CN215443973U - Power device for screwing and unscrewing drill rod - Google Patents

Abstract

The utility model belongs to the field of drilling equipment, and particularly relates to a power device for screwing and unscrewing a drill rod. This a power device for unscrewing drilling rod includes gearbox assembly, main shaft, elevator and two at least driving pieces, and the one end and the gearbox assembly of main shaft are connected, and the other end and the elevator of main shaft are connected, and the driving piece passes through gearbox assembly drive main shaft and rotates, and the elevator is used for with the drilling rod joint. Therefore, the power device can realize the processes of lifting, unscrewing, forward and reverse screwing and the like of the drill rod, the manual screwing and unscrewing are not needed, the labor intensity and time of workers are reduced, and the operation efficiency is improved.

Description

Power device for screwing and unscrewing drill rod

Technical Field

The utility model belongs to the field of drilling equipment, and particularly relates to a power device for screwing and unscrewing a drill rod.

Background

The power head type drilling machine plays an important role in geological drilling, engineering exploration and shallow water well construction, and the tripping operation in the construction process occupies most of the time of the whole construction, so that the tripping efficiency directly influences the economical efficiency of the construction.

In the prior art, the power head drilling machine mostly adopts modes of combining winch lifting with manual screwing-off, or combining winch lifting with twisting-off of a pipe twisting machine, manual hooking and the like, but the manual operation cannot be avoided, and the operation efficiency is difficult to improve due to a large amount of operations with high repeatability and high labor intensity. Meanwhile, automatic equipment such as a pipe twisting machine and the like can improve the twisting and unscrewing efficiency to a certain extent, but the requirements on the operation space and the overall operation of the equipment are high, and the operation requirements of most drilling machines are difficult to meet.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

In view of the above disadvantages and shortcomings of the prior art, the power device for screwing and unscrewing the drill rod provided by the utility model can realize the processes of lifting, unscrewing, forward and reverse screwing and the like of the drill rod, does not need manual screwing and unscrewing, reduces the intensity and time of manual labor, and improves the operation efficiency.

(II) technical scheme

In order to achieve the purpose, the utility model adopts the main technical scheme that:

the utility model provides a power device for screwing and unscrewing a drill rod, which comprises a gearbox assembly, a main shaft, an elevator and at least two driving pieces, wherein the gearbox assembly is arranged on the main shaft; one end of the main shaft is connected with the gearbox assembly, the other end of the main shaft is connected with the elevator, and the driving piece drives the main shaft to rotate through the gearbox assembly; the elevator is used for clamping the drill rod.

Preferably, the gearbox assembly comprises a box body, two input gears and one output gear, wherein the two input gears and the output gear are arranged in the box body, the input gears are meshed with the output gear, the two input gears and the output gear are arranged in a V shape, and the output gear is arranged in the middle; the hydraulic driving device is provided with two driving parts, the driving parts are hydraulic motors, the two hydraulic motors respectively drive the two input gears to rotate, and the output ends of the hydraulic motors are connected with the input gears through spline shafts; the main shaft is fixedly connected in the central hole of the output gear.

Preferably, the gearbox assembly further comprises an upper slew bearing and a lower slew bearing; the upper slewing bearing and the lower slewing bearing are respectively arranged at the upper end and the lower end of the input gear.

Preferably, the gearbox assembly further comprises a bearing lower end cover, wherein the bearing lower end cover covers the bottom end of the box body and corresponds to the lower side of the input gear; a hydraulic plug is arranged on the lower end cover of the bearing.

Preferably, the gearbox assembly further comprises an upper support bearing, a lower support bearing and a main shaft slew bearing; the upper supporting bearing and the lower supporting bearing are respectively arranged at the upper end and the lower end of the output gear, the main shaft slewing bearing is arranged at the bottom end of the lower supporting bearing, and a bearing push ring is arranged between the main shaft slewing bearing and the lower supporting bearing.

Preferably, the gearbox assembly further comprises a bearing upper end cover, wherein the bearing upper end cover covers the top end of the box body and corresponds to the upper side of the output gear; the upper end cover and the lower end cover of the bearing are respectively abutted with the upper support bearing; the lower spindle cover is sleeved on the spindle and covers the box body.

Preferably, the main shaft is connected with the elevator through a conversion joint; and a check disc component is arranged at the joint of the main shaft and the adapter.

Preferably, the lockdisc assembly comprises an upper die ring and a lower die ring; the upper die plate ring is arranged on the adapter, the lower die plate ring is arranged on the main shaft, and the upper die plate ring and the lower die plate ring are buckled through the connection of the flange plates respectively arranged on the upper die plate ring and the lower die plate ring.

Preferably, the elevator comprises a support frame, a rotating member and a plug member; an accommodating cavity is formed in the supporting frame, the rotating piece is arranged in the accommodating cavity, and the rotating piece rotates along the horizontal center line; one end of the drill rod extends into the rotating piece and is clamped with the rotating piece through the plug connector.

Preferably, the main shaft is connected with the inner wall of the central hole of the output gear through a flat key.

(III) advantageous effects

The utility model has the beneficial effects that:

the power device for screwing and unscrewing the drill rod, provided by the utility model, has a reasonable structure, can firmly lock the drill rod, is convenient for the installation of the drill rod by arranging the elevator, improves the operation safety, simplifies the operation flow of adding and screwing and unscrewing the drill rod, can quickly screw and unscrew the drill rod, reduces the labor intensity of workers, and improves the efficiency of drilling operation.

Drawings

FIG. 1 is a schematic diagram of the power unit for unscrewing the drill rods of the present invention;

FIG. 2 is an exploded schematic view of FIG. 1 (showing only the major components);

FIG. 3 is a top view of the gearbox assembly of FIG. 2;

FIG. 4 is a schematic cross-sectional view taken along line A-A of FIG. 3;

FIG. 5 is a cross-sectional view of the check disc assembly of FIG. 2;

FIG. 6 is a schematic view of a power unit for unscrewing a drill rod mounted on a drilling rig.

[ description of reference ]

1: a drive member; 2: mounting screws; 3: a box body; 4: a main shaft; 5: a lockplate assembly;

501: an upper die ring; 502: lower plate tooth ring; 503: a flange plate; 6: a crossover sub;

7: an elevator; 701: a support frame; 702: a rotating member; 703: a plug-in unit; 8: a drill stem;

9: a flat bond; 10: an output gear; 11: a retainer ring; 12: an upper slew bearing;

13: an input gear; 14: an upper end cover of the bearing; 15: a lower slew bearing; 16: a seal ring;

17: sealing the adjusting pad; 18: a lower bearing cap; 19: installing a bolt; 20: a hydraulic plug;

21: a lower support bearing; 22: a bearing push ring; 23: a main shaft slewing bearing;

24: a lower cover of the main shaft; 25: installing a bolt; 26: a lower shaft seal of the box body; 27: shaft sealing is carried out on the box body;

28: the lower cover of the main shaft seals the adjusting pad; 29: a main shaft lower cover sealing ring; 30: an upper support bearing;

31: bearing compression rings; 32: a retainer ring; 33: a sealing ring of the upper end cover of the main shaft;

34: the upper end cover of the main shaft seals the adjusting pad.

Detailed Description

In order to better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the utility model are shown in the drawings, it should be understood that the utility model can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the utility model to those skilled in the art.

As shown in fig. 1-2, the present embodiment provides a power unit for unscrewing a drill rod 8, which comprises a gearbox assembly, a main shaft 4, an elevator 7 and at least two driving members 1. One end and the gearbox subassembly of main shaft 4 are connected, and the other end and the elevator 7 of main shaft 4 are connected, and driving piece 1 passes through gearbox subassembly drive main shaft 4 and rotates, and elevator 7 is used for with 8 joint of drilling rod. In the present embodiment, the drive 1 is a hydraulic motor.

The power device for unscrewing the drill rod 8, which is provided by the embodiment, has the advantages that the structure is reasonable, the drill rod 8 can be firmly locked, the installation of the drill rod 8 is facilitated by arranging the elevator 7, the operation safety is improved, the operation flow of connecting and unscrewing the drill rod 8 is simplified, the drill rod 8 can be rapidly unscrewed, the labor intensity of workers is reduced, and the efficiency of drilling operation is improved.

As shown in fig. 3-4, the gear box assembly comprises a box body 3, two input gears 13 and one output gear 10 which are arranged in the box body 3, wherein the input gears 13 are meshed with the output gear 10, the two input gears 13 and the output gear 10 are arranged in a V shape, and the output gear 10 is arranged in the middle, so that the gear box assembly is small in size, and the power device can be conveniently installed on the drilling machine on the premise of meeting the sufficient torque. The hydraulic motor is connected with the box body 3 through the mounting screw 2, the two hydraulic motors are arranged to drive the two input gears 13 to rotate respectively, the output ends of the hydraulic motors are connected with the input gears 13 through spline shafts, and the main shaft 4 is connected with the inner wall of a central hole of the output gear 10 through the flat key 9.

In the embodiment, two hydraulic motors are arranged, so that two control modes of series connection and parallel connection of the two hydraulic motors with the same fixed quantity can be realized through hydraulic principle control.

When the two hydraulic motors are connected in series, the hydraulic oil passes through the oil inlet of the first hydraulic motor, the oil outlet of the first hydraulic motor, the oil inlet of the second hydraulic motor and the oil outlet of the second hydraulic motor in sequence, each hydraulic motor has the maximum flow at the moment, the pressure difference is half of the maximum pressure difference, the torque output by a single hydraulic motor is the minimum at the moment, the rotating speed is the maximum, namely the torque superposition of the two hydraulic motors is the final torque of the input gear 13, the torque output by the corresponding main shaft 4 is the minimum, and the rotating speed is the maximum, namely the high-rotating-speed small torque.

When the two hydraulic motors are connected in parallel, hydraulic oil enters from the oil inlets of the two hydraulic motors and flows out of the oil outlets of the two hydraulic motors at the same time, each hydraulic motor is half of the maximum flow, the pressure difference is the maximum, the torque output by the single hydraulic motor is the maximum, the rotating speed is the minimum, the torque output by the corresponding main shaft 4 is the maximum, and the rotating speed is the minimum, namely the low-rotating-speed large torque.

Through the control of the two hydraulic modes, the torque capacities of the two power heads, namely the torque of the main shaft 4, can be obtained, the drilling capacity of the drilling machine can be controlled according to different stratum conditions during drilling, the rotating speed can be low and the torque can be large during hard stratum, and the rotating speed can be high and the torque can be small during soft stratum.

If only one quantitative hydraulic motor, namely the gearbox, one input gear 13 and one output gear 10 are arranged, only one rotating speed and torque can be controlled, if the control of a plurality of rotating speeds and torques is to be realized, the gearbox needs to be changed into a complex structure, namely the gears in the gearbox are subjected to multi-stage gear control, the output of different rotating speed ratios is realized, the number of the gears is increased, and the shape of the gearbox is enlarged. If two quantitative gears are realized by the variable-speed hydraulic motor, the corresponding overall hydraulic structure is more complex, and more precise hydraulic parts need to be matched, so that the overall drilling machine is higher in cost and difficult to maintain.

In the practical application process, in order to realize more different torque combinations, more than two quantitative hydraulic motors can be arranged and designed according to the capacity of the drilling machine. In this embodiment, set up two hydraulic motor and also can make to reach left right balance in the whole unit head weight, and reduced the outward appearance structure of gear box subassembly, be convenient for install and use.

As shown in fig. 4, the transmission assembly further includes an upper slewing bearing 12 and a lower slewing bearing 15, and the upper slewing bearing 12 and the lower slewing bearing 15 are respectively disposed at upper and lower ends of the input gear 13. And a retainer ring 11 is mounted on the housing 3 for upper positioning of an input gear 13.

Specifically, the transmission case assembly further includes a bearing lower end cap covering the bottom end of the case 3 and corresponding to the lower side of the input gear 13, and a lower bearing cap 18 mounted on the case 3 by a mounting bolt 19. Wherein the lower slewing bearing 15 is positioned by adjusting the lower portion of the seal adjusting pad 17, thereby positioning the input gear 13. The sealing ring 16 is sleeved on the outer wall of the lower end cover of the bearing, so that the sealing effect between the lower bearing cover 18 and the box body 3 is realized. A hydraulic plug 20 is provided on the lower end cap of the bearing, and of course, the hydraulic plug 20 itself has a sealing function for draining the lubricant inside the housing 3.

As shown in fig. 4, the gearbox assembly further comprises an upper support bearing 30, a lower support bearing 21 and a main shaft slew bearing 23. The upper support bearing 30 and the lower support bearing 21 are respectively arranged at the upper end and the lower end of the output gear 10, the main shaft rotary bearing 23 is arranged at the bottom end of the lower support bearing 21, and a bearing push ring 22 is arranged between the main shaft rotary bearing 23 and the lower support bearing 21.

The gearbox assembly further comprises a bearing upper end cover 14, a bearing pressing ring 31 and a main shaft lower cover 24, wherein the bearing upper end cover 14 covers the top end of the box body 3 and corresponds to the upper side of the output gear 10. And bearing upper end cover 14 passes through the construction bolt and installs on box 3, and bearing clamping ring 31 cover is established on main shaft 4, and the upper and lower both ends of bearing clamping ring 31 respectively with bearing upper end cover 14 and last support bearing 30 butt. Wherein, the output gear 10 is positioned by adjusting the upper part of the main shaft upper end cover sealing adjusting pad 34, and the lower part of the output gear 10 is positioned by the shoulder of the main shaft 4. The main shaft upper end cover sealing ring 33 is sleeved on the outer side of the main shaft 4 upper end cover to realize the sealing effect between the bearing upper end cover 14 and the box body 3. An upper box shaft seal 27 is arranged between the upper bearing end cover 14 and the main shaft 4 and used for sealing the upper part of the box body 3, and a retainer ring 32 is arranged on the inner side wall of the upper bearing end cover 14 and used for fixing an upper shaft seal 36 of the gear transmission.

The lower spindle cover 24 is sleeved on the spindle 4 and connected with the box body 3 through a mounting bolt 25, and the lower part of the spindle 4 is positioned by adjusting the lower spindle cover to seal the lower adjusting pad 28, so that the output gear 10 is positioned at the lower part. The main shaft lower cover sealing ring 29 is sleeved on the main shaft lower cover 24, so that the sealing performance between the main shaft lower cover 24 and the box body 3 is better. A box lower shaft seal 26 is arranged between the main shaft lower cover 24 and the main shaft 4 and is used for sealing the lower part of the gear transmission case 3.

Preferably, the main shaft 4 is connected with the elevator 7 by means of an adapter 6, wherein the main shaft 4 and the adapter 6 are connected by means of a screw thread. In order to improve the reliability between the main shaft 4 and the adapter 6, a locking disc assembly 5 is arranged at the joint of the main shaft 4 and the adapter 6.

As shown in fig. 5, the anti-loosening disc assembly 5 comprises an upper die ring 501 and a lower die ring 502, wherein the upper die ring 501 is arranged on the adapter 6, the lower die ring 502 is arranged on the main shaft 4, and the upper die ring 501 and the lower die ring 502 are connected through flanges 503 respectively arranged on the upper die ring 501 and the lower die ring 502 to be buckled. The upper die ring 501 and the lower die ring 502 have the same structure, and are internally provided with trapezoidal circular rings with bevel teeth, and the upper die ring 501 and the lower die ring 502 are oppositely arranged. The taper of the inner hole of the flange plate 503 is the same as the outer diameter taper of the dental plate ring, and the upper and lower flange plates 503 are pressed tightly on the taper of the dental plate ring by the mounting bolts.

As shown in fig. 2, the elevator 7 includes a holding frame 701, a rotating member 702, and a plug member 703. Be equipped with in the support frame 701 and hold the chamber, rotate the piece 702 and set up and holding the intracavity, rotate the piece 702 and rotate along horizontal center line, the one end of drilling rod 8 stretches into and rotates piece 702 and pass through plug connector 703 with drilling rod 8 and rotation piece 702 joint.

In the embodiment, the connector is a flat plug, and the lower part of the elevator 7 is connected with the drill rod 8 through the flat plug, so that the drill rod 8 is protected from falling off when the drill rod 8 is lifted. And a shoulder structure for driving the elevator 7 to rotate and preventing the elevator 7 from falling off is arranged at one end of the adapter 6, which is far away from the main shaft 4. Fig. 6 is a schematic structural diagram of the power device for unscrewing the drill rod 8 in the embodiment applied to the drilling machine, and the drilling machine equipped with the power device does not need to be equipped with a main winch and an overlong mast, so that the drilling machine is small in structural size and can be adapted to more occasions.

The power device for unscrewing the drill rod 8 in the embodiment does not need to manually move the drill rod 8, so that the labor intensity is greatly reduced, and the safety performance and the efficiency of drilling are further improved.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium; either as communication within the two elements or as an interactive relationship of the two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, a first feature may be "on" or "under" a second feature, and the first and second features may be in direct contact, or the first and second features may be in indirect contact via an intermediate. Also, a first feature "on," "above," and "over" a second feature may be directly or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lower level than the second feature.

In the description herein, the description of the terms "one embodiment," "some embodiments," "an embodiment," "an example," "a specific example" or "some examples" or the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it should be understood that the above embodiments are illustrative and not restrictive, and that those skilled in the art may make changes, modifications, substitutions and alterations to the above embodiments without departing from the scope of the present invention.

Claims (10)

1. A power device for screwing and unscrewing a drill rod is characterized by comprising a gearbox assembly, a main shaft (4), an elevator (7) and at least two driving pieces (1);

one end of the main shaft (4) is connected with the gearbox assembly, the other end of the main shaft (4) is connected with the elevator (7), and the driving piece (1) drives the main shaft (4) to rotate through the gearbox assembly;

the elevator (7) is used for being clamped with the drill rod (8).

2. The power unit for unscrewing the drill rod as recited in claim 1, wherein:

the gearbox assembly comprises a box body (3), two input gears (13) and an output gear (10), wherein the two input gears (13) and the output gear (10) are arranged in the box body (3), the input gears (13) are meshed with the output gear (10), the two input gears (13) and the output gear (10) are arranged in a V shape, and the output gear (10) is arranged in the middle;

the two driving pieces (1) are arranged, the driving pieces (1) are hydraulic motors, the two hydraulic motors respectively drive the two input gears (13) to rotate, and the output ends of the hydraulic motors are connected with the input gears (13) through spline shafts;

the main shaft (4) is fixedly connected in a central hole of the output gear (10).

3. The power unit for unscrewing the drill rod as recited in claim 2, wherein:

the gearbox assembly further comprises an upper slewing bearing (12) and a lower slewing bearing (15);

the upper rotary bearing (12) and the lower rotary bearing (15) are respectively arranged at the upper end and the lower end of the input gear (13).

4. A power unit for unscrewing a drill rod as claimed in claim 3, wherein:

the gearbox assembly further comprises a bearing lower end cover (18), and the bearing lower end cover (18) covers the bottom end of the box body (3) and corresponds to the lower side of the input gear (13);

and a hydraulic plug (20) is arranged on the lower end cover (18) of the bearing.

5. The power unit for unscrewing the drill rod as recited in claim 2, wherein:

the gearbox assembly further comprises an upper support bearing (30), a lower support bearing (21) and a main shaft slewing bearing (23);

the upper supporting bearing (30) and the lower supporting bearing (21) are respectively arranged at the upper end and the lower end of the output gear (10), the main shaft slewing bearing (23) is arranged at the bottom end of the lower supporting bearing (21), and a bearing push ring (22) is arranged between the main shaft slewing bearing (23) and the lower supporting bearing (21).

6. The power unit for unscrewing the drill rod as recited in claim 5, wherein:

the gearbox assembly further comprises a bearing upper end cover (14), and the bearing upper end cover (14) covers the top end of the box body (3) and corresponds to the upper side of the output gear (10);

the spindle is characterized by further comprising a bearing pressing ring (31), wherein the bearing pressing ring (31) is sleeved on the spindle (4), and the upper end and the lower end of the bearing pressing ring (31) are respectively abutted against the upper end cover (14) of the bearing and the upper supporting bearing (30);

the spindle is characterized by further comprising a spindle lower cover (24), wherein the spindle lower cover (24) is sleeved on the spindle (4) and covers the box body (3).

7. The power unit for unscrewing the drill rods as defined in any one of claims 1 to 6, wherein:

the main shaft (4) is connected with the elevator through a conversion joint (6);

and a check disc component (5) is arranged at the joint of the main shaft (4) and the adapter (6).

8. The power unit for unscrewing the drill rod as recited in claim 7, wherein:

the lockwasher assembly (5) comprises an upper die ring (501) and a lower die ring (502);

the upper die plate ring (501) is arranged on the adapter (6), the lower die plate ring (502) is arranged on the main shaft (4), and the upper die plate ring (501) and the lower die plate ring (502) are buckled through connection of flange plates (503) respectively arranged on the upper die plate ring (501) and the lower die plate ring (502).

9. The power unit for unscrewing the drill rod as recited in claim 8, wherein:

the elevator (7) comprises a support frame (701), a rotating piece (702) and a plug connector (703);

an accommodating cavity is formed in the supporting frame (701), the rotating piece (702) is arranged in the accommodating cavity, and the rotating piece (702) rotates along a horizontal center line;

one end of the drill rod (8) extends into the rotating piece (702) and passes through the plug connector (703) to connect the drill rod (8) with the rotating piece (702).

10. The power unit for unscrewing the drill rod as recited in claim 2, wherein:

the main shaft (4) is connected with the inner wall of a central hole of the output gear (10) through a flat key (9).

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