Micro-disturbance tunneling drill bit
By designing a retractable scissor arm structure and a hydraulically assisted cutting micro-disturbance tunneling drill bit, the problems of large size of existing construction equipment and instability in soft strata were solved, realizing micro-disturbance cutting and stable implantation of soil.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI GUANGLIAN ENVIRONMENTAL & GEOTECHNICAL ENG CO LTD
- Filing Date
- 2025-05-28
- Publication Date
- 2026-04-10
AI Technical Summary
Existing underground construction technology and equipment are large-scale, and the construction process has a significant impact on the surrounding environment. Furthermore, it is prone to instability and collapse in soft strata or damage to surrounding structures, making it difficult to meet the requirements for micro-disturbance implantation construction.
A micro-disturbance tunneling drill bit was designed, which adopts a retractable scissor arm structure and combines hydraulic-assisted cutting. Soil cutting is achieved by opening and closing the scissor arm and swinging the cutting teeth. It is equipped with pressure and displacement sensors for monitoring, enabling micro-disturbance construction of the soil.
It enables micro-disturbance cutting of soil in soft strata, reducing the impact of construction on the surrounding environment and improving the stability and accuracy of construction.
Smart Images
Figure CN224107212U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to underground construction technical field, in particular to a kind of micro-disturbance tunneling drill bit technique. BACKGROUND
[0002] At present, the underground structure construction, pile foundation, deep foundation pit support and other underground structure construction are mostly using drilling pile, diaphragm wall, static pressure precast pile, driven precast pile, caisson, vertical shield construction technology, the construction equipment is huge, and the construction process has greater impact on the surrounding environment, so the tunneling drill bit of each technology cannot meet the micro-disturbance implantation construction technology requirements.
[0003] For example, the grab head or milling drill bit used in diaphragm wall construction, the grab bucket or milling wheel used in caisson or vertical shield construction, and the rotary drill bit or drill bucket used in drilling pile, all have fixed size, the drill bit cannot be retracted or folded to pass through the component, and the above technology is easy to collapse when encountering soft stratum such as quicksand, which has impact on the surrounding environment; for example, static pressure pile and driven pile are difficult to construct in dense sand layer, and are easy to cause extrusion effect during driving or pressing construction, which can damage the surrounding pipelines and structures. SUMMARY
[0004] In view of the defects in the prior art, the technical problem to be solved by the utility model is to provide a micro-disturbance tunneling drill bit which can be used in soft stratum construction with small disturbance to soil.
[0005] In order to solve the above technical problems, the utility model provides a micro-disturbance tunneling drill bit, which comprises a drill bit seat, and a flange for connecting a drill rod is arranged on the drill bit seat, characterized in that: a pair of scissors arms and a slurry pipe are further arranged on the drill bit seat.
[0006] The scissors arms are composed of a pair of splitable power arms, the two power arms are symmetrically arranged left and right, the upper ends of the two power arms are pivotally connected, the slurry pipe is arranged between the two power arms, and slurry pipe avoiding grooves are formed in the two power arms, so that the slurry pipe can be held by the slurry pipe avoiding grooves on the two power arms when the two power arms are held.
[0007] The drill bit seat is provided with an oscillating oil cylinder for driving the two power arms to split or hold, the lower ends of the two power arms are both provided with a tunneling cutter seat, and a soil cutting assembly for cutting soil is arranged on the tunneling cutter seat.
[0008] Further, the soil cutting assembly comprises fixed digging teeth fixed on the tunneling cutter seat, and movable digging teeth mounted on the tunneling cutter seat and capable of swinging left and right, and a digging tooth oil cylinder for driving the movable digging teeth to swing left and right is arranged on the tunneling cutter seat.
[0009] Further, the soil cutting assembly comprises a milling wheel mounted on the tunneling cutter seat and a milling motor for driving the milling wheel to rotate.
[0010] Further, the soil cutting assembly comprises a chain cutter mounted on the tunneling cutter seat and a chain cutter motor for driving the chain cutter to work.
[0011] Further, the soil cutting assembly comprises a cutter head mounted on the tunneling cutter seat and a cutter head motor for driving the cutter head to work.
[0012] Further, the power arms of the scissors arm are provided with pressure sensors and displacement sensors.
[0013] The micro-disturbance tunneling drill bit has the advantages that the hollow part of the underground structure wall is implanted into the component, the component is implanted into the soil body, the soil body is slightly disturbed, and the implanting operation is simultaneously implemented. BRIEF DESCRIPTION OF DRAWINGS
[0014] Fig. 1 is the front view of the micro-disturbance tunneling drill bit when the two power arms of the scissors arm are in the embracing state;
[0015] Fig. 2 is the front view of the micro-disturbance tunneling drill bit when the two power arms of the scissors arm are in the separated state;
[0016] Fig. 3 is the side view of the micro-disturbance tunneling drill bit. DETAILED DESCRIPTION
[0017] The embodiments of the present application are further described in detail below with reference to the accompanying drawings, but the embodiments are not used to limit the present application, and any similar structure and similar changes thereof should be included in the protection scope of the present application, and the dots in the present application represent the relationship of and.
[0018] As shown in Figs. 1-3 the micro-disturbance tunneling drill bit provided by the embodiments of the present application, comprising a drill bit seat 1 and a scissors arm mounted on the drill bit seat 1, the drill bit seat 1 is provided with a slurry pipe 8 and a flange for connecting a drill rod;
[0019] The scissors arm is composed of a pair of splitable power arms 4, the two power arms 4 are symmetrically arranged left and right, the upper ends of the two power arms 4 are pivotally connected, the slurry pipe 8 is arranged between the two power arms 4, and the slurry pipe avoiding grooves are formed in the two power arms 4, so that the slurry pipe 8 can be embraced by the slurry pipe avoiding grooves on the two power arms 4 after the two power arms 4 are embraced.
[0020] The drill bit seat 1 is provided with an oscillating oil cylinder 3 for driving the two power arms 4 to open and close, the lower ends of the two power arms 4 are both provided with a tunneling cutter seat 2, and the tunneling cutter seat 2 is provided with a soil cutting assembly for cutting soil;
[0021] The soil cutting assembly comprises fixed digging teeth 6 fixed on the tunneling cutter seat 2 and movable digging teeth 5 installed on the tunneling cutter seat 2 and capable of swinging left and right, and the tunneling cutter seat 2 is provided with a digging tooth oil cylinder 7 for driving the movable digging teeth 5 to swing left and right.
[0022] In the embodiment of the utility model, the power arm of the scissors arm is provided with a pressure sensor and a displacement sensor.
[0023] In other embodiments of the utility model, the digging teeth on the tunneling cutter seat and the digging tooth oil cylinder can also be replaced by milling wheels and a milling motor for driving the milling wheels to rotate, or replaced by chain cutting teeth and a chain cutting motor for driving the chain cutting teeth to work, or replaced by a cutter head and a cutter head motor for driving the cutter head to work.
[0024] The micro-disturbance tunneling drill bit provided by the utility model is suitable for implantation construction of an underground structure wall, and the working method is as follows:
[0025] First, the lower end of the drill rod is connected to the flange of the drill bit seat 1, the slurry pipe 8 is connected to the ground hydraulic equipment by a pipe fitting, the tunneling drill bit is extended downward to the bottom of the implantation member through the hollow part of the implantation member (hereinafter referred to as the implantation member), and implantation operation of the implantation member can be carried out.
[0026] When the implantation member carries out implantation operation, the oscillating oil cylinder 3 drives the two power arms 4 to reciprocatingly open and close, and drives the movable digging teeth 5 to swing left and right through the digging tooth oil cylinder 7, the stratum at the bottom of the implantation member is cut, and the stratum at the bottom of the implantation member can be hydraulically assisted cutting by using the slurry pipe 8 and the ground hydraulic equipment, the tunneling process can be monitored through the pressure sensor and the displacement sensor on the power arm, and stratum cutting drilling and member implantation are completed under the condition of micro-disturbance of the soil body.
[0027] After the implantation member is implanted to the predetermined depth, the tunneling drill bit can be retracted upward.
Claims
1. A micro-perturbation boring bit comprising a bit body having a flange for connecting a drill string, characterised in that: The drill bit seat is further provided with a scissors arm and a slurry pipe; The scissors arm is composed of a pair of splitable power arms, the two power arms are symmetrically arranged left and right, the upper ends of the two power arms are pivotally connected, the slurry pipe is arranged between the two power arms, and the slurry pipe avoiding grooves are arranged on the two power arms, so that the slurry pipe can be embraced by the slurry pipe avoiding grooves on the two power arms after the two power arms are embraced. The drill bit seat is provided with an oscillating oil cylinder for driving the two power arms to split and close, the lower ends of the two power arms are both provided with a tunneling tool seat, and the tunneling tool seat is provided with a soil cutting assembly for cutting soil.
2. The micro-perturbation tunneling drill bit of claim 1, wherein: The soil cutting assembly comprises fixed digging teeth fixed on the tunneling tool seat and movable digging teeth mounted on the tunneling tool seat and capable of swinging left and right, and the tunneling tool seat is provided with a digging tooth oil cylinder for driving the movable digging teeth to swing left and right.
3. The micro-perturbation tunneling drill bit of claim 1, wherein: The soil cutting assembly comprises a milling wheel mounted on the tunneling tool seat and a milling motor for driving the milling wheel to rotate.
4. The micro-perturbation tunneling drill bit of claim 1, wherein: The soil cutting assembly comprises chain cutting teeth mounted on the tunneling tool seat and a chain cutting motor for driving the chain cutting teeth to work.
5. The micro-perturbation tunneling drill bit of claim 1, wherein: The soil cutting assembly comprises a cutter head mounted on the tunneling tool seat and a cutter head motor for driving the cutter head to work.
6. The micro-perturbation tunneling drill bit of claim 1, wherein: The power arm of the scissors arm is provided with a pressure sensor and a displacement sensor.