Novel drill rod aeration device

Abstract

The utility model relates to the technical field of spiral drilling machines, in particular to a novel drill rod air wrapping device which comprises a lower flange plate, an outer air wrapping pipe, a positioning component and a sealing ring. A concave air groove is formed in the lower flange plate, sealing rings are arranged on the two sides of the concave air groove, the outer wrapping air pipe is arranged on the concave air groove in a sleeved mode, two through holes connected with the circle center are formed in the concave air groove, and input holes matched with the two through holes are formed in the outer wrapping air pipe. By means of the device, soil or rock chippings drilled at the contact position of the drill bit and the drilling face can be blown away through high-pressure gas in the drill rod, the friction force between the drill bit and the contact face is increased, and the drilling efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of long auger drills, in particular to a novel drill pipe air bag device. The application of this device can blow away the soil or rock debris drilled at the contact position between the drill bit and the drilling surface through high-pressure gas inside the drill pipe, increase the friction between the drill bit and the contact surface, and improve the drilling efficiency. Background Technique

[0002] The description of the background technique of the present utility model belongs to the related techniques related to the present utility model, and is only used to illustrate and facilitate the understanding of the content of the present utility model. It should not be understood that the applicant clearly believes or presumes that the applicant believes it to be the prior art on the application date of the first application of the present utility model.

[0003] When the long auger drill is drilling, when the drill bit works in the geological conditions of flowing-plastic to soft-plastic cohesive soil with thick soil and sand interlayers, or medium- to high-density clay, or rock, the cuttings (soil or rock) will stick to the drill bit or blades of the drill pipe, hindering the cutting of the drill bit and the discharge of the slag soil. Content of the Utility Model

[0004] The purpose of the embodiment of the present utility model is to provide a novel drill pipe air bag device. This novel drill pipe air bag device is installed between the power head and the long auger drill pipe. This device can enable high-pressure gas to smoothly enter the inner cavity of the drill pipe, thereby realizing the efficient drilling of the drill pipe.

[0005] The purpose of the present utility model is achieved through the following technical solutions:

[0006] A novel drill pipe air bag device includes: a lower flange, an outer air pipe, a positioning component, and a sealing ring; a concave air groove is provided on the lower flange, sealing rings are provided on both sides of the concave air groove, the outer air pipe is sleeved on the concave air groove, two through holes connecting the centers are provided on the concave air groove, and input holes matching the two through holes are provided on the outer air pipe.

[0007] Further, the concave air groove is an annular square concave air groove.

[0008] Further, the positioning component includes positioning key bars and positioning concave blocks; the positioning key bars are fixed at symmetric positions on both sides of the lower part of the outer air pipe; the positioning concave blocks are fixed on the lower flange.

[0009] Further, the fixing method of the positioning key bars to the outer air pipe is welding; the positioning concave blocks are fixed on the lower flange by bolts.

[0010] Further, symmetric air inlet pipes are provided on both sides of the outer air pipe.

[0011] With the above solution, the utility model at least has the following beneficial effects:

[0012] The utility model relates to the technical field of long auger drills, in particular to a novel drill pipe air bag device. The application of this device can blow away the soil or rock debris drilled at the contact position between the drill bit and the drilling surface through high-pressure gas inside the drill pipe, increase the friction between the drill bit and the contact surface, and improve the drilling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solution of the utility model, the following will briefly introduce the drawings required for the description of the embodiments:

[0014] Figure 1 It is a schematic structural diagram of a novel drill pipe air bag device of the utility model;

[0015] Figure 2 It is another schematic structural diagram of a novel drill pipe air bag device of the utility model;

[0016] Figure 3 It is a schematic structural diagram of the lower flange of a novel drill pipe air bag device of the utility model;

[0017] Figure 4 It is a schematic structural diagram of the lower flange of a novel drill pipe air bag device of the utility model;

[0018] Figure 5 It is a schematic structural diagram of the air bag assembly of a novel drill pipe air bag device of the utility model;

[0019] Figure 6 It is a schematic diagram of a large-diameter long auger rock-drilling machine of a novel drill pipe air bag device of the utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The following further details the utility model in conjunction with the embodiments. It should be understood that the embodiments are for those skilled in the art to more easily understand the technical solution of the utility model and should not be used to limit the protection scope of the utility model.

[0021] In the following description, the terms "first" and "second" are only for the purpose of description and should not be construed as indicating or implying relative importance. The following description provides multiple embodiments of the utility model. Different embodiments can be replaced or combined. Therefore, the utility model can also be considered to include all possible combinations of the same and / or different embodiments described. Thus, if one embodiment includes features A, B, and C, and another embodiment includes features B and D, then the utility model should also be considered to include embodiments containing all other possible combinations of A, B, C, and D, even though such embodiments may not be explicitly described in the following content.

[0022] Combined with the attached Figures 1-5 , a new type of drill pipe air bag device, comprising: a lower flange 1, an outer air pipe 2, a positioning component and a sealing ring; a concave air groove is provided on the lower flange, sealing rings are provided on both sides of the concave air groove, the outer air pipe 2 is sleeved on the concave air groove, two through holes connecting the centers are provided on the concave air groove, and input holes matching the two through holes are provided on the outer air pipe 2.

[0023] The air bag assembly is formed by welding the outer air pipe 2, an air inlet pipe 3, and positioning key bars 4. Positioning key bars 4 are welded at symmetric positions on both sides of the lower part of the outer air pipe 2. The air bag assembly is assembled on the lower flange 1. The positioning concave block 5 is fixed to the lower flange 1 with the bolts. The positioning concave block 5 and the positioning key bars 4 cooperate with each other, which can not only prevent the circumferential movement of the air bag assembly but also prevent the up-and-down movement of the air bag assembly; the positioning concave block 5 on the lower flange 1 is fixed to the lower flange 1 by bolts; sealing rings are provided above and below the annular square concave air groove on the lower flange 1. In this way, when high-pressure gas is input through the air bag assembly 2, the gas will enter the two through holes through the annular square concave air groove on the flange, and finally be delivered to the drill pipe sandwich.

[0024] In some embodiments of the present invention, the concave air groove is an annular square concave air groove.

[0025] In some embodiments of the present invention, the positioning component includes positioning key bars 4 and positioning concave blocks 5; the positioning key bars are fixed at symmetric positions on both sides of the lower part of the outer air pipe; the positioning concave block 5 is fixed on the lower flange.

[0026] In some embodiments of the present invention, the fixing method of the positioning key bars 4 and the outer air pipe 2 is welding; the positioning concave block 5 is fixed to the lower flange by bolts.

[0027] In some embodiments of the present invention, symmetric air inlet pipes 3 are provided on both sides of the outer air pipe 2.

[0028] During use, an air compressor works, and high-pressure gas is finally discharged from the gap of the drill bit curved panel through a set of transmission devices. The high-pressure gas blows away the soil or rock debris drilled at the contact position between the drill bit and the drilling surface, increasing the friction between the drill bit and the contact surface and improving the drilling efficiency. At the same time, high-pressure gas is passed through the drill pipe and drill bit, which can reduce the temperature of the drill bit and is also beneficial to increasing the cutting efficiency of the drill bit. Between the blades and the soil, the adhesion between the soil and the drill pipe blades can be reduced, and the soil can also be effectively discharged.

[0029] Combined with the attached Figure 6, during the construction of long - helix drilling, cohesive soil often adheres to the drill rod blades and is not easy to fall off. When encountering medium - dense, dense or rocky soil, the drill bit has difficulty in cutting and is hard to penetrate. If high - pressure gas is injected among them, it will surely change the working condition, increase the cutting efficiency, prevent the soil from sticking to the drill rod blades, reduce the frictional torque, and thus reduce the energy consumption. Based on long - helix drilling, the participation of high - pressure gas will surely make the construction smoother.

[0030] The power head of the large - diameter long - helix rock - boring machine is a special composite power head, which has two kinds of energy output. 1. One is the traditional rotational torque, which is output by the normal rotation of the drill rod. 2. The other is the output of a downward impact kinetic energy at the bottom of the drill rod. This can effectively break the stress circle of the geological structure, enabling the rotary cutting to proceed effectively. Especially when the long - helix drill is drilling in geological conditions such as the flowing - plastic to soft - plastic cohesive soil in the soil - thick sand interlayer, or medium - to high - density clay, or rock, where the drill bit cannot penetrate, the intervention of a downward impact energy can break this stress circle of the geological structure and make the cutting motion proceed.

[0031] Previously, most long - helix drills used walking pile frames, whose basic structure was a large triangle. Its advantage was good stability, but its disadvantages were complex loading and unloading, cumbersome procedures, difficulty in moving the site, and very low cutting efficiency when encountering difficult - to - cut geological conditions. Therefore, the production efficiency was low and the applicable conditions were few. If a rotary drilling rig is used as the chassis and equipped with a long - helix working device with high - pressure air and the above - mentioned composite power head, the production efficiency will be greatly improved and the applicable conditions will also increase significantly.

[0032] The above introduction is only the preferred embodiment of the present invention and is not used to limit the present invention. For those skilled in the art, the present invention can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A new type of drill pipe air encapsulation device, characterized in that: include: A lower flange, an outer air pipe, a positioning component and a sealing ring; the lower flange is provided with a concave air groove, sealing rings are provided on both sides of the concave air groove, the outer air pipe is sleeved on the concave air groove, the concave air groove is provided with two through holes connecting the center of a circle, and the outer air pipe has an input hole matching the two through holes.

2. The novel drill pipe air encapsulation device according to claim 1 is characterized in that: The concave air groove is an annular square concave air groove.

3. The novel drill pipe air encapsulation device according to claim 1 is characterized in that: The positioning component comprises a positioning key strip and a positioning concave block; the positioning key strip is fixed at symmetrical positions on both sides of the lower part of the outer air pipe; and the positioning concave block is fixed on the lower flange.

4. The novel drill pipe air encapsulation device according to claim 3 is characterized in that: The positioning key strip and the outer air pipe are fixed by welding; the positioning recessed block is fixed on the lower flange by bolts.

5. The novel drill pipe air encapsulation device according to claim 1 is characterized in that: Symmetrical air inlet pipes are arranged on both sides of the outer air pipe.

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