Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
The invention relates to the technical field of liquid nitrogen freezing, in particular to a liquid nitrogen differential freezer. According to the design of the freezer, a traditional cylindrical freezing pipe is optimized into a multi-diameter stepped freezing pipe, a liquid supply pipe is placed in the center of the freezing pipe, and symmetrical through holes are formed in the two sides of the freezing pipe, so that liquid nitrogen is vaporized, heat of surrounding soil layers is absorbed, soil is frozen, and a frozen soil curtain is formed. However, due to the fact that liquid nitrogen can cause cooling capacity loss in the backflow process, the cooling capacity above the freezing pipe is lower than the bottom of the freezing pipe, the diameter of the freezing pipe above is increased, the contact area of the freezing pipe and soil is increased, and the liquid nitrogen refrigeration efficiency is improved; and finally, the liquid nitrogen is discharged through the gas outlet pipe, and the step-shaped frozen soil curtain is formed in the stratum through circulation.
本发明涉及液氮冻结技术领域，特别涉及一种液氮差异冻结器。在冻结器的设计上，将传统的圆柱体冻结管优化为多直径、阶梯状的冻结管，在其中心放入供液管，其两侧开凿对称通孔，供液氮汽化，吸收周围土层的热量，使土壤冻结，形成冻土帷幕。但由于液氮在回流过程中会造成冷量损失，致使冻结管上方冷量低于冻结管底部，故将上方冻结管直径变大，使冻结管与土壤接触面积增大，提高液氮制冷效率；最后，液氮经出气管排出，如此循环在地层中形成阶梯状冻土帷幕。
The invention relates to the technical field of liquid nitrogen freezing, in particular to a liquid nitrogen differential freezer. According to the design of the freezer, a traditional cylindrical freezing pipe is optimized into a multi-diameter stepped freezing pipe, a liquid supply pipe is placed in the center of the freezing pipe, and symmetrical through holes are formed in the two sides of the freezing pipe, so that liquid nitrogen is vaporized, heat of surrounding soil layers is absorbed, soil is frozen, and a frozen soil curtain is formed. However, due to the fact that liquid nitrogen can cause cooling capacity loss in the backflow process, the cooling capacity above the freezing pipe is lower than the bottom of the freezing pipe, the diameter of the freezing pipe above is increased, the contact area of the freezing pipe and soil is increased, and the liquid nitrogen refrigeration efficiency is improved; and finally, the liquid nitrogen is discharged through the gas outlet pipe, and the step-shaped frozen soil curtain is formed in the stratum through circulation.
本发明涉及液氮冻结技术领域，特别涉及一种液氮差异冻结器。在冻结器的设计上，将传统的圆柱体冻结管优化为多直径、阶梯状的冻结管，在其中心放入供液管，其两侧开凿对称通孔，供液氮汽化，吸收周围土层的热量，使土壤冻结，形成冻土帷幕。但由于液氮在回流过程中会造成冷量损失，致使冻结管上方冷量低于冻结管底部，故将上方冻结管直径变大，使冻结管与土壤接触面积增大，提高液氮制冷效率；最后，液氮经出气管排出，如此循环在地层中形成阶梯状冻土帷幕。
Liquid nitrogen differential freezer
一种液氮差异冻结器
RONG CHUANXIN (Autor:in)
27.05.2022
Patent
Elektronische Ressource
Chinesisch
IPC:
E02D
FOUNDATIONS
,
Gründungen
Segmented control type liquid nitrogen freezer and working method
| Europäisches Patentamt | 2020