Anti-rotation device for lifting hydraulic cylinder of ladle turret
By installing anti-rotation blocks and limit mechanisms on the hydraulic cylinder for lifting the ladle slewing table, the problem of relative rotation between the cylinder and the piston rod was solved, thereby improving the safety and reliability of the equipment and reducing maintenance costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-16
- Publication Date
- 2026-03-24
AI Technical Summary
In the existing technology, due to the characteristics of the thrust self-aligning roller bearing, the cylinder and piston rod of the hydraulic cylinder for lifting the ladle rotary table are prone to relative rotation, which leads to wear of the seals and oil leakage, posing safety hazards and increasing maintenance costs.
An anti-rotation block is installed on the cylinder body of the lifting hydraulic cylinder, and a limiting mechanism is installed on the slewing seat. The rotation of the cylinder body is restricted by the limiting groove and the elastic material layer, which prevents the relative rotation between the cylinder body and the plunger rod. The structure is simple and easy to install and maintain.
It effectively prevents relative rotation between the hydraulic cylinder body and the piston rod, reduces seal wear, avoids oil leakage, extends equipment life, and reduces maintenance costs.
Smart Images
Figure CN224026488U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application belongs to the field of continuous casting in the metallurgical industry, and particularly relates to a rotation-preventing device on a lifting hydraulic cylinder of a ladle turret. BACKGROUND
[0002] The ladle turret is a main equipment of a continuous casting machine, and the lifting hydraulic cylinder is a core part of the ladle turret. There are two lifting hydraulic cylinders, one on the left and one on the right, which separately control the rising and falling of the ladle.
[0003] The ladle turret body rotates, and the lifting hydraulic cylinder is installed on the rotating seat and rotates together. In theory, there is no relative rotation between the hydraulic cylinder barrel and the plunger rod, so no rotation-preventing device is designed for the lifting hydraulic cylinder. However, the barrel of the lifting hydraulic cylinder is equipped with a thrust self-aligning roller bearing, and the roller is spherical and has the function of automatic alignment. Due to the characteristics of this bearing, in the actual use process, the installation accuracy and the impact of the hydraulic pipeline of the lifting hydraulic cylinder will cause relative rotation between the hydraulic cylinder barrel and the plunger rod, which will further cause wear of the sealing element in the hydraulic cylinder, and eventually cause oil leakage and even production accidents.
[0004] Due to different application scenarios, the existing technology is usually based on how to control the rotation of the piston rod. For example, patent No. 2013207509808 discloses a servo hydraulic cylinder piston rod rotation-preventing device. The servo hydraulic cylinder includes a base, a protection cylinder installed on the base, and a lower end cover installed on the protection cylinder. The lower end of the piston rod is placed in the protection cylinder. The piston rod rotation-preventing device includes a horizontal anti-rotation plate and a vertical guide rod. The anti-rotation plate is fixedly installed on the lower end of the piston rod, and the anti-rotation plate is provided with a vertical through hole for the guide rod to pass through. The two ends of the guide rod are respectively installed on the lower end cover and the base. The guide rod passes through the vertical through hole and is located in the interlayer space between the piston rod and the protection cylinder. This type of rotation-preventing mechanism is usually arranged inside the hydraulic cylinder to limit the rotation of the piston rod, and is not suitable for solving the problem of relative rotation between the hydraulic cylinder barrel and the plunger rod when the barrel is equipped with a thrust self-aligning roller bearing. SUMMARY
[0005] The purpose of the present application is to solve the above technical problems, and provide a rotation-preventing device on the lifting hydraulic cylinder of the ladle turret, which has a very simple structure, is easy to install and maintain, can effectively prevent the relative rotation between the cylinder barrel and the plunger rod, eliminate safety hazards, improve the service life of the equipment, and reduce maintenance costs.
[0006] The technical scheme includes a rotating seat and a lifting hydraulic cylinder barrel installed on the rotating seat. The lifting hydraulic cylinder barrel is installed on the rotating seat through a thrust self-aligning roller bearing. The lifting hydraulic cylinder barrel is provided with an anti-rotation block. The rotating seat is provided with a limiting mechanism for limiting the displacement of the anti-rotation block.
[0007] The limiting mechanism is composed of a limiting section of the upper section and a connecting section of the lower section, the limiting section is provided with a limiting groove for corresponding insertion of the anti-rotation block towards the direction of the lifting hydraulic cylinder barrel body, and the connecting section is fixed on the rotary seat.
[0008] The anti-rotation block is cylindrical or square, and the limiting groove is also corresponding cylindrical or square.
[0009] The outer periphery of the anti-rotation block is covered with an elastic material layer.
[0010] The lower end of the connecting section is connected with a base, and the base is detachably fixed on the rotary seat through bolts.
[0011] The base is provided with a waist-shaped hole, and the bolts pass through the waist-shaped hole on the base and are connected with the rotary seat.
[0012] Beneficial effects:
[0013] In order to solve the problems in the background art, without changing the internal structure of the existing lifting hydraulic cylinder, the anti-rotation block is arranged on the lifting hydraulic cylinder barrel body, and the limiting mechanism for limiting the displacement of the anti-rotation block is arranged on the rotary seat, the limiting structure matched with the barrel body is arranged outside the barrel body to limit the rotation of the barrel body, thereby effectively preventing the relative rotation between the lifting hydraulic cylinder barrel body and the plunger rod. Further, considering that the barrel body may rotate in two directions, the limiting groove is opened in the direction of the lifting hydraulic cylinder barrel body in the limiting section, when the anti-rotation block is inserted into the limiting groove, the rotation of the barrel body in two directions can be effectively limited; preferably, the outer periphery of the anti-rotation block is covered with an elastic material layer, on the one hand, the rigid contact between the anti-rotation block and the limiting groove is avoided, on the other hand, the fit after the insertion of the two is more compact, the problem of small angle deflection of the barrel body caused by the existence of the gap is reduced, and the limiting effect is further improved; the limiting section and the rotary seat are detachably connected, which is convenient for the maintenance and maintenance of the lifting hydraulic cylinder; by arranging the waist-shaped hole, the installation position of the limiting structure can be adjusted within a certain range, and the corresponding installation of the anti-rotation block on the barrel body of the lifting hydraulic cylinder can be adapted. The utility model has the advantages of simple structure, easy installation and maintenance, effective prevention of relative rotation between the cylinder barrel body and the plunger rod, elimination of safety hazards, improvement of equipment service life, and reduction of maintenance cost. BRIEF DESCRIPTION OF DRAWINGS
[0014] Figure 1 It is a structural schematic diagram of the utility model.
[0015] Figure 2 It is a front view of the limiting mechanism of the utility model.
[0016] Figure 3 It is a top view of the limiting mechanism of the utility model
[0017] Figure 4 Partial installation plan view of the anti-rotation block and the anti-rotation mechanism.
[0018] Wherein, 1-lifting hydraulic cylinder barrel, 2-thrust aligning roller bearing, 3-anti-rotation block, 3.1-elastic material layer, 4-limiting mechanism, 4.1-limiting section, 4.2-connecting section, 4.3-limiting slot, 4.4-base, 4.5-waist-shaped hole, 5-rotary seat, 6-bolt. DETAILED DESCRIPTION
[0019] The utility model will be further explained in connection with the drawings:
[0020] Referring to Figures 1-3 , lifting hydraulic cylinder barrel 1 is installed on rotary seat 5 through thrust aligning roller bearing 2, anti-rotation block 3 is arranged on lifting hydraulic cylinder barrel 1, and limiting mechanism 4 for limiting the displacement of anti-rotation block 3 is arranged on rotary seat 5.
[0021] As another embodiment, limiting mechanism 4 is composed of limiting section 4.1 of the upper section and connecting section 4.2 of the lower section, limiting slot 4.3 for corresponding insertion of anti-rotation block 3 is opened in the direction of lifting hydraulic cylinder barrel 1 of connecting section 4.2, and connecting section 4.2 is fixed on rotary seat 5; the setting of limiting slot 4.3 can limit anti-rotation block in two directions, and prevent the rotation of lifting hydraulic cylinder barrel 1 in two directions. Anti-rotation block 3 can be cylindrical or square, and limiting slot 4.3 is also corresponding cylindrical or square. The outer periphery of anti-rotation block 3 is covered with elastic material layer 3.1, which avoids the rigid contact between anti-rotation block 3 and limiting slot 4.3 on the one hand, and on the other hand, the fit after insertion is more compact, reduces the problem of small-angle deflection of the barrel caused by the existence of gap, and further improves the limiting effect.
[0022] As another embodiment, the lower end of connecting section 4.2 is connected with base 4.4, a plurality of waist-shaped holes 4.5 are arranged on the base, and bolt 6 is detachably connected with rotary seat 5 by passing through waist-shaped hole 4.5 on the base.
[0023] When in use, anti-rotation block 3 on lifting hydraulic cylinder barrel 1 is inserted into limiting slot 4.3 of limiting section 4.1 of the upper section of limiting mechanism 4 for limiting, and the relative position of base 4.4 on rotary seat 5 can be adjusted through the cooperation of waist-shaped hole 4.5 and bolt 6, so that limiting slot 4.3 can be better matched with anti-rotation block 3 for insertion. When maintenance or repair is needed, bolt 6 is removed, and limiting device 4 is withdrawn as a whole to the outside, so that the limiting relationship between anti-rotation block 3 and limiting device is released, thereby facilitating the replacement or repair of lifting hydraulic cylinder barrel 1.
[0024] The utility model discloses the structure has guaranteed that the relative rotation of lift hydraulic cylinder barrel body 1 and piston rod will not have, actual use, the rotation of lift hydraulic cylinder barrel body 1 can be limited within 0.5 degrees, avoided the rotation wear and tear of the sealing element in hydraulic cylinder, avoided hydraulic cylinder oil leakage, avoided production accident, improved the service life of equipment, reduced the maintenance cost.
Claims
1. A ladle turret lifting hydraulic cylinder anti-rotation device, comprising a rotating seat and a lifting hydraulic cylinder barrel body installed on the rotating seat, characterized in that, The lifting hydraulic cylinder barrel is installed on the rotating seat through a thrust self-aligning roller bearing, the lifting hydraulic cylinder barrel is provided with an anti-rotation block, and the rotating seat is provided with a limiting mechanism for limiting displacement of the anti-rotation block.
2. The ladle turret hydraulic cylinder anti-rotation device according to claim 1, characterized in that, The limiting mechanism is composed of a limiting section of an upper section and a connecting section of a lower section, the limiting section is provided with a limiting groove corresponding to the anti-rotation block in the direction of the lifting hydraulic cylinder barrel, and the connecting section is fixed on the rotating seat.
3. The ladle turret hydraulic cylinder anti-rotation device according to claim 2, characterized in that, The anti-rotation block is cylindrical or square, and the limiting groove is also cylindrical or square.
4. The ladle turret hydraulic cylinder anti-rotation device according to claim 1 or 2, characterized in that, The outer periphery of the anti-rotation block is covered with an elastic material layer.
5. The ladle turret hydraulic cylinder anti-rotation device of claim 2, wherein, The lower end of the connecting section is connected with a base, and the base is detachably fixed on the rotating seat through bolts.
6. The ladle turret hydraulic cylinder anti-rotation device of claim 5, wherein, The base is provided with a waist-shaped hole, and the bolts pass through the waist-shaped hole on the base and are connected with the rotating seat.