CN219101217U

CN219101217U - Large-aperture drilling telescopic variable-diameter drill bit

Info

Publication number: CN219101217U
Application number: CN202223120692.2U
Authority: CN
Inventors: 李辉; 王东辉; 叶绍其; 高强; 吴坤学; 刘洛刚
Original assignee: Luoyang Jiujiu Technology Co ltd; 5th Engineering Co Ltd of MBEC
Current assignee: Luoyang Jiujiu Technology Co ltd; 5th Engineering Co Ltd of MBEC
Priority date: 2022-11-24
Filing date: 2022-11-24
Publication date: 2023-05-30
Anticipated expiration: 2032-11-24

Abstract

The utility model relates to the field of hob cutters for shaft construction, in particular to a telescopic reducing drill bit for large-aperture drilling, which comprises a drill bit body, a U-shaped groove baffle, a long pin shaft, a reaming cutter box body, a hydraulic cylinder assembly, a first pin shaft and a second pin shaft.

Description

Large-aperture drilling telescopic variable-diameter drill bit

Technical Field

The utility model relates to the field of hob cutters for shaft construction, in particular to a telescopic reducer drill bit for large-aperture drilling.

Background

The vertical shaft is a well-shaped pipeline with an upright hole wall, is actually a collapse funnel, and is square, strip-shaped or irregular round on the plane outline. The well wall is steep and almost vertical, the shaft is widely applied to water taking, water diversion, ventilation, slag sliding and air supplementing of water conservancy and hydropower engineering, and the shaft construction has the characteristics of small occupied area, less interference to surrounding construction and the like. In the vertical shaft drilling and pore-forming process, the problem that the hammering pile casing cannot reach the expected depth is often encountered due to the fact that the stratum strength gradually becomes large, and the whole construction progress of the vertical shaft is greatly influenced, so that the telescopic reducing drill bit capable of drilling the rock below the pile casing to the diameter slightly smaller than the diameter of the pile casing is hoped to be manufactured on the vertical shaft construction engineering, reaming treatment of the rock layer below the pile casing is realized, and finally the purpose of assisting in hammering the pile casing to the designed depth is realized.

Disclosure of Invention

The utility model aims to provide a telescopic reducing drill bit for large-aperture drilling, which has scientific overall structural design and simpler and more convenient installation composition, and when the telescopic reducing drill bit is used, a rotary joint is not required to be additionally arranged, and the telescopic reducing device is additionally arranged on the basis of a pile hole drill bit, so that the telescopic reducing of a shaft drill bit can be realized, and the reaming treatment of a rock stratum below a pile casing is realized;

in order to achieve the above purpose, the present utility model adopts the following technical scheme:

the utility model provides a large aperture is bored with flexible reducing drill bit, includes, drill bit body, U type groove baffle, long round pin axle, reamer box, hydraulic cylinder closes piece, first round pin axle and second round pin axle, has seted up the mounting groove in the upper portion of drill bit body, installs U type groove baffle in the mounting groove, U type groove baffle and mounting groove weld together admittedly, install long round pin axle on U type groove baffle, long round pin axle links to each other with U type groove baffle is fixed, the upper portion of reamer box install on long round pin axle and articulated with long round pin axle, install first round pin axle on reamer box, install the second round pin axle on U type groove baffle, one side end of hydraulic cylinder closes piece install on first round pin axle and articulated with first round pin axle, the opposite side end of hydraulic cylinder closes piece install on the second round pin axle and articulated with the second round pin axle.

Furthermore, all around department on the drill bit body has all offered the mounting groove, has all welded the U type groove baffle admittedly in the mounting groove.

The reaming cutter box body comprises a pushing box, a U-shaped cutter holder, a matched hob and a hob installation shaft, wherein the upper part of the pushing box is provided with a wear-resistant sleeve, the pushing box is installed on a long pin shaft through the wear-resistant sleeve and hinged with the long pin shaft, the lower side of the pushing box is provided with the U-shaped cutter holder used for being installed with the matched hob, the U-shaped cutter holder and the pushing box are installed together through a fastening bolt, the hob installation shaft is installed in the U-shaped cutter holder, and the matched hob is installed on the hob installation shaft through a hob bearing.

Further, the outer side of the reaming cutter box body is provided with a peripheral protection cutter, and the peripheral protection cutter and the outer side of the reaming cutter box body are fixedly installed into a whole.

Further, the back side of the reamer box body is provided with a tearing tool bit which is fixedly connected with the reamer box body.

The hydraulic cylinder assembly comprises a cylinder body, a cylinder telescopic rod, a first connector and a second connector, wherein the cylinder telescopic rod is installed in the cylinder body, the cylinder body is connected with an external hydraulic pump station through a hydraulic oil pipeline, the first connector is installed at the outer end part of the cylinder telescopic rod and fixedly connected with the cylinder telescopic rod into a whole, the second connector is installed at the bottom of the cylinder body and fixedly connected with the cylinder body, a hinge hole is formed in the first connector and the second connector, the first connector is hinged with a first pin shaft through the hinge hole, and the second connector is hinged with a second pin shaft through the hinge hole.

The beneficial effects of the utility model are as follows: the large-aperture telescopic variable-diameter drill bit has scientific overall structural design, simple and convenient installation, operation and use processes, and has the following technical characteristics and advantages compared with the prior drill bit for large-aperture shaft construction:

1. the large-aperture telescopic reducing drill bit can realize telescopic reducing between two sizes when in use, and can perform reaming operation on rock strata below the pile casing during construction operation so as to assist in hammering the pile casing;

2. the large-aperture telescopic variable-diameter drill bit can realize shaft reaming construction without adding a rotary joint (an oil way rotary accessory), and has a simple overall structure;

3. according to the large-aperture telescopic variable-diameter drill bit, a telescopic variable-diameter device (a reaming cutter box body and a hydraulic oil cylinder assembly) is added on the basis of the original pile hole drill bit, a special drill bit is not required to be redesigned, and the production cost of a shaft drill bit is greatly saved.

Drawings

FIG. 1 is a schematic view of the overall installation structure of a large-aperture telescopic drill bit of the present utility model;

FIG. 2 is a schematic view of the reamer housing in the large bore expansion bit of the present utility model;

FIG. 3 is a schematic diagram II of the reamer housing in the large aperture telescopic drill bit of the present utility model;

FIG. 4 is a schematic view of the hydraulic cylinder assembly in the large bore telescoping drill bit of the present utility model;

the reference numerals in the figures are: 1-bit body, 2-U-shaped groove baffle, 3-long pin, 4-reaming cutter box, 5-hydraulic cylinder assembly, 6-first pin, 7-second pin, 41-pushing box, 42-U-shaped cutter holder, 43-matched hob, 44-hob installation shaft, 45-periphery protection cutter, 46-tearing cutter head, 51-cylinder body, 52-cylinder telescopic link, 53-first connector and 54-second connector.

Detailed Description

In order to make the technical solution of the present utility model better understood by those skilled in the art, the present utility model is further described in detail below with reference to the drawings and the detailed description, and it should be noted that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly or indirectly connected to the other element. When an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element. The terms "left" and "right" used in this specification to denote orientations are each referenced to a particular structure shown in the drawings, and are not to be construed as limiting the structure.

Specific example 1: as shown in an attached figure 1 of the specification of the utility model, the telescopic variable-diameter drill bit for large-aperture drilling mainly comprises a drill bit body 1, a U-shaped groove baffle 2, a long pin shaft 3, a reamer box 4, a hydraulic cylinder assembly 5, a first pin shaft 6 and a second pin shaft 7, wherein an installation groove which is matched with the U-shaped groove baffle 2 is formed in the upper part of the drill bit body 1, the U-shaped groove baffle 2 is installed in the installation groove, the U-shaped groove baffle 2 and the installation groove are fixedly welded together (the installation groove is required to be formed at the periphery of the upper part of the drill bit body 1, the U-shaped groove baffle 2 is fixedly welded in the installation groove), the U-shaped groove baffle 2 is provided with the long pin shaft 3, the long pin shaft 3 is of a cylindrical structure with a smooth outer circle, the long pin shaft 3 is fixedly connected with the U-shaped groove baffle 2, the upper part of the reamer box 4 which directly executes reaming operation is installed on the long pin shaft 3 and hinged with the long pin shaft 3, the first pin shaft 6 is installed on the reamer box 4, the U-shaped groove baffle 2 is fixedly welded with the installation groove is provided with the installation groove, the hydraulic cylinder assembly 7 is hinged with the second pin shaft 5 at the other side of the second pin shaft 5, and the hydraulic cylinder assembly is hinged with the second pin shaft 7 at the other side of the first pin shaft 5.

As shown in fig. 2 and 3 of the specification of the present utility model, a reaming cutter box 4 for performing reaming construction operation on the lower side of a casing comprises a push box 41, a U-shaped cutter seat 42, a matched hob 43 and a hob installation shaft 44, wherein a circular wear-resistant sleeve with a smooth inner wall is machined on the upper part of the push box 41, the inner hole diameter of the wear-resistant sleeve is slightly larger than the outer diameter of a long pin shaft 3, the push box 41 is installed on the long pin shaft 3 through the wear-resistant sleeve and hinged with the long pin shaft 3, the lower side of the push box 41 is provided with the U-shaped cutter seat 42 for installing the matched hob 43, the U-shaped cutter seat 42 and the push box 41 are installed together through fastening bolts, a hob installation shaft 44 matched with the matched hob 43 and directly installed in the U-shaped cutter seat 42 is installed on the hob installation shaft 44 through a hob bearing, simultaneously, a peripheral protection cutter 45 is arranged on the outer side of the cutter box 4, the peripheral protection cutter 45 is fixedly installed on the outer side of the cutter box 4 into a whole, a tearing protection 46 is arranged on the back of the cutter box 4, and the cutter protection 46 is connected with the cutter head protection 46 in a reaming operation in a reaming process of the cutter box 4, and the cutter protection 46 can be used for performing reaming operation in the tearing operation.

As shown in fig. 4 of the specification of the present utility model, a hydraulic cylinder assembly 5 for driving a reamer box 4 to open and retract includes a cylinder body 51, a cylinder expansion link 52, a first connector 53 and a second connector 54, wherein the cylinder expansion link 52 is installed in the cylinder body 51, the cylinder body 51 is connected with an external hydraulic pump station through a hydraulic oil pipeline and is controlled by the external hydraulic pump station, a first connector 53 for installing and hinging with a first pin shaft 6 is installed at an outer end portion of the cylinder expansion link 52 and is fixedly connected with the cylinder expansion link 52 into a whole, a second connector 54 for installing and hinging with a second pin shaft 7 is installed at the bottom of the cylinder body 51 and is fixedly connected with the cylinder body 51, and hinge holes are formed in the first connector 53 and the second connector 54, and when the reamer is installed, the first connector 53 is hinged with the first pin shaft 6 through the hinge holes, and the second connector 54 is hinged with the second pin shaft 7 through the hinge holes.

The utility model provides a telescopic variable diameter drill bit for large-aperture drilling, which is characterized in that a telescopic variable diameter device is added on the basis of a drill bit with the diameter of 6.3 meters, so that the expansion drilling to the diameter of 6.8 meters below a pile casing is finally realized, and rock stratum below the pile casing is subjected to expansion drilling treatment. Specifically, the structure of the utility model adopts a hydraulic power type rotary reaming structure, when reaming is carried out, firstly, a pile hole is drilled to a rock layer below a pile casing, the oil cylinder body 51 in the hydraulic oil cylinder assembly 5 is controlled by an external hydraulic controller to work, at the moment, the oil cylinder telescopic rod 52 extends outwards and drives the U-shaped cutter holder 42 to extend outwards through the first connecting head 53, at the moment, the U-shaped cutter holder 42 drives the matched hob 43 arranged on the U-shaped cutter holder to extend outwards to the outside of the drill bit body 1, under the condition that an oil way is not broken, the drill bit body 1 slowly rotates forward for one circle and reversely for one circle within the allowable range of the length of an oil pipe, after the pile hole is gradually enlarged to a hole with phi of 6.8m, the oil way is disconnected, the oil pipe on the drill bit body 1 is self-locked, the reamer box 4 is retracted under the driving of the hydraulic oil cylinder assembly 5 and bundled together with a drill rod, normal drilling is carried out, and after the pile casing is removed, the next circulation is carried out. In the reaming process, the hydraulic pump station is used for providing hydraulic oil to the oil cylinder, after the oil cylinder is opened, the reamer box 4 is opened in a rotating mode to realize gradual diameter change, and it is pointed out that in the process, the drill bit body 1 alternately performs forward rotation/reverse rotation for not more than one circle, so that the purposes of reaming and rock breaking are realized, if the drill bit continuously runs for more than 1 circle, the oil pipe can be twisted, the oil path can be seriously broken, and after the diameter reaches the expected phi 6.8m, the oil pipe is disconnected, and the diameter is maintained for continuous drilling. The foregoing has shown and described the basic principles, principal features and advantages of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims.

Claims

1. The utility model provides a large aperture is bored with flexible reducing drill bit, its characterized in that, including drill bit body (1), U type groove baffle (2), long round pin axle (3), reamer box (4), hydraulic cylinder closes piece (5), first round pin axle (6) and second round pin axle (7), the mounting groove has been seted up on the upper portion of drill bit body (1), installs U type groove baffle (2) in the mounting groove, U type groove baffle (2) and mounting groove solid welded together, install long round pin axle (3) on U type groove baffle (2), long round pin axle (3) link to each other with U type groove baffle (2) is fixed, the upper portion of reamer box (4) install on long round pin axle (3) and with long round pin axle (3) articulated, install first round pin axle (6) on reamer box (4), install second round pin axle (7) on U type groove baffle (2), one side end of hydraulic cylinder closes piece (5) install on first round pin axle (6) and with first round pin axle (6) articulated, the other side of hydraulic cylinder (5) is articulated with second round pin axle (7) and install.

2. The telescopic drill bit for large-aperture drilling according to claim 1, further characterized in that mounting grooves are formed in the periphery of the upper part of the drill bit body (1), and U-shaped groove baffles (2) are fixedly welded in the mounting grooves.

3. The telescopic reducing drill bit for large-aperture drilling according to claim 2, wherein the reamer box body (4) comprises a push box (41), a U-shaped cutter seat (42), a matched hob (43) and a hob installation shaft (44), a wear-resistant sleeve is installed on the upper portion of the push box (41), the push box (41) is installed on the long pin shaft (3) through the wear-resistant sleeve and hinged with the long pin shaft (3), a U-shaped cutter seat (42) for installing the matched hob (43) is installed on the lower side of the push box (41), the U-shaped cutter seat (42) and the push box (41) are installed together through fastening bolts, the hob installation shaft (44) is installed in the U-shaped cutter seat (42), and the matched hob (43) is installed on the hob installation shaft (44) through a hob bearing.

4. A telescopic drill bit for large-bore drilling according to claim 3, further characterized in that a peripheral protection blade (45) is provided on the outer side of the reamer housing (4), said peripheral protection blade (45) being fixedly mounted integrally with the outer side of the reamer housing (4).

5. A telescopic drill bit for large-bore drilling according to claim 3, further characterized in that a tearing cutter head (46) is mounted on the back surface of the reamer box (4), and the tearing cutter head (46) is fixedly connected with the reamer box (4).

6. The telescopic drill bit for large-aperture drilling according to claim 1, wherein the hydraulic cylinder assembly (5) comprises a cylinder body (51), a cylinder telescopic rod (52), a first connector (53) and a second connector (54), the cylinder telescopic rod (52) is installed in the cylinder body (51), the cylinder body (51) is connected with an external hydraulic pump station through a hydraulic oil pipeline, the first connector (53) is installed at the outer end part of the cylinder telescopic rod (52) and is fixedly connected with the cylinder telescopic rod (52) into a whole, the second connector (54) is installed at the bottom of the cylinder body (51) and is fixedly connected with the cylinder body (51), hinge holes are formed in the first connector (53) and the second connector (54), the first connector (53) is hinged with the first pin shaft (6) through the hinge holes, and the second connector (54) is hinged with the second pin shaft (7) through the hinge holes.