SU934170A1 - Heating furnace walking hearth - Google Patents

Description

The invention relates to the use of heating means, mainly to devices for moving heated bodies (metal, dielectric, etc.) in heating chambers, i.e., in the working space of the heating furnace. A known mechanism for walking the bottom ball in which the stationary under and movable beams with drives of vertical and horizontal movement have a lever-lock connected to the drive. Such a device provides an intermediate fixation of movable beams at the level of a stationary hearth prevents the products from bending under their load 1. A disadvantage of this device is the inability to simultaneously move products along horizontal and vertical planes. The closest to the technical essence and the achieved result to the proposed is a walking beam heating furnace for simultaneous horizontal and vertical movement of products made with a stepped profile 2. The disadvantages of the known device is, firstly, the need to have a complex drive mechanism for the implementation of the movement, and secondly, the movement is carried out only along a vertical and horizontal trajectory. The purpose of the invention is to simplify the drive mechanism and increase the reliability of operation. The goal is achieved by the fact that, under the heating furnace, containing movable beams and fixed supports, is provided with a tank with liquid installed under fixed supports, and the beam is hollow, with supporting rollers reinforced on the outside of the beam, and on the inside of the tank , coupled with rollers. The internal cavity of the beam and the tank are connected to pipelines with valves and a pump for pumping water. Fixed supports may be made of refractory material and not cooled. With water. If it is necessary to cool, the lugs have water-cooled channels with pressure and drain fittings connected by pipeline to the internal cavity of the bulk through the intermediate circulation pump for pumping water through the supports.

There are air gaps between the outer body of the balkn and the inner walls of the tank (tank) around the perimeter. Hydraulic seals are installed in the bottom of the tank (tank). In the bottom of the tank there are support rods for installing the walking beam during technical inspections and installation, and between the float body and the inner walls of the tank (shock tanks are installed, for example, from used automobile tires. The bottom part of the beam and adjacent to Its part of the tank (tank) along the entire perimeter relative to the vertical plane (axis of symmetry) are made along the bevels in the form of an undercut (under the slot). In the internal cavity of the beam, hydra are installed against the water intake holes dampers of specialized metal strips.

The device of the walking beam heating

The furnace is made on the principle close to the operation of 5 holes inside the cavity 4 of the float, install the hydroponton or dock, but in contrast to the depressors 14. When necessary, they have significant features. Cooling water bottom supports (mobile 15

the water area of the walking beam is limited by the size and fixed 16) for a given thermal pro

In the outer tank, which together (Fig. 2), they are autonomous by float, are in the initial state a two-chamber hydraulic cylinder with balanced pressures in the chambers. Hydroponton and dock have the possibility of autonomous ascent and flooding only in the vertical direction. For longitudinal or lateral movement, drives are used (mechanical towing, jet, etc.). In the proposed device, all movements of the beam are carried out only under the influence of the pressure drop of water in the outer cavity of the tank and the internal cavity of the float. Thus, in the proposed device JK, in the outer chamber (tank with water) and in the inner chamber, the cavity of the beam) the fluid pressures relative to the mirror of the baths are variable, while in hydroponton structures, the pressure in the outer chamber (water area, rivers ) constant (with respect to the pontoon), which excludes the identity of the hydrophysical operating conditions of the proposed and known devices. In addition, the imposing walking beam of the heating furnace meets the heat engineering requirements of removing solid metal from heated supports, while at the same time the inner cavity of the beam can be used as a superheater and water cooler for S5 linear, spiral-shaped and

fixed and movable hearth supports, the poet. d.) The value of the resulting schaga d

no additional bottom-up cooling systems are required or to the side and the magnitude

with inherent flaws. lifting h up (going down) is determined

FIG. 1 shows the SCCP of the walking beam of the heating furnace; in fig. 2 shows section A-A in FIG. one; in fig. 3 - cooling system of movable and fixed stops of the hearth of the heating furnace; in fig. 4 - cyclograms of the beam movement.

In the initial state, the tank 1 is filled with water to a certain level, its hydraulic locks 2 are closed, and the movable part of the bottom

3 due to the flooding of cavity 4, rest on the support rods 5. On the outer side in the bottom of the bottom 3, the support rollers 6 are reinforced, clamped in the guides 7. The floor of the bottom is connected to the tank 1 with pipelines 8, valves and valves 9 and circulation pipes pump 10.

Claims (2)

Between the bottom 3 and the water filled tank 1 there are gaps 11 around the perimeter of the tank, protected under the slot by heat-absorbing visors 2. Unstable as the bottom oscillates, Bbi3BaFmbie inaccurately fitting the contacting surfaces, damped by shock absorbers 13, for example, from elastic rubber. Against the inlet intake, self-cooled channels 17 and 18, control systems 19 with pipelines 21 and 20 ,. pressure fittings 22 and 23, drain fittings 24 and 25, circulation pumps 26 and 27, and a control system. The waste heat system can be associated with a plant-wide steam system for process needs. The control system and auxiliary equipment, including pumps, instrumentation and automation, if necessary, can be placed in an intermediate chamber 28 located between the working part of the bottom 3 and the float chamber 4. The device operates as follows. The heated cooking units 29 by the pusher 30 are loaded onto the fixed supports 16 of the bottom in the heating chamber 31. When you turn on the pump 10, pumping water from the cavity 4 into the tank 1, due to the difference in hydrodynamic pressures, the movable part of the bottom 3 will begin to float along a predetermined path along the guides. The envelope trajectory of the bottom movement, depending on the profile of the guides, can be different (from linear, vertical, diagonal - inclined, curvilinear to the total vector of resultant forces (lifting and supporting). In sequence, moving inside the heating chamber 31 along the set cycle, the workpiece 29 through An exit window 32 with a flap 33 falls along an inclined skid onto the receiving roller table (conveyor) 34 for further processing. To reduce the steam formation from the open surface of the water in the tank 1 and the ingress of water In the working chamber of the heating chamber 31 in the space between the inner wall of the tank and the outer wall of the float chamber, the chambers are arranged with waterproof elastic curtains or hollow metal balls 35. Contacting each other, they completely cover the water surface and, rotating, freely pass between the slime, scale and other wastes that go to the sediment at the bottom of the tank. After some time, determined by the technological cycle, the hydraulic traps 2 are opened, all the sludge is removed to the sludge pits 36 and as discharged into the sludge disposal system for further processing. The process of sludge removal can be uninterrupted in the intervals when the mobile bottom is in its original position on the support rods 5. The technical and economic effect proposed by the invention is manifested in the development of | Ke and the construction of heating means with walking beams, during operation and maintenance and fundamentally changes the structure of equipment, its placement and coordination with intrashop transport process flows. Designing a heating furnace with a walking beam float chamber is greatly simplified, due to the elimination of complex kinematic and hydraulic assemblies, the design time and cost are reduced. The proposed device requires significantly but less capital expenditures on construction and installation in comparison with the known furnaces. The power of the actuators (the only consumer of energy is a circulation transfer pump) in the proposed device is several times lower than in the known ones, where significant kinematic forces of engagement, friction, adhesion, and mass must be overcome. Reduced energy consumption (gas, electricity, water), lubricants, spare parts, refractories, etc. Simplified maintenance and operation, reduced cost of heating products, increases unit productivity. The device is easily integrated into a general technological flow with branched and displaced transport systems and equipment in spatial axes. The proposed system of movable goods (products) on the principle of MAG could be easily transformed into other transport cargo flows and devices. Claim 1. Going under the heating furnace, g. Containing movable beams and fixed supports, characterized in that, in order to simplify the drive mechanisms and increase the reliability of operation, it is equipped with ba-. a lump with liquid installed under the fixed supports, and the beam is hollow and installed in the tank, with support rollers fixed on the outer side of the beam, and C on the inner side of the tank - guides, which are in conjunction with the rollers. 2.Under p. 1, characterized in (in that the fixed supports have water-creeping channels with pressure and drain fittings connected to the internal cavity of the beam through the circulation pump and regulating valves. 3., Under clause 1, which distinguishes so that there are gaps between the beam and the inner walls of the tank. 4. An under plate of claim 1, characterized in that hydraulic locks are fitted in the bottom of the tank. 5. An under plate of claim 1, characterized in that between the beam and the inner Shock absorbers are installed on the walls of the tank. 6. Under the method of claim 1, characterized in that in the bottom part supporting rods. 7. Under under item 1, characterized in that the bottom outer part of the beam and the inner upper part of the tank along the entire perimeter relative to the axis of symmetry are made along bevels. 8. Under Pod 1, I distinguish u (and and with In order to absorb hydrodynamic stresses, profile metal plates are installed in the cavity of the beam. 9. Under Pod according to claim 1, characterized in that the space between the outer wall of the beam and the inner wall of the tank at the level of the liquid mirror is filled with moisture-wetted gaps. impermeable material with a specific gravity less than the specific gravity of the liquid. Sources of information taken into account in the examination 1. The author's certificate of the USSR N 403771, cl. F 27 B 9/30, 1971. 2. USSR author's certificate f ° 331102, cl. C 21 D 9/00, 1969. R "Vj J Vv “G1. f. I. i. I. 11. J / l-i-l t t I K ha. ..I G // g - ± r - ± 4 / - / rф (/ г.1