Rock-soil piling and pore-forming drill bit
By incorporating a casing and striking block structure into the drill bit design, the vibration generated by the drilling rig's inertial force is used to disrupt the cohesion of the clay, thus solving the problem of difficult slag removal in cohesive soil by auger drill bits and achieving a highly efficient soil removal effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-26
- Publication Date
- 2026-03-27
AI Technical Summary
When using auger drill bits for pile driving, clay with high viscosity or silty soil with high water content can easily form a sticky layer in the gap between the auger blades and the sleeve, making it difficult for the drill bit to remove slag. Especially in clay or silty soil, the cohesion between soil particles is large and difficult to completely break down by centrifugal force, resulting in problems with drill bit slag removal.
A drilling bit for rock and soil piling was designed. By installing an outer casing on the outside of the lower casing and setting a sealing groove and a positioning groove between the two, a closed cavity is formed. The striking block slides back and forth under the inertial force of the drilling rig, generating vibration, which breaks the cohesion of the sticky soil and separates it from the auger. The soil is then discharged by the centrifugal force of the rotating auger.
It effectively improves the slag removal rate of the drill bit, ensuring that the soil can be effectively separated and discharged, solving the problem of difficult slag removal by the drill bit in clay or silty soil, and improving drilling efficiency.
Smart Images
Figure CN224049107U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a drilling tool technical field, especially relates to a rock and soil pile-forming drilling head. BACKGROUND
[0002] The drilling tool used for piling is the core tool for hole forming in pile foundation construction, mainly breaks the rock and soil body to form the pile hole through rotation, impact or cutting and the like, and the common ones are rotary drilling heads suitable for clay, sandy soil and soft rock stratum, directly taking slag through the drill bucket, impact drilling heads for hard rock stratum or gravel stratum, breaking the rock through impact force, and spiral drilling heads suitable for dry work hole forming, conveying soil slag through spiral blades and the like.
[0003] When the piling operation is carried out through the spiral drilling head, the spiral drilling head directly conveys the soil slag to the ground along the spiral blade, and the drilling head is repeatedly rotated through the drill rod, so that the mud stuck in the sleeve of the drilling head is shaken and discharged, and when the clay with high viscosity or the silt soil with strong water content is encountered, the cohesive force between the mud particles is large, the viscous layer is easily formed between the spiral blade and the sleeve gap, and even the adsorption block is formed, and the centrifugal force of the rotation of the drill rod is difficult to completely break the cohesive force, and in the drilling process, the mud cut by the front end of the sleeve needs to be conveyed upward through the spiral pitch space of the spiral blade, part of the mud is compacted and stuck in the gap under the extrusion force, and then the problem of the soil discharge of the drilling head is caused. SUMMARY
[0004] The utility model discloses a rock and soil pile-forming drilling head, which can effectively solve the problems in the background art.
[0005] To achieve the above-mentioned purpose, the utility model takes the technical scheme that:
[0006] A rock and soil pile-forming drilling head, comprising a main shaft, a connecting head fixedly installed at the top of the main shaft, a spiral drilling tool fixedly installed at the bottom of the main shaft, an upper sleeve fixedly installed outside the main shaft, a lower sleeve fixedly installed at the bottom of the upper sleeve, an outer sleeve fixedly installed outside the lower sleeve, a plurality of lower limit seats fixedly installed inside the outer sleeve, side limit seats fixedly installed on both sides of the top of the lower limit seats, an upper limit seat fixedly connected on the two side limit seats, and a knocking block movably installed between the lower limit seat and the upper limit seat.
[0007] As a further preferred scheme of the utility model, a first sealing groove is formed in the bottom of the upper sleeve along the outer side contour, so that after the outer sleeve is inserted and installed outside the lower sleeve, the upper end of the outer sleeve is tightly connected with the upper sleeve, preventing the cavity between the lower sleeve and the outer sleeve from entering the silt, a plurality of positioning grooves are formed in the top of the first sealing groove, and the plurality of positioning grooves are equidistantly arranged in the top of the first sealing groove, which can improve the anti-torsion performance of the outer sleeve after being installed outside the lower sleeve.
[0008] As a further preferred scheme of the utility model, the outer sleeve top is fixedly installed with multiple positioning blocks.
[0009] As a further preferred scheme of the utility model, the outer sleeve inside is provided with a second sealing groove, the outer sleeve is insertedly installed outside the lower sleeve, the second sealing groove is insertedly installed at the lower sleeve bottom, the positioning block is insertedly installed in the corresponding positioning groove, and the outer sleeve lower portion is fixed with the lower sleeve through multiple screws, one outer sleeve is insertedly installed outside the lower sleeve, so that a closed cavity is formed between the lower sleeve and the outer sleeve, and the multiple knocking blocks can normally slide.
[0010] As a further preferred scheme of the utility model, the lower limit seat top is provided with a sliding groove, and the upper limit seat bottom is also provided with a sliding groove.
[0011] As a further preferred scheme of the utility model, the knocking block top and bottom are rotatably installed with multiple balls, the knocking block is slidably connected between the lower limit seat and the upper limit seat through the top and bottom balls, and the part of the ball outside the knocking block is slidably connected in one of the sliding grooves, so that the knocking block can reciprocatingly move between the lower limit seat and the upper limit seat through the inertia of the upper sleeve and the lower sleeve, thereby generating vibration by the knocking block knocking the side limit seat, and the soil filled between the spiral drill and the lower sleeve is separated and discharged.
[0012] Compared with the prior art, the utility model has the advantages of:
[0013] In the utility model, one outer sleeve is insertedly installed outside the lower sleeve, so that a closed cavity is formed between the lower sleeve and the outer sleeve, and multiple knocking blocks are slidably installed inside the outer sleeve, the inertia force of the drilling machine positive and negative rotation drill can be utilized to realize the reciprocating sliding of the knocking block, thereby making the knocking block repeatedly knock the side limit seat to generate vibration, the soil adhered between the spiral drill and the lower sleeve is stripped by the vibration, and the emptying rate of the drill soil is improved. BRIEF DESCRIPTION OF DRAWINGS
[0014] Figure 1 It is a main body structure schematic view of the utility model rock-soil pile-forming drilling head;
[0015] Figure 2 It is an upper sleeve and lower sleeve structure schematic view of the utility model rock-soil pile-forming drilling head;
[0016] Figure 3 It is a main body structure sectional view of the utility model rock-soil pile-forming drilling head;
[0017] Figure 4The utility model relates to a casing pipe structure schematic view of a rock and soil pile-forming drill bit,
[0018] Figure 5 The utility model relates to a casing pipe sectional view of a rock and soil pile-forming drill bit,
[0019] Figure 6 For Figure 5 The enlarged view of A in the middle,
[0020] Figure 7 The utility model relates to a knocking block structure schematic view of a rock and soil pile-forming drill bit.
[0021] In the figure: 1, main shaft, 2, connecting head, 3, spiral drilling tool, 4, upper casing pipe, 5, lower casing pipe, 6, outer casing pipe, 7, lower limit seat, 8, side limit seat, 9, upper limit seat, 10, knocking block, 11, first sealing groove, 12, positioning groove, 13, positioning block, 14, second sealing groove, 15, sliding groove, 16, ball bearing. Specific embodiments
[0022] In order to make the technical means, creative features, purposes and effects of the utility model easy to understand, the utility model is further described below in combination with specific embodiments.
[0023] As Figures 1-7 The utility model discloses a rock and soil pile-forming drill bit, including main shaft 1, the top fixed mounting of main shaft 1 has connecting head 2, the bottom fixed mounting of main shaft 1 has spiral drilling tool 3, the outer side fixed mounting of main shaft 1 still has upper casing pipe 4, the bottom fixed mounting of upper casing pipe 4 has lower casing pipe 5, the outer side fixed mounting of lower casing pipe 5 has outer casing pipe 6, the inner side fixed mounting of outer casing pipe 6 has a plurality of lower limit seat 7, and both sides of the top of lower limit seat 7 are fixedly installed with side limit seat 8, and the upper fixed connection of two side limit seats 8 has upper limit seat 9, and knocking block 10 is movably installed between lower limit seat 7 and upper limit seat 9.
[0024] As Figure 2 The bottom of upper casing pipe 4 is provided with first sealing groove 11 along the outside profile, and the first sealing groove 11 is provided, so that after the outer casing pipe 6 is inserted and installed on the outside of lower casing pipe 5, the upper end of the outer casing pipe 6 is tightly connected with the upper casing pipe 4, and the cavity between the lower casing pipe 5 and the outer casing pipe 6 is prevented from entering the silt, a plurality of positioning grooves 12 are formed in the top of the first sealing groove 11, the plurality of positioning grooves 12 are equidistantly arranged in the top of the first sealing groove 11, the anti-torsion performance of the outer casing pipe 6 after being installed on the outside of the lower casing pipe 5 can be improved, and a plurality of positioning blocks 13 are fixedly installed on the top of the outer casing pipe 6.
[0025] As Figures 1-7As shown, the second sealing groove 14 is arranged in the outer sleeve 6, the outer sleeve 6 is arranged in the lower sleeve 5, the second sealing groove 14 is arranged in the bottom of the lower sleeve 5, the positioning block 13 is arranged in the corresponding positioning groove 12, and the outer sleeve 6 is fixed to the lower sleeve 5 by a plurality of screws, the outer sleeve 6 is arranged in the lower sleeve 5, and the closed cavity is formed between the lower sleeve 5 and the outer sleeve 6, so that the plurality of knocking blocks 10 can slide normally, the sliding groove 15 is arranged in the top of the lower limiting seat 7, the sliding groove 15 is arranged in the bottom of the upper limiting seat 9, the plurality of rolling balls 16 are arranged on the top and the bottom of the knocking block 10, the knocking block 10 is connected between the lower limiting seat 7 and the upper limiting seat 9 through the rolling balls 16 on the top and the bottom, the part of the rolling ball 16 outside the knocking block 10 is connected in the sliding groove 15, and the knocking block 10 can reciprocate between the lower limiting seat 7 and the upper limiting seat 9 through the rolling balls 16 on the top and the bottom, so that the knocking block 10 knocks the side limiting seat 8 to generate vibration, and the soil filled between the spiral drilling tool 3 and the lower sleeve 5 can be separated and discharged.
[0026] It should be noted that the utility model is a rock soil pile forming hole drill bit, the main shaft 1 is fixedly connected with the drill output end through the connecting head 2, the main shaft 1 drives the spiral drilling tool 3 to rotate to realize rock soil cutting, the upper sleeve 4 and the lower sleeve 5 rotate synchronously with the main shaft 1, the outer sleeve 6 outside the lower sleeve 5 is fixed by screwing through the cooperation of the positioning block 13 and the positioning groove 12 in the bottom of the upper sleeve 4, and forms a closed cavity with the lower sleeve 5, when the whole drill is pulled out of the pile hole, the drill controls the main shaft 1 to reverse to shake, the knocking block 10 moves back and forth in the cavity due to inertial force, the side surface of the knocking block 10 continuously impacts the side limiting seat 8, vibration is generated and is transmitted to the lower sleeve 5 and the spiral drilling tool 3, the viscous soil between the spiral drilling tool 3 and the lower sleeve 5 is broken down under the action of vibration, the soil block formed due to extrusion consolidation or adhesion is gradually loosened and peeled off, and the loosened soil is pushed out along the spiral blade by the centrifugal force of the spiral drilling tool 3.
[0027] The basic principle and main features of the utility model and the advantages of the utility model are shown and described. It should be understood by those skilled in the art that the utility model is not limited by the above examples, and the above examples and descriptions in the specification only illustrate the principle of the utility model, and various changes and improvements can be made to the utility model without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model claimed. The scope of protection of the utility model is defined by the appended claims and their equivalents.
Claims
1. A geotechnical pile driving hole forming bit, characterized by: The utility model relates to a spiral drilling device, including the main shaft (1), the main shaft (1) top fixed mounting has the connecting head (2), the main shaft (1) bottom fixed mounting has spiral drilling tool (3), the main shaft (1) outside still fixed mounting has upper sleeve (4), upper sleeve (4) bottom fixed mounting has lower sleeve (5), lower sleeve (5) outside fixed mounting has outer sleeve (6), the outer sleeve (6) inboard fixed mounting has a plurality of lower limit seat (7), lower limit seat (7) top both sides fixed mounting has side limit seat (8), two side limit seat (8) top fixedly connected with upper limit seat (9), lower limit seat (7) and upper limit seat (9) between swing mounting have knock block (10).
2. A geotechnical piling and hole forming bit according to claim 1, wherein: The bottom of the upper sleeve (4) is provided with a first sealing groove (11) along the outer contour, and a plurality of positioning grooves (12) are formed in the top of the first sealing groove (11).
3. A geotechnical piling and hole forming bit according to claim 2, wherein: The outer sleeve (6) is fixedly installed with a plurality of positioning blocks (13) on the top.
4. A ground piling and hole forming drill bit according to claim 3, wherein: The outer sleeve (6) is provided with a second sealing groove (14) on the inner side, the outer sleeve (6) is inserted and installed on the outer side of the lower sleeve (5), the second sealing groove (14) is inserted and installed on the bottom of the lower sleeve (5), the positioning block (13) is inserted and installed in the corresponding positioning groove (12), and the outer sleeve (6) below is fixed with the lower sleeve (5) by a plurality of screws.
5. A geotechnical piling and hole forming bit according to claim 1, wherein: The top of the lower limit seat (7) is provided with a sliding groove (15), and the bottom of the upper limit seat (9) is also provided with a sliding groove (15).
6. A ground penetrating piling and hole forming bit according to claim 5, wherein: The knock block (10) is rotatably installed with a plurality of balls (16) on the top and the bottom, the knock block (10) is slidably connected between the lower limit seat (7) and the upper limit seat (9) through the balls (16) on the top and the bottom, and the part of the ball (16) outside the knock block (10) is slidably connected in one of the sliding grooves (15).