Drill bit with buffer cavity

Abstract

The utility model provides a drill bit with a buffer cavity, which relates to the technical field of engineering drilling tools, and comprises a drilling machine bin, a drilling machine cover, a shock absorption bin and a bin opening control mechanism, the shock absorption bin is arranged in the drilling machine bin, a bin separating structure and shock absorption steel balls are arranged in the shock absorption bin, a shock insulation layer is arranged outside the drilling machine bin, the top of the drilling machine bin is movably connected with the drilling machine cover, and the drilling machine cover is movably connected with the drilling machine bin. A bin opening control mechanism is fixedly connected into the drilling machine bin, the multiple damping bins are arranged in the drill bit, the damping bins are filled with damping steel balls, impact force and vibration energy generated in the drilling process are effectively absorbed and dispersed, disturbance to sensitive structures such as tunnel rails and buildings is remarkably reduced, and construction safety is improved; the damping bins are annularly arranged at intervals and matched with the follow-up plates, the partition plates and the cover plates to form a closed space structure, the overall stability and rigidity of the drill bit are enhanced, the problems of drill hole deflection and hole wall instability caused by vibration are solved, and therefore the drilling precision is improved, and the follow-up construction quality is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of engineering drilling tools, in particular to a drill bit with a buffer cavity. Background Art

[0002] Existing drilling equipment often generates significant vibrations during construction operations near buildings along tunnels or drilling sites, posing a potential threat to the tunnel's structural stability and the safety of surrounding buildings. Especially when drilling near tunnels or underground structures, significant vibrations can cause cracking, deformation, or even collapse, compromising train safety. Furthermore, nearby buildings, particularly older or vibration-sensitive structures, can also experience wall cracking and foundation settlement due to drilling vibrations, leading to safety risks and financial disputes.

[0003] Furthermore, existing drilling equipment suffers from numerous operational drawbacks when subjected to high-frequency vibration. For example, strong vibration accelerates wear of drill bits, shortening their service life and increasing maintenance costs and replacement frequency. Furthermore, vibration can affect drilling accuracy, leading to hole deviation or unstable borehole walls, thus compromising subsequent construction quality. In urban environments, excessive noise and vibration can also trigger complaints from surrounding residents, impacting construction progress and public image.

[0004] The Chinese utility model patent document with publication number CN213928265U proposes a drilling drill bit for municipal public works. Drilling is performed through a drill nail assembly outside the drilling drill bit, mud is discharged during drilling through a mud guide assembly, and connection is made through a limit connection assembly and a limit assembly, making it easier to connect and drill. Although this type of drill bit improves operating efficiency, it is easy to cause irreversible destructive effects on surrounding sensitive structures when drilling in locations with sensitive structures nearby.

[0005] Therefore, it is urgent to develop a drill bit with a buffer cavity to solve the above technical problems. Utility Model Content

[0006] The utility model is a drill bit with a buffer cavity. By arranging shock-absorbing chambers at equal intervals inside the drill bit, the construction requirements in complex environments are met, the safety of tunnel operation and sensitive structures such as buildings is ensured, and the construction efficiency and project quality are improved.

[0007] To achieve the above objectives, the utility model is implemented through the following technical solutions: a drill bit with a buffer chamber, including a drill rig chamber, a drill rig cover, a shock-absorbing chamber and a chamber opening control mechanism, an isolation layer is provided outside the drill rig chamber, a shock-absorbing chamber is provided inside the drill rig chamber, a sub-chamber structure and shock-absorbing steel balls are provided inside the shock-absorbing chamber, a drill rig cover is movably connected to the top of the drill rig chamber, and an opening control mechanism is fixedly connected inside the drill rig chamber.

[0008] Preferably, the drill rig chamber is a cylindrical structure, and the drill rig chamber includes: a drill bit shell, a shock-isolating layer, a polyurethane protective shell and a boss protective outer ring. A polyurethane protective shell is provided on the outside of the drill bit shell, and a shock-isolating layer is filled between the drill rig chamber and the polyurethane protective shell. The shock-isolating layer is provided with a 3-6mm black rubber particle layer, and an annular boss protective outer ring is provided on the top of the drill bit shell.

[0009] Preferably, the shock-absorbing chamber is an arc-shaped structure, and the shock-absorbing chamber is arranged in a circular pattern in the drilling rig chamber. The shock-absorbing chamber includes a conforming plate, a partition plate and a cover plate. The conforming plate is fixedly connected to the drill bit shell after being fitted. Partitions are provided at equal intervals on the other side of the conforming plate, and a cover plate is fixedly connected to the outside of the partition. The conforming plate, partition plate and cover plate form a closed space.

[0010] Preferably, the partitions separate the shock-absorbing compartments to form shock-absorbing sub-compartments, the distance between the partitions in the shock-absorbing compartments is greater than 100 mm, the shock-absorbing sub-compartments are provided with shock-absorbing steel balls with half their volume, and the height of the shock-absorbing compartments corresponds to the internal height of the drilling rig compartment.

[0011] Preferably, the diameter of the shock-absorbing steel ball is 8 mm.

[0012] Preferably, the drill rig cover includes a drill bit mounting seat, an alloy drill bit and a high-strength rubber shock-absorbing gasket. A drill bit mounting seat is provided on the top of the drill rig cover, an alloy drill bit is fixedly connected to the top of the drill bit mounting seat, a high-strength rubber shock-absorbing gasket is provided between the alloy drill bit and the drill bit mounting seat, and after the alloy drill bit is installed, there is a certain inclination angle between the alloy drill bits.

[0013] Preferably, a feed hole is provided on one side of the drilling rig cover, and the feed hole and the opening control mechanism are located on the same side.

[0014] Beneficial effects: The utility model provides a drill bit with a buffer chamber, which has the following beneficial effects compared with the existing technology:

[0015] This solution forms a multi-point buffer structure by setting up multiple shock-absorbing chambers inside the drill bit and filling them with shock-absorbing steel balls. This effectively absorbs and disperses the impact force and vibration energy generated during the drilling process, significantly reduces the disturbance to sensitive structures such as tunnel tracks and buildings, and improves construction safety. The shock-absorbing chambers are arranged in a ring-shaped interval, and the closed space structure formed by the profile plate, partition and cover plate enhances the overall stability and rigidity of the drill bit, reduces the problems of drilling deviation and hole wall instability caused by vibration, thereby improving drilling accuracy and ensuring the quality of subsequent construction.

[0016] The shock-isolating layer of the utility model is filled with 3-6mm black rubber particles, combined with a polyurethane protective shell and a boss protective outer ring to form a multi-protection structure, which effectively reduces the wear and impact damage of the drill bit shell, extends the service life of the drill bit, and reduces the replacement frequency and maintenance costs.

[0017] The drill bit structure of this utility model is reasonably designed and is suitable for complex environments with high vibration control requirements, such as urban rail transit, along high-speed tunnels, and in areas with dense buildings. Through multiple optimizations of shock-absorbing structures and materials, the noise generated during the drilling process is effectively reduced, the interference to surrounding residents and the environment is reduced, and the social acceptance and environmental protection level of the construction project are improved. Through the coordinated design of the opening control mechanism and the feed hole, the transportation and operation control of materials during the construction process are facilitated, thereby improving the overall construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0019] Figure 1 This is a schematic diagram of the structure of the utility model;

[0020] Figure 2 This is a top view of the drilling rig cover in the closed state of the utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the shock-absorbing bin of the utility model;

[0022] Figure 4 This is a structural diagram of the drilling rig cabin of the utility model;

[0023] In the picture:

[0024] 1. Drilling rig compartment, 101. Drill bit housing, 102. Vibration isolation layer, 103. Polyurethane protective housing, 104. Boss protective outer ring,

[0025] 2. Drilling machine cover, 201. Drill bit mounting seat, 202. High-strength rubber shock-absorbing washer, 203. Alloy drill bit, 204. Feed hole,

[0026] 3. Shock-absorbing bin, 301. Conformal plate, 302. Partition, 303. Cover, 304. Shock-absorbing steel balls, 305. Shock-absorbing compartment,

[0027] 4. Opening position control mechanism. DETAILED DESCRIPTION

[0028] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail in conjunction with the embodiments and drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. The technical solutions of the present invention are described in detail below in conjunction with the embodiments and drawings, but the scope of protection is not limited thereto.

[0029] See also Figure 1-4 , the utility model provides a technical solution:

[0030] A drill bit with a buffer chamber includes a drill rig chamber 1, a drill rig cover 2 and a chamber opening control mechanism 4. A shock-absorbing chamber 3 is provided in the drill rig chamber 1, and a sub-chamber structure and shock-absorbing steel balls 304 are provided in the shock-absorbing chamber 3 to reduce vibration of the drill bit. The drill rig cover 2 is movably connected to the top of the drill rig chamber 1, and the chamber opening control mechanism 4 is fixedly connected to the drill rig chamber 1 for controlling the removal of materials during the drilling process.

[0031] In some embodiments, the drill rig chamber 1 is a cylindrical structure, and the drill rig chamber 1 includes: a drill bit shell 101, a shock-isolating layer 102, a polyurethane protective shell 103 and a boss protective outer ring 104. A polyurethane protective shell 103 is provided on the outside of the drill bit shell 101, and a shock-isolating layer 102 is filled between the drill rig chamber 1 and the polyurethane protective shell 103. The shock-isolating layer 102 is a 3-6mm black rubber particle layer. The fine rubber layer further reduces the vibration of the drill bit during operation. An annular boss protective outer ring 104 is provided on the top of the drill bit shell 101 to enhance structural strength and prevent edge wear.

[0032] In some embodiments, the shock-absorbing chamber 3 is an arc-shaped structure, and the shock-absorbing chamber 3 is arranged in a circular pattern in the drilling rig chamber 1. The sub-compartment structure of the shock-absorbing chamber 3 includes a conforming plate 301, a partition 302 and a cover plate 303. The conforming plate 301 is fixedly connected to the drill bit housing 101 after being fitted, thereby relying on the shock-absorbing chamber 3 to reduce the vibration of the equipment. Partitions 302 are provided at equal intervals on the other side of the conforming plate 301, and a cover plate 303 is fixedly connected to the outside of the partition 302. The conforming plate 301, the partition 302 and the cover plate 303 form a closed space for holding shock-absorbing beads.

[0033] In some embodiments, the partition plate 302 separates the damping bin 3 into damping sub-bins 305, the distance between the partition plates 302 in the damping bin 3 is greater than 100 mm, and the damping sub-bins 305 are provided with damping steel balls 304 with a volume of half of the damping bin 3, so that the damping balls vibrate fully and play a damping role, and the diameter of the damping steel balls 304 is 8 mm, which has good rolling property and shock absorption capacity, the height of the damping bin 3 corresponds to the internal height of the drilling machine bin 1, and the damping effect covers the entire drill bit working area.

[0034] In some embodiments, the drilling machine cover 2 is provided with a drill bit mounting seat 201 at the top, and the alloy drill bit 203 is fixedly connected to the top of the drill bit mounting seat 201, and a high-strength rubber damping washer 202 is arranged between the alloy drill bit 203 and the drill bit mounting seat 201, which is used to further absorb the impact force in the drilling process, and the alloy drill bit 203 has a certain inclination angle after installation, which helps to improve the drilling efficiency.

[0035] In some embodiments, the drilling machine cover 2 is provided with a feed hole 204 on one side, and the feed hole 204 and the bin opening control mechanism 4 are located on the same side, which is convenient for the introduction and discharge of mud or cutting materials during drilling.

[0036] In some embodiments, the cover plate 303 is a honeycomb-shaped perforated stainless steel plate, which promotes the damping movement of the steel balls.

[0037] In some embodiments, the damping bin 3 is provided with a double-layer structure together with the profile plate 301 and the cover plate 303, the inner layer is coated with a rubber coating of 3 mm nitrile rubber particles, and the outer layer is made of stainless steel.

[0038] In some embodiments, the damping bin 3 is arranged axially in the drilling machine bin 1, and there are five damping bins 3, and the damping bin 3 is arranged between the bin opening control mechanism 4.

[0039] The working principle of the utility model is: in the drilling operation process, the vibration generated by the rotation of the drill bit is absorbed and dispersed by the damping steel balls 304 in the damping bin 3 and the shock isolation layer 102, which significantly reduces the vibration energy transmitted to the drill bit shell 101 and the external structure. At the same time, the bin opening control mechanism 4 can control the entry and exit of materials according to the construction needs, ensuring the continuity and stability of the drilling process.

[0040] The above is a further detailed description of the utility model made in combination with the preferred embodiments, and for ordinary skilled persons in the technical field to which the utility model belongs, without departing from the utility model, a number of simple deductions or substitutions can be made, which should be regarded as belonging to the utility model, and the patent protection range is determined by the submitted claims.

Claims

1. A drill bit with a buffer chamber, comprising a drill chamber, a drill cover, a shock-absorbing chamber and a chamber opening control mechanism, characterized in that: An isolation layer is provided outside the drilling rig compartment, a shock-absorbing compartment is provided inside the drilling rig compartment, a sub-compartment structure and shock-absorbing steel balls are provided inside the shock-absorbing compartment, a drilling rig cover is movably connected to the top of the drilling rig compartment, and an opening control mechanism is fixedly connected inside the drilling rig compartment.

2. The drill bit with a buffer chamber according to claim 1, characterized in that: The drilling rig chamber is a cylindrical structure, and includes: a drill bit shell, a shock-isolating layer, a polyurethane protective shell and a boss protective outer ring. A polyurethane protective shell is provided on the outside of the drill bit shell, and a shock-isolating layer is filled between the drilling rig chamber and the polyurethane protective shell. The shock-isolating layer is provided with a 3-6mm black rubber particle layer, and an annular boss protective outer ring is provided on the top of the drill bit shell.

3. The drill bit with a buffer chamber according to claim 2, characterized in that: The shock-absorbing chamber has an arc-shaped structure and is arranged in a circular pattern in the drilling rig chamber. The shock-absorbing chamber includes a conforming plate, a partition plate and a cover plate. The conforming plate is fixedly connected to the drill bit housing after being fitted. Partition plates are provided at equal intervals on the other side of the conforming plate. A cover plate is fixedly connected to the outside of the partition plate. The conforming plate, partition plate and cover plate form a closed space.

4. The drill bit with a buffer chamber according to claim 3, characterized in that: The partitions separate the shock-absorbing compartments to form shock-absorbing sub-compartments. The distance between the partitions in the shock-absorbing compartments is greater than 100 mm. The shock-absorbing sub-compartments are provided with shock-absorbing steel balls with half the volume of the shock-absorbing steel balls. The height of the shock-absorbing compartments corresponds to the internal height of the drilling rig compartment.

5. The drill bit with a buffer chamber according to claim 4, characterized in that: The diameter of the shock-absorbing steel ball is 8 mm.

6. The drill bit with a buffer chamber according to claim 1, characterized in that: The drill rig cover includes a drill bit mounting seat, an alloy drill bit and a high-strength rubber shock-absorbing gasket. A drill bit mounting seat is provided on the top of the drill rig cover. An alloy drill bit is fixedly connected to the top of the drill bit mounting seat. A high-strength rubber shock-absorbing gasket is provided between the alloy drill bit and the drill bit mounting seat. After the alloy drill bit is installed, there is a certain inclination angle between the alloy drill bits.

7. The drill bit with a buffer chamber according to claim 6, characterized in that: A feed hole is provided on one side of the drilling rig cover, and the feed hole and the opening control mechanism are located on the same side.

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