CN209959166U - Non-excavation directional drilling machine power device - Google Patents

Abstract

The utility model discloses a power device for a trenchless directional drilling rig, which relates to the technical field of drilling rigs. It includes a driving member and a secondary gear driven by the driving member to rotate; the main shaft is provided with a main gear that rotates coaxially with the main shaft, and the main gear meshes with the secondary gear; the inner side of the main gear is provided with internal splines, and the main shaft is provided with a An external spline matched with an internal spline, and the length of the internal spline is greater than the length of the internal spline. The utility model has the effect of reducing the stress generated by the drill rod during shattering, thereby reducing damage to the main shaft and the drill rod.

Description

Trenchless directional drilling rig power unit

technical field

The utility model relates to the technical field of drilling rigs, in particular to a power device for a trenchless directional drilling rig.

Background technique

The trenchless horizontal directional drilling rig uses directional drill pipe to carry out underground construction under the condition of excavating a very small part of the ground. This construction equipment will not hinder traffic, damage green space and vegetation, and will not affect shops and hospitals. , the normal life and work order of schools and residents, and solved the interference of traditional excavation construction on residents' lives.

The power device of the traditional trenchless horizontal directional drill is that the motor drives the driving shaft to rotate, the driving shaft drives the power rod to rotate through the gear, and the power rod is connected with the drill rod, thereby driving the drill rod to rotate. When the length (or depth) of the drill hole is long, multiple drill rods need to be spliced together for use. In order to ensure the connection strength between the drill rods, the drill rods are connected by threads. When the drilling is completed and the drill pipe is taken out, the drill pipe needs to be shackled. Since the drill pipes are threadedly connected, the length between the drill pipes will increase during the shattering process. The friction force between the drill pipe and the ground that has been drilled into the ground is relatively large, and it is not easy to slide.

Utility model content

In view of the deficiencies in the prior art, the purpose of the present invention is to provide a power device for a trenchless horizontal directional drilling rig. By adding splines on the main shaft connected with the drill pipe, the stress generated by the drill pipe during shattering can be reduced. , thereby reducing damage to the spindle and drill pipe.

In order to achieve the above purpose, the present utility model provides the following technical solution: a power device for a trenchless directional drilling rig, comprising a casing, a drive assembly arranged on the casing, and a main shaft driven to rotate by the drive assembly, and the drive assembly includes A driving member and a secondary gear driven by the driving member to rotate; the main shaft is provided with a main gear that rotates coaxially with the main shaft, and the main gear meshes with the secondary gear; the inner side of the main gear is provided with an internal spline, and the main shaft is provided with a External splines matched with internal splines, and the length of the internal splines is greater than the length of the internal splines.

By adopting the above technical solution, the distance between the two threaded drill rods increases when the buckle is unfastened, the friction force between the drill rod that has been drilled into the ground and the ground is relatively large, and it is difficult to slide, and the drill rod connected to the main shaft is easy to slide. Therefore, the main shaft is driven to slide in the direction close to the motor, and the inner spline and the outer spline slide with each other while rotating, providing a buffer stroke for the movement of the main shaft, thereby reducing damage to the main shaft.

The utility model is further configured as follows: a fixed block is fixed on the inner wall of the main gear, the inner spline is fixed on the fixed block, and radial bearings are arranged on both sides of the fixed block; The inner wall of the casing and the fixing block abut.

By adopting the above technical solution, the radial bearings limit the positions on both sides of the main gear, prevent the main gear from shifting during rotation, and increase the sliding stability of the main gear.

The utility model is further provided as follows: a convex block is fixed on the main shaft, the external spline is arranged on the convex block, and the convex block can abut with the radial bearing.

By adopting the above technical solution, the sliding of the main shaft is limited by the bump and the radial bearing, and the maximum sliding length of the main shaft is the distance between the two radial bearings, so as to prevent the occurrence of misalignment of the inner and outer splines due to excessive sliding of the main shaft. Increase the stability of the spindle sliding.

The utility model is further provided as follows: the number of the driving components is multiple.

By adopting the above technical solution, the multiple drive assemblies can increase the output power of the main shaft, thereby increasing the rotation effect of the main shaft.

The utility model is further configured as follows: a short joint is threadedly connected at one end of the main shaft and the drill pipe.

By adopting the above technical solution, the short joints play a transitional connection role for different types of drill pipes required for drilling different holes, and it is convenient to connect different types of drill pipes by replacing the short joints.

The utility model is further provided as follows: grooves are arranged on both sides of the casing.

By adopting the above technical solution, the groove facilitates the handling of the casing and facilitates the installation and disassembly of the power device.

The utility model is further provided that: the bottom end of the casing is fixed with a positioning block.

By adopting the above technical solution, the positioning block is matched with the reserved groove on the drilling rig, so that the casing can be installed at the same position every time, and the stability of the casing installation is increased.

To sum up, the beneficial technical effects of the present invention are:

1. When shattering, the distance between the two threaded drill pipes increases, the friction force between the drill pipe that has been drilled into the ground and the ground is large, and it is not easy to slide, and the drill pipe connected to the main shaft is easy to slide, thereby driving the main shaft. Sliding in the direction close to the motor, the inner spline and the outer spline slide with each other while rotating, providing a buffer stroke for the movement of the main shaft, thereby reducing damage to the main shaft;

2. The sliding of the main shaft is limited by the bump and the radial bearing. The maximum sliding length of the main shaft is the distance between the two radial bearings, which prevents the internal and external splines from being staggered due to excessive sliding of the main shaft, and increases the sliding speed of the main shaft. stability;

3. Due to the different types of drill pipes required for drilling different holes, the short joints play a transitional connection role, and it is convenient to connect different types of drill pipes by replacing the short joints.

Description of drawings

1 is a schematic diagram of the overall structure of Embodiment 1;

2 is a cross-sectional view of the first embodiment;

Fig. 3 is the enlarged view of A part of Fig. 1;

Figure 4 is a schematic diagram embodying the drive assembly;

5 is a schematic diagram showing the cooperation of the main shaft and the main gear;

FIG. 6 is a solid diagram of the overall structure of the second embodiment.

In the figure: 1. Housing; 11. Inspection port; 12. Groove; 13. Positioning block; 2. Drive assembly; 21. Motor; 22. Shaft; 23. Coupling; 24. Secondary gear; 25. Bearing ;3, main shaft; 31, main gear; 311, fixed block; 312, internal spline; 32, radial bearing; 33, bump; 331, external spline;

Detailed ways

The present utility model will be described in further detail below in conjunction with the accompanying drawings.

Embodiment 1: A power device of a trenchless directional drilling rig, referring to FIG. 1 and FIG. 2 , includes a casing 1 , a drive assembly 2 disposed on the casing 1 , and a main shaft 3 driven and rotated by the drive assembly 2 . The drill rod is connected to the main shaft 3 and is driven to rotate by the main shaft 3 . The number of the driving components 2 is multiple (4 in the figure), which increases the power of the main shaft 3 to rotate. A main gear 31 is connected to the main shaft 3 , the main gear 31 can rotate coaxially with the main shaft 3 , and the main gear 31 is driven to rotate by the drive assembly 2 .

Referring to FIG. 1 and FIG. 3 , the top of the casing 1 is provided with an inspection port 11 , and both sides of the casing 1 are provided with grooves 12 recessed toward the inside of the casing 1 . Bolts for connection; a positioning block 13 is fixed at the bottom end of the casing 1, and the positioning block 13 is matched with the reserved groove on the drilling rig, so that the casing can be installed in the same position every time.

Referring to FIG. 4 , the drive assembly 2 includes a motor 21 , a rotating shaft 22 driven by the motor 21 to rotate, a coupling 23 connecting the rotating shaft 22 and the motor 21 , a secondary gear 24 fixed on the rotating shaft 22 and rotating coaxially with the rotating shaft 22 , and a fixed The bearing 25 on the side of the rotating shaft 22 close to the housing 1 . The sub gear 24 meshes with the main gear 31 and can transmit the rotation of the motor 21 to the main gear 31 .

2 and 5 , a fixed block 311 is fixed in the middle of the main gear 31 , and radial bearings 32 are provided on both sides of the fixed block 311 . Abut. The interior of the fixed block 311 is provided with an internal spline 312, the main shaft 3 is fixed with a convex block 33, and the convex block 33 is provided with an external spline 331, and the internal spline 312 and the external spline 331 are engaged with each other, so that the main shaft 3 and the The main gears 31 can rotate simultaneously. The length of the internal splines 312 is greater than the length of the external splines 331 , so that after the main shaft 3 slides relative to the main gear 31 in the longitudinal direction of the main shaft 3 , the internal splines 312 and the external splines 331 can continue to mesh. After sliding, the protrusion 33 can abut against the radial bearing 32 and limit the sliding of the main shaft 3 .

Use process: when taking out the drill pipe, the main shaft 3 is in contact with the radial bearing 32 on the side of the principle motor 21 . When shattering, the distance between the two threaded drill rods increases, the friction force between the drill rod that has been drilled into the ground and the ground is large, and it is not easy to slide, and the drill rod connected to the main shaft 3 is easy to slide, thereby driving the main shaft 3 to the ground. Sliding in the direction close to the motor 21 , the inner splines 312 and the outer splines 331 mesh with each other, providing a buffer stroke for the movement of the main shaft 3 , thereby reducing damage to the main shaft 3 .

Embodiment 2: The difference between this embodiment and Embodiment 1 is that one end of the main shaft 3 connected with the drill rod is threadedly connected with a short section 4 , and the drill rod is connected to the main shaft 4 . Due to the different types of drill pipes required for drilling different holes, the short joint 4 serves as a transitional connection, and different types of drill pipes are connected by replacing the short joint 4.

The embodiments of this specific embodiment are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore: all equivalent changes made according to the structure, shape and principle of the present invention should be covered in within the protection scope of the present invention.

Claims (7)

1. The utility model provides a directional rig power device of non-excavation, includes casing (1), sets up drive assembly (2) on casing (1) and drives pivoted main shaft (3) by drive assembly (2), its characterized in that: the driving assembly (2) comprises a driving piece and a pinion (24) driven by the driving piece to rotate; a main gear (31) which rotates coaxially with the main shaft (3) is arranged on the main shaft (3), and the main gear (31) is meshed with the pinion (24); an inner spline (312) is arranged on the inner side of the main gear (31), an outer spline (331) matched with the inner spline (312) is arranged on the main shaft (3), and the length of the inner spline (312) is larger than that of the inner spline (312).

2. The trenchless directional drilling rig power plant of claim 1, wherein: a fixed block (311) is fixed on the inner wall of the main gear (31), the internal spline (312) is fixed on the fixed block (311), and radial bearings (32) are arranged on two sides of the fixed block (311); two ends of the radial bearing (32) are respectively abutted against the inner wall of the shell (1) and the fixed block (311).

3. The trenchless directional drilling rig power plant of claim 2, wherein: a convex block (33) is fixed on the main shaft (3), the external spline (331) is arranged on the convex block (33), and the convex block (33) can be abutted against the radial bearing (32).

4. The trenchless directional drilling rig power plant of claim 1, wherein: the number of the driving assemblies (2) is multiple.

5. The trenchless directional drilling rig power plant of claim 1, wherein: and a short joint (4) is connected to one end of the main shaft (3) connected with the drill rod through threads.

6. The trenchless directional drilling rig power plant of claim 1, wherein: grooves (12) are arranged on two sides of the shell (1).

7. The trenchless directional drilling rig power plant of claim 1, wherein: and a positioning block (13) is fixed at the bottom end of the shell (1).

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