A high temperature molten salt pipeline valve

A pipeline valve, high temperature molten salt technology, applied in the direction of lift valve, valve details, valve device, etc., can solve the problems of graphite packing gasification, stuffing box leakage, etc., to improve sealing, good practicability and adaptability. Effect

Active Publication Date: 2020-10-09
SHANGHAI SUBNUCLEAR VALVE IND COMPLETE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] When the valve is in use, the high-temperature and high-pressure molten salt in the liquid phase will produce a radial thrust on the valve stem, and the molten salt medium can enter the valve stuffing box along the small gap between the bracket and the valve stem, and the high-temperature molten salt will The graphite filler in the stuffing box is vaporized, causing the stuffing box to leak, and the existing technology can be improved

Method used

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  • A high temperature molten salt pipeline valve
  • A high temperature molten salt pipeline valve
  • A high temperature molten salt pipeline valve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] to combine figure 1 and figure 2 As shown, a high-temperature molten salt pipeline valve includes a bracket 1 and a valve body 2 installed on the bracket 1, and a chamber 3 is formed in the valve body 2, and a valve is installed vertically in the bracket 1 and the valve body 2. The stem 4 is connected with the valve core 5 protruding into the chamber 3 . In the process of using the valve, the high-temperature liquid-phase molten salt medium will exert a thrust on the valve stem 4 along the direction of medium flow, and a small gap will be formed between the valve stem 4 and the bracket 1 under the action of the thrust; while the high-temperature liquid-phase molten salt The salt medium can enter the stuffing box 6 along the tiny gap between the valve stem 4 and the bracket 1, contact with the graphite packing in the stuffing box 6 and vaporize the graphite packing, causing the stuffing box 6 to leak. Therefore, in the present invention, the valve stem 4 is set as a m...

Embodiment 2

[0050] to combine figure 1 and image 3 As shown, a high-temperature molten salt pipeline valve differs from Embodiment 1 in that the upper valve stem 41 is configured as a multi-segment rod structure (in this embodiment, it is a two-segment upper valve stem 41). The upper valve stem 41 includes a plurality of connecting valve stems 9 that are snap fit and realize transmission (the joint connecting the valve stem 9 is located between the sliding bearing and the mechanical seal structure 7), and two adjacent valve stems after snap fit There is a transmission weakening gap formed between the connecting valve stems 9; when the radial thrust acting on the valve core 5 is relatively large, the thrust is transmitted to the connection along the lower valve stem 42 and weakened by the thrust weakening gap, there is still a small amount of thrust Acting on the connecting valve rod 9 connected with the lower valve rod 42, a small amount of thrust is further weakened through the transmi...

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Abstract

The invention discloses a high-temperature molten salt pipeline valve, and relates to the technical field of valves. The high-temperature molten salt pipeline valve comprises a support and a valve body, wherein a valve rod is vertically and rotatably arranged in the support and the valve body and comprises a lower-section valve rod connected with a valve element; an upper-section valve rod is connected to the lower-section valve rod; an installation head is arranged on the lower-section valve rod; a clamping head is arranged on the upper-section valve rod; and a thrust compensation gap is formed between the installation head and the clamping head after clamping fit. During the use process of the valve, the lower-section valve rod bears the radial thrust of a molten salt medium, and the thrust is upwards conducted to the connecting part of the lower-section valve rod and the lower-section valve rod along the lower-section valve rod; and due to the existence of the thrust compensation gap between the installation head and the clamping head, less or no thrust conducted to the connecting part can be conducted to the upper-section valve rod. By adopting the multi-section clamping-fit valve rod structure, the gap between the upper-section valve rod and the support is small, so that the upward movement of the molten salt medium can be effectively prevented, and the contact of the high-temperature molten salt medium and a graphite packing at a stuffing box part is avoided.

Description

technical field [0001] The invention relates to the technical field of valves, in particular to a high-temperature molten salt pipeline valve. Background technique [0002] The valve is a pipeline accessory used to control the opening and closing of the pipeline, control the flow direction, adjust and control the parameters (temperature, pressure and flow) of the conveying medium. Valves can be used to control the flow of various types of fluid media such as air, water, steam, various corrosive media, mud, oil, liquid metal radioactive media, etc. [0003] Molten salt, the molten body formed after the melting of salts, such as the molten body of halides, nitrates, and sulfates of alkali metals and alkaline earth metals. Molten salt is a salt that is solid at standard temperature and atmospheric pressure, but liquid when the temperature rises. [0004] In the prior art, the valve usually includes a bracket and a valve body, the bracket and the valve body are rotatably provi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K1/226F16K41/02
Inventor 杨志聪黄军
Owner SHANGHAI SUBNUCLEAR VALVE IND COMPLETE CO LTD
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