SU1760998A3 - Roller hearth furnace - Google Patents

Abstract

SUMMARY OF THE INVENTION: In a roller-hearth furnace, it is provided that a roller base is assembled from structural elements of a roller table, which are assembled from several rollers with very small diameters and from two support beams on which the ends of the rollers are supported. Due to this design, the support of the rollers is independent of the side walls, because the rollers are perceived as separate bearing beams which, together with the rollers, form structural units in the form of modules for IGMEELS-NL roller bases. 11 hp f-ly 17 ml.

Description

This invention relates to the field of metallurgy, in particular, to roller-hearth furnaces.

The purpose of the invention is to simplify the replacement of rollers, with the possibility of reducing the distance between them.

Figure 1 presents a schematic longitudinal section of a roller-hearth furnace; figure 2 - section aa in figure 1 (hearth along the line); on fig.Z - section bb in fig, 2; figure 4 is an enlarged image of the element of the roller table, seen from figure 2, top view; figure 5 - section bb In figure 4; figure 6 is a view of G in figure 4 (from the end); figure 7 is an enlarged image of the section through the right end of the support of the structural element of the roller table in accordance with figure 4 and 5; on Fig - section dD in figure 7; figure 9 schematically shows an enlarged longitudinal section of the furnace (figure 1); Fig. 10 is a longitudinal section of the furnace, an embodiment; figure 11 - section EE of figure 10; Fig. 12 is a section through ZHZ in Fig. 11; on Fig

- a top view of an embedded metal frame into which the structural elements of the roller table are slid; in fig. 14- section 3-3 in FIG. 13; in FIG. 5; FIG. 13; in fig. 16 is an enlarged view of the end part of the roller table element that slides into the built-in frame (Fig. 13); FIG. 17 schematically - section K-K in FIG. sixteen.

Figures 1 and 3 show a roller hearth furnace, which has a body 1 of refractory and heat insulating materials, made of an upper part 2 of the case and a lower part 3 of the case. As can be seen from FIG. 3, the lower part 3 of the case is smaller than the upper part 2. In the case 1, heating devices 4 are placed.

The roller base 5 is made of several (in the example shown, made of. Five) structural elements that are located one behind the other, with one fit to another in the same plane. Constructive elements of roller

Yu

00

with

The side table is fixed on the sides in the recesses 6 of the walls 7 of the housing.

Each of the structural elements of the roller table 8, as shown in Figs. 4 and 5, is formed from rollers 9 made in the form of pipes, which are fixed with their ends in the supporting beams 10 so as to rotate. The bearing pins 11 are inserted into the free ends of the rollers 9 from the ends and are supported in the sleeves 12 inside the support beams 10 for rotation. The support beams 10 are fixed with the supports 13 by means of the fixing pin 14 in the middle of the ribs. The supports 10 simultaneously serve as a heat shield and provide stability against wear of the input end of the roller. Since they must be made of wear-resistant material, it is advisable that they do not correspond to the length of the support beams along the entire length, and the two supports 13 correspond to one support beam 10. A shorter length allows them to be made of materials with high refractory properties, for example SiC.

Each of the supports 13 and each of the support beams 10 have as many holes as the rollers are located in the unit of construction of the roller table. Insulating fitting elements 15 are inserted between the support beams and the supports in order to create a good thermal insulation of the internal space of the furnace from the external environment. These insulating fittings 15 are made from two half pieces.

In the embodiments (Figures 4 and 5), a common drive system 16 is attached to one of the two support beams 10, with which each of the support pins 11 is set in motion. The gear wheels 27 rotate each of the support axles 11. All gear wheels 17 are kinematically connected so that all the support pins 11 receive the same direction of rotation. The gear wheels 17 are driven by a common drive pin 18 from the drive motor 19, which is arranged correspondingly to each structural element of the roller table.

In the embodiment shown in FIGS. 1-3, for each of the structural elements of the roller table, an opening 20 is provided in the housing walls, by which each of the roller elements is pulled out in the direction of the transport direction for replacement if necessary. For these purposes, the openings 20 are fitted in their width and height to the dimensions of the support beams 10 and overlapped with lids 21 to hold the drive system 16 and the support beams 10. Between the openings 21 there are wide openings 22 that ensure the strength of the furnace structure. Carrier 23 is a support for the upper part of the body relative to the lower part of the body. Fastening bolts 24, which extend downward from the upper part of the body, are used to remove the insulation of the support beams and the supports, if it is desired to disassemble the corresponding elements of the roller table.

The invention makes it possible to position the rollers one against the other at a minimum distance, as well as to implement a variant with a very small diameter of the rollers, which, with a small distance between the rollers, makes it possible to transport processed parts of small size. In this case, the distance between the rollers is chosen significantly smaller than the diameter of the rollers. How to implement the location of the rollers 2 in the supports separately, as shown in Fig.7 and 8.

In accordance with Fig. 9, a nozzle 25 is introduced into the space inside the roller base, supplying gas. Partitions 26 are placed under the roller base, due to which, when the gas is supplied to the nozzle, gas is circulated in the direction of arrow 27 to create a uniform furnace atmosphere, so that small details can pass as much as possible under the passage of the heat treatment space.

FIGS. 10-12 show an embodiment in which a mixture of structural elements of a roller table arranged one after the other is provided, which in principle are constructed in the same way as shown in FIGS. 5-6. The difference is that what is shown is not a furnace for heating and sintering with a cooling section in which all the structural elements of the roller table are equipped with separate drives for the rollers. The drive is carried out here by means of a common, extending in the region of the side walls of the casing of the chain 29, which engages with the respective gear wheels of each of the individual bearing pins 11.

FIG. Figure 13 shows an integrated frame made of a metal profile that is mounted in a heat insulated housing. The built-in frame 30 on both longitudinal sides has two longitudinal bars 31, parallel to each other, which are interconnected with transverse bridges 32 or 33 perpendicular to them. Both longitudinal bars 31 are connected in frame with

using the transverse bars 34. As can be seen from FIG. 13, in each case two adjacent transverse bridges 32 are located relative to each other at a certain distance A, the adjacent jumper has a smaller distance B relative to it, on the opposite side the distribution of these distances A and In the opposite. This allows the built-in frame 30 to install plug-in drawers that correspond to the grooves and could slide in as drawers, i.e. neighboring structural elements of the roller tol are in each case introduced from different longitudinal sides of the integrated rema. Distance A is selected for this purpose so that it is larger than the width C of the structural element of the roller table. The distance B, on the contrary, will be less than this width, so that when the structural element of the roller table is pushed in between the two transverse bridges located at the distance A, both opposite transverse bridges serve as stops.

Each of the structural elements of the roller table (see Figs. 16 and 17), on the retracting side, is provided with a support beam 10. The support beams 10 are part of the box 35, which is closed with a cover 36 in front. The supports 37 and 38 are placed on both sides of the box cover. for tensioning wheels 39 and 40 of the drive chain driving the axles of all the rollers. Tensioning wheel 40 is drive for chain 41 and connected to drive unit 43 of drive motor 44 by means of a drive shaft 42. The structural elements of the roller table can be fixed to the longitudinal bars x 31 with screws that are provided with holes 45 cover 46. The cover is provided with an outer flange 47, which closes the corresponding transverse bridges outside.

Each of the boxes 35 in the upper or lower part may be provided with cooling ribs 48. For cooling, the longitudinal and / or transverse bars can be made in the form of hollow profiles and pass cooling air from the blower through them.

Claims (12)

Claim 1. Roller hearth furnace, mainly for heat treatment, comprising a casing, a roller thermal insulation, made of fixed in the casing rollers for transporting the products to be processed, characterized in that, in order to simplify the replacement of the rollers with the possibility of reducing the distance between them, the roller roller is designed as modules, including several rollers, the ends of which are fixed in two support beams, while the modules are mounted alternately in openings in the opposite walls of the furnace with the possibility of dismantling. 2. Furnace according to claim 1, 1, so that the furnace is made with an integrated frame, and the prozma are made in this frame. 3. Bake pop-1, characterized in that the built-in frame is made of two bouesises parallel to each other, connected by cross bridges bounding openings. 4. Furnace according to claim 1, characterized in that two adjacent transverse bridges are installed with the possibility of using them as an abutment for installing modules. 5. Furnish according to claim 1, in accordance with the fact that it is provided with covers mounted on transverse bridges. 6. The furnace according to claim 1, characterized in that the beams of the built-in frame are part of the gearbox, where the drive of the rollers is located. 7.Pech according to claim 1, in connection with the fact that the longitudinal bars and transverse bridges are made in the form of hollow profiles for the cooling medium. 8. Feathers according to claim 1, wherein the supporting beam is provided with at least one insulating fitting piece displaced to the center of the roller. 9. Furnish according to claim 1, in connection with the fact that the rollers are made hollow and have bearing pins on the side of the butt. 10. Furnace according to claim 1, excluding the fact that the support beam and the support are connected by means of a fastening pin. 11. Oven according to claim 1, characterized in that it is provided with gas circulation devices located above and below the roller hearth. 12. Stove popp. 1 and 11, characterized in that the gas circulation device is designed as a spray pipe, on both sides of which partitions are placed. Priority points: 14.05.83 on PP.1.8-12: 04.04.89 on LP.2-7. 55 I / / I l "five  L , Pi / z4 one 3-fc with JV JV about WITH Ј4 well / ®uzfQ 29 Ј-Ј ITTTTTTT t well / / 0 ft TUЈT..T.T.T777YA V / sh Vi / eJf YY-7 € QЈ t SЈ ff 2pn $ 866092.1 46 jff / : illJl lll - || ll (Olllltliili. illMiiil -ii l :-) i; iinilr-illilr.- | illl: - lllllL-jlilil 48 TYPE Bill UifllllHH LI in i liBLi 1i im111 IHI i iTm squeaking vp iimiHim fnnjii iiihin pv ABOUT "/ 45 Jl OOP WL about lollHllo vxxchxxchchchchxhxx lY m 6u8 # J / & L / F RF Sh Jf x chchchchchchchchchchch l t 3