阅读说明：本技术 一种冲击凿岩设备 (Impact rock drilling equipment ) 是由 刘飞香 廖金军 孔文 赵贵生 易达云 甘士瑜 田�健 胡及雨 于 2021-09-13 设计创作，主要内容包括：本发明公开了一种冲击凿岩设备,包括传动机构、前端与岩体接触的冲击回转机构,以及布置于所述传动机构和所述冲击回转机构内的液压驱动系统,所述液压驱动系统内填充有传动介质,还包括能够驱动所述冲击回转机构定轴旋转的回转马达,所述冲击回转机构、所述传动机构和所述回转马达沿冲击方向自前至后顺序布置并依次连接,所述冲击回转机构的中段外周部套设有支护机构。该冲击凿岩设备的组件机构布局精巧,结构保护效果较好,且其抗偏载能力较强。(The invention discloses impact rock drilling equipment which comprises a transmission mechanism, an impact swing mechanism with the front end contacting with a rock body, a hydraulic driving system arranged in the transmission mechanism and the impact swing mechanism, wherein the hydraulic driving system is filled with a transmission medium, the impact rock drilling equipment also comprises a swing motor capable of driving the impact swing mechanism to rotate in a fixed shaft manner, the impact swing mechanism, the transmission mechanism and the swing motor are sequentially arranged and connected in sequence from front to back along an impact direction, and a supporting mechanism is sleeved on the periphery of the middle section of the impact swing mechanism. The assembly mechanism of the impact rock drilling equipment is exquisite in layout, good in structure protection effect and strong in unbalance loading resistance.)

1. The utility model provides an impact rock drilling equipment, includes the impact rotation mechanism of drive mechanism, front end and rock mass contact, and arrange in drive mechanism with strike the hydraulic drive system in the rotation mechanism, the hydraulic drive system intussuseption is filled with transmission medium, still including can drive strike the rotatory rotary motor of rotation mechanism dead axle, its characterized in that, strike rotation mechanism drive mechanism with rotary motor arranges and connects gradually along the direction of impact from the front to the back in proper order, the middle section periphery cover that strikes rotation mechanism is equipped with and struts the mechanism.

2. The percussion rock drilling apparatus of claim 1, wherein the percussion rotation mechanism includes a percussion shell inserted and extended from both ends of the support mechanism, a drill bit is provided in linkage at a front end portion of the percussion shell, a plurality of hobs are arranged on a front end surface of the drill bit, and a connector is connected in linkage between a rear end portion of the percussion shell and the transmission mechanism;

the supporting mechanism comprises a shell sleeved on the periphery of the middle section of the impact shell, and a supporting bearing is embedded between the inner wall of the end part of the shell and the outer wall of the impact shell;

the transmission mechanism comprises a rotary joint which is coaxially connected between the connecting body and the rotary motor in a linkage manner, a protective shell is sleeved on the outer peripheral part of the rotary joint, and end covers matched with the rotary joint are respectively arranged at two ends of the protective shell.

3. The impact rock drilling equipment as claimed in claim 2, characterized in that a connecting boss inserted into the rotary joint is convexly arranged in the middle of the rear end face of the connecting body, and a front copper ring is embedded between the front end face of the rotary joint and the rear end face of the connecting body so as to form clearance fit between the front end face of the rotary joint and the rear end face of the connecting body;

and a rear supporting copper ring is embedded between the rear end face of the rotary joint and the inner wall of the corresponding end cover, so that the front end face of the end cover is in clearance fit with the rear end face of the rotary joint.

4. A percussion rock drilling apparatus as claimed in claim 3, characterised in that the rear support copper ring is thicker than the front support copper ring in the axial direction of the swivel joint.

5. An impact rock drilling apparatus as claimed in claim 3, characterized in that a slewing bearing is fitted between the inner wall of the end of the casing and the outer wall of the swivel joint.

6. An impact rock drilling apparatus as claimed in claim 2, wherein the rear of the drill bit is inserted into the impact shell and a collar is fitted between the inner wall of the impact shell and the outer wall of the drill bit.

7. Impact rock drilling apparatus as claimed in claim 6, characterized in that spline grooves are arranged on the inner wall of the impact shell in the axial direction of the impact shell, and that the outer wall of the drill bit has splines on it which are adapted to move in the spline grooves.

8. A percussion rock drilling apparatus as claimed in claim 2, characterised in that the transmission medium is high pressure water.

9. The percussion rock drilling apparatus of claim 8, wherein the hydraulic drive system includes a water inlet channel located in the middle of the connecting body and communicating with an external high-pressure water supply system, a valve element located downstream of the water inlet channel in the direction of water flow is disposed in the percussion shell, a one-way valve is disposed at the rear end of the percussion shell and communicates between the valve element and the water inlet channel to allow water flow from the water inlet channel to the valve element, a percussion piston is disposed in the percussion shell and moves axially thereof, the percussion piston is located between the drill bit and the valve element, and a splitter is disposed in the percussion shell and communicates with the percussion piston and the valve element respectively;

a first shunt passage communicated between a gap between the inner wall of the shunt body and the outer wall of the valve core and the check valve is arranged on the side wall of the rear end part of the shunt body in a penetrating manner along the radial direction of the side wall, a first step surface facing the first shunt passage is arranged on the outer wall of the valve core, an annular groove is also arranged on the outer wall of the valve core, the annular groove is axially positioned on the front side of the first step surface, a second shunt passage and a third shunt passage are arranged on the shunt body in a penetrating manner along the radial direction of the shunt body, a first shell passage communicated between the second shunt passage and the third shunt passage is formed between the outer wall of the shunt body and the inner wall of the impact shell, the first shunt passage, the annular groove, the second shunt passage, the first shell passage and the third shunt passage are sequentially communicated along the water flow direction, and a first plug passage communicated with the downstream of the third shunt passage is formed between the outer wall of the impact piston and the inner wall of the shunt body, the outer wall of the impact piston is provided with a second step surface facing the first plug flow channel, the impact piston is located in a piston cavity in the impact shell, and the piston cavity and the third shunt channel can be communicated through the first plug flow channel;

the flow dividing body is provided with a fourth flow dividing channel extending along the axial direction of the flow dividing body and a fifth flow dividing channel communicated with the fourth flow dividing channel and the piston cavity, the outer peripheral surface of the front end of the valve core is a conical surface with the outer diameter increasing from front to back, the flow dividing body is provided with a sixth flow dividing channel communicated with the downstream of the fourth flow dividing channel and matched with the outer peripheral surface of the front end of the valve core, the valve core is provided with a first valve hole communicated with the valve cavity of the valve core and the sixth flow dividing channel, and the impact shell is provided with a reset flow dividing channel communicated with the downstream of the valve core and matched with the outer wall of the impact piston.

10. An impact rock drilling apparatus as claimed in claim 9, characterized in that a filter element is arranged between the non-return valve and the valve element.

Technical Field

The invention relates to the technical field of rock mass crushing corollary equipment, in particular to impact rock drilling equipment.

Background

In the field of tunneling or other construction requiring rock mass crushing, hydraulically driven impact rock drilling equipment is used in various kinds of rock drilling equipment with high transmission power and high efficiency. With the continuous improvement of construction requirements, the performance of the impact rock drilling equipment is increasingly and widely valued in the industry.

Although the existing impact rock drilling equipment driven by hydraulic pressure can meet the basic rock drilling construction requirements, in the implementation and moving rock breaking process of the equipment, the radial moving resistance of a drill bit is large, the resistance can also be obviously increased along with the increase of the moving speed of the drill bit, and in addition, the non-uniformity of the structure of a rock body can cause the uneven stress of the working surface of the drill bit and the unstable rotation of the drill bit due to the oscillation unbalance loading, so that the working condition can aggravate the abrasion of internal parts of the impact equipment, and the service life of the rock breaking equipment is reduced; and the existing impact rock drilling equipment occupies a large space and is difficult to be used in areas with complex strata and space limitation, which all cause adverse effects on the wide application and the efficient operation of the hydraulically driven impact rock drilling equipment.

Therefore, how to simplify the mechanism layout of the impact rock drilling equipment, optimize the structure protection of the impact rock drilling equipment and improve the unbalance loading resistance of the impact rock drilling equipment is an important technical problem to be solved by the technical personnel in the field at present.

Disclosure of Invention

The invention aims to provide impact rock drilling equipment which is exquisite in component mechanism layout, good in structure protection effect and strong in unbalance loading resistance.

In order to solve the technical problem, the invention provides impact rock drilling equipment which comprises a transmission mechanism, an impact swing mechanism with the front end contacting with a rock body, a hydraulic driving system arranged in the transmission mechanism and the impact swing mechanism, wherein the hydraulic driving system is filled with a transmission medium, the impact swing mechanism further comprises a swing motor capable of driving the impact swing mechanism to rotate by a fixed shaft, the impact swing mechanism, the transmission mechanism and the swing motor are sequentially arranged from front to back along an impact direction and are sequentially connected, and a supporting mechanism is sleeved on the periphery of the middle section of the impact swing mechanism.

Preferably, the impact slewing mechanism comprises impact shells inserted and extended out of two ends of the supporting mechanism, a drill bit is arranged at the front end part of each impact shell in a linkage manner, a plurality of hobs are distributed on the front end surface of the drill bit, and a connecting body is connected between the rear end part of each impact shell and the transmission mechanism in a linkage manner;

the supporting mechanism comprises a shell sleeved on the periphery of the middle section of the impact shell, and a supporting bearing is embedded between the inner wall of the end part of the shell and the outer wall of the impact shell;

the transmission mechanism comprises a rotary joint which is coaxially connected between the connecting body and the rotary motor in a linkage manner, a protective shell is sleeved on the outer peripheral part of the rotary joint, and end covers matched with the rotary joint are respectively arranged at two ends of the protective shell.

Preferably, a connecting boss inserted into the rotary joint is convexly arranged in the middle of the rear end face of the connecting body, and a front supporting copper ring is embedded between the front end face of the rotary joint and the rear end face of the connecting body so as to form clearance fit between the front end face of the rotary joint and the rear end face of the connecting body;

and a rear supporting copper ring is embedded between the rear end face of the rotary joint and the inner wall of the corresponding end cover, so that the front end face of the end cover is in clearance fit with the rear end face of the rotary joint.

Preferably, the thickness of the rear support copper ring along the axial direction of the swivel joint is greater than that of the front support copper ring.

Preferably, a rotary bearing is embedded between the inner wall of the end part of the protective shell and the outer wall of the rotary joint.

Preferably, the rear part of the drill bit is inserted into the impact shell, and a hoop is embedded between the inner wall of the impact shell and the outer wall of the drill bit.

Preferably, spline grooves are arranged on the inner wall of the impact shell along the axial direction of the impact shell, and splines which are movably matched in the spline grooves are arranged on the outer wall of the drill bit.

Preferably, the transmission medium is high pressure water.

Preferably, the hydraulic drive system comprises a water inlet channel which is located in the middle of the connecting body and is communicated with an external high-pressure water supply system, a valve core which is located at the downstream of the water inlet channel along the water flow direction is arranged in the impact shell, a one-way valve which is communicated between the valve core and the water inlet channel and allows water flow to the valve core from the water inlet channel is arranged at the rear end of the impact shell, an impact piston is arranged in the impact shell along the axial direction of the impact shell in a moving mode, the impact piston is located between the drill bit and the valve core, and a shunt body which is respectively communicated and matched with the impact piston and the valve core is further arranged in the impact shell;

a first shunt passage communicated between a gap between the inner wall of the shunt body and the outer wall of the valve core and the check valve is arranged on the side wall of the rear end part of the shunt body in a penetrating manner along the radial direction of the side wall, a first step surface facing the first shunt passage is arranged on the outer wall of the valve core, an annular groove is also arranged on the outer wall of the valve core, the annular groove is axially positioned on the front side of the first step surface, a second shunt passage and a third shunt passage are arranged on the shunt body in a penetrating manner along the radial direction of the shunt body, a first shell passage communicated between the second shunt passage and the third shunt passage is formed between the outer wall of the shunt body and the inner wall of the impact shell, the first shunt passage, the annular groove, the second shunt passage, the first shell passage and the third shunt passage are sequentially communicated along the water flow direction, and a first plug passage communicated with the downstream of the third shunt passage is formed between the outer wall of the impact piston and the inner wall of the shunt body, the outer wall of the impact piston is provided with a second step surface facing the first plug flow channel, the impact piston is located in a piston cavity in the impact shell, and the piston cavity and the third shunt channel can be communicated through the first plug flow channel;

the flow dividing body is provided with a fourth flow dividing channel extending along the axial direction of the flow dividing body and a fifth flow dividing channel communicated with the fourth flow dividing channel and the piston cavity, the outer peripheral surface of the front end of the valve core is a conical surface with the outer diameter increasing from front to back, the flow dividing body is provided with a sixth flow dividing channel communicated with the downstream of the fourth flow dividing channel and matched with the outer peripheral surface of the front end of the valve core, the valve core is provided with a first valve hole communicated with the valve cavity of the valve core and the sixth flow dividing channel, and the impact shell is provided with a reset flow dividing channel communicated with the downstream of the valve core and matched with the outer wall of the impact piston.

Preferably, a filter element is arranged between the one-way valve and the valve core.

Compared with the background art, in the process of assembling and working operation of the impact rock drilling equipment, the support mechanism is arranged at the middle section of the impact slewing mechanism, so that sufficient and reliable structural support and protection are provided for the middle front part of the impact slewing mechanism through the support mechanism, the tolerance of the impact slewing mechanism to radial resistance and the anti-unbalance loading capacity of the impact slewing mechanism are greatly improved, and the overall working efficiency and the working condition adaptability of the equipment are optimized; meanwhile, the transmission mechanism and the rotary motor are uniformly distributed at the rear part of the whole impact rock drilling equipment in an assembly layout mode, so that the structural load of the impact rotary mechanism is further reduced, the overall layout of the equipment is more reasonable, the failure rate of parts is delayed, the service lives of the parts are prolonged, and the overall maintenance cost and the construction cost of the equipment are correspondingly reduced.

In another preferred scheme of the invention, the impact slewing mechanism comprises impact shells inserted and extended out of two ends of the supporting mechanism, a drill bit is arranged at the front end part of each impact shell in a linkage manner, a plurality of hobbing cutters are distributed on the front end surface of each drill bit, and a connecting body is connected between the rear end part of each impact shell and the transmission mechanism in a linkage manner; the supporting mechanism comprises a shell sleeved on the periphery of the middle section of the impact shell, and a supporting bearing is embedded between the inner wall of the end part of the shell and the outer wall of the impact shell; the transmission mechanism comprises a rotary joint which is coaxially connected between the connecting body and the rotary motor in a linkage manner, a protective shell is sleeved on the outer peripheral part of the rotary joint, and end covers matched with the rotary joint are respectively arranged at two ends of the protective shell. Each supporting bearing can further provide sufficient and reliable structural support for the impact slewing mechanism, the structural strength and the operation precision of the impact slewing mechanism are guaranteed, and the supporting effect of the supporting mechanism on the impact slewing mechanism is further optimized.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Figure 1 is a side view of a configuration of an impact rock drilling rig according to an embodiment of the invention;

FIG. 2 is a cross-sectional view of FIG. 1;

FIG. 3 is a schematic illustration of a mating configuration of the hydraulic drive system of FIG. 2 with the impulse piston in an initial state;

FIG. 4 is a schematic view of the engagement structure of the impact piston of FIG. 3 in an accelerated forward motion state;

FIG. 5 is a schematic view of a mating structure of the impact piston of FIG. 3 in a retracted state when the impact piston is forced to move back.

Wherein the content of the first and second substances,

10-impact turning mechanism;

11-an impact shell;

111-a first shell flow channel;

112-a piston cavity;

113-a reset flow channel;

12-a drill bit;

121-hob cutter;

122-a clip;

13-a linker;

131-connecting a boss;

132-a water inlet channel;

14-a valve core;

141-a first step surface;

142-a ring groove;

143-valve cavity;

144-a first valve bore;

15-a one-way valve;

16-an impact piston;

161-a first plug flow channel;

162-a second step surface;

17-a shunt;

171-a first subchannel;

172-a second subchannel;

173-third sub-flow channel;

174-fourth runner;

175-a fifth runner;

176-sixth runner;

18-a filter element;

20-a support mechanism;

21-a housing;

22-support bearings;

30-a transmission mechanism;

31-a swivel joint;

311-front supporting copper ring;

312-rear supporting copper ring;

32-a protective shell;

321-end cap;

33-a slew bearing;

40-rotary motor.

Detailed Description

The core of the invention is to provide the impact rock drilling equipment, the component mechanism layout of the impact rock drilling equipment is exquisite, the structure protection effect is good, and the anti-unbalance loading capability is strong.

In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Please refer to fig. 1 to 5.

In a specific embodiment, the impact rock drilling equipment provided by the invention comprises a transmission mechanism 30, an impact rotation mechanism 10 with the front end contacting with a rock body, a hydraulic driving system arranged in the transmission mechanism 30 and the impact rotation mechanism 10, a transmission medium filled in the hydraulic driving system, and a rotation motor 40 capable of driving the impact rotation mechanism 10 to rotate in a fixed shaft manner, wherein the impact rotation mechanism 10, the transmission mechanism 30 and the rotation motor 40 are sequentially arranged from front to back along an impact direction and are sequentially connected, and a supporting mechanism 20 is sleeved on the periphery of the middle section of the impact rotation mechanism 10.

In the assembling and working operation process, the support mechanism 20 is arranged at the middle section of the impact slewing mechanism 10, so that sufficient and reliable structural support and protection are provided for the middle front part of the impact slewing mechanism 10 through the support mechanism 20, the tolerance of the impact slewing mechanism 10 to radial resistance and the anti-unbalance loading capacity of the impact slewing mechanism are greatly improved, and the overall working efficiency and the working condition adaptability of the equipment are optimized; meanwhile, the transmission mechanism 30 and the rotary motor 40 are uniformly distributed at the rear part of the whole impact rock drilling equipment in an assembly layout mode, so that the structural load at the impact rotary mechanism 10 is further reduced, the overall layout of the equipment is more reasonable, the failure rate of parts is delayed, the service lives of the parts are prolonged, and the overall maintenance cost and the construction cost of the equipment are correspondingly reduced.

Further, the impact rotary mechanism 10 comprises impact shells 11 inserted and extended out of two ends of the support mechanism 20, a drill bit 12 is arranged at the front end of the impact shells 11 in a linkage manner, a plurality of hobs 121 are distributed on the front end face of the drill bit 12, and a connecting body 13 is connected between the rear end of the impact shells 11 and the transmission mechanism 30 in a linkage manner; the supporting mechanism 20 comprises a shell 21 sleeved on the periphery of the middle section of the impact shell 11, and a supporting bearing 22 is embedded between the inner wall of the end part of the shell 21 and the outer wall of the impact shell 11; the transmission mechanism 30 includes a rotary joint 31 coaxially connected between the connecting body 13 and the rotary motor 40 in a linkage manner, a protective shell 32 is sleeved on the outer periphery of the rotary joint 31, and end caps 321 matched with the rotary joint 31 are respectively arranged at two ends of the protective shell 32. Each support bearing 22 can further provide sufficient and reliable structural support for the impact slewing mechanism 10, ensure the structural strength and the operation precision of the impact slewing mechanism 10, and further optimize the support effect of the support mechanism 20 on the impact slewing mechanism 10.

It can be seen that, during the operation of the equipment, the rotation power provided by the rotation motor 40 is transmitted to the connecting body 13 through the rotation joint 31, and is further transmitted to the impact shell 11 through the connecting body 13, thereby driving the drill bit 12 at the front end of the impact shell 11 to rotate synchronously.

Specifically, a connecting boss 131 inserted into the rotary joint 31 is convexly arranged in the middle of the rear end face of the connecting body 13, a front supporting copper ring 311 is embedded between the front end face of the rotary joint 31 and the rear end face of the connecting body 13, and thus, clearance fit between the front end face of the rotary joint 31 and the rear end face of the connecting body 13 is formed; a rear copper ring 312 is fitted between the rear end face of the rotary joint 31 and the inner wall of the end cap 321 corresponding thereto, and a clearance fit is formed between the front end face of the end cap 321 and the rear end face of the rotary joint 31. The front supporting copper ring 311 can cooperate with the rear supporting copper ring 312 to effectively limit the working position of the swivel joint 31, avoid the swivel joint 31 from being dislocated or loosened, provide reliable structural buffering for the swivel joint 31, and ensure the structural impact resistance of the swivel joint 31 and related connecting pieces thereof.

On the basis, when the impact slewing mechanism 10 is forced to retract during actual operation of the equipment, the rear copper protecting ring 312 needs to bear a certain acting force, the structural impact borne by the rear copper protecting ring is larger than that borne by the front copper protecting ring 311, and therefore the thickness of the rear copper protecting ring 312 is larger than that of the front copper protecting ring 311, so that the structural strength and the impact resistance of the rear copper protecting ring are further improved.

More specifically, a rotary bearing 33 is fitted between an inner wall of an end portion of the casing 32 and an outer wall of the rotary joint 31. The slewing bearing 33 can provide further structural support for the slewing connector 31, ensure the fit clearance between the protective shell 32 and the slewing connector 31, and ensure the rotation efficiency and the fluency of the slewing connector 31 relative to the protective shell 32.

Furthermore, the rear part of the drill bit 12 is inserted into the impact shell 11, and a clamp 122 is embedded between the inner wall of the impact shell 11 and the outer wall of the drill bit 12. The clamp 122 can effectively limit the limit position of the drill bit 12 in the impact operation process, prevent the drill bit 12 from loosening or misplacing, and ensure the operation precision of the drill bit 12 and the assembly precision between the drill bit 12 and the impact shell 11.

In addition, spline grooves are arranged on the inner wall of the impact shell 11 along the axial direction of the impact shell 11, and splines which are movably fitted in the spline grooves are arranged on the outer wall of the drill bit 12. The spline groove adapting structure can provide reliable positioning and guiding along the axial direction of the drill bit 12, so that the reciprocating motion tracking performance and the impact operation precision of the drill bit 12 are further ensured.

On the other hand, the transmission medium filled in the hydraulic driving system is high-pressure water. The water is used as a fluid transmission working medium, has low price, safe operation, environmental protection and no pollution, is suitable for various complex working conditions, and can be used as a high-pressure driving medium for impacting rock drilling equipment. The hydraulic drive system has the advantages that water replaces conventional hydraulic oil to serve as a hydraulic drive medium, the operation cost and the construction cost of equipment can be greatly reduced, the pollution to the surrounding environment during the operation of the equipment is reduced, local materials can be used in local operation areas, local water sources are directly used as high-pressure water sources, and the working condition adaptability of the equipment is improved.

Please refer to fig. 3 to 5.

Correspondingly, the hydraulic driving system comprises a water inlet channel 132 which is positioned in the middle of the connecting body 13 and is communicated with an external high-pressure water supply system, a valve core 14 which is positioned at the downstream of the water inlet channel 132 along the water flow direction is arranged in the impact shell 11, a one-way valve 15 which is communicated between the valve core 14 and the water inlet channel 132 and allows water flow to the valve core 14 from the water inlet channel 132 is arranged at the rear end part of the impact shell 11, an impact piston 16 is arranged in the impact shell 11 along the axial direction thereof, the impact piston 16 is positioned between the drill bit 12 and the valve core 14, and a shunting body 17 which is respectively communicated and matched with the impact piston 16 and the valve core 14 is also arranged in the impact shell 11;

a first shunt passage 171 communicated between a gap between the inner wall of the shunt body 17 and the outer wall of the valve element 14 and the check valve 15 penetrates through the side wall of the rear end portion of the shunt body 17 along the radial direction thereof, a first step surface 141 facing the first shunt passage 171 is provided on the outer wall of the valve element 14, an annular groove 142 is further provided on the outer wall of the valve element 14, the annular groove 142 is positioned at the front side of the first step surface 141 along the axial direction, a second shunt passage 172 and a third shunt passage 173 penetrate through the shunt body 17 along the radial direction thereof, a first shell passage 111 communicated between the second shunt passage 172 and the third shunt passage 173 is formed between the outer wall of the shunt body 17 and the inner wall of the impact shell 11, the first plug passage 161 communicated with the downstream of the third shunt passage 173 is formed between the outer wall of the impact piston 16 and the inner wall of the shunt body 17 in sequence along the water flow direction, the outer wall of the impact piston 16 is provided with a second step surface 162 facing the first plug flow passage 161, the impact piston 16 is positioned in the piston cavity 112 inside the impact shell 11, and the piston cavity 112 and the third branch flow passage 173 can be communicated through the first plug flow passage 161;

the flow dividing body 17 is provided with a fourth flow dividing channel 174 extending along the axial direction thereof and a fifth flow dividing channel 175 communicating the fourth flow dividing channel 174 with the piston cavity 112, the outer peripheral surface of the front end of the valve core 14 is a conical surface with the outer diameter increasing from front to back, the flow dividing body 17 is provided with a sixth flow dividing channel 176 communicating with the downstream of the fourth flow dividing channel 174 and adapted to the outer peripheral surface of the front end of the valve core 14, the valve core 14 is provided with a first valve hole 144 communicating with the valve cavity 143 of the valve core 14 and the sixth flow dividing channel 176, and the impact shell 11 is provided with a reset flow channel 113 communicating with the downstream of the valve core 14 and adapted to the outer wall of the impact piston 16.

Further, a filter element 18 is provided between the check valve 15 and the valve body 14. This filter core 18 can effectively completely cut off and filter impurity and foreign matter in the high-pressure water to in these impurity and foreign matter get into the hydraulic drive system in low reaches and produce jam and jamming to relevant hydraulic pressure pipeline and part, guarantee hydraulic drive system's stable smooth operation, and make the whole working process of impact rock drilling equipment is more steady reliable.

In order to facilitate understanding of the structural layout of the hydraulic drive system, the operation of the hydraulic drive system will be described below with reference to fig. 3 to 5.

Please refer to fig. 3 and 4.

During impact operation, high-pressure water is introduced into the water inlet channel 132 from an external high-pressure water supply system through the transmission mechanism 30, then sequentially enters the first branch channel 171 through the check valve 15 and the filter element 18, at the moment, the first step surface 141 is impacted by high-pressure water from the first branch channel 171 to drive the valve core 14 to move forward in an accelerated manner until the annular groove 142 is communicated with the second branch channel 172, then the high-pressure water is impacted into the second branch channel 172, then is introduced into the first plug channel 161 through the first shell channel 111 and the third branch channel 173, and at the moment, the second step surface 162 is impacted by the high-pressure water from the first plug channel 161 to drive the impact piston 16 to move forward in an accelerated manner; with the acceleration of the percussion piston 16 moving forward, the drill bit 12 is also pushed to move forward in a synchronous acceleration manner until the third shunt 173 is communicated with the piston cavity 112, the third shunt 173 is depressurized, the acceleration of the percussion piston 16 is zero, and at this moment, the valve element 14 is still at the foremost working position under the high-pressure water pressure from the first shunt 171.

Please refer to fig. 5.

When the drill bit 12 rebounds under the reaction force of the front rock body in the process of impact operation, the drill bit 12 drives the impact piston 16 to synchronously retreat, when the drill bit retreats to the second step surface 162 to be matched with the flow dividing body 17, high-pressure water enters the fourth flow dividing channel 174 through the fifth flow dividing channel 175, the water pressure at the fifth flow dividing channel 175 continuously rises along with the continuous increase of the retreat amount of the assembly, and then the high-pressure water impacts the outer peripheral surface of the front end of the valve core 14 through the sixth flow dividing channel 176 so as to push the valve core 14 to retreat in an accelerating way; when the valve core 14 retreats to the sixth branch channel 176 and is communicated with the first valve hole 144, the high-pressure water flow at the sixth branch channel 176 is relieved, and at this time, the valve core 14 performs deceleration retreat because the valve core 14 is simultaneously subjected to the pressure of the high-pressure water flow at the first branch channel 171; when the liquid cavity between the impact piston 16 and the impact shell 11 is communicated with the reset flow passage 113, the high-pressure water flow at the valve core 14 is introduced into the liquid cavity between the impact piston 16 and the impact shell 11 through the reset flow passage 113, so as to drive the impact piston 16 to continuously retreat until returning to the initial position.

If the drill bit 12 is not subjected to a reaction force during the impact operation and the rebound does not occur, the impact piston 16 drives the drill bit 12 to move forward until the speed is 0.

It should be pointed out that, in view of the structural sealing requirements of each part during actual operation, sealing rings can be arranged at necessary positions such as between the adaptation surfaces of each shell part or related hydraulic parts and at the edge part, so as to ensure the sealing and isolation of the pipeline or the cavity and ensure the stable and reliable operation of each part and the pipeline.

In conclusion, in the assembling and working operation processes of the impact drilling equipment provided by the invention, the support mechanism is arranged at the middle section of the impact slewing mechanism, so that sufficient and reliable structural support and protection are provided for the middle front part of the impact slewing mechanism through the support mechanism, the tolerance of the impact slewing mechanism to radial resistance and the anti-unbalance loading capacity of the impact slewing mechanism are greatly improved, and the integral working efficiency and the working condition adaptability of the equipment are optimized; meanwhile, the transmission mechanism and the rotary motor are uniformly distributed at the rear part of the whole impact rock drilling equipment in an assembly layout mode, so that the structural load of the impact rotary mechanism is further reduced, the overall layout of the equipment is more reasonable, the failure rate of parts is delayed, the service lives of the parts are prolonged, and the overall maintenance cost and the construction cost of the equipment are correspondingly reduced.

The impact rock drilling rig provided by the invention is described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.