Hydraulic rotary impactor

Abstract

The utility model relates to the technical field of drilling and blasting, in particular to a hydraulic rotary impactor which comprises a shell, a hydraulic motor, a transmission shaft and an oil gas channel arranged in the shell, at least one opening of the oil gas channel is communicated with the outside of the shell, the transmission shaft is rotationally connected with the shell, and a connecting cavity is formed between the transmission shaft and the shell. The hydraulic motor is used for driving the transmission shaft to rotate, a first connecting hole is formed in the shell and used for communicating the connecting cavity with the oil-gas channel, so that when the hydraulic motor leaks, hydraulic oil can enter the oil-gas channel through the first connecting hole and leave the hydraulic rotary impactor through the oil-gas channel, and pressure building is avoided; and internal parts are damaged.

Description

Technical Field

[0001] The present application relates to the technical field of drilling and blasting, and in particular to a hydraulic rotary impactor. Background Art

[0002] At present, the rock drilling and blasting method is mostly used in mining, tunneling and underground rock excavation projects. The hydraulic rotary impactor has become the leading product in rock drilling and blasting projects with its advantages of high efficiency, low cost, cleanliness and safety. Among them, the hydraulic rotary impactor can be divided into two parts according to its function, one is the striking part and the other is the rotating part.

[0003] The striking part mainly outputs impact energy by pushing the shank through the piston, which causes relative movement between the shank, copper sleeve and guide sleeve. At present, corresponding oil and gas pipelines are generally set in the hydraulic rotary impactor to lubricate the gaps between these components by oil and gas lubrication.

[0004] The rotating part mainly uses the hydraulic motor to drive the small gear to rotate through the transmission shaft, and the small gear drives the large gear to rotate to output rotational force to the outside. The transmission shaft is installed in the housing and will rotate relative to the housing during use. Therefore, there is a gap between the transmission shaft and the housing, and the gap is generally filled with hydraulic oil.

[0005] In actual use, if the hydraulic motor leaks, the hydraulic oil will flow into the gap between the transmission shaft and the housing, causing pressure build-up. If it is not handled in time, it will seriously affect the normal operation of the hydraulic rotary impactor. Utility Model Content

[0006] The present application provides a hydraulic rotary impactor to solve the problem that when a hydraulic motor of an existing hydraulic rotary impactor leaks, pressure build-up occurs, which seriously affects the normal operation of the hydraulic rotary impactor.

[0007] In order to solve the above problems, this application adopts the following technical solutions:

[0008] A hydraulic rotary impactor comprises a shell, a hydraulic motor, a transmission shaft, and an oil and gas passage arranged in the shell, wherein the oil and gas passage has at least one opening connected to the outside of the shell, the transmission shaft is rotatably connected to the shell, and a connecting cavity is formed between the transmission shaft and the shell, the hydraulic motor is used to drive the transmission shaft to rotate, and a first connecting hole is provided on the shell, and the first connecting hole is used to connect the connecting cavity with the oil and gas passage.

[0009] In some possible designs, the first connecting hole is arranged at an angle.

[0010] In some possible designs, a one-way flow device is provided in the first connecting hole.

[0011] In some possible designs, it also includes a first gear, a spline sleeve, a shank, a second gear, a gearbox housing and an impact piston, one end of the gearbox housing is connected to the shell, the first gear is installed in the gearbox housing, a mounting hole is provided in the middle of the first gear, the shank is located in the mounting hole and is connected to the first gear through the spline sleeve, one end of the impact piston is located in the shell, and the other end extends into the mounting hole to push the shank to move, the second gear is installed on the transmission shaft, and the second gear is meshed with the first gear to drive the first gear to rotate.

[0012] In some possible designs, it further includes a first hydraulic stop piston, the first hydraulic stop piston is located in the housing, and one end of the first hydraulic stop piston abuts against the first gear;

[0013] The oil and gas channel includes a first flow channel, which is used to connect to an oil and gas lubrication system that supplies oil and gas; the first flow channel is formed between the housing, the first hydraulic stop piston and the gear box housing, and the first connecting hole is connected to the first flow channel.

[0014] In some possible designs, a backstop sleeve and a second hydraulic stop piston are further included, one end of the second hydraulic stop piston abuts against the end of the backstop sleeve, and the backstop sleeve is located between the impact piston and the first gear;

[0015] The oil and gas passage also includes a second flow channel and a third flow channel. The first hole groove is provided at one end of the stop sleeve abutting against the second hydraulic stop piston, so that the second flow channel is formed between the second hydraulic stop piston and the stop sleeve through the first hole groove, and a third flow channel is formed between the impact piston, the stop sleeve and the shank, and the second flow channel is connected to the third flow channel.

[0016] A second hole groove is provided at one end of the first hydraulic stop piston close to the gear box housing, and the first flow channel is connected to the second flow channel through the second hole groove.

[0017] In some possible designs, the oil and gas channel further includes a fourth flow channel communicated with the third flow channel, and the fourth flow channel is formed between the shank and the spline sleeve.

[0018] In some possible designs, it further includes a holding sleeve, a front guide housing and a quick-change water injection sleeve, wherein the holding sleeve is located between the quick-change water injection sleeve and the spline sleeve, the front guide housing is located outside the quick-change water injection sleeve and is coaxially arranged with the quick-change water injection sleeve, one end of the gear box housing is connected to the front guide housing, and the end of the shank passes through the holding sleeve and the quick-change water injection sleeve in sequence;

[0019] The oil and gas passage also includes a fifth flow channel communicated with the fourth flow channel, and the fifth flow channel is formed between the spline sleeve, the holding sleeve, the first gear, and the quick-change water injection sleeve.

[0020] In some possible designs, a copper sleeve is further included, the copper sleeve is located between the shank tail and the quick-change water injection sleeve, and the copper sleeve is located at one end of the quick-change water injection sleeve away from the holding sleeve;

[0021] The oil and gas channel also includes a sixth flow channel, a seventh flow channel and an eighth flow channel. The front guide shell is provided with a second connecting hole and a third connecting hole. The second connecting hole extends along the axial direction of the front guide shell, and one end of the second connecting hole is connected to the fifth flow channel, and the other end is connected to the third connecting hole. The second connecting hole and the third connecting hole constitute the sixth flow channel; the seventh flow channel is the fourth connecting hole arranged on the quick-change water injection sleeve, and the third connecting hole is connected to the fourth connecting hole; the eighth flow channel is an annular groove extending along the axial direction of the copper sleeve, and the annular groove is arranged away from the opening at one end of the holding sleeve, and the annular groove is connected to the seventh flow channel.

[0022] In some possible designs, the third connecting hole and the fourth connecting hole are both arranged at an angle, and the third connecting hole and the fourth connecting hole both extend from a connection point between the third connecting hole and the fourth connecting hole toward a direction close to the holding sleeve.

[0023] Beneficial effects of this application:

[0024] The present application provides a hydraulic rotary impactor, which opens a first connecting hole on a shell and connects the first connecting hole to a connecting cavity and an oil-gas passage, so that when a hydraulic motor leaks, the leaked oil can be discharged in time to avoid pressure build-up. Specifically, the hydraulic rotary impactor includes a shell, a hydraulic motor, a transmission shaft, and an oil-gas passage arranged in the shell. The oil-gas passage has at least one opening connected to the outside of the shell so that liquid entering the oil-gas passage can leave the shell through the opening. The transmission shaft is rotatably connected to the shell, and a connecting cavity is formed between the transmission shaft and the shell. The hydraulic motor is used to drive the transmission shaft to rotate, and the first connecting hole is connected to the connecting cavity. The connecting cavity and the oil and gas passage are connected. When the hydraulic motor leaks, hydraulic oil will flow into the connecting cavity and enter the oil and gas passage through the connecting cavity. As the hydraulic oil continues to leak, the hydraulic oil will eventually be discharged from the opening where the oil and gas passage is connected to the outside of the shell. This not only can relieve the pressure of the connecting cavity when the hydraulic oil leaks to avoid pressure build-up, but also allows the operator to directly observe whether the hydraulic oil is leaking through the opening where the oil and gas passage is connected to the outside of the shell, thereby improving the timeliness of problem discovery and avoiding further damage to the hydraulic rotary impactor, which is beneficial to improving the maintenance efficiency and work efficiency of the hydraulic rotary impactor. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present application and, together with the specification, are used to explain the principles of the present application. Obviously, the drawings described below are some embodiments of the present application, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 A schematic diagram of the structure of a hydraulic rotary impactor provided in an embodiment of the present application;

[0027] Figure 2 for Figure 1 A schematic diagram of the connection structure between the first connection hole and the connection cavity;

[0028] Figure 3 for Figure 1 A cross-sectional view of the oil and gas channels in the

[0029] Figure 4 for Figure 3 Schematic diagram of oil and gas channels in the;

[0030] Figure 5 for Figure 3 Schematic diagram of the direction of oil and gas channels in the.

[0031] Description of reference numerals:

[0032] 2-shank tail; 3-quick-change water injection sleeve; 4-front guide housing; 5-gearbox housing; 6-first gear; 7-spline sleeve; 8-retraction sleeve; 9-impact piston; 10-first hydraulic stop piston; 101-second hole groove; 11-second hydraulic stop piston; 12-housing; 121-first connecting hole; 122-one-way flow device; 13-holding sleeve; 14-copper sleeve; 15-transmission shaft; 16-hydraulic motor; 17-connection cavity;

[0033] a-first flow channel; b-second flow channel; c-third flow channel; d-fourth flow channel; e-fifth flow channel; f-sixth flow channel; g-seventh flow channel; h-eighth flow channel.

[0034] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0035] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0036] Secondly, it should be noted that in the description of the present application, terms such as "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the 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, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present application.

[0037] In addition, it should be noted that in the description of this application, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0038] The hydraulic rotary impactor can be divided into two parts according to its function, one is the striking part and the other is the rotating part. The striking part mainly outputs the impact energy by pushing the shank through the piston, which causes the shank to move relative to the copper sleeve and the guide sleeve. At present, the corresponding oil and gas pipeline is generally set in the hydraulic rotary impactor to lubricate the gaps of these components by oil and gas lubrication. Oil and gas lubrication adopts gas-liquid two-phase fluid lubrication. It uses compressed air and lubricating oil to mix in the mixing chamber. The compressed air can drive the lubricating oil to flow uninterruptedly along the inner wall of the oil and gas pipeline, and the thickness of the oil film gradually becomes thinner during the flow, and finally forms a lubricating film at the lubrication part for thin film lubrication, thereby realizing the lubrication between the internal components of the hydraulic rotary impactor. In addition, oil and gas lubrication belongs to open lubrication. After the oil and gas pass through the hydraulic rotary impactor, they are discharged from the outlet end of the oil and gas pipeline, which can take away the heat inside the hydraulic rotary impactor and prevent external impurities such as water vapor and dust from entering the hydraulic rotary impactor, causing pollution, wear or corrosion, and can play a good protective role for the hydraulic rotary impactor.

[0039] The rotating part mainly uses the hydraulic motor to drive the small gear to rotate through the transmission shaft, and the small gear drives the large gear to rotate to output rotational force to the outside. The transmission shaft is installed in the housing and will rotate relative to the housing during use. Therefore, there is a gap between the transmission shaft and the housing, and the gap is generally filled with hydraulic oil.

[0040] In actual use, if the hydraulic motor leaks, the hydraulic oil will flow into the gap between the transmission shaft and the housing, causing pressure build-up. If it is not handled in time, it will seriously affect the normal operation of the hydraulic rotary impactor.

[0041] In order to avoid the above-mentioned problems, the present application provides a hydraulic rotary impactor, which can discharge the hydraulic oil leaked from the hydraulic motor out of the casing after the hydraulic motor seal fails. This not only makes it easy for operators to quickly discover hydraulic motor leakage and perform maintenance in time, but also avoids the problem of working failure caused by pressure buildup, thereby effectively protecting the hydraulic rotary impactor.

[0042] The present application is described in detail below with reference to the accompanying drawings and specific embodiments:

[0043] See also Figure 1 and Figure 2 As shown, the present embodiment provides a hydraulic rotary impactor, comprising a housing 12, a hydraulic motor 16, a transmission shaft 15, and an oil and gas passage 1 arranged in the housing 12, wherein the oil and gas passage 1 has at least one opening connected to the outside of the housing 12, the transmission shaft 15 is rotatably connected to the housing 12, and a connecting cavity 17 is formed between the transmission shaft 15 and the housing 12, the hydraulic motor 16 is used to drive the transmission shaft 15 to rotate, and the hydraulic motor 16 can be connected to the transmission shaft 15 through a flat key, and a first connecting hole 121 is further provided on the housing 12, the first connecting hole 121 is used to connect the connecting cavity 17 and the oil and gas passage 1, so that when the hydraulic motor 16 leaks, the leaked hydraulic oil is sent away from the connecting cavity 17 through the oil and gas passage 1 to avoid the problem of pressure build-up.

[0044] Among them, one or more first connecting holes 121 can be provided, as long as all the first connecting holes 121 are connected with the oil and gas channel 1 and the connecting cavity 17 , the hydraulic oil flowing into the connecting cavity 17 can be sent away from the connecting cavity 17 .

[0045] It is understandable that the size of the first connecting hole 121 should not be too large, and it can be a damping hole, so that the hydraulic oil can enter the oil and gas channel 1 through the first connecting hole 121 only when a large amount of hydraulic oil flows into the connecting cavity 17, resulting in a high pressure in the connecting cavity 17. When there is no leakage in the hydraulic motor 16, the oil in the connecting cavity 17 will not enter the oil and gas channel 1 through the first connecting hole 121.

[0046] The oil and gas channel 1 can be a separately opened channel, or it can be an oil and gas pipeline originally used for oil and gas lubrication of the hydraulic rotary impactor. As long as at least one opening is connected to the outside of the shell 12, the hydraulic oil can be discharged smoothly.

[0047] Specifically, when the hydraulic motor 16 leaks, hydraulic oil will flow into the connecting cavity 17 and enter the oil and gas passage 1 through the connecting cavity 17. As the hydraulic oil continues to leak, the hydraulic oil will eventually be discharged from the opening connecting the oil and gas passage 1 with the outside of the shell 12. This not only relieves the pressure of the connecting cavity 17 when the hydraulic oil leaks to avoid pressure build-up, but also allows the operator to directly observe whether the hydraulic oil is leaking through the opening connecting the oil and gas passage 1 to the outside of the shell 12, thereby improving the timeliness of problem discovery and avoiding further damage to the hydraulic rotary impactor, which is beneficial to improving the maintenance efficiency and work efficiency of the hydraulic rotary impactor.

[0048] In some possible implementations, the first connecting hole 121 is arranged at an angle, which can reduce the probability of the liquid in the oil and gas channel 1 entering the connecting cavity 17 through the first connecting hole 121, so as to protect the motor part.

[0049] Furthermore, a one-way flow device 122 is provided in the first connecting hole 121, and the one-way flow device 122 makes the first connecting hole 121 a one-way flow hole, that is, the hydraulic oil can only leave the connecting cavity 17 through the first connecting hole 121, and the external fluid cannot enter the connecting cavity 17 through the first connecting hole 121.

[0050] It can be understood that the one-way flow device 122 can be a one-way valve, a one-way damping valve or other common devices that can enable one-way flow, which will not be described in detail in this example.

[0051] Exemplarily, when the one-way circulation device 122 is a one-way damping valve, the hydraulic oil can enter the oil and gas channel 1 through the first connecting hole 121 only when the oil pressure in the connecting cavity 17 reaches a certain value, while the return water in the oil and gas channel 1 cannot enter the connecting cavity 17 through the first connecting hole 121, thereby ensuring the cleanliness of the motor part and avoiding hydraulic oil contamination of the motor part.

[0052] For some possible implementations, see Figure 3 and Figure 4 As shown, the rotary impactor of the hydraulic motor 16 further includes a first gear 6 , a spline sleeve 7 , a shank 2 , a second gear, a gearbox housing 5 and an impact piston 9 .

[0053] One end of the gearbox housing 5 is connected to the housing 12. The first gear 6 is installed in the gearbox housing 5. A mounting hole is provided in the middle of the first gear 6. The mounting hole passes through the first gear 6. The shank tail 2 is located in the mounting hole and is connected to the first gear 6 through a spline sleeve 7, that is, the shank tail 2 can move forward and backward relative to the first gear 6, but cannot rotate relative to the first gear 6. One end of the impact piston 9 is located in the housing 12, and the other end extends into the mounting hole to push the shank tail 2 to move, so that the shank tail 2 can move forward and backward relative to the first gear 6. The second gear is installed on the transmission shaft 15 and can be connected to the second transmission shaft 15 through a flat key. The second gear meshes with the first gear 6 to drive the first gear 6 to rotate synchronously under the drive of the hydraulic motor 16.

[0054] Specifically, when the hydraulic rotary impactor is working, the hydraulic motor 16 is started, the transmission shaft 15 will drive the second gear to rotate, the first gear 6 is meshed with the second gear, and will rotate accordingly with the transmission shaft 15, thereby realizing the rotation work of the hydraulic rotary impactor. At the same time, the impact piston 9 will push the drill tail 2 to move, realizing the striking work of the hydraulic rotary impactor.

[0055] In some possible embodiments, the hydraulic rotary impactor also includes a first hydraulic stop piston 10, which is located in a shell 12, and an inner hole of the shell 12 cooperates with an outer cylindrical surface of the first hydraulic stop piston 10, and one end of the first hydraulic stop piston 10 cooperates with an end face of a large gear for axial fixation. It can be understood that the shell 12 cooperates with an end face of a gearbox housing 5 for axial fixation.

[0056] The oil and gas channel 1 includes a first flow channel a, which is used to connect to an oil and gas lubrication system that supplies oil and gas, wherein a first flow channel a is formed between the housing 12, the first hydraulic stop piston 10 and the gear box housing 5, and the first connecting hole 121 is connected to the first flow channel a, that is, a plug can be set outside the housing 12, and the oil and gas lubrication system is connected there, and this place is used as the inlet position of the oil and gas channel 1.

[0057] It is understandable that the oil-gas lubrication system is well known to those skilled in the art, and will not be described in detail in this embodiment. Of course, the compressed air providing the air source, whether it is on-board or external, needs to be clean and dry.

[0058] The first connecting hole 121 is opened on the shell 12, and the first flow channel a is formed by the gap between the shell 12, the first hydraulic stop piston 10, and the gear box housing 5, so that the first connecting hole 121 is directly connected to the first flow channel a, which can avoid pressure build-up when the hydraulic motor 16 leaks, improve the convenience of setting, and reduce the difficulty of processing.

[0059] In some possible embodiments, the hydraulic rotary impactor also includes a stop sleeve 8 and a second hydraulic stop piston 11, one end of the second hydraulic stop piston 11 abuts against the end of the stop sleeve 8 for axial constraint and fixation, and the stop sleeve 8 is located between the impact piston 9 and the first gear 6.

[0060] Among them, the oil and gas channel 1 also includes a second flow channel b and a third flow channel c, and the edge of the stop sleeve 8 (the end abutting against the second hydraulic stop piston 11) is provided with a first hole groove, so as to form the second flow channel b between the second hydraulic stop piston 11 and the stop sleeve 8 through the first hole groove. The third flow channel c is formed between the impact piston 9, the stop sleeve 8 and the shank 2, that is, the inner hole of the second hydraulic stop piston 11 is slidably matched with the outer cylindrical surface of the impact piston 9, and the outer cylindrical surface of the impact piston 9 is coaxial with the inner hole of the stop sleeve 8 but has different diameters, the outer diameter of the impact piston 9 is smaller than the inner diameter of the inner hole of the stop sleeve 8, and the shank 2 and the stop sleeve 8 have a space distance in the axial direction, so that the third flow channel c can be formed between the impact piston 9, the stop sleeve 8 and the shank 2, and one end of the second flow channel b is connected with the third flow channel c.

[0061] In addition, in order to connect the first flow channel a with the second flow channel b, a second hole groove 101 is provided on the edge of the first hydraulic stop piston 10 (close to one end of the gear box housing 5), so that a cavity for fluid to pass through is formed between the first hydraulic stop piston 10 and the end face of the first gear 6, and the first flow channel a and the second flow channel b are connected through the second hole groove 101, so that the fluid can flow through the first flow channel a, the second hole groove 101, the second flow channel b and the third flow channel c.

[0062] In this way, the first flow channel a, the second flow channel b and the third flow channel c are connected, and oil and gas lubrication between the shank 2, the impact piston 9 and the stop sleeve 8 can be achieved without complex structural design.

[0063] In order to improve the sealing performance, a sealing device may be provided on the end surface of the first gear 6 for sealing, so as to improve the sealing effect of the hydraulic oil inside the first gear 6 and better ensure the operating condition of the first gear 6 .

[0064] In some possible implementations, the oil and gas channel 1 also includes a fourth flow channel d connected to the third flow channel c, and the fourth flow channel d is formed between the shank 2 and the spline sleeve 7, that is, the shank 2 and the spline sleeve 7 are splined, and there is a large gap between the two, and there is a certain cavity space, which is the fourth flow channel d.

[0065] The third flow channel c is communicated with the fourth flow channel d, and oil-gas lubrication between the shank 2 and the spline sleeve 7 can be achieved without additional processing.

[0066] In some possible embodiments, the hydraulic rotary impactor also includes a holding sleeve 13, a front guide shell 4 and a quick-change water injection sleeve 3. The holding sleeve 13 is located between the quick-change water injection sleeve 3 and the spline sleeve 7. The front guide shell 4 is located on the outside of the quick-change water injection sleeve 3 and is coaxially arranged with the quick-change water injection sleeve 3, that is, a through hole is opened in the middle of the front guide shell 4, and the quick-change water injection sleeve 3 is installed in the through hole. One end of the gear box shell 5 is connected to the front guide shell 4 to achieve axial fixed constraint of the gear box shell 5 through the cooperation of the shell 12 and the front guide shell 4. The end of the shank 2 passes through the holding sleeve 13 and the quick-change water injection sleeve 3 in turn, and extends to the outside of the quick-change water injection sleeve 3, and the shank 2 can move forward and backward relative to the retaining sleeve and the quick-change water injection sleeve 3.

[0067] In order to ensure a hydraulic oil lubricated environment inside the gear box housing 12 , a special sealing device may be provided at the end of the gear box housing 12 for sealing.

[0068] The oil and gas channel 1 further includes a fifth flow channel e connected to the fourth flow channel d, and the fifth flow channel e is formed among the spline sleeve 7 , the holding sleeve 13 , the first gear 6 , and the quick-change water injection sleeve 3 .

[0069] Specifically, there is a gap between the spline sleeve 7 and the retaining sleeve, and there is also a gap between the first gear 6, the front guide housing 4 and the gear box housing 5. The two gaps are interconnected to form the fifth flow channel e, and the gap between the spline sleeve 7 and the retaining sleeve is connected to the fourth flow channel d. Therefore, there is no need for additional processing of the components to achieve oil and gas lubrication between the first gear 6, the front guide housing 4 and other components, which helps to reduce the difficulty of processing.

[0070] In some possible embodiments, the hydraulic rotary impactor also includes a copper sleeve 14, which is located on the inner side of the quick water injection sleeve, and the inner hole of the quick water injection sleeve 3 is matched with the outer cylindrical surface of the copper sleeve 14, and the inner hole of the copper sleeve 14 is gap matched with the outer cylindrical surface of the shank 2, that is, the copper sleeve 14 is located between the quick water injection sleeve 3 and the shank 2, and the copper sleeve 14 is located at the end of the quick water injection sleeve 3 away from the holding sleeve 13.

[0071] In order to effectively seal, sealing rings can be provided at both ends of the quick-change water injection sleeve 3, one side of the sealing ring contacts the drill tail 2, so that the fluid cannot enter or leave the hydraulic rotary impactor through the position of the sealing ring.

[0072] The oil and gas channel 1 also includes a sixth flow channel f, a seventh flow channel g and an eighth flow channel h.

[0073] Specifically, a second connecting hole and a third connecting hole are provided on the front guide shell 4. The second connecting hole extends axially along the front guide shell 4, and one end of the second connecting hole is connected to the fifth flow channel e, and the other end is connected to the third connecting hole. The second connecting hole and the third connecting hole constitute the sixth flow channel f.

[0074] The seventh flow channel g is the fourth connecting hole arranged on the quick-change water injection sleeve 3, and the third connecting hole is connected with the fourth connecting hole at one end away from the second connecting hole, thereby realizing the connection between the sixth flow channel f and the seventh flow channel g.

[0075] The eighth flow channel h is an annular groove extending along the axial direction of the copper sleeve 14. The annular groove is a groove arranged on the copper sleeve 14. The annular groove is arranged away from the opening at one end of the holding sleeve 13. The annular groove is connected with the seventh flow channel g, so that the oil and gas channel 1 is connected with the outside world through the eighth flow channel h.

[0076] Specifically, see Figure 4 and Figure 5 As shown, the fluid inside the hydraulic rotary impactor passes through the first flow channel a, the second hole groove 101, the second flow channel b, the third flow channel c, the fourth flow channel d, the fifth flow channel e, the sixth flow channel f, the seventh flow channel g, and the eighth flow channel h in sequence, and then leaves the hydraulic rotary impactor from the end of the eighth flow channel h.

[0077] Furthermore, the third connecting hole and the fourth connecting hole are both arranged at an angle, and the third connecting hole and the fourth connecting hole both extend from the connection point between the two in the direction close to the holding sleeve 13, so that the third connecting hole and the fourth connecting hole play a certain role in preventing backflow, that is, reducing the probability of external sewage entering the hydraulic rotary impactor through the third connecting hole and the fourth connecting hole, so as to provide better protection for the hydraulic rotary impactor.

[0078] With such an arrangement, when the seal of the hydraulic motor 16 fails, the oil pressure in the connecting cavity 17 increases, so that the hydraulic oil entering the connecting cavity 17 can enter the first flow channel a through the first connecting hole 121. When the hydraulic rotary impactor is working normally, the hydraulic oil entering the first flow channel a will be carried out of the device through the oil and gas channel 1 by the "gas". At this time, the operator can clearly see the oil mist from the front end of the drill tail 2 (extending to one end of the quick-change water injection sleeve 3). At this time, the operator can determine that the seal of the hydraulic motor 16 has failed, and stop the device in time to inspect and repair it to avoid causing greater losses.

[0079] In addition, during the use of the hydraulic rotary impactor, for example, when it is not parallel to the axis of the drill tail 2, that is, when it is perpendicular to the axis of the drill tail 2 or at a certain angle to the axis of the drill tail 2, the returned sewage will enter the interior of the hydraulic rotary impactor through the oil and gas channel 1. If the water cannot be discharged, the water remaining inside the hydraulic rotary impactor will easily cause rust on various components, affecting the service life of the hydraulic rotary impactor. The setting of the oil and gas channel 1 in this embodiment can use "gas" to discharge the return water (rock residue) from the hydraulic rotary impactor during the impact drilling process of the hydraulic rotary impactor, thereby playing a better protective role for the hydraulic rotary impactor. That is, under the normal working condition of the hydraulic rotary impactor, the gas circuit is connected, and the return water will be discharged from the hydraulic rotary impactor through the oil and gas channel 1 under the action of "gas", thereby ensuring the cleanliness of the interior of the hydraulic rotary impactor and improving the service life of the hydraulic rotary impactor and the overall performance of the hydraulic rotary impactor.

[0080] In a small amount of special circumstances, the return water may reach the first flow channel a. At this time, since the first connecting hole 121 is an inclined hole and a one-way flow device 122 is provided in the first connecting hole 121, the return water entering the first flow channel a cannot enter the connecting cavity 17 through the first connecting hole 121, thereby ensuring the cleanliness of the motor part and avoiding hydraulic oil contamination.

[0081] In summary, the hydraulic rotary impactor of the embodiment of the present application has at least the following advantages over the existing hydraulic rotary impactor:

[0082] 1. A first connecting hole 121 is provided, and a one-way flow device 122 is added in the first connecting hole 121. On the one hand, water can be prevented from entering the connecting cavity 17, effectively ensuring the cleanliness of the hydraulic oil. On the other hand, when the hydraulic motor 16 leaks, the hydraulic oil in the connecting cavity 17 can be discharged to avoid the situation of pressure holding. At the same time, when the hydraulic oil is discharged through the oil and gas channel 1, the operator can directly observe the oil mist, which helps the operator to timely inspect and repair the hydraulic rotary impactor;

[0083] 2. The oil and gas channel 1 is set in such a way that when the hydraulic oil leaks, the leaked hydraulic oil can be sent out of the hydraulic rotary impactor by "gas", which is convenient for the operator to observe;

[0084] 3. When water returns, the return water can be directly discharged from the hydraulic rotary impactor through the normal operation of the hydraulic rotary impactor, which has a good protective effect on the hydraulic rotary impactor;

[0085] 4. It can be applied to rock drills or other similar equipment, with wide applicability;

[0086] 5. The overall structure is simple, the processing difficulty is low, and it is convenient to use.

[0087] Those skilled in the art will easily conceive of other implementations of the present application after considering the specification and practicing the technical solutions disclosed herein.

[0088] This application is intended to cover any modifications, uses or adaptive changes of the present application, which follow the general principles of the present application and include common knowledge or customary technical means in the technical field that are not disclosed in this application.

[0089] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A hydraulic rotary impactor, characterized in that: The invention comprises a housing (12), a hydraulic motor (16), a transmission shaft (15), and an oil and gas passage (1) arranged in the housing (12); the oil and gas passage (1) has at least one opening connected to the outside of the housing (12); the transmission shaft (15) is rotatably connected to the housing (12), and a connecting cavity (17) is formed between the transmission shaft (15) and the housing (12); the hydraulic motor (16) is used to drive the transmission shaft (15) to rotate; a first connecting hole (121) is provided on the housing (12), and the first connecting hole (121) is used to connect the connecting cavity (17) and the oil and gas passage (1).

2. The hydraulic rotary impactor according to claim 1, characterized in that: The first connecting hole (121) is arranged obliquely.

3. The hydraulic rotary impactor according to claim 2, characterized in that: A one-way flow device (122) is provided in the first connecting hole (121).

4. The hydraulic rotary impactor according to any one of claims 1 to 3, characterized in that: It also comprises a first gear (6), a spline sleeve (7), a shank (2), a second gear, a gearbox housing (5) and an impact piston (9), wherein one end of the gearbox housing (5) is connected to the housing (12), the first gear (6) is mounted in the gearbox housing (5), a mounting hole is provided in the middle of the first gear (6), the shank (2) is located in the mounting hole and is connected to the first gear (6) through the spline sleeve (7), one end of the impact piston (9) is located in the housing (12), and the other end extends into the mounting hole to push the shank (2) to move, the second gear is mounted on the transmission shaft (15), and the second gear is meshed with the first gear (6) to drive the first gear (6) to rotate.

5. The hydraulic rotary impactor according to claim 4, characterized in that: It also includes a first hydraulic stop piston (10), the first hydraulic stop piston (10) is located in the housing (12), and one end of the first hydraulic stop piston (10) is in contact with the first gear (6); The oil-gas passage (1) comprises a first flow passage (a), and the first flow passage (a) is used to connect to an oil-gas lubrication system that supplies oil and gas; the first flow passage (a) is formed between the housing (12), the first hydraulic stop piston (10) and the gearbox housing (5), and the first connecting hole (121) is connected to the first flow passage (a).

6. The hydraulic rotary impactor according to claim 5, characterized in that: It also includes a stop sleeve (8) and a second hydraulic stop piston (11), one end of the second hydraulic stop piston (11) abuts against the end of the stop sleeve (8), and the stop sleeve (8) is located between the impact piston (9) and the first gear (6); The oil and gas passage (1) further comprises a second flow passage (b) and a third flow passage (c); a first hole groove is provided at one end of the stop sleeve (8) abutting against the second hydraulic stop piston (11), so that the second flow passage (b) is formed between the second hydraulic stop piston (11) and the stop sleeve (8) through the first hole groove, and a third flow passage (c) is formed between the impact piston (9), the stop sleeve (8) and the shank (2); the second flow passage (b) is communicated with the third flow passage (c); A second hole groove (101) is provided at one end of the first hydraulic stop piston (10) close to the gear box housing (5), and the first flow channel (a) and the second flow channel (b) are connected via the second hole groove (101).

7. The hydraulic rotary impactor according to claim 6, characterized in that: The oil and gas passage (1) further comprises a fourth flow passage (d) communicating with the third flow passage (c), and the fourth flow passage (d) is formed between the shank (2) and the spline sleeve (7).

8. The hydraulic rotary impactor according to claim 7, characterized in that: It also comprises a holding sleeve (13), a front guide housing (4) and a quick-change water injection sleeve (3); the holding sleeve (13) is located between the quick-change water injection sleeve (3) and the spline sleeve (7); the front guide housing (4) is located outside the quick-change water injection sleeve (3) and is coaxially arranged with the quick-change water injection sleeve (3); one end of the gear box housing (5) is connected to the front guide housing (4); the end of the shank tail (2) passes through the holding sleeve (13) and the quick-change water injection sleeve (3) in sequence; The oil and gas passage (1) further comprises a fifth flow passage (e) connected to the fourth flow passage (d), and the fifth flow passage (e) is formed between the spline sleeve (7), the holding sleeve (13), the first gear (6), and the quick-change water injection sleeve (3).

9. The hydraulic rotary impactor according to claim 8, characterized in that: It also comprises a copper sleeve (14), wherein the copper sleeve (14) is located between the shank tail (2) and the quick-change water injection sleeve (3), and the copper sleeve (14) is located at one end of the quick-change water injection sleeve (3) away from the holding sleeve (13); The oil and gas passage (1) also includes a sixth flow channel (f), a seventh flow channel (g) and an eighth flow channel (h). The front guide shell (4) is provided with a second connecting hole and a third connecting hole. The second connecting hole extends along the axial direction of the front guide shell (4), and one end of the second connecting hole is connected to the fifth flow channel (e), and the other end is connected to the third connecting hole. The second connecting hole and the third connecting hole constitute the sixth flow channel (f); the seventh flow channel (g) is a fourth connecting hole provided on the quick-change water injection sleeve (3), and the third connecting hole is connected to the fourth connecting hole; the eighth flow channel (h) is an annular groove extending along the axial direction of the copper sleeve (14), and the annular groove is arranged away from the opening at one end of the holding sleeve (13), and the annular groove is connected to the seventh flow channel (g).

10. The hydraulic rotary impactor according to claim 9, characterized in that: The third connecting hole and the fourth connecting hole are both arranged obliquely, and the third connecting hole and the fourth connecting hole both extend from the connection point between the third connecting hole and the fourth connecting hole in a direction close to the holding sleeve (13).

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