A straddle-type four-arm anchor bolt drilling rig for coal mine support

Abstract

This utility model discloses a straddle-type four-arm rock bolt drilling rig for coal mine support, comprising two sets of tracks and a gantry frame straddling the two sets of tracks. Two laterally movable sliding seats are connected to the front and rear sides of the top beam of the gantry frame, each sliding seat being connected to the gantry frame via a lateral power drive assembly. Each lateral sliding seat is connected to a longitudinal sliding seat via a longitudinal power drive assembly, and each longitudinal sliding seat is correspondingly connected to a hydraulic rock bolt drilling arm. Advantages: This utility model employs four relatively independent hydraulic rock bolt drilling arms, enabling lateral, longitudinal, and multi-angle movements to achieve all-round support of the roof and sidewalls, significantly improving support efficiency and scope. The straddle-type compact and lightweight structural design, along with the tracked autonomous movement function, greatly enhances roadway passability, allowing for flexible movement and convenient relocation, adapting to the requirements of rapid relocation and support in continuous mining and filling faces.

Description

Technical Field

[0001] This utility model relates to the technical field of rapid support equipment for coal mine roadways, and in particular to a straddle-type four-arm anchor bolt drilling rig for coal mine support. Background Technology

[0002] In the process of coal mining using continuous mining and filling technology, the geological conditions of the roof of the roadway are highly variable. In order to ensure the safety of the roadway during the support period and prevent safety accidents caused by changes in geological conditions, equipment such as straddle-type anchor bolt drilling rigs and multi-arm anchor bolt drilling rigs are often used for anchor bolt support.

[0003] Currently, continuous mining and charging anchor bolt support equipment mainly includes the following types:

[0004] 1. Double-arm bolt drilling rig: This is a traditional tunneling support equipment that requires alternating spatial operations with mining equipment, resulting in low support efficiency. 2. Multi-arm bolt drilling rig: This equipment is bulky, occupies a large area, has high maintenance costs, and features large hydraulic bolt drilling arms with poor stability and a high failure rate. It cannot be used in conjunction with other equipment and requires alternating spatial operations with mining equipment, leading to insufficient utilization of working hours. 3. Straddle-type bolt drilling rig: The older straddle-type bolt drilling rig is suitable for straddling a roadheader, eliminating the need for alternating spatial operations with the roadheader. However, it suffers from being bulky, difficult to relocate, having average support efficiency, and failing to cover the entire sidewall support. It cannot meet the technical requirements of rapid relocation, rapid excavation, and rapid charging in continuous mining and charging of branch roadways.

[0005] To overcome the shortcomings of existing technologies and solve the technical problems of low working efficiency, bulky equipment, poor roadway throughput, slow relocation speed, poor safety and reliability of personnel working at height, inability to cover the bottom of the side slope, and inability to be used in conjunction with other equipment, this solution provides a straddle-type four-arm anchor drilling rig for coal mine support. Utility Model Content

[0006] The purpose of this utility model is to provide a straddle-type four-arm anchor bolt drilling rig for coal mine support, which solves the technical problems of existing anchor bolt drilling rig support devices having low working efficiency, large hydraulic anchor bolt drilling arm size, poor stability, high failure rate, heavy equipment, poor roadway passage capacity, slow transfer speed, poor safety and reliability of personnel working at height, inability to cover the bottom of the side support, and inability to be used in conjunction with other equipment.

[0007] This utility model is implemented by the following technical solution: a straddle-type four-arm rock bolt drilling rig for coal mine support, which includes a hydraulic rock bolt drilling arm, two sets of walking tracks, and a gantry frame straddling the two sets of walking tracks; two transverse sliding seats are respectively connected to the front and rear sides of the top beam of the gantry frame, and each transverse sliding seat is connected to the gantry frame through a transverse power drive assembly; a longitudinal sliding seat is connected to each transverse sliding seat through a longitudinal power drive assembly, and a hydraulic rock bolt drilling arm is correspondingly connected to each longitudinal sliding seat.

[0008] Furthermore, the gantry frame includes two vertical side beams and a top beam connecting the top ends of the two side beams; the bottom end of each side beam is connected to the top of the frame corresponding to the walking track.

[0009] Furthermore, the lateral power drive assembly has the same structure as the longitudinal power drive assembly, including a base, slide rails, and a telescopic cylinder; two parallel slide rails are fixed to the upper and lower edges of the base, and the telescopic cylinder is provided inside the base, parallel to the slide rails, with the telescopic end of the telescopic cylinder fixedly connected to one end of the base; each telescopic cylinder is connected to a traction mechanism.

[0010] Furthermore, the traction mechanism includes two drive chains symmetrically connected to both sides of the movable telescopic cylinder, each drive chain corresponding to two sprockets rotatably connected to both ends of the cylinder body of the movable telescopic cylinder; one side of the drive chain is fixedly connected to the base, and the other side of the drive chain is connected to the corresponding transverse sliding seat or the longitudinal sliding seat.

[0011] Furthermore, the lateral power drive assembly also includes a lateral extension drive telescopic cylinder. Two opposing lateral guide slots are fixed on the front and rear sides of the top beam of the gantry frame. The base moves between the two corresponding lateral guide slots. The telescopic end of the lateral extension drive telescopic cylinder is connected to the outer end face of the base. The cylinder body of the lateral extension drive telescopic cylinder is hinged to the side wall of the corresponding lateral guide slot.

[0012] Furthermore, it also includes a worm gear assembly, wherein the worm gear shaft of the worm gear assembly is rotatably connected to the longitudinal sliding seat, and the worm gear end face of the worm gear assembly is connected to the side of the hydraulic anchor drill arm through a connecting plate.

[0013] Furthermore, bearing seats are fixed at both ends of the outer side of the connecting plate, and a connecting shaft is rotatably inserted between the two bearing seats. The connecting shaft is fixedly connected to the side of the hydraulic anchor drill arm. An adjusting telescopic cylinder is provided below the bearing seat. The telescopic end of the adjusting telescopic cylinder is hinged to the bottom of the hydraulic anchor drill arm, and the cylinder body end of the adjusting telescopic cylinder is hinged to the connecting plate.

[0014] Compared with the prior art, the advantages of this utility model are: (1) This utility model adopts four relatively independent hydraulic anchor drill arms. The hydraulic anchor drill arms adopt a structure design that combines oil cylinders and sprocket chains, which reduces the stroke of the drill arms and the size of the equipment. At the same time, its flexible control design enables the hydraulic anchor drill arms to perform lateral, longitudinal, and rotational movements, realizing all-round support of the roof and sidewalls, and greatly improving the support efficiency and range; (2) The straddle-type compact and lightweight structure design and the tracked autonomous movement function greatly enhance the roadway passability and movement. It is flexible and adaptable to the requirements of rapid site transfer and rapid support in continuous mining and charging working face, and personnel can operate on the ground without climbing to work; (3) It can be used in conjunction with the tunneling machine, temporary support equipment and self-propelled flexible scraper conveyor of the underground special supporting equipment to realize the rapid mining and tunneling operation with parallel tunneling and support; (4) It is equipped with a high-power oil pump motor and an external interface design to realize the function of mobile pump station, providing hydraulic power for the temporary support support of the tunneling face. When used with five joint temporary support equipment, it can realize convenient and efficient temporary support and rapid permanent support. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] Figure 2 This is a side view of the present invention.

[0018] Figure 3 This is a schematic diagram of the connection structure of two hydraulic anchor drill arms on one side of this utility model.

[0019] Figure 4 This is a schematic diagram of the connection structure of the transverse sliding seat, transverse power drive assembly, and transverse guide groove described in this utility model.

[0020] The components in the attached diagram are labeled as follows: 1. Tracked vehicle; 2. Portal frame; 2.1. Top beam; 2.2. Side beam; 3. Lateral sliding seat; 4. Lateral power drive assembly; 4.1. Base; 4.2. Slide rail; 4.3. Telescopic cylinder; 4.4. Traction mechanism; 4.4. Drive chain; 4.41. Sprocket; 4.42. Lateral extension drive telescopic cylinder; 4.5. Longitudinal power drive assembly; 5. Longitudinal sliding seat; 6. Hydraulic anchor drill arm; 7. Lateral guide groove; 8. Worm gear assembly; 9. Motor; 10. Connecting plate; 11. Bearing seat; 12. Connecting shaft; 13. Adjustable telescopic cylinder; 14. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "front", "rear", "top", "bottom", "left", "right", "vertical", "horizontal", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] like Figures 1 to 4 As shown, this embodiment provides a straddle-type four-arm anchor bolt drilling rig for coal mine support, which includes a hydraulic anchor bolt drilling arm 7. Its structure is the existing anchor bolt drilling rig device, and those skilled in the art can clearly understand the structure from the prior art; for example, in the patent application number 200410012564.3 entitled "Self-moving Anchor Bolting Machine", the anchor bolt drilling rig device includes a gantry, chain, drill box and other related components, and the specific structure will not be described in detail.

[0024] It also includes two sets of walking tracks 1 and a gantry frame 2 spanning the two sets of walking tracks 1; the gantry frame 2 includes two vertical side beams 2.2 and a top beam 2.1 connecting the tops of the two side beams 2.2; the bottom end of each side beam 2.2 is connected to the top of the frame of the corresponding walking track 1; the side beams 2.2 and the top beam 2.1 are the main supporting structures. This straddle-type four-arm anchor bolt drilling rig is equipped with a self-propelled flexible scraper conveyor. Due to the reduced height of the rear straddle equipment, the height and size of the four-arm drilling rig straddle-type body are reduced, realizing a miniaturized and lightweight straddle-type body design. It can move independently using the walking tracks and can work in conjunction with temporary support equipment and scraper conveyors. It features miniaturized equipment, flexible movement, convenient relocation, and personnel ground operation. The walking tracks 1 greatly enhance the roadway passability of this straddle-type four-arm anchor bolt drilling rig, making it flexible and convenient to relocate.

[0025] The side beams of the gantry frame 2 are equipped with high-power hydraulic oil pumps for providing power. The hydraulic oil pumps are existing technology and include an oil tank assembly, a connecting valve assembly, and a pump station assembly. The oil tank assembly is installed inside the top beam, while the connecting valve assembly and the pump station assembly are installed inside the side beams on both sides. The oil tank assembly includes a hydraulic air filter, a suction filter, a hydraulic oil tank, a hydraulic oil tank cooling pipe, and a return oil pipe. The connecting valve assembly includes a head valve, an intermediate valve, a valve handle, a tail valve, and a pressure gauge. Unlike existing technology, in this embodiment, the high-pressure oil pump's supply and return pipelines are equipped with external ports, which can meet the power supply needs of five combined temporary support equipment or other hydraulic equipment, and can realize the function of a mobile pump station.

[0026] Two transverse sliding seats 3, arranged in a row, are connected to the front of the top beam 2.1 of the gantry frame 2. Two transverse sliding seats 3, also arranged in a row, are connected to the rear of the top beam 2.1 of the gantry frame 2. The movement direction of the transverse sliding seats 3 is perpendicular to the movement direction of the traveling track 1. Each transverse sliding seat 3 is connected to the gantry frame 2 via a corresponding set of transverse power drive components 4. Each set of transverse power drive components 4 includes a base 4.1, a slide rail 4.2, and a telescopic cylinder 4.3. The base 4.1 is transversely connected to the top beam 2.1 of the gantry frame 2. Two parallel slide rails 4.2 are fixed to the upper and lower edges of the base 4.1. The transverse sliding seats 3 are connected between the two slide rails 4.2 and move along the slide rails 4.2. A telescopic cylinder 4.3, parallel to the slide rails 4.2, is provided inside the base 4.1. The telescopic end of the telescopic cylinder 4.3 is fixedly connected to one end of the base 4.1. During operation, when the telescopic rod of the telescopic cylinder 4.3 extends, the cylinder body of the telescopic cylinder 4.3 moves relative to each other under the reaction force. Each telescopic cylinder 4.3 is connected to a traction mechanism 4.4, which includes two drive chains 4.41 symmetrically connected to both sides of the telescopic cylinder 4.3. Each drive chain 4.41 corresponds to two sprockets 4.42 rotatably connected to both ends of the cylinder body of the telescopic cylinder 4.3. A certain point on the rear side of the drive chain 4.41 is fixedly connected to the base 4.1 through a connector, and the other side of the drive chain 4.41 is connected to the corresponding transverse sliding seat 3. Since a certain point on the rear side of the drive chain 4.41 is fixedly connected to the base 4.1 through a connector, when the cylinder body of the telescopic cylinder 4.3 moves, it will drive the drive chains 4.41 on both sides to rotate, thereby driving the transverse sliding seat 3 to move laterally along the slide rail 4.2.

[0027] Each transverse sliding seat 3 is connected to a longitudinal sliding seat 6 via a longitudinal power drive assembly 5, and each longitudinal sliding seat 6 is connected to a corresponding hydraulic anchor drill arm 7. The structure of the longitudinal power drive assembly 5 is the same as that of the transverse power drive assembly 4, which also includes a base 4.1, a slide rail 4.2, and a telescopic cylinder 4.3. The base 4.1 of the longitudinal power drive assembly 5 is vertically fixed to the corresponding transverse sliding seat 3. When the telescopic cylinder 4.3 of the longitudinal power drive assembly 5 performs telescopic movements, the corresponding drive chain 4.41 drives the longitudinal sliding seat 6 to move up and down, thereby driving the hydraulic anchor drill arm 7 to perform longitudinal lifting and lowering movements. In this way, the four hydraulic anchor drill arms 7 can move to a low position along the slide rail 4.2. Moreover, the miniaturization of this straddle-type four-arm anchor drill rig makes it easier for operators to perform operations such as changing drill rods, without having to climb to a height, and can be operated from the ground, increasing the safety of operators. The hydraulic anchor drill arm adopts a structural design that combines a cylinder and a sprocket chain, reducing the stroke of the drill arm and the size of the equipment, while also providing a flexible control design.

[0028] Unlike the longitudinal power drive assembly 5, the lateral power drive assembly 4 also includes a lateral extension drive telescopic cylinder 4.5. Two horizontally arranged, opposing lateral guide grooves 8 are fixed to the front and rear sides of the top beam 2.1 of the gantry frame 2. The lateral guide grooves 8 are perpendicular to the direction of movement of the walking track 1. The base 4.1 of the lateral power drive assembly 4 moves laterally between the corresponding two lateral guide grooves 8. The telescopic end of the lateral extension drive telescopic cylinder 4.5 is connected to the outer end face of the base 4.1 via a connecting block. The cylinder body of the lateral extension drive telescopic cylinder 4.5 is hinged to the side wall of the corresponding lateral guide groove 8. When the telescopic rod of the lateral extension drive telescopic cylinder 4.5 extends, it can drive the base 4.1 of the lateral power drive assembly 4 to move laterally outward along the lateral guide groove 8, thereby expanding the lateral movement range of the hydraulic anchor drill arm 7 and improving its working range. In other words, the full-width lateral guide groove design increases the movement and support range, increases the stability of the hydraulic anchor drill arm, and reduces the failure rate.

[0029] It also includes a worm gear assembly 9, the worm gear shaft of which is rotatably connected to the longitudinal sliding seat 6. The worm gear end face of the worm gear assembly 9 is connected to the side of the hydraulic anchor drill arm 7 through the connecting plate 11. The worm end of the worm gear assembly 9 is coaxially connected to the motor 10 for transmission. During the process of the motor 10 driving the worm to rotate, it drives the worm gear to rotate synchronously, thereby driving the hydraulic anchor drill arm 7 to rotate. When it rotates to the point where its top is horizontal and facing the side wall, it can support the side wall of the roadway.

[0030] Bearing seats 12 are fixed at both ends of the outer side of the connecting plate 11. A connecting shaft 13 is rotatably inserted between the two bearing seats 12. The connecting shaft 13 is fixedly connected to the side of the hydraulic anchor drill arm 7. An adjusting telescopic cylinder 14 is provided below the bearing seat 12. The telescopic end of the adjusting telescopic cylinder 14 is hinged to the bottom of the hydraulic anchor drill arm 7, and the cylinder end of the adjusting telescopic cylinder 14 is hinged to the connecting plate 11. By controlling the telescopic extension and retraction of the adjusting telescopic cylinder 14, the hydraulic anchor drill arm 7 can be driven to swing around the center line of the connecting shaft 13 to meet the requirements of multi-angle support for anchor bolt inclination.

[0031] During operation, the drilling rig is equipped with five sets of combined temporary support equipment at the front and a self-propelled flexible scraper conveyor for coal discharge at the rear. During support, the straddle-type four-arm bolt drilling rig moves to the rear of the temporary support equipment, with its gantry frame straddling the scraper conveyor. Under the cover of the temporary equipment, it performs permanent support work. The two front drilling arms provide top bolt support, while the two rear drilling arms provide parallel side support, thus enabling rapid tunneling operations with parallel excavation, support, and transportation suitable for continuous mining and filling faces. The hydraulic bolt drilling arms can achieve all-round roadway support in the transverse, longitudinal, and multi-angle directions. It can not only support the roof but also the sides, greatly improving support efficiency and solving the defect of the old straddle-type drilling rigs that could not achieve full coverage support of the roadway.

[0032] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A cross saddle four-boom roof bolter for use in coal mines, comprising a hydraulic roof bolting boom, characterised in that, It also includes two sets of tracks and a gantry fuselage spanning the two sets of tracks; The top beam of the gantry frame is connected to two transverse sliding seats on its front and rear sides respectively, and each transverse sliding seat is connected to the gantry frame through a transverse power drive assembly. Each of the transverse sliding seats is connected to a longitudinal sliding seat via a longitudinal power drive assembly, and each of the longitudinal sliding seats is correspondingly connected to a hydraulic anchor drill arm.

2. The straddle-type four-boom roofbolter for coal mine support according to claim 1, characterized in that, The gantry frame includes two vertical side beams and a top beam connecting the top ends of the two side beams; the bottom end of each side beam is connected to the top of the frame corresponding to the walking track.

3. The straddle-type four-arm anchor bolt drilling rig for coal mine support according to claim 1, characterized in that, The lateral power drive assembly has the same structure as the longitudinal power drive assembly, including a base, slide rails, and a telescopic cylinder; two parallel slide rails are fixed to the upper and lower edges of the base, and the telescopic cylinder is provided inside the base, parallel to the slide rails, with the telescopic end of the telescopic cylinder fixedly connected to one end of the base; each telescopic cylinder is connected to a traction mechanism.

4. The cross saddle four-boom roof bolter of claim 3, wherein, The traction mechanism includes two drive chains symmetrically connected to both sides of the movable telescopic cylinder. Each drive chain corresponds to two sprockets rotatably connected to both ends of the cylinder body of the movable telescopic cylinder. One side of the drive chain is fixedly connected to the base, and the other side of the drive chain is connected to the corresponding transverse sliding seat or the longitudinal sliding seat.

5. The cross saddle four-boom roof bolter of claim 3, wherein, The lateral power drive assembly also includes a lateral extension drive telescopic cylinder. Two lateral guide slots with opposite openings are fixed on the front and rear sides of the top beam of the gantry frame. The base moves between the two corresponding lateral guide slots. The telescopic end of the lateral extension drive telescopic cylinder is connected to the outer end face of the base. The cylinder body of the lateral extension drive telescopic cylinder is hinged to the side wall of the corresponding lateral guide slot.

6. The cross-saddle four-boom roof bolter of any one of claims 1 to 5, wherein: It also includes a worm gear assembly, the worm gear shaft of which is rotatably connected to the longitudinal sliding seat, and the worm gear end face of which is connected to the side of the hydraulic anchor drill arm via a connecting plate.

7. The cross saddle four-boom roof bolter of claim 6, wherein, Bearing seats are fixed at both ends of the outer side of the connecting plate, and a connecting shaft is rotatably inserted between the two bearing seats. The connecting shaft is fixedly connected to the side of the hydraulic anchor drill arm. An adjusting telescopic cylinder is provided below the bearing seat. The telescopic end of the adjusting telescopic cylinder is hinged to the bottom of the hydraulic anchor drill arm, and the cylinder body end of the adjusting telescopic cylinder is hinged to the connecting plate.

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