Hydrant seal structure with double sealing

A technology of double sealing and sealing structure, applied in the direction of lift valves, engine components, mechanical equipment, etc., can solve the problems of easy-leaking soft-sealed fire hydrants, non-fire resistance, etc., to ensure integrity and safety, compact structure, mutual Change the effect of strong versatility

Inactive Publication Date: 2016-10-26
王艺澄
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the problem that the hard-sealed fire hydrant in the prior art is easy to leak when it is di

Method used

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  • Hydrant seal structure with double sealing
  • Hydrant seal structure with double sealing
  • Hydrant seal structure with double sealing

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0038] Example 1: Such as image 3 As shown, the hard seal pair 801 and the soft seal pair 802 are arranged on the plane contact surface formed by the metal valve disc 6 and the metal valve body 7, and the elastic seal 9 constituting the soft seal pair 802 is arranged on the metal valve body 7. The elastic seal 9 adopts a seal ring, which is arranged inside the hard seal pair 801. When sealing, the metal valve body between the inner wall of the metal valve body 7 and the top of the metal valve body between the sealing ring and the metal valve disc 6 meets, that is, the top of the metal valve body between the inner wall of the metal valve body 7 and the sealing ring is the same as the metal valve. There is a certain gap 704 between the discs 6; the top of the sealing ring is higher than the top of the metal valve body 7 before the fire hydrant is not sealed. Adjusting the height of the sealing ring can change the sealing pressure distribution, so that the sealing pair 801 and 802...

Example Embodiment

[0039] Example 2: Such as Figure 4 As shown, the hard seal pair 801 and the soft seal pair 802 are arranged on the plane contact surface formed by the metal valve disc 6 and the metal valve body 7, and the elastic seal 9 constituting the soft seal pair 802 is arranged on the metal valve disc 6. The elastic seal 9 adopts a sealing gasket, which is arranged inside the hard sealing pair 801. The top of the sealing gasket is higher than the top of the metal valve disc 6 before the fire hydrant is sealed. Adjusting the height of the sealing gasket can change the sealing pressure distribution so that the sealing pairs 801 and 802 can reach the specified sealing specific pressure.

Example Embodiment

[0040] Example 3: Such as Figure 5 As shown, a tapered contact surface is provided between the metal valve disc 6 and the metal valve body 7, and the soft seal pair 802 is provided on the tapered contact surface. The hard seal pair 801 is arranged on the plane contact surface of the metal valve disc 6 and the metal valve body 7. The metal valve disc 6 has a valve disc cone structure 601. The lower end of the valve disc cone structure 601 has a diameter smaller than the upper diameter (in an inverted cone structure), and the corresponding metal valve body 7 is provided with an upper mouth diameter larger than The cone-shaped accommodating cavity 701 of the valve body with the lower port diameter is used to cooperate with the cone-shaped structure of the valve disc 601. The root of the cone-shaped valve structure 601 is provided with a valve disc contact plane, which corresponds to the cone-shaped accommodation of the valve body constituting the metal valve body 7. The top of th...

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Abstract

The invention discloses a hydrant seal structure with double sealing, forming a double sealing pair between a metal valve disc and a metal valve body when a hydrant is turned off; the hydrant seal structure is characterized in that the sealing pair includes a combination of more than one rigid sealing pair and more than one soft sealing pair; the rigid sealing pair is formed by direct contact of the metal valve disc and the metal valve body; the soft sealing pair is formed by the metal valve body mating with an elastic seal on the metal valve disc; or the metal valve disc mates with an elastic seal on the metal valve body to form the soft sealing pair. The seal structure of the invention has the advantages of both rigid sealing and soft sealing, has fire tolerance as in a rigid-sealed hydrant and also has good sealing performance as in a soft-sealed hydrant. Legal requirements in International Convention for the Safety of Life at Sea are met, and marine usage requirements are also met.

Description

technical field [0001] The invention relates to a sealing structure with double sealing for a fire hydrant. Background technique [0002] Fire is one of the most important factors affecting the safety of ships. Fixed water-based fire extinguishing system is the most basic fire extinguishing method used by ships, and fire hydrants are indispensable equipment in the fire fighting system. Currently commonly used fire hydrant standards include: Chinese marine fire hydrant national standard GB / T2032, Japanese marine standard JIS F7334, Chinese ship industry standard CB / T4032, German fire standard DIN86211. Among them, GB / T2032 allows the use of soft-sealed fire hydrants; DIN 86211 also has a soft-sealed fire hydrant structure, but it is not a marine fire hydrant standard; JIS and CB standards only have hard-sealed structures. "International Convention for the Safety of Life at Sea (SOLAS) II-2 Article 10 2.1.1 stipulates: "Materials that are liable to fail when exposed to heat s...

Claims

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Application Information

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IPC IPC(8): F16K1/46
CPCF16K1/46
Inventor 王艺澄
Owner 王艺澄
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