Mining anchor rod drilling machine with multi-stage hollow supporting legs and underneath motor

Abstract

The invention relates to a drilling device, in particular to a mining anchor rod drilling machine with a multistage hollow supporting leg and an underneath motor, which comprises a hydraulic motor, a multistage hydraulic cylinder supporting leg, a drill rod mounting seat, a drill rod and a drill bit which are sequentially and vertically arranged from bottom to top, a transmission shaft is arranged in the multistage hydraulic cylinder supporting leg, and the hydraulic motor drives the drill rod mounting seat through the transmission shaft. The upper bearing and the lower bearing are arranged above and below the multi-stage hydraulic cylinder supporting leg respectively and connected with the upper end and the lower end of the transmission shaft respectively. The hydraulic motor is arranged at the lower part, so that the stability is enhanced, the risk is reduced, and the cost is reduced.

Description

Technical Field

[0001] The invention relates to a mining device, in particular to a mining multi-stage hollow leg motor bottom anchor drill. Background Art

[0002] Among drilling rigs, anchor drilling rigs are widely used, often for drilling and support. Existing anchor drilling rigs generally adopt a design where the outriggers are located at the bottom, while the hydraulic motor and its associated hydraulic system, pipelines, water pipes, valve blocks, valves, and other components are located above the hydraulic legs. This layout leads to a series of problems: First, it causes the anchor drilling rig to have an unfavorable "top-heavy" appearance, with an excessively high center of gravity, which is highly susceptible to tipping accidents. This not only increases the labor intensity of workers but also seriously threatens the safety and health of operators. Second, each operation to lift and place the heavy hydraulic motor and its associated hydraulic system, various pipelines, water pipes, valve blocks, valves, and other components is accompanied by high energy consumption, greatly reducing operational efficiency and economic efficiency. Summary of the Invention

[0003] In view of the deficiencies in the prior art, the present invention provides a mining-used multi-stage hollow leg motor-down anchor drilling rig.

[0004] The technical solution adopted by the present invention is: a mining multi-stage hollow leg motor-mounted anchor drilling rig, including a drill bit and a drill rod, and the drill rod is driven by a hydraulic motor, which is characterized in that a multi-stage hydraulic cylinder leg and a transmission shaft are also installed between the hydraulic motor and the drill rod, and the multi-stage hydraulic cylinder leg and the transmission shaft are both vertically arranged, the hydraulic motor is fixedly installed on the lower end surface of the multi-stage hydraulic cylinder leg, the transmission shaft is arranged inside the multi-stage hydraulic cylinder leg, the lower end of the transmission shaft is connected to the output shaft of the hydraulic motor, and the upper end of the transmission shaft is connected to the drill rod, and the multi-stage hydraulic cylinder leg is also provided with a lower bearing and an upper bearing, and the sleeves of each stage of the multi-stage hydraulic cylinder leg include an inner sleeve and an outer sleeve, the outer ring of the lower bearing is fixedly connected to the inner cylinder of the first-stage sleeve of the multi-stage hydraulic cylinder leg, the inner ring of the lower bearing is fixedly connected to the lower end of the transmission shaft, the outer ring of the upper bearing is fixedly connected to the inner cylinder of the last-stage sleeve of the multi-stage hydraulic cylinder leg, and the inner ring of the upper bearing is fixedly connected to the upper end of the transmission shaft.

[0005] Furthermore, the output shaft of the hydraulic motor is connected to the transmission shaft through a spline interface.

[0006] Furthermore, the upper end portion of the transmission shaft is connected to the drill rod mounting seat through a coupling, and the drill rod is installed in the drill rod mounting seat.

[0007] Furthermore, in the multi-stage hydraulic cylinder support leg, except for the first-stage sleeve, the lower ends of the remaining stages of the sleeve are all provided with limit platforms, and the outer ring surface of the limit platform is provided with a sealing groove.

[0008] Further, the transmission shaft is a multi-stage hexagonal prism transmission shaft.

[0009] Further, through holes for connecting cooling water are arranged inside the transmission shaft.

[0010] The present invention has the following beneficial effects: By placing the hydraulic motor at the lower part and adopting the design of multi-stage hydraulic cylinder legs, drill pipe mounting seats, drill pipes, and drill bits in sequence at the upper part, the upper part of the anchor drill is very light. The hydraulic motor and its hydraulic components, pipelines, water pipes, valve blocks, and valves do not need to be placed at the upper part of the drill. In this way, it is more labor-saving for workers to drill holes, the labor intensity is reduced, and it is not easy to tip over, greatly reducing the probability of workers being injured. At the same time, there is no need to lift and lower the hydraulic motor and its hydraulic components, pipelines, water pipes, valve blocks, and valves each time, so the energy consumption is reduced, the production efficiency is improved, and the production cost is saved. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a perspective view of the present invention; Figure 2 is a front view of the present invention; Figure 3 is the present invention Figure 2 A - A cross-sectional view; Figure 4 is a schematic diagram of the installation structure at the lower end of the transmission shaft of the present invention; Figure 5 is a schematic diagram of the sealing structure of the multi-stage hydraulic cylinder legs and the transmission shaft of the present invention; Figure 6 is a schematic diagram of the installation structure at the upper end of the transmission shaft of the present invention.

[0012] In the figures: 1 - drill bit, 2 - drill pipe, 3 - drill pipe mounting seat, 4 - multi-stage hydraulic cylinder leg, 41 - first-stage sleeve, 42 - second-stage sleeve, 43 - third-stage sleeve, 5 - limit platform, 6 - hydraulic motor, 8 - coupling, 9 - upper bearing, 10 - transmission shaft, 12 - lower bearing, 13 - spline interface. DETAILED DESCRIPTION OF THE INVENTION

[0013] As Figures 1-3As shown in the figure, a mine multi-stage hollow leg motor-downset bolt drill rig includes a hydraulic motor 6, a multi-stage hydraulic cylinder leg 4, a drill pipe mounting seat 3, a drill pipe 2, and a drill bit 1 that are vertically arranged in sequence from bottom to top. The components are firmly installed and connected to each other. The hydraulic motor 6 is fixedly installed on the lower end cover of the multi-stage hydraulic cylinder leg 4. The transmission shaft 10 is arranged inside the multi-stage hydraulic cylinder leg 4. The output shaft of the hydraulic motor 6 is connected to the transmission shaft 10 through a spline interface 13. The transmission shaft 10 is a three-stage hexagonal prism transmission shaft. The multi-stage hydraulic cylinder leg 4 includes a first-stage sleeve 41, a second-stage sleeve 42, and a third-stage sleeve 43. Each stage of the sleeve includes an inner cylinder and an outer cylinder. Among them, a lower bearing 12 is fixedly installed at the lower end of the inner cylinder of the first-stage sleeve 41. The outer ring of the lower bearing 12 is fixedly connected to the inner cylinder of the first-stage sleeve 41, and the inner ring of the lower bearing 12 is fixedly connected to the lower end of the transmission shaft 10, so as to ensure the telescopic movement of the transmission shaft 10 in the vertical direction, as Figure 4 shown. A through hole is provided inside the drill pipe 10 for connecting cooling water. Limiting platforms 5 are respectively provided at the lower ends of the second-stage sleeve 42 and the third-stage sleeve 43. Sealing grooves are provided on the outer ring surfaces of the limiting platforms 5. Sealing members are installed in the sealing grooves to achieve the sealing between the sleeves of each stage. At the same time, the limiting platforms 5 limit the maximum size of the extension of the sleeves. Sealing grooves are also provided between the transmissions of each stage of the transmission shaft 10. Sealing members are installed between the sealing grooves to prevent the leakage of cooling water, as Figure 5 shown.

[0014] An upper bearing 9 is fixedly installed at the upper end of the inner cylinder of the third-stage sleeve 43. The outer ring of the upper bearing 9 is fixedly connected to the inner cylinder of the third-stage sleeve 43, and the inner ring of the upper bearing 9 is fixedly connected to the upper end of the transmission shaft 10, as Figure 6 shown. The upper end of the transmission shaft 10 is connected to the drill pipe mounting seat 3 through a coupling 8. The drill pipe 2 is installed in the drill pipe mounting seat 3. The transmission shaft 10 and the drill pipe 2 are docked inside the drill pipe mounting seat 3, so that the cooling water in the transmission shaft 10 can be introduced into the drill pipe 2. A drill bit 1 is installed at the upper end of the drill pipe 2. Through the above connection, the output shaft of the hydraulic motor 6 drives the drill pipe mounting seat 3 to rotate through the transmission shaft 10, and then drives the drill bit 1 to rotate through the drill pipe 2.

[0015] The multi-stage hydraulic cylinder leg 4 is connected to the hydraulic system. By changing the direction of oil inlet and oil return, its telescopic movement is controlled. Since the two ends of the transmission shaft 10 are respectively connected to the upper bearing 9 and the lower bearing 12, the rotation and transmission of the hydraulic motor 6, the transmission shaft 10, and the drill pipe mounting seat 3 do not affect the multi-stage hydraulic cylinder leg 4, and the transmission shaft 10 and the multi-stage hydraulic cylinder leg 4 telescopic movement synchronously, so that the bolt drill rig can achieve the effect of applying pressure while rotating.

[0016] In this embodiment, the multi-stage hydraulic cylinder outrigger 4 has a three-stage socket structure. When dealing with different sizes, the number of socket stages can be correspondingly improved, while the corresponding transmission structure and sealing structure remain unchanged. The transmission shaft 10 only needs to be a telescopic structure. In this embodiment, in order to ensure the stability and synchronization of the socket structure and facilitate maintenance, the number of stages of the transmission shaft 10 is set to be the same as that of the multi-stage hydraulic cylinder outrigger 4.

[0017] In this embodiment, some seals and oil ports are omitted. All relevant omissions are conventional technical means in the hydraulic field and do not affect the integrity of this embodiment.

Claims

1. A mine multi-stage hollow leg motor-down-mounted roof bolter, comprising a drill bit (1) and a drill pipe (2), wherein the drill pipe (2) is driven by a hydraulic motor (6), and is characterized in that: A multi-stage hydraulic cylinder leg (4) and a transmission shaft (10) are also installed between the hydraulic motor (6) and the drill pipe (2). The multi-stage hydraulic cylinder leg (4) and the transmission shaft (10) are both vertically arranged. The hydraulic motor (6) is fixedly installed on the lower end face of the multi-stage hydraulic cylinder leg (4). The transmission shaft (10) is arranged inside the multi-stage hydraulic cylinder leg (4). The lower end of the transmission shaft (10) is docked with the output shaft of the hydraulic motor (6), and the upper end of the transmission shaft (10) is docked with the drill pipe (2). The multi-stage hydraulic cylinder leg (4) is also provided with a lower bearing (12) and an upper bearing (9). Each stage of the sleeve of the multi-stage hydraulic cylinder leg (4) includes an inner sleeve and an outer sleeve. The outer ring of the lower bearing (12) is fixedly connected to the inner cylinder of the first-stage sleeve of the multi-stage hydraulic cylinder leg (4), and the inner ring of the lower bearing (12) is fixedly connected to the lower end of the transmission shaft (10). The outer ring of the upper bearing (9) is fixedly connected to the inner cylinder of the last-stage sleeve of the multi-stage hydraulic cylinder leg (4), and the inner ring of the upper bearing (9) is fixedly connected to the upper end of the transmission shaft (10).

2. The multi-stage hollow leg roof bolter with the motor placed at the lower part for mine use according to claim 1, wherein: The output shaft of the hydraulic motor (6) is connected to the transmission shaft (10) through a spline interface (13).

3. A mine multi-stage hollow leg motor-downset roof bolter according to claim 1 or 2, characterized in that: The upper end of the transmission shaft (10) is connected to the drill pipe mounting seat (3) through a coupling (8), and the drill pipe (2) is installed in the drill pipe mounting seat (3).

4. A mine multi - stage hollow leg motor - down - placed roof bolter according to claim 1, characterized in that: In the multi-stage hydraulic cylinder leg (4), except for the first-stage sleeve, a limiting platform (5) is provided at the lower part of each of the remaining stages of the sleeve, and a sealing groove is provided on the outer ring surface of the limiting platform (5).

5. A mine multi-stage hollow leg motor-down-mounted roof bolter according to claim 1, characterized in that: The transmission shaft (10) is a multi-stage hexagonal prism transmission shaft.

6. A mine multi-stage hollow leg motor-down-mounted roof bolter according to claim 1 or 5, characterized in that: A through hole for connecting cooling water is provided inside the transmission shaft (10).

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