A swing mechanism of a rotary drilling rig

Abstract

A variable amplitude mechanism of a rotary drilling rig, one end of a movable arm is hinged to a frame, the other end is hinged to a mast; one end of a connecting rod is hinged to the frame, the other end is hinged to one end of a rocker arm, the other end of the rocker arm is hinged to the movable arm; or one end of the rocker arm is hinged to the frame, the other end is hinged to one end of the connecting rod, the other end of the connecting rod is hinged to the movable arm; one end of a variable amplitude hydraulic cylinder is hinged to the frame, the other end is hinged to the rocker arm; one end of a mast hydraulic cylinder is hinged to the mast, the other end is hinged to the movable arm. The application adopts the structure form of connecting the frame and the mast with the movable arm, the movable arm plays a supporting and adjusting role, can bear large torque, has good structural stability, and is suitable for complex and changeable working environment; the application adopts the structure form of hinging the rocker arm, the variable amplitude hydraulic cylinder and the movable arm with the supporting rod or the connecting rod, has the characteristics of being mobile and flexible, and having large variable amplitude range; the application adopts the structure form of hinging the movable arm and the mast with the mast hydraulic cylinder, the whole mast can be folded and laid down, does not need to be assembled and disassembled, the transportation height can be reduced through the variable amplitude hydraulic cylinder, and transportation is facilitated.

Description

Technical Field

[0001] This invention belongs to the field of rotary drilling rig technology, and in particular relates to a variable amplitude mechanism for a rotary drilling rig. Background Technology

[0002] Rotary drilling rigs are a type of engineering machinery commonly used in construction for cyclic drilling operations. They are widely used in foundation construction projects such as municipal engineering, highway bridges, and high-rise buildings, and have become an indispensable piece of machinery in various foundation drilling operations.

[0003] Rotary drilling rigs can rotate 360 ​​degrees for operation. The position of the drill mast is adjusted by the luffing mechanism and the mast cylinder. The luffing mechanism mainly adjusts the mast's position. During the entire operation, the reaction force and reaction torque borne by the drill bit are transmitted to the luffing mechanism through the drill rod and mast, and then transmitted to the ground through the slewing platform and chassis. The luffing mechanism has a decisive influence on the working radius of the entire machine. Therefore, the luffing mechanism of the rotary drilling rig should have a reasonable structural design and overall layout to improve the working performance of the entire machine and make it more reliable and stable.

[0004] Currently, there are two main structural forms of luffing mechanisms for rotary drilling rigs: the first is a parallelogram structure with small triangular blocks, and the second is a large triangular structure. While the parallelogram structure with small triangular blocks offers advantages such as a large luffing range, a foldable mast, and convenient transportation, it also suffers from poor structural stability and an inability to withstand large torques. Conversely, the large triangular structure offers high torsional capacity and good stability, but it is difficult to transport. Summary of the Invention

[0005] To address the problems existing in the prior art, this invention provides a luffing mechanism for a rotary drilling rig. It employs a structure where the boom is directly connected to the chassis and mast, with the boom providing support and adjustment. This mechanism can withstand high torque, exhibits good structural stability, and is suitable for complex and variable working environments. Furthermore, it utilizes a structure where support rods or connecting rods are hinged to the rocker arm and luffing hydraulic cylinder via the boom, offering flexibility and a wide luffing range. Finally, it employs a mast hydraulic cylinder to hinge the boom and mast, allowing the mast to be folded down without disassembly. The luffing hydraulic cylinder also reduces the transport height, facilitating transportation.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a luffing mechanism for a rotary drilling rig, comprising a boom, a connecting rod, a rocker arm, a luffing hydraulic cylinder, and a mast hydraulic cylinder; one end of the boom is hinged to the chassis, and the other end of the boom is hinged to the mast; one end of the connecting rod is hinged to the chassis, and the other end of the connecting rod is hinged to one end of the rocker arm, and the other end of the rocker arm is hinged to the boom; one end of the luffing hydraulic cylinder is hinged to the chassis, and the other end of the luffing hydraulic cylinder is hinged to the rocker arm; one end of the mast hydraulic cylinder is hinged to the mast, and the other end of the mast hydraulic cylinder is hinged to the boom.

[0007] Furthermore, the boom and the luffing hydraulic cylinder are hinged at the same point on the frame.

[0008] A luffing mechanism for a rotary drilling rig includes a boom, a connecting rod, a rocker arm, a luffing hydraulic cylinder, and a mast hydraulic cylinder. One end of the boom is hinged to the chassis, and the other end is hinged to the mast. One end of the rocker arm is hinged to the chassis, and the other end is hinged to one end of the connecting rod, which is also hinged to the boom. One end of the luffing hydraulic cylinder is hinged to the chassis, and the other end is hinged to the rocker arm. One end of the mast hydraulic cylinder is hinged to the mast, and the other end is hinged to the boom.

[0009] Furthermore, the hinge point between the luffing hydraulic cylinder and the frame is horizontally lower than the hinge point between the rocker arm and the frame.

[0010] The luffing mechanism of the aforementioned rotary drilling rig also includes the following technical features:

[0011] The boom, connecting rod, and rocker arm are all arranged as single units.

[0012] Both the luffing hydraulic cylinder and the mast hydraulic cylinder adopt a parallel double-cylinder arrangement.

[0013] The boom, mast hydraulic cylinder, and mast form a stable triangular structure.

[0014] The installation direction of the luffing hydraulic cylinder between the frame and the rocker arm is not limited; when the piston rod end of the luffing hydraulic cylinder is hinged to the frame, the cylinder sleeve end of the luffing hydraulic cylinder is hinged to the rocker arm; when the piston rod end of the luffing hydraulic cylinder is hinged to the rocker arm, the cylinder sleeve end of the luffing hydraulic cylinder is hinged to the frame.

[0015] The beneficial effects of this invention are:

[0016] The luffing mechanism of the rotary drilling rig of this invention adopts a structure in which the boom is directly connected to the frame and the mast. The boom plays a supporting and adjusting role, can withstand large torque, has good structural stability, and is suitable for complex and variable working environments. The structure adopts a support rod or connecting rod that is hinged to the rocker arm and the luffing hydraulic cylinder via the boom, which has the characteristics of being mobile and flexible and having a large luffing range. The structure adopts a structure in which the boom and the mast are hinged by the mast hydraulic cylinder. The mast can be folded down as a whole without disassembly. The luffing hydraulic cylinder can reduce the transportation height, which is convenient for transportation. Attached Figure Description

[0017] Figure 1 This is a structural schematic diagram of the luffing mechanism of a rotary drilling rig according to the present invention (Scheme 1);

[0018] Figure 2 A schematic diagram (Scheme 1) of a rotary drilling rig employing the variable amplitude mechanism (side view) of the present invention;

[0019] Figure 3 A schematic diagram (Scheme 1) of a rotary drilling rig employing the variable amplitude mechanism (rear oblique view) of the present invention;

[0020] Figure 4 This is a schematic diagram of the luffing mechanism of a rotary drilling rig according to the present invention (Scheme 2);

[0021] Figure 5 A schematic diagram (Scheme 2) of a rotary drilling rig employing the variable amplitude mechanism (side view) of the present invention;

[0022] Figure 6 A schematic diagram (Scheme 2) of a rotary drilling rig employing the variable amplitude mechanism (rear oblique view) of the present invention;

[0023] In the diagram, 1—boom, 2—connecting rod, 3—rocker arm, 4—luffing hydraulic cylinder, 5—mast hydraulic cylinder, 6—frame, 7—mast. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0025] like Figures 1-3As shown, a luffing mechanism for a rotary drilling rig includes a boom 1, a connecting rod 2, a rocker arm 3, a luffing hydraulic cylinder 4, and a mast hydraulic cylinder 5. One end of the boom 1 is hinged to a frame 6, and the other end is hinged to a mast 7. One end of the connecting rod 2 is hinged to the frame 6, and the other end is hinged to one end of the rocker arm 3, which is also hinged to the boom 1. One end of the luffing hydraulic cylinder 4 is hinged to the frame 6, and the other end is hinged to the rocker arm 3. One end of the mast hydraulic cylinder 5 is hinged to the mast 7, and the other end is hinged to the boom 1. The boom 1 and the luffing hydraulic cylinder 4 are hinged at the same point on the frame 6. The boom 1, connecting rod 2, and rocker arm 3 are all single-unit configurations. The luffing hydraulic cylinder 4 and the mast hydraulic cylinder 5 are both arranged in a parallel double-cylinder configuration. The boom 1, mast hydraulic cylinder 5, and mast 7 form a stable triangular structure. The installation direction of the luffing hydraulic cylinder 4 between the frame 6 and the rocker arm 3 is not limited; when the piston rod end of the luffing hydraulic cylinder 4 is hinged to the frame 6, the cylinder liner end of the luffing hydraulic cylinder 4 is hinged to the rocker arm 3; when the piston rod end of the luffing hydraulic cylinder 4 is hinged to the rocker arm 3, the cylinder liner end of the luffing hydraulic cylinder 4 is hinged to the frame 6.

[0026] When the rotary drilling rig adopts the above-mentioned luffing mechanism, the extension and retraction of the luffing hydraulic cylinder 4 drives the connecting rod 2 and the rocker arm 3 to swing, thereby causing the boom 1 to swing. The swinging boom 1 then adjusts the front-to-back distance between the mast 7 and the chassis 1. Furthermore, the extension and retraction of the mast hydraulic cylinder 5 drives the mast 7 to swing, thus adjusting the working tilt angle of the rotary drilling rig. When the mast 7 is folded down under the action of the mast hydraulic cylinder 5 and the boom 1, the overall height of the rotary drilling rig is reduced, placing it in a non-working state and facilitating transportation.

[0027] When the mast hydraulic cylinder 5 is locked, the extension and retraction of the luffing hydraulic cylinder 4 causes the mast 7, mast hydraulic cylinder 5, and other components to move closer to or further away from the ground, thus achieving luffing. Furthermore, when the luffing hydraulic cylinder 4 is locked, the extension and retraction of the mast hydraulic cylinder 5 allows the mast 7 to swing around its hinge point with the boom 1, thereby adjusting the angle of the mast 7. Additionally, the extension and retraction of the luffing hydraulic cylinder 4 allows the hinge point between the boom 1 and the mast 7 to be at its furthest point from the chassis 6. The extension and retraction of the mast hydraulic cylinder 5 allows the mast 7 to be in a vertical position. When the mast hydraulic cylinder 5 is extended and locked, rotary drilling operations can begin.

[0028] like Figures 4-6As shown, a luffing mechanism for a rotary drilling rig includes a boom 1, a connecting rod 2, a rocker arm 3, a luffing hydraulic cylinder 4, and a mast hydraulic cylinder 5. One end of the boom 1 is hinged to a frame 6, and the other end is hinged to a mast 7. One end of the rocker arm 3 is hinged to the frame 6, and the other end is hinged to one end of the connecting rod 2, which is also hinged to the boom 1. One end of the luffing hydraulic cylinder 4 is hinged to the frame 6, and the other end is hinged to the rocker arm 3. One end of the mast hydraulic cylinder 5 is hinged to the mast 7, and the other end is hinged to the boom 1. The hinge point between the luffing hydraulic cylinder 4 and the frame 6 is horizontally lower than the hinge point between the rocker arm 3 and the frame 6. The boom 1, connecting rod 2, and rocker arm 3 are all single-unit configurations. The luffing hydraulic cylinder 4 and the mast hydraulic cylinder 5 are both arranged in a parallel double-cylinder configuration. The boom 1, mast hydraulic cylinder 5, and mast 7 form a stable triangular structure. The installation direction of the luffing hydraulic cylinder 4 between the frame 6 and the rocker arm 3 is not limited; when the piston rod end of the luffing hydraulic cylinder 4 is hinged to the frame 6, the cylinder liner end of the luffing hydraulic cylinder 4 is hinged to the rocker arm 3; when the piston rod end of the luffing hydraulic cylinder 4 is hinged to the rocker arm 3, the cylinder liner end of the luffing hydraulic cylinder 4 is hinged to the frame 6.

[0029] When the rotary drilling rig adopts the above-mentioned luffing mechanism scheme, since the rocker arm 3 is hinged to the frame 6, the connecting rod 2 and the luffing hydraulic cylinder 4 respectively, the extension and retraction of the luffing hydraulic cylinder 4 can drive the rocker arm 3 and the connecting rod to swing, thus forming a mechanism similar to a crank rocker. Therefore, the distance between the mast 7 and the frame 6 can be easily adjusted through the extension and retraction of the luffing hydraulic cylinder 4. While positioning the pile hole, the state of the mast 7 during operation and transportation can also be adjusted.

[0030] Because the mast 7, boom 1, and mast hydraulic cylinder 5 form a stable triangular structure, they provide better support while achieving the luffing function, improving the stress state of the luffing mechanism and enhancing the working stability of the rotary drilling rig. When the mast 7 is folded down under the action of the mast hydraulic cylinder 5 and boom 1, the overall height of the rotary drilling rig is reduced, putting it in a non-working state and making it easier to transport.

[0031] The solutions described in the embodiments are not intended to limit the scope of patent protection of this invention. All equivalent implementations or modifications that do not depart from the scope of this invention are included in the patent scope of this case.

Claims

1. A swing mechanism of a rotary drilling rig, characterized by: The boom, the connecting rod, the rocker arm, the luffing hydraulic cylinder and the mast hydraulic cylinder are connected with the frame.

2. A swing mechanism of a rotary excavator, characterized by: The boom, the connecting rod, the rocker arm, the luffing hydraulic cylinder and the mast hydraulic cylinder are connected with the frame.

3. The swing mechanism of a rotary drilling rig according to claim 1 or 2, characterized in that: The boom, the connecting rod and the rocker arm are arranged in a single rod form.

4. The swing mechanism of a rotary drilling rig according to claim 1 or 2, characterized in that: The luffing hydraulic cylinder and the mast hydraulic cylinder are arranged in a parallel double-cylinder form.

5. The swing mechanism of a rotary drilling rig according to claim 1 or 2, wherein: The boom, the mast hydraulic cylinder and the mast form a stable triangular structure.

6. The swing mechanism of a rotary drilling rig according to claim 1 or 2, characterized in that: When the piston rod end of the luffing hydraulic cylinder is connected with the frame, the cylinder sleeve end of the luffing hydraulic cylinder is connected with the rocker arm; when the piston rod end of the luffing hydraulic cylinder is connected with the rocker arm, the cylinder sleeve end of the luffing hydraulic cylinder is connected with the frame.

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