Double-layer sealable large-diameter long auger stem with built-in gas transmission channel
By incorporating a gas transmission channel and composite power head in the long auger drill rod, the problem of adhesion between the drill bit and the cut object is solved, and efficient drilling and low energy consumption is achieved, which is suitable for a variety of geological conditions.
Patent Information
- Application Number
- CN202421913794.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-08
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-08-08
AI Technical Summary
When drilling holes in a long auger, the drill bit is stuck with the cut object, resulting in low cutting efficiency, large friction torque, and high energy consumption. It is difficult to effectively drill in the soil and thick sand interlayer, flow-plastic-soft plastic clay, or medium and high-density clay, or rock geological conditions.
A double-layer sealable large-diameter long auger drill pipe with built-in gas transmission channel is designed to transmit high-pressure gas through the drill pipe, blow away soil or rock debris in the contact position of the drill bit and the drilling surface, increase cutting force, reduce friction between the blade and the soil, and use a composite power head to provide rotational and twisting and impact energy, improving cutting efficiency.
It improves drilling efficiency, reduces friction torque and energy consumption, enhances the cutting efficiency of the drill bit, reduces drilling temperature, improves drilling smoothness, and has a wider range of applicable conditions.
Smart Images
Figure CN223136073U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of large-diameter long spiral rock boring rigs, and particularly relates to a double-layer sealable large-diameter long spiral drill pipe with an internal gas transmission channel. Background Art
[0002] The description of the background art of the present utility model belongs to the related art related to the present utility model, and is only used to illustrate and facilitate the understanding of the content of the present utility model, and should not be construed as the applicant clearly believing or presuming that the applicant believes it to be the prior art on the filing date of the first application of the present utility model.
[0003] When the long spiral drill rig drills a hole, when the drill bit works in the geological conditions of flowing-plastic to soft-plastic cohesive soil in the soil-thick sand interlayer, or medium- to high-density clay, or rock, the cuttings (soil or rock) will stick to the drill bit or blade 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 double-layer sealable large-diameter long spiral drill pipe with an internal gas transmission channel. The inner hole of the present utility model can transmit cement slurry or concrete, and the interlayer transmits high-pressure gas. The application of this drill pipe 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 interlayer, increasing the cutting force between the drill bit and the contact surface and improving the cutting efficiency. At the same time, the friction between the cut soil and the blade is reduced, the friction torque is reduced, and the energy consumption is reduced.
[0005] The purpose of the present utility model is achieved through the following technical solutions:
[0006] A double-layer sealable large-diameter long spiral drill pipe with an internal gas transmission channel, including an outer sleeve pipe, a hexagonal female head, a hexagonal male head, spiral blades, and a grouting pipe; the grouting pipe is sleeved inside the outer sleeve pipe; the hexagonal female head and the hexagonal male head are connected in cooperation with each other, the hexagonal male head is fixed at the upper end of the drill pipe, and the hexagonal female head is fixed at the lower end of the drill pipe; spiral blades are fixed on the outer side of the outer sleeve pipe.
[0007] Furthermore, a positioning pin is fixed on the inner wall of the hexagonal female head by a stop bolt, and a positioning groove matching the positioning pin is provided on the outer wall of the hexagonal male head.
[0008] Furthermore, two parallel through holes are provided on the end faces of both the hexagonal female head and the hexagonal male head.
[0009] Furthermore, square grooves for assembling sealing rings are provided on the upper end face and the upper side face of the hexagonal male head.
[0010] Furthermore, the hexagonal female head is concentrically welded to the outer sleeve pipe; the hexagonal male head is concentrically welded to the grouting pipe.
[0011] With the above solution, the utility model has at least the following beneficial effects:
[0012] An air duct is added inside the long spiral drill pipe of the utility model. High-pressure gas blows away the soil or rock debris drilled at the contact position between the drill bit and the drilling surface through the inside of the drill pipe, improving the drilling efficiency. At the same time, high-pressure gas is passed through the drill bit of the drill pipe, which can reduce the temperature of the drill bit and is also beneficial to increasing the cutting efficiency of the drill bit. Between the blade and the slag soil, the adhesion between the slag soil and the drill pipe blade can be reduced, and the slag can also be effectively discharged. 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 use in the description of the embodiments:
[0014] Figure 1 Schematic diagram of the mating structure of the hexagonal male head and the hexagonal female head in the utility model;
[0015] Figure 2 Schematic diagram of the hexagonal male head structure in the utility model;
[0016] Figure 3 Schematic diagram of the structure of the hexagonal female head in the utility model;
[0017] Figure 4 Schematic diagram of the structure of a single drill pipe in the utility model;
[0018] Figure 5 Schematic diagram of the large-diameter long spiral rock excavation machine in the utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0019] The following further details the utility model in combination with 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 cannot be used as a limitation of the protection scope of the utility model.
[0020] In the following description, the terms "first" and "second" are only for the purpose of description and cannot 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 text.
[0021] Such as Figures 1-4As shown in the figure, a double-layer sealable large-diameter long auger drill rod with an internal gas transmission channel includes an outer sleeve 1, a hexagonal female head 2, a hexagonal male head 3, a spiral blade 4, and a grouting pipe 5; the grouting pipe 5 is sleeved inside the outer sleeve 1; the hexagonal female head 2 and the hexagonal male head 3 are connected in cooperation with each other, the hexagonal male head 3 is fixed at the upper end of the drill rod, and the hexagonal female head 2 is fixed at the lower end of the drill rod; the spiral blade is fixed on the outer side of the outer sleeve 1.
[0022] The above solution can already achieve the purpose of the present utility model. When the long auger drill rig drills a hole, when the drill bit works in the geological conditions of flowing-plastic to soft-plastic cohesive soil in the soil-thick sand interlayer, or medium- to high-density clay, or rock, the cuttings (soil or rock) will stick to the drill bit or blade of the drill rod, hindering the cutting of the drill bit and the discharge of the soil residue. Now, an air compressor is used to work, and high-pressure gas is passed through a set of transmission devices and finally discharged from the gaps of the curved panel of the drill bit. 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 cutting force between the drill bit and the contact surface, improving the drilling efficiency. At the same time, by passing high-pressure gas at the drill bit of the drill rod, the temperature of the drill bit can be reduced, which is also beneficial to increasing the cutting efficiency of the drill bit. Between the blade and the soil residue, the adhesion between the soil residue and the drill rod blade can be reduced, the frictional torque between the soil and the blade can be reduced, the energy consumption can be reduced, and the soil residue can also be effectively discharged.
[0023] The following gives a preferred solution on this basis:
[0024] In a preferred embodiment, a positioning pin 6 is fixed on the inner wall of the hexagonal female head 2 by a stop bolt. A positioning groove matching the positioning pin 6 is provided on the outer wall of the hexagonal male head 3. It is fixed with two positioning pins 6, and the positioning pin 6 is fixed on the hexagonal female head 2 by a stop bolt.
[0025] In a preferred embodiment, two parallel through holes are provided on the end faces of both the hexagonal female head 2 and the hexagonal male head 3. It is convenient for ventilation up and down.
[0026] In a preferred embodiment, square grooves for assembling sealing rings are provided on both the upper end face and the upper side face of the hexagonal male head 3. Square grooves for assembling sealing rings are provided on both the upper end face and the upper side face of the hexagonal male head 3. When they are connected in cooperation with the female head, due to the presence of the sealing ring, gas leakage can be avoided when high-pressure gas passes through.
[0027] In a preferred embodiment, the hexagonal female head 2 is concentrically welded to the outer sleeve 1; the hexagonal male head 3 is concentrically welded to the grouting pipe 5. Ensure concentricity, and at the same time require reliable welding, and there shall be no air leakage at the weld. The hexagonal male head 3 is welded at the upper end of the drill rod, the hexagonal female head 2 is welded at the lower end of the drill rod, and finally the blade is welded on the outside to ensure a smooth interface.
[0028] Combined with the attached Figure 5, during the construction of long spiral drilling, cohesive soil often adheres to the drill rod blades and is not easy to fall off. When encountering medium-dense or dense or rock formations, 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 adhering to the drill rod blades, and reduce the friction torque. Therefore, the energy consumption is reduced. Based on long spiral drilling, the participation of high-pressure gas will surely make the construction smoother.
[0029] The power head of the large-diameter long spiral rock-drilling machine is a special composite power head, which has two types 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 spiral drilling rig 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 enable the cutting movement to proceed.
[0030] Previously, most long spiral drilling rigs were walking pile frames with a basic structure of a large triangle. Its advantage is good stability, but the disadvantages are complex loading and unloading procedures, cumbersome formalities, and difficulty in moving to other sites. When encountering difficult-to-cut geological conditions, the cutting efficiency is very low, so the production efficiency is low and the applicable conditions are limited. If a rotary drilling rig is used as the chassis and equipped with a long spiral working equipment with high-pressure air and the above-mentioned composite power head, the production efficiency will be greatly improved. The applicable conditions will also increase significantly.
[0031] 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, various modifications and changes can be made to the present invention. 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 double-layer sealable large-diameter long auger drill rod with an internal gas transmission channel, characterized in that, It includes an outer sleeve, a hexagonal female head, a hexagonal male head, a spiral blade and a grouting pipe; the grouting pipe is sleeved inside the outer sleeve; the hexagonal female head and the hexagonal male head are connected in a matching manner, the hexagonal male head is fixed at the upper end of the drill pipe, and the hexagonal female head is fixed at the lower end of the drill pipe; the spiral blade is fixed on the outer side of the outer sleeve.
2. The double-layer sealable large-diameter long auger drill pipe with an internal gas transmission channel according to claim 1, characterized in that, A positioning pin is fixed on the inner wall of the hexagonal female head by a fixing bolt, and a positioning groove matching with the positioning pin is provided on the outer wall of the hexagonal male head.
3. The double-layer sealable large-diameter long auger drill pipe with an internal gas transmission channel according to claim 1, wherein Two parallel through holes are provided on the end faces of the hexagonal female head and the hexagonal male head.
4. The double-layer sealable large-diameter long auger drill pipe with an internal gas transmission channel according to claim 1, characterized in that Square grooves for assembling sealing rings are provided on the upper end face and the upper side face of the hexagonal male head.
5. The double-layer sealable large-diameter long auger drill pipe with an internal gas transmission channel according to claim 1, characterized in that, The hexagonal female head is concentrically welded to the outer sleeve; the hexagonal male head is concentrically welded to the grouting pipe.