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Bilateral sealing stop valve

A shut-off valve and sealing plug technology, applied in the field of opposite sealing shut-off valves, can solve the problems of gas leakage, safety performance, resource saving, environmental protection impact, metering wire damage, etc.

Active Publication Date: 2012-02-15
CHAOYANG JIAHUA ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the pressure vessel liquid level gauges installed in the domestic and foreign petrochemical industry do not have ideal sealing stop valves. Even if there are, they are one-way. There are different degrees of gas leakage, which has a great impact on safety performance, resource conservation, and environmental protection.

Method used

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Examples

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Embodiment Construction

[0015] Such as Figure 1~2 As shown, the main structure of the present invention includes a valve body 12 with a connecting flange 21, an orifice 11 and a spool hole and a spool with external threads, and the orifice 11 is arranged on the longitudinal centerline of the valve body 12 The upper and lower spool holes are arranged on the transverse center line of the valve body 12, and the left spool 9 and the right spool 13 are arranged symmetrically in the spool holes on both sides of the orifice, and in the spool hole at the front end of the spool sealing plug. A front sealing assembly 10 is provided, and the front sealing assembly includes an elastic element I1001, an elastic element, a pressure pad 1002, a support member 1003 and an elastic element II1004. In order to ensure that the shut-off valve forms a secondary safety seal to the valve core when it is opened to the maximum position, a rear seal 8 is provided in the valve core hole at the rear end of the valve core sealin...

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Abstract

The invention relates to a bilateral sealing stop valve which comprises a valve body and valve elements. The stop valve adopts the technical essentials that a throttling orifice is arranged on the longitudinal central line of the valve body, and the valve elements are arranged on the transverse central line of the valve body; the valve elements are symmetrically arranged in valve element holes attwo sides of the throttling orifice; the valve element hole at the front end of a valve element sealing stop is internally provided with a sealing assembly; a positioning body and a nut are sleeved outside the valve elements at two ends of the valve element holes and fixed on the valve body through a fixing press cap; a hand wheel which is clamped by a flat key and fixed by a jam nut is sleeved outside the nut, and a valve element gear is arranged outside the nut between the hand wheel and the fixing press cap; the valve body is connected with a bearing block through a bolt, and the bearing block is internally provided with a slide bearing; a transmission shaft is fixed on the bearing block through the slide bearing; and two ends of the transmission shaft are provided with a transmission shaft gear engaged with the valve element gear. The invention has the advantages of flexible and compact structure, exact and accurate sealing, good sealing quality and low manufacturing cost and is an important improvement for the safety performance of a float type liquid level metering system of a pressure container.

Description

technical field [0001] The invention relates to the technical field of safety sealing shut-off valves, in particular to a counter-sealed shut-off valve used in the petrochemical industry for compressing flammable gas float-type liquid level gauges. Background technique [0002] Liquid level measurement of condensed flammable, explosive liquid and gas containers is a major difficulty in the petrochemical industry. The difficulty lies in not only measuring the liquid and gas stock in the container, but also ensuring absolute high safety. Once a danger occurs, the consequences will be extremely serious. The float type liquid level gauge is an effective means to measure the liquid level height and stock of the pressure vessel. The float moves up and down with the change of the liquid level, and the float moves the measuring wire to drive the measuring device. The function of the opposite sealing stop valve is: first, when the installation of the liquid level gauge measuring mec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K3/00F16K31/60F16K31/53F16K27/04
Inventor 刘万更王森陈孝东张晶
Owner CHAOYANG JIAHUA ELECTRONICS
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