wall, a second side wall and a third side wall, the first side wall is opposite to the peripheral side wall of the upper working roll bearing seat in the radial direction of the upper working roll bearing seat, and the second side wall and the third side wall are relatively arranged along the axial direction of the upper working roll bearing seat; the movable cover also includes a first enclosure plate, a second enclosure plate and a third enclosure plate connected to the abutment plate, the first enclosure plate is slidably connected to the first side wall, the second enclosure plate is slidably connected to the second side wall, and the third enclosure plate is slidably connected to the third side wall.

[0010] Optionally, a first guide slide is installed on the first side wall; a second guide slide is installed on the peripheral side wall of the upper working roll bearing seat; a third slide that slides with the first guide slide is installed on the side of the first enclosure plate close to the first side wall, and a fourth slide that slides with the second guide slide is installed on the side of the first enclosure plate away from the first side wall.

[0011] Optionally, a third guide slide is installed on the second side wall, and a fifth slide slidably matched with the third guide slide is installed on the side of the second enclosure plate close to the second side wall; and / or,

[0012] The third side wall is equipped with a fourth guide slide, and the side surface of the third enclosure plate close to the third side wall is equipped with a sixth slide that slidably cooperates with the fourth guide slide.

[0013] Optionally, the second side wall is provided with a first sliding groove extending up and down, and a first sliding block slidably matched with the first sliding groove is installed on a side surface of the second enclosure plate close to the second side wall; and / or,

[0014] The third side wall is provided with a second sliding groove extending up and down, and a second sliding block slidably matched with the second sliding groove is installed on the side surface of the third enclosure plate close to the third side wall.

[0015] Optionally, a third oil supply circuit is provided in the balancing cylinder block and is respectively connected to the upper end of the first oil chamber and the upper end of the second oil chamber, and the third oil supply circuits of the two balancing cylinder blocks on the two operating side columns or the two transmission side columns are connected to each other.

[0016] Optionally, it also includes a hydraulic system, which includes a first branch oil pipe, a second branch oil pipe and a third branch oil pipe; the first oil supply circuits of the two balancing cylinder blocks on the two operating side columns or the two transmission side columns are connected to the first branch oil pipe, the second oil supply circuits of the two balancing cylinder blocks are connected to the second branch oil pipe, and the third oil supply circuits of the two balancing cylinder blocks are connected to the third branch oil pipe.

[0017] Optionally, the lower part of the balancing cylinder block is provided with a third oil chamber and a fourth oil chamber which are arranged at intervals along the axial direction of the lower working roll bearing seat, the first lower cylinder rod is slidably installed in the third oil chamber, and the second lower cylinder rod is slidably installed in the fourth oil chamber, and the lower end of the first lower cylinder rod and the lower end of the second lower cylinder rod are used to be connected to the lower working roll bearing seat.

[0018] The beneficial effect of the working roll bending and balancing device for a medium and thick plate rolling mill with shifted rolls of the present invention is as follows: since the working roll bending and balancing device includes a movable cover, and the lower side surface of the abutment plate of the movable cover abuts against the upper end of the first upper cylinder rod and the upper end of the second upper cylinder rod respectively, the upper side surface of the abutment plate is used to abut against the outward-extending wing of the upper working roll bearing seat, so that the abutment plate and the upper cylinder rod are in a non-fixed connection relationship, and the abutment plate and the outward-extending wing of the upper working roll bearing seat are also in a non-fixed connection relationship. When the upper working roll bearing seat follows the upper working roll to shift axially, the outward-extending wing of the upper working roll bearing seat can move along the upper side surface of the abutment plate without causing the upper end of the upper cylinder rod to deflect relative to the lower end, thereby reducing the risk of the upper cylinder rod being broken by shear force. In addition, since the balancing cylinder block is provided with a first oil supply oil passage connected to the lower end of the first oil chamber and a second oil supply oil passage connected to the lower end of the second oil chamber, the first oil supply oil passages of the two balancing cylinder blocks on the two operating side columns or the two transmission side columns are connected to each other, and the second oil supply oil passages of the two balancing cylinder blocks are connected to each other, so that the two connected first oil supply oil passages can be used to synchronously pressurize the lower parts of the two first oil chambers to enhance the bending roll force provided upward by the two first upper cylinder rods, and the two connected second oil supply oil passages can be used to synchronously pressurize the lower parts of the two second oil chambers. When the upper working roll bearing seat moves axially and the center of gravity is closer to the two first upper cylinder rods, the lower parts of the two first oil chambers can be pressurized synchronously to increase the bending roll force of the two first upper cylinder rods. When the upper working roll bearing seat moves axially and the center of gravity is closer to the two second upper cylinder rods, the lower parts of the two second oil chambers can be pressurized synchronously to increase the bending roll force of the two second upper cylinder rods, thereby avoiding unbalanced force when the upper working roll bearing seat moves axially, thereby preventing the bearing from burning out due to uneven force. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a medium and thick plate rolling mill with shifted rollers according to an embodiment of the present invention;

[0020] Figure 2 for Figure 1 An enlarged schematic diagram of part a of a medium and thick plate mill with middle belt roll shifting;

[0021] Figure 3 for Figure 1 Cross-sectional view of the medium and thick plate mill with shifted rollers along line AA;

[0022] Figure 4 for Figure 3 An enlarged schematic diagram of part b of a medium and thick plate mill with middle belt roll shifting;

[0023] Figure 5 for Figure 3 Cross-sectional view of the medium and thick plate mill with shifted rollers along line BB;

[0024] Figure 6 This is a schematic diagram of the three-dimensional structure of the mobile cover according to an embodiment of the present invention at a certain viewing angle;

[0025] Figure 7 It is a schematic diagram of the three-dimensional structure of the mobile cover according to the embodiment of the present invention from another viewing angle;

[0026] Figure 8 It is a schematic diagram of the three-dimensional structure of the balancing cylinder block in one viewing angle according to an embodiment of the present invention;

[0027] Fig. 9 This is a schematic diagram of installing the movable cover on the balancing cylinder block according to an embodiment of the present invention;

[0028] Fig.10 It is a schematic diagram of the three-dimensional structure of the balancing cylinder block according to an embodiment of the present invention from another perspective.

[0029] Description of reference numerals:

[0030] 1. Balance cylinder block; 11. First oil chamber; 111. First upper cylinder rod; 12. Second oil chamber; 121. Second upper cylinder rod; 13. First side wall; 131. First guide plate; 14. Second side wall; 141. Third guide plate; 142. First slide groove; 15. Third side wall; 151. Fourth guide plate; 152. Second slide groove; 16. Third oil chamber; 17. Fourth oil chamber; 18. First lower cylinder rod; 19. Second lower cylinder rod; 2. Moving cover; 21. Abutment plate; 2 11. Main body; 212. First slide; 213. Second slide; 22. First enclosure; 221. Third slide; 222. Fourth slide; 23. Second enclosure; 231. Fifth slide; 232. First slider; 24. Third enclosure; 241. Sixth slide; 242. Second slider; 3. Operating side column; 4. Transmission side column; 5. Upper working roll bearing seat; 51. Outwardly extending wing; 52. Peripheral side wall; 521. Second guide slide; 6. Lower working roll bearing seat. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. Although certain embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be interpreted as being limited to the embodiments described herein. On the contrary, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the drawings and embodiments of the present invention are only for exemplary purposes and are not intended to limit the scope of protection of the present invention.

[0032] The Z axis in the drawings represents the vertical direction, that is, the up and down position, and the positive direction of the Z axis represents the top, and the reverse direction of the Z axis represents the bottom; the X axis in the drawings represents the horizontal direction, and is designated as the front and back position, and the positive direction of the X axis represents the front side, and the reverse direction of the X axis represents the back side; the Y axis in the drawings represents the left and right position, and the positive direction of the Y axis represents the left side, and the reverse direction of the Y axis represents the right side. It should also be noted that the aforementioned Z axis, Y axis, and X axis 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, and therefore cannot be understood as a limitation on the present invention.

[0033] The term "including" and its variations used in this document are open inclusions, that is, "including but not limited to"; the term "based on" means "based at least in part on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one other embodiment"; the term "some embodiments" means "at least some embodiments"; the term "optionally" means "optional embodiments". The relevant definitions of other terms will be given in the following description. It should be noted that the concepts of "first", "second", etc. mentioned in the present invention are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0034] It should be noted that the modifications of "one" and "plurality" mentioned in the present invention are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0035] The present invention provides a working roll bending balancing device for a medium and thick plate rolling mill with shifted rolls, so as to reduce the risk of the upper hydraulic cylinder rod being broken by shear force.

[0036] like Figures 1 to 4As shown, an embodiment of the present invention provides a working roll bending balancing device for a medium and thick plate rolling mill with shifted rolls, comprising a balancing cylinder block 1 and a movable cover 2; four balancing cylinder blocks 1 are used to be respectively installed on two operating side columns 3 and two transmission side columns 4, and the upper part of the balancing cylinder block 1 is provided with a first oil chamber 11 and a second oil chamber 12 arranged along the axial interval of the upper working roll bearing seat 5, a first upper cylinder rod 111 is slidably installed in the first oil chamber 11, and a second upper cylinder rod 121 is slidably installed in the second oil chamber 12, and the balancing cylinder block 1 is also provided with a lower oil chamber 121 connected to the first oil chamber 11. The first oil supply circuit connected to the first end and the second oil supply circuit connected to the lower end of the second oil chamber 12, the first oil supply circuits of the two balancing cylinder blocks 1 on the two operating side columns 3 or the two transmission side columns 4 are connected to each other, and the second oil supply circuits of the two balancing cylinder blocks 1 are connected to each other; the movable cover 2 includes an abutment plate 21, the lower side surface of the abutment plate 21 respectively abuts against the upper end of the first upper cylinder rod 111 and the upper end of the second upper cylinder rod 121, and the upper side surface of the abutment plate 21 is used to abut against the outwardly extending wing 51 of the upper working roll bearing seat 5.

[0037] It should be noted that the axial direction of the upper working roll bearing seat 5 is as follows: Figure 3 It is also necessary to explain that the medium and thick plate rolling mill with shifted rolls usually includes two operating side columns 3 and two transmission side columns 4, the two operating side columns 3 constitute the operating side frame of the rolling mill, and the two transmission side columns 4 constitute the transmission side frame of the rolling mill. The working roll bending balancing device is used to be arranged in the medium and thick plate rolling mill with shifted rolls, and the four balancing cylinder blocks 1 can be respectively installed on the waist sections of the two operating side columns 3 and the waist sections of the two transmission side columns 4. It should also be noted that, for the first upper cylinder rod 111 slidably installed in the first oil chamber 11, the upper end of the first upper cylinder rod 111 usually needs to extend out of the first oil chamber 11, and the first upper cylinder rod 111 can slide up and down in the first oil chamber 11, thereby realizing the lifting and lowering of the first upper cylinder rod 111; for the second upper cylinder rod 121 slidably installed in the second oil chamber 12, the upper end of the second upper cylinder rod 121 usually needs to extend out of the second oil chamber 12, and the second upper cylinder rod 121 can slide up and down in the second oil chamber 12, thereby realizing the lifting and lowering of the second upper cylinder rod 121.

[0038] In the present embodiment, since the working roll bending roll balancing device includes a movable cover 2, and the lower side surfaces of the abutment plate 21 of the movable cover 2 abut against the upper ends of the first upper cylinder rod 111 and the second upper cylinder rod 121 respectively, the upper side surface of the abutment plate 21 is used to abut against the outwardly extending wing 51 of the upper working roll bearing seat 5, so that the abutment plate 21 and the upper cylinder rod are in a non-fixed connection relationship, and the abutment plate 21 and the outwardly extending wing 51 of the upper working roll bearing seat 5 are also in a non-fixed connection relationship. When the upper working roll bearing seat 5 moves axially with the upper working roll, the outwardly extending wing 51 of the upper working roll bearing seat 5 can move along the upper side surface of the abutment plate 21 without causing the upper end of the upper cylinder rod to deflect relative to the lower end, thereby reducing the risk of the upper cylinder rod being broken by shear force. In addition, since the balancing cylinder block 1 is provided with a first oil supply oil circuit connected to the lower end of the first oil chamber 11 and a second oil supply oil circuit connected to the lower end of the second oil chamber 12, the first oil supply oil circuits of the two balancing cylinder blocks 1 on the two operating side columns 3 or the two transmission side columns 4 are connected to each other, and the second oil supply oil circuits of the two balancing cylinder blocks 1 are connected to each other, so that the two connected first oil supply oil circuits can be used to synchronously pressurize the lower parts of the two first oil chambers 11 to enhance the bending roll force provided upward by the two first upper cylinder rods 111, and the two connected second oil supply oil circuits can be used to synchronously pressurize the lower parts of the two second oil chambers 12 to enhance the bending roll force provided upward by the two first upper cylinder rods 111. To increase the bending roll force provided upward by the two second upper cylinder rods 121, when the upper working roll bearing seat 5 moves axially and brings the center of gravity closer to the two first upper cylinder rods 111, the lower portions of the two first oil chambers 11 can be pressurized simultaneously to increase the bending roll force of the two first upper cylinder rods 111. When the upper working roll bearing seat 5 moves axially and brings the center of gravity closer to the two second upper cylinder rods 121, the lower portions of the two second oil chambers 12 can be pressurized simultaneously to increase the bending roll force of the two second upper cylinder rods 121, thereby avoiding unbalanced force when the upper working roll bearing seat 5 moves axially, thereby preventing the bearing from burning out due to uneven force.

[0039] Alternatively, if Figure 2 and Figure 6 As shown, the abutment plate 21 includes a body 211 and a first slide plate 212 installed at the lower end of the body 211 , and the first slide plate 212 abuts against the upper end of the first upper cylinder rod 111 and the upper end of the second upper cylinder rod 121 respectively.

[0040] The first slide plate 212 may be made of a material with high wear resistance. In addition, the first slide plate 212 may be detachably connected to the body 211 to facilitate replacement of the first slide plate 212 .

[0041] In this optional embodiment, the abutment plate 21 abuts against the first upper cylinder rod 111 and the second upper cylinder rod 121 through the first slide plate 212. The first slide plate 212 has good wear resistance and can reduce the wear caused by contact with the upper cylinder rod, thereby increasing the service life of the movable cover 2.

[0042] Alternatively, if Figure 2 and Figure 7 As shown, the abutment plate 21 further includes a second slide plate 213 installed at the upper end of the body 211 , and the second slide plate 213 is used to abut against the outwardly extending wing 51 of the upper working roll bearing seat 5 .

[0043] The second slide plate 213 may be made of a material with high wear resistance. In addition, the second slide plate 213 may be detachably connected to the body 211 to facilitate replacement of the second slide plate 213 .

[0044] In this optional embodiment, the abutment plate 21 abuts against the outwardly extending wing 51 of the upper working roll bearing seat 5 through the second slide plate 213. The second slide plate 213 has good wear resistance and can reduce the wear caused by contact with the outwardly extending wing 51, thereby increasing the service life of the movable cover 2.

[0045] Alternatively, if Figure 2 , Figure 4 , Figure 6 , Figure 8 and Fig. 9 As shown, the balancing cylinder block 1 has a first side wall 13, a second side wall 14 and a third side wall 15, the first side wall 13 is opposite to the peripheral side wall 52 of the upper working roll bearing seat 5 in the radial direction of the upper working roll bearing seat 5, and the second side wall 14 and the third side wall 15 are relatively arranged along the axial direction of the upper working roll bearing seat 5; the movable cover 2 also includes a first enclosure 22, a second enclosure 23 and a third enclosure 24 connected to the abutment plate 21, the first enclosure 22 is slidably connected to the first side wall 13, the second enclosure 23 is slidably connected to the second side wall 14, and the third enclosure 24 is slidably connected to the third side wall 15.

[0046] It should be noted that the radial direction of the upper working roll bearing seat 5 is as follows: Figure 3 The X-axis direction is shown.

[0047] In this optional embodiment, the first enclosure 22 of the movable cover 2 is slidably connected to the first side wall 13 of the balancing cylinder block 1, the second enclosure 23 of the movable cover 2 is slidably connected to the second side wall 14 of the balancing cylinder block 1, and the third enclosure 24 of the movable cover 2 is slidably connected to the third side wall 15 of the balancing cylinder block 1. In this way, the three enclosures can form a protective space for the balancing cylinder block 1, thereby protecting the balancing cylinder block 1, and the enclosures and the side walls are slidably connected to facilitate the installation of the movable cover 2 on the balancing cylinder block 1.

[0048] Alternatively, if Figure 4 , Figure 6 , Figure 7 and Figure 8As shown, the first side wall 13 is installed with a first guide slide 131; the peripheral side wall 52 of the upper working roll bearing seat 5 is installed with a second guide slide 521; the side of the first enclosure 22 close to the first side wall 13 is installed with a third slide 221 that slides with the first guide slide 131, and the side of the first enclosure 22 away from the first side wall 13 is installed with a fourth slide 222 that slides with the second guide slide 521.

[0049] Specifically, the first guide slide 131 can be detachably connected to the first side wall 13 to facilitate replacement of the first guide slide 131. Similarly, the second guide slide 521 can also be detachably connected to the upper working roll bearing seat 5, and the third slide 221 and the fourth slide 222 can also be detachably connected to the first enclosure 22.

[0050] In this optional embodiment, the third slide plate 221 installed on the first enclosure 22 is slidably matched with the first guide slide plate 131 installed on the first side wall 13, that is, the first enclosure 22 and the first side wall 13 are not in direct contact, but a sliding connection is achieved through the contact between the third slide plate 221 and the first guide slide plate 131, which can avoid wear of the first enclosure 22 and the first side wall 13 due to direct contact, and the contact between the third slide plate 221 and the first guide slide plate 131 is the contact between the plates, which allows a certain offset along the plate surface, and can better adapt to the slight position changes that may occur during the rolling process of the rolling mill. Furthermore, the structure of the contact between the third slide plate 221 and the first guide slide plate 131 is relatively simple, and is easier to install. The fourth slide plate 222 installed on the first enclosure plate 22 is slidably matched with the second guide slide plate 521 installed on the peripheral side wall 52 of the upper working roll bearing seat 5, that is, the first enclosure plate 22 is not in direct contact with the peripheral side wall 52 of the upper working roll bearing seat 5, but a sliding connection is achieved through the contact between the fourth slide plate 222 and the second guide slide plate 521, which can avoid wear of the first enclosure plate 22 and the peripheral side wall 52 of the upper working roll bearing seat 5 due to direct contact, and the contact between the fourth slide plate 222 and the second guide slide plate 521 is the contact between the plates, which allows a certain offset along the plate surface, and can better adapt to the slight position changes that may occur during the rolling process of the rolling mill. Moreover, the structure of the contact between the fourth slide plate 222 and the second guide slide plate 521 is relatively simple, and it is easier to install.

[0051] Alternatively, if Figure 4 , Figure 6 and Figure 8 As shown, the second side wall 14 is provided with a third guide slide 141, and the side of the second enclosure 23 close to the second side wall 14 is provided with a fifth slide 231 which is slidably matched with the third guide slide 141; and / or, Figure 4 , Figure 6 and Figure 8As shown, the third side wall 15 is installed with a fourth guide slide 151 , and the side of the third enclosure 24 close to the third side wall 15 is installed with a sixth slide 241 slidably matched with the fourth guide slide 151 .

[0052] Specifically, the third guide slide 141 can be detachably connected to the second side wall 14 to facilitate replacement of the third guide slide 141. Similarly, the fifth slide 231 can also be detachably connected to the second enclosure 23, the fourth guide slide 151 can also be detachably connected to the third side wall 15, and the sixth slide 241 can also be detachably connected to the third enclosure 24.

[0053] In this optional embodiment, the fifth slide plate 231 installed on the second enclosure 23 is slidably matched with the third guide slide plate 141 installed on the second side wall 14, that is, the second enclosure 23 is not in direct contact with the second side wall 14, but is slidably connected by the contact between the fifth slide plate 231 and the third guide slide plate 141, which can avoid the wear of the second enclosure 23 and the second side wall 14 due to direct contact. The sixth slide plate 241 installed on the third enclosure 24 is slidably matched with the fourth guide slide plate 151 installed on the third side wall 15, that is, the third enclosure 24 is not in direct contact with the third side wall 15, but is slidably connected by the contact between the sixth slide plate 241 and the fourth guide slide plate 151, which can avoid the wear of the third enclosure 24 and the third side wall 15 due to direct contact.

[0054] Alternatively, if Figure 6 and Figure 8 As shown, the second side wall 14 is provided with a first slide groove 142 extending up and down, and the side of the second enclosure 23 close to the second side wall 14 is equipped with a first slider 232 slidably matched with the first slide groove 142; and / or, the third side wall 15 is provided with a second slide groove 152 extending up and down, and the side of the third enclosure 24 close to the third side wall 15 is equipped with a second slider 242 slidably matched with the second slide groove 152.

[0055] In this optional embodiment, the first slider 232 installed on the second enclosure 23 is slidably matched with the first slide groove 142 installed on the second side wall 14. In this way, in the process of installing the movable cover 2 to the balancing cylinder block 1, the first slider 232 can be connected to the first slide groove 142 first, and then the movable cover 2 is lowered, and finally the movable cover 2 is covered on the balancing cylinder block 1. Because of the cooperation between the first slider 232 and the first slide groove 142, the movable cover 2 will not have a large horizontal displacement during the lowering process, thereby ensuring the installation accuracy of the movable cover 2 on the balancing cylinder block 1. The second slider 242 installed on the third enclosure 24 is slidably matched with the second slide groove 152 installed on the third side wall 15. In this way, in the process of installing the movable cover 2 to the balancing cylinder block 1, the second slider 242 can be connected to the second slide groove 152 first, and then the movable cover 2 is lowered, and finally the movable cover 2 is covered on the balancing cylinder block 1. Because of the cooperation between the second slider 242 and the second slide groove 152, the movable cover 2 will not have a large horizontal displacement during the lowering process, thereby ensuring the installation accuracy of the movable cover 2 on the balancing cylinder block 1.

[0056] Optionally, a third oil supply circuit is further provided in the balancing cylinder block 1, which is respectively connected to the upper end of the first oil chamber 11 and the upper end of the second oil chamber 12, and the third oil supply circuits of the two balancing cylinder blocks 1 on the two operating side columns 3 or the two transmission side columns 4 are connected to each other.

[0057] In this optional embodiment, the third oil supply circuit is connected to the upper end of the first oil chamber 11 and the upper end of the second oil chamber 12 respectively, and the third oil supply circuits of the two balancing cylinder blocks 1 on the two operating side columns 3 or the two transmission side columns 4 are connected to each other, that is, the upper ends of the two first oil chambers 11 and the upper ends of the two second oil chambers 12 are connected to each other. In this way, when adjusting the roll gap or replacing the upper working roll, oil can be supplied to the upper ends of the two first oil chambers 11 and the upper ends of the two second oil chambers 12 at the same time through the third oil supply circuit, thereby ensuring that the four upper cylinder rods descend synchronously, thereby improving the stability of the upper working roll falling back.

[0058] Optionally, it also includes a hydraulic system, which includes a first branch oil pipe, a second branch oil pipe and a third branch oil pipe; the first oil supply circuits of the two balancing cylinder blocks 1 on the two operating side columns 3 or the two transmission side columns 4 are connected to the first branch oil pipe, the second oil supply circuits of the two balancing cylinder blocks 1 are connected to the second branch oil pipe, and the third oil supply circuits of the two balancing cylinder blocks 1 are connected to the third branch oil pipe.

[0059] In this optional embodiment, the first oil supply circuits of the two balancing cylinder blocks 1 on the two operating side columns 3 or the two transmission side columns 4 are connected to the first branch oil pipe to achieve mutual connectivity between the two first oil supply circuits, the second oil supply circuits of the two balancing cylinder blocks 1 are connected to the second branch oil pipe to achieve mutual connectivity between the two second oil supply circuits, and the third oil supply circuits of the two balancing cylinder blocks 1 are connected to the third branch oil pipe to achieve mutual connectivity between all third oil supply circuits.

[0060] Alternatively, if Figure 5 and Fig.10 As shown, the lower part of the balancing cylinder block 1 is provided with a third oil chamber 16 and a fourth oil chamber 17 which are arranged at intervals along the axial direction of the lower working roll bearing seat 6, a first lower cylinder rod 18 is slidably installed in the third oil chamber 16, and a second lower cylinder rod 19 is slidably installed in the fourth oil chamber 17, and the lower end of the first lower cylinder rod 18 and the lower end of the second lower cylinder rod 19 are used to be connected to the lower working roll bearing seat 6.

[0061] In this optional embodiment, the lower end of the first lower cylinder rod 18 and the lower end of the second lower cylinder rod 19 can be connected to the lower working roll bearing seat 6. In this way, when the first lower cylinder rod 18 and the second lower cylinder rod 19 are working, they can drive the lower working roll bearing seat 6 to rise and fall, and cooperate with the upper working roll, thereby changing the roll gap convexity of the rolling mill to ensure the straightness of the rolled plate.

[0062] Although the present invention is disclosed as above, the protection scope of the present invention is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. A working roll bending and balancing device for a medium and thick plate rolling mill with roll shifting, characterized in that: The invention comprises a balancing cylinder block (1) and a movable cover (2); four balancing cylinder blocks (1) are used to be respectively mounted on two operating side columns (3) and two transmission side columns (4); the upper part of the balancing cylinder block (1) is provided with a first oil chamber (11) and a second oil chamber (12) which are arranged in an axial direction of an upper working roll bearing seat (5) at intervals; a first upper cylinder rod (111) is slidably mounted in the first oil chamber (11); a second upper cylinder rod (121) is slidably mounted in the second oil chamber (12); the balancing cylinder block (1) is also provided with a first oil supply passage which is communicated with the lower end of the first oil chamber (11) and a second oil supply passage which is communicated with the lower end of the first oil chamber (11). The second oil supply circuit is connected to the lower end of the second oil chamber (12); the first oil supply circuits of the two balancing cylinder blocks (1) on the two operating side columns (3) or the two transmission side columns (4) are connected to each other; and the second oil supply circuits of the two balancing cylinder blocks (1) are connected to each other; the movable cover (2) comprises an abutment plate (21); the lower side surface of the abutment plate (21) abuts against the upper end of the first upper cylinder rod (111) and the upper end of the second upper cylinder rod (121), respectively; and the upper side surface of the abutment plate (21) is used to abut against the outwardly extending wing (51) of the upper working roll bearing seat (5).

2. The working roll bending and balancing device for a medium and thick plate rolling mill with roll shifting according to claim 1 is characterized in that: The abutment plate (21) comprises a body (211) and a first slide plate (212) mounted on the lower end of the body (211), wherein the first slide plate (212) abuts against the upper end of the first upper cylinder rod (111) and the upper end of the second upper cylinder rod (121), respectively.

3. The working roll bending and balancing device for a medium and thick plate rolling mill with roll shifting according to claim 2 is characterized in that: The abutment plate (21) further comprises a second slide plate (213) mounted on the upper end of the body (211), wherein the second slide plate (213) is used for abutting against the outwardly extending wing (51) of the upper working roll bearing seat (5).

4. The working roll bending and balancing device for a medium and thick plate rolling mill with roll shifting according to claim 1 is characterized in that: The balancing cylinder block (1) comprises a first side wall (13), a second side wall (14) and a third side wall (15), wherein the first side wall (13) is opposite to the peripheral side wall (52) of the upper working roll bearing seat (5) in the radial direction of the upper working roll bearing seat (5), and the second side wall (14) and the third side wall (15) are arranged opposite to each other along the axial direction of the upper working roll bearing seat (5); the movable cover (2) further comprises a first enclosure plate (22), a second enclosure plate (23) and a third enclosure plate (24) connected to the abutting plate (21), wherein the first enclosure plate (22) is slidably connected to the first side wall (13), the second enclosure plate (23) is slidably connected to the second side wall (14), and the third enclosure plate (24) is slidably connected to the third side wall (15).

5. The working roll bending and balancing device for a medium and thick plate rolling mill with roll shifting according to claim 4 is characterized in that: The first side wall (13) is provided with a first guide slide plate (131); the peripheral side wall (52) of the upper working roll bearing seat (5) is provided with a second guide slide plate (521); the side surface of the first enclosure plate (22) close to the first side wall (13) is provided with a third slide plate (221) which is slidably matched with the first guide slide plate (131); the side surface of the first enclosure plate (22) away from the first side wall (13) is provided with a fourth slide plate (222) which is used for slidably matching with the second guide slide plate (521).

6. The working roll bending and balancing device for a medium and thick plate rolling mill with roll shifting according to claim 4 is characterized in that: The second side wall (14) is provided with a third guide slide plate (141), and a side surface of the second enclosure plate (23) close to the second side wall (14) is provided with a fifth slide plate (231) slidably matched with the third guide slide plate (141); and / or, The third side wall (15) is installed with a fourth guide slide plate (151), and the side surface of the third enclosure plate (24) close to the third side wall (15) is installed with a sixth slide plate (241) which is slidably matched with the fourth guide slide plate (151).

7. The working roll bending and balancing device for a medium and thick plate rolling mill with roll shifting according to claim 6 is characterized in that: The second side wall (14) is provided with a first sliding groove (142) extending up and down, and a first sliding block (232) slidably matched with the first sliding groove (142) is installed on the side of the second enclosure (23) close to the second side wall (14); and / or, The third side wall (15) is provided with a second slide groove (152) extending up and down, and the side surface of the third enclosure (24) close to the third side wall (15) is provided with a second sliding block (242) which is slidably matched with the second slide groove (152).

8. The working roll bending and balancing device for a medium and thick plate rolling mill with roll shifting according to claim 1, characterized in that: The balancing cylinder block (1) is also provided with a third oil supply passage which is respectively connected to the upper end of the first oil chamber (11) and the upper end of the second oil chamber (12); the third oil supply passages of the two balancing cylinder blocks (1) on the two operating side columns (3) or the two transmission side columns (4) are connected to each other.

9. The working roll bending and balancing device for a medium and thick plate rolling mill with roll shifting according to claim 8, characterized in that: It also includes a hydraulic system, which includes a first branch oil pipe, a second branch oil pipe and a third branch oil pipe; the first oil supply circuits of the two balancing cylinder blocks (1) on the two operating side columns (3) or the two transmission side columns (4) are connected to the first branch oil pipe, the second oil supply circuits of the two balancing cylinder blocks (1) are connected to the second branch oil pipe, and the third oil supply circuits of the two balancing cylinder blocks (1) are connected to the third branch oil pipe.

10. The working roll bending and balancing device for a medium and thick plate rolling mill with roll shifting according to claim 1, characterized in that: The lower part of the balancing cylinder block (1) is provided with a third oil chamber (16) and a fourth oil chamber (17) which are spaced apart along the axial direction of the lower working roll bearing seat (6); a first lower cylinder rod (18) is slidably installed in the third oil chamber (16); a second lower cylinder rod (19) is slidably installed in the fourth oil chamber (17); the lower end of the first lower cylinder rod (18) and the lower end of the second lower cylinder rod (19) are used to be connected to the lower working roll bearing seat (6).

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