阅读说明：本技术 卷扬加压系统及旋挖钻机 (Winch pressurization system and rotary drilling rig ) 是由 陈玉磊 赵涤辉 杨龙君 李士战 于 2020-08-27 设计创作，主要内容包括：一种卷扬加压系统,包括加压卷扬、第一钢丝绳、第一定滑轮组、第一动滑轮、第二钢丝绳、第二定滑轮组和第二动滑轮。第一动滑轮和第二动滑轮设置在动力头上。第一定滑轮组包括设置在上桅杆的第一滑轮和第二滑轮；第一钢丝绳的一端缠绕于加压卷扬、另一端由加压卷扬引出后依次卷绕在第二滑轮、第一动滑轮和第一滑轮上与上桅杆相连；第二定滑轮组包括设置在下桅杆的第三滑轮,第二钢丝绳的一端缠绕于加压卷扬、另一端由加压卷扬引出后依次卷绕在第三滑轮和第二动滑轮上与下桅杆相连；第一钢丝绳与第二钢丝绳在加压卷扬上的缠绕方向相反。本发明的卷扬加压系统的滑轮数量较少,可减少钢丝绳的使用长度,从而节省成本,减少钢丝绳的磨损。(A winch pressurization system comprises a pressurization winch, a first steel wire rope, a first fixed pulley block, a first movable pulley, a second steel wire rope, a second fixed pulley block and a second movable pulley. The first movable pulley and the second movable pulley are arranged on the power head. The first fixed pulley group comprises a first pulley and a second pulley which are arranged on the upper mast; one end of a first steel wire rope is wound on the pressurized winch, and the other end of the first steel wire rope is led out by the pressurized winch and then sequentially wound on the second pulley, the first movable pulley and the first pulley to be connected with the upper mast; the second fixed pulley block comprises a third pulley arranged on the lower mast, one end of a second steel wire rope is wound on the pressurization winch, and the other end of the second steel wire rope is led out by the pressurization winch and then sequentially wound on the third pulley and the second movable pulley to be connected with the lower mast; the first steel wire rope and the second steel wire rope are wound in opposite directions on the pressurizing winch. The winch pressurization system has the advantages that the number of pulleys is small, the using length of the steel wire rope can be reduced, the cost is saved, and the abrasion of the steel wire rope is reduced.)

1. A hoisting pressurization system (100) is suitable for a rotary drilling rig, the rotary drilling rig comprises a mast (102) and a power head (16) movably arranged on the mast (102), and the mast (102) comprises an upper mast (9), a middle mast (3) and a lower mast (20) which are sequentially connected; the hoisting and pressurizing system (100) is characterized by comprising a pressurizing winch (2), a first steel wire rope (4), a first fixed pulley block (110), a first movable pulley (17), a second steel wire rope (19), a second fixed pulley block (120) and a second movable pulley (18); the first movable pulley (17) and the second movable pulley (18) are arranged on the power head (16), and the pressurizing winch (2) is arranged on the middle mast (3); the first pulley block (110) comprises a first pulley (6) and a second pulley (8), and the first pulley (6) and the second pulley (8) are arranged on the upper mast (9); one end of the first steel wire rope (4) is wound on the pressurizing winch (2), and the other end of the first steel wire rope is led out from the pressurizing winch (2) and then sequentially wound on the second pulley (8), the first movable pulley (17) and the first pulley (6) to be connected with the upper mast (9); the second fixed pulley group (120) comprises a third pulley (21) arranged on the lower mast (20), one end of the second steel wire rope (19) is wound on the pressurizing winch (2), and the other end of the second steel wire rope is led out from the pressurizing winch (2) and then sequentially wound on the third pulley (21) and the second movable pulley (18) to be connected with the lower mast (20); the winding directions of the first steel wire rope (4) and the second steel wire rope (19) on the pressurizing winch (2) are opposite.

2. Hoisting pressurization system (100) according to claim 1, characterized in that said pressurized hoisting (2) is fixed to said middle mast (3) by means of a pressurized hoisting frame (1); the first pulley (6) and the second pulley (8) are arranged at the non-end of the upper mast (9) far away from the middle mast (3).

3. The hoisting pressurization system (100) of claim 1, characterized in that the hoisting pressurization system (100) further comprises a wire rope tensioning cylinder (5) and a rope presser (23), the wire rope tensioning cylinder (5) being fixed to the upper mast (9) and located between the first sheave (6) and the middle mast (3), the rope presser (23) being fixed to an end of the lower mast (20) remote from the middle mast (3); the first steel wire rope (4) is led out from the pressurization winch (2) and then sequentially wound on the second pulley (8), the first movable pulley (17) and the first pulley (6) to be connected with the steel wire rope tensioning oil cylinder (5), and the second steel wire rope (19) is led out from the pressurization winch (2) and then sequentially wound on the third pulley (21) and the second movable pulley (18) to be connected with the rope pressing device (23).

4. Hoisting pressurization system (100) according to claim 1, characterized in that the number of said first pulleys (6) is two, each first pulley (6) is fixed to the end of said upper mast (9) far from said middle mast (3) by means of a first shaft (7), and two first pulleys (6) are arranged side by side and in a direction perpendicular to the length extension direction of said upper mast (9).

5. Hoisting pressurization system (100) according to claim 4, characterized in that said second sheave (8) is arranged on said first shaft (7) coaxially to one of said first sheaves (6).

6. Hoisting pressurization system (100) according to claim 5, characterized in that said first movable sheave (17) and second movable sheave (18) are arranged side by side and in a direction parallel to the length extension of said middle mast (3), said first movable sheave (17) being closer to said upper mast (9) than said second movable sheave (18).

7. Hoisting pressurization system (100) according to claim 6, characterized in that the axial direction of said first movable sheave (17) and said second movable sheave (18) is parallel and perpendicular to the axial direction of said first sheave (6).

8. Hoisting pressurization system (100) according to claim 1, characterized in that said third pulley (21) is fixed to said lower mast (20) by means of a third shaft (22), said third pulley (21) being at an angle θ to said lower mast (20), wherein θ ranges from 20 ° to 30 °.

9. A rotary drilling rig, characterized by comprising a hoisting pressurization system (100) according to any one of claims 1 to 8.

10. The transportation method of the rotary drilling rig according to claim 9, wherein the transportation method comprises the following steps:

placing the power head (16) on the lower mast (20), detaching the second wire rope (19) from the lower mast (20), and loosening the second wire rope (19);

connecting bolts of the lower mast (20) and the middle mast (3) are disassembled, and the upper mast (9) and the middle mast (3) are fallen down to enable the height of the mast (102) to meet the transportation height;

and (3) detaching the connecting bolts of the upper mast (9) and the middle mast (3), rotating the pressurizing winch (2) to relax the first steel wire rope (4), and folding the upper mast (9) to enable the rotary drilling rig to meet the requirement of the transportation length.

Technical Field

The invention relates to the technical field of pile foundation construction equipment, in particular to a hoisting pressurization system and a rotary drilling rig with the same.

Background

The rotary drilling rig can be divided into two types according to the pressurizing mode: a rotary drilling rig pressurized by an oil cylinder and a rotary drilling rig pressurized by a winch. The winch pressurization mainly adopts the pulley block steel wire rope for pressurization, belongs to flexible pressurization, can achieve the effect of pulse pressurization through the tensile force of the steel wire rope, effectively relieves the reaction force generated by drilling rocks, reduces the impact on the mast, and prolongs the service life of the mast.

The hoisting pressurization rotary drilling rig is adopted, a hoisting pressurization system comprises a hoist, a steel wire rope, a pulley block and the like, and the improper arrangement of the hoisting pressurization system can cause the pressurization stroke of a power head on a mast to be influenced. Secondly, the structure of the hoisting pressurization system is relatively complex, and the steel wire rope is a flexible body and is easy to interfere, collide and rub with other structural members, so that the abnormal abrasion of the steel wire rope is caused, and potential safety hazards are generated in the working process. Moreover, the steel wire rope is an easily worn part and needs to be maintained and replaced regularly, so that the cost of the steel wire rope and the later maintenance cost are high. The rotary drilling rig still needs to be transported and transferred frequently, the steel wire rope needs to be disassembled in the transportation process of the whole machine, but the disassembling and assembling processes of the steel wire rope are quite complicated, and the transportation is inconvenient.

For example, in patent application No. CN201120190631.6 (prior art one), a steel wire rope pressurization system for a rotary drilling rig is disclosed, which mainly comprises a pressurized winch 1, six fixed pulleys (9, 10, 11, 13, 14, 16), two movable pulleys (6, 8), a pressurized steel wire rope 2, a pull-up steel wire rope 3, a tensioning cylinder 12, a wedge sleeve 15, an upper mast 17, a middle mast 18 and a tail mast 19. The rope winding mode of the rotary drilling rig steel wire rope pressurizing system is complicated and complex, the pressurizing steel wire rope 2 is repeatedly wound among the fixed pulley 10, the movable pulley 8, the fixed pulley 11 and the fixed pulley 16, the number of pulleys and the length of the pressurizing steel wire rope are increased, and the cost of a host machine is increased, the abrasion of the pressurizing steel wire rope is aggravated, and the maintenance is complex. One end of the pulling steel wire rope 3 is fixed at the upper end of the middle mast 18 through the wedge sleeve 15, so that the pulling steel wire rope 3 is inconvenient to disassemble and assemble. And because the fixed position of the tail end of the hoisting steel wire rope 3 (namely the wedge sleeve 15) is arranged at the upper side (the middle mast 18) and the fixed position of the tensioning oil cylinder 12 at the tail end of the pressurizing steel wire rope 2 is arranged at the lower side, the pressurizing stroke cannot be extended to the upper mast 17 for the convenience of disassembling and assembling the steel wire rope, the pressurizing stroke of the whole machine is sacrificed, and the operation of descending the long pile casing cannot be met.

For another example, in patent application document No. cn201220728265.x (prior art two), a hoisting and pressurizing system and a rotary drilling rig are disclosed, wherein one end of a hoisting steel wire rope 2 is wound on a winding drum of a pressurizing hoisting 1, the other end of the hoisting steel wire rope is led out from one side of the winding drum, and the hoisting steel wire rope sequentially rounds a fixed pulley block 4 and a power head first movable pulley 6 and is connected with a mast of the rotary drilling rig; one end of the pressurizing steel wire rope 5 is wound on the winding drum of the pressurizing winch 1, the other end of the pressurizing steel wire rope is led out from the other side of the winding drum, and the pressurizing steel wire rope sequentially rounds the second fixed pulley block 15, the power head second movable pulley 7 and the third fixed pulley block 14 to be connected with the tensioning oil cylinder 8. Wherein, the first fixed pulley group 4 comprises a fixed pulley; the second fixed pulley group 15 comprises two fixed pulleys 3 and 11, and the third fixed pulley group 14 comprises a fixed pulley 9 and a fixed pulley 10 which is obliquely arranged on one side of the mast 17; the tensioning cylinder 8 is arranged on the side of the mast 17. The winch pressurization system of the rotary drilling rig can limit the pressurization stroke of the rotary drilling rig.

Furthermore, in the first and second prior art, in order to solve the problem of rope disorder caused by an overlarge rope outlet angle of the pressurizing steel wire rope on the pressurizing winch, the first prior art is additionally provided with the transition pulley 9, and the second prior art is additionally provided with the transition pulley 3, so that the service length of the steel wire rope is increased, and the cost is increased.

Finally, in the first and second prior art, the steel wire rope fixing point is on the top, and the tensioning oil cylinder is under the top, so that the structure can increase the steel wire rope dismounting steps during transportation of the rotary drilling rig. For example, the two pressurized hoisting systems are mounted on a parallelogram rotary drilling rig, and the rotary drilling rig needs to be switched from a working state to a transportation state through the following steps: 1. after the mast is inverted, the fixed end of the steel wire rope on the middle mast is disassembled; (the fixed end of a steel wire rope where a tensioning oil cylinder of a common rotary drilling rig is located is a non-detachable end) 2, and detaching a connecting bolt between the middle mast and the lower mast after the mast is erected; 3. after the power head is placed at the lowest point of the lower mast, the pressurizing winch is rotated to tension the steel wire rope, and the mast is reversed to reach the transportation height. In summary, the fixing point of the wire rope is at the upper part, the fixing point of the tensioning cylinder is at the lower part, and the step 1 mast and the step 2 mast are required to be passed in order to detach the fixing point of the wire rope at the upper end.

Disclosure of Invention

The invention aims to provide a winch pressurization system, which has fewer pulleys and can reduce the use length of a steel wire rope, thereby saving the cost and reducing the abrasion of the steel wire rope.

The technical problem to be solved by the invention is realized by adopting the following technical scheme.

A hoisting pressurization system is suitable for a rotary drilling rig, the rotary drilling rig comprises a mast and a power head movably arranged on the mast, and the mast comprises an upper mast, a middle mast and a lower mast which are sequentially connected; the winch pressurization system comprises a pressurization winch, a first steel wire rope, a first fixed pulley block, a first movable pulley, a second steel wire rope, a second fixed pulley block and a second movable pulley; the first movable pulley and the second movable pulley are arranged on the power head, and the pressurizing winch is arranged on the middle mast; the first fixed pulley group comprises a first pulley and a second pulley, and the first pulley and the second pulley are arranged on the upper mast; one end of a first steel wire rope is wound on the pressurized winch, and the other end of the first steel wire rope is led out by the pressurized winch and then sequentially wound on the second pulley, the first movable pulley and the first pulley to be connected with the upper mast; the second fixed pulley block comprises a third pulley arranged on the lower mast, one end of a second steel wire rope is wound on the pressurization winch, and the other end of the second steel wire rope is led out by the pressurization winch and then sequentially wound on the third pulley and the second movable pulley to be connected with the lower mast; the first steel wire rope and the second steel wire rope are wound in opposite directions on the pressurizing winch.

Further, the pressurizing winch is fixed on the middle mast through the pressurizing winch frame; the first pulley and the second pulley are disposed at the non-end portion of the upper mast away from the middle mast.

Furthermore, the hoisting pressurization system also comprises a steel wire rope tensioning oil cylinder and a rope pressing device, wherein the steel wire rope tensioning oil cylinder is fixed on the upper mast and positioned between the first pulley and the middle mast, and the rope pressing device is fixed at the non-end part of the lower mast far away from the middle mast; the first steel wire rope is led out from the pressurization winch and then sequentially wound on the second pulley, the first movable pulley and the first pulley to be connected with the steel wire rope tensioning oil cylinder, and the second steel wire rope is led out from the pressurization winch and then sequentially wound on the third pulley and the second movable pulley to be connected with the rope pressing device.

Furthermore, the number of the first pulleys is two, each first pulley is fixed at one end, far away from the middle mast, of the upper mast through a first shaft, and the two first pulleys are arranged side by side and the arrangement direction of the two first pulleys is perpendicular to the length extension direction of the upper mast.

Further, a second pulley is disposed coaxially with one of the first pulleys on the first shaft.

Furthermore, first movable pulley and second movable pulley set up side by side and arrange the direction and be parallel with the length extending direction of middle mast pole, and first movable pulley compares the second movable pulley and is more close to the upper mast.

Further, the axial directions of the first movable pulley and the second movable pulley are parallel and perpendicular to the axial direction of the first pulley.

Further, a third pulley is fixed on the lower mast through a third shaft, and the third pulley and the lower mast form an included angle theta, wherein the range of theta is 20-30 degrees.

Another object of the present invention is to provide a rotary drilling rig, which carries the hoisting and pressurizing system, wherein the number of pulleys of the hoisting and pressurizing system is small, and the service length of the steel wire rope can be reduced; moreover, the steel wire rope does not need to be disassembled when the rotary drilling rig is in a transportation state, the disassembling steps are simple, and the transportation is convenient.

Another object of the present invention is to provide the transportation method of the rotary drilling rig, including: placing the power head on the lower mast, and detaching the second steel wire rope from the lower mast to enable the second steel wire rope to be loosened; connecting bolts of the lower mast and the middle mast are removed, and the upper mast and the middle mast are fallen down to enable the height of the mast to meet the transportation height; and (3) detaching the connecting bolts of the upper mast and the middle mast, rotating the pressurized winch to loosen the first steel wire rope while rotating the pressurized winch, and folding the upper mast while rotating the pressurized winch to enable the rotary drilling rig to meet the transportation length.

The above description is only an outline of the technical solution of the present invention, and can be implemented according to the content of the description in order to make the technical means of the present invention more clearly understood, and in order to make other objects, features and advantages of the hoisting and pressurizing system and the rotary drilling rig of the present invention more obvious and understandable, the following preferred embodiments are described in detail with reference to the attached drawings.

Drawings

Fig. 1 is a schematic structural diagram of a rotary drilling rig according to a preferred embodiment of the present invention.

Fig. 2 is a schematic diagram of a hoisting and pressurizing system of the rotary drilling rig according to the preferred embodiment of the invention.

Fig. 3 is a schematic structural diagram of an upper mast of the rotary drilling rig according to the preferred embodiment of the invention.

Fig. 4A is a schematic structural diagram of a lower mast of the rotary drilling rig according to the preferred embodiment of the invention.

FIG. 4B is a cross-sectional view taken along line IV-IV of FIG. 4A.

Fig. 5 is a schematic view of a transportation state of the rotary drilling rig according to the preferred embodiment of the invention.

Detailed Description

To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined object, the following detailed description will be made on the specific implementation, structure, features and effects of the hoisting pressurization system and the rotary drilling rig with the same according to the present invention with reference to the accompanying drawings and preferred embodiments as follows:

the foregoing and other technical matters, features and effects of the present invention will be apparent from the following detailed description of preferred embodiments, which is to be read in connection with the accompanying drawings. While the present invention has been described in connection with the preferred embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but is intended to cover various modifications, equivalent arrangements, and specific embodiments thereof.

As shown in fig. 1 and 5, the hoisting pressurization system of the invention is suitable for being used on a rotary drilling rig. The rotary drilling rig comprises a main machine 101 and a mast 102 pivoted on the main machine 101, wherein the mast 102 can be opened to a substantially vertical state or folded onto the main machine 101. The mast 102 comprises an upper mast 9, a middle mast 3 and a lower mast 20 which are connected in sequence, and a power head 16 is movably arranged on the mast 102.

Referring to fig. 1 to 2, the winch pressurization system 100 includes a pressurization winch 2, a first wire rope 4, a first fixed pulley block 110, a first movable pulley 17, a second wire rope 19, a second fixed pulley block 120, and a second movable pulley 18. The first movable pulley 17 and the second movable pulley 18 are provided on the power head 16, and the pressurized winch 2 is provided on the middle mast 3. The first set of tackle pulleys 110 comprises a first pulley 6 and a second pulley 8, the first pulley 6 and the second pulley 8 being arranged at the upper mast 9, in particular for example at the end of the upper mast 9 remote from the middle mast 3. One end of a first steel wire rope 4 is wound on the pressurized winch 2, and the other end of the first steel wire rope is led out from the pressurized winch 2 and then sequentially wound on the second pulley 8, the first movable pulley 17 and the first pulley 6 to be connected with the upper mast 9. The second fixed pulley group 120 comprises a third pulley 21 arranged on the lower mast 20, one end of a second steel wire rope 19 is wound on the pressure winch 2, and the other end of the second steel wire rope is led out from the pressure winch 2 and then sequentially wound on the third pulley 21 and the second movable pulley 18 to be connected with the lower mast 20. The first wire rope 4 and the second wire rope 19 are wound around the pressure winding 2 in opposite directions.

Specifically, the pressure winch 2 is fixed on the middle mast 3 through the pressure winch frame 1, the pressure winch frame 1 is embedded on the middle mast 3 and connected in a welding mode, and the pressure winch 2 is connected with the pressure winch frame 1 through a bolt.

Further, the hoisting pressurization system 100 further includes a wire rope tensioning cylinder 5, the wire rope tensioning cylinder 5 is fixed to the upper mast 9 and located between the first pulley 6 and the middle mast 3, for example, by a wedge sleeve, that is, when the mast 102 is vertically placed, the wire rope tensioning cylinder 5 is located below the first pulley 6, the first movable pulley 17 is located below the wire rope tensioning cylinder 5, and the wire rope tensioning cylinder 5 and the power head 16 are respectively located at two sides of the mast 102 that are away from each other. The first steel wire rope 4 is led out from the pressurizing winch 2 and then sequentially wound on the second pulley 8, the first movable pulley 17 and the first pulley 6 to be connected with the steel wire rope tensioning oil cylinder 5.

Further, the hoisting pressurization system 100 further comprises a rope press 23, and the rope press 23 is fixed to the lower mast 20, for example, by a wedge sleeve, and particularly, for example, fixed to an end portion of the lower mast 20 far away from the middle mast 3. The second wire rope 19 is led out from the pressurized winch 2 and then sequentially wound on the third pulley 21 and the second movable pulley 18 to be connected with the rope presser 23.

In other embodiments of the present invention, the positions of the cable tensioning cylinder 5 and the cable presser 23 can be interchanged.

The rope winding method of the first steel wire rope 4 and the second steel wire rope 19 ensures that the power head is pressurized on the mast 102 in a full stroke, so that the pressurizing stroke of the rotary drilling rig is long, and the working operation of the lower pile casing can be met.

Further, as shown in fig. 3, the number of the first pulleys 6 is two, and each first pulley 6 is fixed on the upper end of the upper mast 9 through a first shaft 7, wherein the two first pulleys 6 are arranged side by side and are arranged in a direction perpendicular to the length extension direction of the upper mast 9, that is, when the mast 102 is vertically placed, the two first pulleys 6 are arranged side by side in a transverse direction, and the axial directions of the two first pulleys 6 are parallel to each other.

Further, a second pulley 8 is arranged coaxially with one of the first pulleys 6 on the first shaft 7. In particular in this embodiment, the second pulley 8 is arranged coaxially with the first pulley 6 on the side closer to the drill pipe 12 (further from the main machine 101).

Further, the first movable pulley 17 and the second movable pulley 18 are arranged side by side and the arrangement direction is parallel to the length extension direction of the middle mast 3, and the first movable pulley 17 is closer to the upper mast 9 than the second movable pulley 18; i.e. the first movable sheave 17 and the second movable sheave 18 are also arranged vertically side by side when the mast 102 is placed vertically, wherein the first movable sheave 17 is located above the second movable sheave 18.

Further, the axial directions of the first movable sheave 17 and the second movable sheave 18 are parallel and perpendicular to the axial direction of the first sheave 6.

Further, as shown in fig. 4A and 4B, the third pulley 21 is fixed on the lower mast 20 by the third shaft 22, the third pulley 21 is disposed at an angle θ with respect to the lower mast 20, that is, the plane of the third pulley 21 is disposed at an angle θ with respect to the plane of the mast 102 and the drill rod 12, and the third pulley 21 is an offset pulley. Here, θ ranges from 20 ° to 30 °, specifically, for example, 26 °.

In this embodiment, the third pulley 21 and the lower mast 20 are arranged at an included angle, so that the rope outlet angle of the second steel wire rope 19 on the pressurized winch 2 is reduced, and rope disorder is avoided.

When the rotary drilling rig provided by the invention uses the winch pressurization system 100 for pressurization, the pressurization stroke can reach the full stroke of the mast 102 so as to adapt to the operation of lower pile casing. And the rope winding manner of the two steel wire ropes in the hoisting pressurization system 100 can reduce the number of pulleys and the service length of the steel wire rope compared with the traditional rope winding manner (such as the prior art I and the prior art II), thereby saving the cost and reducing the abrasion of the steel wire rope.

The working principle of the rotary drilling rig is as follows:

as shown in fig. 1 and 2, one end of the first wire rope 4 is fixed to the right side of the pressurized winch 2, and after being wound three times counterclockwise, the first wire rope 4 passes through the middle mast 3 and the upper mast 9 upward, then passes around the second pulley 8, the first movable pulley 17 and the first pulley 6, and finally is fixed to the wire rope tensioning cylinder 5. One end of a second steel wire rope 19 is fixed on the left side of the pressurized winch 2, and the second steel wire rope is clockwise wound for three circles, passes through the middle mast 3 and the lower mast 20 downwards, then winds around the third pulley 21 and the second movable pulley 18, and is finally fixed on a rope pressing device 23.

When the rotary drilling rig carries out pressurized drilling operation, the pressurized winch 2 rotates anticlockwise, the second steel wire rope 19 winds the pressurized winch 2, meanwhile, the first steel wire rope 4 starts to be released on the pressurized winch 2, the second steel wire rope 19 sequentially passes through the third pulley 21 and the second movable pulley 18, and the second movable pulley 18 on the power head 16 drives the power head 16 to move downwards under the action of the second steel wire rope 19, so that the drilling pressurized operation is realized. When the rotary drilling rig lifts the power head, the pressurizing winch 2 rotates clockwise, the first steel wire rope 4 winds the pressurizing winch 2, meanwhile, the second steel wire rope 19 starts to release on the pressurizing winch 2, the first steel wire rope 4 sequentially passes through the second pulley 8, the first movable pulley 17 and the first pulley 6, the first movable pulley 17 on the power head 16 drives the power head 16 to move upwards under the action of the first steel wire rope 4, and the power head 16 is pulled out.

Further, when the rotary drilling rig is transported, the first steel wire rope 4 and the second steel wire rope 19 are in a slack state, the power head 16 is placed on the lower mast 20, and the upper mast 9 and the lower mast 20 are folded along the hinged point of the upper mast and the middle mast 3 respectively.

Specifically, the rotary drilling rig needs to go through three steps from the working state (shown in fig. 1) to the transportation state (shown in fig. 5).

Firstly, placing the power head 16 at the lowest position of the lower mast 20, and removing the rope pressing device 23 to remove the second steel wire rope 19 from the lower mast 20 so as to loosen the second steel wire rope 19;

secondly, connecting bolts of the lower mast 20 and the middle mast 3 are removed, and the upper mast 9 and the middle mast 3 are fallen down to enable the height of the mast 102 to meet the transportation height;

and thirdly, removing the connecting bolts of the upper mast 9 and the middle mast 3, rotating the pressurizing winch 2 anticlockwise to loosen the first steel wire rope 4, and folding the upper mast 9 to enable the rotary drilling rig to meet the transportation length.

In a transportation state, the rotary drilling rig only needs to disassemble the fixed end (namely the rope pressing device 23) of the second steel wire rope 19, and does not need to completely disassemble the second steel wire rope 19 and the first steel wire rope 4 on the mast 102; furthermore, the rope winding method of the two steel wire ropes of the hoisting pressurization system 100 adopts the tensioning oil cylinder to be on, and the steel wire rope fixing point (namely the rope pressing device 23) is under, so that the hoisting pressurization system is convenient to disassemble, can reduce the frequency of erecting the mast once by inverting the mast compared with the prior art, is convenient to transport, and increases the convenience of transporting and turning the mast.

The winch pressurization system and the rotary drilling rig with the winch pressurization system are described in detail, specific examples are applied in the description to explain the principle and the implementation mode of the winch pressurization system, and the description of the examples is only used for helping to understand the method and the core idea of the method; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.