A kind of frozen pipe that can be pulled out and a matching pipe puller

Abstract

The present invention relates to a removable freezing pipe and a matching pipe extractor. The freezing pipe comprises a pipe body, one end of which is provided with a right-handed external thread, and the other end is provided with a right-handed internal thread matched with the right-handed external thread; a left-handed internal thread is provided inside the pipe body; at least two axial grooves are provided on the inner wall of one end of the right-handed internal thread of the pipe body, and the axial grooves are connected with the left-handed internal thread; the matching pipe extractor comprises a pulling device and a plurality of extension rods; the pulling device is detachably connected to the extension rod; the pulling device comprises a rod part and a working part, and the rod part is fixedly connected to the center of the working part; the working part is matched with the axial groove of the freezing pipe, and the edge of the working part is provided with a left-handed external thread, and the left-handed external thread is matched with the left-handed internal thread of the freezing pipe. Compared with the prior art, the present invention can realize the insertion of pipes during the drilling process and the pulling out of freezing pipes after the freezing project is completed; the freezing pipe can be pulled out at any time, the operation steps are simple, the time is shortened and the resource cost is saved.

Description

Technical Field

[0001] The invention relates to a removable freezing pipe and a matching pipe puller, belonging to the technical field of rock and soil support engineering. Background Art

[0002] The artificial freezing method is to install freezing pipes in the soil layer and circulate refrigerant in the freezing pipes to lower the temperature of the soil layer so that the soil body can be frozen. Therefore, the freezing pipe is the key to the freezing method. However, the freezing project is a temporary support project. After the main structure is completed, the freezing pipe will no longer play a role. However, since the freezing pipe is generally made of multiple screws, it rotates in the direction of thread tightening when drilled in, and the soil layer is in a soft state. When pulled out, the freezing pipe is already connected to the frozen soil, and the adhesion is significantly increased. At this time, if it is rotated in the original direction, the adhesion between the multiple sections of the freezing pipe and the frozen soil will have a cumulative effect, and the torque will even exceed the strength of the freezing pipe itself. If reverse rotation is adopted, it will cause disconnection, and the freezing pipe below will still remain in the soil body. Therefore, the prior art generally adopts the method of heating or abandonment.

[0003] However, the heating cost is high and it will damage the frozen soil structure, which is not worth the cost. Frozen pipes are generally made of low-carbon steel pipes. Abandoning the frozen pipes without pulling them out will not only cause a waste of resources, but also may affect the construction of other surrounding projects. Summary of the invention

[0004] The purpose of the present invention is to provide a removable frozen pipe and a matching pipe puller, which can realize the insertion of pipes during the drilling process and the pulling out of the frozen pipes after the freezing project is completed; the frozen pipes can be pulled out at any time, the operation steps are simple, the time is shortened and the resource cost is saved.

[0005] In order to achieve the above-mentioned purpose, the technical solution of the present invention is: to provide a pull-out freezing pipe, including a tube body, one end of the tube body is provided with a right-handed external thread, and the other end is provided with a right-handed internal thread matched with the right-handed external thread; the inside of the tube body is provided with a left-handed internal thread; the inner wall of one end of the right-handed internal thread of the tube body is provided with at least two axial grooves, and the axial grooves are connected to the left-handed internal thread.

[0006] Furthermore, the right-handed internal thread and the left-handed internal thread are arranged at intervals.

[0007] The present invention also provides a matching pipe pulling device, including a pulling device and a plurality of extension rods; the pulling device is detachably connected to the extension rods; the extension rods are detachably connected to each other; the pulling device includes a rod portion and a working portion, the rod portion is fixedly connected to the center of the working portion; the working portion is adapted to the axial groove of the freezing pipe, the edge of the working portion is provided with a left-handed external thread, and the left-handed external thread is adapted to the left-handed internal thread of the freezing pipe.

[0008] Furthermore, the extraction device is connected to the extension rod via a left-handed thread; and the extension rods are connected to each other via a left-handed thread.

[0009] The present invention also provides a method for using a removable frozen pipe and a matching pipe puller, comprising the following steps:

[0010] S1. The freezing pipe can be drilled by rotating it clockwise through the drilling rig;

[0011] S2. After a freezing pipe is drilled, the next freezing pipe is connected through threads and the drilling continues to the designed depth;

[0012] S3. When the frozen pipe needs to be pulled out, put the pipe puller into the frozen pipe and reach the left-hand thread through the axial groove inside the pipe body;

[0013] S4. The pipe puller is rotated counterclockwise by the drilling rig to pull out a section of frozen pipe;

[0014] S5. When pulling out a deep frozen pipe, add an extension rod to the pulling device to pull out the deep frozen pipe;

[0015] S6. Repeat steps S3 to S5 until the freezing pipe is completely pulled out.

[0016] Compared with the prior art, the present invention can realize the insertion of pipes during the drilling process and the extraction of frozen pipes after the freezing project is completed; the frozen pipes can be extracted at any time, the operation steps are simple, the time is shortened and the resource cost is saved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a three-dimensional structural diagram of the freezing pipe of the present invention;

[0018] Figure 2 It is a partial cross-sectional view of the three-dimensional structure of the matching tube extractor of the present invention;

[0019] Among them, 1-tube body; 11-right-handed external thread; 12-right-handed internal thread; 13-left-handed internal thread; 14-axial groove; 2-matching tube puller; 21-pulling device; 22-extension rod; 211-working part; 212-rod part; 213-left-handed external thread. DETAILED DESCRIPTION

[0020] In order to achieve the above-mentioned purpose and effect, the technical means and structures adopted by the present invention are described in detail with reference to the accompanying drawings for the features and functions of the preferred embodiments of the present invention.

[0021] Referring to the accompanying drawings, a removable freezing pipe includes a pipe body 1, one end of the pipe body 1 is provided with a right-handed external thread 11, and the other end is provided with a right-handed internal thread 12 matched with the right-handed external thread 11; the inside of the pipe body 1 is provided with a left-handed internal thread 13; the inner wall of one end of the right-handed internal thread of the pipe body 1 is provided with at least two axial grooves 14, and the axial grooves 14 are connected to the left-handed internal thread 13.

[0022] The right-handed internal thread 12 and the left-handed internal thread 13 are arranged at intervals.

[0023] The present invention also provides a matching pipe pulling device 2, including a pulling device 21 and a plurality of extension rods 22; the pulling device 21 is detachably connected to the extension rods 22; the extension rods 22 are detachably connected to each other; the pulling device 21 includes a rod portion 212 and a working portion 211, the rod portion 212 is fixedly connected to the center of the working portion 211; the working portion 211 is adapted to the axial groove 14 of the freezing pipe, and a left-handed external thread 213 is provided on the edge of the working portion 211, and the left-handed external thread 213 is adapted to the left-handed internal thread 13 of the freezing pipe.

[0024] The extraction device 21 is connected to the extension rod 22 via a left-handed thread; the extension rods 22 are connected to each other via a left-handed thread.

[0025] The present invention also provides a method for using a removable frozen pipe and a matching pipe puller, comprising the following steps:

[0026] S1. The freezing pipe can be drilled by rotating it clockwise through the drilling rig;

[0027] S2. After a freezing pipe is drilled, the next freezing pipe is connected through threads and the drilling continues to the designed depth;

[0028] S3. When the frozen pipe needs to be pulled out, put the pipe puller into the frozen pipe and reach the left-hand thread through the axial groove inside the pipe body;

[0029] S4. The pipe puller is rotated counterclockwise by the drilling rig to pull out a section of frozen pipe;

[0030] S5. When pulling out a deep frozen pipe, add an extension rod to the pulling device to pull out the deep frozen pipe;

[0031] S6. Repeat steps S3 to S5 until the freezing pipe is completely pulled out.

[0032] The above descriptions are only preferred embodiments of the present invention, not all embodiments. Anyone should be aware that any structural changes made under the inspiration of the present invention, and any technical solutions that are the same or similar to the present invention, belong to the protection scope of the present invention.

Claims

1. A method for using a removable freezing pipe, comprising a removable freezing pipe and a matching pipe puller; The removable freezing pipe comprises a pipe body, one end of which is provided with a right-handed external thread, and the other end is provided with a right-handed internal thread matched with the right-handed external thread; the interior of the pipe body is provided with a left-handed internal thread; the inner wall of the end of the pipe body provided with the right-handed internal thread is provided with at least two axial grooves, and the axial grooves are connected with the left-handed internal thread; the right-handed internal thread and the left-handed internal thread are arranged at intervals; The matching pipe extractor comprises a pulling device and a plurality of extension rods; the pulling device is detachably connected to the extension rods; the extension rods are detachably connected to each other; the pulling device comprises a rod portion and a working portion, the rod portion is fixedly connected to the center of the working portion; the working portion is adapted to the axial groove of the freezing pipe, the edge of the working portion is provided with a left-handed external thread, the left-handed external thread is adapted to the left-handed internal thread of the freezing pipe; the pulling device is connected to the extension rods via left-handed threads; the extension rods are connected via left-handed threads; The following steps are also included: S1. Use the drilling rig to rotate the freezing pipe in clockwise direction to achieve freezing pipe drilling; S2. After a freezing pipe is drilled, the next freezing pipe is connected through threads and the drilling continues to the designed depth; S3. When the frozen pipe needs to be pulled out, put the pipe puller into the frozen pipe and reach the left-hand thread through the axial groove inside the pipe body; S4. The pipe puller is rotated counterclockwise by the drilling rig to pull out a section of frozen pipe; S5. When pulling out a deep frozen pipe, add an extension rod to the pulling device to pull out the deep frozen pipe; S6. Repeat steps S3 to S5 until the freezing pipe is completely pulled out.

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