Freezer capable of achieving staged freezing and staged freezing method

A freezing method and freezer technology, which are used in earth-moving drilling, shaft equipment, mining equipment, etc., can solve the problems of unfavorable advance excavation and lower excavation, and difficulty in adjustment, so as to reduce the total cost of freezing and reduce hole-making. The effect of reducing the amount of construction and civil construction costs

Active Publication Date: 2020-07-03
BEIJING CHINA COAL MINE ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The long and short leg freezing can realize the early excavation of the wellbore by densifying the freezing holes in the upper parts that need to be frozen; however, when the deep part of the wellbore is frozen, the depth of some frozen holes will be shortened, which is equivalent to reducing the number of frozen holes. Difficult to adjust when finished, no remedy if "open su

Method used

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  • Freezer capable of achieving staged freezing and staged freezing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example 1 Freezer capable of stage freezing

[0032] The freezer capable of stage freezing of this embodiment includes a liquid distribution ring 1, a liquid collecting ring 2, a tee, a freezing pipe 3, an upper freezing liquid supply and a lower freezing liquid return pipe 4 and a lower freezing liquid supply pipe 5.

[0033] The bottom ends of the upper freezing supply and lower freezing return pipe 4 and the lower freezing supply pipe 5 extend into the freezing pipe 3 along the axis of the freezing pipe 3, and the upper freezing supply and The upper ends of the lower freezing liquid return pipe 4 and the lower freezing liquid supply pipe 5 extend out of the top of the freezing pipe 3; the distance between the bottom end of the lower freezing liquid supply pipe 5 and the bottom of the freezing pipe 3 is smaller than that of the upper section The distance between the freezing liquid supply and the lower freezing liquid return pipe 4 and the bottom of the freezing pipe 3; th...

Embodiment 2

[0054] The freezer described in Example 1 which can realize staged freezing is used to freeze the ground in stages.

[0055] The specific freezing method is as follows:

[0056] 1. When the upper freezing is carried out, open the first three-way valve 9 and the second valve 11, close the first valve 8 and the second three-way valve 10, so that the low-temperature salt water passes through the dosing ring 1 through the first end 12- 1. The third end of the tee 12-3 flows into the upper frozen liquid supply and the lower frozen liquid return pipe 4, enters the staged freezing interface, and then rises along the annular space of the freezing pipe 3, and then passes through the upper frozen liquid return pipe 6, The liquid collecting pipe 2-1 flows back to the liquid collecting ring 2, realizing the freezing of the upper section.

[0057] 2. When the lower part is frozen, open the first valve 8 and the three-way second valve 10, close the three-way first valve 9 and the second valve 11,...

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Abstract

The invention discloses a freezer capable of achieving staged freezing and a staged freezing method. The freezer comprises a liquid distribution ring, a liquid collection ring, a tee joint, a freezingpipe, an upper-section frozen liquid supply and lower-section frozen liquid return pipe, and a lower-section frozen liquid supply pipe. The bottom ends of the upper-section frozen liquid supply and lower-section frozen liquid return pipe and the lower-section frozen liquid supply pipe extend into the freezing pipe along the axis of the freezing pipe, and the upper ends of the upper-section frozenliquid supply and lower-section frozen liquid return pipe and the lower-section frozen liquid supply pipe extend out of the top end of the freezing pipe. The distance between the bottom end of the lower-section freezing liquid supply pipe and the bottom of the freezing pipe is smaller than the distance between the upper-section frozen liquid supply and lower-section frozen liquid return pipe andthe bottom of the freezing pipe. By staged freezing, the demand for chilling requirement can be reduced, the number of equipment in a freezing station can be reduced, the equipment installation work can be reduced, the floor area of the freezing station can be reduced, the civil construction cost of the freezing station can be reduced, and the total freezing cost can be reduced. By staged freezing, the cooling capacity can be rationally used, the freezing of the upper part of a shaft can be accelerated, and the early excavation of the shaft can be achieved.

Description

Technical field [0001] The invention relates to the technical field of a freezing device when sinking a shaft with a freezing method in a coal mine tunnel. Specifically, it is a freezer and method for freezing by stages. Background technique [0002] Freezing sinking is a construction method that uses artificial refrigeration technology to temporarily reinforce unstable formations and isolate groundwater. The freezing method is suitable for loose and unstable alluvial strata, fractured water-bearing rock formations, soft mudstones, and rock formations with particularly high water content and water pressure. It can be used as a regular construction method for mine projects with complex geological conditions, and also as a means of engineering rescue and accident treatment. It is widely used in the construction of vertical shafts, inclined shafts, and horse head gates in coal mine tunnel projects, and has been used in construction Subways, bridges and culverts, large-volume under...

Claims

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Application Information

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IPC IPC(8): E21D1/14
CPCE21D1/14
Inventor 赵玉明周华群李功洲李方政王恒王婧娟杨明红张基伟
Owner BEIJING CHINA COAL MINE ENG CO LTD
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