CN2773298Y

CN2773298Y - Spiral drilling bit with telescopic tip

Info

Publication number: CN2773298Y
Application number: CN 200420115355
Authority: CN
Inventors: 黎中银; 李正泉
Original assignee: Beijing Sany Heavy Machinery Co Ltd
Current assignee: Beijing Sany Heavy Machinery Co Ltd; Sany Heavy Machinery Ltd
Priority date: 2004-11-23
Filing date: 2004-11-23
Publication date: 2006-04-19
Anticipated expiration: 2014-11-23

Abstract

The utility model relates to a spiral drilling bit provided with a telescopic drilling tip. The utility model comprises a cylindrical core pipe, wherein the outer side wall of the core pipe is provided with a plurality of spiral blades; the outer ends of the spiral blades are provided with cutting knife blades; the lower part in the core pipe can be provided with a piston or a plunger in a slide mode; at least one sliding long key is arranged between the piston or the plunger and the core pipe; the side wall of the lower part of the piston or the plunger is provided with at least one slurry discharging hole; the top end of each slurry discharging hole is provided with a movable flashboard in an outward turning and opening mode; the bottom end of the piston or the plunger is fixed with the drilling tip; the piston or the plunger is sealed in the core pipe by using a clamping board. The aim of the utility model is to provide the spiral drilling bit which is provided with the telescopic drilling tip, wherein the spiral drilling bit has the advantages of good core pipe tightness and stable and reliable stake forming quality, and the spiral drilling bit can prevent the scrapping of a drilled well caused by components of a drilling tool. The utility model is the spiral drilling bit which is provided with the telescopic drilling tip, wherein the spiral drilling bit can be applied to a new pump pressure concrete filling construction method of a long spiral pipe drilling (i.e. a CFG artificial method), and various construction methods of strict sealing requirements.

Description

Augers with scalable apex point

Technical field

The utility model relates to the augers with scalable apex point that a kind of long-spiral drilling machine is used, and is applicable to the various job practicess of interior pump pressure concrete pouring pile novel construction method (being CFG worker's method) of long screw auger inlet pipe and seal request strictness.

Background technology

Pump pressure concrete pouring pile novel construction method (being CFG worker's method) is had relatively high expectations to the drilling tool sealing performance in the long screw auger inlet pipe, if infiltrate muddy water in the core barrel, will influence pile quality, even might cause into pile foundation and scrap.Existing some long-spiral drilling machine employing activity flashboard is the augers of apex point fixedly, is easy to occur muddy water and infiltrates in the core barrel, influences pile quality.The long-spiral drilling machine employing of every Western Europe country is provided with a chain sling in core barrel inside, be used for connecting the end cap and the apex point of elongated helical blade drilling tool, in boring the pick operation process, whenever carrying out the slip casting operation, the cement paste of high pressure can produce stronger percussion to chain sling, end cap and apex point during by core barrel, the seal that not only usually will seal gap between core barrel and the end cap pours in the boring, sometimes even with chain sling, end cap and apex point also washed out, fall in the boring, causing boring the pick operation can't carry out, and causes drilling well to scrap.

The utility model content

The purpose of this utility model provides a kind of core barrel good airproof performance, pile quality is reliable and stable, the augers with scalable apex point that can avoid the drilling tool component to cause drilling well to be scrapped, it is applicable to the augers with scalable apex point of the various job practicess of pump pressure concrete pouring pile novel construction method (being CFG worker's method) and seal request strictness in the long screw auger inlet pipe.

Augers with scalable apex point of the present utility model, comprise columnar core barrel, the lateral wall of core barrel is provided with the multi-head spiral blade, the outer end of multi-head spiral blade has cutting tip, bottom in the described core barrel can be provided with piston or plunger slidably, cooperate between the lateral wall of piston or plunger and the inside wall of core barrel and link to each other, the sidewall of piston or plunger bottom is provided with at least one plasma discharge hole, can overturn outwardly and be provided with movable flashboard with opening in the top in each plasma discharge hole, the bottom of described piston or plunger is fixed with apex point, piston or plunger adopt clamp to be encapsulated in the described core barrel, are provided with at least one seal on the top of piston or plunger.

Augers with scalable apex point of the present utility model is provided with at least one long key that slides between wherein said piston or plunger and the core barrel,

Adopt spline fitted to link to each other between the augers with scalable apex point of the present utility model, wherein said piston or plunger and core barrel.

Augers with scalable apex point of the present utility model, the cross section of wherein said piston or plunger are to cooperate the regular polygon that links to each other with the cross section of core barrel.

Augers with scalable apex point of the present utility model, wherein said plasma discharge hole is two, and the long key of described slip is two, and described seal is two.

Of the present utility model have the augers of scalable apex point when carrying out the slip casting operation, the cement paste of high pressure enters piston or plunger by core barrel, and promote piston or plunger moves downward, blocked by clamp up to piston or plunger, meanwhile, along with piston or plunger move downward, the movable flashboard that is positioned on piston or the plunger sidewall can be pushed open by the cement paste of high pressure, water under high pressure mud will be gushed out by the plasma discharge hole, promptly can finish the slip casting operation.Because the core barrel good airproof performance can not infiltrate muddy water, has improved pile quality thus.In addition, because each parts design of the augers with scalable apex point of the present utility model is reasonable, be connected firmly, so can avoid the drilling tool component to cause drilling well to be scrapped.

Below in conjunction with accompanying drawing the augers with scalable apex point of the present utility model is described further.

Description of drawings

Fig. 1 is the front view of the structural representation of the augers with scalable apex point of the present utility model.

The specific embodiment

As seen from Figure 1, augers with scalable apex point of the present utility model, comprise columnar core barrel 1, the lateral wall of core barrel 1 is provided with multi-head spiral blade 2, the outer end of multi-head spiral blade 2 has cutting tip 3, bottom in the core barrel 1 can be provided with piston or plunger 4 slidably, be provided with two long keys 5 that slide between piston or plunger 4 and the core barrel 1 symmetrically, also can adopt spline fitted to link to each other (not drawing among the figure) between piston or plunger 4 and the core barrel 1, the cross section of piston or plunger 4 also can be for cooperating the square that links to each other with the cross section of core barrel 1, regular polygons such as regular hexagon (not drawing among the figure).Be provided with two plasma discharge holes 6 on the sidewall of piston or plunger 4 bottoms symmetrically, can overturn outwardly and be provided with movable flashboard 7 with opening in the top in each plasma discharge hole 6, be provided with two seals 10 on the top of piston or plunger 4, be used to seal the gap between core barrel 1 and piston or the plunger 4.Bottom at piston or plunger 4 is fixed with apex point 8, and piston or plunger 4 adopt clamp 9 to be encapsulated in the core barrel 1.

Augers with scalable apex point of the present utility model is when normal drilling well, piston or plunger 4 are positioned at core barrel 1, two plasma discharge holes 6 are in by movable flashboard 7 closed conditions, when core barrel 1 rotation, piston or plunger 4 also rotate under the effect of two long keys 5 that slide synchronously, thereby make the bottom apex point 8 that is fixed on piston or plunger 4 also rotate synchronously.When carrying out the slip casting operation, the cement paste of high pressure enters piston or plunger 4 by core barrel 1, and promote piston or plunger 4 moves downward, blocked by clamp 9 up to piston or plunger 4, meanwhile, along with piston or plunger 4 move downward, two movable flashboards 7 that are positioned on piston or plunger 4 sidewalls can be pushed open by the cement paste of high pressure, water under high pressure mud will be gushed out by two plasma discharge holes 6, promptly can finish the slip casting operation.Because each parts design of the augers with scalable apex point of the present utility model is reasonable, is connected firmly, so can avoid the drilling tool component to cause drilling well to be scrapped.

Embodiment recited above is described preferred implementation of the present utility model; be not that design of the present utility model and scope are limited; do not breaking away under the utility model design scheme prerequisite; common engineers and technicians make the technical solution of the utility model in this area various modification and improvement; all should fall into protection domain of the present utility model; the technology contents that the utility model is asked for protection all is documented in claims.

Claims

1. the augers that has scalable apex point, comprise columnar core barrel (1), the lateral wall of core barrel (1) is provided with multi-head spiral blade (2), the outer end of multi-head spiral blade (2) has cutting tip (3), it is characterized in that: the bottom in the described core barrel (1) can be provided with piston or plunger (4) slidably, cooperate between the lateral wall of piston or plunger (4) and the inside wall of core barrel (1) and link to each other, the sidewall of piston or plunger (4) bottom is provided with at least one plasma discharge hole (6), can overturn outwardly and be provided with movable flashboard (7) with opening in the top in each plasma discharge hole (6), the bottom of described piston or plunger (4) is fixed with apex point (8), piston or plunger (4) adopt clamp (9) to be encapsulated in the described core barrel (1), are provided with at least one seal (10) on the top of piston or plunger (4).

2. the augers with scalable apex point according to claim 1 is characterized in that: be provided with at least one long key (5) that slides between described piston or plunger (4) and the core barrel (1),

3. the augers with scalable apex point according to claim 1 is characterized in that: adopt spline fitted to link to each other between described piston or plunger (4) and the core barrel (1).

4. the augers with scalable apex point according to claim 1 is characterized in that: the cross section of described piston or plunger (4) is to cooperate the regular polygon that links to each other with the cross section of core barrel (1).

5. the augers with scalable apex point according to claim 2 is characterized in that: described plasma discharge hole (6) is two, and the long key of described slip (5) is two, and described seal (10) is two.