CN212359616U - Low-disturbance hole forming device for soft mudstone anchor rod/cable hole - Google Patents
Low-disturbance hole forming device for soft mudstone anchor rod/cable hole Download PDFInfo
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- CN212359616U CN212359616U CN202021859944.1U CN202021859944U CN212359616U CN 212359616 U CN212359616 U CN 212359616U CN 202021859944 U CN202021859944 U CN 202021859944U CN 212359616 U CN212359616 U CN 212359616U
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Abstract
The utility model relates to a low disturbance pore-forming device in soft mudstone stock/cable hole, above-mentioned device includes: the drilling machine comprises a plurality of hollow outer drill rods which can be connected with each other, wherein a pore-forming drill bit is arranged at one end of each outer drill rod; the inner drill rod is arranged in the outer drill rod and can rotate along the axial lead of the outer drill rod, a water flow channel is arranged in the inner drill rod along the length direction of the inner drill rod, and a spiral wing is arranged on the inner drill rod; and the crushing drill bit is arranged at one end of the inner drill rod, which is relatively close to the pore-forming drill bit, and is provided with a water outlet hole which is communicated with the water flow channel. The utility model discloses the form of going out water between well adoption interior drilling rod intaking, interior drilling rod and outer drilling rod inner wall realizes the drill bit cooling, and above-mentioned cooling form can prevent in the pore wall that the country rock leads to the problem that intensity reduces or even softens and collapses because of a large amount of soaks.
Description
Technical Field
The utility model relates to a tunnel engineering stock/cable installation pore-forming engineering field, concretely relates to low disturbance pore-forming device in soft mudstone stock/cable hole.
Background
During tunnel construction, a pneumatic rock drill is adopted to cool and remove slag in a water-adding flushing mode in the hole forming process of the anchor rod-anchor cable.
The tunnel construction meets weak mudstone often, just is not suitable for under this condition to adopt the mode of directly adding water and washing to cool down and arrange the sediment, this is mainly because traditional pneumatic rock drill adds water and washes the in-process water and flow out through the clearance of drilling rod and pore wall after the drilling rod flows into the hole bottom, and this can cause the country rock to soak in a large number, also makes the mudstone meet water and soften rapidly even inflation simultaneously, has not only aggravated the difficult degree of slagging tap to it is very unfavorable to the later stage stable control of country rock.
SUMMERY OF THE UTILITY MODEL
Aiming at the problems, the low-disturbance pore-forming device for the soft mudstone anchor rod/cable hole is provided so as to improve the pore-forming efficiency by means of auxiliary slag discharge inside the drill rod and flushing and cooling of the passage in the drill rod.
The specific technical scheme is as follows:
a low disturbance hole forming device for soft mudstone anchor/cable holes, characterized by comprising:
the drilling machine comprises a plurality of hollow outer drill rods which can be connected with each other, wherein a pore-forming drill bit is arranged at one end of each outer drill rod;
the inner drill rod is arranged in the outer drill rod and can rotate along the axial lead of the outer drill rod, a water flow channel is arranged in the inner drill rod along the length direction of the inner drill rod, and a spiral wing is arranged on the inner drill rod; and
broken drill bit, broken drill bit install in the drilling rod be close to pore-forming drill bit one relatively serve, and be equipped with the apopore on the broken drill bit, apopore and rivers passageway intercommunication.
The low-disturbance pore-forming device also has the characteristic that a plurality of spiral grooves are formed in the crushing drill bit.
The low-disturbance pore-forming device is characterized in that one end of the outer drill rod is provided with a first threaded joint, the other end of the outer drill rod is provided with a second threaded joint, and the pore-forming drill bit is spirally arranged on the outer drill rod through the first threaded joint.
The low-disturbance pore-forming device also has the characteristics that the pore-forming device further comprises a plurality of support rods and a plurality of support bearings, the support bearings are mounted on the inner drill rod at intervals, one end of each support rod is mounted on the inner wall of the outer drill rod, and the other end of each support rod extends and is connected to the bearing outer ring of each support bearing.
The low-disturbance hole forming device also has the characteristic that the support bearing is a conical bearing.
The low-disturbance pore-forming device also has the characteristic that the pore-forming drill bit is made of diamond.
The beneficial effect of above-mentioned scheme is:
1) the utility model adopts the forms of water inlet of the inner drill rod and water outlet between the inner drill rod and the inner wall of the outer drill rod to realize the cooling of the drill bit, and the cooling form can prevent the problem of strength reduction and even softening and collapse caused by a large amount of water immersion of surrounding rock in the hole wall;
2) the utility model discloses be provided with the spiral wing structure on the well interior drilling rod to realize the inside row's of outer drilling rod sediment, compare traditional singly by rivers washing sediment mode higher row's sediment efficiency with this acquisition.
Drawings
Fig. 1 is a schematic structural diagram of a low-disturbance hole forming device provided in an embodiment of the present invention;
fig. 2 is a schematic sectional view along the line a-a in fig. 1.
In the drawings: 1. an outer drill rod; 2. a hole-forming drill bit; 3. an inner drill rod; 4. a water flow channel; 5. a helical fin; 6. crushing the drill bit; 7. a water outlet hole; 8. a spiral groove; 9. a first threaded joint; 10. a second threaded joint; 11. a support bar; 12. and supporting the bearing.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.
The present invention will be further described with reference to the accompanying drawings and specific embodiments, but the present invention is not limited thereto.
Fig. 1 is a schematic structural diagram of a low-disturbance hole forming device provided in an embodiment of the present invention; fig. 2 is a schematic sectional view along the line a-a in fig. 1. As shown in fig. 1 and fig. 2, a low-disturbance hole forming device provided in an embodiment of the present invention includes: a plurality of hollow outer drill rods 1 which can be connected with each other, wherein one end of each outer drill rod 1 is provided with a pore-forming drill bit 2 (made of diamond); the inner drill rod 3 is arranged in the outer drill rod 1, the inner drill rod 3 can rotate along the axial lead of the outer drill rod 1, a water flow channel 4 is arranged in the inner drill rod 3 along the length direction of the inner drill rod 3, and a spiral wing 5 is arranged on the inner drill rod 3; and the crushing drill bit 6, the crushing drill bit 6 is installed on one end of the inner drill rod 3 relatively close to the pore-forming drill bit 2, a water outlet hole 7 is formed in the crushing drill bit 6, and the water outlet hole 7 is communicated with the water flow channel 4.
The utility model discloses in can install the pole end connection on interior drilling rod 3 to utilize the pole end connection for 3 interior rivers ways of interior drilling rod 4 supplies water in still can provide the point of application of force for drive arrangement.
The utility model discloses in can drill the pore-forming when outer drilling rod 1 and interior drilling rod 3 drive and carry out the antiport under corresponding drive arrangement, the shale sediment dashes out outer drilling rod 1 outside with the help of the antiport effect of helical fin 5 during the pore-forming after will breaking.
The utility model discloses in when boring bit 2 and broken bit 6 creeps into the pore-forming rivers that flow through rivers passageway 4, apopore 7 in proper order cool off the drill bit, cooling back rivers flow through clearance between outer drilling rod 1 and interior drilling rod 3, above-mentioned cooling method is washed the slag discharging mode than traditional rivers and can be prevented that the wall rock leads to intensity reduction or even softens the problem of collapsing because of a large amount of soaking in water in the pore wall.
Specifically, the utility model discloses the one end of outer drilling rod 1 is equipped with first screwed joint 9 in china and abroad, and the other end of outer drilling rod 1 is equipped with second screwed joint 10, the utility model discloses well drill bit 2 is on outer drilling rod 1 through 9 spiral installations of first screwed joint, and upper and lower adjacent outer drilling rod 1 within a definite time usable above-mentioned screwed joint lasts each other to satisfy different drilling depth's operation needs.
Specifically, the utility model discloses well pore-forming device still includes a plurality of bracing pieces 11 and a plurality of support bearing 12, the utility model discloses well support bearing 12 (can be conical bearing) interval is installed on interior drilling rod 3, and 11 one ends of bracing piece are installed on 1 inner wall of outer drilling rod, and the bracing piece 11 other end extends and is connected on support bearing 12's the bearing outer lane.
On the basis of the technical scheme, furthermore, the broken drill bit 6 in the low-disturbance hole forming device provided by the embodiment is also provided with a plurality of spiral grooves 8 so as to utilize broken mudstone.
The utility model discloses in utilize above-mentioned low disturbance pore-forming device pore-forming method to do:
s1, connecting a plurality of outer drill rods 1 according to the depth requirement;
s2, injecting cooling water into the water flow channel 4, and enabling the water flow to flow out through the water flow channel 4 and the water outlet in sequence, so as to cool the hole-forming drill bit 2 and the crushing drill bit 6;
s3, the outer drill rod 1 and the inner drill rod 3 are driven to rotate reversely, so that the broken mudstone and rock dregs are flushed out of the outer drill rod 1 by the reverse rotation action of the spiral wing 5 while the hole-forming drill bit 2 is used for breaking rock and drilling holes;
and S4, drilling to the designed depth.
The above is only a preferred embodiment of the present invention, and not intended to limit the scope of the invention, and it should be appreciated by those skilled in the art that various equivalent substitutions and obvious changes made in the specification and drawings should be included within the scope of the present invention.
Claims (6)
1. A low disturbance pore-forming device in soft mudstone stock/cable hole, characterized by that, includes:
the drilling machine comprises a plurality of hollow outer drill rods (1) which can be connected with each other, wherein a pore-forming drill bit (2) is arranged at one end of each outer drill rod (1);
the inner drill rod (3) is installed in the outer drill rod (1), the inner drill rod (3) can rotate along the axial lead of the outer drill rod (1), a water flow channel (4) is arranged in the inner drill rod (3) along the length direction of the inner drill rod (3), and a spiral wing plate (5) is arranged on the inner drill rod (3); and
broken drill bit (6), broken drill bit (6) install in interior drilling rod (3) are close to relatively one of pore-forming drill bit (2) is served, just be equipped with apopore (7) on broken drill bit (6), apopore (7) with rivers passageway (4) intercommunication.
2. A low-disturbance hole-forming device according to claim 1, characterized in that a plurality of spiral grooves (8) are further formed on the crushing drill bit (6).
3. A low-disturbance hole-forming device according to claim 1 or 2, characterized in that one end of the outer drill rod (1) is provided with a first threaded joint (9), the other end of the outer drill rod (1) is provided with a second threaded joint (10), and the hole-forming drill bit (2) is screwed on the outer drill rod (1) through the first threaded joint (9).
4. The low-disturbance hole forming device according to claim 3, further comprising a plurality of support rods (11) and a plurality of support bearings (12), wherein the support bearings (12) are installed on the inner drill rod (3) at intervals, one end of each support rod (11) is installed on the inner wall of the outer drill rod (1), and the other end of each support rod (11) extends and is connected to a bearing outer ring of the support bearing (12).
5. A low-disturbance hole-forming device according to claim 4, characterized in that the support bearing (12) is a conical bearing.
6. A low-disturbance hole-forming device according to claim 4 or 5, characterized in that the hole-forming drill (2) is made of diamond.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021859944.1U CN212359616U (en) | 2020-08-31 | 2020-08-31 | Low-disturbance hole forming device for soft mudstone anchor rod/cable hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021859944.1U CN212359616U (en) | 2020-08-31 | 2020-08-31 | Low-disturbance hole forming device for soft mudstone anchor rod/cable hole |
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| Publication Number | Publication Date |
|---|---|
| CN212359616U true CN212359616U (en) | 2021-01-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021859944.1U Active CN212359616U (en) | 2020-08-31 | 2020-08-31 | Low-disturbance hole forming device for soft mudstone anchor rod/cable hole |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111877981A (en) * | 2020-08-31 | 2020-11-03 | 中国科学院武汉岩土力学研究所 | Low-disturbance hole forming device and method for soft mudstone anchor rod/cable hole |
| CN114000534A (en) * | 2021-12-10 | 2022-02-01 | 国网青海省电力公司 | Spiral anchor foundation structure of transmission line tower of Gobi gravel soil foundation |
-
2020
- 2020-08-31 CN CN202021859944.1U patent/CN212359616U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111877981A (en) * | 2020-08-31 | 2020-11-03 | 中国科学院武汉岩土力学研究所 | Low-disturbance hole forming device and method for soft mudstone anchor rod/cable hole |
| CN114000534A (en) * | 2021-12-10 | 2022-02-01 | 国网青海省电力公司 | Spiral anchor foundation structure of transmission line tower of Gobi gravel soil foundation |
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