CN220015098U

CN220015098U - Mute coring bit

Info

Publication number: CN220015098U
Application number: CN202320992934.2U
Authority: CN
Inventors: 曹瑞雪; 高媛; 宋满荣; 丁胡应; 赵卞; 刘永丽; 陈强; 俞超明; 李冬; 姚东方
Original assignee: China Tiesiju Civil Engineering Group Co Ltd CTCE Group; Construction Engineering Co Ltd of CTCE Group
Current assignee: China Tiesiju Civil Engineering Group Co Ltd CTCE Group; Construction Engineering Co Ltd of CTCE Group
Priority date: 2023-04-27
Filing date: 2023-04-27
Publication date: 2023-11-14
Anticipated expiration: 2033-04-27

Abstract

The utility model discloses a mute coring bit, which belongs to the field of drills for construction of bored piles, and comprises a drilling cylinder, wherein the top of the drilling cylinder is provided with a square head upper disc assembly, the bottom of the drilling cylinder is provided with a slag discharge disc, the center of the bottom of the slag discharge disc is provided with a plurality of conical heads, each conical head comprises a plurality of triangular plates distributed circumferentially, and the outer side walls of the triangular plates are edge parts; the square head upper disc assembly is fixedly connected with the slag discharge disc through a plurality of dowel bars positioned in the drill cylinder, and a pressure plate is arranged at the upper end of the square head upper disc assembly; the bottom of the slag discharging disc is provided with a lower ring tooth head. The mute coring bit has high practicability and high slag discharging efficiency.

Description

Mute coring bit

Technical Field

The utility model relates to the field of drill bits for bored pile construction, in particular to a mute coring bit.

Background

Along with the development of scientific technology, the pile foundation has large bearing capacity and stable structure, and is widely applied to the fields of subway construction, stations, airports, house buildings and the like, but how to control noise during the construction of the existing pile machine is a serious difficulty. The existing effective solving measures are that slag in the drilling cylinder is pushed out of the drilling cylinder by adopting a slag discharge disc, so that the device can aim at different soil layers, and has low noise and wide application range. However, when the lower circle bit in the existing core bit is suitable for the weakly weathered soil layer, large rocks possibly exist in the rotary digging process, the rocks are blocked at the lower circle position, and the slag discharging disc is at a certain distance from the hole, so that the rocks are difficult to be completely pushed out. Based on the above, the utility model provides a mute core drill bit.

Disclosure of Invention

The object of the present utility model is to provide a silent coring bit that solves the above-mentioned problems.

In order to solve the technical problems, the utility model adopts the following technical scheme:

the utility model relates to a mute coring bit, which comprises a drilling barrel, wherein the top of the drilling barrel is provided with a square head upper disc assembly, the bottom of the drilling barrel is provided with a slag discharge disc, the center of the bottom of the slag discharge disc is provided with a plurality of conical heads, each conical head comprises a plurality of triangular plates distributed circumferentially, and the outer side wall of each triangular plate is a blade part; the square head upper disc assembly and the slag discharge disc are fixedly connected together through a plurality of dowel bars positioned in the drill cylinder, and a pressure plate is arranged at the upper end of the square head upper disc assembly; the bottom of the slag discharge disc is provided with a lower ring tooth head.

Further, the square head upper disc assembly comprises an upper disc and square head reinforcing rib plates fixed on the upper end face of the upper disc, and a plurality of dowel steel protective sleeves matched with the dowel steel are arranged on the upper end face of the upper disc.

Further, the top end of the dowel bar protecting sleeve faces to the pressure plate, the dowel bar protecting sleeve is positioned at the periphery of the square head reinforcing rib plate, and a plurality of through holes matched with the dowel bar are formed in the pressure plate and the slag discharging plate; the top of the dowel bar sequentially passes through the upper disc and the dowel bar protective sleeve and then penetrates into the through hole on the pressure disc to be welded and fixed, and the bottom of the dowel bar penetrates into the through hole on the slag discharge disc to be welded and fixed.

Furthermore, a plurality of triangular limiting plates for limiting the movement of the dowel bar are fixedly arranged on the inner wall of the drill cylinder, and the triangular limiting plates are fixedly connected with the lower end face of the upper disc.

Further, the square head reinforcing rib plate comprises a square head of a square tubular structure formed by a plurality of rib plates, outer rib plates which are positioned on the periphery of the square head and fixedly connected with corners of the square head respectively, and L-shaped anchor clamps which are fixed at the top end of the square head and positioned at the corners of the top end of the square head respectively; the bottom ends of the square head and the outer rib plates are fixed on the upper disc, and square openings communicated with the square head are formed in the upper disc.

Further, the inner ring of the pressure plate is provided with a plurality of circular arc-shaped notches matched with the L-shaped anchor clamps.

Further, a plurality of openings are circumferentially arranged on the outer side wall of the drill cylinder.

Further, wear-resisting strips with a plurality of arc structures are circumferentially arranged on the outer side wall of the drilling barrel, and the wear-resisting strips are distributed in an up-down equidistant mode.

Compared with the prior art, the utility model has the beneficial technical effects that:

according to the mute coring bit, through the installation of the conical head, the large rock block clamped by the lower ring bit in the rotary digging process is broken and loosened, so that the rock block is prevented from being pushed out, and the rock block is smoothly pushed out of the cylinder. In a word, the mute core drill bit has high practicability and high slag discharging efficiency.

Drawings

The utility model is further described with reference to the following description of the drawings.

FIG. 1 is a schematic view of a silent coring bit of the present utility model;

FIG. 2 is an exploded view of a silent coring bit of the present utility model;

FIG. 3 is a schematic view of the structure of the top plate assembly of the silent coring bit of the present utility model;

FIG. 4 is a schematic view of a cone head structure;

reference numerals illustrate: 1. drilling a cylinder; 2. wear strips; 3. a lower ring tooth head; 4. a slag discharge tray; 5. a dowel bar; 6. a pressure plate; 7. an opening; 8. a top plate; 9. square head reinforcing rib plate; 10. a dowel bar protective sleeve; 11. triangular limiting plates; 12. a conical head;

61. circular arc-shaped notch;

91. a square head; 92. an outer rib plate; 93. an L-shaped hoop;

1201. a triangle; 1202. a blade part.

Detailed Description

As shown in fig. 1-4, a silent coring bit comprises a drill barrel 1, wherein a square head upper disc assembly is arranged at the top of the drill barrel 1, a slag discharge disc 4 is arranged at the bottom of the drill barrel, the square head upper disc assembly and the slag discharge disc 4 are fixedly connected together through a plurality of dowel bars 5 positioned in the drill barrel 1, and a pressure disc 6 is arranged at the upper end of the square head upper disc assembly. In this embodiment, the specific number of the dowel bars 5 is four.

Specifically, a plurality of conical heads 12 are arranged at the center of the bottom of the slag discharge disc 4, the conical heads 12 comprise a plurality of circumferentially distributed triangular plates 1201, the circumferences of the triangular plates 1201 are distributed into a conical head 12 structure, and the sharp angle is positioned at one side of the inspection disc 4. The outer side wall of the triangle 1201 is provided with a blade 1202, and the triangle is in a blade-shaped structure, so that friction can be reduced, and the rock breaking efficiency can be improved. The number of the conical heads 12 is at least one, and the conical heads 12 can crush and loosen the rock so as to smoothly push the rock out of the drill cylinder 1. In this embodiment, the cone head 12 is mounted at the bottom of the slag discharging tray 4 by welding.

In addition, the cone head 12 may also have a pyramid structure and a cone structure.

The bottom of the slag discharging disc 4 is provided with a lower ring tooth head 3, and the lower ring tooth head 3 can adopt lower ring tooth heads 3 with different structures according to the hardness of different rock layers.

The square head upper disc assembly comprises an upper disc 8 and a square head reinforcing rib plate 9 fixed on the upper end surface of the upper disc 8,

four dowel bar protection sleeves 10 matched with the dowel bars 5 are arranged on the upper end face of the upper disc 8.

The top of dowel bar protective sheath 10 is towards pressure disk 6, dowel bar protective sheath 10 is located square head deep floor 9's periphery, four with dowel bar 5 assorted through-hole are all installed on pressure disk 6 and the sediment dish 4. The top of the dowel bar 5 sequentially passes through the upper disc 8 and the dowel bar protective sleeve 10 and then penetrates into the through hole on the pressure disc 6 to be welded and fixed, and the bottom of the dowel bar 5 penetrates into the through hole on the slag discharge disc 4 to be welded and fixed.

Four triangular limiting plates 11 which limit the movement of the dowel bar 5 are fixedly arranged on the inner wall of the drill cylinder 1, and the triangular limiting plates 11 are fixedly connected with the lower end face of the upper disc 8. The triangular limiting plate 11 limits the force transfer rod 5 to move upwards when the stroke is maximum.

The square head reinforcing rib plate 9 comprises a square head 91 with a square tubular structure formed by four rib plates, an outer rib plate 92 which is positioned on the periphery of the square head 91 and fixedly connected with the corner of the square head 91 respectively, and an L-shaped anchor ear 93 which is fixed at the top end of the square head 91, wherein the L-shaped anchor ear 93 is positioned at the corner of the top end of the square head 91 respectively. The bottom ends of the square head 91 and the outer rib plates 92 are fixed on the upper disc 8, and square openings communicated with the square head 91 are arranged on the upper disc 8.

Four circular arc-shaped notches 61 matched with the L-shaped anchor clamps 93 are arranged on the inner ring of the pressure plate 6, and the L-shaped anchor clamps 93 of the square end reinforcing rib plate 9 conveniently penetrate through the pressure plate 6 when the pressure plate 6 is pressed down.

Four openings 7 are circumferentially arranged on the outer side wall of the drill cylinder 1 and are used for reducing the pressing resistance and draining water.

The outer side wall of the drill cylinder 1 is circumferentially provided with four wear-resistant strips 2 with arc structures, and the four wear-resistant strips 2 are distributed in an up-down equidistant manner.

The action process of the utility model is as follows:

before drilling, the bottom end of a drill rod sequentially passes through the pressure plate 6, the square head 91 and the upper plate 8 according to the hardness of rock stratum, and then a fixing piece passes through a connecting hole on the square head 91 to be fixed with the drill rod, so that the drill rod is connected with a drill bit; when drilling, the lower ring gear head 3 is driven by the rotation of a drill rod to tunnel, in the process of digging, dregs enter the drill cylinder 1 from the center hole of the lower ring gear head 3 and push the dreg discharging disc 4 to move upwards, and then the pressure plate 6 is driven to move upwards by the dowel bar 5, and meanwhile, larger rocks are broken under the action of the cone head 12, so that the drill cylinder 1 is prevented from being blocked; after the drilling is finished, the drill rod is lifted, a disc on the drill rod extrudes a pressing disc 6, and the pressing disc 6 presses down the slag discharging disc 4 through a dowel bar 5, so that slag in the drill cylinder 1 is rapidly pushed out of the drill cylinder 1 from the center hole of the lower ring gear head 3.

The above embodiments are only illustrative of the preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model, and various modifications and improvements made by those skilled in the art to the technical solutions of the present utility model should fall within the protection scope defined by the claims of the present utility model without departing from the design spirit of the present utility model.

Claims

1. The silent coring bit comprises a drilling barrel (1), wherein a square head upper disc assembly is arranged at the top of the drilling barrel (1), a slag discharge disc (4) is arranged at the bottom of the drilling barrel, a plurality of conical heads (12) are arranged at the central position of the bottom of the slag discharge disc (4), each conical head (12) comprises a plurality of triangular plates (1201) which are circumferentially distributed, and the outer side walls of the triangular plates (1201) are edge parts (1202); the square head upper disc assembly and the slag discharge disc (4) are fixedly connected together through a plurality of dowel bars (5) positioned in the drill cylinder (1), and a pressure plate (6) is arranged at the upper end of the square head upper disc assembly; the method is characterized in that: the bottom of the slag discharging disc (4) is provided with a lower ring tooth head (3).

2. The silent coring bit of claim 1, wherein: the square head upper disc assembly comprises an upper disc (8) and square head reinforcing rib plates (9) fixed on the upper end face of the upper disc (8), and a plurality of dowel bar protection sleeves (10) matched with the dowel bars (5) are arranged on the upper end face of the upper disc (8).

3. The silent coring bit of claim 2, wherein: the top end of the dowel bar protective sleeve (10) faces the pressure plate (6), the dowel bar protective sleeve (10) is positioned on the periphery of the square head reinforcing rib plate (9), and a plurality of through holes matched with the dowel bar (5) are formed in the pressure plate (6) and the slag discharging disc (4); the top of the dowel bar (5) sequentially passes through the upper disc (8) and the dowel bar protective sleeve (10) and then penetrates into the through hole on the pressure disc (6) to be welded and fixed, and the bottom of the dowel bar (5) penetrates into the through hole on the slag discharge disc (4) to be welded and fixed.

4. The silent coring bit of claim 2, wherein: the inner wall of the drill cylinder (1) is fixedly provided with a plurality of triangular limiting plates (11) which limit the movement of the dowel bar (5), and the triangular limiting plates (11) are fixedly connected with the lower end face of the upper disc (8).

5. The silent coring bit of claim 2, wherein: the square head reinforcing rib plate (9) comprises a square head (91) of a square tubular structure formed by a plurality of rib plates, an outer rib plate (92) which is positioned on the periphery of the square head (91) and fixedly connected with the corners of the square head (91) respectively, and L-shaped anchor clamps (93) which are fixed at the top ends of the square head (91), wherein the L-shaped anchor clamps (93) are positioned at the corners of the top ends of the square head (91) respectively; the bottom ends of the square head (91) and the outer rib plates (92) are fixed on the upper disc (8), and square openings communicated with the square head (91) are formed in the upper disc (8).

6. A silent coring bit as set forth in claim 5, wherein: the inner ring of the pressure plate (6) is provided with a plurality of circular arc-shaped notches (61) matched with the L-shaped anchor ear (93).

7. The silent coring bit of claim 1, wherein: a plurality of openings (7) are circumferentially arranged on the outer side wall of the drill cylinder (1).

8. The silent coring bit of claim 1, wherein: the outer side wall of the drill cylinder (1) is circumferentially provided with a plurality of wear-resisting strips (2) with arc structures, and the plurality of wear-resisting strips (2) are distributed at equal intervals up and down.