Casing antifreeze device

Abstract

The invention discloses a casing pipe defroster. The casing pipe defroster is designed by abandoning a casing pipe freeze protection method of injecting butter into a casing pipe and manufacturing the casing pipe into a through hole, breaking a traditional design philosophy of water plugging and water discharging, and adopting a brand new philosophy of deformation pressure relief. The casing pipe defroster comprises an anti-freezing block, wherein the anti-freezing block has the properties of being elastic and having no water absorption, when under pressure, the volume of the anti-freezing block shrinks, and the anti-freezing block absorbs the pressure, and when the pressure disappears, the volume of the anti-freezing block recovers to the original state, and furthermore when works under low outdoor temperature, the anti-freezing block still has the properties of being elastic and having no water absorption. The anti-freezing block firstly occupies a part of space inside the casing pipe after being placed at the bottom of the interior of the casing pipe, and volume expansion generated due to icing of water is counteracted through volume shrinkage deformation generated when the anti-freezing block is under the pressure, and accordingly the casing pipe is free of functions of frost heaving pressure, and furthermore when ice blocks thaw, volume deformation of the anti-freezing block can timely disappear, and the anti-freezing block still has a good freeze protection function even under the circumstance of repeated freezing and thawing.

Description

technical field [0001] The invention relates to an antifreeze device, in particular to a casing antifreeze device. Background technique [0002] It is a common problem in engineering that water enters or retains water in the casing used for bolt installation, and it is difficult to clean the water out of the casing after the water enters. When the temperature drops, the water in the casing is easy to freeze, and the volume will decrease after freezing. In a closed space, the volume expansion force when water freezes will directly act on the casing wall. If the pressure is too large, it will cause engineering defects such as casing cracking. In the railway field, due to the open-air use of railways , The pre-embedded casing of the fastener is easy to enter water and be cracked by freezing. [0003] In order to solve the problem of frost heaving of casing water, the common method is to use the method of casing oil injection to realize its water blocking function, that is, inj...

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Problems solved by technology

[0011] In order to overcome the above-mentioned problems, the present inventor has carried out intensive research, and found that both water blocking and drainage are not perfect, so he abandoned the practice of injecting butter and making the casing into a through hole, breaking the traditional idea of ​​water blocking and drainage , using a new method of "deformation and pressure relief", the specific process is to design a casing antifreeze device, the casing antifreeze device includes antifreeze blocks, wherein the antifreeze block has the characteristics of elasticity and non-water absorption, and its volume will decrease when it is under pressure Shrink, absorb the pressure, when the pressure disappears, the volume will return to its original shape, and when the antifreeze block works at a very low outdoor temperature, it still has the above characteristics; put the antifreeze block at the bottom of the casing to occupy a part of the casing Space, through the volume shrinkage and deformation of the antifreeze block when it is under pressure to offset the volume expansion caused by the freezing of water, so that the casing is not affected by the frost heave pressure, and when the ice block melts, the volume of the antifreeze block is deformed It can be recovered in time, even under the situation of repeated freezing and thawing, it still has a good antifreezing effect, thereby completing the present invention

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