Air-tight gate valve for slag flushing ditch

A slag flushing ditch and air-sealing technology, which is applied in the field of gate valves for air-sealed slag flushing ditch, can solve the problems of short service life of gate valves, serious corrosion of gate valves, high failure rate, etc., to prolong service life, Reduce corrosion and work reliably

Active Publication Date: 2018-09-07
ZENITH STEEL GROUP CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the temperature of the mixture in the blast furnace slag ditch is high and contains corrosive substances such as sulfur, a large amount of steam is generated, which severely corrodes the gate valve on the slag ditch. The gate valve has a short service life, high failure rate and affects production

Method used

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  • Air-tight gate valve for slag flushing ditch
  • Air-tight gate valve for slag flushing ditch
  • Air-tight gate valve for slag flushing ditch

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Embodiment Construction

[0023] The present invention will now be described in detail with reference to the drawings. This figure is a simplified schematic diagram, which only illustrates the basic structure of the present invention in a schematic manner, so it only shows the structure related to the present invention.

[0024] Such as Figure 1-4 As shown, an air-tight gate valve for slag flushing ditch of the present invention includes a hydraulic cylinder 5, an upper valve body 3, a lower valve body 1, a valve plate 2, a gas filling component, and a sealing component. The gas filling component includes a pressure limiting valve 4 and intake pipe 6. Preferably, in order to match the arc-shaped cross-sectional structure of the lower part of the existing slag flushing ditch, the cross-sectional shape of the lower part of the lower valve body 1 of the present invention adopts an arc-shaped design. The lower valve body 1, the upper valve body 3 and the valve plate 2 are all welded by stainless steel corr...

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Abstract

The invention provides an air-sealed gate valve for slag flushing ditch, which includes a hydraulic cylinder, an upper valve body, a lower valve body, a valve plate and an inflatable component. The hydraulic cylinder and the inflatable component are connected to the upper valve body, and the hydraulic cylinder There is a piston rod, and the upper end of the upper valve body and the lower valve body are connected to form a sealed box. The sealed box is filled with sealing gas through an inflatable component. Valve outlet, the upper end of the valve plate is connected with the piston rod, and the connecting end of the valve plate and the piston rod is located in the sealed box, the hydraulic cylinder drives the valve plate to move up and down in the valve plate groove through the piston rod to realize the connection and isolation of the valve inlet and valve outlet . The present invention adopts the structural design of the sealing box, protects the key parts valve plate and cylinder piston rod with the sealing box, and fills the gas into the sealing box. Corrosion of components reduces the valve failure rate and prolongs the service life of the valve.

Description

Technical field [0001] The invention relates to the technical field of metallurgical equipment, in particular to an airtight gate valve for slag flushing ditch. Background technique [0002] The slag produced in the blast furnace smelting process is often water quenched by hydraulic slag flushing, and the slag-water mixture after water quenching flows into the water slag sedimentation tank through the blast furnace flushing ditch. A gate valve is usually provided on the blast furnace slag ditch to control the blast furnace slag water mixture to enter the slag sedimentation tank. Because the temperature of the mixture in the blast furnace slag ditch is high, and it contains corrosive substances such as sulfur, a large amount of steam is generated, which corrodes the gate valve on the slag ditch seriously. The gate valve has a short service life, high failure rate and affects production. Summary of the invention [0003] The technical problem to be solved by the present invention i...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): F16K3/02F16K3/30F16K41/00
CPCF16K3/0281F16K3/30F16K41/003
Inventor卢维强
OwnerZENITH STEEL GROUP CORP