CN208106311U - A kind of major diameter high-pressure blast down-hole hammer - Google Patents

Abstract

The utility model relates to a kind of high wind pressure down-hole hammer of major diameter, the down-hole hammer ontology including center bit, off-balance bit and cylinder；The center bit and down-hole hammer ontology are coaxially disposed and center bit by the multiple connecting columns parallel with the axis of down-hole hammer ontology is fixed on down-hole hammer ontology lower end, each connecting column is evenly distributed around down-hole hammer body axis, and the off-balance bit is rotatably set on each connecting column；Axially extending boss is equipped in the middle part of the center bit rear end；The boss is equipped with the positioning component at least being positioned after off-balance bit is unfolded under the action of the centrifugal force to off-balance bit；It is characterized in that：The positioning component includes the multiple limited blocks and multiple locking pins being hinged on boss for being provided with through slot on off-balance bit and up and down, being fixed on boss side surfaces, the maximum expanded angle of the limited block limitation off-balance bit.

Description

A kind of major diameter high-pressure blast down-hole hammer

Technical field

The utility model relates to a kind of major diameter high-pressure blast down-hole hammers, belong to pile foundation engineering field.

Background technique

The construction of bored concrete pile is divided into pore-forming and pile two parts, and wherein pore-forming is -a link in filling pile construction. In the construction of bored concrete pile, the quality of hole quality directly influences the pile quality after concrete casting：The aperture of stake holes is inclined It is small, the side friction of pile, pile top end bearing capacity are reduced, the bearing capacity of whole stake reduces；Stake holes top is expanding to be will lead to Pile top collateral resistance increases, and lower part collateral resistance cannot play completely, while the concrete of single pile pours fluence increase；Stake holes is inclined Tiltedly changing stake to a certain extent vertically carries mechanical characteristic, weakens effective performance of pile bearing capacity；Pile bottom sediment mistake Thickness makes the long reduction of stake, and ability is held at the end that pile top is then directly affected for end-bearing pile, and down-hole hammer in the prior art is generally equipped with Center bit and off-balance bit, center bit are used to punching of advancing, and off-balance bit is eccentric to the reaming after center bit punches Drill bit is usually the rock stratum for being unfolded and cutting surrounding under the action of the centrifugal force that rotation generates, and cannot effectively be determined after expansion Position, therefore off-balance bit is easy to happen swing in reaming procedure, influences the stability of entire down-hole hammer.

For this problem, the Chinese utility model patent of Patent No. CN206917603U discloses a kind of high wind of major diameter Press down-hole hammer, the down-hole hammer ontology including center bit, off-balance bit and cylinder；The center bit and down-hole hammer ontology are same Axis setting and center bit by the multiple connecting columns parallel with the axis of down-hole hammer ontology is fixed on down-hole hammer ontology lower end, Each connecting column is evenly distributed around down-hole hammer body axis, and the off-balance bit is rotatably set on each connecting column； Axially extending boss is equipped in the middle part of the center bit rear end；The boss is equipped at least after off-balance bit expansion The positioning component that off-balance bit is positioned；Off-balance bit is unfolded under the influence of centrifugal force, can pass through positioning group after expansion Part is positioned, and fixes off-balance bit relative to center bit and down-hole hammer ontology, when the size of centrifugal force reaches certain journey When spending, off-balance bit expansion, while positioning pin overcomes the elastic force of reset spring to be moved radially outward, positioning pin stretches out boss and is followed by It contacts off-balance bit, realizes the positioning to off-balance bit, as long as down-hole hammer keeps revolving speed constant at this time, positioning pin pair can be passed through Off-balance bit carries out stable positioning；Positioning pin is corresponded on the off-balance bit equipped with locating groove, the position root of locating groove It is configured according to the angle for needing off-balance bit to be unfolded, after so that off-balance bit is expanded to required angle, locating groove and positioning pin Relatively, it and then is inserted into locating groove by positioning pin and realizes positioning, the program can be avoided off-balance bit swing, improve down-the-hole The stability of hammer, prolongs the service life, and improves pile foundation engineering quality, but still has following deficiency：

1. during off-balance bit expansion, positioning pin is inserted into card slot, but the process is dynamic process, and positioning pin is difficult to accurately Insertion card slot in；

2. a large amount of hacks can be generated in drilling and reaming procedure, and hack splashes, therefore, in the slot where positioning pin and Card slot content easily flies into soil rubble, cause bolt be stuck can not move or card slot blocking, can not so as to cause positioning component Realization effect.

Utility model content

In order to solve the above-mentioned technical problem, the utility model provides a kind of major diameter high-pressure blast down-hole hammer.The major diameter is high Pressure wind down-hole hammer can be avoided off-balance bit swing, improves the stability of down-hole hammer, prolongs the service life, and improve pile foundation engineering matter Amount, and the realization positioning action of positioning component accurate stable can be made.

The technical solution of the utility model is as follows：

A kind of high wind pressure down-hole hammer of major diameter, the down-hole hammer ontology including center bit, off-balance bit and cylinder；It is described Center bit is coaxially disposed with down-hole hammer ontology and center bit passes through the multiple connections parallel with the axis of down-hole hammer ontology Column is fixed on down-hole hammer ontology lower end, and each connecting column is evenly distributed around down-hole hammer body axis, rotatable on each connecting column It is set with the off-balance bit；Axially extending boss is equipped in the middle part of the center bit rear end；The boss is equipped with Positioning component at least being positioned after off-balance bit is unfolded under the action of the centrifugal force to off-balance bit；The positioning group Part includes being provided with through slot on off-balance bit and up and down, being fixed on multiple limited blocks of boss side surfaces and multiple hinged Locking pin on boss, the maximum expanded angle of the limited block limitation off-balance bit；Between the locking pin and boss First torsional spring is set；The locking pin overcomes the first torsional spring after off-balance bit is expanded to maximum angle under the action of the centrifugal force Torsion downwardly turns over and matches with through slot card.

Wherein, it is equipped with the second torsional spring between each connecting column and corresponding off-balance bit, turns round off-balance bit second It is collapsed under the twisting force of spring to boss.

Wherein, outwardly extending protrusive board is fixed on the boss；Corresponding two pieces of each locking pin be parallel to each other spacing and The protrusive board being vertically arranged；The locking pin is fixedly connected between two protrusive boards with a shaft；The shaft and protrusive board turn Dynamic connection；The protrusive board lateral surface each extends over out blend stop；First torsional spring is provided between the shaft and blend stop.

Wherein, the connecting column and off-balance bit are respectively four.

Wherein, it is equipped on the center bit and down-hole hammer ontology for the lateral pin to connecting column progress axially position.

The utility model has the advantages that：

1, the utility model can be avoided off-balance bit swing, improves the stability of down-hole hammer, prolongs the service life, and improve Pile foundation engineering quality, and the realization positioning action of positioning component accurate stable can be made.

2, the utility model can ensure the positioning to off-balance bit, be able to maintain off-balance bit when cutting different rock-layers Original expanded angle, so that off-balance bit be avoided to swing because of the variation of Cutting Drag.

3, the utility model is provided with through slot, and under self gravitation effect, soil can not block through slot, and locking pin is from upper Under be embedded in through slot and cooperate with through slot, therefore avoid locking pin and influenced to cannot achieve function by soil.

4, the utility model limited block, can limit the expanded angle of off-balance bit, so that locking pin be made to match with through slot Off-balance bit is in non-athletic state when conjunction, it is ensured that locking pin can overturn such as through slot and through slot and cooperate.

5, the utility model is provided with protrusive board, can enhance the lateral support of locking pin, improves the stability of off-balance bit.

6, the utility model is provided with the first torsional spring and the second torsional spring, and when drift stops locking pin can be turned round first The cooperation with through slot is automatically terminated under the twisting force of spring, and collapses off-balance bit to down-hole hammer ontology, reduces its cross section Product, convenient for recycling down-hole hammer, and convenient transportation and loading from hole.

Detailed description of the invention

Fig. 1 is off-balance bit rounding state structural schematic diagram；

Fig. 2 is off-balance bit unfolded state structural schematic diagram；

Fig. 3 is the enlarged drawing of circled in Fig. 1；

Fig. 4 is the schematic front view of the utility model.

Appended drawing reference is expressed as in figure：

1- center bit, 21- through slot, the second torsional spring of 22-, 2- off-balance bit, 3- down-hole hammer ontology, 4- connecting column, 5- are convex Platform, 51- limited block, the first torsional spring of 52-, 53- locking pin, 54- protrusive board, 55- shaft, 56- blend stop, 9- lateral pin.

Specific embodiment

The utility model is described in detail in the following with reference to the drawings and specific embodiments.

Referring to Fig. 1 to Fig. 3, a kind of high wind pressure down-hole hammer of major diameter, including center bit 1, off-balance bit 2 and cylinder Down-hole hammer ontology 3；The center bit 1 be coaxially disposed with down-hole hammer ontology 3 and center bit 1 by with down-hole hammer ontology 3 The parallel multiple connecting columns 4 of axis be fixed on 3 lower end of down-hole hammer ontology, each connecting column 4 is uniformly arranged around 3 axis of down-hole hammer ontology It arranges, is rotatably set with the off-balance bit 2 on each connecting column 4；It is equipped in the middle part of 1 rear end of center bit axial The boss 5 of extension；The boss 5, which is equipped with, to be used at least after off-balance bit 2 is unfolded under the action of the centrifugal force to off-balance bit 2 The positioning component positioned；The positioning component includes being provided with through slot 21 on off-balance bit 2 and up and down, being fixed on Multiple limited blocks 51 of 5 side of boss and multiple locking pins 53 being hinged on boss 5, the limited block 51 limit bias The maximum expanded angle of drill bit 2；First torsional spring 52 is set between the locking pin 53 and boss 5；The locking pin 53 is in bias Drill bit 2 is expanded to overcomes the torsion of the first torsional spring 52 to downwardly turn over and block with through slot 21 under the action of the centrifugal force after maximum angle Match.

Further, it is equipped with the second torsional spring 22 between each connecting column 4 and corresponding off-balance bit 2, makes off-balance bit 2 It is collapsed under the twisting force of the second torsional spring 22 to boss 5.

Further, outwardly extending protrusive board 54 is fixed on the boss 5；Corresponding two pieces of each locking pin 53 mutually flat Line space and the protrusive board 54 being vertically arranged；The locking pin 53 is fixedly connected between two protrusive boards 54 with a shaft 55； The shaft 55 is rotatablely connected with protrusive board 54；54 lateral surface of protrusive board each extends over out blend stop 56；The shaft 55 and blend stop First torsional spring 52 is provided between 56.

Preferably, the connecting column 4 and off-balance bit 2 are respectively four.

Further, it is equipped on the center bit 1 and down-hole hammer ontology 3 for carrying out axially position to connecting column 4 Lateral pin 9.

The working principle of the utility model：

Drilling machine starting, after down-hole hammer revolving speed reaches a certain level, off-balance bit 2 overcomes the second torsional spring under the action of the centrifugal force 22 torsion is expanded to be stopped by limited block 51, meanwhile, locking pin 53 downwardly turns over insertion through slot 21 under the action of the centrifugal force It is interior, to limit the deflection of off-balance bit 2, fix its posture；Up and down due to through slot 21, the soil meeting of through slot 21 is fallen into It is fallen under self gravity or under the extruding of locking pin 53 from 21 lower ending opening of through slot；As long as the revolving speed of down-hole hammer is maintained at one Determine in degree, the positioning of off-balance bit 2 can be kept；

When drilling machine deceleration stops, the centrifugal force that locking pin 53 and off-balance bit 2 are subject to quickly is reduced, and locking pin 53 is first The cooperation of unlock pin 53 and through slot 21 is flipped up under the torsion of torsional spring 52, off-balance bit 2 is no longer influenced by positioning, second It is collapsed under the twisting force of torsional spring 22 to down-hole hammer ontology 3.

The above description is only the embodiments of the present invention, and therefore it does not limit the scope of the patent of the utility model, all Equivalent structure or equivalent flow shift made based on the specification and figures of the utility model, is applied directly or indirectly in Other related technical areas are also included in the patent protection scope of the utility model.

Claims (5)

1. a kind of high wind pressure down-hole hammer of major diameter, the down-hole hammer ontology including center bit (1), off-balance bit (2) and cylinder (3)；The center bit (1) and down-hole hammer ontology (3) be coaxially disposed and center bit (1) by with down-hole hammer ontology (3) The parallel multiple connecting columns (4) of axis be fixed on down-hole hammer ontology (3) lower end, each connecting column (4) is around down-hole hammer ontology (3) axis Line is evenly distributed, and the off-balance bit (2) is rotatably set on each connecting column (4)；After the center bit (1) End middle part is equipped with axially extending boss (5)；The boss (5) is equipped at least in off-balance bit (2) in centrifugation masterpiece With the positioning component positioned after lower expansion to off-balance bit (2)；It is characterized in that：The positioning component includes being provided with partially Through slot (21) on heart drill bit (2) and up and down, multiple limited blocks (51) for being fixed on boss (5) side and multiple hinged Locking pin (53) on boss (5), the maximum expanded angle of limited block (51) limitation off-balance bit (2)；The lock First torsional spring (52) are set between rationed marketing (53) and boss (5)；The locking pin (53) is expanded to maximum angular in off-balance bit (2) The torsion of the first torsional spring (52) is overcome to downwardly turn over and match with through slot (21) card after degree under the action of the centrifugal force.

2. a kind of high wind pressure down-hole hammer of major diameter as described in claim 1, it is characterised in that：Each connecting column (4) and corresponding Off-balance bit (2) between be equipped with the second torsional spring (22), make off-balance bit (2) under the twisting force of the second torsional spring (22) to Boss (5) collapses.

3. a kind of high wind pressure down-hole hammer of major diameter as claimed in claim 2, it is characterised in that：It is fixed on the boss (5) Outwardly extending protrusive board (54)；Corresponding two pieces of each locking pin (53) be parallel to each other spacing and the protrusive boards (54) that are vertically arranged；Institute Locking pin (53) are stated between two protrusive boards (54), are fixedly connected with a shaft (55)；The shaft (55) and protrusive board (54) it is rotatablely connected；Protrusive board (54) lateral surface each extends over out blend stop (56)；Between the shaft (55) and blend stop (56) It is provided with first torsional spring (52).

4. a kind of high wind pressure down-hole hammer of major diameter as claimed in claim 3, it is characterised in that：The connecting column (4) and bias Drill bit (2) is respectively four.

5. a kind of high wind pressure down-hole hammer of major diameter as claimed in claim 4, it is characterised in that：The center bit (1) and latent The lateral pin (9) for connecting column (4) to be carried out with axially position is equipped on drift ontology (3).