Hydraulic impactor

Abstract

The utility model relates to the technical field of rock drilling equipment, in particular to a hydraulic impactor which comprises a bit shank, a front guide module, a gearbox module and an impact flow distribution module, the front guide module comprises a front guide shell, and a first cavity penetrating through the front guide shell is formed in the front guide shell; the gear box module comprises a gear box shell and a rotating part, and a second cavity penetrating through the gear box shell is formed in the gear box shell; the impact flow distribution module comprises an impact flow distribution shell and an impact part, and a third cavity is formed in the impact flow distribution shell; wherein the two ends of the gear box shell are detachably connected with the front guide shell and the impact flow distribution shell correspondingly, the first cavity, the second cavity and the third cavity are coaxially arranged, and the inner diameter of the first cavity and the inner diameter of the third cavity are gradually reduced in the direction away from the gear box module, so that when the hydraulic impactor needs to be maintained, the hydraulic impactor is prevented from being damaged, and the service life of the hydraulic impactor is prolonged. And maintenance of internal parts of each module can be realized only by disassembling one part.

Description

Technical Field

[0001] This application relates to the field of rock drilling equipment technology, and in particular to a hydraulic impactor. Background Technology

[0002] Hydraulic impactors primarily use high-pressure oil as power to drive a piston to strike the drill bit. Due to their high efficiency and ease of control, they are widely used in tunnel construction for railway transportation, water conservancy projects, subway projects, oil and gas pipelines, and other applications.

[0003] Hydraulic impactors typically operate under harsh conditions, often in complex environments such as uneven geological formations and corrosive flushing water. This makes the internal components prone to wear and corrosion, rendering the hydraulic impactor unusable. Furthermore, the complex structure of hydraulic impactors makes maintenance and repair of easily damaged internal parts, such as the drill bit and impact components, extremely inconvenient and time-consuming.

[0004] In response, patent CN205117211U discloses a hydraulic rock drill, which includes a drill bit; a hydraulic rotary transmission module with an output shaft, configured to receive hydraulic fluid and convert the liquid pressure energy of the hydraulic fluid into the mechanical energy of the output shaft to drive the drill bit to rotate; a hydraulic impact module with an impact rod, installed on the hydraulic rotary transmission module, configured to receive hydraulic fluid and control the flow direction of the hydraulic fluid so that the impact rod reciprocates along the length of the drill bit, thereby impacting the drill bit; and a drill bit connection module, installed on the hydraulic rotary transmission module, with the drill bit passing through the drill bit connection module and installed on the output shaft. Because the hydraulic rock drill has a hydraulic rotary transmission module, a hydraulic impact module, and a drill bit connection module, and each module adopts a modular design, it is particularly easy to maintain and replace, minimizing maintenance costs and reducing labor intensity.

[0005] Although the hydraulic rock drill disclosed in this patent can be disassembled into several independent modules, including the hydraulic rotary speed change module, the hydraulic impact module, and the drill bit connection module, and each module can be disassembled and maintained separately, each module still has many parts, making disassembly difficult. This makes it difficult to effectively solve the problems of inconvenience, time-consuming and labor-intensive maintenance and disassembly of existing hydraulic impactors. Utility Model Content

[0006] This application provides a hydraulic impactor to solve the problems of inconvenience, time-consuming and labor-intensive maintenance and disassembly of existing hydraulic impactors.

[0007] To solve the above problems, this application adopts the following technical solution:

[0008] This application provides a hydraulic impactor, including a drill bit, and a front guide module, a gearbox module and an impact distribution module connected in sequence;

[0009] The front guide module includes a front guide housing, on which a first cavity is provided that penetrates the front guide housing, and the drill bit passes through the first cavity, with both ends extending out of the first cavity.

[0010] The gearbox module includes a gearbox housing and a rotating component. The gearbox housing has a second cavity that penetrates the gearbox housing. One end of the drill bit extends into the second cavity and is connected to the rotating component. The rotating component is configured to drive the drill bit to rotate.

[0011] The impact distribution module includes an impact distribution housing and an impact component. The impact distribution housing is provided with a third cavity. The impact component includes a piston rod located in the third cavity. The impact component is configured to drive the piston rod to move axially along the third cavity to impact the drill bit.

[0012] The gearbox housing is detachably connected to the front guide housing and the impact distribution housing at both ends. The first cavity, the second cavity and the third cavity are coaxially arranged and interconnected. The inner diameter of the first cavity and the third cavity gradually decreases along the direction away from the gearbox module.

[0013] In some possible designs, the end of the front guide housing connected to the gearbox housing is provided with a first connecting portion, the first connecting portion extending at least partially radially to the outside of the front guide housing, and the end of the impact distribution housing connected to the gearbox housing is provided with a second connecting portion, the second connecting portion extending at least partially radially to the outside of the impact distribution housing, and both ends of the gearbox housing are respectively connected to the first connecting portion and the second connecting portion by bolts.

[0014] In some possible designs, the front guide module also includes a dust cover that is sealed to the front guide housing at the end away from the gearbox module, and the edge of the dust cover extends radially to the outside of the front guide housing, with the drill bit penetrating the dust cover and extending to the side of the dust cover away from the front guide housing.

[0015] In some possible designs, the outer diameter of the dust cover gradually increases along the direction close to the front guide housing.

[0016] In some possible designs, one end of the front guide housing is provided with a connecting section that connects to the first connecting portion, and the outer diameter of the connecting section gradually increases along the direction close to the first connecting portion.

[0017] In some possible designs, at least four connecting platforms for fixing the bolts are evenly arranged in a ring on the first connecting portion, and the thickness of the portion of the first connecting portion located between adjacent connecting platforms gradually decreases in the direction away from the connecting segment.

[0018] In some possible designs, the impact component also includes an inlet oil passage and a return oil passage for hydraulic oil to pass through, and the impact distribution housing is also provided with an inlet connection port communicating with the inlet oil passage and a return oil connection port communicating with the return oil passage.

[0019] In some possible designs, the impact component also includes a high-voltage accumulator and a low-voltage accumulator, which are respectively located on opposite sides of the impact distribution housing, and both the high-voltage accumulator and the low-voltage accumulator are detachably connected to the impact distribution housing.

[0020] In some possible designs, the gearbox housing and the impact distribution housing are symmetrically provided with mounting holes for mounting the hydraulic impactor on opposite sides.

[0021] In some possible designs, the front guide module further includes two support rods, which are arranged one in front of the other in the first cavity and are coaxial with the first cavity. The support rods have a through hole in the middle for the rod tip to pass through, and the outer surface of the rod tip contacts and slides with the inner wall of the through hole.

[0022] The beneficial effects of this application are:

[0023] The hydraulic impactor provided in this application achieves multi-module splicing and installation by setting a front guide module, a gearbox module, and an impact distribution module that are detachably connected in sequence. The front guide module includes a front guide module and a drill bit. A first cavity is provided inside the front guide module. The gearbox module includes a gearbox housing and a rotating component. A second cavity is provided inside the gearbox housing. The impact distribution module includes an impact distribution housing and an impact component. A third cavity is provided inside the impact distribution housing. The rotating component drives the drill bit to rotate, and the impact component drives the drill bit to move axially along the first cavity, enabling the hydraulic impactor to operate normally. The first cavity... The first, second, and third cavities are coaxially arranged, and the inner diameters of the first and third cavities gradually decrease in the direction away from the gearbox module. This causes the dimensions of the parts installed in the first and third cavities to also gradually decrease in the direction away from the gearbox module. As a result, when maintaining the hydraulic impactor, it is only necessary to separate the gearbox module, the front guide module, and the impact distribution module. The internal parts can then be removed sequentially from the first and third cavities towards the gearbox module for maintenance. This significantly reduces the difficulty and time required for disassembling the hydraulic impactor, effectively improving the convenience of maintenance. Attached Figure Description

[0024] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. Obviously, the drawings described below are some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without creative effort.

[0025] Figure 1 A schematic diagram of the hydraulic impactor provided in this application;

[0026] Figure 2 for Figure 1 A three-dimensional diagram of a hydraulic impactor;

[0027] Figure 3 for Figure 2 A front view of the hydraulic impactor in the image;

[0028] Figure 4 for Figure 2 Rear view of the hydraulic impactor in the image;

[0029] Figure 5 for Figure 2 A schematic diagram of the structure of the front guide module in the middle;

[0030] Figure 6 for Figure 2 A structural diagram of the gearbox module in the diagram;

[0031] Figure 7 for Figure 2 A schematic diagram of the impact distribution module in the middle;

[0032] Figure 8 for Figure 7 A structural schematic diagram of the impact distribution module from another angle.

[0033] Explanation of reference numerals in the attached figures:

[0034] 100 - drill tail;

[0035] 200 - Front guide module; 210 - Dust cover; 220 - Water pipe connection port; 230 - First connection part; 240 - Connection section; 250 - Support piece; 260 - Front guide housing;

[0036] 300 - Gearbox module; 310 - Second cavity; 320 - Gearbox housing; 330 - Mounting hole;

[0037] 400 - Impact distribution module; 410 - Third cavity; 420 - Impact distribution housing; 430 - Second connection part; 440 - Oil inlet connection port; 450 - Oil return connection port; 460 - High-voltage accumulator; 470 - Low-voltage accumulator;

[0038] 500-bolt.

[0039] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0040] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0041] Secondly, it should be noted that in the description of this application, the terms "inner" and "outer," etc., which indicate the direction or positional relationship, are based on the direction or positional relationship shown in the accompanying drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application.

[0042] Furthermore, it should be noted that, in the description of this application, unless otherwise expressly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0043] Hydraulic impactors often operate in complex environments with eccentric loads and acidic corrosive liquids, making some internal parts prone to damage and leading to failure. Therefore, regular maintenance of the vulnerable parts of hydraulic impactors is necessary. However, current maintenance practices for hydraulic impactors present the following problems:

[0044] 1. The hydraulic impactor has a relatively complex structure and poor overall maintainability;

[0045] 2. Existing hydraulic impactors require disassembly of the oil pipes before maintenance, and disassembly of components such as the drill bit and impact parts is inconvenient and time-consuming.

[0046] To avoid the aforementioned problems, this application provides a hydraulic impactor that is divided into three detachable independent modules. After the three modules are separated, the components in the corresponding modules can be taken out one by one from the end for maintenance. Disassembly is extremely convenient, greatly improving the convenience of maintenance of the hydraulic impactor.

[0047] The present application will now be described in detail with reference to the accompanying drawings and specific embodiments:

[0048] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, this application embodiment provides a hydraulic impactor, which includes a drill bit 100, and a front guide module 200, a gearbox module 300, and an impact distribution module 400 that are detachably connected in sequence. For ease of understanding, the end of the hydraulic impactor used for rock drilling is described below as the front end of each component.

[0049] The front guide module 200 includes a front guide housing 260. A first cavity is provided on the front guide housing 260, extending through it. The extension direction of the first cavity is consistent with the extension direction of the front guide housing 260. A drill bit 100 passes through the first cavity, with both ends extending out of the first cavity. Specifically, one end of the drill bit 100 extends to the front of the front guide housing 260 for connecting to the drill bit, and the other end extends to the rear of the front guide housing 260. The gearbox module 300 includes a gearbox housing 320 and a rotating component. A second cavity 310 is provided on the gearbox housing 320, extending through it. The extension direction of the second cavity 310 is consistent with the extension direction of the gearbox housing 320. One end of the drill bit 100 extending to the rear of the front guide housing 260 extends into the second cavity 310 and connects to the rotating component. The rotating component is configured to drive the drill bit 100 to rotate. The impact distribution module 400 includes an impact distribution housing 420 and an impact component. The impact distribution housing 420 is provided with a third cavity 410. The extension direction of the third cavity 410 is consistent with the extension direction of the impact distribution housing 420. The impact component includes a piston rod located in the third cavity 410. The piston rod can move along the axial direction of the third cavity 410 to impact the drill bit 100, causing the drill bit 100 to move along the axial direction of the first cavity.

[0050] The gearbox housing 320 is detachably connected to the front guide housing 260 and the impact distribution housing 420 at both ends. The first cavity, the second cavity 310 and the third cavity 410 are all coaxially arranged and interconnected. In addition, the inner diameter of the first cavity and the third cavity 410 gradually decreases in the direction away from the gearbox module 300. That is, the size of the components installed inside the first cavity and the third cavity 410 also gradually decreases in the direction away from the gearbox module 300. Therefore, the components inside the first cavity and the third cavity 410 can be removed sequentially in the direction towards the gearbox module 300, which greatly reduces the difficulty of disassembling the internal components.

[0051] In addition, the rotating and impact components can directly utilize the conventional structures of existing hydraulic impactors.

[0052] For example, the rotating component may include a hydraulic motor, a drive shaft, a pinion, and a large gear. The output end of the hydraulic motor is connected to the drive shaft to drive the drive shaft to rotate. The pinion is mounted on the drive shaft and meshes with the large gear. The large gear is mounted in the second cavity 310 and can be splined with the drill bit 100. When the drive shaft drives the pinion to rotate, the large gear will drive the drill bit 100 to rotate synchronously.

[0053] For example, the impact component may include components such as a distribution valve, a front cylinder, and a rear cylinder. The third cavity 410 is only connected to the second cavity 310 with one open end. The front cylinder, the rear cylinder, and the distribution valve are all installed in the third cavity 410 in a front-to-back relationship along the axial direction. The piston rod passes through the rear cylinder and the front cylinder, and its front end is used to connect with the end of the drill bit 100. The distribution valve can control the direction of movement of the piston rod after the device that supplies oil to the hydraulic impactor supplies oil, thereby repeatedly impacting the drill bit 100 and causing the drill bit 100 to move.

[0054] The front guide housing 260 can also be provided with a flushing water channel, and a water pipe connection port 220 is provided on the side of the front guide housing 260. The water pipe connection port 220 is used to connect with the water pipe joint of the water supply equipment to provide flushing water to the hydraulic impactor through the water supply equipment. Of course, the water pipe joint can be connected to the water pipe connection port 220 by means of threaded connection.

[0055] When the hydraulic impactor malfunctions or needs maintenance, if the component to be maintained belongs to the front guide module 200, simply separate the front guide module 200 from the gearbox module 300. Then, take out the internal components from the end of the first cavity near the second cavity 310 in sequence. If the component to be maintained belongs to the impact distribution module 400, separate the impact distribution module 400 from the gearbox module 300 accordingly. Of course, if the component to be maintained belongs to the gearbox module 300, you can choose to separate the modules connected at one or both ends, and then take out the components in the second cavity 310.

[0056] This configuration allows for easy maintenance of components within a module of the hydraulic impactor by simply separating it from the other module connected to the end, significantly improving the disassembly efficiency of the hydraulic impactor and facilitating the maintenance of its internal parts.

[0057] In some possible implementations, the front guide housing 260 is provided with a first connecting portion 230 at one end for connecting to the gearbox housing 320. The first connecting portion 230 extends at least partially radially along the front guide housing 260 to the outside of the gearbox housing 320. The impact distribution housing 420 is provided with a second connecting portion 430 at one end for connecting to the gearbox housing 320. The second connecting portion 430 extends at least partially radially along the impact distribution housing 420 to the outside of the impact distribution housing 420. Both ends of the gearbox housing 320 are connected to the first connecting portion 230 and the second connecting portion 430 respectively by bolts 500.

[0058] That is, corresponding holes are provided at both ends of the first connecting part 230, the second connecting part 430 and the gearbox housing 320. When connecting the front guide module 200, the gearbox module 300 and the impact distribution module 400, it is only necessary to align the holes on the first connecting part 230 and the second connecting part 430 with the holes on the gearbox housing 320, and then tighten them with bolts 500.

[0059] It is understandable that the first connecting part 230 and the second connecting part 430 can both be configured as a flange-like structure or any other structure, as long as they can be stably connected to the gearbox housing 320 by bolts 500.

[0060] In order to improve the sealing effect between the front guide module 200, the gearbox module 300, and the impact distribution module 400, sealing structures, such as sealing gaskets, can be added between the first connecting part 230 and the gearbox housing 320, and between the second connecting part 430 and the gearbox housing 320.

[0061] In some possible implementations, the front guide module 200 further includes a dust cover 210 located at the end of the front guide housing 260 away from the gearbox module 300, i.e., the dust cover 210 is mounted on the front end of the front guide housing 260 and is sealed to the front guide housing 260. The edge of the dust cover 210 extends radially along the front guide housing 260 to the outside of the front guide housing 260 (the extension direction of the front guide housing 260 is its axial direction, while the radial direction is its width direction, and the radial direction is perpendicular to the axial direction). The drill bit 100 passes through the dust cover 210 and extends to the side of the dust cover 210 away from the front guide housing 260 to connect with the drill bit.

[0062] The edge of the dust cover 210 extends to the outside of the front guide housing 260. During the use of the hydraulic impactor, the dust cover 210 can block the flushing sewage and prevent the flushing sewage from entering the first cavity, thereby effectively protecting the internal components of the hydraulic impactor.

[0063] Furthermore, the outer diameter of the dust cover 210 gradually increases along the direction close to the front guide housing 260, making the cross-section of the dust cover 210 annular with a gradually increasing diameter, thus forming a trumpet-like structure. During the operation of the hydraulic impactor, the dust cover 210 can better guide the flushing wastewater at the front end, facilitating its discharge and further preventing flushing wastewater from entering the interior of the hydraulic impactor.

[0064] Furthermore, one end of the front guide housing 260 is provided with a connecting section 240 for connecting with the first connecting part 230, and the diameter of the connecting section 240 gradually increases along the direction close to the first connecting part 230, while the other parts of the front guide housing 260 can be cylindrical, so that some of the flushing sewage that reaches the rear end of the dust cover 210 can leave the hydraulic impactor better under the guidance of the connecting section 240.

[0065] For example, the cross-section of the connecting segment 240 can be annular, and the diameter gradually increases in the direction of approaching the first connecting portion 230.

[0066] Furthermore, at least four connecting platforms for fixing bolts 500 are evenly arranged in a ring on the first connecting part 230. The thickness of the portion of the first connecting part 230 located between adjacent connecting platforms gradually decreases in the direction away from the connecting section 240 to connect the end of the connecting section 240, forming a guide section with a certain angle to guide the flow of flushing sewage, etc., so that the flushing sewage, etc. can leave the hydraulic impactor better.

[0067] In some possible implementations, the impact component also includes an inlet oil passage and a return oil passage for hydraulic oil to pass through, mainly used to cooperate with the distribution valve to control the movement of the piston rod. The specific principle and setting method are well known to those skilled in the art, and will not be described in detail here.

[0068] The ports of both the inlet and return oil circuits are located on the impact distribution housing 420. The impact distribution housing 420 is also equipped with an inlet connection port 440 and a return oil connection port 450. The inlet connection port 440 is connected to the port of the inlet oil circuit, and the return oil connection port 450 is connected to the port of the return oil circuit. At the same time, the inlet connection port 440 and the return oil connection port 450 are used to connect to the oil pipe, so as to connect to the oil supply device that supplies hydraulic oil to the hydraulic impactor through the oil pipe.

[0069] It is understandable that the oil inlet port 440 and the oil return port 450 can be connected to the oil pipe via flanges or other common methods, as long as the oil inlet and oil return lines can be connected to the oil pipe. This example does not impose any restrictions on this.

[0070] This configuration connects all the oil pipes to the impact distribution housing 420, eliminating the need for oil pipes on the gearbox module 300. This allows the impactor to be disassembled and maintained directly on the boom without removing the oil pipes, further improving the convenience of hydraulic impactor maintenance.

[0071] In some possible embodiments, the impact component further includes a high-pressure accumulator 460 and a low-pressure accumulator 470. The high-pressure accumulator 460 can be connected to the inlet oil circuit, and the low-pressure accumulator 470 can be connected to the return oil circuit. The high-pressure accumulator 460 and the low-pressure accumulator 470 are respectively disposed on opposite sides of the impact distribution housing 420, for example... Figure 7 and Figure 8 Both sides of the device are provided with multiple holes for installation. The high-voltage accumulator 460 and the low-voltage accumulator 470 are detachably connected to the impact distribution housing 420.

[0072] The high-voltage accumulator 460 and the low-voltage accumulator 470 can be installed on the side of the impact distribution housing 420 by connecting screws or by pipe joints. It is understood that the high-voltage accumulator 460 and the low-voltage accumulator 470 can also be installed in other ways, as long as the high-voltage accumulator 460 and the low-voltage accumulator 470 can work normally.

[0073] In addition, the high-pressure accumulator 460 and the low-pressure accumulator 470 can be used to store energy and eliminate pulses, thereby stabilizing the pressure and improving the performance of the hydraulic impactor during use. The structure and working principle of the accumulators are well known to those skilled in the art, and will not be described in detail here.

[0074] In this embodiment, the high-pressure accumulator 460 and the low-pressure accumulator 470 adopt a distributed structure, with them distributed on different sides of the impact distribution housing 420. Compared to having them on the same side of the impact distribution housing 420, this makes the hydraulic impactor structure more compact, reducing the overall size and making it more suitable for construction conditions such as anchor bolting and tunneling. Furthermore, the high-pressure accumulator 460 and the low-pressure accumulator 470 are detachably connected to the impact distribution housing 420, allowing for diaphragm replacement and nitrogen charging of the accumulators 460 and 470 without disassembling the entire unit, further improving the ease of use of the hydraulic impactor.

[0075] In some possible implementations, mounting holes 330 for installing hydraulic impactors are symmetrically provided on both sides of the gearbox housing 320 and the impact distribution housing 420. That is, the mounting screw holes on the gearbox housing 320 and the impact distribution housing 420 are symmetrically provided on both sides, so that when the hydraulic impactor is installed on the trolley, the whole machine can be rotated 180° for installation. This realizes the interchangeability of the hydraulic impactor installation on the left and right booms of the trolley, effectively enhancing the adaptability of the hydraulic impactor installation and reducing the production cost of the hydraulic impactor.

[0076] In some possible implementations, the front guide module 200 further includes two support members 250, which are arranged in a front-to-back relationship within the first cavity. Each support member 250 has a through hole in its middle for the shank 100 to pass through, and the outer surface of the shank 100 contacts and slides against the inner wall of the through hole. This allows the two support members 250 to guide the shank 100, preventing radial disturbance of the shank 100 caused by biased loads and thus avoiding uneven wear.

[0077] Specifically, the front guide module 200 may also include a water injection sleeve and a retaining sleeve, both of which are located within the first cavity. The retaining sleeve is close to the gearbox housing 320, and the water injection sleeve is close to the dust cover 210. Both the water injection sleeve and the retaining sleeve have holes. The drill bit 100 passes through the holes in the retaining sleeve and the water injection sleeve. The drill bit support 250 may be cylindrical, with one drill bit support 250 located in the hole of the retaining sleeve and the other drill bit support 250 located in the hole of the water injection sleeve. Sealing rings or similar devices may be installed in the holes of the retaining sleeve and the water injection sleeve to achieve sealing between the components.

[0078] This configuration effectively restricts the movement direction of the drill bit 100 through the two support members 250, preventing radial disturbance of the drill bit 100 caused by eccentric load and thus preventing eccentric wear. This provides better protection for the drill bit 100, enabling the hydraulic impactor to adapt to eccentric load conditions, improving the hydraulic impactor's adaptability to different working conditions, and reducing the probability of damage to the drill bit 100 inside the hydraulic impactor.

[0079] Other embodiments of this application will readily come to mind when considering the specification and practicing the technical solutions disclosed herein.

[0080] This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary technical means in the art that are not disclosed in this application.

[0081] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A hydraulic impactor, characterized by, The drill bit shank (100) is connected with a front guide module (200), a gearbox module (300) and an impact flow distribution module (400) in sequence. The front guide module (200) comprises a front guide shell (260) provided with a first cavity penetrating through the front guide shell (260), and the drill bit shank (100) penetrates through the first cavity and extends out of the first cavity at both ends. The gearbox module (300) comprises a gearbox shell (320) provided with a second cavity (310) penetrating through the gearbox shell (320), and one end of the drill bit shank (100) extends into the second cavity (310) and is connected with a rotating component configured to drive the drill bit shank (100) to rotate. The impact flow distribution module (400) comprises an impact flow distribution shell (420) provided with a third cavity (410), and an impact component comprising a piston rod located in the third cavity (410) and moving along the axial direction of the third cavity (410) to impact the drill bit shank (100). The two ends of the gearbox shell (320) are detachably connected with the front guide shell (260) and the impact flow distribution shell (420), the first cavity, the second cavity (310) and the third cavity (410) are coaxially arranged and in communication with each other, and the inner diameters of the first cavity and the third cavity (410) gradually decrease along the direction away from the gearbox module (300).

2. The hydraulic impactor of claim 1, wherein, The end of the front guide shell (260) connected with the gearbox shell (320) is provided with a first connecting part (230) extending at least partially along the radial direction of the front guide shell (260) to the outside of the front guide shell (260), the end of the impact flow distribution shell (420) connected with the gearbox shell (320) is provided with a second connecting part (430) extending at least partially along the radial direction of the impact flow distribution shell (420) to the outside of the impact flow distribution shell (420), and the two ends of the gearbox shell (320) are connected with the first connecting part (230) and the second connecting part (430) through bolts (500).

3. The hydraulic impactor of claim 2, wherein, The front guide module (200) further comprises a dust cover (210) sealingly connected with the end of the front guide shell (260) away from the gearbox module (300), and the edge of the dust cover (210) extends along the radial direction of the front guide shell (260) to the outside of the front guide shell (260), and the drill bit shank (100) penetrates through the dust cover (210) and extends to the side of the dust cover (210) away from the front guide shell (260).

4. The hydraulic impactor of claim 3, wherein, The outer diameter of the dust cover (210) gradually increases along the direction close to the front guide shell (260).

5. The hydraulic impactor of claim 4, wherein, One end of the front guide shell (260) is provided with a connecting section (240) connected with the first connecting part (230), and an outer diameter of the connecting section (240) gradually increases along a direction close to the first connecting part (230).

6. The hydraulic impactor of claim 5, wherein, Four connecting platforms for fixing the bolts (500) are uniformly arranged on the first connecting part (230), and a thickness of a part of the first connecting part (230) between adjacent connecting platforms gradually decreases along a direction away from the connecting section (240).

7. The hydraulic impactor of any one of claims 1 to 6, wherein, The impact component further comprises an oil inlet oil passage and an oil return oil passage through which hydraulic oil passes, and the impact flow distribution shell (420) is further provided with an oil inlet connecting port (440) in communication with the oil inlet oil passage and an oil return connecting port (450) in communication with the oil return oil passage.

8. The hydraulic impactor of claim 7, wherein, The impact component further comprises a high-pressure accumulator (460) and a low-pressure accumulator (470), and the high-pressure accumulator (460) and the low-pressure accumulator (470) are separately arranged on opposite sides of the impact flow distribution shell (420), and the high-pressure accumulator (460) and the low-pressure accumulator (470) are detachably connected with the impact flow distribution shell (420).

9. The hydraulic impactor of any one of claims 1 to 6, wherein, The gear box shell (320) is symmetrically provided with mounting holes (330) for mounting the hydraulic impactor on opposite sides of the impact flow distribution shell (420).

10. The hydraulic impactor of any one of claims 1 to 6, wherein, The front guide module (200) further comprises two drill supporting members (250), and the two drill supporting members (250) are arranged in a front-rear relationship in the first cavity and coaxially arranged with the first cavity, a through hole for the drill tail (100) to pass through is arranged in the middle of the drill supporting member (250), and an outer surface of the drill tail (100) is in contact and sliding connection with an inner wall of the through hole.

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