Drilling rig mast structure and rotary drilling rig

Abstract

The invention provides a drilling rig mast structure and a rotary drilling rig, the drilling rig mast structure comprises a mast body and a cathead arranged at the top end of the mast body, an oil cylinder mounting seat and a winch mounting seat are arranged on the mast body, the oil cylinder mounting seat is used for mounting an oil cylinder pressurizing device, and the winch mounting seat is used for mounting a winch pressurizing device. The oil cylinder mounting seat is arranged on one side, close to a drill rod, of the mast body, and the winch mounting seat is arranged on one side, away from the drill rod, of the mast body. The mast structure of the drilling machine is high in universality, can be compatible with the installation of an oil cylinder pressurizing device and a winch pressurizing device, is convenient to operate, and is favorable for reducing the equipment cost.

Description

Technical Field

[0001] The invention relates to the technical field of engineering machinery, and in particular to a drilling rig mast structure and a rotary drilling rig. Background Art

[0002] The rotary drilling rig is a common engineering machinery. The mast is one of the important components of the rotary drilling rig. The mast mainly guides, supports, and transmits power for the drill rod, power head and other components to ensure the accuracy and stability of the drilling operation.

[0003] The mast is equipped with a power head and a power head pressurizing device, which is used to apply downward or upward pressure to the power head. At present, the power head pressurizing device is generally divided into two types: a cylinder pressurizing device and a winch pressurizing device. Among them, the cylinder pressurizing device has a large pressurizing force, but a short stroke, which makes the drilling depth of the drilling tool relatively small; while the winch pressurizing device has a relatively large stroke, and the drilling depth of the drilling tool is relatively large.

[0004] At present, rotary drilling rigs are generally equipped with oil cylinder pressurizing devices. When the drilling depth of the drilling tool needs to be increased, it is necessary to replace a larger rotary drilling rig for drilling operations, or replace the oil cylinder pressurizing device with a winch pressurizing device. However, since the current mast has a relatively single function and poor versatility, the mast can generally only be installed with an oil cylinder pressurizing device. When the oil cylinder pressurizing device needs to be replaced with a winch pressurizing device, the mast can generally only be replaced with a mast that can be installed with a winch pressurizing device, which is inconvenient to operate and increases the difficulty of the replacement operation and the equipment cost. Summary of the invention

[0005] The object of the present invention is to provide a drilling rig mast structure and a rotary drilling rig, aiming to solve or at least partially solve the shortcomings of the above-mentioned background technology. The drilling rig mast structure has high versatility and is compatible with the installation of a cylinder pressurizing device and a winch pressurizing device, thereby facilitating operation and helping to reduce equipment costs.

[0006] The present invention provides a drilling rig mast structure, comprising a mast body and an anchor frame arranged at the top of the mast body, the mast body is provided with a cylinder mounting seat and a winch mounting seat, the cylinder mounting seat is used to install a cylinder pressurizing device, the winch mounting seat is used to install a winch pressurizing device, the cylinder mounting seat is arranged on a side of the mast body close to the drill rod, and the winch mounting seat is arranged on a side of the mast body away from the drill rod.

[0007] Furthermore, the mast body comprises a plurality of sub-masts connected in sequence from top to bottom, and at least two upper and lower adjacent sub-masts are detachably connected, and the length of the mast body can be changed by disassembling and assembling the sub-masts;

[0008] Among the multiple sub-masts, the sub-mast located at the top is the upper mast, and the sub-mast located at the bottom is the lower mast; the anchor frame is detachably connected to the upper mast, and the cylinder mounting seat and the winch mounting seat are at least arranged on the lower mast and / or on the sub-mast that is inseparable from the lower mast.

[0009] Furthermore, among the plurality of sub-masts, every two upper and lower adjacent sub-masts can be detachably connected; and the oil cylinder mounting seat and the winch mounting seat are at least arranged on the lower mast.

[0010] Furthermore, each of the sub-masts is provided with a hinged portion, and the hinged portions of two upper and lower adjacent sub-masts are rotatably connected and detachable.

[0011] Furthermore, the mast body further comprises a connecting portion, the connecting portion being connected between the anchor frame and the upper mast, and the connecting portion being detachably connected to the upper mast;

[0012] An upper pulley block is provided on the connecting portion, and a lower pulley block is provided on the lower mast; the upper pulley block and the lower pulley block are used for passing the pressure rope connected between the winch pressure device and the power head.

[0013] Furthermore, a mounting portion is provided on one side of the mast body away from the drill pipe, and the mounting portion is used to connect a supporting cylinder and / or a steering pulley; the mounting portion is at least arranged on the lower mast and / or on the sub-mast that is inseparable from the lower mast.

[0014] Further, the anchor frame comprises a main frame body and a side frame body connected to each other, the side frame body is located on a side of the main frame body close to the drill rod, a first pulley is provided on the side frame body, and the main frame body is connected to the top end of the mast body; at least the pitch angle of the side frame body relative to the mast body in the anchor frame is adjustable so that the side frame body can be switched between the first position and the second position;

[0015] When the side frame is in the first position, the side frame is located above the drill rod, and the lifting rope passing around the first pulley can be coaxially connected to the drill rod; when the side frame is in the second position, the side frame and the drill rod do not correspond to each other up and down, and the side frame can avoid the drill rod.

[0016] Furthermore, the side frame is fixedly connected to the main frame; the drilling rig mast structure also includes a wedge block, which is used to be installed between the main frame body and the top of the mast body, so that the entire anchor frame can be rotated to a preset angle toward the side away from the drill rod.

[0017] Furthermore, the side frame body and the main frame body are separate structures, and the side frame body and the main frame body are hinged by a hinge structure; a first fixing point is provided on one of the side frame body and the main frame body, and a second fixing point and a third fixing point are provided on the other one at intervals;

[0018] When the first fixed point is connected to the second fixed point by a fixing member, the side frame is fixed at the first position relative to the main frame; when the first fixed point is connected to the third fixed point by the fixing member, the side frame is fixed at the second position relative to the main frame.

[0019] The present invention also provides a rotary drilling rig, comprising the drilling rig mast structure as described above.

[0020] The drilling rig mast structure provided by the present invention simultaneously arranges an oil cylinder mounting seat and a winch mounting seat on the mast body, so that the mast body can be installed with both an oil cylinder pressurizing device and a winch pressurizing device, that is, one mast can meet the installation requirements of different power head pressurizing devices at the same time, thereby improving the versatility of the mast. When switching the power head pressurizing device, it is only necessary to install the required power head pressurizing device on the mounting seat corresponding to the mast body without replacing the mast, thereby facilitating operation and improving construction efficiency. In addition, there is no need to equip multiple masts, which can reduce equipment costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic structural diagram of a rotary drilling rig in an embodiment of the present invention.

[0022] Figure 2 It is a schematic structural diagram of a rotary drilling rig under the condition of oil cylinder pressurization in an embodiment of the present invention.

[0023] Figure 3 It is a schematic structural diagram of a rotary drilling rig under winch pressurization conditions in an embodiment of the present invention.

[0024] Figure 4 It is a schematic structural diagram of a rotary drilling rig under low clearance conditions in an embodiment of the present invention.

[0025] Figure 5 It is a schematic structural diagram of a rotary drilling rig under CFA working conditions in an embodiment of the present invention.

[0026] Figure 6 for Figure 5 Schematic diagram of the connection structure between the middle wedge, the anchor frame and the mast body.

[0027] Figure 7 It is a structural schematic diagram of another embodiment of the present invention when the side frame body is in the first position.

[0028] Figure 8It is a schematic structural diagram of another embodiment of the present invention when the side frame body is in the second position. DETAILED DESCRIPTION

[0029] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0030] The terms "first", "second", "third", "fourth" and the like (if any) in the description and claims of the present invention are used to distinguish similar objects and are not necessarily used to describe a particular sequence or order.

[0031] The directional words such as up, down, left, right, front, back, top, bottom, etc. (if any) involved in the specification and claims of the present invention are defined by the positions of the structures in the drawings and the positions of the structures relative to each other, and are only for the clarity and convenience of expressing the technical solution. It should be understood that the use of directional words should not limit the scope of protection claimed in this application.

[0032] like Figures 1 to 3 As shown, an embodiment of the present invention provides a drilling rig mast structure for a drilling rig, especially for a rotary drilling rig. The drilling rig mast structure includes a mast body 1 and an anchor frame 2 arranged at the top of the mast body 1. A cylinder mounting seat 15 and a winch mounting seat 16 are fixedly provided on the mast body 1. The cylinder mounting seat 15 is used to install a cylinder pressurizing device 3 (i.e., the cylinder pressurizing device 3 can be installed on the cylinder mounting seat 15), and the winch mounting seat 16 is used to install a winch pressurizing device 4 (i.e., the winch pressurizing device 4 can be installed on the winch mounting seat 16). The cylinder mounting seat 15 and the winch mounting seat 16 are respectively arranged on opposite sides of the mast body 1, wherein the cylinder mounting seat 15 is arranged on a side of the mast body 1 close to the drill rod 6 (i.e., a side close to the power head 5), and the winch mounting seat 16 is arranged on a side of the mast body 1 away from the drill rod 6 (i.e., a side away from the power head 5).

[0033] By setting the oil cylinder mounting seat 15 and the winch mounting seat 16, as shown in FIG. Figure 2 As shown, when the rotary drilling rig is in the oil cylinder pressurizing condition, the oil cylinder pressurizing device 3 can be installed on the mast body 1 through the oil cylinder mounting seat 15, and the driving end of the oil cylinder pressurizing device 3 is connected to the power head 5, so that the oil cylinder pressurizing device 3 is used to pressurize the power head 5 (apply downward or upward pressure), thereby pressurizing the drill rod 6; Figure 3As shown, when the rotary drilling rig is in the winch pressurization condition, the winch pressurization device 4 can be installed on the mast body 1 through the winch mounting seat 16, and the winch pressurization device 4 can be connected to the power head 5 through the pressurization rope 43 (the pressurization rope 43 is generally a steel wire rope), so that the winch pressurization device 4 is used to pressurize the power head 5 (apply downward or upward pressure), and then pressurize the drill rod 6. The structure and working principle of the oil cylinder pressurization device 3 and the winch pressurization device 4 can be referred to the existing technology, which will not be repeated here.

[0034] Further, in this embodiment, the oil cylinder mounting seat 15 and the hoisting mounting seat 16 are both fixed to the mast body 1 by welding. Of course, in other embodiments, the oil cylinder mounting seat 15 and the hoisting mounting seat 16 can also be fixed to the mast body 1 by screwing or the like.

[0035] Furthermore, if Figure 1 As shown, in this embodiment, the mast body 1 includes a plurality of sub-masts (not numbered in the figure) connected in sequence from top to bottom, that is, a plurality of sub-masts are connected in pairs; at least some of the upper and lower adjacent sub-masts are detachably connected (for example, by bolts, pins, etc.), and the length of the mast body 1 can be changed by disassembling and assembling the sub-masts.

[0036] Among the multiple sub-masts, the sub-mast at the top is the upper mast 11, and the sub-mast at the bottom is the lower mast 13. The anchor frame 2 is detachably connected to the upper mast 11; the oil cylinder mounting seat 15 and the hoisting mounting seat 16 are at least arranged on the lower mast 13, and / or, the oil cylinder mounting seat 15 and the hoisting mounting seat 16 are at least arranged on the sub-mast that is not detachable from the lower mast 13 (for example, when the middle mast 12 is not detachable from the lower mast 13, the oil cylinder mounting seat 15 and the hoisting mounting seat 16 may also be installed on the middle mast 12 instead of the lower mast 13).

[0037] Specifically, when the rotary drilling rig is operating in a low-headroom condition (i.e., the height of the working space above the rotary drilling rig is relatively small), for example, when the rotary drilling rig is operating in a narrow space such as under a bridge or in a tunnel, in order to make the mast length meet the construction conditions of the low-headroom condition, it is generally necessary to replace the mast with a more compact or shorter design, or to replace it with a smaller rotary drilling rig. This is not only inconvenient to operate and affects construction efficiency, but also increases equipment costs.

[0038] In this embodiment, at least part of the sub-masts in the mast body 1 are configured as detachable structures; Figure 4As shown, when the rotary drilling rig needs to switch to a low-headroom working condition, it is only necessary to remove part of the sub-masts to shorten the length (i.e., height) of the mast body 1, so that the length of the mast body 1 meets the construction requirements under the low-headroom working condition; when it is necessary to increase the length of the mast body 1, it is only necessary to reinstall the removed sub-masts, thereby facilitating operation, improving construction efficiency, and further improving the versatility of the mast, which is conducive to reducing equipment costs.

[0039] At the same time, since the anchor frame 2 is still needed under low clearance conditions, the anchor frame 2 and the upper mast 11 are set as a detachable structure, so that the anchor frame 2 can be separated from the upper mast 11 and directly installed on the undisassembled sub-mast (for example, the middle mast 12 or the lower mast 13), avoiding the problem of needing to be equipped with multiple anchor frames 2.

[0040] At the same time, in order to avoid the problem that the cylinder pressurizing device 3 or the winch pressurizing device 4 cannot be installed on the remaining sub-masts after some sub-masts are removed, the cylinder mounting seat 15 and the winch mounting seat 16 are at least arranged on the lower mast 13 and / or on the sub-mast that is not removable from the lower mast 13. Specifically, since the lower mast 13 is directly connected to the turntable 8, under low clearance conditions, the lower mast 13 will not be removed, and the sub-mast that is not removable from the lower mast 13 (if any) will not be removed either. Therefore, the cylinder mounting seat 15 and the winch mounting seat 16 are at least arranged on the lower mast 13 and / or on the sub-mast that is not removable from the lower mast 13, which can ensure that the cylinder mounting seat 15 and the winch mounting seat 16 are still retained on the sub-mast that has not been removed, so as to facilitate the installation of the cylinder pressurizing device 3 or the winch pressurizing device 4.

[0041] Furthermore, if Figure 1 As shown, in this embodiment, among the multiple sub-masts, each two upper and lower adjacent sub-masts can be detachably connected, so that each sub-mast can be flexibly disassembled according to actual working conditions to meet the height requirements of the lower mast in different usage scenarios. At this time, the cylinder mounting seat 15 and the winch mounting seat 16 are at least arranged on the lower mast 13.

[0042] Specifically, in this embodiment, there are three sub-masts, which are the upper mast 11, the middle mast 12 and the lower mast 13 connected in sequence from top to bottom. The upper mast 11 is detachably connected to the middle mast 12, and the middle mast 12 is detachably connected to the lower mast 13. The cylinder mounting seat 15 is arranged on the lower mast 13 and the middle mast 12, and the winch mounting seat 16 is arranged on the lower mast 13. Of course, in other embodiments, the cylinder mounting seat 15 and the winch mounting seat 16 can also be arranged in other forms, such as the cylinder mounting seat 15 is only arranged on the lower mast 13, or each sub-mast is provided with a cylinder mounting seat 15; for another example, the winch mounting seat 16 is arranged on the lower mast 13 and the middle mast 12, or even each sub-mast is provided with a winch mounting seat 16. In other embodiments, the number of sub-masts can also be two, four, five or more.

[0043] Furthermore, if Figure 1 As shown, in this embodiment, each sub-mast is provided with a hinged portion 10, and when the mast body 1 is folded, the hinged portion 10 can realize the relative rotation of two upper and lower adjacent sub-masts, thereby facilitating the folding of the mast body 1; the hinged portion 10 of each two upper and lower adjacent sub-masts is rotatably connected and detachable, thereby realizing a detachable connection between two adjacent sub-masts.

[0044] Specifically, the mast of the mast body 1 generally has a folding function. A support cylinder 81 is provided between the turntable 8 of the rotary drilling rig and the mast body 1 (i.e., one end of the support cylinder 81 is hinged to the turntable 8, and the other end is hinged to the mast body 1). When the rotary drilling rig is in operation, the support cylinder 81 is extended to support the mast body 1, so that the mast body 1 remains in an upright state; when the rotary drilling rig is not in operation, the support cylinder 81 is shortened to tilt the mast body 1, and then the fixed connection between the two adjacent sub-masts is released (for example, the bolts or pins are removed), and at this time, the hinged parts 10 of the two adjacent sub-masts can rotate relative to each other, that is, at this time, the two adjacent sub-masts can rotate relative to each other, thereby realizing the folding of each sub-mast. In this embodiment, the hinged parts 10 of the adjacent sub-masts are set as a detachable structure, thereby realizing the detachable connection between the sub-masts. In this embodiment, the hinged portion 10 is an ear plate arranged on the side wall of the sub-mast, and the ear plates of two adjacent sub-masts are rotatably connected by a pin shaft, and the pin shaft can be removed from the ear plate, thereby realizing the disassembly connection between the sub-masts and the folding function of the mast.

[0045] Furthermore, if Figure 1 and Figure 3As shown, in this embodiment, the mast body 1 further includes a connecting portion 14, the length (i.e., height) of which is less than the length of each sub-mast, and the connecting portion 14 is connected between the anchor frame 2 and the upper mast 11, and the connecting portion 14 is detachably connected to the upper mast 11. An upper pulley block 41 is provided on the connecting portion 14, and a lower pulley block 42 is provided on the lower mast 13; the upper pulley block 41 and the lower pulley block 42 are used for the pressure rope 43 connected between the hoisting pressure device 4 and the power head 5 to pass around, that is, one end of the pressure rope 43 is connected to the hoisting pressure device 4, and the other end of the pressure rope 43 is connected to the power head 5 after passing around the upper pulley block 41 and the lower pulley block 42, so that the hoisting pressure device 4 can apply downward or upward pressure to the power head 5 through the pressure rope 43.

[0046] Specifically, under low clearance conditions, in order to avoid the problem that the upper pulley block 41 on the mast body 1 is also removed after the upper mast 11 is removed (if the upper pulley block 41 is removed, the winch pressurizing device 4 cannot be used for pressurization, and the upper pulley block 41 needs to be reinstalled), a connecting portion 14 is provided, and the connecting portion 14 and the upper mast 11 are detachable, and the upper pulley block 41 is provided on the connecting portion 14. In this way, when the upper mast 11 needs to be removed, the connecting portion 14 and the upper mast 11 can be directly disassembled and installed on the sub-mast that has not been removed, thereby retaining the upper pulley block 41 on the connecting portion 14. In this embodiment, the lower end of the connecting portion 14 and the upper end of the upper mast 11 are also provided with a hinged portion 10, and the hinged portion 10 on the connecting portion 14 is rotatably connected to the hinged portion 10 on the upper end of the upper mast 11 and is detachable, so that the connecting portion 14 can achieve the functions of folding and disassembling; at the same time, the anchor frame 2 is detachably connected to the connecting portion 14 (for example, by bolts). Of course, in other embodiments, the anchor frame 2 and the connecting portion 14 can also be non-detachably connected. In low clearance conditions, the anchor frame 2 and the connecting portion 14 can be disassembled from the upper mast 11 and then installed on the sub-mast that has not been disassembled.

[0047] Furthermore, if Figure 1 As shown, in this embodiment, a mounting portion 17 is further provided on the side of the mast body 1 away from the drill pipe 6, and the mounting portion 17 is used to connect the supporting cylinder 81 and / or the steering pulley 72; the mounting portion 17 is at least arranged on the lower mast 13 and / or on a sub-mast (if any) that is inseparable from the lower mast 13.

[0048] Specifically, a hoisting device 7 is provided on the turntable 8, and the hoisting device 7 is connected to the drill rod 6 through a suspension rope 71 (the suspension rope 71 is generally a steel wire rope). Specifically, one end of the suspension rope 71 is connected to the hoisting device 7, and the other end of the suspension rope 71 is connected to the drill rod 6 after passing through the steering pulley 72, the second pulley 28 and the first pulley 27 on the anchor frame 2 in sequence. The steering pulley 72 plays a steering role on the suspension rope 71, so that the suspension rope 71 between the steering pulley 72 and the second pulley 28 is in a vertical state. In order to avoid the problem that the support cylinder 81 and / or the steering pulley 72 cannot be installed on the remaining sub-masts after some sub-masts are removed, the installation part 17 is at least provided on the lower mast 13 and / or on the sub-mast that cannot be removed from the lower mast 13.

[0049] In this embodiment, one end of the supporting oil cylinder 81 is hinged to the turntable 8, the other end of the supporting oil cylinder 81 is hinged to the mounting portion 17, the steering pulley 72 is connected to the mounting portion 17, and the supporting oil cylinder 81 and the steering pulley 72 are connected to the same mounting portion 17. Of course, in other embodiments, two mounting portions 17 may also be provided, the supporting oil cylinder 81 is connected to one of the mounting portions 17, and the steering pulley 72 is connected to the other mounting portion 17.

[0050] Furthermore, if Figure 1 and Figure 5 As shown, in this embodiment, the anchor frame 2 includes a main frame body 21 and a side frame body 22 that are interconnected. The side frame body 22 is located on the side of the main frame body 21 close to the drill rod 6, and the main frame body 21 is connected to the top of the mast body 1 (specifically connected to the connecting portion 14). A first pulley 27 is provided on the side frame body 22, and a second pulley 28 is provided on the side of the main frame body 21 away from the drill rod 6, that is, the first pulley 27 and the second pulley 28 are respectively located on the side of the anchor frame 2 close to the drill rod 6 and the side away from the drill rod 6, and the first pulley 27 and the second pulley 28 are used for the suspension rope 71 to pass around. In the anchor frame 2, at least the pitch angle of the side frame body 22 relative to the mast body 1 is adjustable, so that the side frame body 22 can be switched between the first position and the second position; the side frame body 22 can rotate from the first position toward the side away from the drill rod 6 (that is, in Figure 1 In the embodiment, the side frame body 22 rotates clockwise by a preset angle to reach the second position, and the side frame body 22 can be fixed at the first position or the second position respectively.

[0051] like Figure 1 As shown, when the side frame 22 is in the first position, the side frame 22 is located above the drill rod 6 (specifically, it can be directly above or laterally above), and the suspension rope 71 passing around the first pulley 27 can be coaxially connected to the drill rod 6 (that is, the vertical direction of the suspension rope 71 is on the same straight line as the axis of the drill rod 6). Figure 5As shown, when the side frame body 22 is in the second position, the side frame body 22 and the drill rod 6 do not correspond to each other up and down. At this time, the side frame body 22 is located on one side of the drill rod 6 (specifically, the extended drill rod 61) in the horizontal direction. The side frame body 22 can avoid the drill rod 6 (specifically, the extended drill rod 61) to avoid the side frame body 22 and / or the first pulley 27 from interfering with the drill rod 6 (specifically, the extended drill rod 61); at the same time, the lifting rope 71 that bypasses the first pulley 27 can be connected to the power head 5.

[0052] Specifically, if Figures 1 to 4 As shown, when the rotary drilling rig is under the conventional construction method (generally the Kaishi method), the drill rod 6 is located below the anchor frame 2, and the suspension rope 71 needs to be coaxially connected to the drill rod 6. At this time, the drill rod 6 will not interfere with the anchor frame 2 (including the side frame body 22); Figure 5 As shown, when the rotary drilling rig is in CFA (Continuous Flight Auger) working condition, an extended drill rod 61 needs to be installed above the drill rod 6, and the extended drill rod 61 will extend to the position of the anchor frame 2. Since the angle of the anchor frame on the existing mast is fixed, in order to avoid interference between the extended drill rod 61 and the side frame 22, when the rotary drilling rig is switched to CFA working condition, other types of rotary drilling rigs or other masts adapted to the CFA method are generally used, which is not only inconvenient to operate and affects construction efficiency, but also increases equipment costs.

[0053] In this embodiment, the side frame body 22 is configured as a structure with adjustable pitch angle, so that the side frame body 22 can be switched between a first position and a second position, so that the anchor frame 2 can be suitable for both ordinary construction methods and CFA methods, thereby facilitating operation, improving construction efficiency, and further improving the versatility of the mast, which is conducive to reducing equipment costs.

[0054] Furthermore, if Figure 5 and Figure 6 As shown, in this embodiment, the side frame body 22 is fixedly connected to the main frame body 21, and the side frame body 22 and the main frame body 21 are specifically an integrated structure (of course, in other embodiments, the side frame body 22 and the main frame body 21 can also be a split structure, and the two are fixedly connected by welding, screwing, etc.). The drilling rig mast structure also includes a wedge 20, which is used to be installed between the main frame body 21 and the top of the mast body 1, so that the entire anchor frame 2 can be rotated toward the side away from the drill rod 6 by a preset angle, and then the side frame body 22 can be rotated from the first position to the side away from the drill rod 6 by a preset angle to reach the second position. The cross section of the wedge 20 can be roughly triangular, and the height of the cross section of the wedge 20 gradually decreases from the side close to the drill rod 6 to the side away from the drill rod 6, so as to better play a role in raising the side of the anchor frame 2 close to the drill rod 6 and provide a more stable support for the anchor frame 2.

[0055] Specifically, in this embodiment, the main frame 21 is detachably connected to the top of the mast body 1 (specifically, it is detachably connected to the connecting portion 14), and the two can be connected by bolts, so that the main frame 21 and the top of the mast body 1 can be disassembled, and then the wedge 20 can be installed between the two (of course, in other embodiments, the main frame 21 and the top of the mast body 1 can also be rotatably connected, and the wedge 20 can be installed between the two after the main frame 21 is rotated to a certain angle); the wedge 20 can be connected to the main frame 21 and the mast body 1 respectively by bolts. Figure 1 As shown, when the wedge 20 is not installed between the main frame body 21 and the top of the mast body 1, the side frame body 22 is in the first position; Figure 5 and Figure 6 As shown, after the wedge block 20 is installed between the main frame body 21 and the top of the mast body 1, the side of the anchor frame 2 close to the drill rod 6 is raised, so that the entire anchor frame 2 is rotated a certain angle toward the side away from the drill rod 6, so that the side frame body 22 is switched to the second position.

[0056] like Figure 7 and Figure 8 As shown, in another embodiment, the side frame body 22 and the main frame body 21 are separate structures, and the side frame body 22 and the main frame body 21 are hinged by a hinge structure 23; a first fixing point (not shown) is provided on one of the side frame body 22 and the main frame body 21, and a second fixing point 24 and a third fixing point 25 are provided on the other. Figure 7 As shown, when the first fixed point is connected to the second fixed point 24 by the fixing member 26, the side frame body 22 is fixed at the first position relative to the main frame body 21; Figure 8 As shown, when the first fixing point is connected to the third fixing point 25 via the fixing member 26 , the side frame body 22 is fixed at the second position relative to the main frame body 21 .

[0057] Specifically, in this embodiment, the side frame body 22 and the main frame body 21 are partially overlapped, and the hinge structure 23 includes a rotating pin (not numbered in the figure), a first pin hole (not shown in the figure) provided on the side frame body 22, and a second pin hole (not numbered in the figure) provided on the main frame body 21. The rotating pin is inserted into the first pin hole and the second pin hole to realize the rotation of the side frame body 22 and the main frame body 21 (of course, in other embodiments, the hinge structure 23 can also be other structural forms). The first fixed point is a first latch hole provided on the side frame body 22, the second fixed point 24 and the third fixed point 25 are respectively a second latch hole and a third latch hole provided at intervals on the main frame body 21, and the fixing member 26 is a fixing pin; Figure 7As shown, when the first latch hole corresponds to the second latch hole and the fixing pin is inserted into the first latch hole and the second latch hole at the same time, the side frame body 22 is fixed at the first position relative to the main frame body 21; Figure 8 As shown, when the side frame body 22 rotates a certain angle relative to the main frame body 21, the first latch hole corresponds to the third latch hole, and the fixing pin is inserted into the first latch hole and the third latch hole at the same time, the side frame body 22 is fixed at the second position relative to the main frame body 21. Of course, in other embodiments, the second latch hole and the third latch hole may be arranged at intervals on the side frame body 22, and the first latch hole may be arranged on the main frame body 21; the fixing pin may also be replaced by a fixing member such as a bolt.

[0058] Of course, in other embodiments, the anchor frame 2 may also adopt other structural forms with adjustable pitch angles.

[0059] The embodiment of the present invention further provides a rotary drilling rig, comprising the drilling rig mast structure as described above. The rotary drilling rig also includes a chassis 9, a turntable 8 disposed on the chassis 9, a power head 5 slidably disposed on the mast body 1, etc. The bottom end of the mast body 1 is connected to the turntable 8 (generally hinged), and the chassis 9 is a crawler chassis. The specific structure of the rotary drilling rig can be referred to the prior art, and will not be repeated here.

[0060] like Figures 2 to 6 As shown, the method of using the drilling rig mast structure is:

[0061] (1) Figure 2 As shown, when the rotary drilling rig is in the cylinder pressurizing condition, the cylinder pressurizing device 3 is installed on the mast body 1 through the cylinder mounting seat 15, and the driving end of the cylinder pressurizing device 3 is connected to the power head 5, so that the cylinder pressurizing device 3 is used to pressurize the power head 5, and then the drill rod 6 is pressurized.

[0062] (2) Figure 3 As shown, when the rotary drilling rig is in the winch pressurizing condition, the winch pressurizing device 4 is installed on the mast body 1 through the winch mounting seat 16, and the winch pressurizing device 4 is connected to the power head 5 through the pressurizing rope 43, that is, one end of the pressurizing rope 43 is connected to the winch pressurizing device 4, and the other end of the pressurizing rope 43 is connected to the power head 5 after passing over the upper pulley group 41 and the lower pulley group 42, so that the power head 5 is pressurized by the winch pressurizing device 4, and then the drill rod 6 is pressurized.

[0063] (3) Figure 4As shown, when the rotary drilling rig is in a low clearance condition, part of the sub-masts in the mast body 1 are removed (the figure shows that the upper mast 11 and the middle mast 12 are removed; of course, only the upper mast 11 can be removed), and the wedge 20 is generally not installed at this time, and the anchor frame 2 and the connecting part 14 are directly installed on the sub-mast (i.e., the lower mast 13) that has not been removed, thereby shortening the length (i.e., height) of the mast body 1, so that the length of the mast body 1 meets the construction requirements under the low clearance condition. In this condition, winch pressure can be used, and oil cylinder pressure can also be used.

[0064] (4) Figure 5 and Figure 6 As shown in FIG. 1 , when the rotary drilling rig is in the CFA working condition, the anchor frame 2 is disassembled from the top of the mast body 1, and then the wedge block 20 is installed between the anchor frame 2 and the top of the mast body 1, so that the side of the anchor frame 2 close to the drill rod 6 is raised and rotated toward the side away from the drill rod 6 (of course, the same method as shown in FIG. 1 can also be used). Figure 7 and Figure 8 when installing the long screw drilling tool, the anchor frame 2 does not interfere with the drill rod 6, and the upper end of the drill rod 6 can continue to increase the lengthened drill rod.

[0065] The drilling rig mast structure provided by the embodiment of the present invention can install both the cylinder pressurizing device 3 and the winch pressurizing device 4 on the mast body 1 by arranging the oil cylinder mounting seat 15 and the winch mounting seat 16 on the mast body 1; the mast body 1 can be conveniently adjusted in length by arranging the mast body 1 as a structure with multiple detachable sub-masts; the anchor frame 2 can be applied to both ordinary construction methods and CFA methods by arranging the pitch angle adjustable structure. The drilling rig mast structure can simultaneously meet the use conditions of oil cylinder pressurizing conditions, winch pressurizing conditions, low clearance conditions and CFA conditions, has high compatibility and a wide range of applications, can be applied to various construction environments and geological conditions, and is simple and convenient to switch, which can improve construction efficiency; at the same time, it has a high degree of functional integration, can reduce the use of masts of different models, and is easy to maintain and manage, which is conducive to reducing costs.

[0066] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A drilling rig mast structure, comprising a mast body (1) and an anchor frame (2) arranged at the top of the mast body (1), characterized in that: The mast body (1) is provided with a cylinder mounting seat (15) and a winch mounting seat (16); the cylinder mounting seat (15) is used to mount a cylinder pressurizing device (3); the winch mounting seat (16) is used to mount a winch pressurizing device (4); the cylinder mounting seat (15) is arranged on a side of the mast body (1) close to the drill rod (6); and the winch mounting seat (16) is arranged on a side of the mast body (1) away from the drill rod (6).

2. The drilling rig mast structure according to claim 1, characterized in that: The mast body (1) comprises a plurality of sub-masts connected in sequence from top to bottom, and at least two upper and lower adjacent sub-masts are detachably connected, and the length of the mast body (1) can be changed by disassembling and assembling the sub-masts; Among the multiple sub-masts, the sub-mast located at the top is the upper mast (11), and the sub-mast located at the bottom is the lower mast (13); the anchor frame (2) is detachably connected to the upper mast (11), and the cylinder mounting seat (15) and the winch mounting seat (16) are at least arranged on the lower mast (13) and / or on the sub-mast that is inseparable from the lower mast (13).

3. The drilling rig mast structure according to claim 2, characterized in that: Among the plurality of sub-masts, each two upper and lower adjacent sub-masts can be detachably connected; the oil cylinder mounting seat (15) and the winch mounting seat (16) are at least arranged on the lower mast (13).

4. The drilling rig mast structure according to claim 3, characterized in that: Each sub-mast is provided with a hinged portion (10), and the hinged portions (10) of two upper and lower adjacent sub-masts are rotatably connected and detachable.

5. The drilling rig mast structure according to claim 2, characterized in that: The mast body (1) further comprises a connecting portion (14), wherein the connecting portion (14) is connected between the anchor frame (2) and the upper mast (11), and the connecting portion (14) is detachably connected to the upper mast (11); An upper pulley block (41) is provided on the connecting portion (14), and a lower pulley block (42) is provided on the lower mast (13); the upper pulley block (41) and the lower pulley block (42) are used for allowing a pressure rope (43) connected between the winch pressure device (4) and the power head (5) to pass around.

6. The drilling rig mast structure according to claim 2, characterized in that: A mounting portion (17) is also provided on a side of the mast body (1) away from the drill rod (6), and the mounting portion (17) is used to connect a supporting cylinder (81) and / or a steering pulley (72); the mounting portion (17) is at least arranged on the lower mast (13) and / or on the sub-mast that is inseparable from the lower mast (13).

7. The drilling rig mast structure according to any one of claims 1 to 6, characterized in that: The anchor frame (2) comprises a main frame body (21) and a side frame body (22) which are connected to each other, the side frame body (22) is located on a side of the main frame body (21) close to the drill rod (6), a first pulley (27) is provided on the side frame body (22), and the main frame body (21) is connected to the top end of the mast body (1); in the anchor frame (2), at least the side frame body (22) is adjustable in pitch angle relative to the mast body (1), so that the side frame body (22) can be switched between a first position and a second position; When the side frame (22) is in the first position, the side frame (22) is located above the drill rod (6), and the suspension rope (71) passing around the first pulley (27) can be coaxially connected to the drill rod (6); when the side frame (22) is in the second position, the side frame (22) and the drill rod (6) do not correspond to each other up and down, and the side frame (22) can avoid the drill rod (6).

8. The drilling rig mast structure according to claim 7, characterized in that: The side frame body (22) is fixedly connected to the main frame body (21); the drilling rig mast structure also includes a wedge block (20), which is used to be installed between the main frame body (21) and the top of the mast body (1) so that the entire anchor frame (2) can be rotated to a preset angle toward a side away from the drill rod (6).

9. The drilling rig mast structure according to claim 7, characterized in that: The side frame body (22) and the main frame body (21) are separate structures, and the side frame body (22) and the main frame body (21) are hingedly connected via a hinge structure (23); a first fixing point is provided on one of the side frame body (22) and the main frame body (21), and a second fixing point (24) and a third fixing point (25) are provided on the other at intervals; When the first fixed point is connected to the second fixed point (24) via the fixing member (26), the side frame body (22) is fixed at the first position relative to the main frame body (21); when the first fixed point is connected to the third fixed point (25) via the fixing member (26), the side frame body (22) is fixed at the second position relative to the main frame body (21).

10. A rotary drilling rig, characterized in that: It comprises the drilling rig mast structure as claimed in any one of claims 1 to 9.

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