Drill pipe and drilling tools
By setting guide plates on the drill rod, the problem of soil adhesion after the drill rod is drilled in the collapsed formation is solved, and the drill rod is successfully pulled out in the collapsed formation is achieved, which improves construction efficiency and reduces energy consumption.
Patent Information
- Application Number
- CN202010122021.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2020-02-26
- Publication Date
- 2025-08-26
- Estimated Expiration
- 2040-02-26
AI Technical Summary
When existing short auger drilling tools are constructed in a formation that is prone to collapse holes, the soil rebounds and sticks to the rod without spiral blades after drilling into it, forming strong resistance, which makes it difficult to pull the drilling rod up.
A drill rod is designed, including a core rod, spiral blade and guide plate. The guide plate is fixed vertically along the axial direction of the core rod, inclined toward the center of the core rod, and the maximum distance does not exceed the vertical distance between the outer edge of the spiral blade and the central axis of the core rod. During the drilling and pulling process, the guide plate increases the pressure of the drill rod to the soil to reduce resistance.
During drilling and pulling, the guide plate strengthens the pressure between the drill rod and the soil, reduces resistance, improves construction efficiency and reduces energy consumption, and ensures that the drill rod is easily pulled out of the soil.
Smart Images
Figure CN111173460B_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of construction tools, in particular to a drill rod and a drill tool. Background Art
[0002] The process of constructing cast-in-place piles in the ground requires the use of a drilling tool. The drill rod in the drilling tool is hollow and is used to drill into the soil to form a pile hole for pile formation. The hollow part of the drill rod is used to form a channel for entering concrete.
[0003] To facilitate penetration of the drill rod into the ground, the drill rod in the aforementioned drilling tool is equipped with a spiral blade extending along its axial direction. Because the longer the spiral blade, the greater the contact area between the outer edge of the spiral blade and the soil, the greater the torque required to rotate the drill rod into the soil, which in turn reduces construction efficiency and increases drill rod costs. Therefore, a current drilling tool used for constructing cast-in-place piles in strata is a short auger drill. The spiral blade on the drill rod in this short auger drill extends from one end of the drill rod to the middle of the drill rod, with a smooth section between the other end of the drill rod and the spiral blade.
[0004] However, when constructing soil-squeezed cast-in-place piles in strata prone to hole collapse, after the drill rod in the short spiral drill is drilled into the ground, the soil will rebound and stick to the part of the drill rod that is not equipped with spiral blades, thereby forming a strong resistance, which will greatly hinder the process of pulling out the drill rod. Summary of the Invention
[0005] The purpose of the present invention is to provide a drill rod and drilling tools to alleviate the technical problem in the prior art that when constructing soil-squeezing cast-in-place piles in strata prone to hole collapse, the soil in the short spiral drill tool will rebound and stick to the drill rod body that is not equipped with spiral blades after the drill rod is drilled into the ground, thereby forming strong resistance, which will greatly hinder the process of pulling out the drill rod.
[0006] The drill rod provided by the present invention comprises a core rod, spiral blades and a guide plate;
[0007] The core rod comprises a spiral section and a smooth section. The spiral section of the core rod is provided with a spiral blade, which spirally extends along the axial direction of the core rod.
[0008] The guide plate is fixed vertically to the rod body of the smooth section of the core rod along the axial direction of the core rod; the side of the remaining side of the guide plate facing away from the spiral blade is inclined from the spiral section to the smooth section of the core rod toward the direction close to the central axis of the core rod;
[0009] The maximum vertical distance between each of the sides of the guide plate facing away from the core rod and the central axis of the core rod is not greater than the vertical distance between the outer edge of the spiral blade and the central axis of the core rod.
[0010] Furthermore, the guide plate is a triangular plate, and the vertical distance between the vertex away from the core rod and the central axis of the core rod among the three vertices of the guide plate is equal to the vertical distance between the outer edge of the spiral blade and the central axis of the core rod.
[0011] Furthermore, among the three side edges of the guide plate, the length of the side edge fixed on the smooth section of the core rod and the length of the side edge facing away from the spiral blade are both greater than the length of the other side edges.
[0012] Furthermore, the guide plate is an obtuse-angled triangular plate, and among the three vertices of the guide plate, the vertex corresponding to the maximum inner angle of the guide plate is the vertex farthest from the core rod.
[0013] Furthermore, there are multiple guide plates, which are arranged on the rod body of the smooth section of the core rod at intervals along the circumference of the core rod.
[0014] Furthermore, a plurality of guide plates are fixed on the rod body of the smooth section of the core rod at equal intervals along the circumference of the core rod.
[0015] Furthermore, the drill rod also includes a guide tube, the core rod is hollow, and the guide tube is sleeved and fixed inside the core rod.
[0016] Furthermore, the outer edge of the spiral blade is tooth-shaped.
[0017] Furthermore, the side of the guide plate facing away from the spiral blade is tooth-shaped.
[0018] The drilling tool provided by the present invention includes the drill rod described in any one of the above technical solutions.
[0019] The drill rod and drilling tool provided by the present invention can produce the following beneficial effects:
[0020] The drill rod provided by the present invention comprises a core rod, a spiral blade, and a guide plate. The core rod comprises a spiral section and a smooth section. The spiral blade is provided on the shaft of the spiral section of the core rod, and the spiral blade extends spirally along the axial direction of the core rod. The guide plate is fixed perpendicularly to the shaft of the smooth section of the core rod along the axial direction of the core rod. The remaining side edges of the guide plate, facing away from the spiral blade, are inclined toward the central axis of the core rod from the spiral section to the smooth section. The maximum vertical distance between each side edge of the guide plate facing away from the core rod and the central axis of the core rod is no greater than the vertical distance between the outer edge of the spiral blade and the central axis of the core rod. When constructing a cast-in-place pile in a stratum, the spiral section of the core rod with the spiral blade is drilled into the ground first, and the spiral blade facilitates the drilling of the drill rod into the ground. Because the maximum vertical distance between each side edge of the guide plate facing away from the core rod and the central axis of the core rod is no greater than the vertical distance between the outer edge of the spiral blade and the central axis of the core rod, the guide plate does not hinder the drilling of the spiral blade during the drilling process. The side of the guide plate, facing away from the spiral blades, slopes toward the core rod's central axis from the spiral section to the smooth section. This increases the pressure exerted by the drill rod on the soil as the core rod is pulled out, thereby reducing the resistance between the two. Therefore, even if the soil rebounds and sticks to the smooth section of the core rod during extraction, the increased pressure from the guide plate will make it easier to extract the drill rod from the soil.
[0021] In addition, the guide plate can also support the soil when the soil rebounds and sticks to the smooth section of the core rod, preventing a large area of soil from sticking to the smooth section of the core rod, thereby reducing the resistance between the drill rod and the soil and facilitating the pulling out of the drill rod.
[0022] Compared with the prior art, the drill rod provided by the present invention utilizes a guide plate to increase the pressure of the drill rod on the soil during the process of pulling up the drill rod, thereby reducing the resistance between the drill rod and the soil, making it easier to pull the drill rod out of the soil.
[0023] The drilling tool provided by the present invention includes the above-mentioned drill rod, so the drilling tool provided by the present invention and the above-mentioned drill rod can achieve the same beneficial effects. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0025] Figure 1 A schematic structural diagram of a drill rod provided in Example 1 of the present invention;
[0026] Figure 2 for Figure 1 A cross-sectional view of the drill pipe in FIG.
[0027] Figure 3 for Figure 1 Top view of the drill pipe.
[0028] Icon: 1-core rod; 10-connector; 2-spiral blade; 3-guide plate; 4-catheter; 5-positioning ring. DETAILED DESCRIPTION
[0029] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the embodiments. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0030] Example 1:
[0031] like Figure 1-Figure 3 As shown, the drill rod provided in this embodiment includes a core rod 1, a spiral blade 2, and a guide plate 3. The core rod 1 includes a spiral section and a smooth section. The spiral blade 2 is provided on the shaft of the spiral section of the core rod 1, and the spiral blade 2 extends helically along the axial direction of the core rod 1. The guide plate 3 is fixed perpendicularly to the shaft of the smooth section of the core rod 1 along the axial direction of the core rod 1. The remaining side edges of the guide plate 3, which face away from the spiral blade 2, are inclined toward the central axis of the core rod 1 from the spiral section to the smooth section of the core rod 1. The maximum vertical distance between each side edge of the guide plate 3 facing away from the core rod 1 and the central axis of the core rod 1 is no greater than the vertical distance between the outer edge of the spiral blade 2 and the central axis of the core rod 1.
[0032] During the construction of a cast-in-place pile in a stratum, the spiral section of the core rod 1, equipped with spiral blades 2, is bored into the ground first. The spiral blades 2 facilitate the penetration of the drill rod into the ground. Because the maximum vertical distance between each side of the guide plate 3 facing away from the core rod 1 and the central axis of the core rod 1 is no greater than the vertical distance between the outer edge of the spiral blades 2 and the central axis of the core rod 1, the guide plate 3 does not hinder the penetration of the spiral blades 2 during the drilling process. Furthermore, the side of the guide plate 3 facing away from the spiral blades 2 is inclined toward the central axis of the core rod 1 from the spiral section to the smooth section. This increases the pressure exerted by the drill rod on the soil during extraction, thereby reducing the resistance between the drill rod and the soil. Therefore, even if the soil rebounds and sticks to the smooth section of the core rod 1 during extraction, the increased pressure exerted by the guide plate 3 on the soil makes it easier to extract the drill rod from the soil.
[0033] In addition, the guide plate 3 can also support the soil when the soil rebounds and sticks to the smooth section of the core rod 1, preventing the soil from sticking to the smooth section of the core rod 1 over a large area, thereby reducing the resistance between the drill rod and the soil, making it easier to pull out the drill rod.
[0034] Compared with the prior art, the drill rod provided in this embodiment utilizes the guide plate 3 to increase the pressure of the drill rod on the soil during the process of pulling up the drill rod, thereby reducing the resistance between the drill rod and the soil, making it easier to pull the drill rod out of the soil.
[0035] It can be seen that the drill rod provided in this embodiment alleviates the technical problem existing in the prior art that when constructing soil-squeezed cast-in-place piles in a stratum prone to hole collapse, the soil will rebound and stick to the drill rod body that is not equipped with spiral blades after the drill rod in the short spiral drill is drilled into the ground, thereby forming a strong resistance, which will greatly hinder the process of pulling out the drill rod.
[0036] Among them, when pulling up the drill rod, the drill rod can be driven to rotate and pulled out at the same time. Since the guide plate 3 can enhance the pressure between the drill rod and the soil, thereby reducing the resistance between the drill rod and the soil, during the process of rotating and lifting the drill rod, the guide plate 3 can reduce the torque required in the process of pulling up the drill rod, which can not only protect the drill rod, but also reduce energy consumption.
[0037] Because the guide plate 3 reduces the resistance between the drill rod and the soil, the drill rod can be directly pulled out of the soil during the latter stage of pulling the drill rod out. By directly pulling the drill rod out of the soil, the pile formed in the stratum has a smooth, straight rod shape near the ground. This smooth, straight rod shape near the ground can improve the pile's bearing capacity. Therefore, the drill rod provided in this embodiment can also be used to construct piles with a smooth, straight rod shape near the ground.
[0038] like Figure 1 and Figure 2 As shown, the guide plate 3 is a triangular plate. Among the three vertices of the guide plate 3, the vertical distance between the vertex away from the core rod 1 and the central axis of the core rod 1 is equal to the vertical distance between the outer edge of the spiral blade 2 and the central axis of the core rod 1.
[0039] Among the three vertices of the guide plate 3, the vertical distance between the vertex away from the core rod 1 and the central axis of the core rod 1 is equal to the vertical distance between the outer edge of the spiral blade 2 and the central axis of the core rod 1. This can ensure that the guide plate 3 does not affect the working process of the spiral blade 2 while maximizing the role of the guide plate 3 in enhancing the pressure between the drill rod and the soil.
[0040] Furthermore, among the three sides of the guide plate 3, the length of the side fixed on the smooth section of the core rod 1 and the length of the side facing away from the spiral blade 2 are both greater than the length of the other sides.
[0041] The length of the side of the guide plate 3 fixed on the smooth section of the core rod 1, and the length of the side facing away from the spiral blade 2, are both greater than the length of the other side, so that the side of the guide plate 3 used to enhance the pressure between the drill rod and the soil is long enough, which not only guides the drill rod during the process of pulling out the drill rod, but also enhances the effect of the guide plate 3 in enhancing the pressure between the drill rod and the soil.
[0042] like Figure 1 and Figure 2 As shown, the guide plate 3 is an obtuse-angled triangular plate. Among the three vertices of the guide plate 3 , the vertex corresponding to the maximum inner angle of the guide plate 3 is the vertex farthest from the core rod 1 .
[0043] The guide plate 3 is an obtuse triangle plate, which can not only increase the pressure between the drill rod and the soil during the process of pulling out the drill rod, but also prevent the guide plate 3 from obstructing the drilling process of the drill rod when the drill rod is drilled into the ground.
[0044] like Figure 1 and Figure 3 As shown, there are multiple guide plates 3, and the multiple guide plates 3 are arranged on the rod body of the smooth section of the core rod 1 at intervals along the circumference of the core rod 1.
[0045] When there are multiple guide plates 3, the guide plates 3 can be lifted to enhance the pressure between the drill rod and the soil, further facilitating the extraction of the drill rod from the soil.
[0046] like Figure 3 As shown, a plurality of guide plates 3 are fixed on the smooth section of the core rod 1 at equal intervals along the circumference of the core rod 1 .
[0047] A plurality of guide plates 3 are fixed on the smooth section of the core rod 1 at equal intervals along the circumference of the core rod 1, which can make the force between the drill rod and the soil more uniform and the drill rod extraction process more stable.
[0048] like Figure 2 As shown, the drill rod provided in this embodiment further includes a guide tube 4 . The core rod 1 is hollow, and the guide tube 4 is sleeved and fixed inside the core rod 1 .
[0049] The conduit 4 and the core rod 1 can be arranged concentrically, and the interior of the conduit 4 is used as a passage for the concrete.
[0050] Furthermore, the catheter 4 and the core rod 1 can be fixed together by a positioning ring 5. Specifically, the positioning ring 5 is sleeved and fixed on the catheter 4, and the core rod 1 is sleeved on the positioning ring 5 and fixedly connected with the positioning ring 5.
[0051] The two ends of the core rod 1 in the drill rod provided in this embodiment can be respectively connected to the male joint 10 or the female joint 10 in the male-female joint 10, and the remaining components in the drilling tool or the remaining core rods 1 are also connected to the male joint 10 or the female joint 10 in the male-female joint 10. The male joint 10 and the female joint 10 are detachably connected, and the male-female joint 10 facilitates the connection of the core rod 1 with the remaining components in the drilling tool or the remaining core rods 1.
[0052] Among them, the male connector 10 and the female connector 10 in the male-female connector 10 are both hollow, and the inner side wall at the hollow position of the male connector 10 and the inner side wall at the hollow position of the female connector 10 are both hexagonal or octagonal.
[0053] like Figure 1 As shown, the outer edge of the spiral blade 2 is tooth-shaped.
[0054] The outer edge of the spiral blade 2 is tooth-shaped, which can increase the pressure between the spiral blade 2 and the soil, reduce the friction between the spiral blade 2 and the soil, and thus facilitate the spiral blade 2 to drill into the soil.
[0055] like Figure 1 As shown, the side of the guide plate 3 facing away from the spiral blade 2 is tooth-shaped.
[0056] The side of the guide plate 3 facing away from the spiral blade 2 is serrated, which can increase the pressure between the guide plate 3 and the soil during the process of pulling out the drill rod, while cutting the soil, thereby further reducing the resistance between the drill rod and the soil when pulling out the drill rod, and further improving the ease of pulling out the drill rod.
[0057] Example 2:
[0058] The drilling tool provided in this embodiment includes the drill rod of the first embodiment. The drilling tool may further include a power device for driving the drill rod axially and a power device for driving the drill rod rotationally, both of which are connected to the drill rod. The drilling tool may further include a tapered drill bit connected to the end of the drill rod near the spiral blade.
[0059] Because the drill tool provided in this embodiment includes the drill rod of Example 1, the drill tool provided in this embodiment and the drill rod of Example 1 can solve the same technical problems and achieve the same technical effects. The drill tool provided in this embodiment also alleviates the technical problem in the prior art that, when constructing soil-squeezing cast-in-place piles in strata prone to collapse, the soil in the short spiral drill tool will rebound and adhere to the drill rod shaft that is not equipped with spiral blades after being drilled into the ground, thereby forming a strong resistance and greatly hindering the process of pulling out the drill rod.
[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.
Claims
1. A drill pipe, characterized in that: The drill rod includes a core rod, spiral blades and a guide plate; The core rod comprises a spiral section and a smooth section, the spiral blades are provided on the rod body of the spiral section of the core rod, and the spiral blades extend spirally along the axial direction of the core rod; The guide plate is fixed vertically to the smooth section of the core rod along the axial direction of the core rod; the remaining side edges of the guide plate, which are away from the spiral blades, are inclined from the spiral section to the smooth section of the core rod toward the central axis of the core rod; The maximum vertical distance between each side of the guide plate facing away from the core rod and the central axis of the core rod is not greater than the vertical distance between the outer edge of the spiral blade and the central axis of the core rod.
2. The drill rod according to claim 1, characterized in that The guide plate is a triangular plate. Among the three vertices of the guide plate, the vertical distance between the vertex away from the core rod and the central axis of the core rod is equal to the vertical distance between the outer edge of the spiral blade and the central axis of the core rod.
3. The drill rod according to claim 2, characterized in that Among the three sides of the guide plate, the length of the side fixed on the smooth section of the core rod and the length of the side facing away from the spiral blade are both greater than the length of the other side.
4. The drill rod according to claim 3, characterized in that The guide plate is an obtuse-angled triangular plate. Among the three vertices of the guide plate, the vertex corresponding to the maximum inner angle of the guide plate is the vertex farthest from the core rod.
5. The drill rod according to claim 1, characterized in that There are a plurality of guide plates, which are arranged on the rod body of the smooth section of the core rod at intervals along the circumference of the core rod.
6. The drill rod according to claim 5, characterized in that A plurality of guide plates are fixed on the rod body of the smooth section of the core rod at equal intervals along the circumference of the core rod.
7. The drill rod according to claim 1, characterized in that The drill rod further comprises a guide tube, the core rod is hollow, and the guide tube is sleeved and fixed inside the core rod.
8. The drill rod according to claim 1, wherein: The outer edge of the spiral blade is tooth-shaped.
9. The drill rod according to any one of claims 1 to 8, characterized in that: The side of the guide plate facing away from the spiral blade is tooth-shaped.
10. A drilling tool, characterized in that: The drilling tool comprises the drill rod according to any one of claims 1 to 9.
Citation Information
Patent Citations
Drill rod and drilling tool
CN211623356U