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Novel high-airtightness gate valve

A technology of high sealing and gate valves, applied in the direction of shaft sealing, sliding valves, valve details, etc., can solve the problems of inability to adjust and throttle, achieve good sealing, reliable sealing, and increase the effect of lubricity

Inactive Publication Date: 2018-11-23
TIANJIN DINGJIN VALVE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The opening and closing part of the gate valve is a gate, and the movement direction of the gate is perpendicular to the direction of the fluid. The gate valve can only be fully opened and fully closed, and cannot be adjusted or throttled.

Method used

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  • Novel high-airtightness gate valve
  • Novel high-airtightness gate valve

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Embodiment Construction

[0013] The present invention will be further elaborated below in conjunction with the accompanying drawings and specific embodiments.

[0014] Such as figure 1 with figure 2 As shown, a new type of high sealing gate valve, including hand wheel 1, stem nut 2, packing 3, middle bonnet 4, middle flange 5, valve stem 6, valve body 7, valve 8, floating valve seat 9 1. The upper bonnet 10, the upper bonnet 10 is connected with the middle bonnet 4 and the valve body 7 through fastening bolts, the middle flange 5 is installed between the middle bonnet 4 and the valve body 7, and the valve stem 6 passes through the valve stem nut 2 Fixed installation, the upper bonnet 10 is filled with packing 3, the bottom end of the valve stem 6 is threadedly connected to the valve 8, the floating valve seat 9 is fixedly installed in the pipe of the valve body 7, and the hand wheel 1 is installed on the top of the valve stem 6 through a fastening nut .

[0015] The valve stem nut 2 adopts an inte...

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Abstract

The invention discloses a novel high-airtightness gate valve. The novel high-airtightness gate valve comprises a hand wheel, a valve stem nut, packing, a middle valve deck, a middle flange, a valve stem, a valve body, a valve door, a floating valve seat and an upper valve deck. The upper valve deck is connected with the middle valve deck and the valve body through fastening bolts. The middle flange is mounted between the middle valve deck and the valve body. The valve stem is fixedly mounted through the valve stem nut. The upper valve deck is filled with the packing. The bottom end of the valve stem is in threaded connection with the valve door. The floating valve seat is fixedly mounted in a valve body pipeline. The hand wheel is mounted at the top end of the valve stem. The valve stem nut of the high-airtightness gate valve is of an intensional structure. The novel high-airtightness gate valve is provided with an oil filling port and is light, convenient and flexible to operate. A packing spacer ring is arranged in the packing in a filling manner and additionally filled with sealing grease. The reliable airtightness of the valve stem is ensured, and the lubricity of the valve stem is improved. The middle flange is provided with a metal corrugated gasket and is reliable in sealing. Through the design of a floating gasket of the floating valve seat structure, the high airtightness of an inlet / outlet can be ensured. A sealing valve seat located on the upper side of the floating valve seat is sealed through a double-sealing ferrule.

Description

technical field [0001] The invention relates to the field of valve machinery, in particular to a novel high-tightness gate valve. Background technique [0002] The opening and closing part of the gate valve is the gate, and the movement direction of the gate is perpendicular to the direction of the fluid. The gate valve can only be fully opened and fully closed, and cannot be adjusted or throttled. When the gate valve is closed, the sealing surface can be sealed only by the medium pressure, that is, relying on the medium pressure to press the sealing surface of the gate plate to the valve seat on the other side to ensure the sealing of the sealing surface, which is self-sealing. Most of the gate valve is forced seal, that is to say, when the valve is closed, the gate should be pressed to the valve seat by external force, so as to ensure the sealing surface sealing. Contents of the invention [0003] The purpose of the present invention is to overcome the shortcomings of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K3/02F16K3/30F16K41/02
CPCF16K3/0227F16K3/0281F16K3/30F16K41/02
Inventor 马骏刘成龙
Owner TIANJIN DINGJIN VALVE CO LTD
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