Laser ultrasonic coaxial composite rock crushing device

Abstract

The invention provides a laser ultrasonic coaxial composite rock crushing device, and relates to the technical field of drilling equipment. The laser irradiation module comprises an optical isolator and a lens which are coaxially arranged; the ultrasonic drilling module comprises an ultrasonic transducer, a spiral groove amplitude-change pole, a first elastic piece and a drill bit, the upper end of the spiral groove amplitude-change pole is connected with the ultrasonic transducer, the lower end of the spiral groove amplitude-change pole is connected with the drill bit, the first elastic piece is connected with the lower end of the spiral groove amplitude-change pole, and a plurality of spiral grooves are formed in the outer wall of the spiral groove amplitude-change pole; the spiral groove amplitude-change pole and the drill bit are both arranged in a hollow mode to form a laser channel. The device has the beneficial effects that when the ultrasonic transducer drives the drill bit to drill a drilling point position, laser spots output by the optical isolator irradiate the drilling point position through the lens and the laser channel, and rocks are broken in a composite mode of the laser heat effect and the ultrasonic vibration effect; and when the melt on the surface of the rock is not formed, the drill bit realizes rock breaking, and the problem that the laser rock breaking efficiency is reduced due to the secondary effect is solved.

Description

Technical Field

[0001] The invention relates to the technical field of drilling equipment, and in particular to a laser ultrasonic coaxial composite rock crushing device. Background Art

[0002] In the process of oil and gas resources and mineral exploitation, as the drilling depth increases, the problem of crushing high-hardness rocks becomes increasingly prominent, and the efficiency of rock crushing greatly affects the overall operating efficiency. The traditional method used in geological exploration and oil and gas production is mechanical rock breaking, which uses the high torque, high speed and high pressure of the drill bit to increase the drilling speed. Therefore, the drill bit wears more seriously and has a shorter working life. Since the existing mechanical rock breaking methods are limited in their ability to increase drilling speed, new rock breaking methods are constantly emerging. The use of plasma, electron beam, laser, microwave and ultrasonic methods to assist mechanical rock breaking can reduce the cost of frequent replacement of drilling tools in mechanical rock breaking methods, save time, and effectively improve the efficiency of rock crushing. However, each rock breaking method also has some limiting factors in the actual working process.

[0003] Laser rock breaking is a non-contact physical and chemical rock breaking method that uses a high-energy laser beam to act on the rock surface, causing local thermal crushing, melting and gasification of the rock. In the process of laser rock breaking, secondary effects will occur. As the drilling depth increases, the rock will produce a large amount of molten material due to the absorption of laser heat. Due to the limitation of laser energy, the molten material cannot be completely vaporized, but will recondense or accumulate around the hole wall and the bottom to form residues, which will continuously absorb laser energy and hinder further drilling of the laser. In addition, the already vaporized rock material will be heated by the laser to form ionized plasma, which will absorb laser energy and hinder further contact between the laser and the rock surface material. Therefore, the holes drilled by the laser are generally in the shape of an inverted cone with a wide top and a narrow bottom. The secondary effect will cause the loss of laser energy and reduce the efficiency of laser rock breaking. Summary of the invention

[0004] In view of this, in order to solve the problem that the laser rock crushing process may produce secondary effects and reduce the efficiency of laser rock crushing, an embodiment of the present invention provides a laser ultrasonic coaxial composite rock crushing device.

[0005] An embodiment of the present invention provides a laser ultrasonic coaxial composite rock crushing device, comprising:

[0006] shell;

[0007] A laser irradiation module is disposed inside the housing, and comprises a coaxially arranged optical isolator and a lens, wherein the lens is disposed below the laser irradiation module;

[0008] and an ultrasonic drilling module, which is arranged inside the housing, the ultrasonic drilling module comprising an ultrasonic transducer, a spiral groove horn, a first elastic member and a drill bit, wherein the ultrasonic transducer is arranged below the lens, the upper end of the spiral groove horn is connected to the ultrasonic transducer, and the lower end is connected to the drill bit, the first elastic member is fixedly arranged around the drill bit and connected to the lower end of the spiral groove horn, the spiral groove horn is a cone with a diameter gradually decreasing from top to bottom, the outer wall of the spiral groove horn is provided with a plurality of spiral grooves, the spiral groove horn and the drill bit are both hollowly arranged to form a laser channel coaxially arranged with the lens;

[0009] While the ultrasonic transducer drives the drill bit to drill the drilling point, the laser spot output by the optical isolator irradiates the drilling point via the lens and the laser channel. The laser heats the drilling point to reduce the rock strength, thereby increasing the drilling speed of the drill bit.

[0010] Furthermore, the ultrasonic drilling module also includes a cylindrical impact head, the upper end of the drill bit is provided with a cylindrical socket, the lower end of the spiral groove amplitude transformer is provided with a plug joint, the plug joint is inserted into the socket, the impact head is fixedly sleeved on the periphery of the socket, and the upper end of the impact head is abutted against the lower end of the spiral groove amplitude transformer, and the lower end is connected to the first elastic member.

[0011] Furthermore, the ultrasonic drilling module also includes a rotor, which is rotatably disposed in the socket and the upper end is in contact with the plug connector. The rotor is coaxially disposed with the lens and has an inner hole, which is axially penetrated by the rotor and located on the laser channel.

[0012] Furthermore, the rotor is a hollow cylinder, the outer diameter of the rotor is the same as the diameter of the plug connector and smaller than the inner diameter of the socket, and the upper end of the rotor abuts against the plug connector.

[0013] Furthermore, the ultrasonic drilling module also includes a support tube coaxially arranged with the spiral groove amplitude transformer, the support tube includes an upper cylinder, a connecting plate and a lower cylinder connected in sequence, the lower cylinder is rotatably connected to the outer shell, the connecting plate is rotatably supported in the outer shell, the first elastic member is a first spring, the upper end of the first spring is sleeved and fixed to the lower end of the impact head, and the lower end is sleeved and fixed on the upper cylinder.

[0014] Furthermore, the ultrasonic drilling module also includes a second elastic member, which is arranged around the drill bit, and the upper end of the second elastic member is connected to the bottom of the socket slot, and the lower end of the second elastic member is connected to the middle of the connecting plate.

[0015] Furthermore, the ultrasonic drilling module also includes a hollow screw, the upper end of which is connected to the ultrasonic transducer, and the lower end of which is inserted into the inner hole of the spiral groove amplitude transformer and threadedly connected to the spiral groove amplitude transformer.

[0016] Furthermore, the ultrasonic transducer includes a piezoelectric ceramic stack, a pressure cover and a nut. A support plate is provided at the upper end of the spiral groove amplitude rod. The edge of the support plate is fixedly connected to the outer shell. The support plate is provided with an annular groove. The annular groove is arranged around the spiral groove amplitude rod so that the thickness of the connection between the support plate and the spiral groove amplitude rod is reduced. The piezoelectric ceramic stack is supported on the support plate, and the pressure cover is arranged on the upper part of the piezoelectric ceramic stack. The upper end of the screw rod passes through the support plate, the piezoelectric ceramic stack and the pressure cover, and is tightly connected to the nut.

[0017] Furthermore, a sealing head is provided at the front end of the inner hole of the drill bit, and the sealing head is made of a light-transmitting material.

[0018] Furthermore, it also includes a control system, and a laser and an ultrasonic generator connected to the control system, the laser is connected to the optical isolator, and the ultrasonic generator is connected to the ultrasonic transducer.

[0019] The beneficial effects brought about by the technical solution provided by the embodiment of the present invention are:

[0020] 1. A laser ultrasonic coaxial composite rock crushing device of the present invention comprises a laser irradiation module and an ultrasonic drilling module coaxially arranged. When the ultrasonic transducer drives the drill bit to drill the drilling point, the laser spot output by the optical isolator irradiates the drilling point via the lens and the laser channel. The rock is crushed by a composite method of the laser thermal effect and the ultrasonic vibration effect. When the laser irradiates the rock surface and the molten material has not yet formed, the drill bit has achieved the rock breaking effect and reached the inside of the rock, thereby preventing the rock from absorbing the laser heat and generating a large amount of molten material that will recondense or accumulate to form residues, thereby solving the problem of secondary effects in the process of laser rock crushing that reduces the efficiency of laser rock crushing.

[0021] 2. In a laser ultrasonic coaxial composite rock crushing device of the present invention, the ultrasonic drilling module generates longitudinal simple harmonic vibration through the ultrasonic transducer to drive the movement of the spiral groove amplitude transformer. The spiral groove amplitude transformer converts the longitudinal simple harmonic vibration into longitudinal simple harmonic vibration and circumferential torsional motion under the action of the spiral groove on its surface, thereby driving the drill bit to vibrate longitudinally and twist at the same time, and the spiral groove amplitude transformer is constrained by the impact head and the first elastic member, so that the laser channel and the lens of the drill bit remain coaxial during the drilling process, ensuring that the laser spot output by the optical isolator can accurately irradiate the drilling point.

[0022] 3. The laser ultrasonic coaxial composite rock crushing device of the present invention is particularly suitable for hard rock drilling. It utilizes the heat generated by single-point laser irradiation and the drill bit to act on the designated drilling point of the rock, thereby reducing the strength of the rock while achieving the drilling effect, thereby effectively improving the drilling speed of the ultrasonic transducer. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a stereoscopic diagram of a laser ultrasonic coaxial composite rock crushing device of the present invention;

[0024] Figure 2 This is an exploded view of a laser ultrasonic coaxial composite rock crushing device of the present invention;

[0025] Figure 3 It is a cross-sectional view of a laser ultrasonic coaxial composite rock crushing device of the present invention;

[0026] Figure 4 yes Figure 3 A partial enlarged view of the middle A;

[0027] Figure 5 is a schematic diagram of a spiral groove horn;

[0028] Figure 6 This is a connection diagram of the upper end of the drill bit;

[0029] Figure 7 It is a schematic diagram of another embodiment of a laser ultrasonic coaxial composite rock crushing device of the present invention.

[0030] In the figure: 1, shell; 2, spiral groove amplitude rod; 3, drill bit; 4, upper shell; 5, middle shell; 6, lower shell; 7, extension tube; 8, optical isolator; 9, lens; 10, fixing tube; 11, piezoelectric ceramic stack; 12, gland; 13, nut; 14, screw; 15, support plate; 16, annular groove; 17, laser channel; 18, plug connector; 19, impact head; 20, rotor; 21, first elastic member; 22, second elastic member; 23, upper cylinder; 24, connecting plate; 25, lower cylinder; 26, bearing; 27, spiral groove; 100, laser; 200, ultrasonic generator; 300, control system. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the present invention clearer, the following will further describe the embodiments of the present invention in conjunction with the accompanying drawings. The following is a preferred embodiment of the present invention, which is intended to provide a basic understanding of the present invention, but is not intended to confirm the key or decisive elements of the present invention or to limit the scope of protection.

[0032] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0033] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0034] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in the subsequent drawings. At the same time, it should be understood that for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship.

[0035] It should be noted that, unless otherwise clearly specified and limited, the terms "installation" 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 an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] Please refer to Figure 1 , 2 and 3. An embodiment of the present invention provides a laser ultrasonic coaxial composite rock crushing device, comprising a housing 1, a laser irradiation module and an ultrasonic drilling module.

[0037] The housing 1 is used to encapsulate and protect the laser irradiation module and the ultrasonic drilling module. The shape of the housing 1 can be flexibly set according to the actual application scenario, and is generally set to a cylindrical shape. As described in this embodiment, the housing 1 includes an upper housing 4, a middle housing 5, and a lower housing 6 connected in sequence. The upper housing 4, the middle housing 5, and the lower housing 6 are cylindrical in shape with successively decreasing diameters.

[0038] The laser irradiation module is arranged inside the housing 1, specifically, at the upper part of the housing 1. As described in this embodiment, the laser irradiation module is mainly arranged in the upper housing 4. The laser irradiation module includes a coaxially arranged optical isolator 8 and a lens 9, wherein the optical isolator 8 is arranged at the upper part of the upper housing 4, and the lens 9 is arranged at the lower end of the upper housing 4 and below the laser irradiation module. Here, a fixed tube 10 is provided below the optical isolator 8, and the fixed tube 10 passes through the lower end of the upper housing 4, and the lens 9 is installed in the fixed tube 10. The laser output by the optical isolator 8 passes through the lens 9 to form a laser beam with a predetermined spot diameter.

[0039] The ultrasonic drilling module is disposed inside the housing 1, specifically, at the lower part of the housing 1. Figure 4 , 5 As shown in Figures 6 and 7, the ultrasonic drilling module in this embodiment is mainly arranged in the middle shell 5 and the lower shell 6. The ultrasonic drilling module includes an ultrasonic transducer, a spiral groove amplitude rod 2, a first elastic member 21 and a drill bit 3. The ultrasonic transducer is arranged in the middle shell 5 and is located below the lens 9. The upper end of the spiral groove amplitude rod 2 is connected to the ultrasonic transducer and the lower end is connected to the drill bit 3. The first elastic member 21 is fixedly arranged around the drill bit 3 and connected to the lower end of the spiral groove amplitude rod 2. The spiral groove amplitude rod 2 is a cone with a gradually decreasing diameter from top to bottom. The outer wall of the spiral groove amplitude rod 2 is provided with a plurality of spiral grooves 27. The spiral groove amplitude rod 2 and the drill bit 3 are both hollowly arranged to form a laser channel 17 coaxially arranged with the lens 9.

[0040] The ultrasonic transducer can generate high-frequency longitudinal simple harmonic vibration when working. When the simple harmonic vibration is transmitted to the spiral groove amplitude transformer 2, the spiral groove amplitude transformer 2 performs elliptical motion due to the spiral grooves 27 on the surface, realizing longitudinal amplitude and torsional amplitude, thereby driving the drill bit 3 to vibrate longitudinally and torsional.

[0041] The ultrasonic drilling module also includes a hollow screw 14, the upper end of which is connected to the ultrasonic transducer, and the lower end is inserted into the inner hole of the spiral groove horn 2 and threadedly connected to the spiral groove horn 2. Specifically, the ultrasonic transducer includes a piezoelectric ceramic stack 11, a gland 12 and a nut 13. The upper end of the spiral groove horn 2 is provided with a support plate 15, the piezoelectric ceramic stack 11 is supported on the support plate 15, the gland 12 is arranged on the upper part of the piezoelectric ceramic stack 11, and the upper end of the screw 14 passes through the support plate 15, the piezoelectric ceramic stack 11 and the gland 12, and is fastened to the nut 13. The inner hole of the threaded rod is located on the laser channel 17.

[0042] In some embodiments, the support plate 15 is a flange plate, and the edge of the support plate 15 is clamped and fixed by the upper end of the middle shell 5 and the upper end of the lower shell 6. The support plate 15 is provided with an annular groove 16, and the annular groove 16 is arranged around the spiral groove horn 2, so that the thickness of the connection between the support plate 15 and the spiral groove horn 2 is reduced. In this way, the amplitude of the edge of the support plate 15 can be reduced, the amplitude of the spiral groove horn 2 can be increased, and the drilling efficiency can be improved.

[0043] In some embodiments, the ultrasonic drilling module further includes a cylindrical impact head 19. Specifically, the lower end of the lower shell 6 is provided with an extension tube 7 extending downward, the upper end of the drill bit 3 is provided with a cylindrical socket, the socket is located at the upper end of the extension tube 7, the lower end of the spiral groove amplitude transformer 2 is provided with a plug connector 18, the plug connector 18 is inserted into the socket, the impact head 19 is fixedly sleeved on the periphery of the socket, and the upper end of the impact head 19 is against the lower end of the spiral groove amplitude transformer 2, and the lower end is connected to the first elastic member 21. The impact head 19 ensures that when the drill bit 3 vibrates longitudinally and torsional, the inner hole of the drill bit 3 and the inner hole of the spiral groove amplitude transformer 2 remain coaxially arranged to ensure the coaxiality of the laser channel 17.

[0044] In some embodiments, the ultrasonic drilling module further comprises a support cylinder coaxially arranged with the spiral groove amplitude transformer 2, the support cylinder comprising an upper cylinder 23, a connecting plate 24 and a lower cylinder 25 connected in sequence, and the lower cylinder 25 is rotatably connected to the housing 1. As described herein, the outer sleeve of the lower cylinder 25 is provided with a bearing 26, and the bearing 26 is installed at the lower end of the extension cylinder 7. The connecting plate 24 is rotatably supported in the housing 1 and arranged around the drill bit 3, and the first elastic member 21 is a first spring, the upper end of the first spring is sleeved and fixed to the lower end of the impact head, and the lower end is sleeved and fixed on the upper cylinder 23. The support cylinder constrains the lower end of the spiral groove amplitude transformer 2, so that the spiral groove amplitude transformer 2 can only perform axial movement and rotation, and by limiting the movement direction of the spiral groove amplitude transformer 2, the coaxiality of the laser channel 17 is guaranteed to a greater extent.

[0045] In some embodiments, the ultrasonic drilling module further includes a second elastic member 22, which is a second spring. The second elastic member 22 surrounds the drill bit 3 and is coaxially arranged with the drill bit 3. The upper end of the second elastic member 22 is connected to the bottom of the socket, and the lower end is connected to the middle of the connecting plate 24. The second elastic member 22 and the support cylinder constrain the drill bit 3 so that the drill bit 3 can only move axially and rotate. By limiting the movement direction of the drill bit 3, the coaxiality of the laser channel 17 is guaranteed to a greater extent.

[0046] In some embodiments, the ultrasonic drilling module further includes a rotor 20, which is rotatably disposed in the socket and the upper end of which contacts the plug connector 18. The rotor 20 is coaxially disposed with the lens 9, and the rotor 20 has an inner hole, which is axially penetrated by the rotor 20 and is located on the laser channel 17. The rotor 20 is a hollow cylinder, the outer diameter of the rotor 20 is the same as the diameter of the plug connector 18, and is smaller than the inner diameter of the socket, and the upper end of the rotor 20 abuts against the plug connector 18. The spiral groove amplitude rod 2 transmits the simple harmonic vibration to the drill bit 3 through the rotor 20.

[0047] Considering that the front end of the drill bit 3 is in direct contact with the rock, in order to prevent the rock debris generated during the rock crushing process from entering the inside of the drill bit 3, a head is provided at the front end of the inner hole of the drill bit 3, and the head is made of a light-transmitting material. The head has a small weakening effect on the light intensity, and at the same time, the energy of the laser after passing through the head can meet the requirements of rock modification.

[0048] like Figure 3 As shown, when the laser ultrasonic coaxial composite rock crushing device is drilling into the rock surface, the laser is input through the optical isolator 8, and the laser passes through the lens 9 to form a laser beam with a predetermined spot diameter. The spot diameter of the laser beam is generally slightly smaller than the minimum diameter of the laser channel 17. The laser beam is emitted through the laser channel 17 to irradiate the drilling point on the rock surface.

[0049] At the same time, ultrasonic waves are input to the ultrasonic transducer, and the ultrasonic transducer generates a longitudinal simple harmonic vibration and transmits the longitudinal simple harmonic vibration to the spiral groove horn 2. When the longitudinal simple harmonic vibration is transmitted to the spiral groove horn 2 at a section of the spiral groove 27, the vibration force of the simple harmonic vibration is divided into the internal solid cone part and the spiral groove 27 part on the surface. The vibration force on the solid cone part is still longitudinal, but the vibration force on the spiral groove 27 part generates a tangential force under the spiral groove 27. In this way, the spiral groove horn 2 is circumferentially twisted while vibrating longitudinally, thereby driving the drill bit 3 to vibrate longitudinally and twist at the same time, so that the drill bit 3 drills the drilling point irradiated by the laser beam. The laser heats the drilling point to reduce the rock strength, thereby increasing the drilling speed of the drill bit 3.

[0050] The spiral groove amplitude transformer 2 is constrained by the impact head 19 and the first elastic member 21, that is, the torsion radius of the amplitude transformer is constrained; the drill bit 3 is also constrained by the second elastic member 22 and the support tube, that is, the torsion radius of the drill bit 3 is constrained, so that the laser channel 17 of the drill bit 3 remains coaxial with the lens 9 during the drilling process, ensuring that the laser spot output by the optical isolator 8 can accurately irradiate the drilling point.

[0051] In addition, if Figure 7 As shown, in some embodiments, the laser ultrasonic coaxial composite rock crushing device further includes a control system 300, and a laser 100 and an ultrasonic generator 200 connected to the control system 300. The laser 100 is connected to the optical isolator 8, and the laser emitted by the laser 100 is input to the optical isolator 8, and the control system 300 can adjust the laser parameters. The ultrasonic generator 200 is connected to the piezoelectric ceramic stack 11 of the ultrasonic transducer, and the ultrasonic wave output by the ultrasonic generator 200 generates simple harmonic vibration through the ultrasonic transducer, and the control system 300 can adjust the ultrasonic wave parameters.

[0052] In this article, the directional words such as front, back, top, and bottom involved are defined by the positions of the parts in the drawings and the positions of the parts relative to each other, just for the sake of clarity and convenience in expressing the technical solution. It should be understood that they are relative concepts and can change accordingly according to different ways of use and placement, and the use of the directional words should not limit the scope of protection claimed in this application.

[0053] In the absence of conflict, the above embodiments and features in the embodiments may be combined with each other. The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A laser ultrasonic coaxial composite rock crushing device, characterized in that: include: shell; A laser irradiation module is disposed inside the housing, and comprises a coaxially arranged optical isolator and a lens, wherein the lens is disposed below the laser irradiation module; and an ultrasonic drilling module, which is arranged inside the housing, the ultrasonic drilling module comprising an ultrasonic transducer, a spiral groove horn, a first elastic member and a drill bit, wherein the ultrasonic transducer is arranged below the lens, the upper end of the spiral groove horn is connected to the ultrasonic transducer, and the lower end is connected to the drill bit, the first elastic member is fixedly arranged around the drill bit and connected to the lower end of the spiral groove horn, the spiral groove horn is a cone with a diameter gradually decreasing from top to bottom, the outer wall of the spiral groove horn is provided with a plurality of spiral grooves, the spiral groove horn and the drill bit are both hollowly arranged to form a laser channel coaxially arranged with the lens; While the ultrasonic transducer drives the drill bit to drill the drilling point, the laser spot output by the optical isolator irradiates the drilling point via the lens and the laser channel. The laser heats the drilling point to reduce the rock strength, thereby increasing the drilling speed of the drill bit.

2. A laser ultrasonic coaxial composite rock crushing device as claimed in claim 1, characterized in that: The ultrasonic drilling module also includes a cylindrical impact head, the upper end of the drill bit is provided with a cylindrical socket, the lower end of the spiral groove amplitude rod is provided with a plug joint, the plug joint is inserted into the socket, the impact head is fixedly sleeved on the periphery of the socket, and the upper end of the impact head is abutted against the lower end of the spiral groove amplitude rod, and the lower end is connected to the first elastic member.

3. A laser ultrasonic coaxial composite rock crushing device as claimed in claim 2, characterized in that: The ultrasonic drilling module also includes a rotor, which is rotatably disposed in the socket and the upper end of which contacts the plug connector. The rotor is coaxially disposed with the lens and has an inner hole, which is axially penetrated by the rotor and located on the laser channel.

4. A laser ultrasonic coaxial composite rock crushing device as claimed in claim 3, characterized in that: The rotor is a hollow cylinder, the outer diameter of the rotor is the same as the diameter of the plug connector and is smaller than the inner diameter of the socket, and the upper end of the rotor abuts against the plug connector.

5. A laser ultrasonic coaxial composite rock crushing device as claimed in claim 2 or 3, characterized in that: The ultrasonic drilling module also includes a support tube coaxially arranged with the spiral groove amplitude transformer, the support tube includes an upper cylinder, a connecting plate and a lower cylinder connected in sequence, the lower cylinder is rotatably connected to the outer shell, the connecting plate is rotatably supported in the outer shell, the first elastic member is a first spring, the upper end of the first spring is sleeved and fixed to the lower end of the impact head, and the lower end is sleeved and fixed to the upper cylinder.

6. A laser ultrasonic coaxial composite rock crushing device as claimed in claim 5, characterized in that: The ultrasonic drilling module also includes a second elastic member, which is arranged around the drill bit, and the upper end of the second elastic member is connected to the bottom of the socket slot, and the lower end of the second elastic member is connected to the middle of the connecting plate.

7. The laser ultrasonic coaxial composite rock crushing device according to claim 1, characterized in that: The ultrasonic drilling module also includes a hollow screw, the upper end of which is connected to the ultrasonic transducer, and the lower end of which is inserted into the inner hole of the spiral groove amplitude transformer and threadedly connected to the spiral groove amplitude transformer.

8. A laser ultrasonic coaxial composite rock crushing device as claimed in claim 7, characterized in that: The ultrasonic transducer includes a piezoelectric ceramic stack, a pressure cover and a nut. A support plate is provided at the upper end of the spiral groove amplitude rod. The edge of the support plate is fixedly connected to the shell. The support plate is provided with an annular groove. The annular groove is arranged around the spiral groove amplitude rod to reduce the thickness of the connection between the support plate and the spiral groove amplitude rod. The piezoelectric ceramic stack is supported on the support plate. The pressure cover is arranged on the upper part of the piezoelectric ceramic stack. The upper end of the screw rod passes through the support plate, the piezoelectric ceramic stack and the pressure cover, and is tightly connected to the nut.

9. The laser ultrasonic coaxial composite rock crushing device according to claim 1, characterized in that: A sealing head is provided at the front end of the inner hole of the drill bit, and the sealing head is made of a light-transmitting material.

10. The laser ultrasonic coaxial composite rock crushing device according to claim 1, characterized in that: It also includes a control system, and a laser and an ultrasonic generator connected to the control system, wherein the laser is connected to the optical isolator, and the ultrasonic generator is connected to the ultrasonic transducer.

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