A liquid nitrogen freezer and processing method for vertical compartmental freezing

A technology of freezer and liquid nitrogen, which is applied in infrastructure engineering, soil protection, construction, etc., can solve the problems of poor uniformity of frozen walls, difficult control, and inability to accurately control the development of frozen soil, and achieve uniform freezing effects

CN109763481BActive Publication Date: 2020-02-21CHINA UNIV OF MINING & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2020-02-21

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Abstract

The invention relates to a liquid nitrogen freezing apparatus adopting vertical partitioning and a using method, which are applicable to the technical field of artificial freezing in the underground engineering. The liquid nitrogen freezing apparatus comprises a freezing pipe which is of a columnar structure; a freezing pipe base cone is arranged at the bottom of the freezing pipe; a liquid supplypipe is arranged in the freezing pipe; a plurality of liquid spraying holes are formed on the side wall of the liquid supply pipe; the bottom of the liquid supply pipe is sealed and a small liquid spraying hole is formed at the bottom of the liquid supply pipe; a gas outlet pipe is arranged at one side of the liquid supply pipe; freezing pipe inner chutes matched with rib plates in number and position are formed on the inner wall of the freezing pipe; the vertical rib plate is arranged between each freezing pipe inner chute and the outer wall of the liquid supply pipe; the rib plates are adjustable in width size; a position of the liquid supply pipe in the freezing pipe can be accurately controlled; liquid nitrogen sprayed from the liquid spraying holes is independently gasified among therib plates; freezing effects at different positions can be controlled by regulating a liquid spraying amount, so that a development range of frozen soil in different directions outside the freezing pipe is accurately controlled; and the liquid nitrogen freezing apparatus fulfills the aims of improving freezing quality, saving the use amount of the liquid nitrogen, reducing freezing time and controlling frost-heave capacity, and is simple to produce and good in processing property.
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Description

technical field

[0001] The invention relates to a liquid nitrogen freezer for freezing in vertical bins and a processing method, and is especially suitable for a liquid nitrogen freezer for freezing in vertical bins used in the technical field of artificial freezing in underground engineering. Background technique

[0002] The artificial freezing method uses artificial refrigeration technology to freeze the water in the formation, turn the natural rock and soil into frozen soil, increase its strength and stability, and isolate the connection between groundwater and underground engineering, so that construction can be carried out under the protection of the frozen wall. There are two commonly used freezing methods, one is brine freezing and the other is liquid nitrogen freezing. Both methods have their own advantages and disadvantages. Liquid nitrogen quick freezing is often used in emergency construction. Using liquid nitrogen as a refrigerant can achieve a low temperature t...

Examples

Embodiment Construction

[0022] An embodiment of the present invention will be further described below in conjunction with accompanying drawing

[0023] Such as figure 1 As shown, the liquid nitrogen freezer for freezing in vertical bins according to the present invention includes a freezing tube 1 with a columnar structure. The liquid supply pipe 2 of the freezing pipe 1 is provided with a plurality of spray holes 3 on the side wall of the liquid supply pipe 2, the bottom of the liquid supply pipe 2 is sealed and is provided with a plug 5, and one side of the liquid supply pipe 2 at the top of the freezing pipe 1 is provided with There is the air outlet pipe 9 connected with the frozen pipe 1 mile, such as figure 2 As shown, the inner wall of the freezing pipe 1 is axially provided with a freezing pipe inner chute 10 matching the number and position of the rib plate 4, and vertical ribs are arranged between each freezing pipe inner chute 10 and the outer wall of the liquid supply pipe 2 The plate ...