CN210765438U

CN210765438U - Stable high-strength hearth roll structure

Info

Publication number: CN210765438U
Application number: CN201921578931.4U
Authority: CN
Inventors: 沈炳辉; 贲启轩
Original assignee: Jiangsu Yatai Special Cast Steel Factory Co ltd
Current assignee: Jiangsu Yatai Special Cast Steel Factory Co ltd
Priority date: 2019-09-23
Filing date: 2019-09-23
Publication date: 2020-06-16
Anticipated expiration: 2029-09-23

Abstract

The utility model discloses a steady high strength hearth roll structure relates to annealing stove field. The utility model comprises a roller sleeve and a roller core inserted on the roller sleeve; the roller core comprises a roller and a shaft head; an assembling shaft is inserted in the shaft head along the axial direction; one end of the assembling shaft is provided with a positioning block with a cavity structure; the positioning block is arranged in the roller; the side wall of the positioning block is provided with a nut corresponding to the position of the sliding connecting pin; the screw nut is provided with a screw rod which is matched with the screw nut; one end of the screw rod is connected with one end of the sliding connecting pin; the nut is provided with a first bevel gear; the first bevel gear is arranged inside the positioning block; a core rod is inserted in the assembling shaft along the axial direction; one end of the core rod penetrates and extends into the positioning block and is provided with a second bevel gear meshed with the first bevel gear. The utility model discloses not only structural design is simple reasonable, the installation is convenient, can labour saving and time saving change the roller shell fast moreover, and the practicality is stronger, has higher market using value.

Description

Stable high-strength hearth roll structure

Technical Field

The utility model belongs to annealing stove field especially relates to a steady high strength bottom roller structure.

Background

The hearth roll is mainly used in a continuous annealing furnace for producing silicon steel sheets and consists of a roll sleeve and a roll core. The roller sleeve is made of non-metallic materials such as graphite and ceramic which are suitable for the furnace atmosphere, and generally does not have scratch influence on the surface of the strip steel. At present, the connection of the graphite carbon sleeve and the roller core still adopts pin connection, and the pin connection mainly has two modes: the first is a disc pin connecting structure, and the second is a rectangular pin connecting structure. The disadvantages of the disc pin coupling structure are: the mounting and dismounting are inconvenient, spot welding is needed between the bolt and the nut during mounting, oxygen cutting or breaking is needed during dismounting, and a large amount of spare parts are consumed; the matching surfaces of the disc pins and the roller cores are seriously abraded, a large number of roller cores are repaired by repair welding each time of fixed repair, and the roller cores are broken; the carbon sleeve and the roller core are not fixed in the axial direction, the thermal elongation of the roller core shaft is much larger than that of the carbon sleeve, the axial clearance between the carbon sleeve and the roller core shaft is increased, impact is easy to generate, and the operation of the strip steel is unstable. The rectangular pin connecting structure has the advantages that no mechanical fault exists in the operation, and the roller sleeve and the roller core are fixed in the axial direction; the defects are that the installation and the disassembly are inconvenient, particularly, the bolt is easy to twist off due to the fact that the thread is seized when the disassembly is carried out, and the screw must be taken by a special tool when the repair is carried out, so that a plurality of repair time is delayed. Both of these two coupling modes share a common feature: namely, the threaded connection is adopted in a high-temperature area. The furnace bottom roller runs for a long time in a high-temperature and oxidation environment, and the following problems are caused by the threaded connection: 1) the bolt and the nut are easy to loosen and fall off, spot welding is needed during installation, and parts are needed to be damaged during disassembly; 2) because the surface of the screw thread is oxidized to form iron oxide scales, the iron oxide scales are stressed and broken into fragments to block the screw thread gap when the screw is screwed, so that the screw thread is seized, and a special tool is required to be used when the screw is taken; 3) the screw thread is connected at the position in the furnace of the furnace bottom roller, and the assembly work of the roller sleeve and the roller core must be finished off-line outside the furnace, so that the roller changing process has the disadvantages of large overhauling workload, long overhauling time, high labor intensity of maintenance workers, dangerous thermal state replacement and high energy medium consumption. Therefore, it is desired to develop a smooth and high-strength hearth roll structure in order to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a steady high strength bottom roller structure, through utilizing bevel gear mechanism to realize the rapid Assembly to the bottom roller, not only structural design is simple reasonable, the assembly is convenient, can labour saving and time saving change the roller shell fast moreover, has also improved the structural strength and the motion steadiness of bottom roller simultaneously, and the practicality is stronger, has solved the problem that proposes among the above-mentioned background art.

In order to solve the technical problem, the utility model discloses a realize through following technical scheme:

the utility model relates to a stable high-strength furnace bottom roller structure, which comprises a roller sleeve and a roller core inserted on the roller sleeve; the outer wall of the roller sleeve is radially provided with an inner hole; the roller core comprises a roller and a shaft head; the outer wall of the roller is radially provided with pin holes corresponding to the inner holes; the pin hole is communicated with the inner hole; a sliding connecting pin is inserted in the pin hole; an assembling shaft is inserted into the shaft head in the axial direction; one end of the assembling shaft is provided with a positioning block with a cavity structure; the positioning block is arranged in the roller; the side wall of the positioning block is provided with a nut corresponding to the position of the sliding connecting pin; the screw nut is provided with a matched screw rod; one end of the screw rod is connected with one end of the sliding connecting pin; a first bevel gear is arranged on the nut; the first bevel gear is arranged inside the positioning block; a core rod is inserted into the assembly shaft along the axial direction; one end of the core rod penetrates and extends into the positioning block and is provided with a second bevel gear meshed with the first bevel gear.

Furthermore, a guide key is inserted on the outer wall of the shaft head along the radial direction; and a key groove matched with the guide key is formed in the outer wall of the assembling shaft along the axial direction.

Furthermore, a fit clearance is arranged at one end part of the shaft head and the assembly shaft, which have the same direction; a shaft sleeve is arranged in the fit clearance; the shaft sleeve is sleeved on the assembling shaft.

Further, the shaft sleeve is connected to the shaft head through a bolt; the shaft heads are connected to the shaft sleeves through bolts.

Furthermore, the other end of the assembling shaft is provided with an installation hole along the axial direction; a spring is arranged in the mounting hole; the spring is sleeved on the core rod.

The utility model discloses following beneficial effect has:

the utility model discloses an utilize bevel gear mechanism to realize the rapid Assembly to the bottom of a furnace roller, not only structural design is simple reasonable, the assembly is convenient, can labour saving and time saving change the roller shell fast moreover, has also improved the structural strength and the motion smoothness of bottom of a furnace roller simultaneously, and the practicality is stronger, has higher market using value.

Of course, it is not necessary for any particular product to achieve all of the above-described advantages at the same time.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural view of the stable high-strength hearth roll structure of the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1-roller sleeve, 2-roller, 3-shaft head, 4-sliding connecting pin, 5-assembly shaft, 6-positioning block, 7-nut, 8-screw rod, 9-first bevel gear, 10-core rod, 11-second bevel gear, 12-guide key, 13-shaft sleeve and 14-spring.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1, the utility model relates to a stable high-strength hearth roll structure, which comprises a roll sleeve 1 and a roll core inserted on the roll sleeve 1; the outer wall of the roller sleeve 1 is radially provided with an inner hole; the roller core comprises a roller 2 and a shaft head 3; the outer wall of the roller 2 is radially provided with pin holes corresponding to the inner holes; the pin hole is communicated with the inner hole; a sliding connecting pin 4 is inserted in the pin hole;

an assembling shaft 5 is inserted into the shaft head 3 along the axial direction; one end of the assembling shaft 5 is provided with a positioning block 6 with a cavity structure; the positioning block 6 is arranged in the roller 2; the side wall of the positioning block 6 is provided with a screw 7 corresponding to the position of the sliding connecting pin 4; the screw nut 7 is provided with a screw rod 8 which is matched with the screw nut; one end of the screw rod 8 is connected with one end of the sliding connecting pin 4;

the screw nut 7 is provided with a first bevel gear 9; the first bevel gear 9 is arranged inside the positioning block 6; a core rod 10 is inserted in the assembling shaft 5 along the axial direction; one end of the core bar 10 extends through the positioning block 6 and is provided with a second bevel gear 11 engaged with the first bevel gear 9.

Wherein, the outer wall of the shaft head 3 is inserted with a guide key 12 along the radial direction; the outer wall of the assembling shaft 5 is provided with a key groove matched with the guide key 12 along the axial direction.

Wherein, a fit clearance is arranged at one end part of the shaft head 3 and the fitting shaft 5 which face the same direction; a shaft sleeve 13 is arranged in the fit clearance; the shaft sleeve 13 is sleeved on the assembling shaft 5; the shaft sleeve 13 is connected to the shaft head 3 through a bolt; the stub shaft 3 is bolted to the sleeve 13.

Wherein, the other end of the assembling shaft 5 is provided with an installation hole along the axial direction; a spring 14 is arranged in the mounting hole; the spring 14 is sleeved on the core rod 10.

The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A steady high-strength furnace bottom roller structure comprises a roller sleeve (1) and a roller core inserted on the roller sleeve (1); the outer wall of the roller sleeve (1) is provided with an inner hole along the radial direction; the roller core comprises a roller (2) and a shaft head (3); the outer wall of the roller (2) is provided with pin holes corresponding to the inner holes along the radial direction; the pin hole is communicated with the inner hole; a sliding connecting pin (4) is inserted in the pin hole; the method is characterized in that:

an assembling shaft (5) is inserted in the shaft head (3) along the axial direction; one end of the assembling shaft (5) is provided with a positioning block (6) with a cavity structure; the positioning block (6) is arranged in the roller (2); the side wall of the positioning block (6) is provided with a nut (7) corresponding to the sliding connecting pin (4); the screw nut (7) is provided with a screw rod (8) which is matched with the screw nut; one end of the screw rod (8) is connected with one end of the sliding connecting pin (4);

a first bevel gear (9) is arranged on the nut (7); the first bevel gear (9) is arranged inside the positioning block (6); a core rod (10) is inserted in the assembly shaft (5) along the axial direction; one end of the core rod (10) penetrates and extends into the positioning block (6) and is provided with a second bevel gear (11) meshed with the first bevel gear (9).

2. The structure of the smooth and strong hearth roll according to claim 1, characterized in that the outer wall of the shaft head (3) is inserted with a guide key (12) along the radial direction; and a key groove matched with the guide key (12) is formed in the outer wall of the assembling shaft (5) along the axial direction.

3. The structure of the smooth and strong hearth roll according to claim 1, wherein a fitting clearance is provided at one end of the shaft head (3) facing the same direction as the fitting shaft (5); a shaft sleeve (13) is arranged in the fit clearance; the shaft sleeve (13) is sleeved on the assembling shaft (5).

4. The smooth high strength hearth roll structure according to claim 3, wherein said bushing (13) is bolted to said shaft head (3); the shaft head (3) is connected to the shaft sleeve (13) through a bolt.

5. The smooth and high-strength hearth roll structure according to claim 1, wherein the other end of the fitting shaft (5) is axially provided with a mounting hole; a spring (14) is arranged in the mounting hole; the spring (14) is sleeved on the core rod (10).