CN213205535U - Rock-entering reaming drilling tool - Google Patents
Rock-entering reaming drilling tool Download PDFInfo
- Publication number
- CN213205535U CN213205535U CN202022165774.3U CN202022165774U CN213205535U CN 213205535 U CN213205535 U CN 213205535U CN 202022165774 U CN202022165774 U CN 202022165774U CN 213205535 U CN213205535 U CN 213205535U
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- China
- Prior art keywords
- drill rod
- hollow drill
- reaming
- rock
- hollow
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- 238000005553 drilling Methods 0.000 title claims abstract description 44
- 239000011435 rock Substances 0.000 claims abstract description 32
- 238000009434 installation Methods 0.000 claims abstract description 16
- 238000007789 sealing Methods 0.000 claims description 13
- 238000011084 recovery Methods 0.000 claims description 11
- 238000009527 percussion Methods 0.000 claims description 5
- 238000010276 construction Methods 0.000 abstract description 8
- 238000005299 abrasion Methods 0.000 abstract description 4
- 239000004567 concrete Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006011 modification reaction Methods 0.000 description 2
- 239000011178 precast concrete Substances 0.000 description 2
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 230000004308 accommodation Effects 0.000 description 1
- 230000000875 corresponding Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
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Abstract
The utility model discloses a go into rock reaming drilling tool, including cavity drilling rod, seal installation in the distribution adapter of cavity drilling rod upper end to and seal installation in the down-the-hole impacter of cavity drilling rod lower extreme, form sealed chamber between the inner wall of distribution adapter, down-the-hole impacter and cavity drilling rod, be equipped with the distribution pipe of intercommunication compressed gas device and sealed chamber on the distribution adapter. Therefore, when meeting the rock stratum, the gas distribution adapter is connected with the compressed gas device, compressed gas is input into the sealed cavity, and the hammer head of the impactor impacts the rock stratum under the driving of compressed air, so that the rock stratum is fractured, the required drilling pressure and the required power head output torque when the drilling teeth cut the rock stratum are reduced, the construction efficiency is improved, and the abrasion of the reaming wing teeth is reduced.
Description
Technical Field
The utility model relates to a pile foundation construction equipment technical field especially relates to a go into rock reaming drilling tool.
Background
The pipe following while drilling method is a middle digging pile sinking method. During construction, the long spiral drill rod connected with the drill bit with the hole expanding function penetrates through the precast tubular pile, and the bottom end of the precast tubular pile is excavated to form a hole. When drilling is needed, the power head rotates forwards, the reaming wing plate of the reaming drill bit is opened, the drill bit rotates to dig soil at a distance below the bottom end of the precast tubular pile, drilling residues are conveyed by the blade of the auger bit to be discharged through the hole of the tubular pile, and the precast tubular pile sinks along with the drill bit by the dead weight during drilling. After the pile is connected by the drill and the pile is connected to the calibrated depth, the power head reversely rotates to withdraw the reaming wing plate for removing the slag, concrete is poured at the pile bottom, the vibration exciter is started to press the prefabricated pipe pile to be seated in the hole bottom, the drill rod is drawn out, and the drilling machine moves.
In the pipe following while drilling method, a drill bit has the functions of reaming the hole diameter and drilling beyond the outer diameter of the precast concrete pile and passing through the inner hole of the precast concrete pile. When the power head rotates forwards, the reaming wing teeth of the drill bit automatically expand; when the power head rotates reversely, the reaming wing teeth of the drill bit retract automatically, and the drilling tool has the function of pouring concrete at the pile bottom.
When a drilling tool needs to enter rock, the existing earth digging and taking drill bit has low drilling efficiency, the abrasion of reaming wing teeth is fast, and even if the output torque of a power head and the downward pressure of the drill bit are increased, the drilling tool is difficult to drill the undergrowth stroke rock. Therefore, a new drilling tool is urgently needed to be matched with a corresponding construction method to improve the construction efficiency of the machine and slow down the abrasion of the reaming wing teeth.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to overcome prior art not enough, provide one kind and improve and creep into efficiency, reduce the rock-entering reaming drilling tool of reaming wing tooth wearing and tearing.
In order to solve the technical problem, the utility model discloses a following technical scheme:
a rock-entering hole-expanding drilling tool comprises a hollow drill rod, a gas distribution adapter and a down-the-hole impacter, wherein the gas distribution adapter is hermetically arranged at the upper end of the hollow drill rod, the down-the-hole impacter is hermetically arranged at the lower end of the hollow drill rod, a sealed cavity is formed among the gas distribution adapter, the down-the-hole impacter and the inner wall of the hollow drill rod, and a gas distribution pipe communicated with a compressed gas device and the sealed; the lower end of the outer wall of the hollow drill rod is provided with an installation part, the installation part is positioned above the percussion drill bit, a reaming wing plate is installed on the installation part, the reaming wing plate has a recovery state and a development state, and the reaming wing plate in the recovery state can penetrate out of the precast pile when the hollow drill rod moves upwards; when the reaming wing plate is in the unfolding state, the distance from the outer side face of the reaming wing plate to the central axis of the hollow drill rod is larger than or equal to the outer radius of the precast pile.
Therefore, when meeting the rock stratum, the gas distribution adapter is connected with the compressed gas device, compressed gas is input into the sealed cavity, the hammer head of the impactor impacts the rock stratum under the driving of compressed air, cracks appear on the rock stratum, so that the required drilling pressure and power head output torque when drilling teeth on the reaming wing plate cut the rock stratum are reduced, the construction efficiency is improved, and the abrasion of the reaming wing teeth is reduced.
In addition, the distribution adapter can also be used as a grouting adapter to finish grouting work.
As a further improvement of the above technical solution:
the installation part comprises two installation plates which extend outwards relative to the outer wall of the hollow drill rod, the two installation plates are arranged up and down, the reaming wing plate is provided with a connecting part which extends towards the hollow drill rod, an accommodating space of the connecting part is formed between the two installation plates, and the connecting part is hinged with the two installation plates through a pin shaft which is vertically arranged; the connecting portion can rotate around the pin shaft to be located in the containing space so that the reaming wing plates are located in the unfolding state, and the connecting portion can rotate around the pin shaft to be unscrewed out of the containing space so that the reaming wing plates are located in the recycling state.
The hollow drill rod is driven to rotate forwards to an unfolded state around the pin shaft, the hollow drill rod is driven to rotate backwards to a recovery state around the pin shaft, and a limiting part for preventing the connecting part from rotating out of the accommodating space is connected between the two mounting plates.
The upper end of the down-the-hole impactor extends into the hollow drill rod and is detachably and fixedly connected with the inner wall of the hollow drill rod, and the lower end of the down-the-hole impactor extends out of the hollow drill rod and is provided with an impact drill bit.
The upper end of the down-the-hole impactor is fixedly connected with the inner wall of the hollow drill rod through a key, a sealing ring for preventing compressed air from leaking is arranged between the outer wall of the down-the-hole impactor and the inner wall of the hollow drill rod, and the sealing ring is arranged above the key.
And an exhaust through hole communicated with the sealing cavity is formed in the down-the-hole impactor. After the compressed air drives the down-the-hole hammer, the residual air is discharged from the front end of the hammer head. The residual air cleans the end face of the hammer head, prevents repeated hammering of rock debris, cools the drilling teeth and is beneficial to discharge of the rock debris.
And the outer wall of the hollow drill rod is provided with a helical blade used for conveying rock debris to the outside of the precast pile pipe from bottom to top.
The upper end of the hollow drill rod is used for being connected with a power head for driving the hollow drill rod to rotate, the upper end of the hollow drill rod penetrates through the power head, and the hollow drill rod can penetrate through the power head, so that the hollow drill rod can be lifted to a positioning space between the hollow drill rod and a foundation through lifting equipment to form a precast pile, and the precast pile can be positioned conveniently. And a stop plate for preventing the hollow drill rod from falling from the power head is arranged at the top end of the hollow drill rod.
Compared with the prior art, the utility model has the advantages of:
the utility model discloses a go into rock reaming drilling tool is connected with the compressed gas device through the distribution adapter, to input compressed gas in the sealed chamber, the impacter strikes the stratum under compressed air drive, makes the stratum produce the crack to required brill pressure and unit head output torque when the drilling tooth cutting stratum on the reducible reaming pterygoid lamina improve the efficiency of construction, slow down the wearing and tearing of reaming wing tooth.
Drawings
Fig. 1 is a schematic structural diagram of a rock-entering reamer (reaming wing plate is expanded) according to an embodiment of the present invention.
Fig. 2 is a schematic view of a partial structure of a rock-entering reamer (reaming wing plate recovery) according to an embodiment of the present invention.
Fig. 3 is a schematic view of the bottom view structure of the rock-entering reamer (reaming wing plate recovery) according to the embodiment of the present invention.
Illustration of the drawings: 1. a gas distribution adapter; 11. a gas distribution pipe; 2. a stopper plate; 3. a hollow drill rod; 31. sealing the cavity; 32. mounting a plate; 33. an accommodating space; 34. a helical blade; 4. a seal ring; 5. a down-the-hole impactor; 6. a key; 7. prefabricating a pile; 8. a pin shaft; 9. reaming wing plates; 91. a connecting portion; 10. a percussive drill bit.
Detailed Description
The invention is further described below with reference to specific preferred embodiments, without thereby limiting the scope of protection of the invention.
Example (b):
as shown in fig. 1-3, the borehole enlarging drill of the present embodiment includes a hollow drill rod 3, an air distribution adapter 1 sealingly mounted at an upper end of the hollow drill rod 3, and a down-hole hammer 5 sealingly mounted at a lower end of the hollow drill rod 3. A sealing cavity 31 is formed among the gas distribution adapter 1, the down-the-hole impacter 5 and the inner wall of the hollow drill rod 3, a gas distribution pipe 11 for communicating the compressed gas device with the sealing cavity 31 is arranged on the gas distribution adapter 1, and an exhaust through hole 51 communicated with the sealing cavity is arranged on the down-the-hole impacter 5.
The drill bit body is internally provided with an impactor, and when the drill bit is positively rotated to drill, the rock stratum is driven to impact by compressed air, so that the rock stratum is cracked, and the drilling resistance is reduced. The sealed cavity 31 forms a compressed air delivery channel to deliver an air source to the front end of the drill bit to drive the down-the-hole hammer 5 to cool the hammer head and the drill teeth.
The outer wall of the hollow drill rod 3 is welded with a helical blade 34 used for conveying rock debris to the outside of the precast pile 7 from bottom to top. In normal drilling, the power head drives the drill stem forward, and the drill cuttings are discharged out of the hole along the channel formed by the helical blade 34.
The upper end of the hollow drill rod 3 is used for being connected with a power head for driving the hollow drill rod 3 to rotate, the upper end of the hollow drill rod 3 penetrates through the power head, and a stop plate 2 for preventing the hollow drill rod 3 from falling from the power head is arranged at the top end of the hollow drill rod 3.
Specifically, the upper end of the down-the-hole impactor 5 extends into the hollow drill rod 3 and is detachably and fixedly connected with the inner wall of the hollow drill rod 3 through a key 6, a sealing ring 4 for preventing compressed air from leaking is arranged between the outer wall of the down-the-hole impactor 5 and the inner wall of the hollow drill rod 3, and the sealing ring 4 is arranged above the key 6. The lower end of the down-the-hole hammer 5 protrudes from the hollow drill rod 3 and is fitted with a percussion drill bit 10.
In this embodiment, the lower end of the outer wall of the hollow drill rod 3 is provided with an installation part hinged with the reaming wing plate 9, the installation part is positioned above the percussion drill 10, and the lower end of the reaming wing plate 9 is provided with drill teeth. The installation department includes two mounting panels 32 that relative cavity drilling rod 3 outer wall outwards extends, and two mounting panels 32 are arranged from top to bottom, and reaming pterygoid lamina 9 has the connecting portion 91 that extends towards cavity drilling rod 3, forms the accommodation space 33 of connecting portion 91 between two mounting panels 32, and connecting portion 91 is articulated with two mounting panels 32 through vertical arrangement's round pin axle 8.
When the hollow drill rod 3 rotates forwards, the reaming wing plates 9 are driven to rotate forwards around the pin shaft 8 to the connecting part 91 to be located in the accommodating space 33, so that the reaming wing plates 9 are located in the unfolded state, and a limiting part for preventing the connecting part 91 from rotating out of the accommodating space 33 is connected between the two mounting plates 32. When the reaming wing plate 9 is in the unfolding state, the distance from the outer side surface of the reaming wing plate 9 to the central axis of the hollow drill rod 3 is larger than or equal to the outer radius of the precast pile 7.
When the hollow drill rod 3 rotates reversely, the reaming wing plates 9 are driven to rotate reversely around the pin shafts 8 to the connecting portion 91 and are screwed out of the accommodating space 33, so that the reaming wing plates 9 are in a recovery state, and the reaming wing plates 9 in the recovery state can penetrate out of the precast pile 7 when the hollow drill rod 3 moves upwards.
Drilling state: the hollow drill rod 3 rotates forwards under the driving of the power head, and the reaming wing plates 9 expand around the pin shaft 8 under the driving force. When meeting the rock stratum, the down-the-hole impactor 5 impacts the rock stratum under the driving of compressed air, so that the rock stratum is cracked, and the drilling teeth on the reaming wing plate 9 cut the rock stratum under the driving of lower pressure and torque of the power head. The cut rock debris is discharged out of the hole through the spiral blade.
The drill lifting state: the designed hole depth is reached, when drilling is finished, the drill rod is driven by the power head to rotate reversely, and the reaming wing plate 9 is retracted around the pin shaft 8 under the action of the driving force. The drill bit is lifted out of the precast tubular pile together with the drill rod.
The down-the-hole hammer at the front end of the drill bit is driven by compressed air to impact the rock stratum, so that the rock stratum is fractured, the bit pressure and the power head output torque required by the cutting of the rock stratum by the drill teeth can be reduced, and the construction efficiency is improved.
After the compressed air drives the down-the-hole hammer, the residual air is discharged through an exhaust through hole at the front end of the hammer head. The residual air cleans the end face of the hammer head, prevents repeated hammering of rock debris, cools the drilling teeth and is beneficial to discharge of the rock debris.
The above description is only for the preferred embodiment of the present application and should not be taken as limiting the present application in any way, and although the present application has been disclosed in the preferred embodiment, it is not intended to limit the present application, and those skilled in the art should understand that they can make various changes and modifications within the technical scope of the present application without departing from the scope of the present application, and therefore all the changes and modifications can be made within the technical scope of the present application.
Claims (8)
1. The rock-entering hole expanding drilling tool is characterized by comprising a hollow drilling rod (3), a gas distribution adapter (1) and a down-the-hole impacter (5), wherein the gas distribution adapter (1) is hermetically mounted at the upper end of the hollow drilling rod (3), the down-the-hole impacter (5) is hermetically mounted at the lower end of the hollow drilling rod (3), a sealing cavity (31) is formed among the gas distribution adapter (1), the down-the-hole impacter (5) and the inner wall of the hollow drilling rod (3), and a gas distribution pipe (11) communicated with a compressed gas device and the sealing cavity (; the lower end of the outer wall of the hollow drill rod (3) is provided with an installation part, the installation part is positioned above the percussion drill bit (10), a reaming wing plate (9) is installed on the installation part, the reaming wing plate (9) has a recovery state and a spreading state, and the reaming wing plate (9) in the recovery state can penetrate out of the precast pile (7) when the hollow drill rod (3) moves upwards; when the reaming wing plate (9) is in the unfolding state, the distance from the outer side surface of the reaming wing plate (9) to the central axis of the hollow drill rod (3) is larger than or equal to the outer radius of the precast pile (7).
2. A rock-entering reaming drill tool according to claim 1, characterized in that the mounting portion comprises two mounting plates (32) extending outwards relative to the outer wall of the hollow drill rod (3), the two mounting plates (32) are arranged up and down, the reaming wing plate (9) has a connecting portion (91) extending towards the hollow drill rod (3), a receiving space (33) of the connecting portion (91) is formed between the two mounting plates (32), and the connecting portion (91) is hinged with the two mounting plates (32) through a vertically arranged pin shaft (8); the connecting portion (91) can rotate around the pin shaft (8) to be located in the accommodating space (33) so that the reaming wing plates (9) are located in the unfolded state, and the connecting portion (91) can rotate around the pin shaft (8) to be unscrewed from the accommodating space (33) so that the reaming wing plates (9) are located in the recovery state.
3. A rock-entering reaming drill tool according to claim 2, characterized in that the reaming wing plate (9) is driven to rotate forward to the unfolded state around the pin (8) when the hollow drill rod (3) rotates forward, the reaming wing plate (9) is driven to rotate backward to the recovery state around the pin (8) when the hollow drill rod (3) rotates backward, and a limiting member for preventing the connecting portion (91) from rotating out of the accommodating space (33) is connected between the two mounting plates (32).
4. A borehole reamer according to claim 1, wherein the upper end of the down-the-hole hammer (5) extends into the hollow drill rod (3) and is detachably and fixedly connected to the inner wall of the hollow drill rod (3), and the lower end of the down-the-hole hammer (5) extends out of the hollow drill rod (3) and is provided with a percussion bit (10).
5. A rock drilling and reaming tool according to claim 4, characterized in that the upper end of the down-the-hole hammer (5) is fixedly connected with the inner wall of the hollow drill rod (3) through a key (6), a sealing ring (4) for preventing compressed air from leaking is arranged between the outer wall of the down-the-hole hammer (5) and the inner wall of the hollow drill rod (3), and the sealing ring (4) is arranged above the key (6).
6. A borehole reamer according to any one of claims 1-5, wherein the down-the-hole hammer (5) is provided with a venting through-hole (51) communicating with the sealed cavity.
7. A rock-entering reamer drill according to any one of claims 1-5, wherein the outer wall of the hollow drill rod (3) is provided with helical blades (34) for conveying rock debris from bottom to top to outside the precast pile (7).
8. A rock drilling and reaming tool according to any one of the claims 1 to 5, characterized in that the upper end of the hollow drill rod (3) is used for connecting with a power head for driving the hollow drill rod (3) to rotate, the upper end of the hollow drill rod (3) penetrates through the power head, and the top end of the hollow drill rod (3) is provided with a stop plate (2) for preventing the hollow drill rod (3) from falling from the power head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022165774.3U CN213205535U (en) | 2020-09-27 | 2020-09-27 | Rock-entering reaming drilling tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022165774.3U CN213205535U (en) | 2020-09-27 | 2020-09-27 | Rock-entering reaming drilling tool |
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| Publication Number | Publication Date |
|---|---|
| CN213205535U true CN213205535U (en) | 2021-05-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202022165774.3U Active CN213205535U (en) | 2020-09-27 | 2020-09-27 | Rock-entering reaming drilling tool |
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| Country | Link |
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| CN (1) | CN213205535U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111980576A (en) * | 2020-09-27 | 2020-11-24 | 山河智能装备股份有限公司 | Rock-entering reaming drilling tool |
-
2020
- 2020-09-27 CN CN202022165774.3U patent/CN213205535U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111980576A (en) * | 2020-09-27 | 2020-11-24 | 山河智能装备股份有限公司 | Rock-entering reaming drilling tool |
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