Novel drill bit structure

Abstract

The utility model relates to the technical field of circular seam drill bits, in particular to a novel drill bit structure which comprises a drill bit installation flange, a drill tooth installation frame, a coring blade, a hobbing cutter, a scraping drill bit, a down-the-hole drill bit, a slag discharging hole, a slag guiding piece and a fixing base. The outmost coring blade firstly scrapes a rock stratum subjected to coring, the coring blades sequentially close to the axis sequentially scrape the rock stratum, resistance borne by the device in the working process is greatly reduced, a plurality of concentric annular faces different in size are formed on the scraping working face, after the coring ring is completed, the sharp corner of the hob is squeezed into the overhead annular rock, and the rock stratum is scraped. When the device works, the side end of the hobbing cutter is squeezed into the gap of the hollow annular surface, the adjacent hollow surface is scraped, the front end tooth part of the coring blade is sequentially cut into the rock surface, the resistance borne by the device during working is reduced, coring is greatly facilitated, and the load of driving equipment is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to annular slot drill bit technical field, concretely is a novel drill bit structure. BACKGROUND

[0002] The annular slot drill is one of important engineering instruments such as mining, tunnel engineering, the drill bit of annular slot drill is usually formed by coring cutter, scraping drill bit and the like component, these components work cooperatively to complete complex drilling task, but the coring cutter of existing drill bit is strip, is installed in straight line from drill bit axle to edge, when drill bit works, coring cutter is completely contacted with rock surface, makes the resistance that drill bit bears larger, driving equipment load is higher, and work efficiency is lower, after the damage of upper part cutter of coring cutter, needs to replace entire coring cutter, and there is certain deficiency. UTILITY MODEL CONTENT

[0003] The utility model discloses a novel drill bit structure to solve the technical problem proposed above.

[0004] To achieve the above object, the utility model provides the following technical scheme: a novel drill bit structure, including drill tooth mounting frame, one end of drill tooth mounting frame is fixedly connected with drill bit mounting flange, and drill tooth mounting frame is cylindrical mounting frame, the end of drill tooth mounting frame away from drill bit mounting flange is fixedly installed at least two groups of coring cutter piece, each group of coring cutter piece is formed by a plurality of coring cutter pieces of different lengths and different heights, and the height of each group of coring cutter piece gradually decreases from outside to inside.

[0005] Preferably, the coring cutter piece and the down-the-hole drill bit are coaxially arranged, the length of the coring cutter piece gradually increases from the axis to the outside, the tooth tip of the coring cutter piece is higher than the top of the rolling cutter, the rolling cutter is a sharp-angle rolling cutter, and the two are oppositely arranged at different angles.

[0006] Preferably, the end of the drill tooth mounting frame away from the drill bit mounting flange is provided with two coring cutter mounting plates, a plurality of coring cutter pieces are fixedly installed on the coring cutter mounting plates through bolts, a guide piece is arranged inside the drill tooth mounting frame, one end of the guide piece is located at the lower end of the coring cutter mounting plate, and the other end is located at the slag discharging hole of the drill tooth mounting frame.

[0007] Preferably, the drill bit mounting frame is provided with a cutter mounting plate away from the end of the drill bit mounting flange, the cutter mounting plate is provided with through grooves corresponding to the number of cutters, facilitating the rolling of the cutters after installation, a plurality of groups of fixing seats are fixedly installed on the cutter mounting plate, two fixing seats form a group, and the cutters are installed between the two fixing seats through a pin shaft, a cylinder for fixing the core cutter mounting plate and the cutter mounting plate is installed at the center of one side of the drill bit mounting flange end plate, the cylinder is coaxially arranged with the drill bit mounting shaft, one end of the core cutter mounting plate and the cutter mounting plate is fixedly connected with the drill bit mounting frame, and the other end is fixedly connected with the cylinder, the working surface of the down-the-hole drill is higher than the tooth top end of the core cutter, the tooth top end of the core cutter is located on the same horizontal plane as the working surface of the scraping drill, and the hollow part of the scraping drill rod forms an exhaust passage.

[0008] Compared with the prior art, the utility model has the advantages of:

[0009] The utility model discloses a clever structure, and the down-the-hole drill of the device drills a distance first, positions the whole drill, supports on the working surface, makes the whole drill keep stable when working, the core cutter is arranged in the shape of a crescent shovel, and the height of each group of core cutters gradually decreases from outside to inside, the outermost core cutter first scrapes the rock stratum to be cored, the number of core cutters scraping the rock stratum gradually increases along with the drilling of the drill, when hard rock stratum is encountered, the method that all core cutters do not contact the rock stratum can be used to break the rock stratum, compared with the mode that all core cutters contact the rock stratum, the load of the driving device during work can be effectively reduced according to the specific working condition, and the use is more flexible, the scraping working surface forms a plurality of coaxial annular faces of different sizes, when the core ring is completed, the sharp corner of the cutter extrudes the annular rock in the air, the side end of the cutter extrudes the gap in the annular face in the air, and the adjacent annular face in the air is scraped to be completed, the front end tooth of the core cutter cuts into the rock face in sequence, the resistance during work of the device is small, the core taking is greatly facilitated, the load of the driving equipment is reduced, and the undamaged core cutters do not need to be replaced when part of the core cutters are damaged, so that the maintenance cost of the device is reduced. ACCURACY OF DRAWINGS

[0010] Fig. 1 It is a three-dimensional structure schematic view of the utility model;

[0011] Fig. 2 It is a working surface front view of the utility model;

[0012] Fig. 3 It is a cutter working track schematic view of the utility model;

[0013] Fig. 4 It is a slag guide piece three-dimensional structure schematic view of the utility model.

[0014] In the figure: 1, drill bit mounting flange; 2, drill bit mounting rack; 3, core bit; 4, rolling cutter; 5, skimming drill bit; 6, down-the-hole drill bit; 7, slag discharge hole; 8, slag guide piece; 9, fixed seat; 10, skimming drill rod. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0016] Please refer to Figs. 1 to 4The utility model provides technical scheme: A novel drill bit structure, including drill tooth mounting frame 2, the one end fixed connection of drill tooth mounting frame 2 has drill bit mounting flange 1, drill tooth mounting frame 2 is cylindrical mounting frame, the one end fixed mounting two groups's of core cutter 3 of drill tooth mounting frame 2 away from drill bit mounting flange 1, every group core cutter 3 is by a plurality of length different and height different core cutter 3 constitutes, every group core cutter 3 is arranged in crescent shovel shape, the height of every group core cutter decreases gradually from outside to inside, the one end of drill tooth mounting frame 2 away from drill bit mounting flange 1 is installed two groups' s hobbing cutter 4, and the number of every group hobbing cutter 4 is two, the end plate of drill tooth mounting frame 2 installation drill bit mounting flange 1 is provided with the slag hole 7, the one side center of drill tooth mounting frame 2 installation drill bit mounting flange 1 end plate is installed with the shaving drill rod 10, and the shaving drill rod 10 is by drill rod and shaving drill bit 5 constitutes, and the one end of shaving drill rod 10 is provided with shaving drill bit 5, and shaving drill bit 5 and shaving drill rod 10 are integral type structure, and the one end of shaving drill rod 10 is fixedly installed with down-the-hole drill 6 by the way of screw thread connection, and down-the-hole drill 6 can be detached by shaving drill rod 10 and is replaced, and core cutter 3 and down-the-hole drill 6 are coaxial arrangement, and the length of core cutter 3 gradually increases from the axis to outside, is suitable for different size annular surface, and simultaneously the front end tooth part of core cutter 3 is cut into rock surface gradually, and the resistance is small, and the tooth top of core cutter 3 is higher than the top of hobbing cutter 4, and hobbing cutter 4 is sharp angle type hobbing cutter, and is relatively arranged into different included angle, and down-the-hole drill 6, shaving drill bit 5 can be detached, and can be replaced into different style drill bit, when the device works, down-the-hole drill 6 drills a distance first, and positions the whole drill bit, and supports on the working surface, and core cutter 3 is arranged in crescent shovel shape, when the device works and rotates, the outermost core cutter first scrapes the rock layer of being cored, and along with the drilling of drill bit, the number of core cutter scraping rock layer gradually increases, and the resistance of drill bit gradually increases, and the load of driving equipment also gradually increases, when meeting relatively hard rock layer, can adopt the method that core cutter does not all contact rock layer to break rock layer, because driving equipment is full load, can make part core cutter contact rock layer, compared with the mode that core cutter all contacts rock layer, the device can break hard rock layer, and it can effectively reduce the load of driving device when working according to specific working condition, is more flexible in use, and the scraping working surface forms multiple different size coaxial annular surfaces, when the core ring is completed, the sharp angle of hobbing cutter 4 is extruded into the annular rock in the air, and the side end of hobbing cutter 4 is extruded into the crack in the annular surface in the air, and scrapes the adjacent annular surface in the air, and the front end tooth part of core cutter 3 is cut into rock surface gradually, and the resistance is small, greatly facilitates the core to carry out.

[0017] Further, the drill bit mounting frame 2 is provided with two core cutters mounting plates at the end away from the drill bit mounting flange 1, a plurality of core cutters 3 are fixedly mounted on the core cutters mounting plates through bolts, a slag guide plate 8 is arranged in the drill bit mounting frame 2, one end of the slag guide plate 8 is located at the lower end of the core cutters mounting plate, and the other end is located at the slag discharging hole 7 of the drill bit mounting frame 2, and the rock slag scraped by the roller cutter 4 is scraped to the slag discharging hole 7 through the slag guide plate 8.

[0018] Further, the drill bit mounting frame 2 is provided with a roller cutter mounting plate at the end away from the drill bit mounting flange 1, a plurality of through grooves are formed in the roller cutter mounting plate, the number of the through grooves is same as that of the roller cutters 4, the roller cutters 4 are facilitated to roll after installation, a plurality of groups of fixing seats 9 are fixedly mounted on the roller cutter mounting plate, two fixing seats 9 form a group, the roller cutter 4 is mounted through a pin shaft between the two fixing seats 9, the fixing seat 9 can be dismounted and replaced when the roller cutter 9 is damaged, a cylinder for fixing the core cutters mounting plate and the roller cutter mounting plate is mounted at the center of one side of the end plate of the drill bit mounting flange 1, the cylinder is coaxially arranged with the drill bit mounting shaft, one end of the core cutters mounting plate and the roller cutter mounting plate is fixedly connected with the drill bit mounting frame 2, and the other end is fixedly connected with the cylinder, the working surface of the down-the-hole drill bit 6 is higher than the tooth top end of the core cutters 3, the tooth top end of the core cutters 3 is located at the same horizontal plane as the working surface of the scraping drill bit 5, and the hollow part of the scraping drill rod 10 forms an exhaust passage, so that the device for extracting gas is facilitated to extract hazardous gas.

[0019] The basic principle, main features and advantages of the utility model are shown and described above. The protection scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. A novel drill bit structure comprising a drill bit mounting flange fixedly connected to one end of a drill bit mounting frame, characterized in that: The drill bit mounting frame is fixedly installed with at least two groups of core cutters at one end away from the drill bit mounting flange, each group of core cutters is composed of core cutters with different lengths and heights, each group of core cutters is arranged in a crescent shape, and the heights of the core cutters in each group gradually decrease from outside to inside.

2. The novel bit structure according to claim 1, characterized in that: The core cutters are coaxially arranged with the down-the-hole drill bit, the lengths of the core cutters gradually increase from the axis to the outside, and the tooth top of the core cutters is higher than the top of the roller cutter.

3. The novel bit structure according to claim 1, wherein: The drill bit mounting frame is provided with two core cutter mounting plates at one end away from the drill bit mounting flange, a plurality of core cutters are fixedly installed on the core cutter mounting plates through bolts, and a guide slag piece is arranged in the drill bit mounting frame.

4. The novel bit structure according to claim 1, characterized in that: The drill bit mounting frame is provided with a roller cutter mounting plate at one end away from the drill bit mounting flange, a plurality of through grooves are formed in the roller cutter mounting plate and correspond to the number of roller cutters, the roller cutters are conveniently rolled after being installed, a plurality of fixing seats are fixedly installed on the roller cutter mounting plate, two fixing seats form a group, and the roller cutters are installed through pin shafts between the two fixing seats.

5. The novel bit structure according to claim 1, wherein: The working surface of the down-the-hole drill bit is higher than the tooth top of the core cutters, and the hollow part of the scraping drill rod forms an exhaust passage.

Images