CN210948498U - Drill bit connecting structure of trenchless pipe-laying drilling machine - Google Patents

Abstract

The utility model discloses a non-excavation pipelaying rig drill bit connection structure relates to non-excavation pipelaying rig field, this non-excavation pipelaying rig drill bit connection structure, including drilling rod and directional drill bit, drilling rod and directional drill bit are linked together, the one end that the drilling rod is close to directional drill bit is provided with screwed joint, screwed joint and drilling rod structure as an organic whole, the directional drill bit inner wall corresponds screwed joint position department and is provided with terminal surface one and terminal surface two, terminal surface one, terminal surface two and directional drill bit homogeneous body shaping, terminal surface one is located screwed joint tip position department. The utility model discloses a set up terminal surface one, terminal surface two, reinforce cover and screw, when having solved current non-excavation pipe laying rig and having passed through directional drill bit preliminary drilling, the rock layer that meets easily, impact force and resistance to directional drill bit are all great, and when directional drill bit passed through helicitic texture and the drill pipe connection, lack the problem of the safeguard measure of strengthening helicitic texture position department stability and intensity.

Description

Drill bit connecting structure of trenchless pipe-laying drilling machine

Technical Field

The utility model relates to a non-excavation pipelaying rig technical field specifically is a non-excavation pipelaying rig drill bit connection structure.

Background

The trenchless pipe-laying drilling machine is equipment for laying pipes underground, a driving shaft of the trenchless pipe-laying drilling machine is connected with a drill pipe through threads, a first drill pipe is connected with a directional drill bit through threads, the directional drill bit extends into the underground, the drill pipe is added through the driving shaft and extends to drive the drill pipe to extend on the ground and drive the directional drill bit to drill along the extension direction of the drill pipe, the trenchless pipe-laying drilling machine sprays water from a spray hole of the directional drill bit through the driving shaft to the drill pipe to form a concrete structure, drilling is more convenient, hole expanding is carried out through a hole expanding drill bit after primary drilling is finished, and then the underground pipe is laid along the hole expanding direction.

However, when the existing trenchless pipe-laying drilling machine initially drills through the directional drill bit, the rock layer is easy to be encountered, impact force and resistance to the directional drill bit are large, when the directional drill bit is connected with the drill pipe through the threaded structure, a protection measure for enhancing stability and strength of the position of the threaded structure is lacked, so that the threaded structure is easy to be damaged, the service life is prolonged, and in order to improve stability and enhance structural strength of the position of the threaded connection, the trenchless pipe-laying drilling machine drill bit connecting structure is provided.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

Not enough to prior art, the utility model provides a non-excavation pipelaying rig drill bit connection structure has solved when current non-excavation pipelaying rig passes through directional drill bit primary drilling, meets the rock layer easily, and is all great to directional drill bit's impact force and resistance, and when directional drill bit passed through helicitic texture and the drill pipe connection, lacks the problem of the safeguard measure of reinforcing helicitic texture position department stability and intensity.

(II) technical scheme

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a non-excavation pipelaying rig drill bit connection structure, includes drilling rod and directional drill bit, drilling rod and directional drill bit are linked together, the one end that the drilling rod is close to directional drill bit is provided with threaded joint, threaded joint and drilling rod structure as an organic whole, the directional drill bit inner wall corresponds threaded joint position department and is provided with terminal surface one and terminal surface two, terminal surface one, terminal surface two and the homogeneous shaping of directional drill bit, the terminal surface is located threaded joint end position department, two drilling rod end position departments of terminal surface, directional drill bit surface activity has cup jointed the reinforcement cover, the reinforcement cover passes through screw and directional drill bit locking, the tip of screw runs through reinforcement cover and directional drill bit and presss from both sides tightly the surface at the drilling rod.

Preferably, the number of the screws is at least two, and the screws are vertically screwed in the inner part of the pilot bit.

Preferably, the first end face and the second end face are both annular planes, and the first end face and the second end face are both formed by a convex inner cavity of the directional drill bit.

(III) advantageous effects

The utility model provides a non-excavation pipe laying rig drill bit connection structure possesses following beneficial effect:

the utility model has the advantages that the utility model is provided with the first end face, the second end face, the reinforcing sleeve and the screw, the directional drill bit is subjected to the right impact force and resistance when drilling in a left-handed rotation direction, and is subjected to the impact force and resistance in a rotation direction, the right impact force and resistance of the directional drill bit are resisted through the first end face and the second end face, the impact of the horizontal force on the threaded structure on the surface of the threaded joint is lightened, the protective effect is achieved, the drill rod is clamped through the screw, the shaking between the rotary rod and the directional drill bit is reduced, the friction force for connecting the drill rod and the directional drill bit is increased, the connection strength of the structure is enhanced, the connection stability of the drill rod and the directional drill bit is improved, the purpose of ensuring the stable connection of the threaded structure is achieved, the problem that when the existing non-excavation pipe-laying drilling machine initially drills, when the directional drill bit is connected with the drill pipe through the thread structure, the problem of lack of protective measures for strengthening the stability and the strength of the thread structure is solved.

Drawings

Fig. 1 is a front view of the present invention;

FIG. 2 is a front sectional view of the pilot bit of the present invention;

fig. 3 is a schematic view of the structure of the directional drill of the present invention.

In the figure: 1. a drill stem; 2. a pilot bit; 3. a threaded joint; 4. the end face I; 5. a second end face; 6. reinforcing the sleeve; 7. and (4) screws.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1-3, the utility model provides a technical solution: a drill bit connecting structure of a trenchless pipe-laying drilling machine comprises a drill rod 1 and a directional drill bit 2, wherein the rotary power of the drill rod 1 is a driving shaft of the trenchless pipe-laying drilling machine, the driving shaft is in threaded connection with the drill rod 1 through a threaded joint 3, the driving shaft rotates and pushes the drill rod 1 to achieve the purpose of drilling, the directional drill bit 2 drills through a left wedge surface edge, the directional drill bit 2 is provided with a nozzle, the drill rod 1 is tubular, a water source is provided inside the drill rod 1 through the trenchless pipe-laying drilling machine, additives such as slurry, bentonite and the like are contained in the water source and circulate in a drilled hole to play a role of protecting the wall, the drill rod 1 is communicated with the directional drill bit 2, the water source flows out from the nozzle of the directional drill bit 2 during drilling, the drill rod 1 is 3 meters, two adjacent drill rods 1 are connected through the threaded joint 3, one end, close to the, one end of the directional drill bit 2 is an internal thread connector, the threaded connector 3 and the drill rod 1 are of an integral structure, a first end face 4 and a second end face 5 are arranged on the inner wall of the directional drill bit 2 corresponding to the position of the threaded connector 3, the first end face 4, the second end face 5 and the directional drill bit 2 are integrally molded through die casting, the first end face 4 is arranged at the end position of the threaded connector 3, the end position of the drill rod 1 of the second end face 5 is movably sleeved with a reinforcing sleeve 6, the reinforcing sleeve 6 is locked with the directional drill bit 2 through a screw 7, the end part of the screw 7 penetrates through the reinforcing sleeve 6 and the directional drill bit 2 and is clamped on the surface of the drill rod 1, during drilling, the drilling process comprises the processes of drilling, reaming and pipe laying, the directional drill bit 2 of the trenchless pipe laying drilling machine is direction-controllable, the laying pipeline is in an inverted parabola shape under the ground, the principle is that the directional drill bit 2 with the direction controllable direction, the drill rod 1 stops rotating, the wedge surface of the directional drill bit 2 is fixed at a corresponding position, the drill rod 1 is pushed forwards to change the drilling direction, important data such as the position of the directional drill bit 2, the inclination of the directional drill bit 2 and the ground, the wedge surface angle and the like are transmitted to a receiving instrument on the ground through an electromagnetic detecting instrument to be controlled, the wedge-shaped directional drill bit 2 reaching a target point is changed into a conical hole expanding drill bit, the drill hole is expanded to a required diameter when the drill rod 1 is pulled back, generally, hole expanding needs to be carried out for several times, and meanwhile, an underground pipeline is brought into a pre-designed traveling route to drill a reverse parabola from an earth outlet point.

As a technical optimization scheme of the utility model, the quantity of screw 7 is two sets of at least, and the perpendicular threaded connection of screw 7 is in the inside of directional drill 2.

As a technical optimization scheme of the utility model, terminal surface one 4 and two 5 all are the annular plane of terminal surface, and terminal surface one 4 and two 5 convex inner chambers that all pass through directional drill 2 form with the terminal surface.

When the drill rod is used, the reinforcing sleeve 6 is sleeved on the surface of the end part of the directional drill bit 2 along the right end of the directional drill bit, a screw 7 positioning hole of the reinforcing sleeve 6 corresponds to a screw 7 positioning hole of the drill rod 1, the reinforcing sleeve 6 can be tightly sleeved on the right end of the directional drill bit 2 in inner diameter matching mode, the directional drill bit 2 is screwed on the surface of the threaded connector 3 in a threaded mode, the threaded connector 3 is abutted to the position 4 of the end face, the left end of the drill rod 1 is abutted to the position 5 of the end face, the screw 7 is installed again, after the screw 7 is screwed down, the screw 7 is locked on the surface of the drill rod 1, connection of the directional drill bit 2 and the drill rod 1 is completed.

To sum up can, the utility model discloses a set up terminal surface one 4, terminal surface two 5, reinforcement cover 6 and screw 7, when having solved current non-excavation pipe laying rig and having passed through the preliminary drilling of directional drill bit 2, easily meet the rock layer, impact force and resistance to directional drill bit 2 are all great, and when directional drill bit 2 passed through helicitic texture and drill pipe connection, lack the problem of the safeguard measure of enhancement helicitic texture position department stability and intensity.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (3)

1. The utility model provides a non-excavation pipelaying rig drill bit connection structure, includes drilling rod (1) and directional drill bit (2), drilling rod (1) and directional drill bit (2) are linked together, its characterized in that: the drill rod (1) is close to one end of the directional drill bit (2) and is provided with a threaded joint (3), the threaded joint (3) and the drill rod (1) are of an integral structure, a first end face (4) and a second end face (5) are arranged at the position, corresponding to the threaded joint (3), of the inner wall of the directional drill bit (2), the first end face (4), the second end face (5) and the directional drill bit (2) are integrally formed, the first end face (4) is located at the end position of the threaded joint (3), the second end face (5) is located at the end position of the drill rod (1), a reinforcing sleeve (6) is movably sleeved on the surface of the directional drill bit (2), the reinforcing sleeve (6) is locked with the directional drill bit (2) through a screw (7), and the end portion of the screw (7) penetrates through the reinforcing sleeve (6) and the directional drill bit (2) and is clamped on the surface.

2. The trenchless pipelaying drill bit-connecting structure of claim 1, wherein: the number of the screws (7) is at least two, and the screws (7) are vertically screwed in the directional drill bit (2).

3. The trenchless pipelaying drill bit-connecting structure of claim 1, wherein: the first end face (4) and the second end face (5) are both annular planes, and the first end face (4) and the second end face (5) are both formed by a convex inner cavity of the directional drill bit (2).

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