CN2277452Y

CN2277452Y - Structure of separating borehole-enlarging drill bit

Info

Publication number: CN2277452Y
Application number: CN 96230214
Authority: CN
Inventors: 刘明进
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-07-08
Filing date: 1996-07-08
Publication date: 1998-04-01
Anticipated expiration: 2006-07-08

Abstract

The utility model relates to a structure of a separating type borehole enlarging drill bit, which comprises a main drill bit and an auxiliary drill bit, wherein the end parts of the main drill bit and the auxiliary drill bit are respectively provided with a plurality of slag slopping holes, slag guide holes, tungsten steel beads, etc. The middle part of the main drill bit is provided with a barrier flange, and a plurality of key grooves parallel to a centerline and an annular groove vertical to the centerline are arranged on the peripheral wall of the front end of the flange. The inner edge of the auxiliary drill bit is correspondingly provided with a plurality of key grooves parallel to the centerline and an annular groove vertical to the centerline, and the auxiliary drill bit can be sheathed at the front end of the main drill bit and fixed to the main drill bit through a key rod and a buckling ring. When the main drill bit is drawn away backwards, the auxiliary drill bit is disengaged from the main drill bit and can stay in a primary hole.

Description

The structure of separate type reaming bit

The utility model relates to the structure of separate type reaming bit, the structure of particularly detachable reaming bit.

The at present real brill pick method of using roughly is divided into inner striking type, external striking type and rotary three kinds, drill bit commonly used is had nothing in common with each other and can't be replaced use, wherein: inner striking type is provided with beche foremost at drilling rod, mat rotating head continuation rotation is on the one hand simultaneously hit the stratum by beche on the other hand continuously during construction; Its advantage is: 1, little to the stratum rate of excitation, and 2, the proportion of goods damageds are low, 3, the efficient height.Shortcoming is: 1, can't do two telescopic constructions, 2, the easy formation of avalanche such as inapplicable mud layer, layer of sand or gravel bed.External striking type hits head at the whirler head oil pressure of arranging in pairs or groups, and exerting all one's strength is passed to the domain directly to hit drilling rod (containing sleeve pipe, extension bar etc.) by the drilling rod rear end during construction, constructs and can connect outer tube easily; Its advantage is: 1, applied widely, comprise the stratum of sandstone, shale, mud stone, An Shanyan, gravel rock etc.2, facility assembling and operation simple light.Shortcoming is: the transmission efficiency loss of hitting power is big, the construction cost height.2, noise is big.3, the material of inside and outside extension bar (or sleeve pipe) need very hardly be particular about facility cost height.Rotary based on rotating head, during construction only the mat augers pierce the stratum; Its advantage is: 1, the geology destructiveness is little.2, noise is little.3, can do major diameter Chinese toon hole construction (diameter can reach 3M).Shortcoming is: brill pick power is poor, is unsuitable for the hard laccolite is constructed.Method in sum, the shortcoming and the restriction of its existence are all arranged in use, especially general stratum is all very complicated, be not to finish with single construction form, especially use when a kind of engineering of tunneltron curtain, one sleeve pipe must be retained in the Chinese toon hole as the support of tunnel wall, the necessity to its improvement is arranged really.

The purpose of this utility model is to provide a kind of structure of the separate type reaming bit applicable to various forms ground facility.

In order to achieve the above object, the structure of separate type reaming bit of the present utility model mainly is made up of main drill bit and secondary drill bit, has several spray cinder holes respectively, leads cinder hole, wolfram steel pearl etc. at main drill bit and secondary drill bit end; Wherein, the pars intermedia tool one of main drill bit is kept out flange, and has several keyway parallel with center line on the perisporium of this flange front end, and one annular groove perpendicular to center line; The edge within it of secondary drill bit correspondence has several keyway parallel with center line, and one annular groove perpendicular to center line, and can be set in main chisel edge, and mat key lever and clasp are fixed on the main drill bit, and prolongs secondary drill bit trailing edge and can be socketed with outer tube; When main honor head detached backward, secondary drill bit will break away from main drill bit and be retained in the Chinese toon hole.

The utility model has the advantages that: 1, can adapt to various bad ground situation constructions, reach the brill pick effect of heavy caliber and high depth; 2, applicable to inner striking type, external striking type or inside and outside hit compatible formula method; 3, when doing the inner striking type construction, also can be with cannula configuration, and bar can separate purpose that reaches indwelling casing tube and the strength of materials requirement that reduces sleeve pipe easily in it with outer tube.

Below in conjunction with accompanying drawing, structure of the present utility model, technical characterictic are described further.

Description of drawings: Fig. 1 is the three-dimensional illustration of implementing of the present utility model

Fig. 2 is the three-dimensional exploded view of the utility model separate type reaming bit

Fig. 3 is that another separate type reaming bit of the utility model is implemented illustration.

See also shown in Fig. 1-3, the structure of the utility model separate type reaming bit comprises that mainly main drill bit 1 and secondary drill bit 2 form, has several respectively in main drill bit 1 and secondary drill bit 2 ends and sprays cinder holes 11, leads cinder hole 12,21, wolfram steel pearl 13,22 etc.; This drill bit device is at drilling rod 61 front ends of general drilling machine 6, rotating head 62 by drilling rod 61 rear ends drives rotation continuously, and by device drilling rod 61 in foremost the inner striking type beche or hit head with the external striking type oil cylinder of rotating head 62 adaptation arrangements and impose brill pick work; Wherein, keep out flange 14, and on the perisporium of these flange 14 front ends, have several keyway parallel 15, and be provided with annular groove 16 one perpendicular to center line with center line at the pars intermedia tool one of drill bit 1; The edge within it of secondary drill bit 2 correspondences has several keyway parallel with center line 23, and one annular groove 24 perpendicular to center line, and can be set in main drill bit 1 front end, mat key lever 3 and clasp 4 intercalations are between above-mentioned two corresponding keyways and annular groove, the front end that secondary drill bit 2 is fixed at main drill bit 1, and support to end at flange 14 places of main drill bit 1 by its rear end, can hit the percussion power of head to bore pick work with the oil pressure that main drill bit 1 is accepted inner striking type air hammer or external striking type in the lump; Other prolongs secondary drill bit trailing edge can be socketed with outer tube 5; When main drill bit 1 detaches backward, secondary drill bit 2 will can break away from naturally with main drill bit 1, together be retained in the Chinese toon hole with thereafter outer tube 5, with as supporting and prevent that the Chinese toon hole from subsiding, or insert steel key or reinforcing cage again in outer tube 5.Main drill bit 1 of the present utility model must be contained in drilling rod 61 front ends with secondary drill bit 2, freely select to cooperate the beche established in drilling rod 61 front ends or drilling rod rear end and rotating head 62 to set the injection mode of the oil pressure strike head of one, through the transmission of drill configurations and in the lump the work of knocking is bestowed on the stratum, can guide an outer tube 5 by the reaming effect of secondary drill bit 2 at the same time enters in the Chinese toon hole, extract drilling rod 61 and main drill bit 1 after the degree of depth of waiting to reach predetermined out, insert steel key or reinforcing cage again in outer tube 5, after grouting finishing basic Chinese toon or earth anchor engineering, or also can optionally outer tube 5 be extracted out in the process of grouting.Drill configurations of the present utility model, wherein main drill bit 1 can bore the construction of pick method with inner striking type or external striking type, can hit the two-tube construction method (general alleged reaming Chinese toon) of compatible formula or external striking type inside and outside imposing after main drill bit 1 adds the secondary drill bit 2 of cover again; Therefore, drill configurations of the present utility model can be according to formation condition, and desire is bored the pick bore and selected proper method to construct with the degree of depth, (as: mud (rock) layer that easily collapses in weakness, and the boring bore in the degree of depth 50M, can cooperate drill bit construction of the present utility model by external striking type at φ 200mm; In the rock stratum of hard again high degree of collapsing, cooperate drill bit construction of the present utility model with inner striking type, the caliber size of holing or the degree of depth all have high efficiency, benefit performance cheaply.) only limit to the restriction that single worker's method is used to improve known drill configurations, and the construction of specific formation condition restriction, and then can reach the work purpose of expection, and reduce construction cost.Because secondary drill bit 2 of the present utility model transmits its strike impulse force by the flange 14 of main drill bit 1, cause with its outer tube that advances 5 power that is not impacted at work, making outer tube 5 as need put material requirements used when staying in the Chinese toon hole can be too high, reduces the cost of leave-on sleeve pipe; The external diameter of secondary drill bit 2 also can be unrestricted in addition, carries out bigbore brill pick work and hit compatible formula punch method inside and outside cooperating.

Claims

A kind of structure of separate type reaming bit comprises main drill bit and secondary drill bit composition, has several spray cinder holes respectively, leads cinder hole, wolfram steel pearl etc. at main drill bit and secondary drill bit end; It is characterized in that:

The pars intermedia tool one of main drill bit is kept out flange, and has several keyway parallel with center line on the perisporium of this flange front end, and one annular groove perpendicular to center line;

The edge within it of secondary drill bit correspondence has several keyway parallel with center line, and one annular groove perpendicular to center line, and can be set in main chisel edge, and mat key lever and clasp are fixed on the main drill bit, and prolongs secondary drill bit trailing edge and can be socketed with outer tube;

When main drill bit detached backward, secondary drill bit will break away from main drill bit and be retained in the spring hole.