A calculation method of high temperature cut-off butterfly valve for catalytic flue gas and its sealing surface

A calculation method and sealing ring technology, which is applied in the calculation field of the high-temperature cut-off butterfly valve for catalytic flue gas and its sealing ring sealing surface, can solve the problems that the valve cannot be opened, cannot meet the operation requirements, and the cut-off butterfly valve cannot apply the operation requirements, etc., to achieve Guarantee the reliability of the seal and the reliability of the action, avoid the medium particles from jamming the bearing, and maintain the effect of the flexibility of the sealing action

Active Publication Date: 2019-05-17
CHENGDU HUAKE VALVE MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the existing metal-sealed butterfly valves used in high-temperature conditions have defects in sealing performance and operational flexibility, butterfly valves are rarely used as a form of strict shut-off under high-temperature conditions. However, due to the large-scale modern industrial equipment, There is a need for a large-diameter high-temperature cut-off valve with a compact structure and light weight
Because the existing butterfly valves are not combined with the high-temperature operating conditions of the valve in terms of shaft support, sealing pairs, and system rigidity, they cannot adapt to the operating requirements above 400 °C
Because the temperature of the circulating medium is high, the valve shaft will elongate in the axial direction after being heated, which will drive the valve plate installed on it to move, and eventually the sealing ring on the valve plate will be in close contact with the valve seat, resulting in the failure to open the valve. In addition, after the sealing ring is worn for a long time, there will be a gap between the sealing ring and the valve seat, resulting in a loose seal and reducing the service life of the valve.
Moreover, due to the high pressure of the circulating medium, the valve shaft is completely deformed, and the journals at both ends of the valve shaft are stuck in the bearings, resulting in a stuck phenomenon. Therefore, the existing cut-off butterfly valve cannot be applied to the operating requirements at temperatures above 400 °C.

Method used

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  • A calculation method of high temperature cut-off butterfly valve for catalytic flue gas and its sealing surface
  • A calculation method of high temperature cut-off butterfly valve for catalytic flue gas and its sealing surface
  • A calculation method of high temperature cut-off butterfly valve for catalytic flue gas and its sealing surface

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Embodiment Construction

[0039] The present invention will be further described below in conjunction with the accompanying drawings. The protection scope of the present invention is not limited to the following:

[0040] Such as Figure 1~4 As shown, a high-temperature cut-off butterfly valve for catalyzed flue gas includes a valve body 1, a valve plate 2 and a valve shaft 3. The valve body 1 is provided with a medium flow channel 4, and the medium flow channel 4 is provided with a cone The valve seat 5 is provided with stepped holes 6 on the valve body 1 and located on the left and right sides of the medium flow channel 4. The stepped holes 6 are provided with a shaft support structure, the two shaft support structures are symmetrically arranged, and the shaft support structure includes a bearing The inner ring 7, the bearing outer ring 8, the positioning ring 10, the lubricating ester adding device 11 and the purging device 12. The positioning ring 10 is fixed in the small hole of the step hole 6, and ...

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Abstract

The invention discloses a high temperature stop butterfly valve for catalysis smoke. The high temperature stop butterfly valve comprises a valve body (1), a valve plate (2) and a valve shaft (3). A medium runner (4) is arranged in the valve body (1). A shaft support structure is arranged in a stepped hole (6). A shaft locating ring (10) is fixed in a small hole of the stepped hole (6). One end ofthe locating ring (10) stretches into the medium runner (4). A bearing outer ring (8) is arranged in a large hole of the stepped hole (6). A spherical groove (13) is formed in the bearing outer ring (8). A bearing inner ring (7) capable of rotating around the axis of the spherical groove (13) is arranged in the bearing outer ring (8). An installing hole (14) penetrating through the bearing inner ring (7) is formed in the middle of the bearing inner ring (7). The high temperature stop butterfly valve has the beneficial effects of being compact in structure, reliable in operation, tight in sealing and long in service life.

Description

Technical field [0001] The invention relates to the technical field of cut-off butterfly valve structures, in particular to a high-temperature cut-off butterfly valve for catalytic flue gas and a calculation method for the sealing surface of its sealing ring. Background technique [0002] At present, the butterfly valves used for shut-off mainly include butterfly valves with single eccentric, double eccentric and triple eccentric structures, and the structure that can realize metal-to-metal close breaking is only a triple eccentric structure. Because the existing metal-sealed butterfly valves used in high temperature conditions have defects in sealing performance and flexibility of action, butterfly valves are rarely used as a form of tight shutoff under high temperature conditions. However, due to the large-scale modern industrial equipment, There is a need for a large-diameter high-temperature cut-off valve with compact structure and light weight. Because the existing butterfl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K1/22F16K1/226G06F17/50
CPCF16K1/22F16K1/224F16K1/2261G06F30/17G06F2111/10
Inventor 陈智邱宏斌鲍巧灵刘国强杨炯波代大文
Owner CHENGDU HUAKE VALVE MFG
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