WO2018223421A1

WO2018223421A1 - Pneumatic self-propelled ultrahigh-pressure-pulsed-jet auxiliary impacting rock-breaking equipment

Info

Publication number: WO2018223421A1
Application number: PCT/CN2017/089141
Authority: WO
Inventors: 江红祥; 杜长龙; 刘送永; 刘增辉; 李洪盛; 杨道龙; 高魁东
Original assignee: 中国矿业大学
Priority date: 2017-06-09
Filing date: 2017-06-20
Publication date: 2018-12-13
Also published as: AU2017393408A1; CN107083922B; RU2689453C1; AU2017393408B2; CN107083922A; CA3013481A1; CA3013481C

Abstract

Disclosed is pneumatic self-propelled ultrahigh-pressure-pulsed-jet auxiliary impacting rock-breaking equipment. An end cover is provided at the front end of a front-portion pressurized-water cavity (11); the tail end of the front-portion pressurized-water cavity is connected to the front end of a middle-portion plunger cavity (10); the tail end of the middle-portion plunger cavity is connected to the front end of an impacting plunger accelerating cavity (9); a water/air inlet connector (8) is provided at the tail end of the impacting plunger accelerating cavity; the end cover is provided with rock-passing chutes (11-9), an alloy nozzle spherical gear (11-7), and an alloy spherical gear (11-8); the front-portion pressurized-water cavity is provided with an impacting drill bit (13) and a spring (14); the middle-portion plunger cavity is provided with a middle-portion plunger (16); the impacting plunger accelerating cavity is provided with an impacting plunger (18); the end cover, the front-portion pressurized-water cavity, the middle-portion plunger cavity, the impacting plunger accelerating cavity, and an internal water channel of the water/air inlet connector are communicated with each other in sequence; and the water/air inlet connector is separately connected to an air compressor (1) and a low-pressure water-feeding pump (3) by means of water-air combined pipes (7). The equipment applies ultrahigh pressure squeezing pulsed-jet to the process of mechanical impacting rock-breaking, so that rocks with a very high Platts hardness coefficient can be drilled and broken

Description

Pneumatic self-propelled ultra-high pressure pulse jet assisted impact rock breaking equipment

Technical field

The invention relates to a pneumatic self-propelled ultra-high pressure pulse jet auxiliary impact rock breaking device, which is most suitable for drilling or breaking rock with high hardness coefficient of Platts.

Background technique

In 2015, the BP World Energy Statistics Yearbook pointed out that China is still the world's largest energy consumer, accounting for 23% of global consumption and 61% of global net growth; coal resource consumption accounts for 66.03% of total consumption in the future. For a long period of time, it has an irreplaceable position as China's main energy source. The National Medium- and Long-Term Plan for Science and Technology Development (2006-2020) clearly states that there is an urgent need to strengthen the research on the safe and efficient mining and utilization of coal resources, and explicitly require the focus on deep and complex formation ore mining technology.

At present, coal mining has gradually developed into deep and complex formations, and has put forward higher requirements and new challenges for safe and efficient mining technology and equipment for deep and complex formation coal resources. Due to the increase of ground stress, the elastic modulus, hardness and fracture strength of coal and rock in deep and complex formations generally increase, and the uniaxial compressive strength often reaches 150 MPa or more. Coal and rock drilling is the premise of efficient implementation of ore body blasting, pressure relief mining and roadway support. The problems of low drilling efficiency and large dust volume of hard coal rock directly restrict the ore body resources such as coal in deep and complex formations. Efficient development. The underground coal rock drilling mainly adopts two methods: mechanical cutting and impact: when the mechanical cutting breaks the rock, the tool wear is serious and the consumption is large. It is mainly used for cutting and breaking the coal rock with the hardness coefficient f≤8; the mechanical impact can break most of the coal. Coal rock, but working in hard coal rock (f>15), there are problems such as severe ball tooth wear and shedding, low rock breaking efficiency and large amount of dust, which greatly reduces the mechanical impact rock breaking ability, efficiency, equipment service life and reliability. Sex, how to achieve safe and efficient crushing of hard coal has become a key issue and difficulty in the efficient development of mineral resources such as coal in deep and complex formations.

The auxiliary action of high-pressure water jet has been proved to improve the rock breaking capacity of the tool and prolong the service life of the tool. However, the continuous high-pressure water jet water consumption meeting causes a large area of water to be generated in the coal rock crushing machine working place, which makes the equipment difficult to work normally. The common continuous water jet assisted rock breaking only produces a single "water hammer pressure", and the impact rock breaking ability is limited, and the subsequent "stagnation pressure" is difficult to aggravate the internal damage and crack propagation of the hard coal rock, resulting in its failure to be hard. Coal and rock crushing equipment is widely used. The impact of pulse jet on crushing coal rock is much stronger than continuous jet. The low temperature impact and low water consumption of pulse jet can reduce the wear rate and consumption of ball teeth, prolong the service life of ball teeth and improve the working conditions of mechanical impact rock breaking.

Summary of the invention

OBJECT OF THE INVENTION: The object of the present invention is to overcome the deficiencies of the prior art and provide a pneumatic self-propelled ultra-high pressure pulse jet assisted impact rock breaking device, which truly integrates an ultrahigh pressure squeeze pulse jet into a mechanical shock. The rock process overcomes the problem of rock drilling and crushing with extremely high hardness factor.

In order to achieve the above object, the present invention adopts the following technical scheme: a pneumatic self-propelled ultra-high pressure pulse jet assisted impact rock breaking device, including an air compressor, a gas storage tank, a low pressure feed water pump, a relief valve, a pulse solenoid valve Ball valve, water and gas combination pipe, inlet water connection, impact piston acceleration cavity, middle piston cavity, front pressurized water chamber, check valve, impact bit, spring, cut-off sleeve, middle piston, impact piston and Impact piston cushion;

The front end of the front pressure water chamber is provided with an end cover, the front end of the front pressure water chamber is connected with the front end of the middle piston chamber body, the tail end of the middle piston chamber body is connected with the front end of the impact piston acceleration chamber body, and the impact piston accelerates the end of the cavity body. The utility model is provided with a water inlet joint, and the center of the end cover is provided with a drill head assembly hole, and the end cover is evenly distributed with a plurality of overburden grooves, and the outer end faces of the end cover are alternately arranged with a plurality of alloy nozzle ball teeth and alloy ball teeth, and the inner end surface of the end cover A pressure water tank is opened, and an ultra-high pressure water channel is opened at the bottom of the pressure water tank. The ultra-high pressure water channel communicates with the alloy nozzle ball teeth, the connecting water channel side wall is provided with a connecting water channel, and the front pressure water chamber body cavity is provided with an impact bit and a spring, impact brazing The head is matched with the assembly hole of the bit, the middle part of the impact bit is matched with the inner cavity of the front pressure water chamber, the spring is arranged at the tail of the impact bit, and the water channel IV, the water channel IV and the connected water channel are opened on the front pressure water chamber. Through the one-way valve communication, the front end of the inner cavity of the middle piston cavity is provided with a groove I, the groove I is embedded with a cut-off sleeve, and the central piston is provided with a middle piston in the middle of the inner cavity of the middle piston cavity, and the front end of the middle piston passes through the cut-off sleeve and is in contact with the spring. The cut-off sleeve prevents the central piston from coming out of the central piston chamber, and the water passage III is opened on the middle piston chamber, the water passage III is connected to the water passage IV, and the impact piston is provided with an impact piston in the inner cavity of the acceleration chamber, and is opened on the impact piston acceleration chamber. Water channel II, water channel II is connected to water channel III, water inlet port and air inlet port are provided on the outer end surface of the inlet water connection, groove II is arranged on the inner end surface of the inlet water connection, and the impact piston cushion is embedded in the groove II. A water channel I and an air passage are opened on the joint, and the water passage I is respectively connected with the water passage II and the water inlet, and the air passage respectively communicates with the impact piston to accelerate the inner cavity and the air inlet of the cavity;

The water-gas combination pipe comprises a high-pressure water pipe and a gas pipe, and the high-pressure water pipe is respectively connected with the water inlet and the ball valve, and the ball valve is connected with the low-pressure feed water pump through the overflow valve, the gas pipe is respectively connected with the air inlet port and the pulse electromagnetic valve, and the pulse electromagnetic valve passes through the gas storage tank and The air compressor is connected.

Further, the front end of the impact bit is inlaid with an alloy body.

Further, the outer surface of the impact bit is provided with a sealing ring groove IV, and the outer ring of the impact bit is provided with a sealing ring groove V.

Further, the end cap and the front pressure water chamber are fixed by welding, and the front pressure water chamber, the middle piston chamber, the impact piston acceleration chamber and the water inlet joint are connected by magnetic bolts.

Further, the end surface of the end portion of the impact piston accelerating cavity is provided with a sealing ring groove I, the end surface of the end portion of the central piston cavity is provided with a sealing ring groove II, and the end surface of the front pressurized water chamber body is sealed. Circle slot III.

Further, the impact piston is internally provided with a deep hole to reduce the weight of the impact piston, and the impact piston material is aluminum alloy or copper.

Further, the gas pipe adopts a steel pipe, and the number of steel wires of the gas pipe is not less than 2, in the high pressure water pipe and the gas pipe Externally wrapped elastic rubber cover.

Advantageous Effects: The invention adopts air pressure driving, has small overall size, simple and compact structure, convenient installation and disassembly, large power, simple and reliable high-pressure water sealing, and ultra-high pressure pulse jet assisting mechanical impact to realize rock drill with high Platts hardness coefficient. Hole or broken. The ultra-high pressure pulse jet can greatly damage the rock, reduce the rock strength, minimize the fracture resistance of the hard rock, reduce the difficulty of mechanical impact to break the hard rock, and improve the ability and efficiency of the impact rock breaking equipment to drill hard rock. . Ultra-high pressure pulse jet can not only suppress the dust generated by rock fragmentation, but also realize the mechanical ball tooth breaking hard rock, prolong the service life of mechanical ball teeth, improve the safe and efficient development of energy resources, and sustainable for mines in China. Development has important social significance.

DRAWINGS

1 is a cross-sectional view of a pneumatic self-propelled ultra-high pressure pulse jet assisted impact rock breaking device of the present invention;

Figure 2 is a front elevational view of the front pressurized water chamber of the present invention;

Figure 3 is a left side view of the front pressurized water chamber of the present invention;

Figure 4 is a cross-sectional view of the impact bit of the present invention.

Figure 5 is a cross-sectional view of the central piston chamber of the present invention;

Figure 6 is a cross-sectional view of the impact piston accelerating cavity of the present invention;

Figure 7 is a cross-sectional view of the water inlet joint of the present invention;

Figure 8 is a front view of the water and gas combination pipe of the present invention;

In the figure: 1—air compressor; 2—gas storage tank; 3—low pressure feed pump; 4—relieving valve; 5—pulse solenoid valve; 6-ball valve; 7—water and gas combination pipe; 8—inlet water connection ; 9 - impact piston acceleration cavity; 10 - middle piston cavity; 11 - front pressure water cavity; 12 - check valve; 13 - impact bit; 14 - spring; 15 - cutoff; ; 17 - magnetic bolt; 18 - impact piston; 19 - impact piston cushion; 7-1 - high pressure water pipe; 7-2 - elastic rubber cover; 7-3 - air pipe; 8-1 - water inlet; 8-2 - Air inlet; 8-3 - water channel I; 8-4 - groove II; 8-5 - air passage; 8-6 - threaded hole I; 9-1 - sealing ring groove I; 9-2 - water channel II; 9-3—Threaded hole II; 10-1—sealing ring groove II; 10-2—water channel III; 10-3—groove I; 10-4—threaded hole III; 11-1—seal ring groove III; -2 - water channel IV; 11-3 - hole trough; 11-4 - connecting water channel; 11-5 - threaded hole IV; 11-6 - ultra high pressure water channel; 11-7 - alloy nozzle ball teeth; 11-8 - alloy Ball teeth; 11-9-over-crushing trough; 11-10-end cover; 11-11-pressure trough; 11-12-bit assembly hole; 13-1-alloy head; 13-2-bit ; 13-3- ring groove IV; 13-4- ring groove V; 18-1- deep.

detailed description:

The invention will be further explained below in conjunction with the drawings.

As shown in FIG. 1 , a pneumatic self-propelled ultra-high pressure pulse jet assisted impact rock breaking device comprises an air compressor 1, a gas storage tank 2, a low pressure feed water pump 3, an overflow valve 4, and a pulse solenoid valve 5. , ball valve 6, water and gas combination pipe 7, Inlet water connection 8, impact piston acceleration chamber 9, middle piston chamber 10, front pressurized water chamber 11, check valve 12, impact bit 13, spring 14, cut sleeve 15, middle piston 16, impact piston 18. Impact piston cushion 19. The front end of the front pressurized water chamber 11 is provided with an end cover 11-10, the rear end of the front pressurized water chamber 11 is connected to the front end of the central piston chamber 10, and the rear end of the central piston chamber 10 is connected to the front end of the impact piston accelerating chamber 9. The inlet end of the impact piston accelerating chamber 9 is provided with a water inlet joint 8.

As shown in Figures 1, 2, 5, 6, and 7, the end cap 11-10 and the front pressurized water chamber 11 are fixed by welding. A threaded hole IV11-5 is formed in the end surface of the front end of the pressurized water chamber 11, and a threaded hole III10-4 is formed at the front end and the end end of the central piston chamber 10, and the front end and the end end of the impact piston 9 are at the end of the impact piston. A threaded hole II9-3 is opened, and a threaded hole I8-6 is opened at the front end surface of the inlet water joint 8, and the front pressurized water chamber 11, the middle piston chamber 10, the impact piston accelerating chamber 9 and the water inlet gas are opened. The joints 8 are fixed by magnetic bolts 17. In order to ensure the tightness of the joint between the front pressurized water chamber 11, the middle piston chamber 10, the impact piston accelerating chamber 9 and the inlet water connection 8, the end surface of the impact piston accelerating chamber 9 is sealed. a ring groove I9-1, a rear end end face of the middle piston cavity 10 is provided with a seal ring groove 110-1, and a front end end face of the front pressurized water chamber is provided with a seal ring groove III11-1, in the above seal ring groove A sealing ring is installed inside.

As shown in FIGS. 1 to 4, the end caps 11-10 are provided with a bit fitting hole 11-12 at the center, and the end caps 11-10 are evenly distributed with a plurality of cuttings grooves 11-9, and the outer end faces of the end caps 11-10 are alternately arranged. A plurality of alloy nozzle ball teeth 11-7 and alloy ball teeth 11-8 are arranged, and the inner end surface of the end cover 11-10 is provided with a pressure water tank 11-11, and the bottom of the pressure water tank 11-11 is provided with an ultrahigh pressure water channel 11-6, and an ultrahigh pressure The water channel 11-6 is in communication with the alloy nozzle ball 11-7, the side wall of the pressure water tank 11-11 is provided with a communication water channel 11-4, and the inner cavity of the front pressure water chamber 11 is provided with an impact bit 13 and a spring 14, impact brazing The head of the head 13 is matched with the mounting hole 11-12 of the bit. The front end of the head of the impact bit 13 is inlaid with the alloy head body 13-1. The middle portion of the impact bit 13 is matched with the inner cavity of the front pressurized water chamber 11, and the spring 14 is disposed. In order to ensure the tightness between the impact bit 13 and the end cap 11-10 and the front pressurized water chamber 11 at the end of the impact bit 13, the outer ring of the impact bit 13 is provided with a seal ring groove IV13-3. A seal ring groove V13-4 is formed in the outer circumference of the impact bit 13 in the middle of the periphery, and a seal ring is installed in the seal seal groove. A water passage IV11-2 is opened in the front pressurized water chamber 11, and the water passage IV11-2 is communicated with the communication water passage 11-4 through the check valve 12, and the check valve 12 is installed in the hole 11 at the end of the water passage IV11-2. 3, for preventing backflow of water inside the front pressurized water chamber 11.

As shown in FIGS. 1 and 5, the front end of the inner cavity of the central piston chamber 10 is provided with a groove I10-3, a recessed sleeve 15 is embedded in the recess I10-3, and a central piston 16 is disposed in the middle of the inner cavity of the central piston chamber 10. The front end of the 16 passes through the cut-off sleeve 15 and is in contact with the spring 14, and the middle piston 16 is prevented from coming out of the middle piston cavity 10 through the cut-off sleeve 15, and the water passage III10-2 is opened on the middle piston chamber 10, and the water passage III10-2 is connected. Waterway IV11-2. In the embodiment, the groove I10-3 has a non-circular cross section, which can prevent the cut sleeve 15 from interfering with the water channel III10-2, facilitate the installation of the cut sleeve 15, and reduce the number of water passage seals.

As shown in FIGS. 1 and 6, the inner cavity of the impact piston accelerating cavity 9 is provided with an impact piston 18, and the impact piston 18 is internally provided with a deep hole 18-1 to reduce the weight of the impact piston 18. The material of the impact piston 18 is an aluminum alloy. Or copper. A water channel II9-2 is opened on the impact piston accelerating cavity 9, and a water channel II9-2 is connected to the water channel III10-2 and the water channel I8-3.

As shown in Figures 1 and 7, the outer end surface of the inlet water connection 8 is provided with a water inlet 8-1 and an air inlet 8-2, and the inner end surface of the inlet water connection 8 is provided with a groove II8-4, and the groove II8-4 The impact piston cushion 19 is embedded therein, and the water channel I8-3 and the air passage 8-5 are opened on the inlet water joint 8, and the water channel I8-3 is connected to the water channel II9-2 and the water inlet 8-1, respectively, and the air passage 8-5 respectively The connecting impact piston accelerates the cavity 9 and the intake port 8-2.

As shown in Figures 1 and 8, the water-gas combination pipe 7 includes a high-pressure water pipe 7-1 and a gas pipe 7-3, respectively, and the high-pressure water pipe 7-1 communicates with the water inlet 8-1 and the ball valve 6, respectively, and the ball valve 6 passes through the relief valve 4 and the low pressure. The feed water pump 3 is connected, and the air pipes 7-3 are respectively connected to the intake port 8-2 and the pulse solenoid valve 5, and the pulse solenoid valve 5 is connected to the air compressor 1 through the air tank 2. In the present embodiment, the air pipe 7-3 is a steel pipe, and the number of the steel layers of the air pipe 7-3 is not less than 2, and the elastic rubber sleeve 7-2 is wrapped around the high pressure water pipe 7-1 and the air pipe 7-3.

When the air compressor 1 is in operation, the air compressor 1 forms compressed air to be injected into the gas storage tank 2 to form compressed air of stable pressure, and the compressed air of pressure stability forms intermittent gas flow through the pulse electromagnetic valve 5 to the gas pipe of the water and gas combination pipe 7. 7-3, the air passage 8-5 of the inlet water connection 8 is further injected into the impact piston acceleration chamber 9 to act on the impact piston 18, and the impact piston 18 is subjected to the action of compressed air to impact the middle piston 16, and the middle piston 16 impacts the spring. 14 and impact the bit 13 to break the rock. When the low-pressure feed water pump 3 is working, the water with a certain pressure flows into the overflow valve 4, the ball valve 6, the high-pressure water pipe 7-1 of the water-gas combination pipe 7, the water channel I8-3 of the water-intake joint 8, and the impact piston acceleration chamber. The water channel II9-2 of the body 9, the water channel III10-2 of the middle piston cavity 10, the water channel IV11-2 of the front pressurized water chamber 11, the check valve 12, the communication water channel 11-4, and the end cover 11-10 Inside the pressure tank 11-11. When the air compressor 1 and the low pressure feed pump 3 are working at the same time, the impact bit 13 is subjected to the impact force while instantaneously pressurizing the water in the press water tank 11-11 to form an ultrahigh pressure pulse jet impact rock breaking through the alloy nozzle ball 11-7. . While the water in the pressure water tank 11-11 is instantaneously pressurized, the interconnecting end caps 11-10, the front pressurized water chamber 11, the middle piston chamber 10, the impact piston accelerating chamber 9 and the like are subjected to the forward action. The force has a feed speed such that the alloy nozzle ball teeth 11-7 and the alloy ball teeth 11-8 mounted on the end caps 11-10 impact the rock.

When the pneumatic self-propelled ultra-high pressure pulse jet is used to assist the rock drilling of the rock breaking device, the impact piston 18 instantaneously accelerates under the action of compressed air and has a linear speed, and the impact piston 18 impacts the central piston 16 to have a certain impact. Force and speed. The central piston 16 strikes the spring 14 and the impact bit 13 to cause the impact bit 13 to break. The low pressure feed water pump 3 forms a certain pressure of water, passes through the high pressure water pipe 7-1 of the water gas combination pipe 7, the water channel I8-3 of the water inlet joint 8, the water channel II9-2 of the impact piston acceleration chamber 9, and the middle piston cavity The water channel III10-2 of 10, the water channel IV11-2 of the front pressurized water chamber 11, the check valve 12, and the like, are introduced into the pressure water tank 11-11 of the end cap 11-10. When the mechanical impact breaks the rock, the middle piston 16 impacts the spring 14 and the impact bit 13 simultaneously, and the impact bit 13 is impacted. At the same time, the water in the pressure water tank 11-11 is instantaneously pressurized through the ultra-high pressure water channel 11-6, and the instantaneous ultra-high pressure pulse jet is formed by the alloy nozzle ball 11-7, and the ultra-high pressure pulse jet can advance the impact of the impact bit 13 Rocks outside the range. When the impact bit 13 instantaneously pressurizes the water in the water pressure tank 11-11, the end cap 11-10, the front pressurized water chamber 11, the middle piston chamber 10, the impact piston accelerating chamber 9, and the like are coupled to each other. The front force causes the alloy nozzle ball teeth 11-7 and the alloy ball teeth 11-8 to impact the rock.

The release of the compressive elastic potential energy by the spring 14 adversely affects the central piston 16, the impact piston 18, and when the pulsed solenoid valve 5 cuts off the supply of compressed air, the impact piston 18 moves in the opposite direction. When the pulse solenoid valve 5 opens the supply of compressed air, the impact piston 18 performs a forward impact movement again, thereby achieving continuous ultra-high pressure pulse jet assisting impact bit 13, alloy nozzle ball teeth 11-7 and alloy ball teeth 11-8. Impact breaking rock.

The above description is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can also make several improvements and retouchings without departing from the principles of the present invention. It should be considered as the scope of protection of the present invention.

Claims

The utility model relates to a pneumatic self-propelled ultra-high pressure pulse jet auxiliary impact rock breaking device, which comprises: an air compressor (1), a gas storage tank (2), a low pressure feed water pump (3), an overflow valve (4), a pulse Solenoid valve (5), ball valve (6), water and gas combination pipe (7), inlet water connection (8), impact piston acceleration cavity (9), central piston cavity (10), front pressurized water chamber (11), check valve (12), impact bit (13), spring (14), cut-off sleeve (15), central piston (16), impact piston (18) and impact piston cushion (19);

The front end of the front pressurized water chamber (11) is provided with an end cover (11-10), the front end of the front pressurized water chamber (11) is connected to the front end of the central piston chamber (10), and the middle piston chamber (10) tail The end is connected with the front end of the impact piston accelerating cavity (9), the inlet end of the impact piston accelerating cavity body (9) is provided with a water inlet gas joint (8), and the end cap (11-10) is provided with a bit assembly hole at the center (11-). 12), the end cover (11-10) is evenly distributed with a plurality of over-cutting grooves (11-9), and the outer end faces of the end covers (11-10) are alternately arranged with a plurality of alloy nozzle balls (11-7) and alloy balls. Tooth (11-8), the inner end surface of the end cover (11-10) is provided with a pressure water tank (11-11), and the bottom of the pressure water tank (11-11) is provided with an ultra-high pressure water channel (11-6), and an ultra-high pressure water channel (11) -6) communicating with the alloy nozzle ball teeth (11-7), the side wall of the pressure water tank (11-11) is provided with a communication channel (11-4), and the inner cavity of the front pressure water chamber (11) is provided with an impact bit (13) and the spring (14), the head of the impact bit (13) is matched with the bit assembly hole (11-12), and the middle portion of the impact bit (13) is matched with the inner cavity of the front pressurized water chamber (11). The spring (14) is disposed at the tail of the impact bit (13), and the water channel IV (11-2), the water channel IV (11-2) and the connecting water channel (11-4) are opened on the front pressurized water chamber (11). Through a check valve 12) Connected, the middle piston chamber (10) has a groove I (10-3) at the front end of the cavity, a recessed sleeve (15) embedded in the groove I (10-3), and a cavity of the central piston chamber (10) The central portion of the central piston (16) is disposed, the front end of the central piston (16) passes through the cut-off sleeve (15) and is in contact with the spring (14), and the central piston (16) is prevented from the central piston chamber (10) by the cut-off sleeve (15). Internally, the water channel III (10-2) is opened on the central piston cavity (10), the water channel III (10-2) is connected to the water channel IV (11-2), and the inner cavity of the impact piston acceleration cavity (9) is provided. The impact piston (18) has a water channel II (9-2) on the impact piston acceleration cavity (9), a water channel II (9-2) communication channel III (10-2), and an inlet water connection (8) The inlet end is provided with a water inlet (8-1) and an air inlet (8-2), and the inner end surface of the inlet water connection (8) is provided with a groove II (8-4), and the groove II (8-4) is embedded therein. Impact piston cushion (19), water channel I (8-3) and air passage (8-5) are opened on the inlet gas joint (8), and water channel I (8-3) is connected to water channel II (9-2) And the water inlet (8-1), the air passage (8-5) respectively communicates the inner chamber of the impact piston acceleration chamber (9) and the air inlet (8-2);

The water and gas combination pipe (7) includes a high pressure water pipe (7-1) and a gas pipe (7-3), and the high pressure water pipe (7-1) is respectively connected to the water inlet (8-1) and the ball valve (6), and the ball valve (6) Connected to the low pressure feed pump (3) through the relief valve (4), the gas pipe (7-3) is connected to the inlet port (8-2) and the pulse solenoid valve (5), respectively, and the pulse solenoid valve (5) passes through the gas storage tank (2) Connected to the air compressor (1).
The pneumatic self-propelled ultra-high pressure pulse jet assisted impact rock breaking device according to claim 1, characterized in that the front end of the impact bit (13) is inlaid with an alloy body (13-1).
The pneumatic self-propelled ultra-high pressure pulse jet assisted impact rock breaking device according to claim 2, wherein the outer surface of the impact bit (13) is provided with a sealing ring groove IV (13-3) The outer circumference of the impact bit (13) is provided with a seal ring groove V (13-4).
The pneumatic self-propelled ultra-high pressure pulse jet assisted impact rock breaking device according to claim 1, wherein the end cap (11-10) and the front pressurized water chamber (11) are fixed by welding, The front pressurized water chamber (11), the middle piston chamber (10), the impact piston acceleration chamber (9) and the inlet water connection (8) are coupled by a magnetic bolt (17).
The pneumatic self-propelled ultra-high pressure pulse jet assisted impact rock breaking device according to claim 4, characterized in that: the end face of the impact piston accelerating cavity (9) is provided with a sealing ring groove I (9-1) The end face of the middle piston cavity (10) is provided with a seal ring groove (1-1), and the end end of the front pressurized water chamber (11) is provided with a seal ring groove III (11-1). ).
The pneumatic self-propelled ultra-high pressure pulse jet assisted impact rock breaking device according to claim 1, wherein the impact piston (18) is internally provided with a deep hole (18-1) to reduce the impact piston ( 18) Weight, impact piston (18) material is aluminum alloy or copper.
The pneumatic self-propelled ultra-high pressure pulse jet assisted impact rock breaking device according to claim 1, wherein the gas pipe (7-3) adopts a steel pipe, and the steel pipe (7-3) has no steel wire layer. Less than 2, the elastic rubber sleeve (7-2) is wrapped around the high pressure water pipe (7-1) and the air pipe (7-3).