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High-temperature seal valve

A high-temperature sealing and sealing surface technology, applied in the direction of lifting valves, valve devices, engine components, etc., can solve problems such as pipeline deposits, liquid metal outflow, and potential safety hazards, so as to reduce equipment failures, eliminate sticking, and improve sealing. Effect

Inactive Publication Date: 2018-06-15
朱书红
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this type of sealing valve uses liquid metal. The liquid metal needs to melt the solid metal when it is filled, and it still needs to be melted with a heating device when it is restarted after it is stopped. What is more serious is that when it is opened and closed, due to When the pressure difference on both sides of the sealing groove changes instantaneously and the liquid metal is immersed in the isolation cover shallowly, the liquid metal is on both sides of the isolation cover, and the pressure difference formed by the liquid level is not enough to seal the injection gas instantly, and part of the liquid metal is blown out of the sealing groove As a result of the outflow of liquid metal, the injected metal may not be able to meet the sealing requirements, and liquid metal needs to be added again. If the switching is a little more frequent, it will cause too much additional metal, deposit metal in the pipeline, and block the pipeline, another serious problem. Yes, once the liquid seal is broken, the gas will leak out or the air will enter the gas pipeline, which will bring great hidden dangers to safety

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Embodiment one, such asfigure 1 , figure 2 , image 3 with Figure 5 As shown, the present invention provides a high-temperature sealing valve, including a valve body 1, a valve seat 2, a valve core 3, a valve stem 4, and a lifting mechanism 5. The sealing surface of the valve core 3 is a conical surface, and the valve core 3 The sealing part of the seat 2 adopts an elastomer structure, which reduces rigidity and increases elastic deformation capacity, so that the sealing surface contour of the valve seat 2 fits the sealing surface contour of the valve core 3 more closely.

[0036] The high-temperature sealing valve also includes a thermal expansion and cold shrinkage compensation mechanism 6 and a limit mechanism 7 of the sealing resultant force. The sealing resultant force refers to the force transmitted to the valve core 3 and the valve seat 2 by the lifting mechanism when the sealing valve is closed. Between the lifting mechanism 5 and the valve stem 4, a compens...

Embodiment 2

[0044] Embodiment two, such as figure 1 , figure 2 , Figure 4 with Image 6 As shown, the present invention provides a high-temperature sealing valve, including a valve body 1, a valve seat 2, a valve core 3, a valve stem 4, and a lifting mechanism 5. The sealing part of the valve seat 2 adopts an elastomer structure to reduce rigidity. , to increase the elastic deformation capacity, so that the sealing surface contour of the valve seat 2 fits the sealing surface contour of the valve core 3 more closely.

[0045] The high-temperature sealing valve also includes a thermal expansion and cold shrinkage compensation mechanism 6 and a limit mechanism 7 of the sealing resultant force. The sealing resultant force refers to the force transmitted to the valve core 3 and the valve seat 2 by the lifting mechanism when the sealing valve is closed. Between the lifting mechanism 5 and the valve stem 4, a compensation mechanism 6 for thermal expansion and contraction, and a limit mechan...

Embodiment 3

[0053] Embodiment three, such as Figure 7 As mentioned above, the difference between the third embodiment and the first embodiment is that the sealing surface 31 of the plate structure is welded on the valve core 3 in the third embodiment, which has better elasticity and better sealing performance.

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Abstract

The invention provides a high-temperature seal valve, which comprises a valve body, a valve seat, a valve element, a valve rod and a lifting mechanism. A seal part(s) of the valve seat or / and the valve element adopt(s) an elastic structure(s); the elastic structure(s) of the valve seat or / and the valve element has (have) the capabilities on reducing self-rigidity and improving self-elastic deformation; and when the valve element extrudes the valve seat, a profile of a sealing surface of the valve element fits to a profile of a sealing surface of the valve seat. According to the high-temperature seal valve provided by the invention, the sealability of hard sealing of the high-temperature valve is greatly improved, the operation reliability of the high-temperature seal valve is improved through an expansion-and-contraction withdrawal compensation mechanism and a sealed resultant-force limiting mechanism, the phenomena of clamping stagnation and occlusion occurred on the lifting mechanismdue to expansion and contraction are avoided, and the service life of the valve is greatly prolonged.

Description

technical field [0001] The invention relates to the technical field of sealing valves, in particular to a high-temperature sealing valve. Background technique [0002] For sealing valves with a temperature higher than 300°C, the sealing performance becomes a difficult problem, especially for sealing valves with a diameter greater than 800mm, the sealing performance is even more problematic. In an environment with a temperature greater than 300°C, flexible sealing materials similar to rubber are useless, and hard seals have to be considered, but hard seals are not synchronized or inconsistent, or even deformed due to thermal expansion and contraction between the sealing parts. The sealing surface is not sealed. In addition, once the thermal expansion is too large, it is easy to cause the transmission mechanism or the lifting mechanism to be stuck, and even the sealing valve is damaged. [0003] The invention with the publication number of 103615586B discloses an improved gas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K1/00F16K1/32F16K1/42F16K1/36
CPCF16K1/00F16K1/32F16K1/36F16K1/42
Inventor 朱书红
Owner 朱书红