CN210614731U

CN210614731U - Roller type steel rail pre-bend

Info

Publication number: CN210614731U
Application number: CN201921430152.XU
Authority: CN
Inventors: 陈元福
Original assignee: Pangang Group Panzhihua Steel and Vanadium Co Ltd
Current assignee: Pangang Group Panzhihua Steel and Vanadium Co Ltd
Priority date: 2019-08-30
Filing date: 2019-08-30
Publication date: 2020-05-26
Anticipated expiration: 2029-08-30

Abstract

The utility model discloses a roller type rail is elbow in advance relates to the rolling field of rail, solves current rail in advance elbow be used for with rail bottom direct contact's spherical surface between relative friction, cause the problem that scratch defect appears at the bottom of the rail. The utility model adopts the technical proposal that: roller type rail is elbow in advance, including railhead support piece, one side of railhead support piece sets up two supports, installs the pivot between two supports, and the gyro wheel is worn outward to establish in the pivot, and the outside of gyro wheel is the power of application face of preflex, forms the rail end holding tank between gyro wheel and the railhead support piece. The roller type steel rail pre-bending head applies pre-bending force by utilizing the contact of the roller and the bottom of the steel rail, and the friction mode of the steel rail and the bottom surface of the heavy rail is changed into a rolling friction mode in the falling process, so that the problem of surface defects caused by the fact that the roller scratches the bottom of the steel rail is avoided. The roller type steel rail pre-bending line has a simple structure, is easy to disassemble and replace, and can be widely applied to the scenes and positions of various steel rolling enterprises similar to the application of the cold bed inlet pre-bending line.

Description

Roller type steel rail pre-bend

Technical Field

The utility model relates to a rolling field of rail specifically is a roller type rail is elbow in advance.

Background

The existing steel rail pre-bending head is integrally cast and processed, the pre-bending head comprises a pre-bending force application part which is used for contacting with the rail bottom of a steel rail and a rail head supporting part which is contacted with the rail head of the steel rail, the pre-bending force application part and the rail head supporting part are integrated, and the side surface of the pre-bending force application part, which is close to the rail head supporting part, is a spherical surface which is directly contacted with the rail bottom of the steel rail. For example, patent publication No. CN201257464Y discloses a new heavy rail pre-bend having the above structure.

When the steel rail is pre-bent, firstly, the pre-bent head is opened a certain distance from the original position to align the steel rail, namely, the steel position is arranged, so that the whole steel rail is ensured to be at the correct position on the pre-bent head. And secondly, the pre-bent head rises to lift the steel rail, and the rail head supporting part of the pre-bent head is firstly contacted with the side surface of the rail head of the steel rail and lifts the steel rail to be flat, so that the local stress deformation of the bottom of the heavy rail is avoided. And thirdly, each pre-bending head moves to the cooling bed according to the pre-bending amount set by each pre-bending head, the spherical surface of each pre-bending head is contacted with the bottom surface of the steel rail and generates a certain pre-bending force to pre-bend the steel rail, and the aim of pre-bending the whole steel rail is fulfilled. And finally, the pre-bending head descends to enable the steel rail to be placed on the static beam of the cooling bed and pre-bending is completed. During the descending process of the pre-bending head, the rail bottom of the steel rail is firstly contacted with the static beam of the cooling bed, the bottom surface of the steel rail inclines to one side of the rail head from a vertical state, so that the lower part of the rail bottom is more closely contacted with the lower part of the spherical surface of the pre-bending head, and during the process that the pre-bending head continuously descends to be completely lower than the surface of the working roll, the spherical surface of the pre-bending head generates friction with the lower part of the bottom surface of the steel rail, and the pre-bending head scrapes the bottom surface of the steel rail to generate the scratch defect of. The scratch defect of the bottom surface of the steel rail affects the surface quality, and generally only can be subjected to grinding treatment, namely, a grinding wheel is used for grinding the position of the steel, and grease is applied to reduce friction after the steel is ground smoothly, so that the problems of poor effect and serious influence on the production rhythm exist.

SUMMERY OF THE UTILITY MODEL

The utility model provides a roller type rail is elbow in advance solves current rail in advance elbow be used for with rail bottom direct contact's spherical surface between relative friction, cause the problem that scratch defect appears at the bottom of the rail.

The utility model provides a technical scheme that its technical problem adopted is: roller type rail is elbow in advance, including railhead support piece, one side of railhead support piece sets up two supports, installs the pivot between two supports, and the gyro wheel is worn outward to establish in the pivot, and the outside of gyro wheel is the power of application face of preflex, forms the rail end holding tank between gyro wheel and the railhead support piece.

Further, the method comprises the following steps: the outer side of the pre-bending force application roller is spherical, and the pre-bending force application surface is a spherical surface.

Further, the method comprises the following steps: and a bearing is arranged between the roller and the rotating shaft and/or a bearing is arranged between the support and the rotating shaft. Specifically, the method comprises the following steps: the bearing is a graphite bearing.

Further, the method comprises the following steps: and a locking structure for preventing the rotating shaft from being separated from the support is arranged between the support and the rotating shaft.

Specifically, the method comprises the following steps: the locking structure is as follows: the upside of support sets up the pivot mounting groove, and the pivot is installed in the pivot mounting groove, and the upside of pivot mounting groove sets up the gland, and the gland passes through the upside of bolt fastening in support.

The utility model has the advantages that: the roller type steel rail pre-bending head applies pre-bending force by utilizing the contact of a roller and the bottom of a steel rail, and the friction mode of the steel rail and the bottom surface of a heavy rail is changed into a rolling friction mode in the falling process; meanwhile, a certain assembly gap is inevitably formed between the roller and the support, so that the contact force between the roller and the rail bottom of the steel rail can be buffered to a certain extent, and the friction force can be reduced; therefore, the problem of surface defects caused by scraping of the rail bottom by the rollers is solved. The roller type steel rail pre-bending head has simple structure and easy replacement.

And a bearing is also arranged between the roller and the rotating shaft and/or a bearing is arranged between the support and the rotating shaft, so that the rotation of the roller is facilitated. The graphite bearing is selected as the bearing, and the bearing can adapt to a high-temperature working environment.

Drawings

Fig. 1 is a schematic structural view of the roller type steel rail pre-bend of the present invention.

3 fig. 3 2 3 is 3 a 3 sectional 3 view 3 taken 3 along 3 line 3 a 3- 3 a 3 in 3 fig. 3 1 3. 3

Parts, positions and numbers in the drawings: railhead support piece 1, support 2, pivot 3, gyro wheel 4, rail end holding tank 5, bearing 6, gland 7, rail 8.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

As shown in fig. 1 and 2, the roller type pre-bent head of the present invention includes a head support 1, and an upper side of the head support 1 forms a top surface for supporting a rail 8.

Two supports 2 are arranged on one side of the railhead supporting piece 1, namely two supports 2 are arranged on the left side of the figure 1, a rotating shaft 3 is arranged between the two supports 2, a roller 4 penetrates through the rotating shaft 3, and the roller 4 can rotate relative to the rotating shaft or the supports 2. In order to facilitate the rotation of the roller 4, "a bearing is provided between the roller 4 and the rotating shaft 3" and/or "a bearing is provided between the support 2 and the rotating shaft 3". Specifically, a bearing can be arranged between the rotating shaft 3 and the support 2, and the roller 4 is fixedly connected with the rotating shaft 3; or, the rotating shaft 3 and the support 2 are fixedly installed, and the bearing 6 is arranged between the roller 4 and the rotating shaft 3, as shown in fig. 2; or, a bearing is arranged between the support 2 and the rotating shaft 3, and a bearing is also arranged between the roller 4 and the rotating shaft 3. The bearing is preferably a graphite bearing to adapt to the high-temperature working environment.

The surface on which the roller 4 rotates is a vertical surface, and the vertical surface intersects the top surface of the railhead support 1. The outer side of the roller 4 is a pre-bending force application surface, and a rail bottom accommodating groove 5 is formed between the roller 4 and the rail head supporting piece 1. The outer side of the pre-bending force application roller 4 is spherical, and the pre-bending force application surface is a spherical surface, so that the roller 4 forms a pre-bending force application surface which is consistent with the spherical surface of the existing pre-bending head contacted with the rail bottom of the steel rail. The difference in height of the axis of rotation of the roller 4 from the bottom of the foot-receiving groove 5 is preferably half the width of the foot of the rail 8 to which it is fitted, facilitating the application of the pre-bending force by the roller 4 to the foot-centred position of the rail 8.

The rotating shaft 3 is fixedly arranged on the support 2, and a locking structure for preventing the rotating shaft 3 from being separated from the support 2 is further arranged between the support 2 and the rotating shaft 3. For example, a nut is provided at the end of the support 2, or the locking structure is: the upside of support 2 sets up the pivot mounting groove, and pivot 3 is installed in the pivot mounting groove, and the upside of 3 mounting grooves of pivot sets up gland 7, and gland 7 passes through the upside of bolt fastening in support 2. The radius of the shaft 3 in the axial direction is varied to avoid play between the bearings 2.

The roller type steel rail pre-bending head applies pre-bending force by utilizing the contact of the roller 4 and the bottom of the steel rail 8, and the friction mode of the roller 4 and the bottom surface of the heavy rail is rolling friction in the falling process of the steel rail 8, so that the surface defect caused by scratching the rail bottom of the steel rail 8 can be avoided. And certain assembly gaps are inevitably reserved between the support 2 and the rotating shaft 3 and between the rotating shaft 3 and the roller 4, and the gaps can buffer the contact force between the roller 4 and the rail bottom of the steel rail 8 to a certain extent, so that the friction force is reduced, the roller 4 is further prevented from scratching the rail bottom of the steel rail 8, and the rail bottom of the steel rail 8 is further prevented from being scratched transversely. The roller type steel rail pre-bending head can be widely applied to the scenes and positions of steel rolling enterprises similar to the application of the cold bed inlet pre-bending line.

Claims

1. Roller type rail is elbow in advance, including railhead support piece (1), its characterized in that: one side of railhead support piece (1) sets up two supports (2), installs pivot (3) between two supports (2), and pivot (3) are worn outward and are established gyro wheel (4), and the outside of gyro wheel (4) is the preflex application of force face, forms rail end holding tank (5) between gyro wheel (4) and railhead support piece (1).

2. The roller track pre-bend according to claim 1, wherein: the outer side of the pre-bending force application roller (4) is spherical, and the pre-bending force application surface is a spherical surface.

3. The roller track pre-bend according to claim 1, wherein: a bearing (6) is also arranged between the roller (4) and the rotating shaft (3) and/or a bearing is arranged between the support (2) and the rotating shaft (3).

4. The roller track pre-bend according to claim 3, wherein: the bearing (6) is a graphite bearing.

5. The roller type rail pre-bend according to any one of claims 1 to 4, wherein: and a locking structure for preventing the rotating shaft (3) from being separated from the support (2) is arranged between the support (2) and the rotating shaft (3).

6. The roller track pre-bend according to claim 5, wherein: the locking structure is as follows: the upside of support (2) sets up the pivot mounting groove, and pivot (3) are installed in the pivot mounting groove, and the upside of pivot mounting groove sets up gland (7), and gland (7) are fixed in the upside of support (2) through the bolt.