WO2012068771A1

WO2012068771A1 - Impact-type hydraulic rock drilling machine

Info

Publication number: WO2012068771A1
Application number: PCT/CN2011/000344
Authority: WO
Inventors: 唐忠盛
Original assignee: Tang Zhongsheng
Priority date: 2010-11-22
Filing date: 2011-03-03
Publication date: 2012-05-31

Abstract

An impact-type hydraulic rock drilling machine includes an impact mechanism, a rotating mechanism and a flushing mechanism. The impact mechanism is composed of hydraulic motors (3,6), a shock excitation box (1), eccentric shafts (4,8), gears (2,7) and eccentric blocks (4,9), and the bottom of the shock excitation box (1) fits an impact hammer head (10). The rotating mechanism is composed of a third hydraulic motor (22), a rotating box (11), a drive gear (23), a rotating gear (25) and a drill tail (13). The drive gear (23) and the rotating gear (25) are arranged in the rotating box (11), and the rotating gear (25) is tightly housed on the drill tail (13). The shaft of the drive gear connects with the third hydraulic motor (22). The top of the rotating box (11) is connected to the shock excitation box (1) via symmetrically arranged guide rods (18), an upper spring (14), the shock excitation box (1) and a lower spring (24) are housed on each guide rod (18) from the top down. The flushing mechanism is housed on the drill tail (13) extending from the bottom of the rotating box (11). The impact-type hydraulic rock drilling machine has a simple structure, a large impact force, and the impact frequency and the impact force are steplessly adjustable.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the field of construction machinery, and more particularly to an impact hydraulic rock drill. Background technique

Since 1970, Montabert of France successfully developed the first hydraulic rock drill for mine drilling and its associated drilling rigs, hydraulic rock drills have gradually replaced due to their high energy efficiency, high rock drilling speed, low environmental pollution and easy automation. Pneumatic and electric rock drills, hydraulic rock drilling technology has been widely promoted in many fields such as foreign mines, hydropower, tunnel traffic and so on.

The current hydraulic rock drill works by using the differential pressure to force the impact piston to reciprocate at high speed in the cylinder to impact the drill rod to break the rock. For example, the Chinese patent application number is

"200780041358", the name is "rock drilling method and rock drilling machine"; Chinese patent application number is

"200910075110", the name is "automatic hydraulic reverse drilling rock drill" and so on. Since the piston is subjected to high-speed impact movement under the action of high pressure, the structural requirements of the front and rear guide sleeves for the cylinder sealing structure and the supporting piston movement are very high, and the requirements for the processing and processing precision of the impact piston, the shank and the guide sleeve are very high. Therefore, the current hydraulic rock drill has high manufacturing cost and high maintenance cost. However, China's basic industrial level is relatively backward compared with foreign developed countries. Due to the limitations of R&D and manufacturing level and processing technology, the quality stability of domestic hydraulic rock drills is poor, and the overall performance is not satisfactory. Due to cost factors and the quality of domestically produced products, most of the mines in China, especially small and medium-sized mines, are still using gas. Rock drilling equipment

SUMMARY OF THE INVENTION The technical problem to be solved by the present invention is to provide an impact hydraulic rock drill with simple structure, low manufacturing cost, high work efficiency and simple maintenance. The present invention solves the above technical problems in the following technical solutions:

The impact hydraulic rock drill of the present invention comprises an impact mechanism, a rotating mechanism and a flushing mechanism, the impact mechanism is arranged at the upper part, the rotating mechanism is arranged at the middle part, and the washing mechanism is arranged at the lower part; the impact mechanism is composed of a hydraulic motor, an excitation box body, an eccentric shaft, a gear and The eccentric block is configured to have at least four eccentric shafts mounted on the excitation box body, wherein half of the eccentric shafts are arranged side by side in the upper part of the excitation box body to form an upper eccentric group, and the other half of the eccentric shafts are arranged side by side in the lower part of the excitation box body. Forming the lower eccentric group, all the eccentric shafts are equipped with eccentric blocks and gears, the gears of the upper eccentric group mesh with each other, the gears of the lower eccentric group mesh with each other, and an eccentric shaft of the upper eccentric group is connected with the first hydraulic motor, and the lower layer is eccentric An eccentric shaft is connected to the second hydraulic motor in the group; an impact hammer is mounted on the bottom of the excitation box; the rotating mechanism is composed of a third hydraulic motor, a rotary box body and a driving gear and a slewing gear mounted in the rotary box body; a shank, the slewing gear is tightly sleeved on the shank, and the gear shaft of the driving gear meshing with the slewing gear Connected to the third hydraulic motor; the top of the rotary box is connected to the excitation box through a symmetrically arranged guide rod, and each of the guide rods is provided with a spring, an excitation box body and a lower spring from top to bottom; Installed at the bottom of the rotary box, the venting or water passage of the flushing mechanism communicates with the air guiding holes of the shank.

The guide rods arranged symmetrically have four or more guides, and the tops of the guide rods are connected to each other through the top plate.

The impact hammer is connected to the excitation box through a coupling sleeve, and the end of the impact hammer is provided with a step. A recoil sleeve for connecting the shank and the impact hammer is mounted above the rotary box, and the recoil sleeve is The inner upper end and the inner lower end respectively press the step of the end of the impact hammer and the step of the top of the drill tail.

At the top of the rotary box, there is a stop for pressing up the back sleeve.

The impact mechanism used in the invention is driven by a hydraulic motor to generate an eccentric block, which generates a high-frequency vibration shock. Compared with the current cylinder-piston hydraulic rock drill, the utility model has the advantages of simple structure, large impact force, stepless adjustment of impact frequency and impact force, and the like. .

DRAWINGS

1 is a schematic view showing the structure of an impact type hydraulic rock drill of the present invention.

Figure 2 is a cross-sectional view taken along line A-A of Figure 1.

In the figure: the excitation box 1, the first driving gear 2, the first hydraulic motor 3, the first active eccentric shaft 4, the first eccentric block 5, the second hydraulic motor 6, the second driving gear 7, and the second active eccentricity The shaft 8, the third eccentric block 9, the impact hammer head 10, the rotary box 11, the flushing mechanism 12, the shank 13, the upper spring 14, the first driven gear 15, the first driven eccentric shaft 16, and the second eccentric block 17. The guide rod 18, the second driven gear 19, the second driven eccentric shaft 20, the fourth eccentric block 21, the third hydraulic motor 22, the third driving gear 23, the lower spring 24, the slewing gear 25, and the recoil sleeve 26. The coupling sleeve 27 and the top plate 28.

detailed description

The present invention will be further described below in conjunction with the accompanying drawings:

The impact hydraulic rock drill of the present invention mainly comprises an impact mechanism, a rotating mechanism and a flushing mechanism 12, the impact mechanism is arranged at the upper part, the rotating mechanism is arranged in the middle part, the flushing mechanism 12 is arranged in the lower part; the impact mechanism is mainly composed of two hydraulic motors, four eccentrics The shaft, the four gears, the four eccentric blocks and the excitation box body 1 are formed. The upper part of the excitation box body 1 is mounted side by side with the first active eccentric shaft 4 and the first driven eccentric shaft 16 through the bearing shaft, the first active eccentricity The shaft 4 and the first driven eccentric shaft 16 constitute an upper eccentric group, and the lower portion of the excitation box body 1 is also mounted with the second active eccentric shaft 8 and the second driven eccentric shaft 20, the second active eccentric shaft 8 and the side by side of the bearing. The second driven eccentric shaft 20 constitutes a lower eccentric group; the first active eccentric shaft 4 is mounted The first eccentric block 5 and the first driving gear 2 are mounted, and the first active eccentric shaft 4 is connected to the first hydraulic motor 3; the first driven eccentric shaft 16 is mounted with the second eccentric block 17 and the first driven gear 15. The first driven gear 15 and the first driving gear 2 mesh with each other; the third active eccentric shaft 8 is mounted with a third eccentric block 9 and a second driving gear 7, and the second active eccentric shaft 8 and the second hydraulic motor 6 The second driven eccentric shaft 20 is mounted with a fourth eccentric block 21 and a second driven gear 19, and the second driven gear 19 and the second driving gear Ί mesh with each other, and the bottom of the excitation box 1 is coupled. The sleeve 27 is provided with an impact hammer head 10, the end of the impact hammer head 10 is provided with a step, and the impact hammer head 10 can also adopt an impact hammer head of a conventional structure; the rotating mechanism is composed of a third hydraulic motor 22, a rotary box body 11, and a third active The gear 23, the slewing gear 25 and the stalk 13 are formed, and the third driving gear 23 and the slewing gear 25 meshing with each other are mounted in the rotating box 11, and the slewing gear 25 is tightly sleeved on the shank 13 by the internal spline, the third active Gear 23 is coupled to third hydraulic motor 22 via its gear shaft The top of the rotary box 11 is connected to the excitation box 1 through four guiding rods 18 arranged symmetrically, and each of the guiding rods is arranged with a spring 14 , an excitation box 1 and a lower spring 24 from top to bottom; The mechanism 12 is mounted at the bottom of the rotary case 11, and the venting or water passage of the rinsing mechanism 12 communicates with the air vent of the shank 13.

During normal operation, the first hydraulic motor 3 drives the first active eccentric shaft 4 to rotate, and simultaneously drives the first driving gear 2 to rotate, and the first driven gear 15 that meshes with the first driving gear 2 also rotates, and drives the first A driven eccentric shaft 16 performs synchronous reverse rotation, so that the first eccentric block 5 and the second eccentric block 17 are synchronously reversely rotated, and the centrifugal force generated by the rotation of the two eccentric blocks is in the direction of the center line of the two eccentric shafts. At the same time, they cancel each other out, and the components in the vertical direction of the line connecting the centers of the two eccentric shafts are superimposed on each other and form an exciting force.

Similarly, the second hydraulic motor 6 drives the second active eccentric shaft 8 while driving the second driving gear 7 to rotate, and the second driven gear 19 meshing therewith also rotates, and drives the second driven eccentric shaft 20 to perform Synchronous reverse rotation, thereby achieving synchronous reverse rotation of the third eccentric block 9 and the fourth eccentric block 21, Similarly, the centrifugal force generated by the rotation of the two eccentric masses cancels each other in the direction of the center line of the two eccentric shafts at the same time, and the components in the vertical direction of the center line of the two eccentric shafts are superimposed on each other and form an excitation force. force. The exciting forces generated by the upper eccentric group and the lower eccentric group are superimposed on each other when the phases are the same, and cancel each other when the phases are opposite, and the generated exciting force is transmitted to the impact hammer 10 through the excitation box 1, the exciting force frequency and the excitation The magnitude of the vibration force can be adjusted by the rotational speed control of the first hydraulic motor 3 and the second hydraulic motor 6.

The excitation box body 1 can repeatedly move on the guide rod 18 under the action of the exciting force, and the impact hammer head 10 is fixed on the excitation box body 1, and the impact hammer head 10 is driven by the up and down vibration of the excitation box body 1 The tail 13 is impacted.

The third hydraulic motor 22 drives the third driving gear 23 to rotate, and the third driving gear 23 drives the rotating gear 25 to rotate. The slewing gear 25 drives the shank 13 to rotate, and can also be driven by a double hydraulic motor to increase the torque.

The drill tail 13 is connected to the drill bit, and outputs impact energy and rotational energy to realize rock drilling work.

The flushing mechanism 12 is connected to the air guiding hole of the shank 13 by connecting high-pressure air or high-pressure water, and is sprayed from the drill bit through the drill shaft hole to perform the rock powder generated after the rock drilling.

When the drill pipe is stuck during work and the back-up auxiliary drill is required, a kickback sleeve 26 for connecting the shank 13 and the impact hammer 10 may be installed above the rotary box 11, the recoil sleeve The inner upper end and the inner lower end of 26 can respectively press the step of the end of the impact hammer 10 and the step of the top of the drill tail 13.

In use, the stroke of the impact hammer head 10 is first adjusted by the coupling sleeve 27 to shorten the distance from the excitation vibration box 1 , so that when the vibration excitation box body 1 drives the impact hammer head 10 to vibrate up and down repeatedly, the impact hammer head 10 is used. The recoil sleeve 26 is impacted upwards away from the shank, and the recoil sleeve 26 transmits the upward impact force to the shank to achieve a recoil function.

In order to control the up and down movement stroke of the recoil sleeve 26 within a certain range, the rotary box 11 can be The top of the set is capable of pressing the upward stop of the recoil sleeve 26.

The eccentric shaft constituting the upper or lower eccentric group of the present invention is not limited to two, and a structure of a plurality of layers or a plurality of rows of eccentric groups may be employed.

In order to make the excitation box less likely to be displaced during the vibration process, four or more guide rods may be symmetrically arranged, and the tops of the respective guide rods may be connected to each other through the top plate 28.

The present invention is not limited to the above-described embodiments, and many modifications and refinements can be made without departing from the principles of the invention, and such improvements and modifications should also be considered as the scope of the invention.

Claims

Claim

1. An impact hydraulic rock drill, mainly comprising an impact mechanism, a rotating mechanism and a flushing mechanism, characterized in that: the impact mechanism is arranged at the upper part, the rotating mechanism is arranged at the middle part, the flushing mechanism is arranged at the lower part; the impact mechanism is hydraulically driven and excited The casing, the eccentric shaft, the gear and the eccentric block are configured, and the excitation box body is mounted with at least four eccentric shafts, wherein half of the eccentric shafts are arranged side by side in the upper part of the excitation box body to form an upper eccentric group, and the other half of the eccentricity The shafts are arranged side by side in the lower part of the excitation box to form the lower eccentric group. All the eccentric shafts are equipped with eccentric blocks and gears. The gears of the upper eccentric group mesh with each other, and the gears of the lower eccentric group mesh with each other. The upper eccentric group has an eccentric shaft and the first A hydraulic motor is connected, an eccentric shaft is connected to the second hydraulic motor in the lower eccentric group; an impact hammer is mounted on the bottom of the excitation box; the rotating mechanism is composed of a third hydraulic motor, a rotary box and a rotary box The driving gear and the slewing gear and the shank are formed in the body, and the slewing gear is tightly sleeved on the shank, and the slewing gear is The gear shaft of the driving gear is connected with the third hydraulic motor; the top of the rotating box is connected with the excitation box through a symmetrically arranged guide rod, and each of the guiding rods is arranged with a spring and an excitation box from top to bottom. The body and the lower spring; the flushing mechanism is installed at the bottom of the rotary box, and the ventilation or water passage of the flushing mechanism communicates with the air guiding hole of the solder tail.

The impact type hydraulic rock drill according to claim 1, wherein the symmetrically arranged guide bars have four or more guides, and the tops of the guide bars are connected to each other by a top plate.

The impact type hydraulic rock drill according to claim 1, wherein the impact hammer is connected to the excitation box through a coupling sleeve, and the end of the impact hammer is provided with a step.

4. The impact type hydraulic rock drill according to claim 3, wherein a recoil sleeve for connecting the shank and the impact hammer is mounted above the rotary box, and the inner upper end and the inner lower end of the recoil sleeve are respectively respectively The step of impacting the end of the hammer and the step at the top of the shank are crimped.

5. The impact type hydraulic rock drill according to claim 4, wherein a stopper for pressing up the back sleeve is provided on the top of the rotary box.