A follower frame installation structure of a large triangular rotary drilling rig and a drill rod installation method

Abstract

The present invention discloses a follower frame installation structure and drill rod installation method of a large triangular rotary drilling rig, wherein the follower frame installation structure includes an upper mast assembly and a follower frame, and an installation gap is formed between the top of the guide rail of the upper mast assembly and the top surface of the mast; the support and slewing bearing of the follower frame are integrally arranged, and compared with the prior art, four fewer pins are installed, which reduces the failure caused by the wear and breakage of the pins during construction, and avoids the damage to the equipment and construction personnel caused by the pins falling from a high altitude due to breakage. The drill rod installation method of the large triangular rotary drilling rig of the present invention solves the problem of the difficulty of installing the follower frame on the construction site of the rotary drilling rig, and can also further protect the safety of the construction personnel of the rotary drilling rig and avoid the danger of high-altitude operations; compared with the prior art, the present invention not only saves time and labor, but more importantly, the superiority of humanized design and implementation effect has won praise from customers.

Description

Technical Field

[0001] The invention relates to the technical field of pile-driving machinery, and in particular to a follower frame mounting structure of a large triangular rotary drilling rig and a drill rod mounting method. Background Art

[0002] Rotary drilling rigs can be divided into two types due to the different ways of changing the amplitude of the variable amplitude mechanism. The first type is a rotary drilling rig with a parallelogram structure at the variable amplitude; the second type is a rotary drilling rig with a large triangle structure at the variable amplitude. Among them, for the rotary drilling rig with the first type of variable amplitude mechanism, the mast can be tilted backward as a whole to achieve overall transportation during transportation, but due to the limitations of transportation height, width, and weight, this type of structure is only applicable to small and medium-sized rotary drilling rigs, and the disassembly and assembly of the follower frame of this type of drilling rig can be completed on the inverted middle mast, which is very convenient. The second type of rotary drilling rig adopts a large triangle structure at the variable amplitude. The characteristic of this type of rotary drilling rig is that the mast can only be tilted backward to a certain angle (generally within 30°), but can be bent forward to a 90° horizontal position. Due to the characteristics of super-long, super-high, and super-heavy during transportation, it is generally necessary to remove the middle mast, upper mast, hanging anchor frame, and power head drive part, and at the same time, the large triangle part needs to be bent forward. This type of equipment generally belongs to large and super large rotary drilling rigs, but it is very troublesome to install the follower frame. The following will describe it in detail:

[0003] The installation process of the follower frame and drill rod of the traditional and improved large triangular rotary drilling rig. At present, there are generally two forms of installation of the follower frame of this type of rotary drilling rig in the industry: the first form (traditional type) requires the use of other equipment on the construction site, especially the use of aerial work vehicles. When installing the follower frame, the aerial work vehicle will lift the installer to a height of more than 20 meters to install the claws of the follower frame, and then install the drill bucket to perform drilling operations. This method of installation requires high-altitude operations. If the on-site conditions are not perfect, the follower frame cannot be installed, which causes a lot of trouble to the user and is time-consuming, labor-intensive and unsafe. The second form is to design the follower frame as a detachable follower frame. This detachable The mounted follower frame is mainly composed of three parts: a left leg, a right leg and a slewing support. When installing this detachable follower frame, first connect the slewing support of the detachable follower frame to the drill rod, then lift the drill rod until it can be put into the power head drive sleeve, and then connect the drill rod to the drill bucket, and then start drilling to about 17 meters, and then use the auxiliary winch to lift the left and right legs to the follower frame installation position, and the staff climb up the ladder distributed with the vehicle to connect the follower frame before continuing construction. Compared with the first method, this method avoids the use of aerial work vehicles, but it is difficult to meet market demand. Summary of the invention

[0004] The object of the present invention is to provide a follower frame mounting structure of a large triangular rotary drilling rig to solve the problems raised in the background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides a follower frame installation structure of a large triangular rotary drilling rig, comprising an upper mast assembly and a follower frame matched therewith, wherein the upper mast assembly comprises an upper mast and two protruding guide rails respectively arranged on two opposite sides of the upper mast and arranged along the axial direction of the upper mast, and an installation notch for installing the follower frame is formed between the top ends of the two guide rails and the top surface of the upper mast; the follower frame comprises a bracket, a slewing bearing and two claws, and the bracket comprises two legs close to the guide rails when the rotary drilling rig is working, and comprises When the rotary drilling rig is working, the drill rod end near the guide rail is away, the slewing bearing is arranged at the drill rod end near the bracket, and the slewing bearing is used to be connected with the drill rod, and the two claws are respectively arranged at the two legs of the bracket through pins, and the two claws are used to match the guide rail when the follower frame is lifted to the top of the guide rail and the two claws are aligned with the two installation notches. The two grooves on the two claws are used to make the whole follower frame slide downward from the top of the guide rail into the guide rail through the installation notch.

[0006] Furthermore, the bracket is an integral structure, and the bracket and the slewing bearing are integrally arranged or the bracket and the slewing bearing are welded and connected.

[0007] Furthermore, the connecting portion between the bracket and the slewing bearing is not less than half of the circumference of the slewing bearing.

[0008] Furthermore, a guide fillet is provided at the upper end of the guide rail to protect the nylon slide plate of the follower frame.

[0009] The present invention also provides a method for installing a drill rod of a large triangular rotary drilling rig, comprising using the above-mentioned follower frame installation structure, main winch assembly, anchor frame, wire rope, drill rod, power head and lifting device; the installation method comprises the following steps:

[0010] Step S1, connecting the slewing bearing of the follower frame to the top of the drill rod, and connecting the lower end of the lifter to the top of the drill rod;

[0011] Step S2, connecting the wire rope to the upper end of the lifting device, and at the same time lifting the drill rod so that the follower frame does not touch the ground, but the claws are not subjected to force;

[0012] Step S3, the main winch assembly lifts the wire rope, and the rotary drilling rig moves forward slowly according to the on-site situation to avoid friction caused by the relative movement of the bottom end of the drill rod and the ground, and lifts the wire rope until the bottom end of the drill rod is lifted to just above the drive sleeve of the power head;

[0013] Step S4, aligning the claw with the installation notch above the guide rail, lowering the wire rope, and matching the groove of the claw with the raised guide rail, thereby driving the entire follower frame to slide down from the top of the guide rail into the guide rail, thereby completing the installation of the follower frame;

[0014] Step S5, the bottom end of the drill rod is connected and installed with the driving set of the power head (11), and the construction can be started after the drill rod is installed; after the construction work is completed, if the rotary drilling rig needs to be transferred and transported, the process of disassembling the drill rod is exactly the opposite of the installation process.

[0015] Furthermore, in step S1, the slewing bearing is connected to the drill pipe with bolts, and the bolts are tightened to a set torque.

[0016] Furthermore, in step S4, if the claw is not aligned with the mounting notch, the position of the follower frame is adjusted by rotating the drill rod.

[0017] Furthermore, in step S4, the distance between the center of the wire rope at the front end pulley of the anchor frame and the guide rail surface is the same as the distance from the rotation center of the slewing bearing of the follower frame to the guide rail surface, and the distance from the rotation center of the slewing bearing of the follower frame to the guide rail surface is the same as the distance between the center of the driving component sleeve of the power head and the guide rail surface, so that the drill rod can fall into the driving component sleeve of the power head while the claw cooperates with the guide rail.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] (1) The follower frame installation structure of a large triangular rotary drilling rig of the present invention comprises an upper mast assembly and a follower frame, wherein an installation notch for installing the follower frame is formed between the top of the guide rail of the upper mast assembly and the top surface of the mast; the bracket and the slewing bearing of the follower frame are integrally arranged, and compared with the prior art, four fewer pins are installed, thereby reducing the failure caused by the wear and breakage of the pins during construction, and avoiding the damage to the equipment and construction personnel caused by the pins falling from a high altitude due to breakage.

[0020] (2) The drill rod installation method of the large triangular rotary drilling rig of the present invention solves the problem of difficulty in installing the follower frame on the construction site of the rotary drilling rig, and can also further protect the safety of the construction personnel of the rotary drilling rig and avoid the danger of high-altitude operations.

[0021] (3) The drill rod installation method of the large triangular rotary drilling rig of the present invention avoids the cost of using an aerial work vehicle, especially reduces the workload of on-site construction personnel, making the construction of the equipment more secure.

[0022] (4) It usually takes about 4 hours to install the drill pipe using the traditional process, but the installation time of the drill pipe installed by the method of the present invention is shortened to less than 1 hour. The present invention not only saves time and manpower, but more importantly, its humanized design and superior implementation effect have won the reputation and praise of customers.

[0023] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0025] Figure 1 It is a structural schematic diagram of a follower frame of a large triangular rotary drilling rig in the present invention;

[0026] Figure 2 It is a structural schematic diagram of the upper mast assembly of the present invention;

[0027] Figure 3 It is a structural schematic diagram of a large triangular rotary drilling rig of the present invention;

[0028] Figure 4 It is a schematic diagram of the installation method of the drill rod in the present invention;

[0029] Among them, 2. main winch assembly, 4. anchor frame, 5. upper mast assembly, 5.1. upper mast, 5.2. guide rail, 5.2a. guide fillet, 5a. installation notch, 8. wire rope, 9. follower frame, 9.1. bracket, 9.11. support leg, 9.12 near the drill rod end, 9.2. slewing bearing, 9.3. claw, 9.31. groove, 10. drill rod, 11. power head, 12. lifter. DETAILED DESCRIPTION

[0030] The embodiments of the present invention are described in detail below with reference to the accompanying drawings, but the present invention can be implemented in many different ways as defined and covered by the claims.

[0031] See also Figure 1 and Figure 2The invention discloses a follower frame installation structure of a large triangular rotary drilling rig, which comprises an upper mast assembly 5 and a follower frame 9 matched therewith. The upper mast assembly comprises an upper mast 5.1 and two convex guide rails 5.2 respectively arranged on two opposite sides of the upper mast and arranged along the axial direction of the upper mast. The top ends of the two guide rails are respectively connected to the top surface of the upper mast to form an installation notch 5a for installing the follower frame. The follower frame comprises a bracket 9.1, a slewing bearing 9.2 and two claws 9.3. The bracket comprises two guide rails which are close to the guide rails when the rotary drilling rig is working. The support leg 9.11 and the drill rod end 9.12 which is far away from the guide rail when the rotary drilling rig is working, the slewing bearing is arranged at the drill rod end of the support, and the slewing bearing is used to connect with the drill rod 10, and two claws are respectively arranged at the ends of the two legs of the support through the pin shaft. The two claws are used to match the guide rail when the follower frame is lifted to the top of the guide rail and the two claws are aligned with the two installation notches, so that the two grooves 9.31 on the two claws are used to match with the guide rail, so that the entire follower frame slides down from the top of the guide rail through the installation notch into the guide rail. Specifically, the support is an integral structure, and the support and the slewing bearing are integrally arranged or the support and the slewing bearing are welded. In this structural setting, the guide rail is shortened according to the installation requirements of the follower frame, and a guide fillet 5.2a is provided at the top thereof, which further facilitates the installation of the claws and the guide rail. The follower frame assembly of this structure adopts an integral follower frame mode, which reduces the installation of the left and right legs of the follower frame, and at the same time, there is no need for construction personnel to stand on a ladder or work on a power head, thereby ensuring the safety of the assembly environment.

[0032] In a specific embodiment, the portion of the connection between the bracket and the slewing bearing is not less than half of the circumference of the slewing bearing. This structural arrangement ensures a firm connection between the bracket and the slewing bearing, thereby improving the safety performance of the product.

[0033] Combination Figure 3 and Figure 4 A method for installing a drill rod of a large triangular rotary drilling rig includes using a follower frame installation structure, a main winch assembly 2, an anchor frame 4, a wire rope 8, a drill rod 10, a power head 11 and a lifter 12. The follower frame installation structure includes an upper mast assembly 5 and a follower frame 9. The main winch assembly is arranged on a mainframe 1 of the rotary drilling rig. The installation method includes the following steps:

[0034] Step S1, connect the slewing bearing 9.2 of the follower frame 9 of the large triangular rotary drilling rig to the top of the drill rod 10 with bolts, and tighten them to the set torque with a torque wrench, and at the same time connect the lower end of the lifter 12 to the top of the drill rod 10 with a pin shaft;

[0035] Step S2, connect the wire rope 8 to the upper end of the lifting device 12 with a pin, and at the same time slightly lift the drill rod so that the follower frame does not touch the ground, but the claws 9.3 are not subjected to force, and then connect the pin of the grasping part of the follower frame;

[0036] Step S3, the main winch assembly 2 lifts the wire rope 8, and the rotary drilling rig moves forward slowly according to the on-site situation. The purpose of the rotary drilling rig moving forward is to avoid damage to the ground and the drill rod caused by the slide of the drill rod on the ground due to the lifting of the wire rope; the wire rope 8 is lifted until the bottom end of the drill rod 10 is lifted to the top of the driving component sleeve of the power head 11;

[0037] Step S4, align the claw of the follower frame with the installation notch 5a above the guide rail, and lower the wire rope 8. Since the distance between the center of the wire rope at the front end pulley of the anchor frame 4 and the guide rail surface is the same as the distance between the rotation center of the slewing bearing of the follower frame and the guide rail surface, the distance between the rotation center of the slewing bearing of the follower frame and the guide rail surface is the same as the distance between the center of the driving member sleeve of the power head and the guide rail surface, so that when the claw is partially put on the guide rail, the drill rod falls into the driving member sleeve of the power head, and the groove of the claw matches the raised guide rail, so that the entire follower frame can be driven to slide down from the top of the guide rail into the guide rail, thereby completing the installation of the follower frame;

[0038] Step S5, the bottom end of the drill rod is connected and installed with the driving set of the power head 11, the drill rod 10 is installed, and the drill bucket is installed at the bottom end of the drill rod before construction can begin; after the construction work is completed, if it needs to be transferred and transported, the disassembly process is exactly the opposite of the installation process.

[0039] In a specific implementation, in step S4, if the claws are not aligned with the installation notch, the position of the follower frame is adjusted by rotating the drill rod; in this structural setting, although the follower frame has a slewing support, it will still rotate in actual conditions.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for installing a drill rod of a large triangular rotary drilling rig, characterized in that: The invention comprises a follower frame installation structure for a large triangular rotary drilling rig, a main winch assembly (2), an anchor frame (4), a steel wire rope (8), a drill rod (10), a power head (11) and a lifter (12); the follower frame installation structure comprises an upper mast assembly (5) and a follower frame (9) matched therewith, the upper mast assembly comprises an upper mast (5.1) and two convex guide rails (5.2) respectively arranged on two opposite sides of the upper mast and arranged along the axial direction of the upper mast, and a mounting notch (5a) for mounting the follower frame is formed between the top ends of the two guide rails and the top surface of the upper mast; the follower frame comprises a bracket (9.1), a slewing bearing (9.2) and two claws (9.3), the bracket comprises a support (9.1), a slewing bearing (9.2) and two claws (9.3), the support ... The invention comprises two legs (9.11) close to the guide rail when the rotary drilling rig is working, and a drill rod end (9.12) close to the guide rail when the rotary drilling rig is working, the slewing bearing is arranged at the drill rod end close to the bracket, and the slewing bearing is used to be connected with the drill rod (10), and the two claws are respectively arranged at the two legs of the bracket through pins, and the two claws are used to match the guide rail when the follower frame is lifted to the top of the guide rail and the two claws are aligned with the two installation notches, so that the two grooves (9.31) on the two claws are used to make the whole follower frame slide downward from the top of the guide rail into the guide rail through the installation notch; the installation method comprises the following steps: Step S1, connecting the slewing bearing (9.2) of the follower frame (9) to the top end of the drill rod (10), and connecting the lower end of the lifter (12) to the top end of the drill rod (10); Step S2, connecting the steel wire rope (8) to the upper end of the lifting device (12), and at the same time lifting the drill rod so that the follower frame does not touch the ground, but the claw (9.3) is not subjected to force; Step S3, the main winch assembly (2) lifts the wire rope (8), and at the same time, the rotary drilling rig moves forward slowly according to the on-site situation to avoid friction caused by the relative movement between the bottom end of the drill rod and the ground, and lifts the wire rope (8) until the bottom end of the drill rod (10) is lifted to just above the drive sleeve of the power head (11); Step S4, aligning the claw with the installation notch (5a) above the guide rail, lowering the wire rope (8), and matching the groove of the claw with the raised guide rail, thereby driving the entire follower frame to slide down from the top of the guide rail into the guide rail, thereby completing the installation of the follower frame; Step S5, the bottom end of the drill rod is connected and installed with the driving set of the power head (11), and the construction can be started after the drill rod (10) is installed; after the construction work is completed, if the rotary drilling rig needs to be transferred to another site for transportation, the disassembly process of the drill rod is exactly the opposite of the installation process; In the step S4, if the claw is not aligned with the installation notch, the position of the follower frame is adjusted by rotating the drill rod; In step S4, the distance between the center of the wire rope at the front end pulley of the anchor frame (4) and the guide rail surface is the same as the distance between the rotation center of the slewing bearing of the follower frame and the guide rail surface, and the distance between the rotation center of the slewing bearing of the follower frame and the guide rail surface is the same as the distance between the center of the driving member sleeve of the power head and the guide rail surface, so that the drill rod can fall into the driving member sleeve of the power head while the claw cooperates with the guide rail.

2. The installation method according to claim 1, characterized in that: In the step S1, the slewing bearing (9.2) and the drill rod (10) are connected with bolts, and the bolts are tightened to a set torque.

3. The installation method according to claim 1, characterized in that: The bracket is an integral structure, and the bracket and the slewing bearing are integrally arranged or the bracket and the slewing bearing are welded and connected.

4. The installation method according to claim 1, characterized in that: The connected portion between the bracket and the slewing bearing is not less than half of the circumference of the slewing bearing.

5. The installation method according to claim 1, characterized in that: The upper end of the guide rail is provided with a guide fillet (5.2a).

Images