Rock breaking and coring equipment for geotechnical engineering investigation

Abstract

The invention discloses rock crushing and coring equipment for geotechnical engineering investigation, and belongs to the technical field of drilling equipment. The rock crushing and coring equipment for geotechnical engineering investigation comprises a drilling tool, a sampling barrel and a high-pressure water supply device, and further comprises a triggering part, a coring part and a control part, and the triggering part is arranged at the end, away from a drill bit of the drilling tool, of the sampling barrel; a first sliding groove is formed in the water flow reversing part, the high-pressure water supply device communicates with a water outlet in the drill bit through the water flow reversing part, the water flow reversing part communicates with the first sliding groove, and the water flow reversing part is used for communicating the high-pressure water supply device with the first sliding groove when the triggering part is triggered; one end of the sliding sleeve is hermetically and slidably connected into the first sliding groove; the cut-off part is connected with the other end of the sliding sleeve, and when high-pressure water is introduced into the first sliding groove, the sliding sleeve drives the cut-off part to move into the sampling barrel. According to the rock crushing and coring equipment for geotechnical engineering investigation, the drill bit can be cooled by using high-pressure water, the abrasion of the drill bit is reduced, and a rock core is cut off by using the high-pressure water as power, so that the integrity of the obtained rock core can be ensured.

Description

Technical Field

[0001] The invention relates to the technical field of drilling equipment, and in particular to a rock-crushing coring equipment for geotechnical engineering survey. Background Art

[0002] In the process of geotechnical engineering investigation, in order to determine the various physical and chemical properties of rocks and study the underground structure and rock deposition environment, it is necessary to coring the rocks to be investigated, and rock coring equipment is needed when coring. The integrity of the core has an important impact on the accuracy of the research results. Therefore, when coring rocks, the integrity of the core needs to be ensured as much as possible.

[0003] The core components of the existing rock coring equipment include a drill, a sampling barrel and a high-pressure water supply device. The drill bit of the drill is provided with a sampling hole and a water outlet. The sampling barrel is provided in the drill and connected to the sampling port. The water supply device is connected to the water outlet. When in use, the drill is driven to rotate, and as the drill bit breaks the rock around the sampling hole, the core facing the sampling port enters the sampling barrel for core sampling. The water supply device sprays cooling water through the water outlet to cool the drill.

[0004] In the existing rock coring equipment, during the process of crushing rock and coring, it is difficult to cut the core in time after the obtained core enters the sampling tube. Therefore, the core entering the sampling tube will be continuously squeezed as the coring equipment continues to drill, resulting in the core being broken, making it difficult to ensure the integrity of the core finally obtained. Summary of the invention

[0005] The purpose of the present invention is to overcome the problems in the prior art and provide a rock crushing and coring device for geotechnical engineering investigation. In the process of rock crushing and coring, high-pressure water can be used to cool the drill bit to reduce the wear of the drill bit, and when the core fills the sampling tube, the power of the high-pressure water can be used to cut off the core in time to avoid the core in the sampling tube from being crushed due to squeezing, thereby ensuring the integrity of the obtained core.

[0006] The present invention provides a rock crushing coring device for geotechnical engineering investigation, comprising a drilling tool, a sampling tube and a high-pressure water supply device, and also comprising:

[0007] A trigger part is arranged at an end of the sampling tube away from the drill bit of the drilling tool;

[0008] A water flow reversing part is connected to the trigger part, a first chute is provided on the water flow reversing part, and the first chute is arranged along the axial direction of the sampling tube. The high-pressure water supply device is connected to the water outlet on the drill bit through the water flow reversing part, and the water flow reversing part is connected to the first chute. The water flow reversing part is used to connect the high-pressure water supply device with the first chute when the trigger part is triggered;

[0009] A sliding sleeve, one end of which is sealingly and slidingly connected in the first sliding groove;

[0010] The cut-off part is arranged on the side wall of one end of the sampling tube close to the drill bit, and the cut-off part is connected to the other end of the sliding sleeve. When high-pressure water flows into the first sliding groove, the sliding sleeve drives the cut-off part to move into the sampling tube.

[0011] Preferably, the water flow reversing part includes a trigger part and a slide seat, the liquid inlet of the reversing valve is connected to the high-pressure water supply device, the slide seat is arranged between the sampling tube and the inner wall of the drill bit, and the slide seat is provided with a first through hole and a second through hole, one end of the first through hole is connected to the liquid outlet A of the reversing valve, the other end of the first through hole is connected to the water outlet on the drill bit, the second through hole is connected to the liquid outlet B of the reversing valve, and the slide seat is provided with a first slide groove along the axial direction of the sampling tube near one end of the drill bit, and the first slide groove is connected to the second through hole near one end of the drill bit.

[0012] Preferably, the reversing valve includes a valve seat and a valve core, the valve seat is connected to the end of the sampling tube away from the drill bit, the valve seat is provided with a first sliding hole along the axial direction of the sampling tube, the trigger part is slidably connected to the first sliding hole, one end of the trigger part protrudes from the valve seat, the other end of the trigger part is connected to the valve core, the valve core is connected to the valve seat, a third through hole and a fourth through hole are provided on the valve core, the high-pressure water supply device is connected to the third through hole and one end of the fourth through hole, under normal circumstances, the other end of the third through hole is connected to the first through hole and the other end of the fourth through hole is sealed by the valve seat, when the trigger part is squeezed, the other end of the third through hole is sealed by the valve seat and the other end of the fourth through hole is connected to the second through hole.

[0013] Preferably, the trigger part includes a valve stem and a first slider, the valve stem is slidably connected to the first sliding hole, one end of the valve stem protrudes from the valve seat, and the other end of the valve stem is connected to the first slider, the inner wall of the first sliding hole is provided with a spiral cam groove, and the second slider is slidably connected in the spiral cam groove, the second slider is connected to the side wall of the valve stem, the valve core shaft is pivotally connected to the drilling tool, the valve core is provided with a second sliding groove along the axial direction of the sampling tube, the first slider is slidably connected in the second sliding groove, and when the valve stem is squeezed, the first slider drives the valve core to rotate to the third through hole close to the drill bit end and is sealed by the valve seat and the fourth through hole close to the drill bit end is connected to the second through hole.

[0014] Preferably, a first spring is disposed in the first sliding hole, and the first spring abuts against the valve stem. Under the action of the elastic force of the first spring, one end of the valve stem close to the drill bit protrudes from the valve seat and extends into the sampling tube.

[0015] Preferably, the cutting part includes a plurality of squeezing mechanisms, which are evenly distributed along the circumference of the sampling barrel and the side wall of the sampling barrel near one end of the drill bit, each squeezing mechanism includes a cutting knife and a wedge block, the side wall of the sampling barrel is provided with a second sliding hole along the radial direction of the sampling barrel, the cutting knife is slidably connected to the second sliding hole, the cutting knife is provided with a blade on the side of the sampling barrel axis near the sampling barrel, the wedge block is connected to the side of the cutting knife away from the sampling barrel axis, the sliding sleeve is provided with a wedge surface near one end of the drill bit, a second spring is provided in the second sliding hole, the second spring abuts against the cutting knife, under the action of the elastic force of the second spring, the wedge block abuts against the wedge surface, and the cutting knife sinks into the second sliding hole under normal conditions, and when the sliding sleeve moves toward one end of the drill bit, the sliding sleeve drives the wedge block and the cutting knife to move toward one side of the sampling barrel axis through the wedge surface.

[0016] Preferably, the end of the sliding sleeve away from the drill bit is connected to a third sliding block, and the third sliding block is sealingly slidably connected in the first sliding groove.

[0017] Preferably, a plug is provided at one end of the sampling tube close to the drill bit, and the plug is slidably connected in the sampling tube, and the plug can abut against the valve stem.

[0018] Preferably, an arc-shaped slide groove is provided at one end of the valve core close to the valve seat, and a sealing ring is provided in the arc-shaped slide groove, and the sealing ring is used to seal between the valve core and the valve seat.

[0019] Preferably, the valve seat is detachably connected to an end of the sampling tube away from the drill bit.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows: the rock crushing and coring equipment for geotechnical engineering survey of the present invention can use high-pressure water to cool the drill bit and reduce the wear of the drill bit during the rock crushing and coring process, and when the core fills the sampling tube, the core is cut off by using the high-pressure water as power, thereby ensuring the integrity of the obtained core.

[0021] The reversing valve of the device can trigger the reversing by using the extrusion force of the core after the core is filled into the sampling tube, so as to ensure that the length of the core is accurately controlled each time the core is taken, thereby further ensuring the integrity of the core. The triggering part of the reversing valve, the valve stem drives the first slider to slide in the second slide groove in the valve core, while driving the valve core to rotate, so as to drive the reversing valve to change direction, so that the high-pressure water can drive the cut-off part to cut the core. By setting the first spring, the first spring drives the valve stem to protrude from the valve seat near one end of the drill bit and extend into the sampling tube, so as to prevent the valve core from rotating during the drilling process of the drill bit, thereby ensuring the stable connection between the third through hole and the first through hole, thereby improving the continuity of high-pressure water cooling the drill bit. The cut-off part of the device, the cut-off knives of the multiple extrusion mechanisms apply shear force along the radial direction of the core to the core through the blade, which can improve the neatness of the cut-off part of the core, thereby further ensuring the integrity of the core. By providing the third slider, the sealing between the third slider and the side wall of the first slide groove can be improved, and the power applied by high-pressure water to the third slider can be increased, thereby increasing the shear force applied by the cutoff mechanism to the core. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the first state of the present invention;

[0023] Figure 2 It is a structural schematic diagram of the AA surface of the present invention;

[0024] Figure 3 It is a structural schematic diagram of the second state of the present invention;

[0025] Figure 4 It is a structural schematic diagram of the BB surface of the present invention;

[0026] Figure 5 It is a structural schematic diagram of the truncation portion of the present invention.

[0027] Description of reference numerals:

[0028] 101. trigger part, 102. drilling tool, 103. sampling tube, 104. reversing valve, 105. sliding seat, 106. first through hole, 107. second through hole, 108. first slide groove, 109. drill bit, 110. sliding sleeve, 111. cut-off part, 112. water outlet, 201. valve seat, 202. valve core, 203. first slide hole, 204. fourth through hole, 205. third through hole, 301. valve stem, 302. first slider, 303. spiral cam groove, 304. second slider, 305. second slide groove, 4. first spring, 501. cut-off knife, 502. wedge block, 503. second slide hole, 504. second spring, 6. third slider, 7. plug block, 801. arc slide groove, 802. sealing ring. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-5 , the specific implementation of the present invention is described in detail, but it should be understood that the protection scope of the present invention is not limited by the specific implementation. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0030] like Figure 1-5 As shown, the rock coring equipment for geotechnical engineering investigation and crushing provided by the present invention includes a drilling tool 102, a sampling tube 103 and a high-pressure water supply device, and also includes: a triggering part 101, a water flow reversing part, a sliding sleeve 110 and a truncation part 111. The triggering part 101 is arranged at one end of the sampling tube 103 away from the drill bit 109 of the drilling tool 102; the water flow reversing part is connected to the triggering part 101, and a first chute 108 is arranged on the water flow reversing part, and the first chute 108 is arranged along the axial direction of the sampling tube 103, and the high-pressure water supply device is connected to the drill bit through the water flow reversing part. The water outlet 112 on 109 is connected, and the water flow reversing part is connected to the first slide groove 108. The water flow reversing part is used to connect the high-pressure water supply device with the first slide groove 108 when the trigger part 101 is triggered; one end of the sleeve 110 is sealed and slidably connected in the first slide groove 108; the cut-off part 111 is arranged on the side wall of one end of the sampling tube 103 close to the drill bit 109, and the cut-off part 111 is connected to the other end of the sleeve 110. When high-pressure water flows into the first slide groove 108, the sleeve 110 drives the cut-off part 111 to move into the sampling tube 103.

[0031] The working principle of the above embodiment is briefly described:

[0032] When the device is in use, the drill tool 102 is clamped at the output end of the drill rig, and the drill bit 109 of the drill tool 102 is aimed at the rock to be cored. The drill rig is turned on, and the drill rig drives the drill tool 102 to rotate, and the drill bit 109 drills into the rock formation. As the drill bit 109 drills, the core located at the center of the drill bit 109 passes through the center hole of the drill bit 109 and enters the sampling tube 103, and the rock outside the core is broken by the drill bit 109. In this process, the high-pressure water supply device supplies high-pressure water to the water outlet 112 through the water flow reversing part, and the high-pressure water is sprayed from the water outlet 112 to cool the drill bit 109, reduce the temperature of the drill bit 109, and increase the life of the drill bit 109. As the drill bit 109 drills, the core moves into the sampling tube 103 until the core abuts against the trigger part 101 at the end of the sampling tube 103 away from the drill bit 109. The core extrusion trigger part 101 and the reversing valve 104 are triggered, and the high-pressure water supply device supplies high-pressure water to the first slide groove 108 through the water flow reversing part to drive the sleeve 110 to move toward the drill bit 109. The sleeve 110 squeezes the cut-off part 111, thereby driving the cut-off part 111 to move into the sampling tube 103, thereby cutting off the core in the sampling tube 103. At this time, the drilling tool 102 is pulled out to obtain a complete core.

[0033] The geotechnical engineering survey rock crushing and coring equipment of the present invention can use high-pressure water to cool the drill bit 109 during the rock crushing and coring process to reduce the wear of the drill bit 109, and when the core fills the sampling tube 103, the core is cut off by using the high-pressure water as power, thereby ensuring the integrity of the obtained core.

[0034] On the basis of the above embodiments, in order to further ensure the timeliness of the cutting part cutting the core, the integrity of the core is further ensured.

[0035] like Figure 1 As shown, the water flow reversing part includes a trigger part 101 and a slide 105, the liquid inlet of the reversing valve 104 is connected to the high-pressure water supply device, the slide 105 is arranged between the sampling tube 103 and the inner wall of the drilling tool 102, and the slide 105 is provided with a first through hole 106 and a second through hole 107, one end of the first through hole 106 is connected to the liquid outlet A of the reversing valve 104, the other end of the first through hole 106 is connected to the water outlet 112 on the drill bit 109, the second through hole 107 is connected to the liquid outlet B of the reversing valve 104, and the end of the slide 105 close to the drill bit 109 is provided with a first slide groove 108 along the axial direction of the sampling tube 103, and the end of the first slide groove 108 close to the drill bit 109 is connected to the second through hole 107.

[0036] As the drill bit 109 drills, the core located at the center of the drill bit 109 passes through the center hole of the drill bit 109 and enters the sampling tube 103, and the rock outside the core is broken by the drill bit 109. In this process, the reversing valve 104 is in the normal position, and the high-pressure water supply device passes high-pressure water into the first through hole 106 of the slide seat 105 through the liquid outlet A of the reversing valve 104. After passing through the first through hole 106, the high-pressure water enters the water outlet 112 in the drill bit 109, and then sprays out through the water outlet 112 to cool the drill bit 109. As the drill bit 109 drills, the core moves into the sampling tube 103 until the core abuts against the triggering part 101 at the end of the sampling tube 103 away from the drill bit 109. The core extrusion trigger part 101 and the reversing valve 104 are triggered, and the high-pressure water supply device supplies high-pressure water to the second through hole 107 through the liquid outlet B of the reversing valve 104. The high-pressure water in the second through hole 107 enters the first slide groove 108, thereby driving the sleeve 110 to move toward the drill bit 109. The sleeve 110 squeezes the cut-off part 111, thereby being able to timely drive the cut-off part 111 to move into the sampling tube 103 to cut off the core in the sampling tube 103, which can further ensure the timeliness of the cut-off part cutting off the core, thereby further ensuring the integrity of the core.

[0037] On the basis of the above embodiments, in order to ensure that the length of the core is accurately controlled each time the core is taken, the integrity of the core is further ensured.

[0038] like Figure 1-4 As shown, the reversing valve 104 includes a valve seat 201 and a valve core 202. The valve seat 201 is connected to the end of the sampling tube 103 away from the drill bit 109. The valve seat 201 is provided with a first sliding hole 203 along the axial direction of the sampling tube 103. The trigger part 101 is slidably connected to the first sliding hole 203. One end of the trigger part 101 protrudes from the valve seat 201, and the other end of the trigger part 101 is connected to the valve core 202. The valve core 202 is connected to the valve seat 20 1, a third through hole 205 and a fourth through hole 204 are provided on the valve core 202, the high-pressure water supply device is communicated with one end of the third through hole 205 and the fourth through hole 204, the other end of the third through hole 205 is communicated with the first through hole 106 under normal conditions, and the other end of the fourth through hole 204 is sealed by the valve seat 201, and when the triggering part 101 is squeezed, the other end of the third through hole 205 is sealed by the valve seat 201, and the other end of the fourth through hole 204 is communicated with the second through hole 107.

[0039] Under normal conditions, the third through hole 205 of the valve core 202 is connected to the first through hole 106 of the valve seat 201 and the fourth through hole 204 of the valve core 202 is sealed by the valve seat 201. At this time, the water supply device passes high-pressure water into the first through hole 106 of the valve seat 201 through the third through hole 205, thereby cooling the drill bit 109. When the core enters the sampling tube 103, the core squeezes the trigger part 101 of the reversing valve 104. When the trigger part 101 of the reversing valve 104 is squeezed by the core, the third through hole 205 is sealed by the valve seat 201 and the fourth through hole 204 of the valve core 202 is connected to the second through hole 107 of the valve seat 201. The water supply device passes high-pressure water into the second through hole 107 of the valve seat 201 through the fourth through hole 204. The high-pressure water drives the sliding sleeve 110 to move, thereby driving the cut-off part 111 to cut off the core. The reversing valve 104 of the device can trigger the reversing by the squeezing force of the core after the core is filled into the sampling tube 103, so as to ensure that the length of the core is accurately controlled each time the core is taken, thereby further ensuring the integrity of the core.

[0040] As a preferred solution, Figure 1-4As shown, the trigger part 101 includes a valve stem 301 and a first slider 302, the valve stem 301 is slidably connected to the first sliding hole 203, one end of the valve stem 301 protrudes from the valve seat 201, and the other end of the valve stem 301 is connected to the first slider 302, the inner wall of the first sliding hole 203 is provided with a spiral cam groove 303, and the second slider 304 is slidably connected in the spiral cam groove 303, and the second slider 304 is connected to the side wall of the valve stem 301, the valve core 202 is pivotally connected to the drilling tool 102, the valve core 202 is provided with a second sliding groove 305 along the axial direction of the sampling tube 103, and the first slider 302 is slidably connected to the second sliding groove 305. When the valve stem 301 is squeezed, the first slider 302 drives the valve core 202 to rotate until the end of the third through hole 205 close to the drill bit 109 is sealed by the valve seat 201 and the end of the fourth through hole 204 close to the drill bit 109 is connected to the second through hole 107. When the core completely enters the sampling tube 103, the core squeezes the valve stem 301, thereby driving the valve stem 301 to move toward the side of the valve core 202, and the valve stem 301 drives the second slider 304 to move in the spiral cam groove 303. Under the action of the spiral cam groove 303, the valve stem 301 rotates, and the valve stem 301 drives the first slider 302 to slide in the second slide groove 305 in the valve core 202, while driving the valve core 202 to rotate, and the reversing valve 104 is reversed, thereby driving the valve core 202 to rotate until the end of the third through hole 205 close to the drill bit 109 is sealed by the valve seat 201 and the end of the fourth through hole 204 close to the drill bit 109 is connected to the second through hole 107, so that the high-pressure water can drive the cut-off part 111 to cut off the core.

[0041] As a preferred solution, Figure 1-3 As shown, a first spring 4 is provided in the first sliding hole 203, and the first spring 4 abuts against the valve stem 301. Under the elastic force of the first spring 4, the end of the valve stem 301 close to the drill bit 109 protrudes from the valve seat 201 and extends into the sampling tube 103. By providing the first spring 4, under normal conditions, the elastic force applied by the first spring 4 to the valve stem 301 drives the end of the valve stem 301 close to the drill bit 109 to protrude from the valve seat 201 and extend into the sampling tube 103, thereby preventing the valve core 202 from rotating during the drilling process of the drill bit 109, thereby ensuring that the third through hole 205 is stably connected to the first through hole 106 and the other end of the fourth through hole 204 is stably sealed by the valve seat 201, thereby improving the continuity of high-pressure water cooling the drill bit 109.

[0042] As a preferred solution, Figure 1-3As shown in Figure 5, the cutting portion 111 includes a plurality of extrusion mechanisms, which are evenly distributed along the circumference of the sampling tube 103 and the side wall of the sampling tube 103 close to the drill bit 109, each of which includes a cutting knife 501 and a wedge block 502, and the side wall of the sampling tube 103 is provided with a second sliding hole 503 along the radial direction of the sampling tube 103, and the cutting knife 501 is slidably connected in the second sliding hole 503, and the cutting knife 501 is provided with a blade on one side close to the axis of the sampling tube 103, and the wedge block 502 is connected to the cutting knife 5 01 is away from the axis of the sampling barrel 103, the sliding sleeve 110 is provided with a wedge surface at one end close to the drill bit 109, a second spring 504 is provided in the second sliding hole 503, the second spring 504 abuts against the cutter 501, under the action of the elastic force of the second spring 504, the wedge block 502 abuts against the wedge surface, and the cutter 501 sinks into the second sliding hole 503 under normal conditions. When the sliding sleeve 110 moves toward one end of the drill bit 109, the sliding sleeve 110 drives the wedge block 502 and the cutter 501 to move toward the axis of the sampling barrel 103 through the wedge surface. Under normal conditions, under the action of the elastic force of the second spring 504, the cutter 501 sinks into the second sliding hole 503, which can prevent the cutter 501 from obstructing the core from entering the sampling barrel 103. When the high-pressure water drives the sleeve 110 to move toward the drill bit 109, the sleeve 110 drives the wedge block 502 and the cutter 501 to move toward the axis of the sampling tube 103 through the wedge surface, and the cutter 501 drives the blade to apply extrusion force to the core. The cutter 501 with multiple extrusion mechanisms applies shear force along the radial direction of the core to the core through the blade, which can improve the neatness of the cut part of the core, thereby further ensuring the integrity of the core.

[0043] As a preferred solution, Figure 1-4 As shown, the end of the sliding sleeve 110 away from the drill bit 109 is connected to the third slider 6, and the third slider 6 is sealingly slidably connected in the first slide groove 108. A sealed cavity is formed between the third slider 6 and the side wall of the first slide groove 108. When high-pressure water enters the first slide groove 108, it enters the sealed cavity, thereby pushing the third slider 6 to move toward the end of the drill bit 109, thereby driving the sliding sleeve 110 to move toward the end of the drill bit 109. By providing the third slider 6, the sealing between the third slider 6 and the side wall of the first slide groove 108 can be improved, and the power applied by the high-pressure water to the third slider 6 can be improved, thereby increasing the shear force applied by the cutoff mechanism to the core.

[0044] As a preferred solution, Figure 1-3 As shown, a plug 7 is provided at one end of the sampling barrel 103 near the drill bit 109, and the plug 7 is slidably connected in the sampling barrel 103, and the plug 7 can abut against the valve stem 301. By providing the plug 7, foreign matter can be prevented from entering the sampling barrel 103 before sampling, thereby ensuring the purity of the sampled core.

[0045] As a preferred solution, Figure 1-3 As shown, the valve core 202 is provided with an arc-shaped slide groove 801 at one end close to the valve seat 201, and a sealing ring 802 is provided in the arc-shaped slide groove 801, and the sealing ring 802 is used to seal between the valve core 202 and the valve seat 201. By providing the sealing ring 802, the sealing tightness between the valve core 202 and the valve seat 201 can be improved, thereby ensuring the normal operation of the entire device.

[0046] As a preferred solution, Figure 1-3 As shown, the valve seat 201 is detachably connected to the end of the sampling barrel 103 away from the drill bit 109. By setting the valve seat 201 to be detachably connected to the sampling barrel 103, the disassembly and installation of the sampling barrel 103 can be facilitated, thereby facilitating the removal of the core from the sampling barrel 103.

[0047] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A rock coring device for geotechnical engineering investigation, comprising a drilling tool (102), a sampling tube (103) and a high-pressure water supply device, characterized in that: Also includes: A trigger portion (101) is disposed at an end of the sampling tube (103) away from the drill bit (109) of the drilling tool (102); A water flow reversing portion is connected to the trigger portion (101), a first chute (108) is provided on the water flow reversing portion, the first chute (108) is arranged along the axial direction of the sampling tube (103), the high-pressure water supply device is connected to the water outlet (112) on the drill bit (109) through the water flow reversing portion, the water flow reversing portion is connected to the first chute (108), and the water flow reversing portion is used to connect the high-pressure water supply device with the first chute (108) when the trigger portion (101) is triggered; A sliding sleeve (110), one end of which is sealingly and slidingly connected in the first sliding groove (108); The cut-off portion (111) is arranged on the side wall of one end of the sampling tube (103) close to the drill bit (109), and the cut-off portion (111) is connected to the other end of the sliding sleeve (110). When high-pressure water flows into the first sliding groove (108), the sliding sleeve (110) drives the cut-off portion (111) to move into the sampling tube (103).

2. The rock crushing and coring equipment for geotechnical engineering investigation as claimed in claim 1, characterized in that: The water flow reversing part comprises a trigger part (101) and a slide seat (105); the liquid inlet of the reversing valve (104) is connected to the high-pressure water supply device; the slide seat (105) is arranged between the sampling tube (103) and the inner wall of the drilling tool (102); a first through hole (106) and a second through hole (107) are arranged on the slide seat (105); one end of the first through hole (106) is connected to the liquid outlet A of the reversing valve (104); the other end of the first through hole (106) is connected to the water outlet (112) on the drill bit (109); the second through hole (107) is connected to the liquid outlet B of the reversing valve (104); a first sliding groove (108) along the axial direction of the sampling tube (103) is arranged at one end of the slide seat (105) close to the drill bit (109); and the first sliding groove (108) is connected to the second through hole (107) at one end close to the drill bit (109).

3. The rock crushing and coring equipment for geotechnical engineering investigation as claimed in claim 2, characterized in that: The reversing valve (104) comprises a valve seat (201) and a valve core (202); the valve seat (201) is provided with a first sliding hole (203) along the axial direction of the sampling tube (103); the triggering part (101) is slidably connected to the first sliding hole (203); the triggering part (101) is connected to the valve core (202); the valve core (202) is connected to the valve seat (201); and the valve core (202) is provided with a third through hole (205) and a fourth through hole (204), the high-pressure water supply device is connected to the third through hole (205) and one end of the fourth through hole (204), the other end of the third through hole (205) is connected to the first through hole (106) and the other end of the fourth through hole (204) is sealed by the valve seat (201), when the trigger part (101) is squeezed, the other end of the third through hole (205) is sealed by the valve seat (201) and the other end of the fourth through hole (204) is connected to the second through hole (107).

4. The rock crushing and coring equipment for geotechnical engineering investigation as claimed in claim 3, characterized in that: The triggering part (101) comprises a valve stem (301) and a first slider (302), wherein the valve stem (301) is slidably connected to the first sliding hole (203), the valve stem (301) is connected to the first slider (302), the inner wall of the first sliding hole (203) is provided with a spiral cam groove (303), the spiral cam groove (303) is slidably connected to a second slider (304), the second slider (304) is connected to the side wall of the valve stem (301), and the valve core (202) is connected to the valve stem (301). ) is pivotally connected to the drilling tool (102), the valve core (202) is provided with a second slide groove (305), the first slider (302) is slidably connected to the second slide groove (305), when the valve stem (301) is squeezed, the first slider (302) drives the valve core (202) to rotate until the end of the third through hole (205) close to the drill bit (109) is sealed by the valve seat (201) and the end of the fourth through hole (204) close to the drill bit (109) is connected to the second through hole (107).

5. The rock crushing and coring equipment for geotechnical engineering investigation as claimed in claim 4, characterized in that: A first spring (4) is arranged in the first sliding hole (203), and the first spring (4) abuts against the valve stem (301). Under the action of the elastic force of the first spring (4), one end of the valve stem (301) close to the drill bit (109) protrudes from the valve seat (201) and extends into the sampling tube (103).

6. The rock crushing and coring equipment for geotechnical engineering investigation as claimed in claim 1, characterized in that: The cutting portion (111) comprises a plurality of extrusion mechanisms, which are evenly distributed along the circumference of the sampling tube (103) and the side wall of the sampling tube (103) close to the drill bit (109), each of which comprises a cutting knife (501) and a wedge block (502), the side wall of the sampling tube (103) is provided with a second sliding hole (503) along the radial direction of the sampling tube (103), the cutting knife (501) is slidably connected in the second sliding hole (503), the cutting knife (501) is provided with a blade on one side close to the axis of the sampling tube (103), the wedge block (502) is connected to the cutting knife (501) away from the sampling tube (103) and the cutting knife (501) is provided with a blade. On one side of the axis of the tube (103), the sliding sleeve (110) is provided with a wedge surface at one end close to the drill bit (109), and a second spring (504) is provided in the second sliding hole (503). The second spring (504) abuts against the cutting knife (501). Under the action of the elastic force of the second spring (504), the wedge block (502) abuts against the wedge surface. Under normal conditions, the cutting knife (501) sinks into the second sliding hole (503). When the sliding sleeve (110) moves toward one end of the drill bit (109), the sliding sleeve (110) drives the wedge block (502) and the cutting knife (501) to move toward one side of the axis of the sampling tube (103) through the wedge surface.

7. The rock crushing and coring equipment for geotechnical engineering investigation as claimed in claim 1, characterized in that: One end of the sliding sleeve (110) away from the drill bit (109) is connected to a third sliding block (6), and the third sliding block (6) is sealingly slidably connected in the first sliding groove (108).

8. The rock crushing and coring equipment for geotechnical engineering investigation as claimed in claim 1, characterized in that: A plug (7) is provided at one end of the sampling tube (103) close to the drill bit (109). The plug (7) is slidably connected in the sampling tube (103). The plug (7) can abut against the valve stem (301).

9. The rock crushing and coring equipment for geotechnical engineering investigation as claimed in claim 3, characterized in that: An arc-shaped slide groove (801) is provided at one end of the valve core (202) close to the valve seat (201), and a sealing ring (802) is provided in the arc-shaped slide groove (801). The sealing ring (802) is used to seal between the valve core (202) and the valve seat (201).

10. The rock crushing and coring equipment for geotechnical engineering investigation as claimed in claim 3, characterized in that: The valve seat (201) is detachably connected to an end of the sampling tube (103) away from the drill bit (109).

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