SU699268A1 - Gas-sealing valve of blast furnace charging unit - Google Patents

Description

(54) GAS ACCESSORIAL VALVE OF A DIFFERENT APPARATUS DEPARTMENT FURNACE

The invention relates to ferrous metallurgy and can be used in blast furnaces.

Known valves designed to seal the gas, comprising a housing, a locking plate arranged therein, in contact with the seat through a seal and hinged to the lever 1.

The closest to the invention to the technical essence and the achieved result is the valve of the charging device of the blast furnace, comprising a housing, a saddle, a drive plate connecting the hinged device with a lever, and the saddle is equipped with a movable spring loaded joint that interacts with the additional contact bracket 2 .

However, in such gas sealing valves with a hinge device made in the form of a ball bearing located in the plate, the valve is not tightly locked because there is no self-alignment of the valve on the saddle, as there is not sufficient removal of its center of swing over the center of gravity.

Moreover, the desire to increase this size leads to a number of undesirable consequences, such as: an increase in the mass of tarpes and the impossibility of making its cup-shaped upper surface that would protect the contact point when closing the valve, collecting material. The use of a cable drive, in which the plate is pressed against the seat by a counterweight, and the opening by the force of an electromechanical drive, does not tightly press them, since it is difficult to create a significant (at least twice) excess of the moment from the counterpart mass over the moments from the mass of the moving parts of the valve. Drainage of contacts and their quick exit, especially with an increase in the mass of counterloads, make the cable drive labor-intensive and short-lived in service.

The aim of the invention is to improve the tightness and service life of the valve.

Claims (2)

This is achieved in that in a gas sealing valve having a body, a saddle, a drive plate connected pivotally to the lever, and a process, the hinge connection is made in 369 form; a pair of spherical lenses with a common center of rotation located above the center of the tarsley link and the lever the plate is connected to the drive through the clutch torque limit. . FIG. 1, 2 shows the valve in two projects, general view; in fig. 3 - swivel device; in fig. 4 - valve, kinematic scheme. The valve has a saddle 1, a plate 2, a lever 3 of the cartridge, a sharng device 4 located between the plate and the lever of the body 5, the drive 6 of the torque limit clutch 7, and a lever system 8. The hinge device 4 includes a lens 9 fixed to the trunnion 10 plate 2 and resting on the lens 11 located in the outrigger of the lever. The lenses 9 and 11 of the contacts touch the spherical surface and form the first pair of contact lenses that transmit the pressing force. The lenses 12 and 13 form a second pair of spherical contact lenses, the radius of the sphere of which is described from one center with the first pair and serves to assemble the hinge device 4 into one kinematic closed node. The kinematic scheme of the valve contains an electric motor 14, a worm gear reducer 15 with a hollow output shaft 16, a torque limit clutch 7, a drive shaft 17, a crank 18, a connecting rod 19, a link 20, a valve shaft 21, a plate lever 3 and a plate 2. The valve works as follows . The initial position of the valve is open. The plate 2 and the plate lever 3 are in the vertical position A. Their rotation is carried out from the drive 6. The movement from the electric motor 14 through the worm gearbox 15 and its hollow shaft 16 is transmitted to the coupling 7 of the torque limit, adjusted so that the force of the plate mode 2 to sedau 1 provided reliable locking valve. The movement is then transmitted to the drive shaft 17 resting on the valve body 5, on one side of which is the actuator 6 (electric motor 14, a worm gearbox 15), and on the other - a crank 18 entering the lever system 8. From the crank 18 through the rod 19, adjustable in length, the motor is transmitted to the link 20, secured with a tongue on the valve shaft 21. Inside the box 5, the lever 3 of the plate is mounted on the same shaft, which is connected to the plate 2 by the hinge device. When the plate moves, it touches the seat 1 anywhere, since its position at the time of contact is indefinite. In that part of the plate, lenses 9 and 13, of the hinge device 4, rigidly mounted on dapf 10, are rotated relative to lenses I and 12, which are installed firmly in Fig. 3, the plate is aligned at the point of contact and pressed against the surface of the saddle. When the force is reached, the clutch 7 is adjusted to the limiting moment, the discs slip and the circuit is turned off by the electronic circuit breakers — the electric motor 14 is stopped. This is achieved by exceeding the center of the swing over the center of the sheet metal. This hinge device allows the swing center to be raised by any amount above its center of gravity, without affecting the configuration of the plate itself, i.e. makes it possible to carry out the plate, taking into account other factors affecting the contact density and valve performance For example, it is possible to make the upper surface of the plate bowl, which will eliminate the ingress of charge material to the point of contact when the valve is closed. In addition, such a hinge device will reduce the weight of the plate, which will reduce the dynamic loads in the valve parts and the time it closes. The unit is sealed with asbestos gasket, which protects it from dust and holds the heat-resistant lubricant (such as graphite) in rubbing pairs of the hinge device. The connection of the lever of the plate through the clutch of the limiting moment and the lever system allows to use the drive force to lock the valve, which provides a significant (three to four times) excess of the locking moment over the moment of opposing forces, such as: the mass of the plate, from the lever and the radial device. This supply of force creates favorable conditions for tightness of the valve. Combining the actuator with the clamp in one unit and using the force of the actuator for locking eliminates the system of counterweights and ropes, which makes it possible to make the valve assembly compact, more efficient and durable. Claims: Gas sealing valve of a blast furnace charging apparatus, comprising a housing, a seat, a drive plate connected hingedly to a lever, characterized in that, in order to increase its tightness and service life, the hinge joint is made above the center of gravity of the plate. ; -, a lever is connected to the drive through the clutch torque. Sources of information taken into account in the examination of J fi49268 6 1. German Patent No. 194947, cl. From 21 to 7/18, 1973., 2. USSR author's certificate No. 523139, cl. From 21 to 7/18, 1976. 4