Valve metal sealing pair structure utilizing micro-deformation self-pressurizing compensation of thin sheet
A technology of metal sealing and metal sealing sheet, which is applied in the direction of lifting valve, valve device, engine components, etc., can solve the problems of seal failure of sealing pair, gap of sealing pair, reliability of pressure-reducing automatic valve, etc., so as to improve sealing effect and reliability The effect of sex and simple structure
Pending Publication Date: 2019-01-15
DALIAN MARINE VALVE
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Problems solved by technology
Affected by the warping and deformation of the sealing surface on the side of the valve seat, a gap is formed between the sealing pair of the valve seat and the valve disc, resulting in the failure of the sealing pair and reducing the reliability of the pressure automatic valve
Method used
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Embodiment Construction
[0010] The present invention will be further described below in conjunction with accompanying drawing:
[0011] Such as figure 1 , 2 As shown, a valve metal seal pair structure that utilizes sheet micro-deformation self-pressure compensation is composed of a valve seat 2, a valve disc 3 and a metal seal 5 located between them. The metal seal has a certain elastic deformation capacity round metal foil. The metal sealing sheet 5 is installed on the valve disc 3, and is fixed at its central position by a pressure plate 4 and a screw 6, and a gap 7 is provided between its edge position and the end face of the valve disc, the sealing surface of the metal sealing sheet and the valve seat The side sealing surfaces fit together tightly to form a sealing pair. The valve seat 2 of this embodiment is inlaid on the valve body 1, and the structure of this part is the same as that of a general valve, and the other structures of the valve disc are the same as those of the prior art, and w...
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The invention provides a valve metal sealing pair structure utilizing micro-deformation self-pressurizing compensation of a thin sheet. The valve metal sealing pair structure comprises a valve seat side sealing surface and a valve disk sealing surface, and is characterized by arranging a metal sealing sheet between a valve seat and a valve disk, wherein the metal sealing sheet is fixed on the valve disk, one side surface of the metal sealing sheet is tightly attached to the valve seat side sealing surface to form a sealing pair, and a gap is formed in the other side surface between the edge position thereof and the end surface of the valve disk. The valve metal sealing pair structure has the advantages that: the structure is simple, the metal sealing sheet is always kept in a shape identical with that of the valve seat side sealing surface by utilizing the functions of elastic deformation and medium pressure of the metal sealing sheet, and the metal sealing sheet and the valve seat side sealing surface are tightly attached without a gap; and the sealing pair structure having an automatic compensation function can ensure that the valve cannot reduce the sealing performance due to the influence of ambient temperature conditions, and improves the sealing effect and reliability of the valve.
Description
technical field [0001] The invention relates to a metal sealing pair structure of a valve, in particular to a metal sealing pair structure of a valve using micro-deformation self-pressure compensation for a valve. Background technique [0002] Pressure automatic valves, such as check valves, safety valves, and pressure reducing valves, usually rely on the tight contact between the valve disc and the valve seat to form a sealing pair. At present, pressure automatic valves used in high temperature, ultra-high temperature, low temperature, ultra-low temperature and other fields mostly adopt metal sealing structure. During use, the metal sealing pair will be slightly deformed by the influence of temperature changes. This small deformation mainly occurs on the sealing surface of the valve seat side. The valve seat is mostly embedded on the valve body or integrated with the valve body. The shape is mostly irregular, and the amount of expansion and deformation on the valve body is...
Claims
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IPC IPC(8): F16K1/46F16K1/36
CPCF16K1/36F16K1/46
Inventor 孙春强周雪辛铭陈满裕王世凯高斌王希超王原胜
Owner DALIAN MARINE VALVE