CN210118111U - Single-action double-tube impact core drill - Google Patents
Single-action double-tube impact core drill Download PDFInfo
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- CN210118111U CN210118111U CN201822168175.XU CN201822168175U CN210118111U CN 210118111 U CN210118111 U CN 210118111U CN 201822168175 U CN201822168175 U CN 201822168175U CN 210118111 U CN210118111 U CN 210118111U
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Abstract
The single-acting double-pipe percussion core drilling tool is used for realizing percussion drilling to quickly drill the original-state stratum rock core, well ensuring the original state of the adopted rock core, and the original-state stratum rock core is not disturbed. The outer pipe assembly of the impact core drill comprises a drill outer pipe, an impactor upper joint and an impact core drill bit, wherein the middle part of the impactor upper joint is connected with the upper end of the drill outer pipe through threads, and the lower end of the drill outer pipe is connected with the core drill bit through threads; the lower part of the upper connector of the impactor extends into the inner cavity of the outer pipe of the drilling tool, a connecting assembly is mounted on the upper connector, and a bearing is fixedly arranged at the lower end of the connecting assembly; the coring inner pipe assembly is positioned in the inner cavity of the outer pipe of the drilling tool, a gap exists between the annular outer wall of the coring inner pipe assembly and the annular side wall of the inner cavity of the outer pipe of the drilling tool, the upper end of the coring inner pipe assembly is connected with the inner ring of the bearing, and the coring inner pipe assembly does not rotate along with the outer pipe of the drilling tool.
Description
Technical Field
The utility model relates to a probing machines, in particular to single-action double-barrelled core drill that strikes can realize strikeing the drilling and get original state stratum core fast, and guarantee the original state nature of the core of taking well.
Background
The railway tunnel engineering occupies a very important proportion in railway construction, is a controlled engineering in the railway construction engineering, and the safe construction of the railway tunnel engineering, which not only directly influences the smooth operation of the whole engineering, but also directly relates to the investment and the progress of the whole railway engineering.
In advance geological forecast of railway tunnels, various strata with different time causes, different structures, different lithologies and the like can be encountered, the hardness of surrounding rocks changes from extremely soft rocks, soft rocks to hard rocks and extremely hard rocks, the integrity of the surrounding rocks is extremely broken and is broken to be relatively complete and complete, and even extreme geological conditions such as karst caves, fractures and the like can be encountered. The traditional drilling method mainly adopts rotary drilling of diamond and hard alloy and drilling and coring by mud wall protection, but the technical problems of difficult core taking and the like generally exist due to the complex stratum structure and lithology.
Some domestic units adopt an impact core drill, break rock stratums under the action of impact rotation, and press broken rock powder into a rock core pipe through extrusion. The method can take rock dust samples of the stratum, but has the following obvious disadvantages: (1) the core sample can not keep the original state of the stratum, and the error of the character of the rock-soil layer is large. (2) Since the rock dust sample enters the core barrel through extrusion, taking the sample out of the core barrel is labor-consuming and time-consuming. (3) The inner core pipe rotates along with the outer pipe, so that the core entering the core pipe is disturbed for many times, and the adopted rock and soil sample is damaged again.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a double-barrelled impact core drill tool is provided to realize strikeing the drilling and get original state stratum core fast, and guarantee the original state nature of the core of taking well, original state stratum core does not receive the disturbance moreover.
The utility model provides a technical scheme that its technical problem adopted as follows:
the utility model discloses a double-barrelled impact core drill of single action, characterized by: the outer pipe assembly of the impact core drill comprises a drill outer pipe, an impactor upper joint and an impact core drill bit, wherein the middle part of the impactor upper joint is connected with the upper end of the drill outer pipe through threads, and the lower end of the drill outer pipe is connected with the core drill bit through threads; the lower part of the upper connector of the impactor extends into the inner cavity of the outer pipe of the drilling tool, a connecting assembly is mounted on the upper connector, and a bearing is fixedly arranged at the lower end of the connecting assembly; the coring inner pipe assembly is positioned in the inner cavity of the outer pipe of the drilling tool, a gap exists between the annular outer wall of the coring inner pipe assembly and the annular side wall of the inner cavity of the outer pipe of the drilling tool, the upper end of the coring inner pipe assembly is connected with the inner ring of the bearing, and the coring inner pipe assembly does not rotate along with the outer pipe of the drilling tool.
The utility model has the advantages that the outer tube assembly of the impact core drill tool rotates along with the drill rod, while the inner tube assembly of the core drill tool does not rotate along with the outer tube of the drill tool, thereby not only adopting impact drilling to quickly drill the rock core, but also ensuring the original state of the rock core; the drilling tool is simple to operate, is very suitable for percussion drilling coring construction, and has wide application prospect.
Drawings
The specification includes the following four figures:
FIG. 1 is a schematic view of a single-acting double-tube percussion core drill according to the present invention;
FIG. 2 is a schematic view of the external structure of the single-acting double-tube percussion core drill of the present invention;
FIG. 3 is a schematic view of the internal structure of the single-acting double-tube percussion core drill of the present invention;
FIG. 4 is a schematic view of the air flow path of the single-acting double-barreled percussion core drill of the present invention;
the figures show the components and corresponding references: the outer pipe 10 of the percussion coring drill, the upper connector 11 of the impactor, the percussion coring bit 12, a bearing seat 13, a connecting shaft 14, a hexagonal thick nut 15, a gasket 16, a bearing 17, a coring semi-closed inner pipe 20, an upper clamping ring 21, a lower clamping ring 22 and an upper connector 23 of the inner pipe.
Detailed Description
The single-acting double-tube percussion core drill of the present invention will be further described with reference to the accompanying drawings and embodiments.
Referring to fig. 1 and 2, the single-acting double-tube percussion coring bit of the present invention includes an outer tube assembly and an inner tube assembly. The outer pipe assembly of the impact core drill comprises an outer pipe 10 of the drill, an upper joint 11 of an impactor and an impact core drill bit 12, wherein the middle part of the upper joint 11 of the impactor is connected with the upper end of the outer pipe 10 of the drill through threads, and the lower end of the outer pipe 10 of the drill is connected with the core drill bit 12 through threads. The lower part of the upper connector 11 of the impactor extends into the inner cavity of the outer pipe 10 of the drilling tool, a connecting assembly is mounted on the upper part, and a bearing 17 is fixedly arranged at the lower end of the connecting assembly. The coring inner tube assembly is positioned in the inner cavity of the outer tube 10 of the drilling tool, a gap exists between the annular outer wall of the coring inner tube assembly and the annular side wall of the inner cavity of the outer tube 10 of the drilling tool, the upper end of the coring inner tube assembly is connected with the inner ring of the bearing 17, and the coring inner tube assembly does not rotate along with the outer tube 10 of the drilling tool.
Referring to fig. 1, the impacter upper joint 11 upper end is passed through the keyway and is connected with coring impacter lower extreme, and the outer tube assembly of percussion coring bit rotates along with the drilling rod, and the coring inner tube assembly does not rotate along with the drilling tool outer tube, can adopt to strike to creep into and bore out the core fast, and the undisturbed stratum core does not receive the disturbance moreover to guarantee the original state nature of the core of taking well.
Referring to fig. 3, the coring inner tube assembly is composed of a coring inner tube, an upper clamping ring 21, a lower clamping ring 22 and an inner tube upper joint 23, the coring inner tube is formed by combining two coring semi-closed inner tubes 20, the upper end and the lower end of the coring inner tube are respectively fixed by the upper clamping ring 21 and the lower clamping ring 22, the inner tube upper joint 23 is installed at the upper end of the coring inner tube, and the upper end of the inner tube upper joint 23 is inserted into an inner ring of the bearing 17.
Referring to fig. 2, the coupling assembly is composed of a bearing housing 13, a coupling shaft 14, a hexagonal thick nut 15, and a washer 16. The upper portion of the connecting shaft 14 having the lower step portion passes through the core hole of the bearing housing 13 and is fastened and fixed by a hexagonal thick nut 15. The spacer 16 is disposed between the bottom surface of the bearing housing 13 and the top surface of the lower step portion. The lower step portion has an inner bore to which the outer ring of the bearing 17 is tightly fitted.
Referring to fig. 1, before the core inner tube assembly is installed, the percussion coring bit 12 is removed from the outer tube assembly of the core drill, the inner tube upper joint 23 is inserted into the inner ring of the bearing 17, the core inner tube assembly is installed in the inner cavity of the outer tube 10 of the drill, and the percussion coring operation is performed after the percussion coring bit 12 is installed. When the rock core is withdrawn, the impact coring bit 12 is detached, the coring inner tube assembly is taken out from the inner cavity of the outer tube 10 of the drilling tool, the upper clamping ring 21 and the lower clamping ring 22 are detached from the coring inner tube, and the two buckled coring semi-closed inner tubes 20 are disassembled to obtain the complete rock core.
Referring to fig. 4, as can be seen from the operation path of the air path, the core sample is protected well because the operating air does not directly contact the core.
The above description is only used for illustrating some principles of the single-acting double-tube percussion core drill tool, and the present invention is not limited to the specific structure and the application range shown and described, so all the corresponding modifications and equivalents that may be utilized belong to the patent scope applied by the present invention.
Claims (3)
1. Single-action double-tube impact core drill bit, characterized by: the outer pipe assembly of the impact core drill comprises an outer pipe assembly of the impact core drill and an inner pipe assembly of the core drill, wherein the outer pipe assembly of the impact core drill comprises an outer pipe (10) of the drill, an upper connector (11) of an impactor and an impact core drill bit (12), the middle part of the upper connector (11) of the impactor is connected with the upper end of the outer pipe (10) of the drill through threads, and the lower end of the outer pipe (10) of the drill is connected with the core drill bit (12) through; the lower part of the upper connector (11) of the impactor extends into the inner cavity of the outer pipe (10) of the drilling tool, a connecting assembly is mounted on the upper part of the upper connector, and a bearing (17) is fixedly arranged at the lower end of the connecting assembly; the coring inner pipe assembly is positioned in the inner cavity of the outer pipe (10) of the drilling tool, a gap exists between the annular outer wall of the coring inner pipe assembly and the annular side wall of the inner cavity of the outer pipe (10) of the drilling tool, the upper end of the coring inner pipe assembly is connected with the inner ring of the bearing (17), and the coring inner pipe assembly does not rotate along with the outer pipe (10) of the drilling tool.
2. The single-acting dual-tube percussion coring bit of claim 1, wherein: the coring inner pipe assembly is composed of a coring inner pipe, an upper clamping ring (21), a lower clamping ring (22) and an inner pipe upper joint (23), the coring inner pipe is formed by two coring semi-closed inner pipes (20) in a combined mode, the upper end and the lower end of the coring inner pipe are fixed by the upper clamping ring (21) and the lower clamping ring (22) respectively, the inner pipe upper joint (23) is installed at the upper end of the coring inner pipe, and the upper end of the inner pipe upper joint (23) is connected with an inner ring of a bearing (17) in an inserted mode.
3. The single-acting dual-tube percussion coring bit of claim 1, wherein: the connecting assembly is composed of a bearing seat (13), a connecting shaft (14), a hexagonal thick nut (15) and a gasket (16), wherein the upper part of the connecting shaft (14) with a lower step part penetrates through a center hole of the bearing seat (13) and is locked and fixed by the hexagonal thick nut (15); the gasket (16) is arranged between the bottom surface of the bearing seat (13) and the top surface of the lower step part; the lower step part is provided with an inner hole, and an outer ring of the bearing (17) is connected with the inner hole in a tight fit manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822168175.XU CN210118111U (en) | 2018-12-24 | 2018-12-24 | Single-action double-tube impact core drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822168175.XU CN210118111U (en) | 2018-12-24 | 2018-12-24 | Single-action double-tube impact core drill |
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| Publication Number | Publication Date |
|---|---|
| CN210118111U true CN210118111U (en) | 2020-02-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822168175.XU Active CN210118111U (en) | 2018-12-24 | 2018-12-24 | Single-action double-tube impact core drill |
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| Country | Link |
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| CN (1) | CN210118111U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109538147A (en) * | 2018-12-24 | 2019-03-29 | 中铁二院工程集团有限责任公司 | Single-action twin-pipes impact core bit |
| CN113513255A (en) * | 2021-07-27 | 2021-10-19 | 福建岩土工程勘察研究院有限公司 | Core drill for deep-ice bedrock |
-
2018
- 2018-12-24 CN CN201822168175.XU patent/CN210118111U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109538147A (en) * | 2018-12-24 | 2019-03-29 | 中铁二院工程集团有限责任公司 | Single-action twin-pipes impact core bit |
| CN113513255A (en) * | 2021-07-27 | 2021-10-19 | 福建岩土工程勘察研究院有限公司 | Core drill for deep-ice bedrock |
| CN113513255B (en) * | 2021-07-27 | 2024-01-12 | 福建岩土工程勘察研究院有限公司 | Deep-ice bedrock core drill |
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