Butterfly valve with O-shaped sealing ring and bearing

A sealing ring and bearing technology, used in shaft seals, lift valves, valve details, etc., can solve the problems of inconvenience of actual operation, increase valve stem torque, easy generation of gaps, etc., to reduce rotational torque and reliable sealing performance. , the effect of reducing the rotational torque

Inactive Publication Date: 2012-04-04
KAIRUITE VALVE
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Butterfly valve is a common valve. Butterfly valve mainly includes valve body, valve stem and butterfly plate. The butterfly plate is installed in the valve body. The valve stem is installed on the valve body and forms a fixed connection with the butterfly plate in the valve body. In some butterfly valves, the seal between the valve stem and the valve body is usually realized by packing made of flexible graphite. After the packing is filled in, it is then compressed by the packing gland. If the pressure is too tight, the torque of the valve stem will be increased; if the packing gland is too loose, it will easily produce a gap, which will cause the valve to leak, which will bring inconvenience and difficulty to the actual operation of the user.

Method used

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  • Butterfly valve with O-shaped sealing ring and bearing
  • Butterfly valve with O-shaped sealing ring and bearing

Examples

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Embodiment Construction

[0009] Such as figure 1 The figure shows a butterfly valve with an O-ring and a bearing, including a valve body 1, a valve stem 2, and a butterfly plate 3. The butterfly plate 3 is installed in the valve body 1, and the valve stem 2 is mounted on the valve body 1. One end of the valve stem 2 is fixedly connected with the butterfly plate 3 in the valve body 1, and the other end of the valve stem 2 is connected with the executive hand wheel 4, and an O-ring seal 5 is arranged between the valve stem 2 and the valve body 1 With the single-row radial ball bearing 6, several O-ring grooves 21 for accommodating the O-ring sealing ring 5 are opened on the circumferential surface of the valve stem 2, and the single-row radial ball bearing 6 is fixedly set by the bearing cover 7 on stem 2.

[0010] The O-shaped sealing ring 5 is used as the sealing structure between the valve stem 2 and the valve body 1. Compared with the sealing structure composed of flexible graphite and packing glan...

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PUM

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Abstract

The invention discloses a butterfly valve with an O-shaped sealing ring and a bearing, comprising a valve body, a valve rod and a butterfly plate, wherein the butterfly plate is arranged in the valve; the valve rod is arranged on the valve body in a penetrating manner and is fixedly connected with the butterfly plate in the valve body; the O-shaped sealing ring and the bearing are arranged between the valve rod and the valve body; and the O-shaped sealing ring is adopted as a sealing structure between the valve rod and the valve body, and compared with the sealing structure formed by adopting flexible graphite and a packing gland, not only are the assembly and the disassembly of operators convenient, but also the rotating torque of the valve rod also can be reduced, and the sealing performance is more reliable. In addition, the bearing is added between the valve rod and the valve body, the rotating torque of the valve rod can be further reduced, and the labor intensity of the operators is greatly reduced.

Description

technical field [0001] The invention relates to a valve, in particular to a butterfly valve with an O-shaped sealing ring and a bearing. Background technique [0002] Butterfly valve is a common valve. Butterfly valve mainly includes valve body, valve stem and butterfly plate. The butterfly plate is installed in the valve body. The valve stem is installed on the valve body and forms a fixed connection with the butterfly plate in the valve body. In some butterfly valves, the seal between the valve stem and the valve body is usually realized by packing made of flexible graphite. After the packing is filled in, it is then compressed by the packing gland. If the pressure is too tight, the torque of the valve stem will be increased; if the packing gland is too loose, it is easy to produce a gap, which will cause the valve to leak, which will bring inconvenience and difficulty to the actual operation of the user. Contents of the invention [0003] Aiming at the deficiencies of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K41/06F16K1/22
Inventor 李运龙王少华
Owner KAIRUITE VALVE
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