Energy storage hydraulic impact hammer

Abstract

The invention relates to the field of pile foundation construction equipment, in particular to an energy storage hydraulic impact hammer which comprises a machine body and a pile cap, an anvil block is arranged between the pile cap and the machine body, a hammer core is slidably arranged on the machine body, an energy storage cylinder and a hydraulic pipe are arranged on the machine body, and an upper end base and a lower end base are arranged at the two ends of the hydraulic pipe correspondingly. The open end of the energy storage cylinder is arranged on the upper end seat, a piston is coaxially arranged in the energy storage cylinder in a sliding mode, a sealing air ring is arranged between the circumferential outer side wall of the piston and the circumferential inner side wall of the energy storage cylinder, an upper shaft rod coaxial with the hydraulic pipe is arranged on the upper end seat in a sliding and penetrating mode, one end of the upper shaft rod is coaxially arranged on the piston, and the other end of the upper shaft rod is coaxially provided with a lower shaft rod. The lower shaft rod penetrates through the lower end base in a sliding mode, the hammer core is arranged at the end, opposite to the upper shaft rod, of the lower shaft rod, a fixing ring is coaxially arranged on the upper shaft rod, a liquid isolation rubber ring is arranged between the fixing ring and the hydraulic pipe, and an impact assembly is arranged on the hydraulic pipe. The impact hammer has the effect of improving the impact force of the impact hammer.

Description

Technical Field

[0001] This application relates to the field of pile foundation construction equipment, and in particular to an energy storage hydraulic impact hammer. Background Technology

[0002] Hydraulic pile hammers, also known as hydraulic impact hammers, are mechanical devices that combine the power of an excavator, the weight of the equipment, and the weight of the pile to achieve efficient pile driving operations. Compared with traditional diesel pile hammers, they have advantages such as low noise, high efficiency, and low pollution.

[0003] The working principle of a traditional hydraulic impact hammer is that the hammer core is raised to the desired height by a lifting cylinder and then released quickly, so that the hammer core acts on the pile cap anvil connected below the hydraulic hammer in a manner close to free fall. After the anvil performs work on the precast pile body fitted inside the pile cap, the pile body is hammered into the ground.

[0004] Therefore, the impact force of a traditional hydraulic impact hammer mainly depends on the height that the hammer core can lift. As a result, traditional hydraulic impact hammers are designed to increase their length. However, since they need to be used in conjunction with an excavator, the maximum lifting power of the excavator's robotic arm will in turn limit the maximum weight of the hydraulic impact hammer. The maximum weight of the hydraulic impact hammer will ultimately limit its maximum length, thus greatly limiting the maximum impact force of the hydraulic impact hammer, which is a shortcoming. Summary of the Invention

[0005] In order to increase the impact force of an impact hammer within its inherent maximum length dimension, this application provides an energy-storage hydraulic impact hammer.

[0006] The energy storage hydraulic impact hammer provided in this application adopts the following technical solution: An energy-storing hydraulic impact hammer includes a body and a pile cap. An anvil is disposed between the pile cap and the body. A hammer core is slidably disposed on the body for impacting the anvil. An energy storage cylinder and a hydraulic pipe are disposed on the body. The energy storage cylinder is hollow inside and open at one end. An upper end seat and a lower end seat are respectively disposed at both ends of the hydraulic pipe. An oil outlet pipe communicating with the interior of the hydraulic pipe is disposed on the upper end seat, and an oil inlet pipe communicating with the interior of the hydraulic pipe is disposed on the lower end seat. The open end of the energy storage cylinder is disposed on the upper end seat. A piston is coaxially slidably disposed inside the energy storage cylinder. A sealing gas ring is disposed between the outer circumferential wall of the piston and the inner circumferential wall of the energy storage cylinder. An upper shaft, coaxial with the hydraulic pipe, slides through the seat. A first sealing element for sealing is provided between the upper shaft and the upper end seat. One end of the upper shaft is coaxially mounted on the piston, and the other end is coaxially mounted on a lower shaft. The lower shaft slides through the lower end seat. A second sealing element for sealing is provided between the lower end seat and the lower shaft. The hammer core is located at the end of the lower shaft facing away from the upper shaft. A fixing ring is coaxially mounted on the upper shaft. A liquid-separating rubber ring is provided between the outer circumferential wall of the fixing ring and the inner circumferential wall of the hydraulic pipe. An impact assembly is provided on the hydraulic pipe. The impact assembly is used to connect the spaces on both sides of the fixing ring along the axial direction of the hydraulic pipe.

[0007] By adopting the above technical solution, the hydraulic system of the excavator injects hydraulic oil into the inlet pipe on the lower end seat through the pipeline. Under the sealing action of the diaphragm rubber ring and the second seal, the pressure on the side of the fixed ring away from the energy storage cylinder continuously increases. The fixed ring drives the upper shaft to move closer to the energy storage cylinder. The upper shaft drives the hammer away from the anvil through the lower shaft. Under the combined action of the sealing gas ring and the first seal, the piston will compress the air in the energy storage cylinder away from the side of the upper end seat, and the space near the upper end seat of the piston will form a negative pressure until the upper shaft stops moving. At this time, the impact component connects the two sides of the fixed ring along the hydraulic pipe axis. The hydraulic oil from the inlet pipe will flow out from the outlet pipe. The pressure on the side of the fixed ring away from the energy storage cylinder drops sharply. The compressed air in the energy storage cylinder will quickly push the upper shaft to slide closer to the lower shaft through the piston. At the same time, under the action of the hammer's own weight, the lower shaft will drive the hammer to quickly impact the anvil, thereby increasing the impact force of the hammer.

[0008] Optionally, the impact assembly includes a valve disc coaxially rotatably mounted on the upper shaft. A plurality of fixing holes are provided on the fixing ring, evenly distributed circumferentially along the axis of the fixing ring. A plurality of valve holes are provided on the valve disc, each corresponding to one of the fixing holes and having the same size. The valve holes are also evenly distributed circumferentially along the axis of the valve disc. Two concentric fluid-conducting rubber rings of different sizes are provided between the fixing ring and the valve disc. Both the fixing holes and the valve holes are located between the two fluid-conducting rubber rings. When the fixing holes and valve holes are misaligned, hydraulic oil from the inlet pipe cannot flow directly out of the outlet pipe. An opening / closing element for driving the valve disc to rotate is provided on the hydraulic pipe.

[0009] By adopting the above technical solution, when the fixing hole and valve hole are completely misaligned, the hydraulic oil from the inlet pipe cannot flow out of the outlet pipe under the sealing effect of the liquid-conducting rubber ring and the liquid-separating rubber ring. At this time, the hydraulic oil pressure on the side of the fixing ring facing away from the energy storage cylinder will continuously increase. The fixing ring will drive the piston to move a certain distance through the upper shaft. When the opening and closing part drives the valve disc to rotate and connects the completely misaligned fixing hole and valve hole, the hydraulic oil flowing in from the inlet pipe will pass through the fixing hole and valve hole and finally flow to the outlet pipe. During this process, the hydraulic oil pressure on the side of the fixing ring facing away from the energy storage cylinder will drop sharply. The compressed air in the energy storage cylinder and the negative pressure formed, plus the weight of the hammer core, will cause the hammer core to quickly impact the anvil.

[0010] Optionally, the diameter of the lower shaft is larger than the diameter of the upper shaft, and there is a gap between the outer circumferential wall of the lower shaft and the inner circumferential wall of the hydraulic pipe.

[0011] By adopting the above technical solution, as the hammer moves away from the anvil, a small amount of hydraulic oil flowing into the inlet pipe can push the fixed ring to move quickly closer to the energy storage cylinder. As the hammer moves closer to the anvil, the difference in diameter between the upper and lower shafts creates a large spatial difference on both sides of the fixed ring. As the hydraulic oil flows through the fixing hole and valve hole to the outlet pipe, the fixed ring can move faster as it approaches the anvil, thereby increasing the impact force of the hammer on the anvil.

[0012] Optionally, the opening and closing component includes a limiting block disposed on the upper shaft. The valve disc has a fan-shaped clearance groove. The limiting block is located in the clearance groove of the valve disc. When the fixing hole and the valve hole are completely misaligned, the limiting block abuts against one side of the clearance groove. When the fixing hole and the valve hole are completely connected, the limiting block abuts against the other side of the clearance groove. The upper shaft is provided with a shaft C-shaped buckle. The shaft C-shaped buckle is located on the side of the valve disc facing away from the fixing ring. Multiple magnets are evenly arranged circumferentially on the outer circumferential wall of the valve disc. The magnetic poles of two adjacent magnets are opposite. A misaligned coil is coaxially sleeved at one end of the hydraulic pipe near the lower end seat. A through-hole coil is coaxially sleeved at one end of the hydraulic pipe near the upper end seat. Both the misaligned coil and the through-hole coil are electrically connected to the control system.

[0013] By adopting the above technical solution, during the process of the fixed ring driving the valve disc closer to the energy storage cylinder, when the magnet on the valve disc is subjected to the magnetic field formed by the through-hole coil, the magnet will drive the valve disc to rotate in the forward direction. Under the restriction of the angle limiting block, one side of the clearance groove on the valve disc will abut against the angle limiting block. At this time, the fixed hole and the valve hole are completely connected. The upper shaft drives the fixed ring to quickly approach the anvil until the hammer core impacts the anvil. At this time, the magnet on the valve disc will be in the magnetic field formed by the misalignment coil. The magnet will drive the valve disc to rotate in the reverse direction. When the fixed hole and the valve hole are completely misaligned, the hydraulic oil from the oil inlet pipe will push the upper shaft closer to the energy storage cylinder again through the fixed ring.

[0014] Optionally, multiple through-hole coils are evenly arranged along the axial direction of the hydraulic pipe.

[0015] By adopting the above technical solution, on the one hand, the fixed ring can drive the valve disc to move to the positions of different through-hole coils, thereby obtaining impact effects of different impact forces. On the other hand, as the upper shaft approaches the anvil, multiple energized through-hole coils can form multiple accelerating magnetic fields, thereby applying an electromagnetic acceleration effect to the upper shaft approaching the anvil. Furthermore, by adjusting the power of the through-hole coils, different impact forces can be achieved.

[0016] Optionally, the first seal includes a plurality of first sealing rings sleeved on the upper shaft, and the upper end seat has a plurality of first receiving grooves for accommodating the first sealing rings, with the first sealing rings and the first receiving grooves corresponding one to one.

[0017] By adopting the above technical solution, the possibility of hydraulic oil leakage from the inlet pipe is reduced, and at the same time, the effect of creating negative pressure on the side of the piston near the upper end seat is improved.

[0018] Optionally, the second seal includes a sealing seat coaxially sleeved on the lower shaft, a sealing ring is provided between the sealing seat and the lower end seat, the sealing seat is detachably mounted on the lower end seat, a second sealing ring is provided between the sealing seat and the lower shaft, the second sealing ring is sleeved on the lower shaft, and a second receiving groove is provided on the sealing seat for accommodating the second sealing ring.

[0019] By adopting the above technical solution, the possibility of hydraulic oil leakage from the inlet pipe is reduced, and the pressurization effect of the fixed ring on the side away from the energy storage cylinder is improved.

[0020] Optionally, vibration-damping rubber is provided between the lower shaft and the hammer core.

[0021] By adopting the above technical solution, the vibration damping rubber can absorb the impact force when the hammer core hits the anvil, thereby reducing the impact force transmitted to the lower shaft and thus reducing the possibility of damage to the lower shaft.

[0022] In summary, this application includes at least one of the following beneficial technical effects: The hydraulic system on the excavator injects hydraulic oil into the inlet pipe on the lower end seat through pipelines. Under the sealing action of the diaphragm rubber ring and the second seal, the pressure on the side of the fixed ring away from the energy storage cylinder continuously increases. The fixed ring drives the upper shaft to move closer to the energy storage cylinder. The upper shaft drives the hammer away from the anvil through the lower shaft. Under the combined action of the sealing gas ring and the first seal, the piston will compress the air in the energy storage cylinder away from the upper end seat. The space near the upper end seat of the piston will form a negative pressure until the upper shaft stops moving. At this time, the impact assembly connects the two sides of the fixed ring along the hydraulic pipe axis. The hydraulic oil from the inlet pipe will flow out from the outlet pipe. The pressure on the side of the fixed ring away from the energy storage cylinder drops sharply. The compressed air in the energy storage cylinder will quickly push the upper shaft to slide closer to the lower shaft through the piston. At the same time, under the action of the hammer's own weight, the lower shaft will drive the hammer to quickly impact the anvil, thereby increasing the impact force of the hammer. When the fixed hole and the valve hole are completely misaligned, the hydraulic oil from the inlet pipe cannot flow out through the outlet pipe due to the sealing effect of the fluid-conducting rubber ring and the fluid-separating rubber ring. At this time, the hydraulic oil pressure on the side of the fixed ring facing away from the energy storage cylinder will continuously increase. The fixed ring will drive the piston to move a certain distance through the upper shaft. When the opening and closing parts drive the valve disc to rotate and connect the completely misaligned fixed hole and the valve hole, the hydraulic oil flowing in from the inlet pipe will pass through the fixed hole and the valve hole and finally flow to the outlet pipe. During this process, the hydraulic oil pressure on the side of the fixed ring facing away from the energy storage cylinder will drop sharply. The compressed air in the energy storage cylinder and the negative pressure formed, plus the weight of the hammer core, will cause the hammer core to quickly impact the anvil. During the process of the fixed ring driving the valve disc closer to the energy storage cylinder, when the magnet on the valve disc is subjected to the magnetic field formed by the through-hole coil, the magnet will drive the valve disc to rotate in the forward direction. Under the restriction of the angle limit block, one side of the clearance groove on the valve disc will abut against the angle limit block. At this time, the fixed hole and the valve hole are completely connected. The upper shaft drives the fixed ring to quickly approach the anvil until the hammer core impacts the anvil. At this time, the magnet on the valve disc will be in the magnetic field formed by the misalignment coil. The magnet will drive the valve disc to rotate in the reverse direction. When the fixed hole and the valve hole are completely misaligned, the hydraulic oil from the oil inlet pipe will push the upper shaft closer to the energy storage cylinder again through the fixed ring. On the one hand, the fixed ring can move the valve disc to the positions of different through-hole coils, thereby obtaining impact effects of different impact forces. On the other hand, as the upper shaft approaches the anvil, multiple energized through-hole coils can form multiple accelerating magnetic fields, thereby applying an electromagnetic acceleration effect to the upper shaft approaching the anvil. Furthermore, by adjusting the power of the through-hole coils, different impact forces can be achieved. Attached Figure Description

[0023] Figure 1 This is a structural schematic diagram of an embodiment of this application.

[0024] Figure 2 This is a cross-sectional view used in the embodiments of this application to illustrate the positional relationship between the energy storage cylinder, hydraulic pipe and lower shaft.

[0025] Figure 3 yes Figure 2 Enlarged view of section A.

[0026] Figure 4 yes Figure 2 Enlarged view of section B.

[0027] Figure 5 yes Figure 2 Enlarged view of section C.

[0028] Explanation of reference numerals in the attached drawings: 1. Machine body; 2. Pile cap; 3. Anvil; 4. Hammer core; 5. Energy storage cylinder; 6. Hydraulic pipe; 7. Upper end seat; 8. Lower end seat; 9. Oil outlet pipe; 10. Oil inlet pipe; 11. Piston; 12. Sealing ring; 13. Upper shaft; 14. First seal; 141. First sealing ring; 142. First receiving groove; 15. Lower shaft; 16. Second seal; 161. Sealing seat; 162. Sealing ring plate; 163. Second sealing ring; 164. Second receiving groove; 17. Fixing ring; 18. Liquid-separating rubber ring; 19. Impact assembly; 191. Valve disc; 192. Fixing hole; 193. Valve hole; 194. Liquid-passing rubber ring; 195. Opening and closing part; 1951. Angle limiting block; 1952. Clearance groove; 1953. Shaft C-shaped buckle; 1954. Magnet; 1955. Misaligned coil; 1956. Through-hole coil; 20. Vibration damping rubber. Detailed Implementation

[0029] The following is in conjunction with the appendix Figures 1-5 This application will be described in further detail.

[0030] This application discloses an energy storage hydraulic impact hammer.

[0031] Reference Figure 1 and Figure 2 An energy storage hydraulic impact hammer includes a body 1 and a pile cap 2. The pile cap 2 is used to fit on the top of the pile column. An anvil 3 is arranged between the pile cap 2 and the body 1. The anvil 3 is bolted to the body 1. A hammer core 4 is slidably arranged on the body 1. The hammer core 4 is used to strike the anvil 3. An energy storage cylinder 5 and a hydraulic pipe 6 are bolted to the body 1. The energy storage cylinder 5 is hollow inside and open at one end. The two ends of the hydraulic pipe 6 are respectively welded with an upper end seat 7 and a lower end seat 8.

[0032] Reference Figure 2 and Figure 3 An oil outlet pipe 9, which communicates with the inside of the hydraulic pipe 6, is welded to the upper end seat 7, and an oil inlet pipe 10, which communicates with the inside of the hydraulic pipe 6, is welded to the lower end seat 8. Both the oil outlet pipe 9 and the oil inlet pipe 10 are connected to the hydraulic system of the excavator through pipes. The open end of the energy storage cylinder 5 is welded to the upper end seat 7.

[0033] Reference Figure 3 A piston 11 is coaxially slidably arranged inside the energy storage cylinder 5. Multiple sealing rings 12 are arranged between the outer circumferential wall of the piston 11 and the inner circumferential wall of the energy storage cylinder 5. The multiple sealing rings 12 are arranged along the axial direction of the energy storage cylinder 5.

[0034] Reference Figure 2 and Figure 3 An upper shaft 13, coaxial with the hydraulic pipe 6, slides through the upper end seat 7. A first sealing element 14 for sealing is arranged between the upper shaft 13 and the upper end seat 7. The first sealing element 14 includes a plurality of first sealing rings 141 sleeved on the upper shaft 13. A plurality of first receiving grooves 142 for accommodating the first sealing rings 141 are provided on the upper end seat 7. The first sealing rings 141 and the first receiving grooves 142 correspond one-to-one.

[0035] Reference Figure 2 , Figure 3 and Figure 4 One end of the upper shaft 13 is coaxially welded to the piston 11, and the other end is coaxially and integrally formed with a lower shaft 15. The diameter of the lower shaft 15 is larger than that of the upper shaft 13. There is a gap between the outer circumferential wall of the lower shaft 15 and the inner circumferential wall of the hydraulic pipe 6. The lower shaft 15 slides through the lower end seat 8. A second seal 16 for sealing is arranged between the lower end seat 8 and the lower shaft 15.

[0036] Reference Figure 2 and Figure 5 The second sealing element 16 includes a sealing seat 161 coaxially sleeved on the lower shaft 15, and a sealing ring 162 arranged between the sealing seat 161 and the lower end seat 8. The sealing ring 162 can be made of hydrogenated nitrile rubber in the prior art. The sealing seat 161 is bolted to the lower end seat 8.

[0037] Reference Figure 5 A second sealing ring 163 is arranged between the sealing seat 161 and the lower shaft 15. The second sealing ring 163 can be made of hydrogenated nitrile rubber in the prior art. The second sealing ring 163 is sleeved on the lower shaft 15. A second receiving groove 164 for accommodating the second sealing ring 163 is provided on the sealing seat 161.

[0038] Reference Figure 2 and Figure 4 Hammer core 4 is arranged at one end of the lower shaft 15 away from the upper shaft 13. A damping rubber 20 is bolted between the lower shaft 15 and the hammer core 4. The damping rubber 20 can be made of modified nitrile rubber material. A fixing ring 17 is coaxially welded on the upper shaft 13. A liquid-separating rubber ring 18 is arranged between the outer circumferential wall of the fixing ring 17 and the inner circumferential wall of the hydraulic pipe 6.

[0039] The hydraulic system on the excavator injects hydraulic oil into the oil inlet pipe 10 on the lower end seat 8 through the pipeline. Under the sealing action of the liquid diaphragm rubber ring 18, the sealing ring 162, and the second sealing ring 163, the pressure on the side of the fixed ring 17 facing away from the energy storage cylinder 5 continuously increases. Since the diameter of the lower shaft 15 is larger than the diameter of the upper shaft 13, the fixed ring 17 drives the upper shaft 13 to quickly approach the energy storage cylinder 5.

[0040] The upper shaft 13 drives the hammer core 4 to move away from the anvil 3 quickly via the lower shaft 15. At the same time, under the sealing effect of the sealing gas ring 12 and the first sealing ring 141, the piston 11 will compress the air on the side of the energy storage cylinder 5 away from the upper end seat 7, and the space on the side of the piston 11 near the upper end seat 7 will form a negative pressure until the upper shaft 13 drives the piston 11 to stop moving. At this time, the energy storage in the energy storage cylinder 5 is completed.

[0041] Reference Figure 2 and Figure 4 An impact assembly 19 is arranged on the hydraulic pipe 6. The impact assembly 19 is used to connect the space on both sides of the fixed ring 17 along the axial direction of the hydraulic pipe 6.

[0042] Reference Figure 2 and Figure 4The impact assembly 19 includes a valve disc 191 coaxially rotatably sleeved on the upper shaft 13. A plurality of fixing holes 192 are provided on the fixing ring 17, and the plurality of fixing holes 192 are evenly distributed circumferentially along the axis of the fixing ring 17. A plurality of valve holes 193 are provided on the valve disc 191, and the valve holes 193 correspond one-to-one with the fixing holes 192 and have the same size. The plurality of valve holes 193 are evenly distributed circumferentially along the axis of the valve disc 191.

[0043] Reference Figure 2 and Figure 4 Two concentric fluid-conducting rubber rings 194 of different sizes are arranged between the fixing ring 17 and the valve disc 191. The fluid-conducting rubber rings 194 can be made of hydrogenated nitrile rubber, which is available in the prior art. The fixing hole 192 and the valve hole 193 are both located between the two fluid-conducting rubber rings 194. When the fixing hole 192 and the valve hole 193 are misaligned, the hydraulic oil from the oil inlet pipe 10 cannot flow directly out of the oil outlet pipe 9. The hydraulic pipe 6 is provided with an opening and closing part 195 that drives the valve disc 191 to rotate.

[0044] Reference Figure 2 and Figure 4 The opening and closing component 195 includes a limiting block 1951 welded to the outer surface of the upper shaft 13. A clearance groove 1952 with a fan-shaped cross-section is provided on the valve disc 191. The limiting block 1951 is located in the clearance groove 1952 of the valve disc 191. When the fixing hole 192 and the valve hole 193 are completely misaligned, the limiting block 1951 abuts against one side of the clearance groove 1952.

[0045] Reference Figure 2 and Figure 4 When the fixing hole 192 and the valve hole 193 are fully connected, the limiting block 1951 abuts against the other side of the clearance groove 1952. The upper shaft rod 13 is clamped with a shaft C-shaped buckle 1953. The shaft C-shaped buckle 1953 is located on the side of the valve disc 191 facing away from the fixing ring 17. The shaft C-shaped buckle 1953 is attached to the valve disc 191. Multiple magnets 1954 are evenly embedded in the circumferential outer wall of the valve disc 191. The magnetic poles of two adjacent magnets 1954 are opposite.

[0046] Reference Figure 2 , Figure 3 and Figure 4 A misaligned coil 1955 is coaxially sleeved at one end of the hydraulic pipe 6 near the lower end seat 8, and multiple through-hole coils 1956 are coaxially sleeved at one end of the hydraulic pipe 6 near the upper end seat 7. The multiple through-hole coils 1956 are evenly arranged along the axial direction of the hydraulic pipe 6. Both the misaligned coil 1955 and the through-hole coils 1956 are electrically connected to the control system.

[0047] The control system energizes the through-hole coil 1956. After being energized, the through-hole coil 1956 will generate a magnetic field. Under the action of the magnetic field, the magnet 1954 will drive the valve disc 191 to rotate in the forward direction. Under the restriction of the angle limit block 1951, one side of the clearance groove 1952 on the valve disc 191 will abut against the angle limit block 1951. At this time, the fixing hole 192 and the valve hole 193 will be completely connected.

[0048] At this time, the hydraulic oil from the inlet pipe 10 will flow quickly through the fixed hole 192 and the valve hole 193 to the outlet pipe 9. The pressure on the side of the fixed ring 17 facing away from the energy storage cylinder 5 will decrease sharply, and the compressed air pressure in the energy storage cylinder 5 will be released quickly. The piston 11 will push the upper shaft 13 to slide quickly in the direction close to the anvil 3.

[0049] At the same time, multiple energized through-hole coils 1956 can form multiple accelerating magnetic fields, thereby applying an electromagnetic acceleration effect to the upper shaft 13 near the anvil 3. When the body 1 is arranged vertically, under the action of the gravity of the lower shaft 15, the upper shaft 13 and the hammer core 4, the hammer core 4 will quickly impact the anvil 3.

[0050] The valve disc 191 is located at different positions corresponding to the through-hole coils 1956, and the different magnetic field output power of the through-hole coils 1956 can make the hammer core 4 receive different magnitudes of impact force. When the hammer core 4 impacts the anvil 3, the magnet 1954 on the valve disc 191 will be in the magnetic field formed by the misaligned coil 1955, and the magnet 1954 will drive the valve disc 191 to rotate in the opposite direction.

[0051] When the fixed hole 192 and the valve hole 193 are completely misaligned, the hydraulic oil from the inlet pipe 10 cannot flow out of the hydraulic pipe 6. At this time, the pressure on the side of the fixed ring 17 near the hammer core 4 will increase again, and the fixed ring 17 will push the upper shaft 13 closer to the energy storage cylinder 5 until the fixed ring 17 drives the valve disc 191 to move to the position of the through hole coil 1956 again. This process can be repeated.

[0052] The implementation principle of the energy storage hydraulic impact hammer in this application embodiment is as follows: the hydraulic system on the excavator injects hydraulic oil into the oil inlet pipe 10 on the lower end seat 8 through the pipeline. Under the sealing action of the liquid diaphragm rubber ring 18, the sealing ring 162 and the second sealing ring 163, the pressure on the side of the fixed ring 17 facing away from the energy storage cylinder 5 continuously increases. Since the diameter of the lower shaft 15 is larger than the diameter of the upper shaft 13, the fixed ring 17 drives the upper shaft 13 to quickly approach the energy storage cylinder 5.

[0053] The upper shaft 13 drives the hammer core 4 to move away from the anvil 3 quickly via the lower shaft 15. At the same time, under the sealing effect of the sealing gas ring 12 and the first sealing ring 141, the piston 11 will compress the air on the side of the energy storage cylinder 5 away from the upper end seat 7, and the space on the side of the piston 11 near the upper end seat 7 will form a negative pressure until the upper shaft 13 drives the piston 11 to stop moving. At this time, the energy storage in the energy storage cylinder 5 is completed.

[0054] The control system energizes the through-hole coil 1956. After being energized, the through-hole coil 1956 will generate a magnetic field. Under the action of the magnetic field, the magnet 1954 will drive the valve disc 191 to rotate in the forward direction. Under the restriction of the angle limit block 1951, one side of the clearance groove 1952 on the valve disc 191 will abut against the angle limit block 1951. At this time, the fixing hole 192 and the valve hole 193 will be completely connected.

[0055] At this time, the hydraulic oil from the inlet pipe 10 will flow quickly through the fixed hole 192 and the valve hole 193 to the outlet pipe 9. The pressure on the side of the fixed ring 17 facing away from the energy storage cylinder 5 will decrease sharply, and the compressed air pressure in the energy storage cylinder 5 will be released quickly. The piston 11 will push the upper shaft 13 to slide quickly in the direction close to the anvil 3.

[0056] At the same time, multiple energized through-hole coils 1956 can form multiple accelerating magnetic fields, thereby applying an electromagnetic acceleration effect to the upper shaft 13 near the anvil 3. When the body 1 is arranged vertically, under the action of the gravity of the lower shaft 15, the upper shaft 13 and the hammer core 4, the hammer core 4 will quickly impact the anvil 3.

[0057] The valve disc 191 is located at different positions corresponding to the through-hole coils 1956, and the different magnetic field output power of the through-hole coils 1956 can make the hammer core 4 receive different magnitudes of impact force. When the hammer core 4 impacts the anvil 3, the magnet 1954 on the valve disc 191 will be in the magnetic field formed by the misaligned coil 1955, and the magnet 1954 will drive the valve disc 191 to rotate in the opposite direction.

[0058] When the fixed hole 192 and the valve hole 193 are completely misaligned, the hydraulic oil from the inlet pipe 10 cannot flow out of the hydraulic pipe 6. At this time, the pressure on the side of the fixed ring 17 near the hammer core 4 will increase again, and the fixed ring 17 will push the upper shaft 13 closer to the energy storage cylinder 5 until the fixed ring 17 drives the valve disc 191 to move to the position of the through hole coil 1956 again. This process can be repeated.

[0059] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An energy-storing hydraulic impact hammer, comprising a body (1) and a pile cap (2), wherein an anvil (3) is disposed between the pile cap (2) and the body (1), and a hammer core (4) is slidably disposed on the body (1), the hammer core (4) being used to impact the anvil (3), characterized in that: The body (1) is provided with an energy storage cylinder (5) and a hydraulic pipe (6). The energy storage cylinder (5) is hollow inside and open at one end. The hydraulic pipe (6) is provided with an upper end seat (7) and a lower end seat (8) at both ends. The upper end seat (7) is provided with an oil outlet pipe (9) communicating with the inside of the hydraulic pipe (6). The lower end seat (8) is provided with an oil inlet pipe (10) communicating with the inside of the hydraulic pipe (6). The open end of the energy storage cylinder (5) is provided on the upper end seat (7). A piston (11) is slidably arranged coaxially inside the energy storage cylinder (5). A sealing gas ring (12) is provided between the outer circumferential wall of the piston (11) and the inner circumferential wall of the energy storage cylinder (5). An upper shaft (13) coaxial with the hydraulic pipe (6) is slidably passed through the upper end seat (7). The upper shaft (13) and the upper end seat (7) are connected. A first sealing element (14) for sealing is provided between the upper shaft (13) and the piston (11). One end of the upper shaft (13) is coaxially provided on the piston (11), and the other end is coaxially provided with a lower shaft (15). The lower shaft (15) slides through the lower end seat (8). A second sealing element (16) for sealing is provided between the lower end seat (8) and the lower shaft (15). The hammer core (4) is provided at the end of the lower shaft (15) facing away from the upper shaft (13). A fixing ring (17) is coaxially provided on the upper shaft (13). A liquid-separating rubber ring (18) is provided between the outer circumferential wall of the fixing ring (17) and the inner circumferential wall of the hydraulic pipe (6). An impact assembly (19) is provided on the hydraulic pipe (6). The impact assembly (19) is used to connect the space on both sides of the fixing ring (17) along the axial direction of the hydraulic pipe (6).

2. The energy storage hydraulic impact hammer according to claim 1, characterized in that: The impact assembly (19) includes a valve disc (191) coaxially rotatably mounted on the upper shaft (13). A plurality of fixing holes (192) are provided on the fixing ring (17), and these fixing holes (192) are evenly distributed circumferentially along the axis of the fixing ring (17). A plurality of valve holes (193) are provided on the valve disc (191), and each valve hole (193) corresponds to one of the fixing holes (192) and has the same size. The plurality of valve holes (193) are evenly distributed circumferentially along the axis of the valve disc (191). The distribution includes two concentric but different-sized fluid-conducting rubber rings (194) between the fixing ring (17) and the valve disc (191). The fixing hole (192) and the valve hole (193) are both located between the two fluid-conducting rubber rings (194). When the fixing hole (192) and the valve hole (193) are misaligned, the hydraulic oil from the oil inlet pipe (10) cannot flow directly out from the oil outlet pipe (9). The hydraulic pipe (6) is provided with an opening and closing part (195) that drives the valve disc (191) to rotate.

3. The energy storage hydraulic impact hammer according to claim 2, characterized in that: The diameter of the lower shaft (15) is larger than the diameter of the upper shaft (13), and there is a gap between the outer circumferential wall of the lower shaft (15) and the inner circumferential wall of the hydraulic pipe (6).

4. The energy storage hydraulic impact hammer according to claim 3, characterized in that: The opening / closing component (195) includes a limiting block (1951) disposed on the upper shaft (13). The valve disc (191) has a fan-shaped clearance groove (1952) on its surface. The limiting block (1951) is located within the clearance groove (1952) of the valve disc (191). When the fixing hole (192) and the valve hole (193) are completely misaligned, the limiting block (1951) abuts against one side of the clearance groove (1952). When the fixing hole (192) and the valve hole (193) are fully connected, the limiting block (1951) abuts against the other side of the clearance groove (1952). The upper shaft (195) 3) A shaft C-shaped buckle (1953) is provided on the valve disc (191) on the side facing away from the fixing ring (17). A plurality of magnets (1954) are evenly arranged on the circumferential outer wall of the valve disc (191). The magnetic poles of two adjacent magnets (1954) are opposite. A misaligned coil (1955) is coaxially sleeved on one end of the hydraulic pipe (6) near the lower end seat (8). A through-hole coil (1956) is coaxially sleeved on one end of the hydraulic pipe (6) near the upper end seat (7). The misaligned coil (1955) and the through-hole coil (1956) are both electrically connected to the control system.

5. The energy storage hydraulic impact hammer according to claim 4, characterized in that: Multiple through-hole coils (1956) are evenly arranged along the axial direction of the hydraulic pipe (6).

6. The energy storage hydraulic impact hammer according to claim 1, characterized in that: The first sealing element (14) includes a plurality of first sealing rings (141) sleeved on the upper shaft (13), and the upper end seat (7) is provided with a plurality of first receiving grooves (142) for accommodating the first sealing rings (141), and the first sealing rings (141) and the first receiving grooves (142) correspond one to one.

7. The energy storage hydraulic impact hammer according to claim 1, characterized in that: The second sealing element (16) includes a sealing seat (161) coaxially sleeved on the lower shaft (15), a sealing ring (162) is provided between the sealing seat (161) and the lower end seat (8), the sealing seat (161) is detachably mounted on the lower end seat (8), a second sealing ring (163) is provided between the sealing seat (161) and the lower shaft (15), the second sealing ring (163) is sleeved on the lower shaft (15), and a second receiving groove (164) is provided on the sealing seat (161) for accommodating the second sealing ring (163).

8. The energy storage hydraulic impact hammer according to claim 1, characterized in that: A damping rubber (20) is provided between the lower shaft (15) and the hammer core (4).

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