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Cryogenic Distribution Box

Cryostat

Cryogenic Distribution Box

Cryogenic Distribution Box

  • Categories:Cryostat
  • Time of issue:2020-04-20 00:00:00
  • Views:0
Description:
Description:
Information

Introduction
In the field of superconducting accelerator, a cryogenic distribution system or cryogenic distribution valve box, is arranged between the cryogenic system and the terminal equipment. Its main function is to distribute the cryogenic liquid generated by the cryogenic system to various terminal devices through the cryogenic insulation pipelines, so as to meet the control requirements of different terminal devices on the flow, pressure, temperature, liquid level and other parameters of cryogenic liquid.
The cryogenic distribution valve box is mainly composed of vacuum vessel, liquid nitrogen cold shield, pipeline system, various regulating valves, heat exchanger, temperature, pressure, liquid level and other measurement and control devices. The vacuum vessel provides high vacuum insulation for the internal cryogenic components. In order to reduce the radiation from room temperature to the cryogenic components, the liquid nitrogen cold shield is usually adopted copper or aluminum with winding copper or aluminum pipe welded on the surface; all kinds of regulating valves adjust the opening degree of the valve according to the signal of sensors such as liquid level sensor, pressure sensor, etc., so as to achieve the purpose of adjusting the relevant parameters of cryogenic liquid.


Features
The cover plate of vacuum vessel of cryogenic distributing valve box is designed with various kinds of regulating valves and inlet and outlet liquid pipes, which are compact in structure. All kinds of control valves are famous brands with reliable and stable performance. The pipes with different diameters in the vacuum vessel shall be bent and formed by special elbow device to avoid elbow welding so as to reduce the cold leakage at low temperature. For large cryogenic distribution valve box, the liquid nitrogen cold shield adopts aluminum welding liquid nitrogen coil to make sure easy installation and debugging.


Function
Cryogenic distribution valve box is widely used in the field of superconducting accelerator, used for the distribution of cryogenic fluid to terminal equipment. According to the working requirement of terminal equipment, it controls the temperature, pressure, flow or liquid level of cryogenic fluid.


Specifications

 

Contents

Specification

Applicable medium

LHe、GHe、LN2、GN2

Operating temperature

1.8~4.2k,80K

Design pressure

According to system requirements

Insulation method

High vacuum + multiple layers insulation

Vacuum leak rate

≤1×10-10pa.m3/s

Working vacuum degree

Better than1×10-3pa

Cryogenic Distribution Box

 

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