Chain-type automatic drill rod feeding device and method

Abstract

This invention relates to the technical field of mining anchor drilling rigs, and discloses a chain-type automatic drill rod feeding device and method. This invention uses chains and gears to achieve automatic drill rod feeding for the drilling rig, providing a flexible transition. The principle is simple and easy to operate, achieving continuous drilling operations and significantly improving construction efficiency. Simultaneously, each process involves the cooperation of mechanical equipment, reducing human intervention and improving construction safety while providing a foundation for the subsequent programmed control of the entire construction process. By adjusting the number of gear teeth, diameter, and chain specifications, precise positioning control of the drill rod slot can be achieved, ensuring the drill rod is always in the required position, achieving fixed-point lifting. Furthermore, the drill rod can automatically self-align as the drilling rig rotates, smoothly connecting with the rotating part of the drilling rig and the previous drill rod. The overall mechanism is small in size, does not occupy drilling space, has low labor intensity, high drilling efficiency, and is safe and reliable, making it well-suited for anchor drilling rigs.

Description

Technical Field

[0001] This invention relates to the technical field of mining anchor drilling rigs, and more particularly to a chain-type automatic drill rod feeding device and method. Background Technology

[0002] Tunneling is a crucial step in coal production, and the level of mining technology and its machinery directly impacts the safety and capacity of coal mines. In recent years, with the development of automation and information technology, coal mining capacity has advanced rapidly, with fully automated coal mining faces producing millions or even tens of millions of tons annually emerging. This rapid development of mining technology and equipment necessitates a significant increase in the speed of tunneling to support the coal mining face, further promoting the rapid development of tunneling equipment and technology. Consequently, the automation and information technology levels of coal mine tunneling equipment are increasing, with combined tunneling and bolting units and hydraulic bolt drilling rigs gradually replacing single bolt drilling machines as the main machinery for tunneling and bolting services. This equipment truly achieves simultaneous tunneling and bolting, greatly improving labor efficiency. However, in the rapid tunneling of coal mines in my country, besides the technical performance of the tunneling unit itself, the supporting processes, including tunneling, temporary support, permanent support, transportation, material management, and on-site construction organization, are all important factors affecting the speed of coal mine tunneling. In particular, support operations account for 50% to 60% of the total tunneling cycle time. Through extensive field observation and research, 50% to 60% of the support time is spent on drill rod drilling and retraction. Therefore, it is evident that reducing the drill rod operation time in a single cycle and improving the level of drilling automation can significantly increase the tunneling efficiency per unit time in coal roadways.

[0003] Currently, there are two main methods for supplying drill rods to mining drilling rigs: post-supply and pre-supply. Depending on the working conditions, drill rods need to be frequently installed or removed. This is generally done manually, resulting in repetitive installation and removal, low efficiency, outdated operating methods, high labor intensity, and a significant impact on construction efficiency. Existing mechanized or automated drill rod splicing methods are all pre-supply methods. Their splicing mechanisms are complex, requiring three main components: a lifting frame, a robotic arm, and a double clamping device. The splicing and removal procedures are complex, leading to significant wear on the drill rod joints. How to fully utilize the technical capabilities of drilling equipment, improve automation levels, increase labor efficiency, and reduce labor intensity during the operation of combined tunneling and anchoring units or hydraulic anchor drilling rigs is a current challenge in rapid tunnel excavation. Summary of the Invention

[0004] In view of the problems existing in the above-mentioned chain-type automatic drill rod feeding device and method, the present invention is proposed.

[0005] Therefore, the purpose of this invention is to provide a chain-type automatic drill rod feeding device and method, the purpose of which is: To solve the above-mentioned technical problems, the present invention provides the following technical solution: including, The system includes a motor, a transmission gear connected to the motor via a chain, a transmission rod fixedly mounted coaxially with the transmission gear, two drive gears fixedly connected to the transmission rod and rotating synchronously with it, a front flexible chain and a rear flexible chain respectively meshing with the two drive gears, multiple drill rod slots rigidly connected to the outer sides of the front flexible chain and the rear flexible chain, two driven gears respectively meshing with the front flexible chain and the rear flexible chain, a driven rod passing through the center of the two driven gears and fixedly connected to them, two support frames for supporting the driven rod and having circular through holes, a lifting cylinder fixedly mounted on a base and supporting the motor and support frames on top, a drill rod placed in the drill rod slot, a drilling machine for docking and advancing the drill rod, a slide rail for moving the rotating part of the drilling machine back and forth, and a clamp for holding the drill rod during the rod feeding process.

[0006] As a preferred embodiment of the chain-type automatic drill rod feeding device and method of the present invention, the front flexible chain has a width of 5cm and is used to support the drill rod, and its length can be adjusted according to actual needs.

[0007] In a preferred embodiment of the chain-type automatic drill rod feeding device and method of the present invention, the rear flexible chain has a width of 25cm and is used to fix the drill rod, and its length is the same as that of the front flexible chain.

[0008] As a preferred embodiment of the chain-type automatic drill rod feeding device and method of the present invention, the drill rod slot is made of strong elastic steel and has a gourd-shaped open structure, the opening diameter of which is 2-3 mm smaller than the drill rod diameter.

[0009] In a preferred embodiment of the chain-type automatic drill rod feeding device and method of the present invention, the length of the drill rod slot is the same as the width of the flexible chain, the number is 6 to 10, and they are arranged at equal intervals along the front and rear flexible chains.

[0010] In a preferred embodiment of the chain-type automatic drill rod feeding device and method of the present invention, the driven rod achieves fixed rotation through a circular through hole on the support frame, ensuring stable meshing between the driven gear and the flexible chain.

[0011] In a preferred embodiment of the chain-type automatic drill rod feeding device and method described in this invention, the motor is rigidly connected to the top of the lifting cylinder and moves up and down synchronously with the lifting cylinder to ensure that the transmission system works normally at different heights.

[0012] As a preferred embodiment of the chain-type automatic drill rod feeding device and method of the present invention, the gripper is disposed at the axial position after the drill rod is raised to the top of the mechanism, and is used to temporarily clamp the drill rod before docking with the drilling rig to prevent it from shifting or falling off.

[0013] The present invention also provides a method of use.

[0014] This invention provides the following technical solution: a method of use, comprising the aforementioned chain-type automatic drill rod feeding device and method, the method comprising the following steps: S1: Start the motor to rotate the transmission gear, the transmission rod drives the drive gear to rotate, the front flexible chain and the rear flexible chain rotate accordingly, driving the drill rod chuck containing the drill rod to the top of the mechanism, and then turn off the motor; S2: Turn on the lifting cylinder lifting switch, inject hydraulic oil into the cylinder to raise it to the maximum stroke height. At this time, the center of the drill rod, the center of the rotating part of the drilling machine, and the center of the borehole are on the same straight line. S3: Turn on the chuck switch to close the chuck and clamp the drill rod tightly; turn on the drilling machine, and the rotating part of the drilling machine will slowly rotate forward along the slide rail and gradually clamp the tail of the drill rod; then turn on the lifting cylinder lowering switch to release the hydraulic oil and lower it to its original position, thereby disengaging the drill rod from the drill rod slot. S4: Close the gripper switch to reset it. The drill rod rotates and moves forward synchronously with the drilling rig to start drilling. When the first section of the drill rod has completely entered the rock mass, the rotating part of the drilling rig retracts and separates from the drill rod, and continues to retract along the slide rail to the initial position. S5: Start the motor. The flexible chain rotates and drives the second drill rod slot containing the drill rod to the top of the mechanism. Repeat steps S~S to automatically align and connect the front end of the new drill rod with the tail end of the previous drill rod. Start the drilling machine to rotate and begin drilling. S6: Repeat step S5 until the borehole reaches the designed depth; when the number of drill rods on the device is insufficient, add drill rods from the idle drill rod slots to achieve continuous construction.

[0015] The beneficial effects of this invention are as follows: This invention uses chains and gears to achieve automatic feed of drill rods for the drilling rig, providing a flexible transition. The principle is simple and easy to operate, achieving continuity in drilling operations and significantly improving construction efficiency. Simultaneously, each process involves the cooperation of mechanical equipment, reducing human intervention and improving construction safety while providing a foundation for the subsequent programmed control of the entire construction process. By adjusting the number of gear teeth, diameter, and chain specifications, precise positioning control of the drill rod slot can be achieved, ensuring the drill rod is always in the required position, achieving fixed-point lifting. Furthermore, the drill rod can automatically self-align as it rotates with the drilling rig, smoothly connecting with the rotating part of the drilling rig and the previous drill rod. The overall mechanism is small in size, does not occupy drilling space, has low labor intensity, high drilling efficiency, is safe and reliable, and has good applicability to tunneling and anchoring rigs. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein: Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0017] Figure 2 This is a schematic diagram of the transmission gear connection structure of the present invention.

[0018] In the diagram: 1. Motor; 2. Transmission gear; 3. Transmission rod; 4. Drive gear; 5. Front flexible chain; 6. Rear flexible chain; 7. Drill rod slot; 8. Driven gear; 9. Driven rod; 10. Support frame; 11. Lifting cylinder; 12. Base; 13. Drill rod; 14. Drill rig; 15. Slide rail; 16. Clamping jaw. Detailed Implementation

[0019] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0020] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0021] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0022] Secondly, the present invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth. Example

[0023] Reference Figures 1-2 As an embodiment of the present invention, a chain-type automatic drill rod feeding device and method are provided. This device includes... Includes a motor (1), a transmission gear (2) connected to the motor (1) via a chain, a transmission rod (3) coaxially fixedly mounted with the transmission gear (2), two drive gears (4) fixedly connected to the transmission rod (3) and rotating synchronously with it, a front flexible chain (5) and a rear flexible chain (6) respectively meshing with the two drive gears (4), multiple drill pipe slots (7) rigidly connected to the outside of the front flexible chain (5) and the rear flexible chain (6), two driven gears (8) respectively meshing with the front flexible chain (5) and the rear flexible chain (6), and a threaded... A driven rod (9) fixedly connected to the center of the two driven gears (8), two support frames (10) for supporting the driven rod (9) and having circular through holes, a lifting cylinder (11) fixedly installed on the base (12) and bearing the motor (1) and the support frame (10) on top, a drill rod (13) placed in the drill rod slot (7), a drilling machine (14) for docking and pushing the drill rod (13), a slide rail (15) for the rotating part of the drilling machine (14) to move back and forth, and a chuck (16) for clamping the drill rod (13) during the rod feeding process.

[0024] Specifically, the front flexible chain (5) is 5 cm wide and is used to support the drill rod (13). Its length can be adjusted according to actual needs.

[0025] Furthermore, the rear flexible chain (6) has a width of 25cm and is used to fix the drill rod (13), and its length is the same as that of the front flexible chain (5).

[0026] Furthermore, the drill rod slot (7) is made of strong elastic steel and has a gourd-shaped open structure, with an opening diameter that is 2-3 mm smaller than the diameter of the drill rod (13).

[0027] Furthermore, the length of the drill pipe slot (7) is the same as the width of the flexible chain, and the number is 6 to 10, and they are arranged at equal intervals along the front flexible chain (5) and the rear flexible chain (6).

[0028] The driven rod (9) is fixed and rotated through the circular through hole on the support frame (10), ensuring that the driven gear (8) meshes stably with the flexible chain.

[0029] Preferably, the motor (1) is rigidly connected to the top of the lifting cylinder (11) and moves up and down synchronously with the lifting cylinder (11) to ensure that the transmission system works normally at different heights.

[0030] It should be noted that the gripper (16) is located at the axial position after the drill rod (13) is raised to the top of the mechanism, and is used to temporarily clamp the drill rod (13) before the drill rig (14) docks, to prevent it from shifting or falling off.

[0031] When in use, start the motor (1) to make the transmission gear (2) rotate, the transmission rod (3) drives the drive gear (4) to rotate, the front flexible chain (5) and the rear flexible chain (6) rotate accordingly, and drive the drill rod chuck (7) containing the drill rod (13) to rise to the top of the mechanism. Then, turn off the motor (1). Turn on the lifting cylinder (11) to inject hydraulic oil to raise it to the maximum stroke height. At this time, the center of the drill rod (13) is on the same straight line as the center of the rotating part of the drilling machine (14) and the center of the borehole. Turn on the chuck (16) switch to make the chuck (16) close and tightly clamp the drill rod (13). Turn on the drilling machine (14). The rotating part of the drilling machine (14) slowly rotates forward along the slide rail (15) and gradually clamps the tail of the drill rod (13). Turn on the lifting cylinder (11) to release the hydraulic oil and lower it to the original position. Position the drill rod (13) so that it is disengaged from the drill rod chuck (7); close the chuck (16) switch to reset it, and the drill rod (13) rotates and moves forward synchronously with the drilling machine (14) to start drilling. When the first section of drill rod (13) is fully inserted into the rock mass, the rotating part of the drilling machine (14) moves backward and separates from the drill rod (13), and continues to move backward along the slide rail (15) to the initial position; start the motor (1), and the flexible chain rotates to drive the second drill rod chuck (7) containing the drill rod (13) to the top of the mechanism. Repeat the above steps, and the rotating part of the drilling machine (14) slowly rotates and moves forward and gradually clamps the tail of the drill rod (13). The front end of the drill rod (13) can automatically find and connect with the tail of the previous drill rod (13). Start the drilling machine (14) to rotate and start drilling. Repeat the above steps until the borehole of the designed depth is drilled. When the number of drill rods (13) on the device is insufficient, drill rods (13) are placed in the idle drill rod slots (7) to carry out continuous construction.

[0032] In summary, this invention uses chains and gears to achieve automatic supply of drill rod (13) to the drilling rig (14), with flexible transition. The principle is simple and easy to operate, achieving continuity of drilling work and greatly improving construction efficiency. At the same time, each process is a coordination between mechanical equipment, reducing human intervention. While improving construction safety, it also provides a foundation for the subsequent programmed control of the entire construction process. By adjusting the number of teeth and diameter of the drive gear (4) or driven gear (8) and the specifications of the front flexible chain (5) and rear flexible chain (6), the precise positioning control of the drill rod slot (7) can be achieved, ensuring that the drill rod (13) is always in the required position and achieving fixed-point lifting. Moreover, the drill rod (13) can automatically adjust itself during the rotation of the drilling rig (14) and smoothly connect with the rotating part of the drilling rig (14) and the previous drill rod (13). Example

[0033] Reference Figures 1-2 This is the second embodiment of the present invention. Unlike the previous embodiment, this embodiment provides a method of use, including a chain-type automatic drill rod feeding device and method, the method comprising the following steps: S1: Start the motor (1) to make the transmission gear (2) rotate, the transmission rod (3) drives the drive gear (4) to rotate, the front flexible chain (5) and the rear flexible chain (6) rotate accordingly, and drive the drill rod slot (7) containing the drill rod (13) to rise to the top of the mechanism, and stop the motor (1). S2: Turn on the lifting cylinder (11) lifting switch, inject hydraulic oil into the cylinder to raise it to the maximum stroke height. At this time, the center of the drill rod (13), the center of the rotating part of the drilling machine (14), and the center of the borehole are on the same straight line. S3: Turn on the chuck (16) switch to close the chuck (16) and clamp the drill rod (13) tightly; turn on the drill (14), the rotating part of the drill (14) slowly rotates forward along the slide rail (15) and gradually clamps the tail of the drill rod (13); then turn on the lifting cylinder (11) lowering switch to release the hydraulic oil and lower it to the original position, so that the drill rod (13) is disengaged from the drill rod chuck (7); S4: Close the chuck (16) switch to reset it, and the drill rod (13) rotates and moves forward synchronously with the drilling machine (14) to start drilling construction; when the first section of drill rod (13) has completely entered the rock mass, the rotating part of the drilling machine (14) moves backward and separates from the drill rod (13), and continues to move backward along the slide rail (15) to the initial position; S5: Start the motor (1), the flexible chain rotates and drives the second drill rod slot (7) containing the drill rod (13) to rise to the top of the mechanism. Repeat steps S2~S4 to make the front end of the new drill rod (13) automatically find and connect with the tail end of the previous drill rod (13). Start the drilling machine (14) to rotate and start drilling construction. S6: Repeat step S5 until the borehole of the designed depth is drilled; when the number of drill rods (13) on the device is insufficient, drill rods (13) are added in the idle drill rod slots (7) to achieve continuous construction.

[0034] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape, and proportions of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of the invention. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structurally equivalent but also equivalent in structure. Other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments without departing from the scope of the invention. Therefore, the invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims. Furthermore, for the purpose of providing a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features not relevant to the currently considered best mode for carrying out the invention, or those features not relevant to implementing the invention) may be omitted.

[0035] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A chain-type automatic drill rod feeding device and method, characterized in that: include, Includes a motor (1), a transmission gear (2) connected to the motor (1) via a chain, a transmission rod (3) coaxially fixedly mounted with the transmission gear (2), two drive gears (4) fixedly connected to the transmission rod (3) and rotating synchronously with it, a front flexible chain (5) and a rear flexible chain (6) respectively meshing with the two drive gears (4), multiple drill pipe slots (7) rigidly connected to the outside of the front flexible chain (5) and the rear flexible chain (6), two driven gears (8) respectively meshing with the front flexible chain (5) and the rear flexible chain (6), and a threaded... A driven rod (9) fixedly connected to the center of the two driven gears (8), two support frames (10) for supporting the driven rod (9) and having circular through holes, a lifting cylinder (11) fixedly installed on the base (12) and bearing the motor (1) and the support frame (10) on top, a drill rod (13) placed in the drill rod slot (7), a drilling machine (14) for docking and pushing the drill rod (13), a slide rail (15) for the rotating part of the drilling machine (14) to move back and forth, and a chuck (16) for clamping the drill rod (13) during the rod feeding process.

2. The chain-type automatic drill rod feeding device and method according to claim 1, characterized in that: The front flexible chain (5) is 5cm wide and is used to support the drill rod (13). Its length can be adjusted according to actual needs.

3. The chain-type automatic drill rod feeding device and method according to claim 2, characterized in that: The rear flexible chain (6) is 25cm wide and is used to fix the drill rod (13). Its length is the same as that of the front flexible chain (5).

4. The chain-type automatic drill rod feeding device and method according to claim 3, characterized in that: The drill rod slot (7) is made of strong elastic steel and has a gourd-shaped open structure. Its opening diameter is 2-3 mm smaller than the diameter of the drill rod (13).

5. The chain-type automatic drill rod feeding device and method according to claim 4, characterized in that: The length of the drill pipe slot (7) is the same as the width of the flexible chain, and the number is 6 to 10, and they are arranged at equal intervals along the front flexible chain (5) and the rear flexible chain (6).

6. The chain-type automatic drill rod feeding device and method according to claim 5, characterized in that: The driven rod (9) achieves fixed rotation through the circular through hole on the support frame (10), ensuring stable meshing between the driven gear (8) and the flexible chain.

7. The chain-type automatic drill rod feeding device and method according to claim 6, characterized in that: The motor (1) is rigidly connected to the top of the lifting cylinder (11) and moves up and down synchronously with the lifting cylinder (11) to ensure that the transmission system works normally at different heights.

8. The chain-type automatic drill rod feeding device and method according to claim 7, characterized in that: The gripper (16) is positioned at the axial position after the drill rod (13) is raised to the top of the mechanism, and is used to temporarily clamp the drill rod (13) before the drill rig (14) docks, to prevent it from shifting or falling off.

9. A method of use, characterized in that: The chain-type automatic drill rod feeding device and method according to any one of claims 1 to 8, wherein the method includes the following steps: S1: Start the motor (1) to make the transmission gear (2) rotate, the transmission rod (3) drives the drive gear (4) to rotate, the front flexible chain (5) and the rear flexible chain (6) rotate accordingly, and drive the drill rod slot (7) containing the drill rod (13) to rise to the top of the mechanism, and stop the motor (1). S2: Turn on the lifting cylinder (11) lifting switch, inject hydraulic oil into the cylinder to raise it to the maximum stroke height. At this time, the center of the drill rod (13), the center of the rotating part of the drilling machine (14), and the center of the borehole are on the same straight line. S3: Turn on the chuck (16) switch to close the chuck (16) and clamp the drill rod (13) tightly; turn on the drill (14), the rotating part of the drill (14) slowly rotates forward along the slide rail (15) and gradually clamps the tail of the drill rod (13); then turn on the lifting cylinder (11) lowering switch to release the hydraulic oil and lower it to the original position, so that the drill rod (13) is disengaged from the drill rod chuck (7); S4: Close the chuck (16) switch to reset it, and the drill rod (13) rotates and moves forward synchronously with the drilling machine (14) to start drilling construction; when the first section of drill rod (13) has completely entered the rock mass, the rotating part of the drilling machine (14) moves backward and separates from the drill rod (13), and continues to move backward along the slide rail (15) to the initial position; S5: Start the motor (1), the flexible chain rotates and drives the second drill rod slot (7) containing the drill rod (13) to rise to the top of the mechanism. Repeat steps S2~S4 to make the front end of the new drill rod (13) automatically find and connect with the tail end of the previous drill rod (13). Start the drilling machine (14) to rotate and start drilling construction. S6: Repeat step S5 until the borehole of the designed depth is drilled; when the number of drill rods (13) on the device is insufficient, drill rods (13) are added in the idle drill rod slots (7) to achieve continuous construction.

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