Core drilling tool system for tunnel inverted arch concrete filling surface

Abstract

The utility model relates to a coring drilling tool system for a tunnel inverted arch concrete filling surface, which comprises a coring drill bit device, a coring pipe section device and a multifunctional crawler drilling machine, and is characterized in that the coring drill bit device comprises a drill bit part and a pipe section connecting part connected with the drill bit part; the coring pipe section device comprises a drill bit connecting part positioned at the front end, a coring pipe section part positioned in the middle and a drilling machine connecting part positioned at the tail end, the drill bit connecting part and the pipe section connecting part are respectively provided with matched male and female screw threads so as to be connected with each other, and the drilling machine connecting part is connected with the multifunctional crawler drilling machine. A traditional coring mode can be replaced, a coring pipe section device with the length of 2-3.5 m can be connected at a time through the multifunctional crawler drilling machine, concrete on the filling face of the inverted arch can be drilled through at a time in cooperation with the multifunctional crawler drilling machine, the feeding speed is high, repeated circulation operation is avoided, and the coring efficiency is high.

Description

Technical Field

[0001] The utility model relates to the technical field of core sampling for the concrete filling surface of the invert in tunnels, and particularly relates to a core sampling drill system for the concrete filling surface of the tunnel invert. Background Art

[0002] With the increasing scale of railway construction, there are more and more high-speed railway tunnels. When the overall structure of the tunnel has been constructed and drilling and grouting treatment is carried out for the karst area under the tunnel invert, before drilling, it is necessary to use a core sampling device to take cores from the concrete filling surface of the tunnel invert. The core sampling length is generally 2 - 2.5 m. After core sampling is completed, a drilling device is used for drilling. After reaching the design depth, a sleeve valve pipe is set for karst grouting treatment.

[0003] In the core sampling process for the concrete filling surface of the tunnel invert, the traditional core sampling device selects the GXY-2Q hundred-meter geological crawler drill. The core sampling length is about 0.8 - 1.0 m each time. Therefore, when the core sampling length is 2 - 2.5 m, it is necessary to cycle back and forth 3 times to complete the core sampling operation. In addition, the core sampling drill bit and the core sampling pipe wall of the existing drill are both relatively thin, the core sampling operation efficiency is slow, and the drill consumption is large. During the core sampling process, if iron obstacles such as steel bars and small ducts are encountered, the drill bit will be stuck and unable to drill. Then it is very difficult to drill down this hole, and it is necessary to shift the position and re-open the hole for core sampling, thus slowing down the core sampling construction progress and greatly consuming time, manpower and material resources.

[0004] For example, patent application 202321259994.X discloses a tunnel core sampling impact drill, which includes an impact drill frame, a core sampling drill frame, a transverse movement frame, a column, a power assembly and an assembly platform; the column and the power assembly are arranged on the assembly platform; the impact drill frame, the core sampling drill frame and the transverse movement frame are all connected to the power assembly; the transverse movement frame is movably arranged on the column to realize lifting and transverse movement relative to the column; the core sampling drill frame is arranged on the transverse movement frame, and the impact drill frame is detachably arranged on the core sampling drill frame; the impact drill frame is configured to be able to complete impact drilling operations. However, the tunnel core sampling impact drill disclosed in this patent application cannot complete long-distance core sampling, the core sampling length is limited, and multiple cycles are required to complete the core sampling operation task.

[0005] Therefore, there is an urgent need for a core sampling drill system for the concrete filling surface of the tunnel invert, which can increase the core sampling length, improve the core sampling efficiency and have a strong drilling force during the core sampling process. Summary of the Utility Model

[0006] Aiming at the above problems, one of the purposes of the utility model is to provide a core sampling drill system for the concrete filling surface of the tunnel invert, which can drill through the concrete on the invert filling surface at one time during the working process, has a faster feeding speed, avoids multiple cycle operations, and improves the core sampling efficiency.

[0007] To achieve the above object, the present utility model provides the following technical solutions: The present utility model provides a core drilling tool system for the concrete filling surface of the tunnel invert, including a core drilling bit device, a core pipe section device, and a multi-functional crawler drill. Among them,

[0008] The core drilling bit device includes a drill head portion and a pipe section connection portion connected to the drill head portion;

[0009] The core pipe section device includes a drill bit connection portion at the front end, a core pipe section portion in the middle, and a drill rig connection portion at the tail end. The drill bit connection portion and the pipe section connection portion are respectively provided with matching male and female screw threads for mutual connection, and the drill rig connection portion is connected to the multi-functional crawler drill.

[0010] Among them, since all core drilling tools in the prior art are geological drills, during the core drilling process, their rotation system limits the connection length (here, the connection length refers to the connection length between the rotation system and the core drilling bit), so the single-core drilling length is limited. The multi-functional crawler drill used in the present utility model is usually used for drilling. Once again, it is used as a power device. Since its connection length can reach 4m and it can be connected to a core drill with a connection length of 2m to 3.5m, it can thus complete the core drilling of the tunnel invert concrete filling surface of 2m to 2.5m at one time.

[0011] In some embodiments, the drill head portion includes a drill head base and a plurality of tooth engaging members evenly distributed on the drill head base. The space between each tooth engaging member forms a slag discharge channel. The top or bottom of each tooth engaging member is recessed with a top fitting groove or a bottom fitting groove. The top fitting grooves and the bottom fitting grooves are arranged alternately, and diamond composite sheets are respectively welded in the top fitting grooves and the bottom fitting grooves.

[0012] In some embodiments, 12 tooth engaging members are evenly distributed on the drill head base.

[0013] In some embodiments, the drill head base and each tooth engaging member are integrally formed, and the drill head base and each tooth engaging member are made of carbon structural steel.

[0014] In some embodiments, the diamond composite sheet is cylindrical, the thickness of the cylinder is 15 - 16mm, and the diameter of the cylinder is 15 - 16mm.

[0015] In some embodiments, the lengths of the top fitting groove and the bottom fitting groove are set to 15 - 16mm, and the width of the fitting groove is set to 7 - 8mm.

[0016] In some embodiments, the length of the drill head base is set to 35 - 40mm, and the length of the tooth engaging member is set to 30 - 35mm.

[0017] In some embodiments, the diameter of the drill head is set to 150 mm, and the length of the core bit device is set to 180 - 200 mm.

[0018] In some embodiments, the core pipe section device is made of carbon structural steel pipe, the outer diameter of the carbon structural steel pipe is set to 146 mm, and the wall thickness is set to 18 mm.

[0019] In some embodiments, the length of the core pipe section device is set to 2100 - 2200 mm, wherein the length of the drill rig connection part is set to 100 - 200 mm.

[0020] Due to the adoption of the above technical solutions, the present utility model has at least obtained the following technical effects: (1) The present utility model can replace the traditional core-taking method. The multi-functional crawler drill rig can connect the core pipe section device with a length of 2 - 3.5 m at one time, and cooperate with the multi-functional crawler drill rig to drill through the invert filling surface concrete at one time. The feeding speed is relatively fast, avoiding multiple cyclic operations and having high core-taking efficiency; (2) The diamond composite sheets arranged on the drill head have the advantages of high hardness, good wear resistance, strong impact resistance, and high thermal stability; (3) The layout of the diamond composite sheets is serrated, with a large biting force on the formation during operation, a fast tooth entering speed, and not being prone to jamming when encountering iron obstacles such as steel bars and small conduits, which can ensure the stable operation of the drill head; (4) The diamond composite sheets are set in a cylindrical shape. The cylindrical diamonds are evenly stressed during operation and are not prone to wear, effectively prolonging the working time of the drill head; (5) The slag discharge channels formed between adjacent tooth clamping parts at the drill head can smoothly discharge slag during the core-taking process of the drill bit; (6) The core pipe section device is made of high-quality 45# carbon structural steel, with a small drill tool wear rate and long durability. Under the action of the multi-functional crawler drill rig, the feeding force can be increased, improving the construction efficiency; (7) The original geological drill has a fixed rotation system, while the multi-functional crawler drill rig of the present utility model has a mobile rotation system, effectively extending the connection length between the rotation system and the core bit, achieving the effect of long-distance core-taking; (8) After long-term work, only the core bit device needs to be replaced, without replacing other components, with low construction cost and high construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Shows a schematic structural diagram of the core bit device provided by the present utility model;

[0022] Figure 2 Shows a schematic structural diagram of the drill head provided by the present utility model;

[0023] Figure 3 Shows a schematic structural diagram of the fitting state of the tooth clamping part and the diamond composite sheet provided by the present utility model;

[0024] Figure 4 shows a schematic structural view of the pipe section connection part provided by the present utility model;

[0025] Figure 5 shows a schematic view of the construction state provided by the present utility model;

[0026] Explanation of reference numerals:

[0027] 1 - core drill bit device, 11 - drill head part, 111 - drill bit base, 112 - clamping tooth part, 113 - slag discharge channel, 114 - polycrystalline diamond compact, 12 - pipe section connection part, 2 - core pipe section device, 3 - multi-functional crawler drill rig. Specific embodiments

[0028] To make the objectives, technical solutions and advantages of the present utility model clearer, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0029] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "front", "back", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the system or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model. In addition, the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the above-mentioned components. Without further statement, the above terms have no special meanings and should not be construed as indicating or implying relative importance.

[0030] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection" and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0031] As a non-restrictive embodiment, the core drill tool system of the present utility model for the tunnel invert concrete filling surface includes a core drill bit device 1, a core pipe section device 2 and a multi-functional crawler drill rig 3.

[0032] As Figure 1 shown, the core bit device 1 includes a drill head portion 11 and a pipe section connection portion 12. The drill head portion 11 includes a drill head base 111 and twelve tooth engaging members 112 evenly distributed on the drill head base 111. As Figure 2 shown, the gap between each tooth engaging member 112 forms a slag discharge channel 113. A top fitting groove (not shown in the figure) or a bottom fitting groove (not shown in the figure) is recessed at the top or bottom end of each tooth engaging member 112. The top fitting grooves and the bottom fitting grooves are arranged staggeredly, and diamond composite sheets 114 are welded in the top fitting grooves and the bottom fitting grooves respectively.

[0033] In this non-limiting embodiment, the drill head base 111 and each tooth engaging member 112 are integrally formed. The drill head base 111 and the tooth engaging members 112 are made of high-quality carbon structural steel No. 45. The diamond composite sheet 114 is cylindrical, the thickness of the cylinder is 15 mm, the diameter of the cylinder is 15 mm, the length of the top fitting groove and the bottom fitting groove is set to 15 mm, and the width of the fitting groove is set to 7.5 mm. Thus, the round head of the diamond composite sheet 114 can be inserted into the top fitting groove or the bottom fitting groove and then welded.

[0034] As Figure 4 shown, the core pipe section device 2 includes a drill bit connection portion 21, a core pipe section portion 22, and a drill rig connection portion 23. As Figure 1 and Figure 2 shown, the pipe section connection portion 12 is provided with a female thread S1, and the drill bit connection portion 21 is provided with a male thread S2. The male thread on the drill bit connection portion 21 matches the female thread on the pipe section connection portion 12, so as to realize the connection between the core bit device 1 and the core pipe section device 2. The drill rig connection portion 23 is also provided with a thread, so as to realize the connection with the multi-functional crawler drill rig 3.

[0035] In order to meet the force requirements, the core pipe section device 2 is made of high-quality carbon structural steel No. 45. The outer diameter of the carbon structural steel pipe is set to 146 mm, and the wall thickness is set to 18 mm.

[0036] In this non-limiting embodiment, the length of the drill head base is set to 35 mm, the length of the tooth engaging member is set to 30 mm, the diameter of the drill head portion is set to 150 mm, the length of the pipe section connection portion 12 is set to 180 - 200 mm, the length of the core pipe section device is set to 2120 mm, and the length of the drill rig connection portion is set to 120 mm.

[0037] Thus, as Figure 5 shown, the multi-functional crawler drill rig 3 can connect the core pipe section device 2 with a length of 2 - 3.5 m at one time, and cooperate with the new type of core bit device 1 to drill through the invert filling surface concrete at one time, with a faster feeding speed, avoiding multiple cycle operations and having a high core taking efficiency.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A core drilling tool system for the concrete filling surface of the invert in a tunnel, characterized in that, It includes a core bit device, a core pipe section device and a multi-functional crawler drill. Among them, the core bit device includes a drill head part and a pipe section connection part connected to the drill head part; the core pipe section device includes a drill bit connection part at the front end, a core pipe section part in the middle and a drill connection part at the tail end. Matching male and female screw threads are respectively provided on the drill bit connection part and the pipe section connection part for mutual connection, and the drill connection part is connected to the multi-functional crawler drill.

2. The core drill system for the concrete filling surface of the tunnel invert according to claim 1, characterized in that, The drill head part includes a drill bit base and a number of tooth engaging parts evenly distributed on the drill bit base. The gap between each tooth engaging part forms a slag discharge channel. A top fitting groove or a bottom fitting groove is recessed at the top or bottom of each tooth engaging part. The top fitting grooves and the bottom fitting grooves are arranged alternately, and diamond composite sheets are welded in the top fitting grooves and the bottom fitting grooves respectively.

3. The core drill system for the concrete filling surface of the tunnel invert according to claim 2, characterized in that 12 tooth engaging parts are evenly distributed on the drill bit base.

4. The core drill system for the concrete filling surface of the tunnel invert according to claim 2, wherein The drill bit base and each tooth engaging part are integrally formed, and the drill bit base and each tooth engaging part are made of carbon structural steel.

5. The core drill system for the concrete filling surface of the tunnel invert according to claim 2, characterized in that, The diamond composite sheet is cylindrical. The thickness of the cylinder is 15 - 16 mm, and the diameter of the cylinder is 15 - 16 mm.

6. The core drill system for the concrete filling surface of the tunnel invert according to claim 5, characterized in that, The lengths of the top fitting groove and the bottom fitting groove are set to 15 - 16 mm, and the width of the fitting groove is set to 7 - 8 mm.

7. The core drill system for the concrete filling surface of the tunnel invert according to claim 6, characterized in that The length of the drill bit base is set to 35 - 40 mm, and the length of the tooth engaging part is set to 30 - 35 mm.

8. The core drill system for the concrete filling surface of the tunnel invert according to claim 6, characterized in that, The diameter of the drill head part is set to 150 mm, and the length of the core bit device is set to 180 - 200 mm.

9. The core drill system for the concrete filling surface of the tunnel invert according to claim 2, characterized in that, The core pipe section device is made of carbon structural steel pipe. The outer diameter of the carbon structural steel pipe is set to 146 mm, and the wall thickness is set to 18 mm.

10. The core drill system for the concrete filling surface of the tunnel invert according to claim 9, characterized in that, The length of the core pipe section device is set to 2100 - 2200 mm, and the length of the drill connection part is set to 100 - 200 mm.

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