Freezing pipe capable of being pulled out and matched pipe puller

Abstract

The invention relates to a freezing pipe capable of being pulled out and a matched pipe puller. The freezing pipe comprises a pipe body, one end of the pipe body is provided with a right-handed rotation external thread, and the other end of the pipe body is provided with a right-handed rotation internal thread matched with the right-handed rotation external thread; a left-hand rotation internal thread is formed in the pipe body; at least two axial grooves are formed in the inner wall of one end of the right-hand rotation internal thread of the pipe body and connected with the left-hand rotation internal thread; the matched pipe puller comprises a pulling-out device and a plurality of lengthening rods; the pulling-out device is detachably connected with the lengthening rods; the pulling-outdevice comprises a rod part and a working part, and the rod part is fixedly connected with the center of the working part; and the working part is matched with an axial groove of the freezing pipe, and a left-hand rotation external thread is arranged on the edge of the working part and matched with the left-hand rotation internal thread of the freezing pipe. Compared with the prior art, pipe inserting in the drilling process and pulling-out of the freezing pipe after freezing engineering is completed can be achieved; and the freezing pipe can be pulled out at any time, operation steps are simple, time is shortened, and resource cost is saved.

Description

technical field [0001] The invention relates to a pull-out freezing pipe and a matching pipe puller, belonging to the technical field of rock and soil support engineering. Background technique [0002] The artificial freezing method is to set up freezing pipes in the soil layer and circulate the refrigerant in the freezing pipes to reduce the temperature of the soil layer to freeze the soil. Therefore, the freezing pipes are the key to the freezing method. However, freezing engineering is a kind of temporary support engineering. After the main structure is completed, the freezing pipe will no longer play a role. However, since the frozen pipe is generally made of multiple screws, it is rotated according to the direction of thread tightening when drilling, and the soil layer is in a soft state. At this time, if the original direction is rotated, the adhesion between the multi-section frozen pipe and the frozen soil will have a cumulative effect, and the torque will even exce...

AI Technical Summary

Problems solved by technology

However, since the frozen pipe is generally made of multiple screws, it is rotated according to the direction of thread tightening when drilling, and the soil layer is in a soft state. At this time, if the original direction is rotated, the adhesion between the multi-section frozen pipe and the frozen soil will have a cumulative effect, and the torque will even exceed the strength of the frozen pipe itself. In the soil, so the method of heating or discarding is generally adopted in the prior art

[0003] But the heating cost is high, and it will damage the permafrost structure, so the gain outweighs the gain; the freezing pipe is generally made of low-carbon steel pipe, and the freezing pipe is not pulled out when it is discarded. On the one hand, it will cause waste of resources, and on the other hand, it may affect the construction of other surrounding projects.

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