Hand stop valve with sealing compensation
A manual globe valve and valve seat technology, applied in shaft seals, lift valves, valve details, etc., can solve the problems of medium leakage, external leakage of gaps, thermal expansion and contraction stress of valve stem, etc., to avoid leakage and avoid external sealing. The effect of leakage
Inactive Publication Date: 2016-11-09
JIANGSU HAINA MECHANICAL & ELECTRIC EQUIP GRP +1
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Problems solved by technology
In order to prevent the external leakage of the medium, the valve stem must be sealed, and a stuffing box is set in the valve seat, and the stuffing box is filled with elastic soft packing, so that the valve stem rotates in the valve seat without leakage, but due to the rotation of the valve stem Packing wear and packing are affected by temperature changes or expansion and contraction due to vibration. After a long time, gaps will be formed and external leakage will occur.
The internal sealing of the valve is achieved by the valve stem pressing the valve core through the pressing force between the valve core and the valve seat. However, long-term use will cause stress relaxation of the valve stem due to thermal expansion and contraction or vibration due to temperature changes. The pressing force between the core and the valve seat is not enough, resulting in the leakage of the medium in the valve
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[0016] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. The following description of at least one exemplary embodiment is merely illustrative in nature and in no way taken as limiting the invention, its application or uses. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention. Relative arrangements of components and steps are set forth in these embodiments unless specifically stated otherwise. Expressions and numerical values do not limit the scope of the present invention. At the same time, it should be understood that, for the convenience of description, the sizes of th...
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The invention discloses a hand stop valve with sealing compensation. The hand stop valve with sealing compensation comprises a valve body, a valve seat, a valve rod, a valve deck and a valve plug, wherein the valve rod is in sealing connection with the valve seat through packing, the valve deck is assembled at the end of the valve seat, a packing gland is arranged between the valve deck and the valve seat, the packing and the packing gland are connected through an elastic assembly, and the valve rod and the valve plug are connected through an elastic assembly. It can be seen that according to the hand stop valve with sealing compensation, the valve rod and the valve plug are connected through the corresponding elastic assembly, the valve plug and the valve body close up through the corresponding elastic assembly by adjusting the valve rod, and valve closing sealing (internal sealing) compensation is achieved. Therefore, the hand stop valve with sealing compensation is especially suitable for the occasions which are great in temperature variation and require a hand stop valve to be long in service life and not prone to leakage.
Description
technical field [0001] The invention discloses a manual stop valve. Background technique [0002] The valve rod of the existing manual shut-off valve is threadedly connected with the valve seat, and the valve rod moves up and down by rotating in the valve seat to realize the opening and closing of the shut-off valve. In order to prevent the external leakage of the medium, the valve stem must be sealed, and a stuffing box is set in the valve seat, and the stuffing box is filled with elastic soft packing, so that the valve stem rotates in the valve seat without leakage, but due to the rotation of the valve stem Packing wear and packing are affected by temperature changes or expansion and contraction due to vibration. After a long time, gaps will be formed and external leakage will occur. The internal sealing of the valve is achieved by the valve stem pressing the valve core through the pressing force between the valve core and the valve seat. However, long-term use will cause...
Claims
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IPC IPC(8): F16K1/00F16K41/02F16K1/32
CPCF16K1/00F16K1/32F16K41/02
Inventor 王征王成虎蔡纪星
Owner JIANGSU HAINA MECHANICAL & ELECTRIC EQUIP GRP