WO2016179774A1

WO2016179774A1 - Power head of rotary drilling rig and rotary drilling rig

Info

Publication number: WO2016179774A1
Application number: PCT/CN2015/078648
Authority: WO
Inventors: 张继光; 罗菊; 朱海港; 孙余; 瞿斌; 范强胜
Original assignee: 徐州徐工基础工程机械有限公司
Priority date: 2015-05-11
Filing date: 2015-05-11
Publication date: 2016-11-17
Also published as: EP3272992B1; EP3272992A1; PL3272992T3; EP3272992A4

Abstract

A power head of a rotary drilling rig and a rotary drilling rig. The power head comprises: a drive device (110) and a transmission device. The transmission device comprises an input shaft (136), a first output shaft (132) and a second output shaft (143). The input shaft (136) is in drive connection with the drive device (110). The first output shaft (132) is configured to be in drive connection with a drill rod (200) of a rotary drilling rig. The second output shaft (143) is configured to be in drive connection with a casing drive (300) of the rotary drilling rig. The second output shaft (143) has a first state. Under the first state, when the drive device (110) drives the input shaft (136) to rotate, an output torque of the second output shaft (143) is greater than that of the first output shaft (132). The power head enables the second output shaft (143) to be in the first state when it is necessary to fully bury a casing, and outputs an output torque greater than an output torque during driving of the drill rod (200) so as to drive the casing drive (300), such that a casing can be smoothly buried using own functions of a rotary drilling rig, and high construction efficiency can be achieved.

Description

Power head of rotary drilling rig and rotary drilling rig

Technical field

The invention relates to the field of drilling machinery and equipment, in particular to a power head of a rotary drilling rig and a rotary drilling rig.

Background technique

Rotary drilling rigs have been quickly promoted and applied in construction projects due to their high efficiency, speed, environmental protection, and high quality of hole formation. Rotary drilling rigs are matched with different drilling tools, which can adapt to the construction of soil and soft and hard layers in most areas. The drilling method of rotary drilling rigs generally adopts the wet rotary drilling method with static mud wall protection and the dry rotary drilling method without stabilizing liquid. For regional soft soil, marine silt layer and some special formations, a full set of pipe rotary excavation construction method is required.

The construction of the full-casing rotary drilling method is beneficial to the rotary drilling rig to improve the drilling efficiency and ensure the drilling quality, and the pile body after concrete pouring is not prone to quality problems such as necking, leaking reinforcement, and pile body concrete segregation. As the application of the full-pipe rotary excavation method becomes more and more mature, the full-pipe rotary excavation method has been continuously promoted, especially in some European markets, almost all of the full-pipe rotary excavation method is used for rotary construction. The difference between the full-casing rotary drilling method and the wet rotary drilling method and the dry rotary drilling method is that the protective wall adopts a steel sleeve or a steel sleeve combined with a static mud protective wall, thus improving the adaptability of the rotary drilling rig to the formation. .

Full casing burying is the core content of the full-tube rotary excavation method. There are currently three main methods for burying the full casing, namely, burying with a rotary drilling rig, burying with a pipe rolling machine, and burying with a crawler crane and a vibrating hammer.

Embedding with a rotary drilling rig's own function is to use the output torque of the power head of the rotary drilling rig to control the lifting and lowering of the casing with a pressurized oil cylinder to realize the embedment of a complete set of pipes. The use of rotary drilling rig's own functions to bury a full set of pipes requires less auxiliary equipment and higher construction efficiency. It is currently the most economical and convenient way to bury a full set of pipes.

However, the use of the rotary drilling rig's own functions to bury the casing requires the power head to have sufficient output To Torque. For small rotary drilling rigs and large-aperture drilling, when the output torque of the power head of the rotary drilling rig is used to bury the casing, there are problems such as unsatisfactory construction efficiency, large damage to the equipment, and even failure to drive the casing.

Summary of the invention

The purpose of the present invention is to provide a power head of a rotary drilling rig and a rotary drilling rig. The power head can output a larger output torque than the output torque when driving the drill rod, so that the rotary drilling rig's own functions can be used to smoothly Buried casing, and can achieve higher construction efficiency.

The first aspect of the present invention provides a power head of a rotary drilling rig, including a driving device and a transmission device, the transmission device including an input shaft, a first output shaft, and a second output shaft, the input shaft and the driving device Driving connection, the first output shaft is used for driving connection with the drill rod of the rotary drilling rig, the second output shaft is used for driving connection with the casing driver of the rotary drilling rig, the second output shaft It has a first state. In the first state, when the driving device drives the input shaft to rotate, the output torque of the second output shaft is greater than the output torque of the first output shaft.

Further, the second output shaft also has a second state. In the second state, when the driving device drives the input shaft to rotate, the output torque of the second output shaft is zero.

Further, the transmission device includes a first-stage transmission part and a second-stage transmission part, and the first-stage transmission part includes the input shaft, the first output shaft, and an intermediate output drivingly connected to the input shaft. Shaft, the second-stage transmission portion includes an intermediate input shaft and the second output shaft drivingly connected to the intermediate input shaft, wherein, in the first state, the intermediate input shaft and the intermediate output shaft Connected, in the second state, the intermediate input shaft is disengaged from the intermediate output shaft.

Further, the first-stage transmission part further includes a first gear transmission system for converting the input torque of the input shaft into the output torque of the first output shaft and the output torque of the first output shaft. The output torque of the intermediate output shaft.

Further, the first-stage transmission part further includes a transmission shaft, and the shaft-in shaft passes through the To The first gear transmission system is drivingly connected with the transmission shaft, and the first output shaft and the intermediate output shaft are respectively connected with the transmission shaft.

Further, the first-stage transmission part further includes a first transmission case, the first gear transmission system is located in the first transmission case, the input shaft, the first output shaft, and the intermediate output shaft They respectively extend from the inside of the first transmission box body.

Further, the first gear transmission system includes a first drive gear and a slewing support, the first drive gear is connected to the input shaft, and the slewing support includes an inner ring and an outer ring with external teeth. The ring is fixedly connected with the first transmission box body, and the outer ring is meshed with the first drive gear and connected with the transmission shaft.

Further, the slewing support further includes rolling elements, and the rolling elements are arranged between the inner ring and the outer ring.

Further, the second-stage transmission part further includes a second gear transmission system for converting the input torque of the intermediate input shaft into the output torque of the second output shaft.

Further, the second-stage transmission part further includes a second transmission case, the second gear transmission system is located in the second transmission case, and the intermediate input shaft and the second output shaft are separated from the The inside of the second transmission box body extends.

Further, the second gear transmission system includes a second drive gear, a planetary gear, and a ring gear with internal teeth, the ring gear is sleeved on the outside of the second drive gear and the planet gear, and the planetary gear The central axis of the gearbox is fixedly arranged relative to the second transmission case, the planetary gears mesh with the second drive gear and the ring gear, respectively, the intermediate input shaft is connected with the second drive gear, and the The second output shaft is connected with the ring gear.

Further, the power head further includes a first connecting assembly, and the intermediate input shaft and the intermediate output shaft are detachably connected through the first connecting assembly.

Further, the power head further includes a sleeve driver connecting device, and the second output shaft and the sleeve driver are detachably connected through the sleeve driver connecting device.

Further, the casing driver connecting device includes a transition body and a plurality of second connecting groups To The transition body includes a first connecting portion for connecting with the second output shaft and a second connecting portion for connecting with the sleeve driver, and the second output shaft is connected to the first The part is detachably connected by a part of the plurality of second connection assemblies, and the second connection part is detachably connected with the sleeve driver by another part of the plurality of second connection assemblies.

A second aspect of the present invention provides a rotary drilling rig, including a power head, wherein the power head is the power head according to any one of the first aspects of the present invention.

Based on the power head of the rotary drilling rig and the rotary drilling rig provided by the present invention, the power head includes a driving device and a transmission device. The transmission device includes an input shaft, a first output shaft and a second output shaft, and the input shaft is drivingly connected with the driving device. The first output shaft is used for driving connection with the drill rod of the rotary drilling rig, and the second output shaft is used for driving connection with the casing driver of the rotary drilling rig. The second output shaft has a first state. In the first state, when the driving device When the input shaft is driven to rotate, the output torque of the second output shaft is greater than the output torque of the first output shaft. The power head can make the second output shaft in the first state when a full set of pipes need to be buried, and output a larger output torque than the output torque when driving the drill pipe to drive the casing driver, so that the rotary drilling rig can be used to automatically The casing can be buried smoothly with functions and can achieve higher construction efficiency.

Through the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings, other features and advantages of the present invention will become clear.

Description of the drawings

The drawings described here are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments and descriptions of the present invention are used to explain the present invention, and do not constitute an improper limitation of the present invention. In the attached picture:

Fig. 1 is a cross-sectional structure diagram of a power head of a rotary drilling rig according to a specific embodiment of the present invention, and a drill rod and a casing driver drivingly connected to the power head.

Fig. 2 is a schematic partial cross-sectional view of the power head of the embodiment shown in Fig. 1.

Fig. 3 is a schematic diagram of the A-A sectional structure of the power head of the embodiment shown in Fig. 1. To

Fig. 4 is a B-B sectional structural diagram of the power head of the embodiment shown in Fig. 1.

Fig. 5 is a C-C cross-sectional structure diagram of the power head of the embodiment shown in Fig. 1.

Fig. 6 is a schematic sectional view of the second output shaft of the power head of the embodiment shown in Fig. 1.

Fig. 7 is a top structural schematic diagram with a partial cross-sectional view of the transition body of the power head of the embodiment shown in Fig. 1.

Fig. 8 is a partial structural diagram of the D-direction of the power head of the embodiment shown in Fig. 1.

Fig. 9 is a schematic structural diagram of a sleeve driver connected to the power head of the embodiment shown in Fig. 1.

In Figures 1 to 9, the reference signs represent:

100. Power head; 110, drive device; 120, reducer; 130, first-stage transmission part; 131, first gear transmission system; 1311, first drive gear; 1312, slewing support; 1312A, inner ring; 1312B, Outer ring; 1312C, rolling element; 132, first output shaft; 133, intermediate output shaft; 134, first transmission case; 135, transmission shaft; 136, input shaft; 1391 bolts; 1392 washers; 1393, bolts 1394, washer; 140, second-stage transmission part; 141, second gear transmission; 1411, second drive gear; 1412, planetary gear; 1413, ring gear; 142, intermediate input shaft; 143, second output shaft 1431, the first shaft sleeve; 144, the second transmission case; 1491, bolts; 1492, washer; 150, drive sleeve; 151, power head drive key; 160, the first connecting component; 161, the first pin shaft; 162. Latch pin; 163. Split pin; 170. Transition body; 171. Mounting hole for the first bushing; 172. Mounting hole for the second bushing; 173. Inner bushing; 174. Outer bushing; 180. Second connecting assembly 181, second pin shaft; 182, bolt; 183, washer; 184, clamp ring; 1911, bolt; 1912, washer; 1921, bolt; 1922, washer; 1931, bolt; 1932, washer; 200, drill rod; 210. Drill rod driving key; 300, casing driver; 310, second shaft sleeve; 320, casing connection part.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually To The above is merely illustrative, and in no way serves as any limitation to the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

Unless specifically stated otherwise, the relative arrangement of components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to actual proportional relationships. The technologies, methods, and equipment known to those of ordinary skill in the relevant fields may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be regarded as part of the authorization specification. In all examples shown and discussed herein, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiment may have different values. It should be noted that similar reference numerals and letters indicate similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further discussed in the subsequent drawings.

For ease of description, spatial relative terms can be used here, such as "above", "above", "on the surface of...", "above "的", etc., are used to describe the spatial positional relationship between one device or feature and other devices or features as shown in the figure. It should be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation of the device described in the figure. For example, if the device in the figure is inverted, then a device described as "above other devices or structures" or "above other devices or structures" will then be positioned as "below the other devices or structures" or "on Under other devices or structures". Thus, the exemplary term "above" can include both orientations "above" and "below". The device can also be positioned and rotated 90 degrees in other different ways or in other orientations, and the relative description of the space used here will be explained accordingly.

As shown in FIGS. 1-9, the power head 100 provided by the present invention includes a driving device 110 and a transmission device. The transmission device includes an input shaft 136, a first output shaft 132 and a second output shaft 143, and the input shaft 136 and the driving device 110 Driving connection, the first output shaft 132 is used for driving connection with the drill rod 200 of the rotary drilling rig, and the second output shaft 143 is used for connecting with the casing driver 300 of the rotary drilling rig To In a driving connection, the second output shaft 143 has a first state. In the first state, when the driving device 110 drives the input shaft 136 to rotate, the output torque of the second output shaft 143 is greater than the output torque of the first output shaft 132.

The power head 100 can make the second output shaft 143 in the first state when a full set of pipes need to be buried, and output a larger output torque than the output torque when driving the drill pipe 200 to drive the casing driver 300, so that it can be used The rotary drilling rig has its own function to bury the casing smoothly and achieve high construction efficiency.

The first-stage transmission part and the second-stage transmission part in series can be arranged in the transmission, and the output torque of the first-stage transmission part is increased by the second-stage transmission part to realize that the output torque of the second output shaft is greater than that of the first-stage transmission part. The output torque of an output shaft. It is also possible to achieve that the output torque of the second output shaft is greater than the output torque of the first output shaft in other ways. For example, two drive trains with different transmission ratios and the outputs corresponding to the two drive trains are arranged in the same gear box. The shaft can output different output torques.

Preferably, the second output shaft 143 also has a second state. In the second state, when the driving device 110 drives the input shaft 136 to rotate, the output torque of the second output shaft 143 is zero. Setting the second state can not affect the normal rotary drilling construction of the rotary drilling rig when the casing driver does not need to be driven, and can reduce unnecessary power consumption of the power head 100.

The switching between the first state and the second state can be realized by connecting or disconnecting the first-stage transmission part and the second-stage transmission part. It is also possible to switch between the first state and the second state in other ways. For example, when the input shaft and the second output shaft are driven by multiple gears, all or part of the multiple gears can be controlled to mesh Or the way of disengagement realizes the switch between the first state and the second state.

Hereinafter, the power head of the rotary drilling rig and the rotary drilling rig according to the embodiment of the present invention will be described with reference to FIGS. 1 to 9.

1 is a schematic cross-sectional structure diagram of a power head 100 of a rotary drilling rig according to a specific embodiment of the present invention, and a drill rod 200 and a casing driver 300 drivingly connected to the power head 100.

As shown in Figure 1, the power head 100 of the rotary drilling rig of this embodiment includes a driving device 110, To The reducer 120, the transmission device, the driving sleeve 150, the first connecting component 160 and the sleeve driver connecting device.

As shown in FIG. 1, the driving device 110 is the power source of the power head 100. In this embodiment, the driving device 110 is a hydraulic motor.

The input shaft of the reducer 120 is connected with the output shaft of the hydraulic motor. Since the output shaft of the hydraulic motor rotates at a high speed, the speed of the output shaft of the reducer 120 is relative to the input shaft of the reducer 120 after a one-stage deceleration is achieved by the reducer 120. The speed decreases and the torque increases.

In this embodiment, the housing of the hydraulic motor is fixed on the housing of the reducer 120 by bolts 1911 and washers 1912.

FIG. 2 is a partial cross-sectional view of the structure of the power head 100 of the embodiment shown in FIG. 1. The structure of the transmission is shown. The transmission device is used to convert the output torque of the reducer 120 into an output torque for driving the drill rod 200 for the power head 100 and an output torque for driving the casing driver 300.

As shown in FIGS. 1 and 2, the transmission device includes a first-stage transmission part 130 and a second-stage transmission part 140.

The first-stage transmission part 130 includes a first gear transmission system 131, a first output shaft 132, an intermediate output shaft 133, a first transmission case 134, a transmission shaft 135 and an input shaft 136. The first gear transmission system 131 is located in the first transmission case 134. The input shaft 136, the first output shaft 132 and the intermediate output shaft 133 respectively protrude from the inside of the first transmission case 134.

The speed reducer 120 is fixed on the first transmission case 134 by bolts 1921 and washers 1922. The input shaft 136 is connected with the output shaft of the reducer 120 to realize the driving connection with the driving device 110.

The first output shaft 132 is used for driving connection with the drill rod 200 of the rotary drilling rig. The intermediate output shaft 133 is used to provide power for the second gear drive train 140 when the power head 100 drives the sleeve driver 300.

The first gear train 131 is used to convert the input torque of the input shaft 136 into the output torque of the first output shaft 132 and the output torque of the intermediate output shaft 133. The first gear train 131 To It is drivingly connected with the transmission shaft 135, and the first output shaft 132 and the intermediate output shaft 133 are respectively connected with the transmission shaft 135.

The first gear train 131 includes a first drive gear 1311 and a slewing support 1312. The slewing support 1312 includes an inner ring 1312A, an outer ring 1312B with external teeth, and rolling elements 1312C.

The first drive gear 1311 is connected to the lower end of the input shaft 136. In this embodiment, the first drive gear 1311 and the input shaft 136 are integrated. The upper end of the input shaft 136 is provided with a spline, and the lower end of the output shaft of the reducer 120 is engaged with the spline for transmission.

The inner ring 1312A and the first transmission case 134 are fixedly connected by bolts 1393 and washers 1394. The outer ring 1312B meshes with the first driving gear 1311, and the outer ring 1312B is fixedly connected with the transmission shaft 135.

The rolling elements 1312C are arranged between the inner ring 1312A and the outer ring 1312B. The rolling element 1312C may be a ball, a roller or a needle. The outer ring 1312B and the transmission shaft 135 are carried on the inner ring 1312A and the first transmission case 134, and the rolling elements 1312C can reduce the friction between the inner ring 1312A and the outer ring 1312B.

The first output shaft 132 has a first flange, and the first flange of the first output shaft 132 and the outer ring 1312B of the slewing support 1312 are connected and fixed by bolts 1391 and washers 1392. The upper end of the transmission shaft 135 of the slewing support 1312 and the lower end of the first output shaft 132 are fixedly connected by welding, and the lower end of the transmission shaft 135 of the slewing support 1312 and the lower end of the intermediate output shaft 133 are fixedly connected by welding. Therefore, in this embodiment, the rotational speed and output torque of the transmission shaft 135, the first output shaft 132, and the intermediate output shaft 133 are the same.

FIG. 3 is a schematic diagram of the A-A cross-sectional structure of the power head 100 of the embodiment shown in FIG. 1. The structure of the second-stage transmission part 140 is shown therein. The second-stage transmission part 140 is used to realize that the output torque of the second output shaft 143 is greater than the output torque of the first output shaft 132.

As shown in FIGS. 1 to 3, the second-stage transmission part 140 includes a second gear transmission system 141, an intermediate input shaft 142, a second output shaft 143 and a second transmission case 144. The second gear transmission system 141 is located in the second transmission case 144. The intermediate input shaft 142 and the second output shaft 143 respectively protrude from the inside of the second transmission case 144. To

The intermediate input shaft 142 is used to connect with the intermediate output shaft 133 to receive power from the intermediate output shaft 133. In this embodiment, the intermediate input shaft 142 and the intermediate output shaft 133 are detachably connected through the first connecting component 160.

The second output shaft 143 is used for driving connection with the casing driver 300 of the rotary drilling rig. In FIG. 1, the second output shaft 143 and the sleeve driver 300 are in a connected state. The second output shaft 143 and the cannula driver 300 are connected by a cannula driver connection device.

The second gear train 141 is used to convert the input torque of the intermediate input shaft 142 into the output torque of the second output shaft 143.

The second gear train 141 includes a second drive gear 1411, a planetary gear 1412 and a ring gear 1413.

The ring gear 1413 has internal teeth. The ring gear 1413 is sleeved on the outside of the second drive gear 1411 and the planetary gear 1412. The second drive gear 1411 has external teeth. The central axis of the planetary gear 1412 is fixedly arranged with respect to the second transmission box 144. The planetary gear 1412 is connected to the second transmission case 144. The driving gear 1411 meshes with the ring gear 1413.

The intermediate input shaft 142 is connected with the second drive gear 1411. In this embodiment, the intermediate input shaft 142 and the second drive gear 1411 are made integrally.

The second output shaft 143 is connected to the ring gear 1413. In this embodiment, the second output shaft 143 has a second flange, the ring gear 1413 is provided with threaded holes, and the second flange and the ring gear 1413 are fixedly connected by bolts 1491 and washers 1492.

In this embodiment, the first output shaft 132 and the intermediate output shaft 133 rotate synchronously. When the intermediate output shaft 133 is connected to the intermediate input shaft 142, the input torque of the intermediate input shaft 142 that rotates synchronously with the intermediate output shaft 133 passes through the second The gear train 141 is transformed into the output torque of the second output shaft 143 that is greater than the output torque of the first output shaft 132. By setting an appropriate transmission ratio of the second gear train 141, the required output torque of the second output shaft 143 can be obtained. For example, the output torque of the second output shaft 143 can be made to be twice or more than the output torque of the first output shaft 132, so that the output torque of the power head 100 is doubled to meet the power demand when the full set of pipes are buried. To

FIG. 4 is a schematic view of the B-B cross-sectional structure of the power head 100 of the embodiment shown in FIG. 1. The matching structure of the driving sleeve 150 and the drill rod 200 is shown. The driving sleeve 150 is used to drive the drill rod 200 of the rotary drilling rig to rotate.

As shown in FIG. 1, the upper end of the driving sleeve 150 and the lower end of the first output shaft 132 are fixedly connected by bolts 1931 and washers 1932.

As shown in FIGS. 1 and 4, the inner wall of the driving sleeve 150 is fixedly connected with a plurality of power head driving keys 151 arranged along the axial direction of the driving sleeve 150. Correspondingly, a plurality of drill rod driving keys 210 arranged along the axial direction of the drill rod 200 are fixedly connected to the shaft body of the drill rod 200. After the drill rod 200 and the power head 100 are assembled, the plurality of power head driving keys 151 and the plurality of drill rod driving keys 210 are spaced apart from each other in the circumferential direction. Therefore, the rotation of the first output shaft 132 can drive the drive sleeve 150 to rotate, and the cooperation of the multiple power head drive keys 151 and the multiple drill rod drive keys 210 can drive the drill rod 200 to rotate when the drive sleeve 150 rotates.

Fig. 5 is a C-C cross-sectional structure diagram of the power head 100 of the embodiment shown in Fig. 1. The structure of the first connecting component 160 is shown therein. The first connecting component 160 is used to realize the detachable connection between the intermediate input shaft 142 and the intermediate output shaft 133.

As shown in FIGS. 1 and 5, the first connection assembly 160 includes a first pin 161, a plug pin 162 and a split pin 163.

The first pin shaft 61 has a stopper protrusion on its side surface at one end. When the intermediate output shaft 133 and the intermediate input shaft 142 are connected, the intermediate input shaft 142 is fitted on the outside of the intermediate output shaft 133. Then, the end of the first pin shaft 61 without the stop protrusion is passed through the intermediate input shaft 142 and the intermediate output shaft 133 in turn. The pin hole of the intermediate input shaft 142 has a pin seat on both sides. After the first pin shaft 61 is inserted, the pin The plug 162 is inserted into the pin seat, and the plug pin 162 is just blocked on the axial outer side of the end of the first pin shaft 61 with the stop protrusion, so as to prevent the first pin shaft 61 from coming out. Finally, a split pin 163 is inserted into the tail of the plug pin 162 to prevent the plug pin 162 from falling out of the plug socket.

By adopting the first connecting component 160, the intermediate output shaft 133 and the intermediate input shaft 142 can be quickly connected and disconnected quickly, thereby improving work efficiency.

6 is a cross-sectional view of the second output shaft 143 of the power head 100 of the embodiment shown in FIG. 1 To Schematic. FIG. 7 is a top structural schematic diagram with a partial cross-sectional view of the transition body 170 of the power head 100 of the embodiment shown in FIG. 1. FIG. 8 is a schematic diagram of the D-direction partial structure of the power head 100 of the embodiment shown in FIG. 1. The installation structure of the second connection assembly 180 is shown in FIG. 8. FIG. 9 is a schematic structural diagram of a sleeve driver 300 connected to the power head 100 of the embodiment shown in FIG. 1.

6 to 9 show the structure of the second output shaft 143, the sleeve driver connecting device, the sleeve driver 300, and the connection relationship among the three. The casing driver connecting device is used to connect the second output shaft 143 and the casing driver 300.

As shown in FIGS. 1 and 6 to 9, the casing driver connection device includes a transition body 170 and a second connection assembly 180.

The transition body 170 includes a first connecting part for connecting with the second output shaft 143 and a second connecting part for connecting with the sleeve driver 300. The second output shaft 143 and the first connecting part pass through a plurality of second connecting components. 180 is connected, and the second connection part is connected to the sleeve driver 300 through a plurality of second connection components 180.

As shown in Figures 1 and 6, the second output shaft 143 is a hollow shaft. The second output shaft includes two first sleeves 1431 arranged on the shaft wall of the hollow shaft at an interval of 180 degrees. The sleeves 1431 are all arranged along the radial direction of the second output shaft 143.

As shown in FIGS. 1 and 7, in this embodiment, the transition body 170 has an annular structure with a cross-sectional shape of "H" as a whole. The annular structure includes an inner tube and an outer tube that are concentrically arranged and both are flat tubes, and an annular plate connected between the outer wall of the inner tube and the inner wall of the outer tube.

The first connecting portion includes two first sleeve mounting holes 171 arranged on the annular plate at an interval of 180 degrees, two inner sleeves 173 arranged on the inner cylinder at an interval of 180 degrees, and two inner sleeves 173 arranged at an interval of 180 degrees. Two outer sleeves 174 on the outer cylinder. An inner sleeve 173 is provided on the inner side of each first sleeve mounting hole 171, and an outer sleeve 174 is provided on the outer side of each first sleeve mounting hole 171, which is located at the inner and outer sides of the same first sleeve mounting hole 171. The inner sleeve 173 and the outer sleeve 174 are coaxial and are both arranged along the radial direction of the ring structure.

When the second output shaft 143 is connected to the transition body 170, the two first sleeves 1431 of the second output shaft 143 are respectively assembled into the two first sleeve mounting holes 171 of the transition body 170, To Align the inner sleeve 173 and the outer sleeve 174 on both sides of each first sleeve mounting hole 171 with the corresponding first sleeve 1431, and then connect the aligned outer sleeve 174, The first sleeve 1431 and the inner sleeve 173 can connect the second output shaft 143 and the transition body 170 together.

As shown in FIGS. 1 and 8, each second connecting assembly 180 includes a second pin 181, a bolt 182, a washer 183 and a collar 184. One end of the second pin shaft 181 has a collar mounting groove on the radially outer side. The clamp ring 184 is composed of two half rings, and each half ring is provided with two through holes. The radially outer end of each outer sleeve 174 on the outer cylinder of the transition body 170 is provided with four threaded holes corresponding to the four through holes on the two half rings one by one.

When connecting the outer sleeve 174, the first sleeve 1431, and the corresponding inner sleeve 173 outside the first sleeve mounting hole 171 through the second connecting assembly 180, first connect the second pin 181 that does not have a clamp ring mounting groove One end is inserted into the outer sleeve 174, the first sleeve 1431 and the inner sleeve 173 in sequence, and then the two half rings of the clamp ring 184 are clamped into the clamp ring installation groove, and the two half rings are connected by four sets of bolts 182 and washers 183. They can be connected to the outer sleeve 174 respectively.

The second connecting portion includes two second sleeve mounting holes 172 arranged on the annular plate at an interval of 180 degrees, two inner sleeves 173 arranged on the inner cylinder at an interval of 180 degrees, and two inner sleeves 173 arranged at an interval of 180 degrees. Two outer sleeves 174 on the outer cylinder. The two first shaft sleeve installation holes 171 and the two second shaft sleeve installation holes 172 are alternately arranged, and the adjacent first shaft sleeve installation holes 171 and the second shaft sleeve installation holes 172 are separated by 90 degrees. An inner sleeve 173 is provided on the inner side of each second sleeve mounting hole 172, and an outer sleeve 174 is provided on the outer side of each second sleeve mounting hole 172, which is located inside and outside of the same second sleeve mounting hole 172. The inner sleeve 173 and the outer sleeve 174 are coaxial and are both arranged along the radial direction of the ring structure.

As shown in FIG. 9, the top end of the sleeve driver 300 is provided with two second sleeves 310 at an interval of 180 degrees, and the two second sleeves 310 are both arranged along the radial direction of the sleeve driver 300. A sleeve connecting part 320 for connecting the sleeve to the sleeve driver 300 is also provided at the bottom of the sleeve driver 300.

When the sleeve driver 300 is connected to the transition body 170, only the two second sleeves 310 To They are respectively assembled into the two second bushing mounting holes 172 of the transition body 170, so that the inner bushing 173 and the outer bushing 174 on both sides of each second bushing mounting hole 172 are aligned with the corresponding second bushing 310 Then, the aligned outer sleeve 174, second sleeve 310, and inner sleeve 173 are connected through the second connecting assembly 180 to connect the transition body 170 and the sleeve driver 300 together, thereby realizing the second output shaft 143 is connected to the cannula driver 300.

The process of connecting the outer sleeve 174, the second sleeve 310, and the corresponding inner sleeve 173 outside the second sleeve mounting hole 172 through the second connecting component 180 is the same as connecting the first sleeve mounting hole 171 through the second connecting component 180 The processes of the outer outer sleeve 174, the first sleeve 1431 and the corresponding inner sleeve 173 are the same, and will not be repeated here.

In addition, this embodiment also provides a rotary drilling rig including the aforementioned power head 100.

When the rotary drilling rig is constructed by ordinary construction method, the transmission device only adopts the first-stage transmission part 130. The first gear transmission 131 in the first-stage transmission part 130 can reduce the output speed and increase the output torque to achieve the performance of the rotary drilling rig. Parameter design requirements for ordinary drilling. Among them, the first gear train 131 is drivingly connected to the first output shaft 132 and the intermediate output shaft 133, and the first output shaft 132 is rigidly connected to the driving sleeve 150, so that the output torque and speed of the driving sleeve 150 are the same as the output of the first output shaft 132. The torque and speed are kept consistent respectively, that is, the hydraulic motor drives the first gear train 131 through the reducer 120, and transmits the torque and speed to the drill rod 200 through the first output shaft 132 and the drive sleeve 150, thereby driving the drill rod 200 to rotate , To realize the ordinary drilling function of the rotary drilling rig. At this time, the rotary drilling rig uses its standard torque for construction.

When a complete set of pipes is required for construction, the intermediate output shaft 133 of the first gear drive train 131 is connected to the intermediate input shaft 142, so that a second gear drive system 140 is added to the transmission device. 141 can further reduce the output speed of the first gear drive train 131, and at the same time increase the output torque, so as to achieve the torque increase requirement of the rotary drilling rig. The hydraulic motor drives the first gear train 131 and the second gear train 141 through the reducer 120 to drive two sets of gears, and transmits the torque and speed to the casing driver 300 through the second output shaft 143. At this time, the rotary drilling rig is in On the basis of the standard torque, construction is carried out with an increased construction torque.

Since the first-stage transmission part 130 and the second-stage transmission part 140 can be completely separated from each other, To When the power head 100 is required to drive the casing driver 300 to bury a full set of pipes, the normal rotary drilling construction of the rotary drilling rig will not be affected.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them; although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that: The specific implementation of the invention is modified or some technical features are equivalently replaced; without departing from the spirit of the technical solution of the present invention, all of them shall be covered by the scope of the technical solution claimed by the present invention. To

Claims

A power head of a rotary drilling rig, which is characterized by comprising: a driving device (110) and a transmission device, the transmission device including an input shaft (136), a first output shaft (132) and a second output shaft (143) , The input shaft (136) is drivingly connected with the driving device (110), the first output shaft (132) is used for drivingly connected with the drill rod (200) of the rotary drilling rig, and the second output The shaft (143) is used for driving connection with the casing driver (300) of the rotary drilling rig. The second output shaft (143) has a first state. In the first state, when the driving device (110 When driving the input shaft (136) to rotate, the output torque of the second output shaft (143) is greater than the output torque of the first output shaft (132).
The power head according to claim 1, wherein the second output shaft (143) also has a second state, and in the second state, when the driving device (110) drives the input shaft ( 136) When rotating, the output torque of the second output shaft (143) is zero.
The power head according to claim 2, characterized in that, the transmission device comprises a first-stage transmission part (130) and a second-stage transmission part (140), and the input of the first-stage transmission part (130) A shaft (136), the first output shaft (132), and an intermediate output shaft (133) drivingly connected to the input shaft (136), and the second-stage transmission portion (130) includes an intermediate input shaft (142) And the second output shaft (143) drivingly connected with the intermediate input shaft (142), wherein, in the first state, the intermediate input shaft (142) is connected with the intermediate output shaft (133) In the second state, the intermediate input shaft (142) is disengaged from the intermediate output shaft (133).
The power head according to claim 3, characterized in that, the first-stage transmission part (130) further comprises a first gear transmission system (131), and the first gear transmission system (131) is used to transfer the The input torque of the input shaft (136) is transformed into the output torque of the first output shaft (132) and the output torque of the intermediate output shaft (133). To
The power head according to claim 4, characterized in that the first-stage transmission part (130) further comprises a transmission shaft (135), and the input shaft (136) passes through the first gear transmission system (131) It is drivingly connected with the transmission shaft (135), and the first output shaft (132) and the intermediate output shaft (133) are respectively connected with the transmission shaft (135).
The power head according to claim 5, wherein the first-stage transmission part (130) further comprises a first transmission case (134), and the first gear transmission system (131) is located in the first transmission case (134). In the transmission case (134), the input shaft (136), the first output shaft (132) and the intermediate output shaft (133) respectively extend from the inside of the first transmission case (134).
The power head according to claim 6, wherein the first gear drive train (131) comprises a first drive gear (1311) and a slewing support (1312), and the first drive gear (1311) is connected to the first drive gear (1311) and a slewing support (1312). The input shaft (136) is connected, the slewing support (1312) includes an inner ring (1312A) and an outer ring (1312B) with external teeth, the inner ring (1312A) and the first transmission case (134) In a fixed connection, the outer ring (1312B) meshes with the first drive gear (1311) and is connected with the transmission shaft (135).
The power head according to claim 7, characterized in that the slewing support (1312) further comprises rolling elements (1312C), and the rolling elements (1312C) are arranged on the inner ring (1312A) and the outer ring (1312B).
The power head according to claim 3, characterized in that, the second-stage transmission part (140) further comprises a second gear transmission system (141), and the second gear transmission system (141) is used to transfer the The input torque of the intermediate input shaft (142) is transformed into the output torque of the second output shaft (143).
The power head according to claim 9, characterized in that the second-stage transmission part (140) further comprises a second transmission case (144), and the second gear transmission system (141) is located in the second transmission case (144). In the transmission case (144), the intermediate input shaft (142) and the second output shaft (143) respectively extend from the inside of the second transmission case (144). To
The power head according to claim 10, characterized in that the second gear drive train (141) includes a second drive gear (1411), a planetary gear (1412) and a ring gear (1413) with internal teeth, so The ring gear (1413) is sleeved on the outside of the second drive gear (1411) and the planet gear (1412), and the central axis of the planet gear (1412) is relative to the second transmission box (144) The planetary gear (1412) is fixedly arranged and meshes with the second drive gear (1411) and the ring gear (1413) respectively, and the intermediate input shaft (142) is connected with the second drive gear (1411) , The second output shaft (143) is connected with the ring gear (1413).
The power head according to claim 3, wherein the power head further comprises a first connecting assembly (160), and the intermediate input shaft (142) and the intermediate output shaft (133) pass through the first The connecting assembly (160) is detachably connected.
The power head according to claim 1, characterized in that, the power head further comprises a casing drive connecting device, and the second output shaft (143) and the casing drive (300) pass through the casing drive The connecting device is detachably connected.
The power head according to claim 13, characterized in that the casing driver connection device comprises a transition body (170) and a plurality of second connection components (180), and the transition body (170) comprises The first connecting part connected to the second output shaft (143) and the second connecting part used to connect with the sleeve driver (300), the second output shaft (143) and the first connecting part pass A part of the plurality of second connecting assemblies (180) is detachably connected, and the second connecting portion and the sleeve driver (300) pass through another part of the plurality of second connecting assemblies (180) Removably connected.
A rotary drilling rig comprising a power head, characterized in that the power head is the power head according to claim 1. To