Self-drilling anchor rod
By introducing helical blades and stop expansion plates into self-drilling anchor bolts, the problem of drill rod bending was solved, and the flatness of the borehole and the anchoring effect were improved.
Patent Information
- Application Number
- CN202422956548.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-02
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2034-12-02
AI Technical Summary
Existing self-drilling anchor bolt structures are relatively simple, which can easily lead to drill rod bending, affecting the flatness of the borehole and the anchoring effect.
A self-drilling anchor bolt was designed, which adopts a spiral blade and stop expansion plate structure. The spiral blade rotates synchronously with the drill bit to discharge drill cuttings. The stop expansion plate is used for positioning to prevent the drill rod from deviating and to quickly discharge drill cuttings during grouting, ensuring the flatness of the borehole and the anchoring effect.
By synchronously rotating the helical blades and positioning the stop expansion plates, drill cuttings accumulation is effectively reduced, ensuring borehole flatness, improving drill rod flatness and anchoring effect, and enhancing construction efficiency.
Smart Images
Figure CN223951763U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of self drilling type anchor rod, especially to a self drilling type anchor rod. BACKGROUND
[0002] Anchor rod support has become an important support mode of highway / railway slope, foundation pit, water and electricity and other ground engineering, and tunnel, stope and other underground engineering, and the traditional anchor rod needs additional drilling and grouting steps in construction, and the construction efficiency is relatively low, and the self drilling type anchor rod integrates drilling, grouting and anchoring functions, is suitable for complex geological conditions, thereby the self drilling type anchor rod has good application value.
[0003] The existing self drilling type anchor rod structure is relatively single, drilling cuttings cannot be discharged from the drill hole in time after drilling, the flatness of drilling is affected, the drill rod appears bending phenomenon, and the anchoring effect is affected.
[0004] Therefore, in view of the problems of the existing self drilling type anchor rod structure being relatively single and the drill rod appearing bending phenomenon, a self drilling type anchor rod can be designed to facilitate the discharge of drilling cuttings, increase the positioning of the drill rod, ensure the flatness of the drill rod and improve the anchoring effect. UTILITY MODEL CONTENTS
[0005] In order to overcome the problems of the existing self drilling type anchor rod structure being relatively single and the drill rod appearing bending phenomenon.
[0006] The technical scheme of the utility model is as follows: a self drilling type anchor rod, comprising an anchor rod body, a mounting pad, the mounting pad and the anchor rod body are sleeved, a connecting sleeve is mounted on the surface of the anchor rod body, a drill bit is arranged at the bottom of the anchor rod body, drilling teeth are arranged at the lower end of the drill bit, helical blades are arranged on the surface of the drill bit, a nut is mounted at the upper end of the surface of the anchor rod body, a grout stopper is arranged below the nut on the surface of the anchor rod body, and a stop expansion piece is arranged on the surface of the connecting sleeve.
[0007] Preferably, in the rotation of the drill bit, the helical blades are synchronously rotated to facilitate the discharge of cuttings, reduce the accumulation of cuttings, ensure the flatness of drilling, ensure the rapid discharge of cuttings when mud is injected, and ensure the anchoring effect.
[0008] Preferably, the anchor rod body is designed in a hollow structure, threads are arranged on the surface of the anchor rod body, a through hole is formed in the surface of the mounting pad, the upper end of the anchor rod body extends to the upper side of the mounting pad through the through hole, and the upper end of the anchor rod body is threadedly connected with the nut.
[0009] Preferably, the upper and lower ends of the connecting sleeve are threadedly connected with the anchor rod body, and the outer diameter of the connecting sleeve is smaller than the outer diameter of the drill bit.
[0010] As preferred, the upper end of the drill bit is detachably connected with the anchor rod body, the upper end face of the drill bit is provided with a butt joint groove, the bottom of the butt joint groove is provided with a grouting hole, and the butt joint groove is threadedly connected with the anchor rod body.
[0011] As preferred, the drilling teeth and the spiral blades are arranged in a ring array, and the outer diameter of the spiral blades is matched with the drilling teeth.
[0012] As preferred, the grouting stopper is designed in a conical structure, the grouting stopper is sleeved with the anchor rod body, and the outer diameter of the grouting stopper is matched with the drilling teeth.
[0013] As preferred, the position-stopping expansion sheet is arranged in a ring array, and the outer side of the surface of the position-stopping expansion sheet is provided with anti-skid protrusions.
[0014] The self-drilling anchor rod has the advantages that:
[0015] The self-drilling anchor rod has the advantages that: BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 The self-drilling anchor rod is shown as a whole structure schematic view Figure 1 ;
[0017] Figure 2 The self-drilling anchor rod is shown as a whole structure schematic view Figure 2 ;
[0018] Figure 3 The self-drilling anchor rod is shown as a whole structure schematic view
[0019] Figure 4 The self-drilling anchor rod is shown as a whole structure schematic view
[0020] Mark 1, anchor rod body; 2, coupling sleeve; 3, mounting pad; 4, drill bit; 5, drilling teeth; 6, spiral blade; 7, nut; 8, grouting stopper; 9, position-stopping expansion sheet. DETAILED DESCRIPTION
[0021] The self-drilling anchor rod will be further described below in combination with the drawings and embodiments.
[0022] Please refer to Figures 1-4The utility model provides a kind of embodiment: a self-drilling type anchor rod, including anchor rod body 1, further including mounting pad plate 3, mounting pad plate 3 and anchor rod body 1 sleeve connection, the surface of anchor rod body 1 is equipped with coupling sleeve 2, the bottom of anchor rod body 1 is provided with drill bit 4, the lower end of drill bit 4 is provided with drilling tooth 5, the surface of drill bit 4 is provided with helical blade 6, the upper end of anchor rod body 1 surface is equipped with nut 7, anchor rod body 1 is hollow structure design, the surface of anchor rod body 1 is provided with screw thread, the surface of mounting pad plate 3 is provided with through hole, the upper end of anchor rod body 1 extends to the upper of mounting pad plate 3 by through hole, and the upper end of anchor rod body 1 and nut 7 are threadedly connected, the surface of anchor rod body 1 is below nut 7 and is provided with stop plug 8, the surface of coupling sleeve 2 is provided with stop expansion sheet 9, in the rotation of drill bit 4, by the synchronous rotation of helical blade 6, it is convenient to chip removal, reduce the accumulation of drill cuttings, guarantee the flatness of drilling, and when injecting slurry, guarantee the rapid discharge of drill cuttings, guarantee anchoring effect.
[0023] Please refer to Figure 1 And Figure 4 In the embodiment, the upper and lower ends of the coupling sleeve 2 are threadedly connected with the anchor rod body 1, the outer diameter of the coupling sleeve 2 is smaller than the outer diameter of the drill bit 4, the upper end of the drill bit 4 is detachably connected with the anchor rod body 1, the upper end surface of the drill bit 4 is provided with a butt joint groove, the bottom of the butt joint groove is provided with a grouting hole, the butt joint groove is threadedly connected with the anchor rod body 1, the drilling tooth 5 and the helical blade 6 are arranged in an annular array, the outer diameter of the helical blade 6 is adapted to the drilling tooth 5, the drill bit 4 is threadedly connected with the anchor rod body 1, which facilitates the disassembly and replacement of the drill bit 4, improves flexibility, and in the rotation of the drill bit 4, the helical blade 6 is synchronously driven to rotate, ensuring the chip removal effect.
[0024] Please refer to Figure 2 And Figure 3 In the embodiment, the stop plug 8 is designed in a conical structure, the stop plug 8 is sleeved with the anchor rod body 1, the outer diameter of the stop plug 8 is adapted to the drilling tooth 5, the stop expansion sheet 9 is arranged in an annular array, the outer side of the surface of the stop expansion sheet 9 is provided with an anti-skid protrusion, the stop expansion sheet 9 can position the coupling sleeve 2, increase the flatness of the drill rod, prevent bending, and at the same time in anchoring, the stop expansion sheet 9 is inserted into the slurry, increasing the anchoring effect.
[0025] In the work, the self-drilling anchor rod and drilling equipment are connected, the drilling operation is realized by the drill bit 4, the hollow structure of the anchor rod body 1 facilitates the synchronous injection of the mud, which flows out at the drill bit 4, realizes the synchronous drilling and grouting, and in the rotation of the drill bit 4, the helical blade 6 is driven to rotate synchronously, which facilitates the chip removal, reduces the accumulation of drillings, ensures the flatness of the drilling, and ensures the rapid discharge of the drillings when the mud is injected, ensures the anchoring effect, and at the same time, the stop expansion sheet 9 is used to form positioning for the connecting sleeve 2, avoids the deviation of the drill rod, ensures the flatness of the drill rod, and the stop expansion sheet 9 is inserted into the mud to form limiting, improves the anchoring effect, the threaded connection of the drill bit 4 and the anchor rod body 1 facilitates the disassembly and replacement of the drill bit 4, and improves the flexibility.
[0026] Through the above steps, in the rotation of the drill bit 4, the helical blade 6 is synchronously rotated to facilitate the chip removal, reduce the accumulation of drillings, ensure the flatness of the drilling, and ensure the rapid discharge of the drillings when the mud is injected, ensure the anchoring effect, so as to solve the problem that the existing self-drilling anchor rod structure is single and easy to cause the bending of the drill rod.
Claims
1. A self-drilling rock bolt comprising a rock bolt body (1), characterized in that: Also include the installation of the base plate (3), the installation of the base plate (3) and the anchor rod body (1) sleeve, the surface of the anchor rod body (1) is provided with a coupling sleeve (2), the bottom of the anchor rod body (1) is provided with a drill bit (4), the lower end of the drill bit (4) is provided with a drilling tooth (5), the surface of the drill bit (4) is provided with a spiral blade (6), the upper end of the surface of the anchor rod body (1) is provided with a nut (7), the surface of the anchor rod body (1) below the nut (7) is provided with a stop plug (8), the surface of the coupling sleeve (2) is provided with a stop expansion piece (9).
2. A self-drilling rock bolt according to claim 1, characterised in that: The anchor rod body (1) is designed as a hollow structure, the surface of the anchor rod body (1) is provided with a thread, the surface of the installation base plate (3) is provided with a through hole, the upper end of the anchor rod body (1) extends above the installation base plate (3) through the through hole, and the upper end of the anchor rod body (1) is threadedly connected with the nut (7).
3. A self-drilling rock bolt according to claim 1, characterised in that: The upper and lower ends of the coupling sleeve (2) are threadedly connected with the anchor rod body (1), and the outer diameter of the coupling sleeve (2) is smaller than the outer diameter of the drill bit (4).
4. A self-drilling rock bolt according to claim 1, characterised in that: The upper end of the drill bit (4) is detachably connected with the anchor rod body (1), the upper end surface of the drill bit (4) is provided with a butt joint groove, the bottom of the butt joint groove is provided with a grouting hole, and the butt joint groove is threadedly connected with the anchor rod body (1).
5. A self-drilling rock bolt according to claim 1, characterised in that: The drilling tooth (5) and the spiral blade (6) are arranged in an annular array, and the outer diameter of the spiral blade (6) is adapted to the drilling tooth (5).
6. A self-drilling rock bolt according to claim 1, characterised in that: The stop plug (8) is designed as a conical structure, the stop plug (8) is sleeved with the anchor rod body (1), and the outer diameter of the stop plug (8) is adapted to the drilling tooth (5).
7. A self-drilling rock bolt according to claim 1, characterised in that: The stop expansion piece (9) is arranged in an annular array, and the outer side of the surface of the stop expansion piece (9) is provided with anti-skid protrusions.