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Eccentric/concentric combined sealing valve seat

A sealing valve, combined technology, applied in multi-way valves, valve devices, cocks including cut-off devices, etc., can solve problems such as low sealing level, poor opening of valves, easy accumulation of medium, etc., and achieve high sealing level , Eliminate the effect of inflexible opening and valve jamming

Active Publication Date: 2010-11-17
吴军
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the low sealing level, imported and domestic three-way valves with B structure are easy to accumulate medium in the valve cavity in the medium with solid particles, resulting in poor opening of the valve until it is stuck.

Method used

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  • Eccentric/concentric combined sealing valve seat
  • Eccentric/concentric combined sealing valve seat

Examples

Experimental program
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Effect test

Embodiment Construction

[0010] Depend on figure 1 It can be seen that the present invention is arranged in the valve body flow port of a three-way reversing valve comprising a valve body 1, a spherical double-channel valve core 2, a valve cover and an opening and closing shaft, and it is composed of a concentric sealing valve seat and an eccentric sealing valve seat. Set at both ends of the valve body 1 and the valve core 2, the valve seat and the valve core 2 are fitted and sealed by the spring preload force and medium pressure, including the eccentric sealing valve seat body 4, the concentric sealing valve seat body 5, and the flat spring 12. Support ring 7, eccentric sealing ring 6, valve seat pressure cap 8, sealing gasket 9, adjusting pad 10, eccentric soft seal 13 and concentric sealing ring 11, of which:

[0011] The concentric sealing valve seat body 5 is set between the valve core 2 flow channel opening and the inner wall of the valve body 1, and is concentric with the valve core 2 and forms...

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Abstract

The invention relates to an eccentric / concentric combined sealing valve seat which is arranged in the body channel mouth of a three-way change valve comprising a valve body, a spherical double-channel valve plug, a valve cap and a start-stop shaft. The eccentric / concentric combined sealing valve seat is formed by concentric sealing valve seats and eccentric sealing valve seats which are arranged at the two ends of the channel mouths of the valve body and the valve plug. The valve seat and the valve plug are fit and sealed by spring pre-tightening force and medium pressure. The eccentric / concentric combined sealing valve seat comprises eccentric sealing valve seat bodies, concentric sealing valve seat bodies, plate springs, bearing rings, eccentric sealing rings, valve seat pressure caps, sealing gaskets, adjusting gaskets, eccentric soft seals and concentric sealing rings. The eccentric / concentric combined sealing valve seat ensures high valve sealing grade, can achieve zero leakage, thoroughly eliminates the problems of valve blocking and inflexible opening, has the service life as long as more than 200000 times, has good use effect on the chemical pipelines and does not have faults till now.

Description

technical field [0001] The invention relates to a valve, in particular to an off-center combined sealing valve seat with improved sealing of a three-way reversing valve. Background technique [0002] At present, domestic and imported three-way reversing valves generally adopt the following two structures: A: The axis of the flow channel of the valve body passes through the center of the valve body and the valve core, such as a three-way valve with an angle of 60°. B: There is an eccentric moment between the axis of the valve body flow channel and the center of the valve body and valve core, such as a three-way valve with an angle of 45° and 30°. The A structure is simple in structure, easy to process and good in sealing performance, but the structure is huge, especially when the angle of the three-way valve is below 45°, due to the use of the A structure, the structure size is too large and the cost is high, and the B structure is generally used. The size of the three-way v...

Claims

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Application Information

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IPC IPC(8): F16K5/20F16K11/087
Inventor 吴军
Owner 吴军
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