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a purge valve

A purge valve and valve body technology, which is applied in the field of purge valves, can solve the problems that the sealing structure of ordinary three-way valves cannot meet the process requirements of ammonium nitrate, and achieve the effects of reliable sealing performance, fluid leakage prevention, and convenient repair and maintenance

Active Publication Date: 2020-02-28
BEIJING RAYMOND FLUID EQUIP ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] However, the sealing structure of ordinary three-way valves cannot meet the technological requirements in the production process of ammonium nitrate

Method used

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Embodiment Construction

[0034] Various embodiments of the invention will be described in more detail below with reference to the accompanying drawings. In the various drawings, the same elements are denoted by the same or similar reference numerals. For the sake of clarity, various parts in the drawings have not been drawn to scale.

[0035] image 3 It is a schematic diagram of the internal structure of the purge valve of the present invention.

[0036] Such as image 3 As shown, the purge valve 100 provided by the present invention includes a valve body 110, a valve cover 120, a valve ball 130, a valve stem 140, an actuator 150 and an end cover. The valve cover 120 encapsulates the valve ball 130 to the Inside the valve body 110, the valve stem 140 passes through the valve cover 120, one end is connected to the valve ball 130 inside the valve body 110, and the other end is connected to the actuator 150 outside the valve body 110. Connection, preferably, the valve stem 140 is a top-mounted struc...

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Abstract

The invention relates to a purge valve, comprising a valve body, a valve cover, a valve ball, a valve seat, a valve stem and an end cover, the valve cover encapsulates the valve ball inside the valve body, and the valve stem passes through the The valve cover, one end is connected to the valve ball inside the valve body, the other end is located outside the valve body, the valve seat is arranged between the valve ball and the valve body, at least one of the end caps A backstop sealing structure is provided, and multiple sealing structures are provided between the valve cover, the valve seat and the valve body. In the present invention, a backstop sealing structure is arranged at the port connected to the pipeline of the ammonium nitrate system to prevent ammonium nitrate from flowing into the valve body to cause corrosion to the valve body or other pipelines, and to prevent the corrosion of the valve body or other pipelines caused by ammonium nitrate flowing into the valve body. Multiple sealing structures are set between them, and the multiple hierarchical sealing structures can ensure a longer service life of the purge valve and more reliable sealing performance. Moreover, the first end cap can also be used alone, which can prevent fluid leakage in the pipeline of the ammonium nitrate system and facilitate the repair and maintenance of other parts of the purge valve.

Description

technical field [0001] The invention relates to a switching valve used in the chemical industry such as ammonium nitrate, in particular to a purge valve. Background technique [0002] In the process of ammonium nitrate production, after the ammonium nitrate production process system is shut down, the pipeline system needs to be purged and pigged with steam. Every time it is shut down, the pipe must be purged and pigged once. The process system is as attached figure 1 Shown: [0003] Ⅰ: When the ammonium nitrate production line at the left end is shut down, its production process is as follows: [0004] 1. After the pressure of the ammonium acid pipeline drops to zero, a small part of the nitric acid medium remains in the pipeline. [0005] 2. The A port of the three-way valve 1 is connected to the B port, and the D port is closed; the B and C ports of the two-way ball valve 2 are connected, and the steam at the C port of the two-way ball valve 2 enters the ammonium nitrate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K15/18F16K15/06F16K11/087
CPCF16K11/087F16K15/063F16K15/1848
Inventor 龚友波阎昌福陈双聘
Owner BEIJING RAYMOND FLUID EQUIP ENG CO LTD