Waterjet ice core drilling rig

Abstract

The invention discloses a water jet ice core drilling rig, which belongs to the technical field of ice core collection. The water jet ice core drilling rig comprises a drill barrel and a water jet head, wherein a cut-off block for cutting off the ice core is arranged on the inner side of one end of the drill barrel, and the water jet head comprises an inner tube and an outer tube, wherein the inner tube is coaxially fixedly connected to the drill barrel and located at one end of the drill barrel where the cut-off block is located, wherein a plurality of first water channel openings are arranged on the outer side of one end of the inner tube close to the drill barrel, wherein each first water channel opening is evenly arranged along the circumference of the inner tube, and the first water channel opening is connected to the corresponding drill barrel water channel, and the outer tube is sleeved outside the first water channel opening and coaxially fixedly connected to the inner tube. The water jet ice core drilling rig of the invention is suitable for ice core drilling work in any glacial environment, and the verticality of the borehole is high, and the drill is not easily stuck, thereby solving the problem that the existing screw-in ice core drilling rig is prone to damage of the cutter head and motor stuck and burned in an environment with high moraine content.

Description

Technical Field

[0001] The invention relates to the technical field of ice core collection, and in particular to a water jet type ice core drilling rig. Background Art

[0002] Ice core analysis is an important research area in glacier research. By drilling ice cores from the ice surface to the bottom of the glacier in suitable glacier areas, and analyzing the crystal size, impurity content and properties, chemical isotope content, air composition in bubbles, optical properties, organic and inorganic content of the ice cores layer by layer, we can obtain important information such as the glacier development history, paleoclimate characteristics and evolution sequence, glacier deposition environment and evolution process, and glacier dynamic characteristics. It is an important research method for glaciologists to reveal paleoclimate and atmospheric environment, study glacier evolution and modern glacier dynamic characteristics, and predict future changes in glaciers.

[0003] The screw-in ice core drill is the main mechanical device used by glaciologists to collect ice cores. Due to its simple structure and low failure rate, it is widely used in ice core drilling around the world. However, in long-term practice, the screw-in ice core drill has also exposed some shortcomings, which limit its application environment:

[0004] 1. The existing screw-in ice core drill has a wedge-shaped cutter head with a straight cutting edge, which helps to cut the ice efficiently. However, when the content of internal moraine in the ice is high, the rotating drill barrel drives the cutter head to directly cut the hard moraine particles, which can easily cause faults such as cutting edge cracking, cutter head jamming and motor burning. Therefore, the screw-in ice core drill is difficult to apply to glacial environments with high internal moraine content.

[0005] 2. The ice holes drilled by the screw-in ice core drill are often curved, and even have multiple bends. The uneven boreholes extend the ice core sampling path, increasing the ice core analysis error. At the same time, the curved boreholes increase the chance of the drill getting stuck in the borehole and unable to be pulled out.

[0006] 3. In order to allow the rear of the cutter to have a certain amount of space for movement when it rotates along the shaft, the shaft baffle is installed protrudingly on the outer wall of the drill tube. For this reason, the cutter head needs to be widened outward to prevent the protruding baffle from getting stuck during drilling. However, this convex baffle design may still be one of the reasons for drill jamming, especially when drilling in marine glaciers with high glacier temperatures. The ice body has a strong plasticity and the borehole is prone to deformation, resulting in a reduction in the borehole diameter and the drill rig being stuck in the borehole and unable to be removed. Summary of the invention

[0007] The purpose of the present invention is to overcome the problems in the prior art and to provide a water jet ice core drill suitable for ice core drilling work in any glacial environment, particularly suitable for drilling work in glacial ablation areas with high internal moraine content and other complex glacial environments. The drill hole has high verticality and is not prone to drill jamming, thus solving the problem of cutter head damage and motor jamming and burning in existing screw-in ice core drills in high moraine content environments.

[0008] The water jet ice core drilling rig provided by the present invention comprises:

[0009] A drill barrel, wherein a plurality of drill barrel water channels are arranged in the barrel wall, and the drill barrel water channels are all connected to a high-pressure water source;

[0010] A water jet head comprises an inner tube and an outer tube, wherein the inner tube is coaxially fixedly connected to one end of a drill tube, a plurality of first waterway openings are arranged on the outer side of one end of the inner tube close to the drill tube, and each first waterway opening is evenly arranged along the circumference of the inner tube, and the first waterway openings correspond to the drill tube waterway one by one, and the first waterway openings are communicated with the corresponding drill tube waterway, and the outer tube is sleeved outside the first waterway openings and coaxially fixedly connected to the inner tube, so that an annular water jet nozzle is formed between the outer tube and the inner tube.

[0011] Preferably, an end of the inner tube away from the drill tube is more protruding than an end of the outer tube away from the drill tube.

[0012] Preferably, the end of the inner tube away from the drill tube protrudes 1 mm to 2 mm more than the end of the outer tube away from the drill tube.

[0013] Preferably, the difference between the outer diameter of the tube opening at one end of the inner tube away from the drill barrel and the inner diameter of the tube opening at one end of the outer tube away from the drill barrel is 0.5 mm to 1.5 mm.

[0014] Preferably, an upper cover is fixedly connected to one end of the drill barrel away from the water jet head, an upper cover water channel is provided inside the upper cover, the upper cover water channel is connected with the drill barrel water channel, a high-pressure water pipe interface is also provided on the upper cover, and the high-pressure water source is connected with the upper cover water channel through the high-pressure water pipe interface.

[0015] Preferably, a lifting eye screw is provided on a side of the upper cover away from the drill tube, so as to connect the traction harness through the lifting eye screw.

[0016] Preferably, the high-pressure water pipe interface is arranged at the center position of the side of the upper cover away from the drill barrel, the upper cover water channel includes two, the two upper cover water channels are perpendicular to each other and intersect at the center point of the upper cover, and are connected to the high-pressure water pipe interface, and the drill barrel water channel includes four, and the two ends of the two upper cover water channels are respectively connected to a drill barrel water channel.

[0017] Preferably, the outer wall of the drill tube is smooth and has no protrusions.

[0018] Preferably, the drill barrel water channels are all parallel to the axis of the drill barrel, and the drill barrel water channels are evenly arranged along the circumference of the drill barrel. One end of each drill barrel water channel close to the water cutter head is connected to the corresponding first water channel outlet.

[0019] Preferably, the first waterway opening is a convex waterway opening, and a plurality of second waterway openings are provided at one end of the drill tube close to the first waterway opening, and the second waterway openings are concave waterway openings, and the first waterway openings match the second waterway openings, and the first waterway openings are connected to the drill tube waterway by inserting a second waterway opening.

[0020] Compared with the prior art, the present invention has at least the following advantages:

[0021] The water jet ice core drilling rig of the present invention:

[0022] 1. The high-pressure water jet forms a ring at the bottom of the drill rig to impact and erode the ice body for drilling, solving the problem of existing screw-in ice core drilling rigs being prone to damage to the cutter head and motor jamming and burning in environments with high moraine content. The high-pressure water jet can blow moraine away from the ice to prevent it from accumulating at the bottom of the borehole and hindering drilling; therefore, there are no mechanical cutter head components and electronic components, and the failure rate is low;

[0023] 2. No motor is required for rotational drive, so there is no deviation in drilling direction caused by motor torque. The drill can drill vertically to deep depths under the action of gravity. The verticality of the drill hole is high and it is not easy to get stuck.

[0024] 3. The high-pressure water flow has a strong impact on the ice body, and the drilling speed is much faster than that of the traditional rotary drilling rig, which shortens the field operation time;

[0025] 4. Compared with the traditional screw-in drilling rigs, which have higher requirements on the glacial physical characteristics of the drilling point, the water jet ice core drilling rig can be applied to ice core drilling work in any glacial environment, especially in glacial ablation areas with high internal moraine content and other complex glacial environments;

[0026] 5. The water jet ice core drilling rig has a simple structure, low requirements on material strength and processing technology, is easy to manufacture, has a low failure rate, and is easy to maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall appearance structure of the present invention;

[0028] Figure 2 It is a schematic diagram of the overall explosion structure of the present invention;

[0029] Figure 3 It is a longitudinal cross-sectional structural schematic diagram of the present invention;

[0030] Figure 4It is a schematic diagram of the longitudinally cut bottom enlarged structure of the present invention;

[0031] Figure 5 It is a schematic diagram of the upper cover structure of the present invention;

[0032] Figure 6 It is a schematic diagram of the back structure of the upper cover of the present invention;

[0033] Figure 7 It is a schematic diagram of the front cutaway structure of the upper cover of the present invention;

[0034] Figure 8 It is a schematic diagram of the drill tube structure of the present invention;

[0035] Fig. 9 It is a front structural schematic diagram of the inner tube of the water jet head of the present invention;

[0036] Fig.10 It is a schematic diagram of the back structure of the inner tube of the water jet head of the present invention;

[0037] Fig.11 It is a structural schematic diagram of the outer tube of the present invention;

[0038] Fig.12 It is a schematic diagram of the drilling action of the present invention;

[0039] Fig.13 It is a schematic diagram of the coring action of the present invention.

[0040] Description of reference numerals:

[0041] 1. Upper cover; 2. Drill barrel; 3. Water jet head; 4. Eyebolt; 5. High-pressure water pipe interface; 6. Upper cover water channel; 7. Third water channel outlet; 8. Screw mounting seat; 9. Second water channel outlet; 10. Drill barrel water channel; 11. Cut-off block installation outlet; 12. Axis groove; 13. Rotating shaft; 14. Cut-off block; 15. Baffle; 16. Inner tube; 17. Outer tube; 18. First water channel outlet; 19. External thread; 20. Ice core through hole; 21. Inner tube outlet; 22. Outer tube outlet; 23. Annular water jet nozzle; 24. Glacier; 25. Plunger water pump; 26. Water inlet filter; 27. Ice lake; 28. Winch reel; 29. ​​Traction harness; 30. Traction bracket; 31. Pulley; 32. Ice core. DETAILED DESCRIPTION

[0042] The screw-in ice core drill is the main mechanical device used by glaciologists to collect ice cores. Due to its simple structure and low failure rate, it is widely used in ice core drilling around the world. However, in long-term practice, the screw-in ice core drill has also exposed some shortcomings, which limit its application environment:

[0043] 1. The straight blade edge cannot work properly in glacier areas with high moraine content. Unlike the pure ice formed by freezing of rivers and lakes in winter, the formation of glacier ice mainly comes from the long-term accumulation of snowfall on the upper part of the glacier. Under the action of gravity, the lower snow is directly transformed from snow to ice through glacial actions such as densification and metamorphic recrystallization. In the process of snow deposition and densification, some rock debris, solid impurities in the air, etc. enter the snow with the action of ice avalanches, snowfall, atmospheric dry deposition, etc., and then transform into impurities in the ice with the action of ice formation. In glaciology, these debris and impurities in the ice are called internal moraine, which means moraine in the ice. Therefore, glacier ice is not a pure ice body, but an ice body that generally contains internal moraine impurities. The particle size of internal moraine ranges from microns to meters, but the internal moraine with a size of several millimeters to several centimeters is the most common. The amount of internal moraine in the ice varies greatly at different altitudes, different depths, and between different glaciers. Generally speaking, the content of internal moraine increases gradually from the accumulation zone at the top of the glacier to the ablation zone at the bottom. The average content of internal moraine in polar continental glaciers formed in cold environments is less than that in marine glaciers in warm environments. The average content of internal moraine in valley glaciers is higher than that in flat-topped glaciers or ice caps with open terrain. The cutter head of the rotary ice core drill is designed to be wedge-shaped with a straight blade, which helps to cut the ice efficiently. However, when the content of internal moraine in the ice is high, the rotating drill barrel drives the cutter head to directly cut the hard moraine particles, which can easily cause faults such as blade cracking, cutter head jamming and motor burning. Therefore, the rotary ice core drill is difficult to apply to glacial environments with high internal moraine content.

[0044] 2. The ice holes drilled by the screw-in ice core drill are often curved, and even form multiple bends. The uneven boreholes extend the ice core sampling path, increase the ice core analysis error, and increase the probability that the drill gets stuck in the borehole and cannot be pulled out. Because the motor is subjected to reverse torque in the process of driving the drill barrel and drill bit to rotate, this pair of forward and reverse torques act on the drill bit at the bottom and the motor at the top respectively, making the long drill always tend to tilt to one side, thus causing the borehole to bend. In addition, since the drilling of the screw-in ice core drill in the ice is autonomous, the power of drilling comes from the pressure of the drill bit by the gravity of the drill on the drill on the one hand, and the reaction force obtained by the spiral groove of the drill barrel in the process of pushing ice chips on the other hand. Since the drill is only connected to the outside through flexible bodies such as wire ropes and cables, the operator cannot accurately control the direction of the drill, so the drilling direction is difficult to keep vertically downward and often bends. Since the diameter of the hole drilled by the screw-in ice core drill is the maximum diameter of the cutter head, the curved hole, coupled with the shrinkage of the hole caused by the release of stress in the ice and the deformation of ice crystals, makes it common for the drill to get stuck in the hole, often resulting in the inability to recover the drill and the scrapping of the hole. This problem is particularly prominent when drilling hundreds or thousands of meters deep, resulting in huge losses of scientific research funds.

[0045] 3. In order to allow the rear of the cutter to have a certain amount of space for movement when it rotates along the shaft, the shaft baffle is installed protrudingly on the outer wall of the drill tube. For this reason, the cutter head needs to be widened outward to prevent the protruding baffle from getting stuck during drilling. However, this convex baffle design may still be one of the reasons for drill jamming, especially when drilling in marine glaciers with high glacier temperatures. The ice body has a strong plasticity and the borehole is prone to deformation, resulting in a reduction in the borehole diameter and the drill rig being stuck in the borehole and unable to be removed.

[0046] In order to overcome the above-mentioned shortcomings of the traditional screw-in ice core drilling rig, the present invention abandons the coring idea of ​​mechanical cutting screw-in, and adopts the coring method of water jet impact drilling. It uses high-pressure water flow to form an annular water jet at the drill bit to impact and dissolve the ice body. The small particles of internal moraine are peeled off from the ice body under the action of high-speed water flow and cannot be deposited at the bottom of the borehole to hinder drilling. The drilling rig has no rotating parts and rotational torque, and can form a vertical borehole under the action of gravity. At the same time, the reversed water flow after impacting the bottom of the borehole continues to impact and erode the outer wall of the borehole, so that a borehole with a diameter greater than 10% of the diameter of the drilling rig can be formed, avoiding the occurrence of drill jamming. The water jet ice core drilling rig has the characteristics of simple structure, few parts, and low failure rate. It is very suitable for coring operations in glacial areas with high internal moraine content and complex ice structure.

[0047] The following is combined with Figure 1-13 , 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.

[0048] The water jet ice core drilling machine provided by the present invention comprises a drill barrel 2 and a water jet head 3. The drill barrel 2 is a two-end symmetrical structure. Both end faces are provided with four circumferentially symmetrical screw mounting seats 8 and four second waterway openings 9. The second waterway openings 9 at both ends of the drill barrel 2 are respectively connected to the drill barrel waterway 10. The drill barrel 2 has an ice core through hole 20. The water jet head 3 comprises an inner tube 16 and an outer tube 17. The inner tube 16 is coaxially fixedly connected to one end of the drill barrel 2. The outer side of the inner tube 16 close to the end of the drill barrel 2 is provided with a coaxially arranged annular seat. Four first waterway openings 18 are arranged on the annular seat. Each first waterway opening 18 is evenly arranged along the circumference of the inner tube 16. The first waterway openings 18 correspond to the drill barrel waterway 10 one by one. The first waterway openings 18 are respectively connected to the corresponding drill barrel waterway 10 through a second waterway opening 9 close to the water jet head 3. An external thread 19 is provided on the outer side of the annular seat. The outer tube 17 is sleeved on the annular seat. shaped seat, and is sealed and screwed with the annular seat through an external thread 19, so that an annular water jet nozzle 23 is formed between the outer tube 17 and the inner tube 16, and a truncation block mounting port 11 is respectively opened on the four screw mounting seats 8 on the side of the drill tube 2 close to the water jet head 3, and the truncation block mounting port 11 is opened along the inner wall boss of the drill tube 2. The shaft 13 passes through the truncation block 14, and the two ends of the shaft 13 are rotatably connected in the shaft groove 12, and are limited by the baffle 15. The wedge tip of the truncation block 14 faces the inner side of the drill tube 2 and its inclined surface points to the side of the water jet head 3. When the bottom plane of the truncation block 14 contacts the bottom of the screw mounting seat 8, it can be supported by the screw mounting seat 8. From this position toward the direction of the drilling rig cover 1, the truncation block 14 can rotate freely within a range of 60° along the shaft 13, and a plurality of drill tube waterways 10 are provided in the wall of the drill tube 2, and the drill tube waterways 10 are all connected to the high-pressure water source.

[0049] As a preferred embodiment, the end of the inner tube 16 away from the drill tube 2 is the inner tube opening 21, and the end of the outer tube 17 away from the drill tube 2 is the outer tube opening 22. The inner tube opening 21 is more protruding than the outer tube opening 22, and an annular water jet nozzle 23 is formed between the inner tube opening 21 and the outer tube opening 22.

[0050] As a preferred embodiment, the inner tube opening 21 protrudes 1 mm to 2 mm more than the outer tube opening 22 .

[0051] As a preferred embodiment, the difference between the outer diameter of the inner tube orifice 21 and the inner diameter of the outer tube orifice 22 is 0.5 mm to 1.5 mm, which can ensure the water pressure and the strength of the formed annular water jet, and ensure the drilling stability of the drill tube 2.

[0052] As a preferred manner, one end of the drill barrel 2 away from the water cutter head 3 is fixedly connected to the upper cover 1 through a screw mounting seat 8, and an upper cover water channel 6 is provided in the upper cover 1, and the upper cover water channel 6 is connected to the drill barrel water channel 10. A high-pressure water pipe interface 5 is also provided on the upper cover 1, and the high-pressure water source is connected to the upper cover water channel 6 through the high-pressure water pipe interface 5.

[0053] As a preferred manner, a lifting eye screw 4 is fixedly connected to a side of the upper cover 1 away from the drill tube 2 , so as to connect the traction harness 29 through the lifting eye screw 4 .

[0054] As a preferred embodiment, the high-pressure water pipe interface 5 is arranged at the center position of the side of the upper cover 1 away from the drill barrel 2. The upper cover water channel 6 includes two, the two upper cover water channels 6 are perpendicular to each other and intersect at the center point of the upper cover 1, and are connected with the high-pressure water pipe interface 5. The drill barrel water channel 10 includes four, the second water channel openings 9 are all pit water channel openings, and a third water channel opening 7 is provided at both ends of the two upper cover water channels 6. The third water channel openings 7 are respectively connected with the drill barrel water channel 10 by inserting a second water channel opening 9 close to the upper cover 1. Specifically, in order to enable the drill barrel to accommodate an ice core with a diameter as large as possible, the size of the drill barrel water channel needs to be as small as possible, generally with an inner diameter of 4-6 mm and a wall thickness of 2-2.5 mm for pressure bearing, so as to leave a large enough space. At the same time, the inner diameter of the water pipe interface 5 is generally more than 12 mm. Selecting four drill barrel water channels 10 for simultaneous transportation can smoothly transport these high-pressure water flows and reduce the energy loss or head loss of the water flow.

[0055] As a preferred manner, the outer wall of the drill tube 2 is smooth and has no protrusions, which can reduce the possibility of the drill tube 2 being deflected during the drilling process, and at the same time, can reduce the degree of deflection of the drill tube 2 during the drilling process.

[0056] As a preferred embodiment, the drill barrel water channels 10 are all parallel to the axis of the drill barrel 2, and the drill barrel water channels 10 are evenly arranged along the circumference of the drill barrel 2. The ends of each drill barrel water channel 10 close to the water cutter head 3 are connected to the corresponding first water channel opening 18 through a second water channel opening 9. The four drill barrel water channels 10 are circumferentially symmetrical and evenly stressed, and are easy to process.

[0057] As a preferred embodiment, the first waterway opening 18 is a convex waterway opening, and a plurality of second waterway openings 9 are provided at one end of the drill tube 2 close to the first waterway opening 18, and the second waterway openings 9 are concave waterway openings. The first waterway opening 18 matches the second waterway opening 9, and the first waterway opening 18 is connected to the drill tube waterway 10 by inserting a second waterway opening 9 close to the water cutter head 3. The above technical solution can improve the sealing performance of the connection between the first waterway opening 18 and the second waterway opening 9, and facilitate the connection.

[0058] In the working area of ​​glacier 24, the water inlet of plunger water pump 25 driven by portable engine or electric motor is connected to water inlet filter 26 through low-pressure water pipe, and water is directly taken from glacial water sources such as ice lake, ice river, ice well, etc. or transferred through large-capacity portable container. In this example, water inlet filter 26 is directly put into ice lake 27 to take water; the water outlet of plunger water pump 25 provides high-pressure water flow of >3MPa to access the water inlet of winch hose reel 28, and the water outlet of winch hose reel 28 is connected to The high-pressure water pipe, together with the traction wire rope and the measuring tape, constitutes a traction harness 29; one end of the traction harness 29 is stored on the winch reel 28, and the other end is connected to the water jet drilling rig upper cover 1 through a pulley 31 hoisted on the traction bracket 30, wherein the high-pressure water pipe is connected to the high-pressure water pipe interface 5 of the upper cover 1 to input high-pressure water flow, and the traction harness 29 is connected to the lifting eye screw 4 to provide the main traction force; during drilling, the traction force applied to the drilling rig by the traction harness 29 should be small, and it is only necessary to keep the drilling rig in a vertical state.

[0059] The high-pressure water flow entering the high-pressure water pipe interface 5 passes through the upper cover water channel 6 and the drill tube water channel 10 in turn, enters the cavity between the inner tube 16 and the outer tube 17 at the bottom of the drilling rig, and is ejected at high speed through the annular water jet nozzle 23 to form an annular jet. The high-pressure annular jet is used to form an annular high-pressure water jet at the bottom of the drilling rig, and drilling is performed by impacting and eroding the ice body. Since the inner tube orifice 21 protrudes 1 to 2 mm more than the outer tube orifice 22, when the inner tube orifice 21 is pressed against the ice surface, the annular water jet nozzle 23 between the inner tube orifice 21 and the outer tube orifice 22 will not be blocked by the ice surface and internal moraine impurities, and the water flow can smoothly impact the ice body at the outer edge of the inner tube orifice 21, while the ice body at the inner edge of the inner tube orifice 21 is protected by the tube wall and becomes an ice core 32.

[0060] The ice body is continuously disintegrated under the continuous impact, crushing and dissolution of the high-pressure water flow from the annular water jet nozzle 23. At the same time, the high-speed water flow is turned due to the obstruction of the front ice body, and continues to crush and erode the lateral ice body, thereby continuously expanding the borehole; as the ice body below the annular water jet nozzle 23 is crushed and disintegrated, the drilling rig continuously moves downward under the action of gravity, and the ice core 32 enters the drill barrel 2 through the ice core through hole 20; when the ice core 32 passes through the truncation block 14, the truncation block 14 can be flipped upward around the rotating shaft 13, which will not hinder the passage of the ice core 32.

[0061] When drilling begins, the operator should record the starting number of meters with the tape measure in the traction harness 29. As the drilling rig advances, when the tape measure drops by a number of meters equal to or close to the maximum ice core length that the drill tube can accommodate (the initial calculation should pay attention to the invalid ice core length between the additional cut-off block 14 and the inner tube mouth 21), the plunger pump 25 stops supplying water, and the operator pulls the traction harness 29 with manual or mechanical assistance, and the cut-off block 14 moves upward with the drill tube 2. Its wedge tip pierces the ice core 32 due to inward extrusion to cut it off, and with the support of the screw mounting seat 8, the cut-off block 14 lifts the cut ice core 32 in the drill tube 2, so that the ice core 32 can be pulled out of the borehole together with the drill rig; after the drill rig is taken out, the upper cover 1 can be removed to pour out the ice core 32, and the arrangement numbering and sample processing and collection work can be carried out in the order of head to tail. Repeating the above working sequence can continuously drill and collect ice cores 32 in the deep part of the glacier.

[0062] In the description of the present invention, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0063] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0064] 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 water jet ice core drilling rig, characterized in that: include: A drill tube (2), wherein a plurality of drill tube water channels (10) are arranged in the tube wall, and the drill tube water channels (10) are all connected to a high-pressure water source; A water jet head (3) comprises an inner tube (16) and an outer tube (17), wherein the inner tube (16) is coaxially fixedly connected to one end of a drill tube (2), and a plurality of first waterway openings (18) are arranged on the outer side of one end of the inner tube (16) close to the drill tube (2), wherein each first waterway opening (18) is evenly arranged along the circumference of the inner tube (16), wherein each of the first waterway openings (18) corresponds to a drill tube waterway (10) one by one, and the first waterway openings (18) are connected to the corresponding drill tube waterway (10), and the outer tube (17) is sleeved on the first waterway openings (18). The outer tube (17) is coaxially fixedly connected to the inner tube (16) so that an annular water jet nozzle (23) is formed between the outer tube (17) and the inner tube (16); The end of the inner tube (16) away from the drill tube (2) protrudes more than the end of the outer tube (17) away from the drill tube (2); the end of the inner tube (16) away from the drill tube (2) protrudes 1 mm to 2 mm more than the end of the outer tube (17) away from the drill tube (2); and the difference between the outer diameter of the tube opening at the end of the inner tube (16) away from the drill tube (2) and the outer diameter of the tube opening at the end of the outer tube (17) away from the drill tube (2) is 0.5 mm to 1.5 mm.

2. The water jet ice core drilling rig according to claim 1, characterized in that: The outer wall of the drill tube (2) is smooth and has no protrusions.

3. The water jet ice core drilling rig according to claim 1, characterized in that: The drill tube water channels (10) are all parallel to the axis of the drill tube (2), and the drill tube water channels (10) are evenly arranged along the circumference of the drill tube (2). One end of each drill tube water channel (10) close to the water cutter head (3) is connected to the corresponding first water channel opening (18).

4. The water jet ice core drilling rig according to claim 1, characterized in that: The first waterway opening (18) is a convex waterway opening, and a plurality of second waterway openings (9) are provided at one end of the drill tube (2) close to the first waterway opening (18), wherein the second waterway openings (9) are concave waterway openings, and the first waterway opening (18) matches the second waterway openings (9), and the first waterway openings (18) are connected to the drill tube waterway (10) by inserting a second waterway opening (9).

5. The water jet ice core drilling rig according to claim 1, characterized in that: An upper cover (1) is fixedly connected to one end of the drill tube (2) away from the water jet head (3); an upper cover water channel (6) is provided in the upper cover (1); the upper cover water channel (6) is communicated with the drill tube water channel (10); a high-pressure water pipe interface (5) is also provided on the upper cover (1); the high-pressure water source is communicated with the upper cover water channel (6) via the high-pressure water pipe interface (5).

6. The water jet ice core drilling rig according to claim 5, characterized in that: A lifting eye screw (4) is provided on one side of the upper cover (1) away from the drill tube (2) so as to connect the traction harness (29) via the lifting eye screw (4).

7. The water jet ice core drilling machine according to claim 5, characterized in that: The high-pressure water pipe interface (5) is arranged at the center position of a side of the upper cover (1) away from the drill tube (2); the upper cover water channel (6) comprises two, the two upper cover water channels (6) are perpendicular to each other and intersect at the center point of the upper cover (1), and are connected to the high-pressure water pipe interface (5); the drill tube water channels (10) comprise four, and the two ends of the two upper cover water channels (6) are respectively connected to a drill tube water channel (10).

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