CN201037379Y

CN201037379Y - Blocking-proof drill bit

Info

Publication number: CN201037379Y
Application number: CNU2007201230434U
Authority: CN
Inventors: 杨大安
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-06-15
Filing date: 2007-06-15
Publication date: 2008-03-19
Anticipated expiration: 2017-06-15

Abstract

The utility model discloses an anti-seizure bore bit, particularly a durable anti-seizure bore bit capable of preventing a bore bit from being seized inside a hole. The utility model comprises a bore bit blade (1), a bore bit front end (2), a bore bit middle end (3) and a bore bit back end and is characterized in that the bore bit back end has two to six thickened layers (4) which are symmetrically distributed; the inside of each thickened layer is provided with a circular hole (8); cylinders (5) are inserted into the circular holes; a small part of each cylinder extends out of the bore bit; in addition, the cylinders are connected with the main body of the bore bit. The utility model increases the thickness of the back end main body of the bore bit to increase the stability of anti-seizure alloy; meanwhile, the small part of alloy material extending backward and out of the bore bit can restore a blocked up drill hole so that the bore bit can be smoothly taken out.

Description

A kind of Seizing-proof rock-drill bit

Technical field: the utility model belongs to a kind of engineering construction instrument, a kind of bore bit of hammer drill specifically, and particularly a kind of bore bit that can prevent is stuck in the Seizing-proof rock-drill bit in the pricker hole.

Background technology: hammer drill is a kind of very important engineering construction drilling tool, and bore bit is the vitals of this rig, and bore bit is made up of bore bit main body and alloy blade, and the bore bit main body is adorned the alloy blade foremost.Phenomenon in the petrosal foramen usually appears being stuck in this bore bit in construction.Comparatively broken or soft rock stratum at some particularly are blocked in the gap of the joint portion of drill steel and bore bit especially easily, make bore bit be difficult to take out, and cause not molehill to construction.The inventor designs a kind of Seizing-proof rock-drill bit for this reason, and applied for utility model patent " a kind of Seizing-proof rock-drill bit " on February 15th, 06, authorized 07 year February 21, patent No. ZL200620008013.4, this patent is installed 2 alloy Seizing-proof rock-drill bit flanks in the bore bit rear end, flank is tabular, and blade is arranged backward, and flank is fixedlyed connected with the bore bit main body.When pulling out pricker, the blade of the example wing will be blocked in the landwaste fragmentation between bore bit and the drill steel, make boring reparation, bore bit can successfully be taken out, but because anti-calin flank is installed, to could connect at bore bit body rear fluting, thereby make the attenuation of bore bit body rear, under the huge twisting force of high-power rig, body rear is broken easily, for this reason, prior art must further be improved.

Summary of the invention: order of the present utility model is the problem of easily breaking at above-mentioned Seizing-proof rock-drill bit main body, research and design goes out a kind of can anti-sticking, again can robust novel Seizing-proof rock-drill bit.

The utility model is to improve to form on the basis of existing bore bit, and existing bore bit comprises bore bit blade, bore bit front end position, bore bit middle-end position and position, bore bit rear end, and the bore bit blade mainly rises and grinds the rock stratum, plays the driving effect; Fixedly alloy blade is mainly played at bore bit front end position, and the bore bit middle part is rounded, less than point diameter, mainly allows the landwaste that grinds discharge with water from it on every side, and bore bit rear end and drill steel joint portion are the easiest positions of being blocked by landwaste.Cutting edge shape is in-line or cross or ball profile of tooth or X-shaped respectively according to bore bit shape difference.At the easiest problem that easily causes the bore bit main body to break with the anti-sticking flank of being blocked by landwaste in bore bit rear end and drill steel joint portion, the utility model is provided with 2～6 thickening layers at 15～20mm place, bore bit rear end, thickening layer is symmetrically distributed, intersection at the thickest position of thickening layer and bore bit wall is opened circular hole, insert cylinder in the circular hole, cylindrical its shape of part rounded oval or square or triangle or knife-edge or pancake of stretching out bore bit, cylinder firmly is connected with the bore bit main body, the cylinder alloy that exposes bore bit can play the boring reparation of will stop up, the maximum gauge at bore bit front end position is greater than rear end thickening position diameter 2～6mm, cylinder is in thickening layer and what stretch out bore bit partly is an integral body, all be that alloy material with bore bit blade unanimity processes, the degree of depth of circular hole is lower than the degree of depth of thickening layer, thickening position collar extension is circular arc, also be square, between thickening layer, will leave the not position of thickening, so that the rock chip flows out.

The utility model has increased the thickness of bore bit back end main body, increases the stability of anti-calin, and bore bit alloy is partly stretched out in the rear end can take out drill bit the boring reparation of stopping up smoothly.

Description of drawings:

Fig. 1, bore bit structural representation

Fig. 2, bore bit in-line blade schematic diagram

Fig. 3, bore bit cross blade schematic diagram

Fig. 4, bore bit ball profile of tooth blade schematic diagram

Fig. 5, bore bit X-shaped blade schematic diagram

Fig. 6, bore bit rear end plan view

Among the figure: 1. bore bit blade, 2. bore bit front end, 3. bore bit middle part; 4. thickening layer mainly plays protection bore bit, guard circle cylinder and stationary cylinder, 5. cylinder; 6. cylinder stretches out the part of bore bit, 7. the unguyed part in bore bit rear end, 8. circular hole; 9. insert the hole of drill steel, be used for making bore bit to be connected, 10. intake-outlet with drill steel; be used for into water, levigate broken landwaste flushed out bore bit, 11. in-line blades; 12. the cross blade, 13. ball profile of tooth blades, 14.X shape blade.

The specific embodiment: the utility model is described further below in conjunction with accompanying drawing:

Embodiment: with reference to accompanying drawing, a kind of Seizing-proof rock-drill bit, comprise bore bit blade (1), bore bit front end (2), bore bit middle-end (3) and bore bit rear end, the bore bit cutting edge shape is in-line (11) or cross (12) or ball profile of tooth (13) or X-shaped (14) respectively according to bore bit shape difference, it is characterized in that thickening layer (4) being arranged at four angles, rear end of bore bit, thickening layer is symmetrically distributed, in thickening layer, open circular hole (8), insert cylinder (5) in the circular hole, cylinder stretches out bore bit sub-fraction (6), and cylinder is connected with the bore bit main body.The bore bit rear end thickening long 20mm in position, bore bit front end position (2) maximum gauge is greater than rear end thickening position diameter 2～6mm.The cylinder (5) that inserts in the circular hole (8) is the alloy material consistent with the bore bit blade with the material that it stretches out bore bit part (6).At four the diagonal angle symmetrical distributions in 20mm place, bore bit rear end thickening layer (4), maintain not thickening partly (7) between four jiaos of thickening layers.Cylinder stretches out part (6) the shape ovalize of bore bit, and the ball tooth is arranged on the face.The degree of depth of circular hole (8) is lower than the length of thickening layer (4).

The utility model increases the thickness of four jiaos of bore bit rear ends and has effectively fixed the anti-calin that inserts circular hole, makes its anti-sticking durable.

Claims

1. Seizing-proof rock-drill bit, comprise bore bit blade (1), bore bit front end (2), bore bit middle-end (3) and bore bit rear end, the bore bit cutting edge shape is in-line (11) or cross (12) or ball profile of tooth (13) or X-shaped (14) respectively according to bore bit shape difference, it is special to be that 2～6 thickening layers (4) are arranged in the rear end of bore bit, thickening layer is symmetrically distributed, and opens circular hole (8) in thickening layer, inserts cylinder (5) in the circular hole, cylinder stretches out bore bit (6), and cylinder is connected with the bore bit main body.

2. a kind of Seizing-proof rock-drill bit according to claim 1 is characterized in that the long 15～20mm in thickening position, bore bit rear end, and bore bit front end position (2) maximum gauge is greater than rear end thickening position diameter 2～6mm.

3. a kind of Seizing-proof rock-drill bit according to claim 1, the cylinder (5) that it is characterized in that inserting in the circular hole (8) is the alloy material consistent with the bore bit blade with the material that it stretches out bore bit part (6).

4. a kind of Seizing-proof rock-drill bit according to claim 1, four diagonal angles are symmetrically distributed in the bore bit rear end to it is characterized in that thickening layer, maintain not thickening partly (7) between four jiaos of thickening layers.

5. a kind of Seizing-proof rock-drill bit according to claim 1 is characterized in that cylinder (5) stretches out part (6) shape rounded oval or square or triangle or the knife-edge or the pancake of bore bit.

6. a kind of Seizing-proof rock-drill bit according to claim 5 is characterized in that cylinder stretches out the part of bore bit (6) shape ovalize, has the ball tooth on the face.

7. a kind of Seizing-proof rock-drill bit according to claim 1 is characterized in that the degree of depth of circular hole (8) is lower than the length of thickening layer (4).

8. a kind of Seizing-proof rock-drill bit according to claim 2 is characterized in that thickening layer length is 20mm.