SU1122698A1 - Method of replacing seat and place of blast furnace valve - Google Patents

Abstract

METHOD FOR REPLACING THE SADDLE AND IAPELS OF THE DOMAIN VALVE VALVE, including disconnecting the seat from the valve body, lowering the plate on the lever of the valve drive shaft to the lower position and replacing the seat and plate, so that it reduces the time and labor for replacing the repair the valve, before disconnecting the seat to the housing, the plate is connected to the seat and after they are jointly lowered on the lever, the coupling connecting the actuator to the valve shaft is disconnected, then the actuator is returned to its original position, the coupling is connected, the outlet to the saddle is removed after the replacement of the seat and the plate, they are returned to the lower vertical position, they again disconnect the coupling, move the drive to another extreme position and connect the coupling, after which the saddle with the plate is returned to its original position, fix the saddle on the housing and disconnect it with the plate.

Description

This invention relates to ferrous metallurgy, in particular to the equipment of blast furnaces.

There is a known method of replacing valve mechanisms by the node method with the help of additional rigging means or special devices and.

Replacing the valve with the node is brought out of the loading device into the zone of action of the crane, and a new valve is supplied to the place of its installation. At present, there are no workable ones (special mechanisms for replacing the valves. In addition, additional sarpo mechanisms can be used by the furnace and require material manufacturing and operation costs. When replacing valve mechanics with a node, it is necessary to unseal the nodes of the loading device tract, which complicates its design and makes it difficult to install seals in junction points and impairs the tightness of the path.

The closest to the invention to the technical essence and the achieved result is a method for replacing the seat and valve plate, including disconnecting the seat from the housing, lowering the plate on the valve drive shaft lever. lower position and. replace saddles and tareli. is replaced by rigging through the mon; tazhny hatch in the valve body. When replacing the seat, it is moved between the flanges of the valve body and the valve valve. To do this, the valve above the valve is dismounted or raised 2.

The disadvantages of this method are the need to perform a large amount of labor-intensive installation work, the use of additional mechanisms and rigging tools. This makes it difficult to replace and center the plate in cramped conditions, and it is difficult to install sealing gaskets between the flanges of the seat, the valve body and the valve valve. All this increases the time and labor intensity of valve repair.

The aim of the invention is to reduce the time and labor involved in replacing the valve repair.

The goal is achieved by the method involving disconnecting the seat from the Gshapan body, lowering the plate on the lever of the valve drive shaft to the lower position and replacing the seat and plate before disconnecting the seat to the body, disconnecting the plate to the saddle and after lowering them together on the lever

The actuator is connected to the valve shaft, then the actuator is returned to its original position, the coupling is connected and the plate with the saddle is pulled out of the body, and after the saddle and the plate is returned to the lower vertical position, the coupling is again separated, the actuator is moved to the other extreme position and connect the clutch, after which the seat with the plate is returned to its original position, the saddle is fixed on the body and separated from the plate.

FIG. I schematically shows the valve mechanism in the initial closed position; in fig. 2 - the same, top view; Fig, 3 - installation plate with the saddle in the lower position; in fig. 4 - output plate with a saddle outside the valve body ..

The method is performed step by step in a sequence.

Open the mounting hatch 1, shedey yut plate 2 with the saddle 3 mounting wedges 4 and remove the fastening elements 5 connecting the saddle 3 with the housing 6. Drive 7 plate with the saddle moved to the lower vertical attachment (Fig.3) using the lever 8. Disconnect the coupling 9 connecting the actuator 7 to the valve shaft 10, and return the actuator to its original position (shown in dotted line in Fig. 3). Coupling 9 is connected and the plate with the saddle is pulled out of the body (figure 4). Then the plate-saddle set is replaced, gaskets are installed to seal the joint between the seat and the body, the plate with the seat is returned to the lower vertical position, after which the coupling 9 is disconnected and the actuator 7 is moved to another extreme position. Coupling 9 is connected and the plate 2 is moved with the saddle to the flange of the housing; fixing elements 5 are installed, the seat is fixed on the body, the mounting wedges 4 are removed and the mounting hatch is closed.

Example. Under laboratory conditions, a model of the blast furnace path is carried out on a scale on which the well-known and proposed methods for replacing the valve seat and plate are tested. It has been found that, in comparison with the known npeftaaraei-ftift, the method does not require lifting the valve valve and sealing its joints after constrained conditions as well. Also, the production of complex work with bulky nodes and using rigging tools. The table gives the time to replace the seat and plate of the blast furnace valve according to the proposed and well-known methods.

The proposed method

Opening the mounting hatch

Seat plate connection

Shooting mounting bolts

Moving the plate and saddle

Clutch disconnection and drive reset

Coupling connection and output of the plate and seat outside the enclosure

Replacing the plate and seat and installing gaskets

Return plate and saddle

way down

Coupling disconnection and drive transfer to the other end position

Coupling coupling, moving the seat and plate to the housing flange

Seat fastening and mounting wedges

Closing installation

hatch

Known method

Opening the mounting hatch

Joint separation

Rise of nadklapanny capacity

Move Tarel down

Replacing the plate using rigging tools

Replacing the saddle.

Installation of gaskets on the flanges of the saddle

Closing the valve, centering plate and seat in the body

Saddle fastening

Lowering the supra-valve container 10

Sealing the joints above the valve 60

Closing installation

hatch20. As can be seen from the table, the time spent on repairing the valve in accordance with the proposed method and the laboriousness of the repair work in comparison with the known method is reduced almost 2 times. The proposed method, by comparison with the known, allows to reduce the amount of installation work in the charge path and the downtime of the blast furnace, it most fully meets the requirements of safety engineering and contributes to the improvement of the quality of repair work.

Claims (1)

METHOD FOR REPLACING THE DOMAIN VALVE SEAT AND VALVE ROD, in the acacia key, disconnecting the seat from the valve body, lowering the plate on the valve drive shaft lever to the lower position and replacing the seat and plate, which means that, in order to reduce the time and laboriousness of replacing it with repair of the valve, before disconnecting the seat with the body, the plate is connected to the seat and, after lowering them together on the lever, the coupling connecting the actuator to the valve shaft is disconnected to the initial position, the body plate is brought out, and the seats and plates are lowered In this case, the clutch is again disconnected, the drive is moved to the other extreme position and the clutch is connected, after which the saddle and plate are returned to their original position, the saddle on the body is strengthened and it is disconnected from the plate. then the drive is returned, they are connected to the muff with a saddle after replacing them vertically