A high-efficiency injection-suction hydraulic impactor

Abstract

The present invention belongs to the field of drilling machinery, and specifically relates to a high-efficiency injection-suction hydraulic impactor, comprising: an upper joint, a nozzle, a nozzle support, a limiting guide sleeve, a live valve, an impact hammer rod, an outer tube, a lower cylinder sleeve and an impact anvil joint; the nozzle is installed in the center hole of the upper joint, the lower part of the upper joint is installed in the upper end of the outer tube, the limiting guide sleeve is installed in the upper inner hole of the outer tube, the upper limiting step of the live valve is suspended at the limiting ring position of the limiting guide sleeve, the upper end of the nozzle support is installed in the upper end inner hole of the limiting guide sleeve, the lower end guide tube of the nozzle support is inserted into the upper inner hole of the live valve, and the upper end of the impact hammer rod is installed in the lower inner hole of the limiting guide sleeve; the lower end of the impact hammer rod and the upper end of the impact anvil joint are both installed in the lower cylinder sleeve, the upper part of the impact anvil joint is installed in the lower end of the outer tube, and the lower cylinder sleeve is installed in the lower inner hole of the outer tube. The present invention can produce stable injection-suction performance, reduce the starting flow and working pressure, and improve the working performance of the hydraulic impactor.

Description

Technical Field

[0001] The invention belongs to the field of drilling machinery, and in particular relates to a high-efficiency injection-suction hydraulic impactor. Background Art

[0002] The hydraulic impactor is installed on the rotary drill bit as an auxiliary rock crushing tool and is widely used in the fields of drilling and well drilling, including geological and mineral resource drilling, oil drilling, shale gas drilling, coalbed methane drilling, hydrological water well drilling, engineering construction, etc. It is beneficial to improve drilling efficiency, increase core recovery rate, prevent broken rock formations from blocking drill bits, increase drill bit service life, and control borehole deviation.

[0003] The live valve and hammer of the jet-suction hydraulic impactor mainly rely on the suction force generated by the nozzle to move upward. When in the upper position, the hammer valve is used to instantly cut off the water path to generate water hammer to push the hammer piston downward to hit the anvil. The high-speed impact of the hammer on the anvil generates impact energy, which applies periodic impact loads to the drill bit to achieve impact rotation and crushing of rocks. Compared with other hydraulic impactors, it has no spring device, simple structure, fewer wearing parts, and good back pressure resistance.

[0004] In the conventional injection-suction valve control mechanism of the injection-suction hydraulic impactor, the liquid generates a high-speed liquid flow through the nozzle. Whether it is a sleeve valve type or a core valve type structure, the upper end of the active valve or the impact hammer is used as the injection element. Therefore, the active valve and the impact hammer of the conventional hydraulic impactor are both injection-suction elements and actuators. The shortcomings of this structure are: when the impactor is started, since the active valve and the impact hammer are both in the lower position, the injection distance between the nozzle and the nozzle is at the maximum position, which is destined to require a larger nozzle jet velocity when starting this type of impactor, so the nozzle hole diameter processing size is required to be smaller, a larger initial starting flow rate is required, and the starting pressure is high. During the up and down movement of the active valve and the impact hammer, the injection distance with the nozzle is always changing dynamically, and the injection suction force is also changing dynamically. The injection suction performance is not in a stable state, which affects the overall performance stability of the impactor. The injection suction structure parameters change dynamically with the movement of the parts, resulting in dynamic changes in the injection suction force, which leads to problems such as unstable impact frequency, power reduction, low water energy utilization, and reduced working performance of the impactor. This is the main reason why the ejection-suction hydraulic impactor has not been promoted and applied in the field of geological core drilling for decades.

[0005] Therefore, it is urgent to develop a new type of injection-suction hydraulic impactor that can overcome the shortcomings of the existing injection-suction hydraulic impactor and be widely used in the field of geological core drilling. Summary of the invention

[0006] The purpose of the present invention is to provide a high-efficiency injection-suction hydraulic impactor in view of the defects of the injection-suction hydraulic impactor in the prior art, such as large starting flow, high starting and working pressure, unstable performance and low energy utilization rate. By installing a fixed injection-suction unit composed of a nozzle and a spray-bearing element in the impactor, the injection-suction structure parameters are fixed, and stable injection-suction performance is produced, which can effectively improve the working reliability of the hydraulic impactor, improve the utilization rate of water energy, reduce the starting flow and working pressure, and improve the working performance of the hydraulic impactor.

[0007] The technical solution to achieve the purpose of the present invention is:

[0008] A high-efficiency injection-suction hydraulic impactor, the impactor comprising: an upper joint, a nozzle, a nozzle holder, a limiting guide sleeve, a movable valve, an impact hammer rod, an outer tube, a lower cylinder sleeve and an impact anvil joint; the nozzle is installed in the center hole of the upper joint, a limiting step is arranged at the lower end of the outer side of the nozzle, and the nozzle is fixed by the limiting step in the center hole of the upper joint;

[0009] The lower part of the upper joint is installed in the upper end of the outer tube, and the lower part of the upper joint is matched and connected with the upper end of the outer tube; the upper part of the outer tube is provided with an upper inner hole and an upper inner hole limiting step, the limiting guide sleeve is installed in the upper inner hole of the outer tube, and is limited and fixed by the upper inner hole limiting step of the outer tube, and the outer surface of the limiting guide sleeve is matched with the surface of the inner hole of the outer tube in a sliding and sealing manner; the middle part of the limiting guide sleeve is designed with a limiting ring with a center hole, the active valve is installed in the center hole of the limiting ring of the limiting guide sleeve, and the upper limiting step of the active valve is suspended at the limiting ring position of the limiting guide sleeve;

[0010] The upper end of the nozzle holder is installed in the inner hole of the upper end of the limiting guide sleeve, the upper end of the nozzle holder is matched with the inner hole of the upper end of the limiting guide sleeve, the lower surface of the upper end of the nozzle holder is limited by the upper inner hole step of the limiting guide sleeve, the upper end surface of the nozzle holder is limited by the lower end surface of the upper joint, and the upper end surface of the nozzle holder is flush with the upper end surface of the limiting guide sleeve; the lower end guide tube of the nozzle holder is inserted into the inner hole of the upper end of the live valve, and the outer surface of the nozzle holder is matched with the inner hole of the live valve in a sliding seal;

[0011] The upper end of the impact hammer rod is installed in the lower inner hole of the limiting guide sleeve, and the impact hammer rod and the limiting guide sleeve are slidably sealed. A through hole is provided at the center of the impact hammer rod, and an inner boring hole is provided on the through hole of the impact hammer rod. The lower part of the active valve is inserted into the inner boring hole of the impact hammer rod, and the outer cylindrical surface of the active valve and the inner boring hole at the upper end of the impact hammer rod form an annular space.

[0012] The lower end of the impact hammer rod and the upper end of the impact anvil joint are both installed in the lower cylinder sleeve, and the outer circle of the lower end of the impact hammer rod is slidingly sealed with the inner hole of the lower cylinder sleeve; the upper end of the impact anvil joint is clearance-matched with the inner hole of the lower cylinder sleeve; the upper part of the impact anvil joint is installed in the lower end of the outer tube, and the upper part of the impact anvil joint is matched with the lower end of the outer tube, and the lower part of the outer tube is provided with a lower inner hole and a lower limiting step, and the lower cylinder sleeve is installed in the lower inner hole of the outer tube, and the outer circle of the lower cylinder sleeve is clearance-matched with the lower inner hole of the outer tube; the lower cylinder sleeve is limited up and down by the step of the lower inner hole of the outer tube and the step of the impact anvil joint.

[0013] Furthermore, the lower end surface of the upper joint is provided with an inner countersunk hole, and a cavity space is formed between the inner countersunk hole and the nozzle holder.

[0014] Furthermore, water holes communicating with each other from top to bottom are evenly opened in the circumferential direction of the upper part of the spray nozzle.

[0015] Furthermore, an upper cavity and a lower cavity are provided at intervals in the middle inner hole of the limiting guide sleeve, and a longitudinal water groove is processed along the circumference of the outer surface of the limiting guide sleeve, and the water groove connects the upper cavity and the lower cavity.

[0016] Furthermore, an inner hole with a closed bottom is provided at the center of the movable valve, and a water outlet hole is provided laterally at the lower end.

[0017] Furthermore, a lateral water hole is provided at the lower portion of the impact hammer rod, and a guide groove is provided at the contact surface between the bottom and the upper anvil of the impact anvil joint.

[0018] Furthermore, the nozzle is installed in the center hole of the upper joint by interference fit.

[0019] Furthermore, the lower portion of the upper joint is connected to the upper end of the outer tube through threaded fitting.

[0020] Furthermore, the upper portion of the impact anvil joint is connected to the lower end of the outer tube through threaded fitting.

[0021] Furthermore, the inner hole taper of the upper end of the center hole of the nozzle is 0° to 150°, and the inner hole diameter of the lower end of the center hole is 1.5mm to 50mm.

[0022] Furthermore, the depth of the inner countersunk hole is 1 mm to 20 mm.

[0023] Furthermore, the guide groove has a depth of 1.5 mm to 10 mm.

[0024] The beneficial technical effects of the present invention are:

[0025] 1. A high-efficiency injection-suction hydraulic impactor provided by the present invention has a fixed injection-suction unit composed of an upper joint, a nozzle, a spray-bearing element and a limiting guide sleeve installed inside the impactor; the injection-suction structural parameters of the fixed injection-suction unit are fixed, and under certain flow and pressure input conditions, a relatively balanced injection-suction force is generated, and the injection-suction performance is stable; the fixed injection-suction unit generates a stable suction negative pressure, so that the pressure difference between the upper and lower force-bearing surfaces of the active valve and the impact hammer is more stable than that of a conventional injection-suction impactor.

[0026] 2. The fixed injection and suction unit of a high-efficiency injection and suction hydraulic impactor provided by the present invention is a special injection and suction unit, and the active valve and impact hammer are special execution units. Different from the conventional injection and suction hydraulic impactor, the valve and impact hammer are both injection and suction elements and execution elements, which can effectively improve energy utilization and work efficiency.

[0027] 3. The fixed injection-suction unit of a high-efficiency injection-suction hydraulic impactor provided by the present invention can produce an injection effect when a relatively small flow rate is input, which can reduce the starting flow rate and the working pressure, so that the impactor can have a good working performance even under low flow conditions; the injection-suction impactor in the form of a fixed injection-suction unit has a simpler structure, more reliable working performance, and is more convenient to use and maintain.

[0028] 4. The high-efficiency injection-suction hydraulic impactor provided by the present invention improves the injection-suction performance of the hydraulic impactor, increases the water energy utilization rate and the working performance of the hydraulic impactor, ensures the working reliability of the impactor, and broadens the application range of the impactor under small flow conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A schematic diagram of the axial cross-sectional structure of a high-efficiency injection-suction hydraulic impactor provided by the present invention;

[0030] Figure 2 for Figure 1 The cross-sectional structure diagram along the AA direction;

[0031] Figure 3 for Figure 1 Cross-sectional structure diagram along BB direction.

[0032] In the figure: 1. upper joint; 2. nozzle; 3. spray nozzle; 4. limit guide sleeve; 5. live valve; 6. impact hammer rod; 7. outer tube; 8. lower cylinder sleeve; 9. impact anvil joint; 10. inner countersunk hole; 11. water hole; 12. longitudinal water groove; 13. annular space; 14. water outlet hole; 15. through hole; 16. lateral water hole; 17. guide groove. DETAILED DESCRIPTION

[0033] The present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0034] As shown in Figure 1, the present invention provides a high-efficiency injection-suction hydraulic impactor, including an upper joint 1, a nozzle 2, a nozzle holder 3, a limiting guide sleeve 4, a movable valve 5, an impact hammer rod 6, an outer tube 7, a lower cylinder sleeve 8, and an impact anvil joint 9. The lower end surface of the upper joint 1 is provided with an inner countersunk hole 10 with a depth of 1mm to 20mm, and a cavity space is formed between the inner countersunk hole 10 and the nozzle holder 3. The upper part of the upper joint 1 is connected to the drill pipe by threads, and the nozzle 2 is pressed into the center hole of the upper joint 1 by interference fit. A limiting step is provided at the lower end of the outer side of the nozzle 2, which is limited and fixed by the limiting step in the center hole of the upper joint 1. The taper of the inner cone hole of the upper part of the nozzle 2 is 0° to 150°, and the diameter of the inner hole at the lower end is 1.5mm to 50mm.

[0035] The lower part of the upper joint 1 is installed in the upper end of the outer tube 7, and the lower part of the upper joint 1 is rigidly connected with the upper end of the outer tube 7 by thread. The lower part of the connecting thread of the outer tube 7 is provided with an upper inner hole and an upper limiting step which are concentric with the thread size diameter. The limiting guide sleeve 4 is inserted and installed into the upper inner hole of the outer tube 7 from the upper opening of the outer tube 7. The limiting guide sleeve 4 is positioned by the upper limiting step of the outer tube 7, and the outer surface of the limiting guide sleeve 4 is installed in a sliding sealing manner with the inner hole surface of the outer tube 7.

[0036] like Figure 3 As shown, the middle inner hole of the limiting guide sleeve 4 is provided with an upper cavity and a lower cavity at intervals, and the outer surface of the limiting guide sleeve 4 is provided with a longitudinal water groove 12 along the circumference, and the longitudinal water groove 12 connects the upper cavity and the lower cavity. When the upper joint 1 and the outer tube 7 are screwed tightly, the lower end surface of the upper joint 1 is just pressed against the upper end surface of the limiting guide sleeve 4 and the nozzle holder 3, which plays a role in limiting and fixing.

[0037] The middle part of the limiting guide sleeve is designed with a limiting ring with a center hole, the upper end face of the limiting ring is 10mm to 100mm away from the upper end face of the limiting guide sleeve, the active valve is installed in the center hole of the limiting ring of the limiting guide sleeve, and the upper limiting step of the active valve is suspended at the position of the limiting ring of the limiting guide sleeve. The center of the active valve 5 is provided with an inner hole for water flow, the bottom is closed and impermeable, the upper part is provided with a limiting step, and the lower end is provided with a water outlet hole 14 on the side.

[0038] The upper end of the nozzle holder 3 is installed in the inner hole of the upper end of the limiting guide sleeve 4, and the upper end of the nozzle holder 3 is matched with the inner hole clearance of the upper end of the limiting guide sleeve 4, and the matching clearance is 0.03mm~0.10mm. The lower surface of the upper end of the nozzle holder 3 is limited by the upper inner hole step of the limiting guide sleeve 4, and the upper end face of the nozzle holder 3 is limited by the lower end face of the upper joint 1. The upper end face of the nozzle holder 3 is flush with the upper end face of the limiting guide sleeve 4.

[0039] The lower end conduit of the nozzle holder 3 is inserted into the inner hole of the upper end of the valve 5. The nozzle holder 3 and the valve 5 are slidably sealed with a clearance of 0.05mm to 0.15mm. The valve 5 can slide up and down along the outer surface of the lower end conduit of the nozzle holder 3. Figure 2As shown, water holes 11 communicating with each other from top to bottom are evenly opened in the circumferential direction of the upper part of the nozzle holder 3.

[0040] The upper end of the impact hammer rod 6 is installed in the lower inner hole of the limiting guide sleeve 4. The impact hammer rod 6 and the limiting guide sleeve 4 are slidably sealed, and the clearance is 0.05mm to 0.15mm. A through hole 15 is provided in the center of the impact hammer rod 6, and an inner boring hole is provided on the through hole 15 of the impact hammer rod 6. The lower part of the active valve 5 is inserted into the inner boring hole of the impact hammer rod 6, and the outer cylindrical surface of the active valve 5 and the inner boring hole at the upper end of the impact hammer rod 6 form an annular space 13. A lateral water hole 16 is provided at the lower part of the impact hammer rod 6, and a guide groove 17 is provided at the bottom and the upper anvil contact surface of the impact anvil joint 9, and the depth of the guide groove is 1.5mm to 10mm.

[0041] The lower end of the impact hammer rod 6 and the upper end of the impact anvil joint 9 are both installed in the lower cylinder sleeve 8. The outer circle of the lower end of the impact hammer rod 6 is slidably sealed with the inner hole of the lower cylinder sleeve 8, and the fitting clearance is 0.05mm~0.15mm. The upper end of the impact anvil joint 9 is gap-matched with the inner hole of the lower cylinder sleeve 8, and the fitting clearance is 0.05mm~0.10mm.

[0042] The upper part of the impact anvil joint 9 is installed in the lower end of the outer tube 7, and the lower end of the outer tube 7 is connected to the upper part of the impact anvil joint 9 by threaded matching, and the lower part of the impact anvil joint 9 is connected to the drill bit or drilling tool. The lower part of the outer tube 7 is processed with a lower inner hole and a lower limit step that are concentric with the thread size diameter. The lower cylinder sleeve 8 is installed in the lower inner hole of the outer tube 7. The outer circle of the lower cylinder sleeve 8 and the lower inner hole of the outer tube 7 have a clearance match, and the clearance is 0.05mm to 0.10mm. The lower cylinder sleeve 8 is positioned up and down by the step of the lower inner hole of the outer tube 7 and the step of the impact anvil joint 9.

[0043] The working process of the high-efficiency injection-suction hydraulic impactor provided by the present invention is as follows:

[0044] Figure 1This is the initial working state of the high-efficiency injection-suction hydraulic impactor provided by the present invention. The upper limit step of the active valve 5 is suspended at the limit ring position of the limit guide sleeve 4. The lower end face of the active valve 5 and the upper end face of the central through hole 15 of the impact hammer rod 6 have a free travel distance h (h = 2mm ~ 60mm), and the distance between the upper end face of the active valve 5 and the upper lower plane of the nozzle 3 is the active valve travel H (H = 5mm ~ 100mm). The fluid passes through the inner hole channel of the hydraulic impactor drill string, through the center hole of the upper joint 1, and through the center hole of the nozzle 2 to generate a high-speed flow beam. The high-speed flow beam passes through the cavity space formed between the inner countersunk hole 10 of the upper joint 1 and the nozzle 3, and enters the inner hole of the active valve 5 through the upper opening and the center hole of the nozzle 3 to form diffusion. When the high-speed flow stream passes through the cavity space formed between the upper joint 1 and the nozzle 3, there is a flow velocity difference with the surrounding fluid, which causes the pressure of the liquid in the cavity space to decrease, and the pressure difference between the liquid outside the cavity and the liquid inside the cavity is formed. Under the action of the pressure difference, the liquid outside the cavity will be sucked into the cavity space through the water hole 11 on the upper part of the nozzle 3, and carried by the high-speed fluid flowing out of the nozzle 2 through the center hole of the nozzle 3 into the inner hole of the live valve 5. The liquid flows into the inner hole of the live valve 5, flows out through the water outlet hole 14 at the lower part of the live valve 5, passes through the free travel gap h between the lower end face of the live valve 5 and the upper end face of the impact hammer rod 6, enters the lower cylinder sleeve 8 through the through hole 15 of the impact hammer rod 6, and enters the drill bit or drill tool joint through the center hole of the impact anvil joint 9. When the fluid returns upward through the outer annular space of the drill bit or drill tool, the annular space resistance will produce a throttling effect.

[0045] The upper joint 1, the nozzle 2, the nozzle holder 3, and the limiting guide sleeve 4 form an injection and suction unit with fixed structural parameters. The high-speed fluid flowing out of the nozzle 2 continuously rolls and sucks the liquid flow. The cavity space formed between the inner countersunk hole 10 of the upper joint 1 and the nozzle holder 3 and the upper cavity of the limiting guide sleeve 4 are connected through the water holes 11 distributed on the upper circumference of the nozzle holder 3, and the upper cavity and lower cavity of the limiting guide sleeve 4 are connected through the circumferential longitudinal water groove 12. The cavity space formed between the inner countersunk hole 10 of the upper joint 1 and the nozzle holder 3, the upper cavity and the lower cavity of the limiting guide sleeve 4 are all low-pressure areas, and a pressure difference is formed between the upper and lower ends of the active valve 5 and the impact hammer rod 6. Since the mass of the live valve 5 is much smaller than that of the impact hammer rod 6, the live valve 5 moves upward before the impact hammer rod 5 under the action of the suction pressure difference. When it moves upward to the limit surface of the nozzle holder 3, the live valve 5 stops moving, and the stroke length is H; then, the impact hammer rod 6 moves upward under the action of the pressure difference. When it moves to the upper end surface of the through hole 15 of the impact hammer rod 6 and collides with the lower end surface of the live valve 5, the live valve 5 and the upper end surface of the through hole 15 of the impact hammer rod 6 are fitted and sealed, and the liquid flow channel flowing through the center of the impact hammer rod 6 by the free stroke h is cut off. The fluid pressure in the cavity space formed by the internal countersunk hole 10 of the upper joint 1 and the nozzle holder 3, and the upper and lower cavities of the limiting guide sleeve 4 suddenly increases (water hammer effect). Since the central waterway is instantly cut off, the huge water hammer pressure generated forces the live valve 5 and the impact hammer rod 6 to move downward quickly and start the stroke movement.

[0046] When the live valve 5 and the impact hammer rod 6 move downward to the limit position of the limit guide sleeve 4, the limit ring of the limit guide sleeve 4 hangs on the upper limit step of the live valve 5, preventing the live valve 5 from moving downward. The impact hammer rod 6 continues to move downward under the action of inertia, and the upper end face of the through hole 15 of the impact hammer rod 6 is separated from the lower end face of the live valve 5. After the free stroke h is completed, the bottom of the impact hammer rod 6 hits the anvil surface of the impact anvil joint 9, and the impact force is transmitted to the drill tool or drill bit connected to the hydraulic impactor through the impact anvil joint 9 to perform rock crushing work. At this time, since the upper end face of the channel 15 of the impact hammer rod 6 and the lower end face of the live valve 5 are separated by a distance h, the central waterway of the hydraulic impactor is restored and opened, and the live valve 5 and the impact hammer rod 6 start the return movement, and the next working cycle begins again, and the impact hammer rod 6 hits the anvil surface of the impact anvil joint 9 with a certain frequency and impact work, which is transmitted to the drill tool or drill bit connected to the hydraulic impactor through the transmission device to perform rock crushing work.

[0047] The upper joint 1, the nozzle 2, the nozzle support 3, and the limiting guide sleeve 4 form a fixed injection and suction unit, which has the characteristics of fixed injection and suction structural parameters. The fixed injection and suction unit is a special injection and suction function actuator, and the active valve 5 and the impact hammer rod 6 are special actuators, which changes the conventional injection and suction hydraulic impactor active valve and impact hammer are both injection and suction components and actuators, and solves the technical deficiencies of conventional injection and suction hydraulic impactors, such as the need for a larger working flow, low energy utilization, large starting flow, high pump pressure, and unstable performance. It improves the utilization rate of water energy, reduces the working flow and pressure of the impactor, broadens the working flow range of the injection and suction hydraulic impactor, enables the injection and suction hydraulic impactor to perform better under small flow conditions, and improves the working stability of the hydraulic impactor.

[0048] The present invention is described in detail above with reference to the accompanying drawings and embodiments, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of ordinary technicians in the field without departing from the purpose of the present invention. The contents not described in detail in the present invention can adopt the existing technology.

Claims

1. A high-efficiency injection-suction hydraulic impactor, characterized in that: The impactor comprises: an upper joint (1), a nozzle (2), a nozzle support (3), a limiting guide sleeve (4), a live valve (5), an impact hammer rod (6), an outer tube (7), a lower cylinder sleeve (8) and an impact anvil joint (9); the nozzle (2) is installed in the center hole of the upper joint (1), a limiting step is provided at the lower end of the outer side of the nozzle (2), and the nozzle (2) is fixed by the limiting step in the center hole of the upper joint (1); The lower part of the upper joint (1) is installed in the upper end of the outer tube (7), and the lower part of the upper joint (1) is matched and connected with the upper end of the outer tube (7); the upper part of the outer tube (7) is provided with an upper inner hole and an upper inner hole limiting step; the limiting guide sleeve (4) is installed in the upper inner hole of the outer tube (7) and is fixed by the upper inner hole limiting step of the outer tube (7); the outer surface of the limiting guide sleeve (4) is matched with the inner hole surface of the outer tube (7) in a sliding and sealing manner; the middle part of the limiting guide sleeve (4) is designed with a limiting ring with a center hole; the active valve (5) is installed in the center hole of the limiting ring of the limiting guide sleeve (4), and the upper limiting step of the active valve (5) is suspended on the limiting ring. The upper end of the nozzle holder (3) is installed in the inner hole of the upper end of the limiting guide sleeve (4), the upper end of the nozzle holder (3) and the inner hole of the upper end of the limiting guide sleeve (4) are matched with each other, the lower surface of the upper end of the nozzle holder (3) is limited by the upper inner hole step of the limiting guide sleeve (4), the upper end surface of the nozzle holder (3) is limited by the lower end surface of the upper joint (1), and the upper end surface of the nozzle holder (3) is flush with the upper end surface of the limiting guide sleeve (4); the lower end conduit of the nozzle holder (3) is inserted into the inner hole of the upper end of the active valve (5), and the outer surface of the nozzle holder (3) and the inner hole of the active valve (5) are matched in a sliding and sealing manner; The upper end of the impact hammer rod (6) is installed in the lower inner hole of the limiting guide sleeve (4), and the impact hammer rod (6) and the limiting guide sleeve (4) are slidably sealed. A through hole (15) is provided at the center of the impact hammer rod (6), and an inner boring hole is provided on the through hole (15) of the impact hammer rod (6). The lower part of the active valve (5) is inserted into the inner boring hole of the impact hammer rod (6), and the outer cylindrical surface of the active valve (5) and the inner boring hole at the upper end of the impact hammer rod (6) form an annular space (13). The lower end of the impact hammer rod (6) and the upper end of the impact anvil joint (9) are both installed in the lower cylinder sleeve (8), and the outer circle of the lower end of the impact hammer rod (6) is in sliding sealing cooperation with the inner hole of the lower cylinder sleeve (8); the upper end of the impact anvil joint (9) is in clearance cooperation with the inner hole of the lower cylinder sleeve (8); the upper part of the impact anvil joint (9) is installed in the lower end of the outer tube (7), and the upper part of the impact anvil joint (9) is in cooperation with the lower end of the outer tube (7); the lower part of the outer tube (7) is provided with a lower inner hole and a lower limiting step, and the lower cylinder sleeve (8) is installed in the lower inner hole of the outer tube (7), and the outer circle of the lower cylinder sleeve (8) is in clearance cooperation with the lower inner hole of the outer tube (7); the lower cylinder sleeve (8) is limited up and down by the lower inner hole step of the outer tube (7) and the step of the impact anvil joint (9).

2. A high-efficiency injection-suction hydraulic impactor according to claim 1, characterized in that: The lower end surface of the upper joint (1) is provided with an inner countersunk hole (10), and a cavity space is formed between the inner countersunk hole (10) and the nozzle holder (3).

3. A high-efficiency injection-suction hydraulic impactor according to claim 1, characterized in that: The upper part of the spray nozzle (3) is evenly provided with water holes (11) communicating with each other from top to bottom in the circumferential direction.

4. A high-efficiency injection-suction hydraulic impactor according to claim 1, characterized in that: The middle inner hole of the limiting guide sleeve (4) is provided with an upper cavity and a lower cavity at intervals, and the outer surface of the limiting guide sleeve (4) is processed with a longitudinal water groove (12) along the circumference, and the water groove (12) connects the upper cavity and the lower cavity.

5. The high-efficiency injection-suction hydraulic impactor according to claim 1 is characterized in that: The movable valve (5) is provided with an inner hole with a closed bottom at the center, and a water outlet hole (14) is provided at the side of the lower end.

6. A high-efficiency injection-suction hydraulic impactor according to claim 1, characterized in that: The lower part of the impact hammer rod (6) is provided with a lateral water hole (16), and the bottom and the upper anvil contact surface of the impact anvil joint (9) are provided with a guide groove (17).

7. A high-efficiency injection-suction hydraulic impactor according to claim 1, characterized in that: The nozzle (2) is installed in the center hole of the upper joint (1) by interference fit.

8. The high-efficiency injection-suction hydraulic impactor according to claim 1 is characterized in that: The lower part of the upper joint (1) is connected to the upper end of the outer tube (7) through threaded fitting.

9. The high-efficiency injection-suction hydraulic impactor according to claim 1, characterized in that: The upper part of the impact anvil joint (9) is connected to the lower end of the outer tube (7) through threaded fitting.

10. The high-efficiency injection-suction hydraulic impactor according to claim 1, characterized in that: The inner hole taper of the upper end of the center hole of the nozzle (2) is 0° to 150°, and the inner hole diameter of the lower end of the center hole is 1.5 mm to 50 mm.

11. A high-efficiency injection-suction hydraulic impactor according to claim 2, characterized in that: The depth of the inner countersunk hole (10) is 1 mm to 20 mm.

12. A high-efficiency injection-suction hydraulic impactor according to claim 6, characterized in that: The depth of the guide groove (17) is 1.5 mm to 10 mm.

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