Two-position three-way reversing valve stem seal replacing method
A two-position three-way valve, two-position three-way technology, applied in the direction of multi-way valves, shaft seals, valve details, etc., can solve the problems of reducing product output, reducing production operation rate, time-consuming and labor-intensive, and saving energy , reduce downtime rate, improve maintenance efficiency
Active Publication Date: 2014-09-24
INNER MONGOLIA BAOTOU STEEL UNION
View PDF5 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
The "Safety Operation Regulations" in the gas operation area strictly stipulates that the maintenance of the two-position three-way reversing valve needs to be blocked; the heating furnace chooses to use the wafer butterfly valve before and after the two-position three-way valve, and the blind plate needs to be blocked during daily maintenance. board, time consuming
The service life of the seal of the two-position three-way valve is generally about half a year. If the blind plate needs to be blocked every time the seal is replaced, it will take a lot of production time, reduce the production operation rate, and reduce the product output.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0020] The invention changes the operation of purging and releasing nitrogen gas and blocking the blind plate in the prior art, and realizes the sealing of the valve handle of the reversing valve by using the existing equipment, thereby improving the efficiency of maintenance work.
[0021] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings and preferred embodiments.
[0022] Such as figure 1 Shown is a schematic diagram of the working principle of the two-position three-way valve of the heating furnace in the present invention.
[0023] The soot pipe 13 is connected with the induced draft fan, and the gas side pipe 23 is connected with the gas pipe. The gas supply pressure of the coal gas side is 6000~10000KPa, and the induced draft fan on the soot side sucks the soot away.
[0024] The working process of the two-position three-way valve: In the working state, the gas side cylinder 21 is in the upper...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a two-position three-way reversing valve stem seal replacing method, which comprises the following steps: when a two-position three-way valve needs to replace valve stem seal, turning off a gas-side butterfly valve and a burner valve; turning on the gas-side butterfly valve, and opening a soot-side cylinder or a gas-side cylinder, so that a soot-side valve stem or gas-side valve stem is positioned at the upper side; an induced draft fan forcing to draft air, so that the two-position three-way valve internally keeps negative pressure; disassembling a cover plate of an inspection manhole in the two-position three-way valve, continuing to use the induced draft fan to forcefully draft air, and reducing the CO content in a two-position three-way valve cavity; disassembling and taking out the soot-side valve stem or gas-side valve stem, and replacing the damaged soot-side valve stem seal or gas-side valve stem seal. The two-position three-way reversing valve stem seal replacing method provided by the invention has the advantages of greatly improving inspection efficiency and reducing downtime rate.
Description
technical field [0001] The invention relates to a maintenance technology for a two-position three-way reversing valve, in particular to a sealing replacement method for a valve handle of a two-position three-way reversing valve. Background technique [0002] At present, the two-position three-way reversing valve is one of the main components of the regenerative heating furnace. The valve handle seal of the two-position three-way reversing valve is one of the more easily damaged valve body elements and needs to be replaced frequently. The regenerative heating furnace is equipped with 36 two-position three-way reversing valves, 18 air valves, and 18 gas valves, and each valve has two valve handles for sealing. The "Safety Operation Regulations" in the gas operation area strictly stipulates that the maintenance of the two-position three-way reversing valve needs to be blocked; the heating furnace chooses to use the wafer butterfly valve before and after the two-position three-...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More IPC IPC(8): F16K41/02F16K11/10
CPCF16K11/22F16K41/02
Inventor 王连贵张长静
Owner INNER MONGOLIA BAOTOU STEEL UNION