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Tank vehicle mounted breathing type safety valve

A safety valve and tank truck technology, applied in safety valves, balance valves, valve devices, etc., can solve the problems of poor stability and reliability, limited suction volume, etc., achieve high reliability, increase suction area, and return accurately Effect

Active Publication Date: 2009-07-08
XI AN RAILWAY TRANSPORTATION EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The purpose of the present invention is to provide a breathing safety valve for tank trucks, which solves the technical problems of limited suction volume, poor operation stability and reliability in the background technology

Method used

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  • Tank vehicle mounted breathing type safety valve

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Embodiment Construction

[0034] See attached figure 1 , the upper end of the barrel-shaped valve body 1 of the present invention is provided with a bonnet 8, the bonnet 8 can be threadedly connected with the valve body 1 through an internal thread or an external thread, and a bonnet lock nut 5 is provided at the joint between the bonnet 8 and the valve body 1 It is appropriate. When the quality of the medium is required to be high, a dust-proof net 13 can be provided at the bottom of the valve body 1 to prevent dust from accumulating, so as to ensure the reliability and tightness of the exhalation operation. The exhalation valve disc 2 is arranged in the valve body 1 and is in clearance fit with the valve body 1 . If the gap is small, the disc is prone to jamming; if the gap is large, it is easy to vibrate and the suction flow is limited. The gap between the exhalation valve disc 2 and the valve body 1 can be 0.08-0.25mm. The gap between the exhaled disc 2 and the valve body 1 is preferably 0.1-0.2...

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Abstract

The invention relates to a breathing safety valve for a railway tank car. There is an exhalation disc in the valve body, the exhalation spring is embedded between the valve cover and the exhalation disc, the gap between the inhalation disc and the exhalation disc is provided with a suction valve sealing ring, the guide shaft is in contact with the guide sleeve, and the inhalation spring seat It is arranged at the outer end of the guide shaft of the inhalation valve disc, and the inhalation spring is embedded between the guide sleeve at the center of the exhalation valve disc and the inhalation spring seat. The sealing surface of the clearance fit between the exhalation disc and the valve body is a plane, and the fit clearance is 0.08-0.25mm. The guide height h of the exhalation valve flap is 11-21mm. The sealing surface of the clearance fit between the exhalation valve disc and the valve body and the lower end surface of the inhalation valve disc can be located on the same plane, or higher than the lower end surface of the inhalation valve disc, which solves the technical problem of limited inhalation volume. The invention has good running stability and reliability, and the suction pressure is convenient to adjust.

Description

technical field [0001] The invention relates to a breathing safety valve, in particular to a breathing safety valve for a railway tank car. Background technique [0002] At present, the breathing safety valve used by my country's general railway tank cars is the HT272-00-91 breathing safety valve designed in 1960. As the technical development of railway tank cars tends to be high-speed and heavy-loaded, the breathing safety valve of HT272-00-91 can no longer meet the safety needs of railway tank cars. The specific disadvantages are as follows: [0003] 1. Unreasonable selection of parameters during spring design causes the deformation of the spring to exceed 80% of the test deformation during valve operation, which seriously affects the stability of the exhalation pressure of the breathing valve. [0004] 2. The inhaled air flow is long, and the direction of the air flow needs to be turned 180 degrees. The frictional resistance of the air flow is relatively large, which di...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K17/196
Inventor 韩志坚郭小锋郑国忠侯军卢奎刚胡广寿肖卫金耀辉于从立
Owner XI AN RAILWAY TRANSPORTATION EQUIP
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