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Hot valve and manufacturing method thereof

A manufacturing method and valve body technology are applied in the field of valve devices and high-temperature valve switches in hypersonic wind tunnel operation, which can solve the problems of short working life of valves, leakage of cooling water from valve seats, test failures, etc., so as to improve the service life and economy performance, ensure reliability, and eliminate the effect of weld cracking

Pending Publication Date: 2020-08-28
中国空气动力研究与发展中心超高速空气动力研究所 +1
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Problems solved by technology

The research found that: when the working temperature rises or falls rapidly, due to the differences in the linear expansion coefficients of dissimilar materials, the weld seam will crack, which will cause the cooling water in the valve seat to leak into the valve cavity, resulting in the failure of the test; this is also An important reason for the short service life of such valves

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  • Hot valve and manufacturing method thereof
  • Hot valve and manufacturing method thereof

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Embodiment Construction

[0026] In order to make the purpose, technical solutions and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be described clearly and completely in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments It is a part of the embodiments of this application, but not all the embodiments. Based on the embodiments in this application, all other embodiments obtained by a person of ordinary skill in the art without creative work shall fall within the protection scope of this application.

[0027] Hereinafter, the present invention will be further described through embodiments in conjunction with the drawings.

[0028] Such as figure 1 As shown, the thermal valve suitable for regenerative heaters includes valve body 1, lower spacer 2, valve seat 3, upper spacer 4, valve core 5, valve cover 6, bracket 7 and hydraulic cylinder 8, valve seat 3 is located in the in...

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Abstract

The invention provides a hot valve and a manufacturing method thereof. The hot valve comprises a valve body and a valve seat, wherein the valve seat is located in an inner cavity of the valve body. The hot valve further comprises a spacer bush made of the same material as the valve body, the spacer bush is located on a sealing face between the valve body and the valve seat, and the spacer bush isin interference fit with the valve seat and welded to the valve body. Compared with the prior art, according to the technical scheme provided by the invention, dissimilar metal welding is converted into same metal welding by adopting interference fit and hot charging processes, so that the expansion amount of parts on the two sides of a weld joint is consistent when the temperature is changed, thedefect of weld joint cracking is eliminated, and the requirement of a wind tunnel test device on the hot valve is met.

Description

Technical field [0001] The invention belongs to the technical field of valve devices, and specifically relates to a valve body-valve seat installation structure of a thermal valve and a manufacturing method thereof, and is particularly suitable for the field of high-temperature valve switching during operation of a hypersonic wind tunnel. Background technique [0002] The regenerative heater needs to preheat the heat storage element for a long time. The maximum preheating temperature is 900°C and the maximum pressure is 12.0Mpa. In order to reduce the influence of heat on the equipment behind the heater, it is necessary to install a valve at the heater outlet to reduce the heat transfer. According to the requirements of equipment operation, the hot valve should have the function of fast switching, and the rapid start of the equipment can be realized through the rapid opening of the hot valve. [0003] At present, the existing hot valve uses GH3128 material for its valve seat, whil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K1/32F16K1/42F16K27/02B23P11/02B23K31/02
CPCF16K1/427F16K1/32F16K27/02B23P11/025B23K31/02
Inventor 侯峰伟吴斌张峻宾侯文辉王理侬章起华许晓斌吕超崔晓明种会芳
Owner 中国空气动力研究与发展中心超高速空气动力研究所
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