SU956947A1 - Sintering and calcining machine vacuum chamber end sealing - Google Patents

Description

The invention relates to the agglomeration of metallurgical raw materials and can be used in ferrous and non-ferrous metallurgy.

. , For high-performance work of the sintering machine, it is important to reduce the so-called detrimental drips, which do not take any part in the sintering process. The main amount. air leakage comes through leaks in the head and tail parts of the sintering tire.

At present, there are no sufficiently reliable mechanical seals for devices that provide stable exclusion of air leaks in the first and last vacuum chambers.

The mechanical seals of the sintering machine are made in the form of fixed plates with a smooth surface, where the sealing of the vacuum chambers. This is accomplished by setting the minimum possible gap between the stove and the tipping trolley 1.

The main disadvantage of compaction is the presence of a guaranteed gap between the sintering carriage and the sealing plate, into which fine agglomerate falls, which causes increased wear of the plate.

The rapid increase in the gap due to the wear of the plate, in turn, causes a sharp increase in air slopes.

It is known to seal the ends of conveyor machines, made in the form of torsions, which makes it possible to bring the broken line formed by the surfaces of the sealing elements to the curvature of the body

The main disadvantage is the presence of additional gaps between the sections and the technical difficulty of their elimination. Due to the presence of a wedge-shaped gap between the sections, changes in the angle of inclination of the contact plane of the sections as they move along the radius, and lack of contact with the sealing element of the vacuum chamber of the end face

20 of each section, as well as due to the displacement of the latter along the radius, is less reliable than the Sortic seals, with sections moving vertically in a vertical plane.

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Claims (3)

The closest to the invention to the technical essence and the achieved result is the mechanical seal of the agglomeration machine, which contains a movable tray with two contact plates, one of which contacts the bottom of the grate car, the sealing plate of the vacuum chamber and the force mechanism HZ 3. However, the tray under the action of the counterweight, it can move along the curve, with its horizontal surface moving vertically and pressing to the bottom of the sintering stream, and vertically horizontal to side from the wedge. The gap between the vertical wall of the tray increases and the metal cylinder should go down, but since the sinter dust is stuffed under it, it remains in place, a gap appears between it and the vertical wall of the tray, resulting in an increase. Harmful gas outflows. In addition, the tray is pivotally connected to the uprights, which themselves are rigidly connected to the frame with the help of nuts, which generally prevents the tray from moving without first unscrewing the nuts. Hence it is clear that the pressing of the tray to the lower shelves of the sintering cart can be carried out only periodically. There is no constant preloading of the tray to the sintering carts, and this does not allow for sufficiently reliable sealing of the vacuum chamber. The aim of the invention is to reduce additional air suction. This goal is achieved by the fact that in the mechanical seal a tray containing two sealing surfaces located at an angle of 25-90 ° relative to each other and forming a wedge, pointing at the direction of the movement of the pallet, mechanism so that the tray has the ability to move in the horizontal plane relative to the latter. Making the connection of the power mechanism (spring, lever with counterweight, etc.) with the tray with the possibility of moving the tray relative to the force mechanism in the horizontal plane allows the movement of the pallet to be used to seal the vacuum gauge. The wedge formed by the two sealing surfaces of the tray allows for a more dense pressing of the tray to the sealing surfaces of the lower shelves of the pallet against the wall of the vacuum chamber. In order not to jam the tray when moving the pallet, the minimum wedge angle must be greater than 2 / x, where is the coefficient of friction. An increase in the angle of more than 90 ° causes the occurrence of a force that prevents the tray from setting foot to the lower shelves of the pallet. Figure 1 shows the proposed mechanical seal of the vacuum chambers when installing it in the head part of the machine; figure 2 - the same, when installed in the tail section. The proposed mechanical seal consists of a movable chute 1 with two sealing plates 2 and 3 and a longitudinal groove 4, a sealing plate 5 fixed on the vacuum chamber b, springs 7 mounted on the frame 8 and connected to the axis 9. Pursed by The springs 7 by the sealing plate 2 to the lower shelves of the pallet 10, the tray 1, due to the forces of friction, tend to move with the pallet. Due to the fact that tray 1 has the possibility of such movement (the presence of an axis 9 located in the groove 4), the sealing plate 3 is pressed against the plate 5 of the vacuum chamber 6 and the tray is wedged between the pallet and the vacuum chamber. In order for tray 1 not to be torn from its place during the reverse movement of the pallet 10, a stop 11 is provided on it. The possibility of using the movement of the pallet to seal vacuum chambers eliminates the appearance of cracks due to ingress of agglomerate spillage provides a tighter junction of the contacting surfaces. The proposed mechanical seal is reliable in operation and reduces harmful air inflows by approximately 30%. It can be applied to intercameral partitions. The invention The mechanical seal of the vacuum chambers of the kiln and sintering machines, contains a movable tray with two sealing plates, one of which is in contact with the bottom of the grate trolley, the sealing plate of the vacuum chamber and the force mechanism, with tons of oil, and moreover, with in order to reduce air inflow, the contact surfaces of the plates of the movable tray are interconnected at an angle of 25-90 ° and form a wedge directed toward the discharge side, and the connection of the force mechanism with the tray is adapted to move The latter is relative to the force mechanism in the horizontal plane. Sources of information taken into account in the examination 1. I. Nescheret Mechanical equipment of sinter plants. M., 1961, p.55. 2. USSR author's certificate number 783.549, cl. F 27 B 21/00, 1978. 3. USSR author's certificate number 269944, cl. F 27 B 21/00, 1968.