CN204728997U - The fragmentation of hydraulic rotary drilling rig down-the-hole enters rock and bores - Google Patents

Abstract

The name of the utility model is a down-the-hole breaking rock drill for a hydraulic rotary drilling rig, which relates to a rock breaking device suitable for a power head type full hydraulic rotary drilling rig. It is mainly to solve the problem that once the existing power head type full hydraulic rotary drilling rig encounters the rock formation during the drilling process, the drill bit is difficult to enter the rock quickly, the drilling efficiency is low, and it is impossible to realize the one-time impact hole forming of the large-diameter pile hole. Continuous hole bottom slag discharge, slow rock entry speed, serious drill bit wear and high cost. The utility model is equipped with an oil circuit rotary joint assembly on the drill pipe of the rotary drilling rig, the central axis of the rotary joint assembly is connected with the drill pipe through a flange, and the lower end of the rotary joint assembly is connected with the gas lift hard rock drill bit through a vibrator. The utility model introduces percussion drilling when drilling into the rock, and the efficiency of the drilling into the rock is improved. While the vibrator vibrates and hits the drill bit to drill the hole, the gas lift continuous slag discharge of the drilling rig is not changed, and the power head type full hydraulic pressure is realized. The rotary drilling rig has the function of continuous drilling and drilling.

Description

Hydraulic rotary drilling rig down-the-hole crushing and rock drilling

technical field

The utility model relates to a power head type full hydraulic rotary drilling rig, in particular to a down-the-hole crushing rock drill which is suitable for the power head type full hydraulic rotary drilling rig for rock drilling.

Background technique

The power head type full hydraulic rotary drilling rig currently used, once it encounters a rock formation during the drilling process, it is difficult for the original drill bit to enter the rock quickly, and the drilling efficiency is extremely low. The traditional drilling method relies on the grinding of the drill teeth at the bottom of the drill bit. When encountering a rock formation with a hardness of 100 MPa and above, its rock-penetrating speed is only about 1 meter in 10 hours. Although the use of a pneumatic down-the-hole hammer can impact the rock formation, the efficiency is low. The larger the diameter of the pile hole, the higher the cost of the down-the-hole hammer, and it is impossible to realize the one-time impact of a large-diameter pile hole into a hole. Multiple reaming is required. Realize continuous slag discharge at the bottom of the hole, and the rock entry speed is relatively slow.

Contents of the invention

The purpose of the utility model is to solve the above-mentioned deficiencies, and propose a kind of down-the-hole crushing that has large impact force, fast hole forming speed, high drilling efficiency, safety, reliability and low cost. Drill into the rock.

The technical solution of the utility model is: an oil circuit rotary joint assembly is installed on the drill pipe of the rotary drilling rig, the central axis of the rotary joint assembly is connected to the drill pipe through a flange, and the lower end of the rotary joint assembly is connected to the drill bit through a vibrator .

The rotary joint assembly described in the technical solution of the utility model is a moving ring installed on the central shaft. The moving ring is connected to the static ring on its outer circumference through a bearing. The outer side of the turning mechanism is provided with rollers.

The moving ring of the rotary joint assembly described in the technical solution of the utility model is set on the central shaft through the central hole, the lower end of the moving ring is fixed on the central shaft through a dial pin, and the upper end of the moving ring is fixed with bolts through a limit plate on the central axis.

The static ring of the rotary joint assembly described in the technical solution of the utility model is provided with an oil ring groove, and oil passage holes are respectively processed on the static ring and the moving ring, and the oil passage holes are respectively connected with the oil inlet pipe and the oil outlet pipe.

The vibrator described in the technical solution of the utility model includes a vibrator gear box, the vibrator gear box is installed on the transition drill pipe, the outer side of the vibrator gear box is connected in the vibrator outer cover through a rubber shock absorber, and the vibrator The upper end of the outer cover is flanged to the lower flange of the central shaft of the rotary joint assembly, and the lower end of the vibrator gear box is flanged to the gas-lift hard rock drill bit.

The central shaft of the rotary joint assembly described in the technical solution of the utility model is connected with the transition drill rod of the fixed vibrator gearbox through a flexible hose, and the central shaft and the transition drill rod, as well as the central through hole of the flexible hose Evenly divided into inner and outer layers, the inner layer is connected with the slag discharge hole on the drill bit, and the outer layer is connected with the air inlet hole on the drill bit.

The utility model is to add a rotary joint and a hydraulic motor-driven vibrator to the drill pipe of the existing rotary drilling rig to drive the drill bit to perform impact drilling. The rock stratum is broken into gravel powder, and the drilling slag is continuously discharged from the bottom of the hole by means of air lift; the advantages of the utility model are: first, the impact force is large, the impact force of the drill bit can reach more than 350Mpa/cm2, and the hole forming speed is fast; The second is that the rock formation can be broken into powder by vibration and impact, and the drilling slag can be continuously collected and discharged through the gas lift recovery pipeline of the rotary drilling machine to realize continuous drilling without stopping the machine; the third is safe and reliable, and the hydraulic pipeline adopts high-pressure anti- Vibration seal, there is no problem of poor sealing. The vibratory hammer and the vibratory hammer cover are connected by a shock absorber. The pressurized oil cylinder is not affected by the vibration of the vibrating hammer; the fourth is that the anti-rotation mechanism has good anti-rotation effect and fast response speed, and the hydraulic cylinder is used to tighten the wall of the pile hole to realize the reliable anti-rotation of the static ring of the rotary joint.

Description of drawings

Fig. 1 is the supporting schematic diagram of the utility model and rotary drilling rig.

Fig. 2 is a schematic structural view of the utility model.

Detailed ways

As shown in Figures 1 and 2, the drill pipe 15 of the rotary drilling rig 4 of the rotary drilling rig for down-the-hole crushing and rock drilling of the present utility model is equipped with an oil circuit rotary joint assembly 1, and the lower end of the rotary joint assembly 1 passes through the vibrator 2 and The drill bit 3 is connected; the rotary joint assembly 1 is composed of a moving ring 7, a static ring 8 and an anti-rotation mechanism 9. The rotary joint assembly 1 moving ring 7 is a cylinder with a central through hole, and the moving ring 7 is set in the center through the central through hole. On the central shaft 18; the central shaft 18 is a transitional drill pipe, the upper end of the central shaft 18 is connected to the drill pipe 15 of the rotary drilling machine through a flange, and the central through hole on the central shaft 18 is connected to the drilling slag gas lift passage on the drill pipe 15 docking; the static ring 8 is a cylinder with a central through hole, the static ring 8 is set on the outer circumference of the moving ring 7 through the central through hole, and the moving ring 7 is connected with the static ring 8 on the outer circumference of the bearing 17 to ensure its The gap meets the installation requirements of the oil passage seal; the anti-rotation mechanism 9 is arranged on the outer circumference of the static ring 8 of the rotary joint assembly 1, and the anti-rotation mechanism 9 realizes the stop of the static ring 8 of the rotary joint assembly 1 through the pressure of the pressurized oil cylinder to tighten the hole wall. To prevent the oil pipe from being entangled with the rotation of the drill pipe during the drilling process, the outer side of the anti-rotation mechanism 9 is provided with a roller 21, which can slide up and down to tighten the hole wall when the rotary drilling rig of the utility model is broken into the rock and drilled. , to ensure that the rotary drilling rig submersible drill breaks into the rock and drills with the drill pipe during the drilling process. The vertical line given on the outside of the stop mechanism 9 and the roller 21 in Figure 2 indicates the hole wall; the lower end of the moving ring 7 passes through the dial pin 10 Fixed on the central shaft 18, the moving ring 7 can be driven to rotate through the transmission pin 10. The upper end of the moving ring 7 is provided with a limit plate 16, and the limit plate 16 is fixed on the central shaft 18 with bolts; The oil ring groove, the static ring 8 and the moving ring 7 are respectively processed with oil passage holes, and the oil passage holes are respectively connected with the oil inlet pipe and the oil outlet pipe to realize the oil circuit connection between the stationary oil pipe and the dynamic oil pipe, and the oil inlet pipe is connected to the hydraulic pump station 5, The oil outlet pipe is connected to the hydraulic motor of the vibrator 2; the vibrator 2 is composed of a vibrator gearbox 12 and a vibrator cover 19. The center of the vibrator gearbox 12 is hollow, and the hollow part is provided with a gas lift slag discharge pipeline transition drill pipe 20. The lower end of the vibrator gear box 12 is connected to the drill bit 3 through a flange; the vibrator cover 19 and the vibrator gear box 12 are connected with a rubber shock absorber 13, and the rubber shock absorber 13 acts as a shock absorber to reduce vibration The impact on the upper drill pipe and the main engine; in order to prevent the failure of the rubber damping block 13, the vibrator gear box 12 is disengaged from the vibrator cover 19, and the vibrator gear box 12 cannot be taken out at the bottom of the hole. There is a safety bolt between the gear box 12 of the vibrator; the power of the vibrator 2 is driven by a hydraulic motor, which can meet the harsh environment at the bottom of the pile hole; the upper end of the vibrator cover 19 passes through the flange and the lower flange of the central shaft 18 of the rotary joint assembly 1 Connection, the central shaft 18 is connected with the transition drill rod 20 of the fixed vibrator gearbox 12 through a flexible hose 11, the central shaft 18 and the transition drill rod 20, and the central through hole of the flexible hose 11 are equally divided into two layers inside and outside, Corresponding to the slag discharge hole and air intake hole on the drill bit 3, the through hole of the inner layer is connected with the slag discharge hole on the drill bit 3, and the through hole of the outer layer is connected with the air intake hole on the drill bit 3. In order to meet the gas lift slag discharge requirements of the rotary drilling rig, realize continuous slag discharge during drilling, and ensure the smooth flow of the rotary drill slag discharge channel. The hydraulic oil supply of the utility model is provided by the hydraulic pump station 5, and the hydraulic oil pipeline is retracted through the additional oil pipe winch 6 to ensure that there is no looseness of the oil pipe in the hole. The control system of the utility model can be integrated in the control room of the rotary drilling rig Realize centralized control. The utility model relies on the hydraulic motor to drive the vibrator 2 to generate high-frequency exciting force, which drives the drill bit 3 to vibrate up and down. The slag system discharges the rock particles out of the pile hole, and continuous drilling and drilling are realized throughout the drilling process until the construction is completed.

Claims (6)

1. A hydraulic rotary drilling rig for down-the-hole crushing rock drilling, characterized in that an oil circuit rotary joint assembly (1) and a rotary joint assembly (1) are installed on the drill pipe (15) of the rotary drilling rig (4). The central shaft (18) is connected to the drill pipe (15) through a flange, and the lower end of the rotary joint assembly (1) is connected to the drill bit (3) through a vibrator (2). 2. The down-the-hole breaking rock drilling of hydraulic rotary drilling rig according to claim 1, characterized in that: the rotary joint assembly (1) is a moving ring (7) installed on the central shaft (18), and the moving ring (7) The bearing (17) is connected with the static ring (8) on its outer circumference, the outer circumference of the static ring (8) is fixed with a stop mechanism (9), and the outside of the stop mechanism (9) is provided with rollers ( twenty one). 3. The down-the-hole breaking rock drilling of hydraulic rotary drilling rig according to claim 2, characterized in that: the moving ring (7) of the rotary joint assembly (1) is set on the central shaft (18) through the central hole, The lower end of the moving ring (7) is fixed on the central shaft (18) by a dial pin (10), and the upper end of the moving ring (7) is fixed on the central shaft (18) with bolts through a limit plate (16). 4. The down-the-hole breaking rock drilling of hydraulic rotary drilling rig according to claim 2, characterized in that: the static ring (8) of the rotary joint assembly (1) is provided with an oil ring groove, and the static ring (8) Oil passage holes are respectively processed on the moving ring (7), and the oil passage holes are respectively connected with the oil inlet pipe and the oil outlet pipe. 5. The down-the-hole breaking rock drilling of hydraulic rotary drilling rig according to claim 1, characterized in that: the vibrator (2) includes a vibrator gearbox (12), and the vibrator gearbox (12) is installed at the transition On the drill pipe (20), the outer side of the vibrator gear box (12) is connected in the vibrator cover (19) through a rubber shock absorber (13), and the upper end of the vibrator cover (19) is connected to the rotary joint assembly (1 ) of the center shaft (18) are flanged, and the lower end of the vibrator gear box (12) is flanged to the drill bit (3). 6. The down-the-hole breaking rock drilling of hydraulic rotary drilling rig according to claim 1 or 5, characterized in that: the central shaft (18) of the rotary joint assembly (1) and the fixed vibrator gearbox (12) The transition drill pipe (20) is connected by a flexible hose 11, the central shaft (18) and the transition drill pipe (20), and the central through hole of the flexible hose 11 are divided into two layers, the inner layer and the drill bit (3) The slag discharge hole on the top is connected, and the outer layer is connected with the air inlet hole on the drill bit (3).