CN214403435U - Drilling guide structure for miniature jacking pipe - Google Patents

Abstract

The utility model provides a drilling guide structure for miniature push pipe, including the pilot bit, the pilot bit includes spliced pole and a body coupling and is in on the spliced pole and with the coaxial arrow head body of arranging of spliced pole, the arrow head body is in projected outer contour line on the radial face of spliced pole is circular, just the arrow head body is kept away from the one end of spliced pole have with the non-perpendicular guide plane of arranging of axis of spliced pole. The guide plane is arranged at one end, far away from the connecting column, of the arrow head body, and replaces a conical surface at the front end of a traditional drill bit, so that the torsion borne by the guide drill bit is relatively small in the deviation rectifying process, and the service life is relatively long.

Description

Drilling guide structure for miniature jacking pipe

Technical Field

The utility model relates to a arrange mud pipeline construction equipment's local structure, especially a drilling guide structure for miniature push pipe.

Background

The construction of traditional underground pipeline usually is to dig whole ground and form the slot, then lays the pipeline in the slot, and occupation place is big and long time, seriously influences normal transportation order. With the development of the micro pipe jacking technology, the traditional underground pipeline construction mode is gradually eliminated.

The micro pipe jacking technology adopts a construction mode that two operation wells are dug at the starting point and the end point of the existing pipeline, then operations such as drilling, reaming, pipeline penetrating and the like are sequentially carried out between the two operation wells, and the laying of the pipeline is realized, for example, the split type spiral pipe jacking machine disclosed in the invention patent application with the publication number of CN106869955A and the construction process thereof and the like. However, in the drill guiding structure adopted for drilling in the current micro pipe jacking technology, the front end of the drill (also called as the guiding head) is usually a conical surface, the inclined guiding surface is arranged at the rear side of the conical surface, the drill itself does not rotate during the drilling process, but forward thrust is applied to the drill by the propelling machine to realize drilling, when the conical surface on the drill touches harder objects such as stones, the drilling direction of the drill is easy to deviate, and deviation correction needs to be realized by rotating the angle of the inclined guiding surface, and during the deviation correction process of the guiding structure, the position between the inclined guiding surface and the conical surface can bear relatively large torsion, so that the service life of the guiding drill is influenced.

In view of the above, the applicant has made intensive studies to solve the above problems and has made the present invention.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a drill bit life is higher relatively is used for drilling guide structure of miniature push pipe.

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

the utility model provides a drilling guide structure for miniature push pipe, includes pilot bit, pilot bit includes spliced pole and a body coupling and is in on the spliced pole and with the arrow body of spliced pole coaxial arrangement, the arrow body is in the outer contour line of the projection on the radial surface of spliced pole is circular, just the arrow body is kept away from the one end of spliced pole have with the non-perpendicular guide plane of arranging of axis of spliced pole.

As an improvement of the present invention, the outer diameter of the arrow head body is larger than the outer diameter of the connecting column.

As an improvement of the utility model, the spliced pole is kept away from the counter bore has been seted up to the one end of arrowhead body, the polygon blind hole has been seted up to the hole bottom of counter bore, the hole has been seted up to the bottom of polygon blind hole.

As an improvement of the utility model, set up on the lateral wall of connecting seat with the perforation of polygon blind hole intercommunication.

As an improvement of the utility model, the lateral wall of the inner hole is provided with a plurality of convex ribs which are arranged in parallel with the axis of the connecting column.

As an improvement of the utility model, still include a plurality of pipe groups that can dismantle the connection in proper order, each pipe group forms after connecting gradually and impels the section, is located impel section one end the one end of pipe group have with polygon blind hole complex connector, the connector alternates to be in the polygon blind hole.

As an improvement of the utility model, the pipe group includes the outer tube and alternates inner tube in the outer tube, adjacent two in the propulsion section screwed connection between the outer tube, adjacent two the inner tube supports each other and pushes up, the connector is located on the inner tube.

Adopt above-mentioned technical scheme, the utility model discloses following beneficial effect has:

1. the guide plane is arranged at one end, far away from the connecting column, of the arrow head body, and replaces a conical surface at the front end of a traditional drill bit, so that the torsion borne by the guide drill bit is relatively small in the deviation rectifying process, and the service life is relatively long.

2. The utility model provides a pilot bit, the pusher is with the forward propulsive in-process of pilot bit during the use, because the existence of guide plane, pilot bit must can squint, the pusher is every to carry out one side and impels, all need rotatory pilot bit in order to change the angle of guide plane, consequently its actual drilling's aperture is far greater than the biggest outline diameter of pilot bit, the hole lateral wall is all relatively less with the friction of pilot bit and pipe group, drilling resistance is also relatively less, the follow-up reaming of being convenient for simultaneously.

Drawings

FIG. 1 is a schematic structural view of a pilot bit according to the present invention;

FIG. 2 is a perspective schematic view of a guide brick of the present invention;

fig. 3 is a schematic structural view of the middle and outer tube of the present invention;

FIG. 4 is a schematic structural view of the inner tube of the present invention;

fig. 5 is a schematic view of the use state of the drilling guide structure of the present invention.

The designations in the figures correspond to the following:

10-a pilot bit; 11-a connecting column;

12-arrow body; 13-counter bore;

14-polygonal blind holes; 15-inner hole;

16-a guide plane; 17-a convex rib;

18-perforating;

20-catheter group; 21-an outer tube;

22-an inner tube; 23-an internally threaded hole;

24-an external thread section; 25-a connector;

26-pin holes; 17-a transmission block.

Detailed Description

The invention will be further described with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1-5, the present embodiment provides a drilling guide structure for a micro jacking pipe, including a guide drill 10, the guide drill 10 includes a connection column 11 and an arrow body 12 integrally connected to one end of the connection column 11 and coaxially arranged with the connection column 11, wherein one end of the connection column 11 far away from the arrow body 12 is provided with a counter bore 13, a polygonal blind hole 14 is provided at the bottom of the counter bore 13, an inner hole 15 is provided at the bottom of the polygonal blind hole 14, in the present embodiment, the polygonal blind hole 14 is a regular hexagonal hole, and a through hole 18 communicated with the polygonal blind hole 14 is provided on the side wall of the connection seat 11, so as to insert a positioning pin or a locking bolt. The outer contour of the projection of the arrow body 12 onto the radial surface of the connecting column 11 is circular, and the end of the arrow body 12 remote from the connecting column 11 has a guide plane 16 arranged non-perpendicularly to the axis of the connecting column 11, i.e. the guide plane 16 is arranged obliquely to the axis of the connecting column 11.

When the drill bit is used, the pusher (which is a pusher adopted in the conventional micro pipe jacking process and can be directly purchased and obtained from the market and does not belong to one part of the drilling guide structure provided by the embodiment) pushes the guide drill bit forwards, the guide drill bit can deviate inevitably due to the existence of the guide plane 16, and the guide drill bit needs to be rotated to change the angle of the guide plane 16 when the pusher pushes one side, so that the actual drilling aperture is far larger than the maximum outer contour diameter of the guide drill bit, the friction between the hole side wall and the guide drill bit as well as the guide pipe group is relatively small, the drilling resistance is relatively small, and the follow-up reaming is facilitated.

Preferably, in the present embodiment, the outer diameter of the arrow head 12 is larger than the outer diameter of the connection post 11, which helps to avoid contact between the connection post 11 and the side wall of the drilled hole, and in addition, the side wall of the inner bore 15 is provided with a plurality of ribs 17 arranged parallel to the axis of the connection post 11 to ensure tight connection with the connector as will be mentioned below.

The drilling guide structure for the micro jacking pipe provided by the embodiment further comprises a plurality of conduit groups 20 which are sequentially detachably connected, wherein each conduit group 20 is sequentially connected to form a propelling section, it should be noted that the number of the conduit groups 20 in the propelling section is not fixed and unchanged, in the propelling process, after the propelling machine performs a propelling action every time, the propelling machine needs to add one conduit group 20 to perform the next propelling action, that is, in the working process, the propelling section is continuously lengthened. The end of the conduit group 20 at the end of the propelling section is provided with a connector which is matched with the polygonal blind hole 14 and is inserted into the polygonal blind hole 14, so that the pilot bit 10 can be driven to rotate when the pilot bit 10 needs to rotate.

Preferably, in this embodiment, the conduit group 20 includes an outer tube 21 and an inner tube 22 inserted into the outer tube 21, two adjacent outer tubes 21 in the pushing section are connected in a spiral manner, two adjacent inner tubes 22 abut against each other, and the connector is located on the inner tube 22, specifically, one end of the outer tube 21 is provided with an internal threaded hole 23, the other end is provided with an external threaded section 24 matched with the internal threaded hole 23, one external threaded section 24 of two adjacent outer tubes 21 is connected in the internal threaded hole 23 of the other outer tube 21 in a spiral manner, and the end of the outer tube 21 matched with the pilot drill 10, which is provided with the internal threaded hole 23, abuts against the end face of the connecting column 11; the end face of one end of the inner tube 22 is provided with a connector 25, the connector 25 of one of the inner tubes 22 of two adjacent inner tubes 22 is inserted into the inner hole of the other inner tube 22, and the connector 25 is fixedly connected with the corresponding inner tube 22 through a bolt, certainly, the side wall of the connector 25 and the side wall of the end of the inner tube 22 far away from the connector 25 are respectively provided with a pin hole 26 which is matched with each other, the end faces of the two adjacent inner tubes 22 are abutted against each other, the connector 25 of the inner tube 22 matched with the guide drill 10 is inserted into the inner hole 15 of the connecting column 11, wherein the periphery of the connector 25 is integrally connected with at least one transmission block 27 matched with the side wall of the polygonal blind hole 14, in addition, the connector 25 and the guide drill 10 are also fixedly connected together through a bolt, and the bolt is inserted into the pin hole and the through hole 18 of the corresponding connector 25. Thus, by rotating the inner tube 22, the pilot bit 10 can be rotated, and the angle of the pilot bit 10 can be adjusted.

The present invention has been described in detail with reference to the accompanying drawings, but the embodiments of the present invention are not limited to the above embodiments, and those skilled in the art can make various modifications to the present invention according to the prior art, and these all belong to the protection scope of the present invention.

Claims (7)

1. The utility model provides a drilling guide structure for miniature push pipe, a serial communication port, including pilot bit, pilot bit includes spliced pole and a body coupling and is in on the spliced pole and with the arrow body of spliced pole coaxial arrangement, the arrow body is in the outer contour line of the projection on the radial surface of spliced pole is circular, just the arrow body is kept away from the one end of spliced pole have with the non-perpendicular guide plane of arranging of axis of spliced pole.

2. The drill guide structure for mini jacking pipes as claimed in claim 1, wherein the outer diameter of said arrowhead body is larger than the outer diameter of said connecting column.

3. The drilling guide structure for the micro jacking pipe as claimed in claim 1 or 2, wherein a counter bore is formed at one end of the connecting column, which is far away from the arrow body, a polygonal blind hole is formed at the bottom of the counter bore, and an inner hole is formed at the bottom of the polygonal blind hole.

4. The drilling guide structure for the micro jacking pipe as claimed in claim 3, wherein the side wall of the connecting column is provided with a through hole communicated with the polygonal blind hole.

5. The drill guide structure for micro jacking pipes according to claim 3, wherein the side wall of the inner hole is provided with a plurality of ribs arranged in parallel with the axis of the connecting column.

6. The drilling guide structure for micro jacking pipes according to claim 3, further comprising a plurality of conduit groups detachably connected in sequence, wherein each conduit group forms a propelling section after being connected in sequence, one end of the conduit group at one end of the propelling section is provided with a connector matched with the polygonal blind hole, and the connector is inserted into the polygonal blind hole.

7. The drill hole guiding structure for micro jacking pipes as claimed in claim 6, wherein said guide pipe set comprises an outer pipe and an inner pipe inserted into said outer pipe, two adjacent outer pipes in said propelling section are connected by screw, two adjacent inner pipes abut against each other, and said connector is located on said inner pipe.

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