High-performance oscillating hydraulic impactor

Abstract

The invention provides a high-performance oscillating hydraulic impactor. The high-performance oscillating hydraulic impactor comprises an upper connector, an outer pipe, a piston and an anvil. The upper connector is arranged at the first end of the outer pipe, the anvil is arranged at the second end of the outer pipe, and the piston is arranged in the outer pipe and located between the upper connector and the anvil. The axial size of the upper connector is set to be relatively small, and the axial size of the part, close to the first end and with the smaller outer diameter, of the piston is set to be relatively large, so that the first end of the piston can be kept in the fluid channel of the upper connector and is close to the first end of the upper connector as far as possible, and it is ensured that hydraulic pressure borne by the end face of the first end of the piston is maximum; under the condition that the axial size of the outer pipe is set to be large, the piston can ensure that the impact force of forward impact is maximum, the performance of the hydraulic impactor is improved, meanwhile, the reliability is improved, and the service life is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of hydraulic impactors, and particularly to a high-performance oscillating hydraulic impactor. Background Art

[0002] As an important type of percussion rotary drill tool, the hydraulic impactor uses mud as the driving medium and has been successfully applied in multiple professional fields such as solid mineral exploration, oil and gas drilling, and geothermal drilling. Through long-term theoretical research and repeated tests, the structure of the hydraulic impactor has been continuously improved. However, it cannot be ignored that there are still a series of bottleneck problems in this technology, such as complex internal structure, vulnerable key components being easily eroded and worn, limited overall service life, insufficient impact work capacity, etc., which make it difficult to achieve large-scale popularization and application in the industry.

[0003] Therefore, developing a new type of hydraulic impactor with advantages such as simple structure, few vulnerable parts, strong impact power, and long service life has important practical significance for shortening the drilling construction period, reducing the risk of downhole accidents, and reducing the comprehensive engineering cost in the field of deep resource exploration and development.

[0004] In the existing publicly available technical solutions, conventional hydraulic impactors usually adopt a structure with a pilot valve core arranged in the cylinder body, and the impact operation is achieved by controlling the hammer through the valve core. However, this type of structure has significant limitations: the impact performance is limited by the coupling of the parameters of the pilot valve core and the hammer, with poor reliability, and due to the split structure, there are many vulnerable parts, and the overall service life is relatively low under high-frequency and high-intensity operating conditions. Some jet-type hydraulic impactors cancel the pilot valve core structure and use fixed jet elements to control the movement of the hammer, but the hammer is usually composed of an interference fit between the piston and the hammer body. Due to the limited strength of the piston body, there are multiple sealing interfaces between the piston and the cylinder body, and a buffer structure needs to be introduced to reduce the impact of the hammer during its return stroke on the jet element. The overall structure still has weak links. Although this solution improves the impact performance to a certain extent, its reliability and durability still need to be further optimized, and systematic structural improvement and key technology breakthroughs are urgently needed to meet the long-term stable operation requirements under complex working conditions. Summary of the Invention

[0005] The purpose of the present invention is: aiming at the deficiencies in the above background art, to provide a hydraulic impactor with an integrated pilot valve core and piston, fewer vulnerable parts, and more efficient and reliable impact.

[0006] To achieve the above purpose, the present invention provides a high-performance oscillating hydraulic impactor, including an upper sub, an outer tube, a piston, and an anvil; the upper sub is arranged at the first end of the outer tube, the anvil is arranged at the second end of the outer tube, and the piston is arranged inside the outer tube and located between the upper sub and the anvil;

[0007] The upper joint is provided with an upper joint fluid passage. The first end of the upper joint fluid passage is a liquid inlet, and the liquid inlet maintains a preset liquid inlet pressure. The second end of the upper joint fluid passage is docked with the first end of the piston, so that liquid enters the fluid passage provided inside the piston. The anvil is provided with an anvil fluid passage. The second end of the anvil fluid passage is a liquid outlet, and the first end of the anvil fluid passage is docked with the second end of the piston;

[0008] The outer diameter sizes of the first end and the second end of the piston are set to be smaller than the size of the middle part. When the piston moves in the outer tube, the first end of the piston can move relative to the upper joint fluid passage, the second end of the piston can move relative to the anvil fluid passage, and the middle part of the piston can contact the end face of the first end of the anvil to exert an impact on the anvil;

[0009] The space between the middle part of the piston and the end face of the second end of the upper joint is the first cavity, and the space between the middle part of the piston and the end face of the first end of the anvil is the second cavity. The first cavity communicates with the outside and the pressure remains constant. The end face of the first end of the piston is constantly subjected to the liquid pressure in the upper joint fluid passage;

[0010] A jet element is arranged inside the piston, and the jet element is used to switch the liquid to enter the anvil fluid passage or the second cavity.

[0011] Further, the first end of the piston is kept inserted into the upper joint fluid passage, and the second end of the piston is kept inserted into the anvil fluid passage.

[0012] Further, the first end of the piston is provided with an upper piston fluid passage, and the second end of the piston is provided with a lower piston fluid passage. The upper piston fluid passage communicates with the upper joint fluid passage, and the lower piston fluid passage communicates with the anvil fluid passage.

[0013] Further, the first end of the outer tube and the upper joint are connected by internal and external threads, and the depth of insertion of the upper joint into the outer tube can be adjusted to adjust the maximum liquid pressure received by the end face of the first end of the piston.

[0014] Further, a sealing structure is provided between the first end of the piston and the upper joint fluid passage, between the second end of the piston and the anvil fluid passage, and between the middle part of the piston and the inner wall of the outer tube.

[0015] Further, the jet element includes a nozzle, an oscillation chamber, and a discharge cavity. The first end of the nozzle is in fluid communication with the upper part of the piston, the second end of the nozzle is in communication with the oscillation chamber. The oscillation chamber is configured in a gradually expanding form and has a first attached wall side and a second attached wall side. There is a first feedback channel between the position of the first attached wall side near the second end of the oscillation chamber and the first end of the oscillation chamber, and a second feedback channel between the position of the second attached wall side near the second end of the oscillation chamber and the first end of the oscillation chamber. The discharge cavity is in communication with the second attached wall side;

[0016] An oscillation chamber first output channel and an oscillation chamber second output are further provided in the piston. The oscillation chamber first output channel is in fluid communication with the lower fluid channel of the piston, and the oscillation chamber second output channel communicates to the outside of the piston and is in communication with the second cavity.

[0017] Further, the nozzle is configured in a reducing form, and the size of the first end of the nozzle gradually decreases towards the second end, so that the liquid accelerates into the oscillation chamber.

[0018] Further, a deflector block and a sharp wedge are provided in the oscillation chamber. The sharp wedge is provided at the second end of the oscillation chamber, the deflector blocks are provided on both sides of the oscillation chamber near the first end, the discharge cavity is directly formed on the corresponding deflector block, and a smooth arc groove is provided at the tip of the sharp wedge.

[0019] Further, a lower layer discharge channel is further provided in the piston. One end of the lower layer discharge channel is in communication with the discharge cavity, and the other end of the lower layer discharge channel is in communication with the lower fluid channel of the piston through a lower layer connection channel.

[0020] Further, an upper layer discharge channel is further provided in the piston. One end of the upper layer discharge channel is in communication with the first cavity, and the other end of the upper layer discharge channel is in communication with the discharge cavity through an upper layer connection channel.

[0021] The above solution of the present invention has the following beneficial effects:

[0022] For the high-performance oscillating hydraulic impactor provided by the present invention, the axial dimension of the upper joint is set relatively small, while the axial dimension of the part of the piston with a relatively small outer diameter near the first end is set relatively large, so that the first end of the piston can be kept in the fluid channel of the upper joint and as close as possible to the first end of the upper joint, ensuring that the hydraulic pressure received by the end face of the first end of the piston is the largest. In the case where the axial dimension of the outer tube is set relatively large, the piston can ensure that the impact force of forward impact is the largest, improving the performance of the hydraulic impactor and being adjustable;

[0023] Compared with the traditional method of setting the impact hammer and the piston separately, where the piston drives the impact hammer to move, the high-frequency piston movement is likely to cause fatigue damage to the impact hammer connecting rod, reducing the service life of the device. In the present invention, the piston adopts an integral structure, which can directly use the corresponding position of the piston as the impact surface and rigidly contact the end face of the first end of the anvil, thereby reducing the vulnerable parts. At the same time, there is no need to set structures such as sleeves in the outer tube, enabling the middle dimension of the piston to be set to the maximum, increasing the impact area and improving the impact efficiency;

[0024] Compared with the traditional method of symmetrically setting the left and right sides of the jet-type hydraulic impactor, in the present invention, through the asymmetric channel setting, only one output channel is connected to the fluid channel at the lower part of the piston for hydraulic impact, and the other side is only used to drive the piston to reset, so that the impact energy can be more concentrated and the liquid can be emptied more quickly, further improving the performance of the hydraulic impactor;

[0025] The present invention does not need to set a valve core for fluid switching, nor set elastic components for buffer energy storage, etc., reducing the vulnerable parts. Moreover, the jet element and the piston are integrally integrated, eliminating the assembly gap between the split components, better avoiding the problem of energy leakage caused by the fitting gap, and further improving the reliability and service life;

[0026] Other beneficial effects of the present invention will be described in detail in the subsequent specific implementation part. Brief Description of the Drawings

[0027] Figure 1 is a half-sectional view of the overall structure of the present invention;

[0028] Figure 2 is Figure 1 the cross-sectional view at the position A-A in

[0029] Figure 3 is Figure 1 the cross-sectional view at the position B-B in

[0030] Figure 4 is Figure 1 the cross-sectional view at the position C-C in

[0031] Figure 5 is Figure 1 the cross-sectional view at the position D-D in

[0032]

Description of the Reference Numerals

[0033] 1 - Upper joint; 2 - Piston; 3 - Outer tube; 4 - First cavity; 5 - Jet element; 6 - Nozzle; 7 - Deflector; 8 - First feedback channel; 9 - Second feedback channel; 10 - Oscillation cavity; 11 - Drain cavity; 12 - Wedge tip; 13 - Second cavity; 14 - Anvil; Ⅰ - Upper joint fluid channel; Ⅱ - Upper part fluid channel of piston; Ⅲ - Upper layer drain channel; Ⅳ - Upper layer connection channel; Ⅴ - First output channel of oscillation cavity; Ⅵ - Second output channel of oscillation cavity; Ⅶ - Lower part fluid channel of piston; ⅦI - Lower layer drain channel; IX - Lower layer connection channel; X - Anvil fluid channel. Detailed implementation mode

[0034] To make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will be described in detail with reference to the drawings and specific embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the scope of protection of the present invention. In addition, the technical features involved in the different implementation manners of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0035] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0036] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a locking connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0037] Such as Figures 1-5As shown in the figure, an embodiment of the present invention provides a high-performance oscillating hydraulic impactor, which includes an upper joint 1, an outer tube 3, a piston 2, and an anvil 14. Among them, the upper joint 1 is arranged at the first end of the outer tube 3, the anvil 14 is arranged at the second end of the outer tube 3, and the piston 2 is arranged at the middle position of the outer tube 3, so it is located between the upper joint 1 and the anvil 14. When the hydraulic impactor operates, the upper joint 1 and the outer tube 3 are fixed, and the piston 2 can move inside the outer tube 3 to achieve the purpose of impacting the anvil 14. The anvil 14 can also move within a certain range at the second end of the outer tube 3 (limited by a limiting structure) to output an impact effect externally.

[0038] Therefore, in this embodiment, the entire hydraulic impactor only includes four main components. Compared with the prior art solutions that do not provide a pilot valve core and do not provide an energy storage spring, etc., the setting of components is significantly reduced, especially the setting of vulnerable components.

[0039] In this embodiment, the upper joint 1 is provided with an upper joint fluid passage I. The upper joint fluid passage I is preferably located at the central position of the upper joint 1 and penetrates the first end and the second end of the upper joint 1. Among them, the first end of the upper joint 1 extends to the outside of the first end of the outer tube 3, which serves as the liquid inlet of the entire hydraulic impactor. During operation, liquid continuously enters from the liquid inlet and maintains a preset pressure. The second end of the upper joint 1 is docked with the first end of the piston 2 to enable the liquid to enter the fluid passage provided inside the piston 2 to achieve the purpose of driving the piston 2. Similarly, the anvil 14 is provided with an anvil fluid passage X. The second end of the anvil fluid passage X serves as the liquid outlet of the entire hydraulic impactor. It is not only used for liquid output to assist the impact of the anvil, but also serves as the final discharge passage for liquid evacuation. The first end of the anvil fluid passage X is docked with the second end of the piston 2.

[0040] In this embodiment, the piston 2 is set in a form with a large middle size and small end sizes, so that the first end and the second end of the piston 2 can be inserted into the second end of the upper joint fluid passage I and the first end of the anvil fluid passage X respectively. Therefore, when the piston 2 moves inside the outer tube 3, the first end of the piston 2 can move relative to the upper joint fluid passage I, and the second end of the piston 2 can move relative to the anvil fluid passage X. Since the middle size of the piston 2 is larger than the end sizes, the middle part of the piston 2 cannot enter the upper joint fluid passage I and the anvil fluid passage X. When the piston 2 moves towards the anvil 14, the middle part of the piston 2 will contact the end face of the first end of the anvil 14 to achieve the effect of impacting the anvil 14; when the piston 2 moves upward to the upper joint 1 to reset, the middle part of the piston 2 can also be limited by the end face of the second end of the upper joint 1.

[0041] Among them, the space between the middle part of the piston 2 and the end face of the second end of the upper joint 1 in the outer tube 3 is the first cavity 4, and the space between the middle part of the piston 2 and the end face of the first end of the anvil 14 is the second cavity 13. When the liquid gradually flows into the second cavity 13 from inside the piston 2, the liquid pressure in the second cavity 13 gradually increases. Therefore, it will act on the corresponding end face in the middle of the piston 2, driving the piston 2 to move towards the upper joint 1, that is, the piston 2 impacts the anvil 14 and then moves back.

[0042] When the piston 2 returns to its original position and is driven to move towards the anvil 14, compared with the prior art where an energy storage spring is arranged in the first cavity 4, in this embodiment, the energy storage spring is cancelled, and at the same time, the first cavity 4 is set to communicate with the outside. Therefore, the pressure in the first cavity 4 will remain constant. Correspondingly, the first end of the piston 2 is located in the fluid passage Ⅰ of the upper joint. Therefore, the end face of the first end of the piston 2 is continuously subjected to the liquid pressure in the fluid passage Ⅰ of the upper joint. This acting force causes the piston 2 to gradually decelerate during the return process (the liquid in the second cavity 13 is gradually emptied). When it stops, this acting force is already greater than the liquid pressure in the second cavity 13. Therefore, it will drive the piston 2 to move forward again to impact the anvil 14.

[0043] It should be noted that during the process of the piston 2 impacting the anvil 14, after the liquid enters from the upper fluid passage Ⅱ of the piston, it will be discharged from the lower fluid passage Ⅶ of the piston to the anvil fluid passage X and then ejected outwards, achieving the purpose of assisting the anvil 14 to perform a hydraulic impact on the target object. And at a certain moment when the piston 2 impacts the anvil 14, the liquid will switch from the upper fluid passage Ⅱ of the piston to enter the second cavity 13, so as to increase the hydraulic pressure in the second cavity 13 and drive the piston 2 to return to its original position. Therefore, the acting force of the piston 2 impacting the anvil 14 is mainly provided by the liquid pressure in the fluid passage Ⅰ of the upper joint. The acting force when the piston 2 returns to its original position includes the resultant force of the liquid pressure in the second cavity 13 and the fluid passage Ⅰ of the upper joint. When it is necessary for the piston 2 to impact the anvil 14 with high performance, as long as the liquid pressure in the fluid passage Ⅰ of the upper joint is increased, it can ensure that the liquid pressure drives the piston 2 with a large pressure, making the effect obvious when the piston 2 impacts the anvil 14, so that the entire hydraulic impactor outputs a high-performance impact. And the return process does not require the piston 2 to impact the upper joint 1. Therefore, this method is equivalent to playing a buffering role for the piston 2.

[0044] Considering that the hydraulic pressure usually gradually decays during the flow of the liquid in the fluid channel, in this embodiment, the axial dimension of the upper joint 1 is set relatively small, while the axial dimension of the part of the piston 2 with a smaller outer diameter near the first end is set relatively large, so that the first end of the piston 2 can be kept within the fluid channel Ⅰ of the upper joint and as close as possible to the first end of the upper joint 1, ensuring that the liquid pressure received by the end face of the first end of the piston 2 is the largest. Therefore, when the axial dimension of the outer tube 3 is set relatively large, the piston 2 can ensure that the impact force for forward impact is the largest, further improving the performance of the hydraulic impactor.

[0045] As a preferred embodiment, in this embodiment, the first ends of the upper joint 1 and the outer tube 3 are connected by internal and external threads, which can adjust the depth of insertion of the upper joint 1 into the outer tube 3, thereby adjusting the limit position of the first end of the piston 2 relative to the upper joint 1 to adjust the maximum liquid pressure received by the end face of the first end of the piston 2. Therefore, the purpose of adjusting the impact force is achieved.

[0046] It should be noted that during the actual adjustment process, after the piston 2 is reset to the limit position, the middle part of the piston 2 will not contact the upper joint 1. At this time, the piston 2 has decelerated to a standstill, and the liquid pressure received by the end face of the first end reaches the maximum, and it is ready to accelerate and move towards the anvil 14 for the next impact. When the piston 2 impacts the anvil 14 to the limit position, the first end of the piston 2 will not completely withdraw from the fluid channel Ⅰ of the upper joint. Obviously, a certain degree of sealing is required between the first end of the piston 2 and the fluid channel Ⅰ of the upper joint, and between the second end of the piston and the fluid channel X of the anvil to avoid the inability to transfer the corresponding liquid pressure. Since in this embodiment, neither the first end nor the second end of the piston 2 will completely withdraw from the corresponding fluid channel, the corresponding sealing effect can be achieved on the premise of setting sealing components such as sealing rings. Obviously, the position where the middle part of the piston 2 contacts the inner wall of the outer tube 3 also needs to be sealed.

[0047] As mentioned above, the liquid flow inside the piston 2 needs to be switched to complete the processes of hydraulic impact and piston 2 reset respectively. Based on this, in this embodiment, a jet element 5 is also provided inside the piston 2, and the jet element 5 is used to periodically switch the liquid flow inside the piston 2, so as to periodically pressurize and depressurize the second cavity 13, achieving the purpose of the piston 2 reciprocally impacting the anvil 14.

[0048] Among them, the jet element 5 includes a nozzle 6, a guide block 7, an oscillation cavity 10, a wedge tip 12, and also includes a drain cavity 11. Among them, the nozzle 6 is arranged at the inlet of the jet element 5. The first end of the nozzle 6 is communicated with the upper fluid passage II of the piston, and at the same time, the second end of the nozzle 6 is communicated with the oscillation cavity 10. In one specific embodiment, the nozzle 6 is arranged in a reduced form, that is, the size of the first end of the nozzle 6 gradually decreases towards the second end, so that the liquid accelerates into the oscillation cavity 10. The oscillation cavity 10 is located in the jet element 5. The wedge tip 12 is arranged at the second end of the oscillation cavity 10. The guide block 7 is arranged on both sides of the oscillation cavity 10 near the first end to separate the first attached wall side and the second attached wall side in the oscillation cavity 10, and make the oscillation cavity 10 form an expanding form. At the same time, a first feedback channel 8 is formed between the position near the end of the first attached wall side and the first end of the oscillation cavity 10, and a second feedback channel 9 is formed between the position near the end of the second attached wall side and the first end of the oscillation cavity 10. At the adjacent position of the second attached wall side, the drain cavity 11 is directly formed on the corresponding guide block 7 and is communicated with the second attached wall side. As a preferred embodiment, a smooth arc groove is arranged at the tip of the wedge tip 12 in this embodiment to guide the jet to a specific side, making the jet more concentrated and directional. In addition, an oscillation cavity first output channel V and an oscillation cavity second output channel VI are also arranged in the piston 2. The oscillation cavity first output channel V is communicated with the lower fluid passage VII of the piston, and the oscillation cavity second output channel VI is communicated to the outside of the piston 2 and is communicated with the second cavity 13.

[0049] Therefore, when the liquid enters the oscillation cavity 10, due to the expanding form of the oscillation cavity 10, (based on the Coanda principle) the liquid will concentrate on the first attached wall side of the oscillation cavity 10, and then sequentially enter the oscillation cavity first output channel V and the lower fluid passage VII of the piston, and the anvil fluid passage X forms a hydraulic impact. At the same time, a small part of the liquid will enter the first feedback channel 8 and finally spray out from the first end of the oscillation cavity 10, causing the oscillation cavity 10 to reverse, that is, the liquid entering the oscillation cavity 10 from the nozzle is converted to concentrate on the second attached wall side, and then sequentially enter the oscillation cavity second output channel VI and the second cavity 13, so that the liquid in the second cavity 13 gradually accumulates and the hydraulic pressure gradually increases to push the piston 2 to reset. Similarly, a small part of the liquid will enter the second feedback channel 9 and finally spray out from the first end of the oscillation cavity 10, causing the oscillation cavity 10 to reverse again, that is, the liquid entering the oscillation cavity 10 from the nozzle 6 is converted to concentrate on the first attached wall side to perform the next impact process. During the impact process, the liquid in the second cavity 13 will gradually decrease, and it can be directly discharged along the oscillation cavity second output channel VI, the second attached wall side and the drain cavity 11 without entering the first end of the oscillation cavity 10 and affecting the liquid flow on the first attached wall side, resulting in affecting the hydraulic impact process. Therefore, the effect of rapid evacuation and pressure relief is achieved, and the performance of the hydraulic impactor is further improved.

[0050] In this embodiment, a lower-layer emptying channel VII is further provided inside the piston 2. One end of the lower-layer emptying channel VII is communicated with the emptying cavity 11, and the other end of the lower-layer emptying channel VII is communicated with the lower-fluid channel VII of the piston through a lower connecting channel IX, so as to be directly discharged through the lower-fluid channel VII of the piston (which can also be regarded as a part of hydraulic impact). In addition, an upper-layer emptying channel III is provided inside the piston 2. One end of the upper-layer emptying channel III is communicated with the first cavity 4, and the other end of the upper-layer emptying channel III is communicated with the emptying cavity 11 through an upper connecting channel IV. Therefore, the liquid accidentally entering the first cavity 4 can also be discharged through the emptying cavity 11, avoiding the accumulation of liquid in the first cavity 4.

[0051] As described above, compared with the traditional method of separately arranging the impact hammer and the piston, when the impact hammer is driven by the piston to move, the high-frequency piston movement is likely to cause fatigue damage to the impact hammer connecting rod, reducing the service life of the device. In the high-performance oscillating hydraulic impactor provided in this embodiment, the piston 2 adopts an integral structure, and the corresponding position of the piston 2 can be directly used as the impact surface, making rigid contact with the end face of the first end of the anvil 14, thereby reducing the vulnerable parts. At the same time, there is no need to set structures such as sleeves inside the outer tube 3, so that the middle dimension of the piston 2 can be set to the maximum, increasing the impact area and improving the impact efficiency.

[0052] At the same time, compared with the traditional way of symmetrically arranging the left and right sides of the hydraulic impactor, in this solution, through the asymmetric channel setting, only one side of the output channel is communicated with the lower-fluid channel VII of the piston for hydraulic impact, and the other side is only used to drive the piston 2 to reset, making the impact energy more concentrated and the liquid emptying faster, further improving the performance of the hydraulic impactor.

[0053] In addition, as mentioned above, the high-performance oscillating hydraulic impactor provided in this embodiment does not need to set a valve core for fluid switching, and does not need to set elastic parts for buffer energy storage, etc., reducing the vulnerable parts. Moreover, the jet element 5 and the piston 2 are integrally integrated, eliminating the assembly gap between the split components, better avoiding the problem of energy leakage caused by the fitting gap, and further improving the reliability and service life.

[0054] The technical features of the above embodiments can be combined arbitrarily. For the sake of brief description, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combinations of these technical features do not conflict, they should be considered as the scope described in this specification.

[0055] The above embodiments only represent several implementation manners of the present application, and their descriptions are relatively specific and detailed, but they should not be understood as limiting the scope of the application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several deformations and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A high-performance oscillating hydrodynamic impactor, characterized in that, It includes an upper joint, an outer tube, a piston and an anvil; the upper joint is arranged at the first end of the outer tube, the anvil is arranged at the second end of the outer tube, the piston is arranged inside the outer tube and is located between the upper joint and the anvil; The upper joint is provided with an upper joint fluid channel. The first end of the upper joint fluid channel is a liquid inlet, and the liquid inlet maintains a preset liquid inlet pressure. The second end of the upper joint fluid channel is docked with the first end of the piston so that liquid enters the fluid channel arranged inside the piston. The anvil is provided with an anvil fluid channel. The second end of the anvil fluid channel is a liquid outlet, and the first end of the anvil fluid channel is docked with the second end of the piston; The outer diameter sizes of the first end and the second end of the piston are set to be smaller than the size of the middle part. When the piston moves inside the outer tube, the first end of the piston can move relative to the upper joint fluid channel, the second end of the piston can move relative to the anvil fluid channel, and the middle part of the piston can contact the end face of the first end of the anvil to exert an impact on the anvil; The space between the middle part of the piston and the end face of the second end of the upper joint is a first cavity, and the space between the middle part of the piston and the end face of the first end of the anvil is a second cavity. The first cavity is communicated with the outside and the pressure remains constant. The end face of the first end of the piston is kept under the liquid pressure in the upper joint fluid channel; A jet element is arranged inside the piston, and the jet element is used to switch the liquid to enter the anvil fluid channel or the second cavity.

2. The high-performance oscillating hydraulic impactor according to claim 1, characterized in that, The first end of the piston is kept inserted into the upper joint fluid channel, and the second end of the piston is kept inserted into the anvil fluid channel.

3. The high-performance oscillating hydraulic impactor according to claim 1, characterized in that, The first end of the piston is provided with an upper piston fluid channel, and the second end of the piston is provided with a lower piston fluid channel. The upper piston fluid channel is communicated with the upper joint fluid channel, and the lower piston fluid channel is communicated with the anvil fluid channel.

4. The high-performance oscillating hydraulic impactor according to claim 1, wherein The upper joint and the first end of the outer tube are connected by internal and external threads, and the insertion depth of the upper joint into the outer tube can be adjusted to adjust the maximum liquid pressure received by the end face of the first end of the piston.

5. A high-performance oscillating hydraulic impactor according to claim 1, characterized in that, Sealing structures are arranged between the first end of the piston and the upper joint fluid channel, between the second end of the piston and the anvil fluid channel, and between the middle part of the piston and the inner wall of the outer tube.

6. The high-performance oscillating hydraulic impactor according to claim 3, wherein The jet element includes a nozzle, an oscillation cavity and a discharge cavity. The first end of the nozzle is communicated with the upper piston fluid channel, the second end of the nozzle is communicated with the oscillation cavity. The oscillation cavity is set in a gradually expanding form and has a first attached wall side and a second attached wall side. There is a first feedback channel between the position of the first attached wall side close to the second end of the oscillation cavity and the first end of the oscillation cavity, and there is a second feedback channel between the position of the second attached wall side close to the second end of the oscillation cavity and the first end of the oscillation cavity. The discharge cavity is communicated with the second attached wall side; An oscillation cavity first output channel and an oscillation cavity second output are further arranged inside the piston. The oscillation cavity first output channel is communicated with the fluid channel at the lower part of the piston, and the oscillation cavity second output channel is communicated to the outside of the piston and is communicated with the second cavity.

7. The high-performance oscillating hydraulic impactor according to claim 6, characterized in that, The nozzle is arranged in a reduced form, and the size of the first end of the nozzle gradually decreases towards the second end, so that the liquid accelerates and flows into the oscillation cavity.

8. A high-performance oscillating hydraulic impactor according to claim 6, characterized in that, A flow guiding block and a wedge tip are arranged inside the oscillation cavity. The wedge tip is arranged at the second end of the oscillation cavity, the flow guiding blocks are arranged on both sides of the oscillation cavity close to the first end, the exhaust cavity is directly formed on the corresponding flow guiding block, and a smooth arc groove is arranged at the tip of the wedge tip.

9. The high-performance oscillating hydraulic impactor according to claim 3, wherein A lower layer exhaust channel is further arranged inside the piston. One end of the lower layer exhaust channel is communicated with the exhaust cavity, and the other end of the lower layer exhaust channel is communicated with the fluid channel at the lower part of the piston through a lower layer connecting channel.

10. A high-performance oscillating hydraulic impactor according to claim 1, characterized in that, An upper layer exhaust channel is further arranged inside the piston. One end of the upper layer exhaust channel is communicated with the first cavity, and the other end of the upper layer exhaust channel is communicated with the exhaust cavity through an upper layer connecting channel.

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