CN203879389U - Drill bit for hard sandy soil - Google Patents

Drill bit for hard sandy soil Download PDF

Info

Publication number
CN203879389U
CN203879389U CN201420214366.4U CN201420214366U CN203879389U CN 203879389 U CN203879389 U CN 203879389U CN 201420214366 U CN201420214366 U CN 201420214366U CN 203879389 U CN203879389 U CN 203879389U
Authority
CN
China
Prior art keywords
blade
hilt
cutter head
drill body
interior
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn - After Issue
Application number
CN201420214366.4U
Other languages
Chinese (zh)
Inventor
张国柱
朱亚萍
段国平
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanghai Engineering Machinery Co Ltd
Original Assignee
Shanghai Engineering Machinery Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shanghai Engineering Machinery Co Ltd filed Critical Shanghai Engineering Machinery Co Ltd
Priority to CN201420214366.4U priority Critical patent/CN203879389U/en
Application granted granted Critical
Publication of CN203879389U publication Critical patent/CN203879389U/en
Withdrawn - After Issue legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

A drill bit for hard sandy soil comprises a drill bit center assembly, lower cutter bodies, inner cutter bodies, blades, outer cutter bodies, supporting plates and abrasion-resistant plates. The lower cutter bodies and the inner cutter bodies are fixed to the lower end and the outer circumference of the lower portion of a drill bit body respectively. The number of the blades ranges from two to six, the blades are evenly distributed and fixed to the outer circumference of the drill bit body in a radial surrounding mode, and the outer cutter bodies are fixed to the lower portions of the blades. Moreover, outer cutter bodies which range from two to eight are installed on each blade, and excepting the outer cutter bodies at the free ends of the blades, the outer cutter bodies on each blade and the outer cutter bodies on the other blade are arrayed in an intersected mode at the rotary positions. The blades and the drill bit body are fixed through the supporting plates. The abrasion-resistant plates are fixedly installed on the arc faces of the free ends of the blades, the side faces of the outer cutter bodies at the outermost ends and the side faces of the inner cutter bodies. The lower cutter bodies, the inner cutter bodies and the outer cutter bodies are installed in the direction where inner cutter heads, lower cutter heads and outer cutter heads face the rotating direction of the drill bit body. Working efficiency is effectively improved, the combining strength of the cutter heads and cutter handles is high, abrasion to the cutter bodies and the blades is slowed down, and construction quality is guaranteed.

Description

A kind of hard sand soil drill bit
Technical field
The utility model belongs to a kind of drill bit of building trade construction, is specifically related to a kind of hard sand soil drill bit, can be widely used in highrise building underground installation, Metro station excavation is gone along with sb. to guard him and the underground deep foundation engineering such as river dyke reinforcing.
Background technology
In urban skyscraper, Deep Foundation Pit of Metro Stations, go along with sb. to guard him, in the process of construction of the underground infrastructures such as river dyke anti-seepage reinforcing and Soft Soil improvement reinforcing, the a large amount of SMW of employing engineering method equipment is built diaphragm wall at present, use multiple-drill press to carry out boring continuously pick, and by soil and cement paste mix and blend insert the technology that shaped steel is built ground lower block soil mine dam in situ, play that gear is native, antiseepage effect.
In the prior art, general improved long-spiral drilling machine drilling tool and the drill bit of adopting of drill bit of multiple-drill press, as Chinese utility model patent ZL200720070011.2, name are called a kind of novel drilling tool, it is that two helical blades of employing are fixed on drilling rod leading section, three row's cutter hub cross arrangements are fixed on the technology such as 2 helical blade bases, cutter head body Tungsten Carbide Surfacing; When multiple-drill press is when hard Flooding in Borehole carries out bore operation, can cause the quality problems such as cutter edge serious wear, cutter head come off, blade wear fracture, not only affect the efficiency of construction of bore operation, and make drilling quality unstable, directly affect construction of diaphragm wall quality.For another example Chinese utility model patent ZL201010128294.8, name is called a kind of high-strength composite drill bit, it adopts lower knife body to be fixed on the bottom of drilling pipe, interior cutter hub is fixed on the outer peripheral face of drilling pipe bottom, 2~4 blades are fixed on the outer peripheral face of drilling pipe bottom, and the fixing a plurality of outer cutter hubs of cross arrangement on each blade, and at lower knife body, interior cutter hub and outer cutter hub adopt induction brazing technique welding carbide bit, and the free-ended arc surface of blade is provided with the technology such as netted wearing layer, when multiple-drill press uses this drill bit to carry out diaphragm wall brill pick construction on hard sand soil stratum, operating efficiency is greatly improved, tool bit abrasion situation obtains certain slowing down, but fin or blade are owing to being subject to occurring buckling deformation compared with wammel pick resistance, the situation of serious wear, also there are the quality problems of serious wear in hilt simultaneously, thereby cause diaphragm wall quality of wall to can not get ensureing, affected construction speed.
Utility model content
The purpose of this utility model is according to the deficiencies in the prior art, provides that a kind of brill pick ability is strong, cutter head intensity is high, and cutter hub and blade are wear-resisting, deformation resistance good, the hard sand soil drill bit that diaphragm wall quality of wall is high and operating efficiency significantly improves.
The utility model is achieved through the following technical solutions:
A hard sand soil drill bit, comprising:
Bit central assembly, comprises drill body, is arranged on Grouting Pipe, plug screw, catch and joint in drill body or on drill body;
Lower knife body, comprises lower cutter head and lower hilt;
Interior cutter hub, comprises interior cutter head and interior hilt;
Outer cutter hub, comprises outer cutter head and outer hilt;
Blade, comprises blade face and following;
Some gripper shoes and a plurality of wearing plate;
It is characterized in that:
The bottom of the Grouting Pipe in described drill body is provided with along its radial direction circumference uniform distribution or the transverse pipe that is arranged symmetrically with and be communicated with Grouting Pipe (11), and plug screw is installed in its end; Described catch is installed in the heavy hole of the Grouting Pipe on the lower surface of drill body;
Described lower knife body has 2~6, and they are weldingly fixed on by lower hilt circumference uniform distribution or radial symmetric on the outer peripheral face of bottom of drill body, and makes its lower cutter head be mounted to the direction of rotation towards drill body;
Described interior cutter hub has 2~6, and the lower surface that they are weldingly fixed on drill body by interior hilt circumference uniform distribution or radial symmetric is located, and makes cutter head in it be mounted to the direction of rotation towards drill body;
Described blade has 2~6, and they are on radiation state is fixed on its underpart in uniform way outer peripheral face around drill body and are positioned at the top of cutter hub;
One end of described gripper shoe and drill body outer wall are fixed, and the blade face of the other end and blade is fixed;
Described outer cutter hub by outer hilt be weldingly fixed on blade below on, and outer cutter hub is provided with 2~8 on each blade, outside cutter hub on blade free end, the position of the position of the outer cutter hub on each blade and the upper outside cutter hub of another blade is cross arrangement on position of rotation;
Described lower cutter head, interior cutter head and outer cutter head are integrally welded with lower hilt, interior hilt and outer hilt respectively;
Described wearing plate is installed in respectively the outer cutter hub side of free end cambered surface, outermost end and the interior cutter hub side of blade and drill body concentric.
The utility model can be that each tilts the blade face of described blade naturally in the same direction, and angle α=45~75 ° between drill body longitudinal center line; Angle or the following extension line of blade and angle of cut β=15~45 ° of drill body lower surface below and between drill body cross section of described blade, and the blade face of blade is to become identical inclination angle to be radially symmetrically welded on the outer peripheral face that is fixed on drill body bottom with horizontal plane.
The utility model can also be, angle γ=α+2~5 ° between the base of described outer cutter head and the longitudinal center line of drill body.
The utility model can also be that described lower cutter head, interior cutter head and outer cutter head adopt hard alloy blocks to make.
The utility model can also be that described lower hilt, interior hilt, blade and outer hilt adopt carbon steel or low alloy steel material to make.
The utility model can also be that described lower cutter head, interior cutter head and outer cutter head adopt induction brazing technique to be weldingly fixed on respectively the end of lower hilt, interior hilt and outer hilt.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is further described:
Fig. 1 is the structural representation of the hard sand soil drill bit of the utility model;
Fig. 2 is the top view of Fig. 1;
Fig. 3 is the upward view of Fig. 1;
Fig. 4 is the right view of Fig. 1;
Fig. 5 is that the A-A of Fig. 1 is to sectional view;
Fig. 6 is that the B-B of Fig. 1 is to sectional view;
Fig. 7 is that the C-C of Fig. 4 is to sectional view.
The specific embodiment
As shown in Fig. 1-7, a kind of hard sand soil drill bit, comprising: bit central assembly, comprises drill body 1, is arranged on Grouting Pipe 11, plug screw 12, catch 14 and joint 17 in drill body 1 or on drill body 1; Lower knife body 2, comprises lower cutter head 21 and lower hilt 22; Interior cutter hub (3), comprises interior cutter head 31 and interior hilt 32; Outer cutter hub 5, comprises outer cutter head 51 and outer hilt 52; Blade 4, comprises blade face 40 and following 42; Some gripper shoes 6 and a plurality of wearing plate 7; Wherein: the bottom of the Grouting Pipe 11 in described drill body 1 is provided with along its radial direction circumference uniform distribution or the transverse pipe 112 that is arranged symmetrically with and be communicated with Grouting Pipe (11), and plug screw 12 is installed in its end; Described catch 14 is installed in the heavy hole of the Grouting Pipe 11 on the lower surface of drill body 1; Described lower knife body 2 has 2~6, and they are weldingly fixed on the lower, outer perimeter face of drill body 1 by lower hilt 22 circumference uniform distributions or radial symmetric, and its lower cutter head 21 is mounted to towards the direction of rotation of drill body 1; Described interior cutter hub 3 has 2~6, and the lower surface that they are weldingly fixed on drill body 1 by interior hilt 32 circumference uniform distributions or radial symmetric is located, and cutter head 31 in it is mounted to towards the direction of rotation of drill body 1; Described blade 4 has 2~6, and they are on radiation state is fixed on its underpart in uniform way outer peripheral face around drill body 1 and are positioned at the top of cutter hub 3; The blade face 40 of described blade 4 respectively tilts naturally in the same direction, and angle α=45~75 ° between drill body 1 longitudinal center line; Angle between following 42 and drill body 1 cross section of described blade 4 or following 42 extension lines of blade 4 and angle of cut β=15~45 ° of drill body 1 lower surface, and the blade face 40 of blade 4 is to become identical inclination angle to be radially symmetrically welded on the outer peripheral face that is fixed on drill body 1 bottom with horizontal plane; Angle γ=α+2~5 ° between the longitudinal center line of the base of described outer cutter head 51 and drill body 1, wherein, α is the angle between the blade face 40 of above-mentioned blade 4 and the longitudinal center line of drill body 1.One end of described gripper shoe 6 and drill body 1 outer wall are fixed, and the blade face 40 of the other end and blade 4 is fixing, can effectively improve rigidity and the intensity of blade 4, avoid blade buckling deformation; Described outer cutter hub 5 by outer hilt 52 be weldingly fixed on blade 4 following 42 on, and outer cutter hub 5 is provided with 2~8 on each blade 4, outside cutter hub 5 on blade 4 free ends, the position of the position of the outer cutter hub 5 on each blade 4 and the upper outside cutter hub 5 of another blade 4 is cross arrangement on position of rotation, so that guarantee in drilling process can be all and even ground auger digging layer; Described lower cutter head 21, interior cutter head 31 and outer cutter head 51 are integrally welded with lower hilt 22, interior hilt 32 and outer hilt 52 respectively; Described lower cutter head 21, interior cutter head 31 and outer cutter head 51 adopt hard alloy blocks to make, and their front end has respectively lower cutting edge, interior cutting edge and outer cutting edge; Described lower cutter head 21, interior cutter head 31 and outer cutter head 51 adopt induction brazing technique to be weldingly fixed on respectively the end of lower hilt 22, interior hilt 32 and outer hilt 52, effective adhesion strength that increases lower cutter head 21 and lower hilt 22, interior cutter head 31 and interior hilt 32 and outer cutter head 51 and outer hilt 52, prevents that the situation that cutter head comes off and ruptures from appearring in lower cutting edge, interior cutting edge and outer cutting edge when boring pick; Described lower hilt 22, interior hilt 32, blade 4 and outer hilt 52 adopt carbon steel or low alloy steel material to make, and can improve its intensity; Described wearing plate 7 is installed in respectively outer cutter hub 5 sides of free end cambered surface, outermost end and interior cutter hub 3 sides of blade 4 and drill body 1 concentric, to slow down the abrasion condition of blade 4, outer cutter hub 5 and interior cutter hub 3, improve its anti-wear performance, thereby further improve diaphragm wall quality of wall.
The hard sand soil drill bit of the utility model, by lower knife body, interior cutter hub and three layers of cutting cutter hub of outer cutter hub are set on the bottom at drill body, lower end cylindrical and blade, making SMW engineering method rig is in multiple-drill press drilling process, to realize lower knife body, interior cutter head and the cutting of outer cutter head synchronous drilling, and bore operation efficiency significantly improves; Be fixed on rigidity and intensity that gripper shoe between drill body outer wall and blade effectively improves blade 4, avoid blade buckling deformation; The cutter head of being made by hard alloy blocks and hilt adopt induction brazing technique to weld, and effectively improve the bond strength of cutter head and hilt, avoid cutter head to come off or burst apart, situation that tool bit abrasion is fast; Be installed in the abrasion condition that the outer cutter hub side of free end cambered surface, outermost end of blade and drill body concentric and the wearing plate of interior cutter hub side can slow down blade, outer cutter hub and interior cutter hub, improve its anti-wear performance, further improve diaphragm wall quality of wall.

Claims (6)

1. a hard sand soil drill bit, comprising:
Bit central assembly, comprises drill body (1), is arranged on Grouting Pipe (11), plug screw (12), catch (14) and joint (17) in drill body (1) or on drill body (1);
Lower knife body (2), comprises lower cutter head (21) and lower hilt (22);
Interior cutter hub (3), comprises interior cutter head (31) and interior hilt (32);
Outer cutter hub (5), comprises outer cutter head (51) and outer hilt (52);
Blade (4), comprises blade face (40) and following (42);
Some gripper shoes (6) and a plurality of wearing plate (7);
It is characterized in that:
The bottom of the Grouting Pipe (11) in described drill body (1) is provided with along its radial direction circumference uniform distribution or the transverse pipe (112) that is arranged symmetrically with and be communicated with Grouting Pipe (11), and plug screw (12) is installed in its end; Described catch (14) is installed in the heavy hole of the Grouting Pipe (11) on the lower surface of drill body (1);
Described lower knife body (2) has 2~6, and they are weldingly fixed on the lower, outer perimeter face of drill body (1) by lower hilt (22) circumference uniform distribution or radial symmetric, and its lower cutter head (21) is mounted to towards the direction of rotation of drill body (1);
Described interior cutter hub (3) has 2~6, and they are weldingly fixed on the place, lower surface of drill body (1) by interior hilt (32) circumference uniform distribution or radial symmetric, and cutter head (31) in it is mounted to towards the direction of rotation of drill body (1);
Described blade (4) has 2~6, and they are on radiation state is fixed on its underpart in uniform way outer peripheral face around drill body (1) and are positioned at the top of cutter hub (3);
One end of described gripper shoe (6) and drill body (1) outer wall are fixed, and the blade face (40) of the other end and blade (4) is fixing;
Described outer cutter hub (5) is weldingly fixed on following (42) of blade (4) by outer hilt (52), and outer cutter hub (5) is provided with 2~8 on each blade (4), outside cutter hub (5) on blade (4) free end, the position of the outer cutter hub (5) on each blade (4) and the position of the upper outside cutter hub of another blade (4) (5) are cross arrangements on position of rotation;
Described lower cutter head (21), interior cutter head (31) and outer cutter head (51) are integrally welded with lower hilt (22), interior hilt (32) and outer hilt (52) respectively;
Described wearing plate (7) is installed in respectively outer cutter hub (5) side of free end cambered surface, outermost end and interior cutter hub (3) side of blade (4) and drill body (1) concentric.
2. hard sand soil drill bit according to claim 1, it is characterized in that described blade (4) blade face (40) each tilt in the same direction naturally, and angle α=45~75 ° between drill body (1) longitudinal center line; Following (42) of described blade (4) and following (42) extension line of the angle between drill body (1) cross section or blade (4) and angle of cut β=15~45 ° of drill body (1) lower surface, and the blade face (40) of blade (4) is to become identical inclination angle to be radially symmetrically welded on the outer peripheral face that is fixed on drill body (1) bottom with horizontal plane.
3. hard sand soil drill bit according to claim 1 and 2, is characterized in that angle γ=α+2~5 ° between the base of described outer cutter head (51) and the longitudinal center line of drill body (1).
4. according tohard sand soil drill bit claimed in claim 1, is characterized in that described lower cutter head (21), interior cutter head (31) and outer cutter head (51) adopt hard alloy blocks to make.
5. hard sand soil drill bit according to claim 1, is characterized in that described lower hilt (22), interior hilt (32), blade (4) and outer hilt (52) adopt carbon steel or low alloy steel material to make.
6. according to the hard sand soil drill bit described in claim 1 or 4, it is characterized in that described lower cutter head (21), interior cutter head (31) and outer cutter head (51) adopt induction brazing technique to be weldingly fixed on respectively the end of lower hilt (22), interior hilt (32) and outer hilt (52).
CN201420214366.4U 2014-04-29 2014-04-29 Drill bit for hard sandy soil Withdrawn - After Issue CN203879389U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420214366.4U CN203879389U (en) 2014-04-29 2014-04-29 Drill bit for hard sandy soil

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420214366.4U CN203879389U (en) 2014-04-29 2014-04-29 Drill bit for hard sandy soil

Publications (1)

Publication Number Publication Date
CN203879389U true CN203879389U (en) 2014-10-15

Family

ID=51679902

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201420214366.4U Withdrawn - After Issue CN203879389U (en) 2014-04-29 2014-04-29 Drill bit for hard sandy soil

Country Status (1)

Country Link
CN (1) CN203879389U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103939024A (en) * 2014-04-29 2014-07-23 上海工程机械厂有限公司 Drill bit suitable for hard sandy soil

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103939024A (en) * 2014-04-29 2014-07-23 上海工程机械厂有限公司 Drill bit suitable for hard sandy soil
CN103939024B (en) * 2014-04-29 2016-04-20 上海工程机械厂有限公司 A kind of hard sand soil drill bit

Similar Documents

Publication Publication Date Title
CN101812971B (en) Combined bit
CN102434105A (en) Composite bit with rotary cut rock-breaking function
CN102392605A (en) Compound bit formed by PDC (polycrystalline diamond compact) bits and rotary cutting bit
CN105909174A (en) Stirring drilling tool
CN102392603A (en) Compound bit formed by rotary cutting bit and PDC (polycrystalline diamond compact) blades
CN109339709A (en) It is novel to bore PDC cutter composite drill bit again
CN106812470A (en) A kind of borehole-enlarging drilling tool
CN207420457U (en) A kind of composite polycrystal-diamond and the drill bit using this composite sheet
CN101812973B (en) Efficient high-strength composite drill bit
CN201730550U (en) Composite drill
CN203879389U (en) Drill bit for hard sandy soil
CN203879387U (en) Sandy soil drill bit
CN103939024B (en) A kind of hard sand soil drill bit
CN207063984U (en) A kind of soft soil layer slurry shield extra long distance tunnels combined type cutterhead
CN213627443U (en) Polycrystalline diamond compact bit with butterfly-shaped cloth teeth
CN205840789U (en) A kind of all standing type cone palm sheet
CN202441267U (en) Combined drill bit having rock-breaking function through rotary cutting
CN103939021B (en) A kind of sand soil drill bit
CN201826758U (en) Composite drill bit with high efficiency and high strength
CN201024901Y (en) A novel drilling tool
CN201292773Y (en) PDC drill for drilling flexible and hard interactive strata
CN208430975U (en) A kind of long-life single rock bit
CN103195370A (en) Combined type drill bit
CN208122763U (en) A kind of diameter changing drilling tool
CN208203133U (en) A kind of rotary digging cutter barrel brill

Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
AV01 Patent right actively abandoned

Granted publication date: 20141015

Effective date of abandoning: 20160420

C25 Abandonment of patent right or utility model to avoid double patenting