CN212944657U

CN212944657U - Lifting device for roller system of cogging mill

Info

Publication number: CN212944657U
Application number: CN202021189792.9U
Authority: CN
Inventors: 梁祖红; 高林; 刘超群
Original assignee: China Erzhong Group Deyang Heavy Industries Co Ltd
Current assignee: Erzhong Deyang Heavy Equipment Co Ltd; China Erzhong Group Deyang Heavy Industries Co Ltd
Priority date: 2020-06-23
Filing date: 2020-06-23
Publication date: 2021-04-13
Anticipated expiration: 2030-06-23

Abstract

The utility model discloses cogging mill roller is elevating gear belongs to the metallurgical field, and the purpose is solved the roll change in-process, the big problem of sliding friction between roll change dolly bearing backing plate and the frame bearing plate. Comprises a roll changing trolley and a lower beam of a cogging mill; and a set of roller system lifting mechanism is respectively arranged on the outlet operation side, the outlet transmission side, the inlet operation side and the inlet transmission side of the cogging mill, each set of roller system lifting mechanism is arranged on the lower cross beam, and the top end of each set of roller system lifting mechanism is matched with the wheel of the roll changing trolley. The utility model discloses, through the setting of roller system elevating system, sliding friction between change roller dolly bearing backing plate and frame bearing plate when being cogging mill roll change changes the wheel and roll change track roll friction within a definite time with old roller, can effectively simplify roll change structure and roll change step, shortens the roll change time of cogging mill, improves production efficiency. The abrasion and the abrasion between the roll changing trolley and the rack bearing plate caused by the sliding friction between the roll changing trolley bearing plate and the rack bearing plate can be avoided, and the service life of the roll changing trolley bearing plate and the rack bearing plate is prolonged.

Description

Lifting device for roller system of cogging mill

Technical Field

The utility model belongs to the metallurgy field, it is specifically elevating gear that cogging mill roller is.

Background

The lifting device of the roller system of the cogging mill is an indispensable part in cogging mill equipment and is used for pulling the old roller system out of the cogging mill and pushing the new roller system into the cogging mill when the rollers are changed.

At present, when a cogging mill changes rolls, in order to ensure that wheels of a roll changing trolley are not stressed when the cogging mill works, rolling force can be transmitted to a rack from a bearing base plate on the roll changing trolley through a bearing plate, when a roll changing device pushes a roll system into or pulls the roll system out of the cogging mill, the roll system runs on a general roll changing track in a rolling mode through the wheels on the roll changing trolley, but the movement mode of the roll system is changed into a sliding mode between the bearing base plate of the roll changing trolley and the bearing plate of the rack at a position where the roll system is close to a working position (namely, the central line of a bearing seat in the direction of a machine column is close to and coincident with the central line of the rack). Due to the fact that the friction force of sliding friction is large, when the roller system approaches to a working position, the roller system is difficult to push in or pull out of the cogging mill by the roller changing electric trolley. Therefore, the cogging mill is provided with a set of hydraulic roll-changing transition device which can provide large push-pull force at the roll-changing side of the cogging mill, when the roll system slides and rubs in the cogging mill, the transition device is used for pulling out or pushing in the roll system, and then the electric trolley is used for pushing and pulling the roll system. Because this transition structure is at the roll change platform downside, consequently need set up one set of automatic bolt device and realize being connected of roll change transition device and roll change dolly.

The roll changing mode has a complex structure, needs to be provided with a roll changing transition device, has more roll changing actions and needs to be carried out in a segmented mode, thereby greatly influencing the roll changing rhythm and increasing the roll changing time. Meanwhile, the transition device is arranged below the roll changing platform, and the installation and the maintenance are inconvenient. In addition, when the roller is replaced, the bearing backing plate of the roller changing trolley and the bearing plate of the rack slide relatively, the friction mode is sliding friction, and the bearing backing plate of the roller changing trolley and the bearing plate of the rack are abraded mutually due to long-time friction.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a cogging mill roller is elevating gear is provided to solve the roll change in-process, the big problem of sliding friction between roll change dolly pressure-bearing backing plate and the frame pressure-bearing plate.

The utility model adopts the technical proposal that: the cogging mill roll system lifting device comprises a roll changing trolley and a lower beam of the cogging mill; and a set of roller system lifting mechanism is respectively arranged on the outlet operation side, the outlet transmission side, the inlet operation side and the inlet transmission side of the cogging mill, each set of roller system lifting mechanism is arranged on the lower cross beam, and the top end of each set of roller system lifting mechanism is matched with the wheel of the roll changing trolley.

Furthermore, each set of the roller system lifting mechanism comprises a lifting hydraulic cylinder, a guide sleeve and a guide shaft; the lifting hydraulic cylinder is arranged on the lower cross beam, the guide sleeve is vertically arranged on the lower cross beam, the guide shaft is inserted in the guide sleeve, the bottom end of the guide shaft is matched with the lifting hydraulic cylinder, the top end of the guide shaft acts on the roll changing trolley, and the guide shaft is vertically matched with the guide sleeve in a movable mode.

Further, a spherical concave surface which is recessed inwards along the vertical direction is arranged at the bottom end of the guide shaft; the end face of the piston rod end of the lifting hydraulic cylinder is a spherical convex surface, and the piston rod end of the lifting hydraulic cylinder is inserted into the spherical concave surface of the guide shaft.

Furthermore, the lifting hydraulic cylinder is arranged on the lower cross beam through the mounting bottom plate.

Furthermore, a lifting head is detachably connected to the top end of the guide shaft.

Furthermore, the top end of the guide shaft is provided with a groove which is recessed downwards along the axial direction of the guide shaft, the bottom of the lifting head is provided with a lug which protrudes downwards, the lug of the lifting head is inserted into the groove, and the guide shaft is connected with the lifting head through a connecting screw.

Furthermore, a fixing block is arranged on the lower cross beam, a through hole which is vertically communicated is formed in the fixing block, and the guide sleeve is arranged in the through hole.

Furthermore, still include the safety cover, the safety cover sets up in the outside that corresponds hydraulic cylinder to be connected with the bottom end rail.

The utility model has the advantages that: the utility model discloses, through the setting of roller system elevating system, the slip friction between change roller dolly pressure-bearing backing plate and the frame pressure-bearing plate when changing the roller with old roller system cogging mill changes wheel and roll friction between the roll change track into to roll change is whole all can adopt electronic dolly push-and-pull roller system, can effectively simplify roll change structure and roll change step, makes roll change rhythm more brief smooth-going, shortens cogging mill's roll change time, improves production efficiency. The abrasion and the abrasion between the roll changing trolley and the rack bearing plate caused by the sliding friction between the roll changing trolley bearing plate and the rack bearing plate are effectively avoided, and the service life of the roll changing trolley bearing plate and the rack bearing plate is prolonged. The roll system lifting mechanism has simple structure and low investment cost, does not need to be provided with a hydraulic roll changing transition device and an automatic bolt device, and can effectively reduce the equipment investment and the later maintenance cost.

Drawings

FIG. 1 is a front view of the present invention;

fig. 2 is a left side view of the present invention;

fig. 3 is a partially enlarged view of a portion a of fig. 1.

In the figure, a roll changing trolley 1, a pressure bearing backing plate 11, a frame pressure bearing plate 12, a lower cross beam 2, a fixing block 21, a through hole 211, a roll system lifting mechanism 3, a mounting bottom plate 31, a lifting hydraulic cylinder 32, a guide sleeve 33, a guide shaft 34, a spherical concave surface 341, a groove 342, a lifting head 35, a convex block 351, a protective cover 36 and a connecting screw 37.

Detailed Description

The invention is further described below with reference to the following figures and examples:

the cogging mill roll system lifting device comprises a roll changing trolley 1 and a lower beam 2 of the cogging mill as shown in figure 1 or figure 2; a set of roller system lifting mechanism 3 is respectively arranged on the outlet operation side, the outlet transmission side, the inlet operation side and the inlet transmission side of the cogging mill, each set of roller system lifting mechanism 3 is arranged on the lower beam 2, and the top end of the roller system lifting mechanism is matched with the wheels of the roller changing trolley 1.

The utility model discloses, through in cogging mill export operation side, export transmission side, entry operation side and entry transmission side set up one set of roller respectively and are elevating system 3, the roll change in-process, can lift up or fall the cogging mill roller system through roller system elevating system 3, realize breaking away from and laminating of bearing backing plate 11 and frame bearing plate 12 of roll change dolly 1, wheel on the whole roll change in-process roller system and roll change dolly 1 just all accessible roll change dolly 1 is with rolling mode business turn over cogging mill on the roll change track, sliding friction between bearing backing plate 11 and the frame bearing plate 12 of roll change dolly 1 has been reduced, the push-and-pull power of pulling out the cogging mill with old roller system and pushing the cogging mill with new roller system has not only been reduced, still slowly reduced wearing and tearing, the life of frame bearing plate 12 has been prolonged. And the push-pull force of the roll changing is reduced, so that an extra push-pull structure with larger push-pull force is not needed, the structure of the roll changing device is simplified, the roll changing rhythm of the cogging mill is improved, and the roll changing time is shortened.

The roll system lifting mechanism can be a jack and the like, and can be used in a cogging mill as long as the lifting function is completed, in the utility model, as shown in fig. 1, fig. 2 or fig. 3, each set of the roll system lifting mechanism 3 comprises a lifting hydraulic cylinder 32, a guide sleeve 33 and a guide shaft 34; the lifting hydraulic cylinder 32 is arranged on the lower cross beam 2, the guide sleeve 33 is vertically arranged on the lower cross beam 2, the guide shaft 34 is inserted into the guide sleeve 33, the bottom end of the guide shaft is matched with the lifting hydraulic cylinder 32, the top end of the guide shaft acts on the roll changing trolley 1, and the guide shaft 34 is vertically matched with the guide sleeve 33 in a movable mode.

Wherein, the lifting hydraulic cylinder 32 provides jacking force for jacking; the guide shaft 34 is connected with the lifting hydraulic cylinder 32 and the roll changing trolley 1 and plays a role of transmitting the stroke of the lifting hydraulic cylinder 32 to the roll changing trolley 1; the guide sleeve 33 serves as a guide to prevent the guide shaft 34 from deviating.

In order to form self-positioning between the guide shaft 34 and the piston rod of the hydraulic lifting cylinder 32 and facilitate the mounting and dismounting of the guide shaft 34 and the hydraulic lifting cylinder 32, preferably, the bottom end of the guide shaft 34 is provided with a spherical concave surface 341 which is recessed inwards along the vertical direction; the end surface of the piston rod end of the hydraulic lifting cylinder 32 is a spherical convex surface, and the piston rod end of the hydraulic lifting cylinder 32 is inserted into the spherical concave surface 341 of the guide shaft 34.

The lifting device further comprises a mounting bottom plate 31, and the lifting hydraulic cylinder 32 is mounted on the lower cross beam 2 through the mounting bottom plate 31.

Preferably, a lifting head 35 is detachably attached to the top end of the guide shaft 34.

Firstly, the lifting head 35 directly contacts with the roll changing trolley 1, acts on the wheels of the roll changing trolley 1 and protects the top end of the guide shaft 34. Furthermore, the guide shaft 34 is detachably connected with the lifting head 35, and after the lifting head 35 is damaged, the lifting head 35 can be directly replaced without replacing the guide shaft 34.

In order to facilitate the positioning and installation of the lifting head 35 and the guide shaft 34, it is preferable that the top end of the guide shaft 34 is provided with a groove 342 which is recessed downward along the axial direction thereof, the bottom of the lifting head 35 is provided with a projection 351 which protrudes downward, the projection 351 of the lifting head 35 is inserted into the groove 342, and the guide shaft 34 and the lifting head 35 are connected by the connection screw 37.

In order to facilitate the positioning and installation of the guide sleeve 33, it is preferable that a fixing block 21 is provided on the lower cross beam 2, a through hole 211 which vertically penetrates through the fixing block 21 is provided, and the guide sleeve 33 is installed in the through hole 211.

In order to protect the hydraulic lifting cylinder 32, the hydraulic lifting cylinder further comprises a protective cover 36, and the protective cover 36 is arranged on the outer side of the corresponding hydraulic lifting cylinder 32 and connected with the lower cross beam 2.

When the cogging mill works, the piston rod of the lifting hydraulic cylinder 32 retracts, the guide shaft 34 and the lifting head 35 descend together with the roll changing trolley 1 and the roll system, after the bearing backing plate 11 is contacted with the bearing plate 12, the lifting hydraulic cylinder 32 continues to retract, wheels of the roll changing trolley 1 are separated from the lifting head 35, at the moment, the wheels of the roll changing trolley 1 are suspended, the rolling force is not born, and the cogging mill can roll.

When the roller is changed, the piston rod of the lifting hydraulic cylinder 32 extends out, the guide shaft 34 and the lifting head 35 drive the roller changing trolley 1 and the roller system to ascend together, after the bearing backing plate 11 and the bearing plate 12 are separated, the lifting head 35 is continuously lifted to be flush with the roller changing track inside and outside the cogging mill, at the moment, the roller changing trolley 1 and the roller system can be pulled out through the roller changing electric trolley, and the pulling-out action of the old roller is completed. The same is true when a new roll is pushed in.

Claims

1. The cogging mill roll system lifting device comprises a roll changing trolley (1) and a lower beam (2) of the cogging mill; the method is characterized in that: a set of roller system lifting mechanism (3) is respectively arranged on the outlet operation side, the outlet transmission side, the inlet operation side and the inlet transmission side of the cogging mill, each set of roller system lifting mechanism (3) is arranged on the lower cross beam (2), and the top end of the roller system lifting mechanism is matched with the wheel of the roller changing trolley (1).

2. The cogging mill roll train lifting apparatus as claimed in claim 1, characterized in that: each set of the roller system lifting mechanism (3) comprises a lifting hydraulic cylinder (32), a guide sleeve (33) and a guide shaft (34); the roller changing trolley is characterized in that the lifting hydraulic cylinder (32) is arranged on the lower cross beam (2), the guide sleeve (33) is vertically installed on the lower cross beam (2), the guide shaft (34) is inserted into the guide sleeve (33), the bottom end of the guide shaft is matched with the lifting hydraulic cylinder (32), the top end of the guide shaft acts on the roller changing trolley (1), and the guide shaft (34) is vertically matched with the guide sleeve (33) in a movable mode.

3. The cogging mill roll train lifting apparatus as claimed in claim 2, characterized in that: the bottom end of the guide shaft (34) is provided with a spherical concave surface (341) which is recessed inwards along the vertical direction; the end surface of the piston rod end of the lifting hydraulic cylinder (32) is a spherical convex surface, and the piston rod end of the lifting hydraulic cylinder (32) is inserted into the spherical concave surface (341) of the guide shaft (34).

4. The cogging mill roll train lifting apparatus as claimed in claim 2, characterized in that: the lifting hydraulic cylinder is characterized by further comprising a mounting bottom plate (31), and the lifting hydraulic cylinder (32) is mounted on the lower cross beam (2) through the mounting bottom plate (31).

5. The cogging mill roll train lifting apparatus as claimed in claim 2, characterized in that: a lifting head (35) is detachably connected to the top end of the guide shaft (34).

6. The cogging mill roll train lifting apparatus as claimed in claim 5, wherein: the top end of the guide shaft (34) is provided with a groove (342) which is recessed downwards along the axial direction of the guide shaft, the bottom of the lifting head (35) is provided with a lug (351) which protrudes downwards, the lug (351) of the lifting head (35) is inserted into the groove (342), and the guide shaft (34) is connected with the lifting head (35) through a connecting screw (37).

7. The cogging mill roll train lifting apparatus as claimed in any of claims 2 to 6, characterized in that: a fixing block (21) is arranged on the lower cross beam (2), a through hole (211) which is vertically communicated is arranged on the fixing block (21), and the guide sleeve (33) is arranged in the through hole (211).

8. The cogging mill roll train lifting apparatus as claimed in any of claims 1 to 6, characterized in that: the lifting device is characterized by further comprising a protective cover (36), wherein the protective cover (36) is arranged on the outer side of the corresponding lifting hydraulic cylinder (32) and is connected with the lower cross beam (2).