Diamond drill bit that is easy to disassemble and replace

Abstract

The present invention relates to the technical field of diamond drill bit connection, and in particular to a diamond drill bit that is easy to disassemble and replace, comprising a cutter head body, a threaded column, a liquid inlet spiral channel, a liquid outlet spiral channel, a connecting column, a rotating main rod, a sleeve rod, a liquid inlet channel, a liquid outlet channel, a water inlet hole, a water outlet hole, a first connecting mechanism and a second connecting mechanism. The first connecting mechanism and the second connecting mechanism both comprise a large-diameter connector and a small-diameter connector. When the cutter head body is connected to the connecting column, the large-diameter connector is used to connect the liquid inlet channel with the liquid inlet spiral channel, and the small-diameter connector is used to connect the liquid outlet channel with the liquid outlet spiral channel. The device can realize rapid assembly of the cutter head body and can water-cool the cutter head body when drilling, thereby ensuring that the equipment can work stably for a long time.

Description

Technical Field

[0001] The invention relates to the technical field of diamond drill bit connection, in particular to a diamond drill bit which is easy to disassemble and replace. Background Art

[0002] As the demand for infrastructure construction in my country continues to increase, geological surveys are becoming more and more important. Geotechnical engineering geological surveys are the premise of construction and design, and are an important means of investigating and studying the engineering geology of the construction area. Geological surveys can correctly reflect the engineering geological conditions of the site, combine the design and on-site construction conditions, conduct technical evaluations of different survey stages, and provide guidance for the construction of infrastructure, mines, slopes and other projects, serving the entire process of engineering construction. At present, the use of deep drilling machinery and technology to obtain underground specimens and stratigraphic profiles is the most direct and effective method in geological exploration, and it is also a key technology for geological exploration in unknown areas. As one of the drilling methods, coring is in great demand in actual construction.

[0003] During drilling operations, the drill bit rubs against the geological rock formation, causing the drill bit to heat up, resulting in rapid wear and a short service life during use. The drill bit needs to be replaced frequently. The heat can also cause some of the drill bit connection parts to fail, affecting construction efficiency.

[0004] The Chinese patent with the patent publication number (CN112943111B) discloses a drill bit for quick replacement for earthquake engineering survey, including a drill bit, a connecting device and a drill rod; the other end of the connecting device is fixedly connected to the drill rod; the connecting device includes a connecting body, a piston and a clamping device; a first accommodating chamber, a piston chamber and a threaded chamber are provided in the connecting body; one end of the clamping device is located in the first accommodating chamber, and the other end is located at the lower end of the connecting body; one end of the piston is located in the piston chamber, and the other end is located in the threaded chamber; the piston chamber is connected to the first accommodating chamber; liquid is filled in the first accommodating chamber; the clamping device includes a connecting piece, a traction piece and a fixing piece; the traction piece can be scaled to float on the surface of the liquid, and the traction piece is an elastic buoyancy ball; one end of the connecting piece is connected to the traction piece, and the other end is connected to the fixing piece, and the fixing piece passes through the first accommodating chamber, and one end of the fixing piece is located at the lower part of the first accommodating chamber. The drill bit can be quickly replaced, and the structure is simple and the service life is long.

[0005] However, the above patent has the following defects: 1. Since the drill bit is connected to the drill rod by threads, once the drill bit deflects from the drill rod during long-term use, the fixing part will be stuck in the fixing groove, which is difficult to insert or pull out, affecting the connection stability; 2. When drilling, the liquid in the first accommodating chamber will surge due to centrifugal force, which may cause the fixing part to fall off from the fixing groove; 3. The place where the drill bit generates high temperature is where the drill bit contacts the rock formation. The patent mentions the use of liquid for cooling, but the place where the liquid is located is far away from the place where the drill bit generates high temperature, and the cooling effect is not obvious. Summary of the invention

[0006] Based on this, it is necessary to provide a diamond drill bit that is easy to disassemble and replace in view of the existing technical problems.

[0007] In order to solve the existing technical problems, the technical solution adopted by the present invention is: a diamond drill bit that is easy to disassemble and replace, comprising:

[0008] The cutter head body is arranged in a vertical state, a threaded column is formed at the center of the top of the cutter head body, a liquid inlet spiral channel and a liquid outlet spiral channel are arranged inside the cutter head body, the liquid inlet spiral channel is connected to the bottom of the liquid outlet spiral channel, and the openings of the liquid inlet spiral channel and the liquid outlet spiral channel are at the top of the cutter head body;

[0009] A connecting column is coaxially arranged above the cutter head body, a rotating main rod is fixedly formed at the top of the connecting column, the top of the rotating main rod is connected to the driving device, a sleeve rod is coaxially arranged on the rotating main rod, a liquid inlet channel and a liquid outlet channel are respectively vertically provided on the sleeve rod, the liquid inlet channel is connected to the external liquid pump device, and the liquid outlet channel is connected to the external liquid storage device, a threaded groove is provided at the center of the bottom of the connecting column, a water inlet hole and a water outlet hole are vertically provided on the connecting column, the water inlet hole is connected to the liquid inlet channel, and the water outlet hole is connected to the liquid outlet channel;

[0010] A first connecting mechanism is disposed at the top of the cutter head body;

[0011] The second connecting mechanism is arranged at the bottom end of the connecting column. The first connecting mechanism and the second connecting mechanism both include a large-diameter connector and a small-diameter connector. When the cutter head body is connected to the connecting column, the large-diameter connector is used to connect the liquid inlet channel with the liquid inlet spiral channel, and the small-diameter connector is used to connect the liquid outlet channel with the liquid outlet spiral channel.

[0012] Furthermore, the large-diameter connector includes a liquid transfer ring box, a sliding ring coaxially slidably arranged in the liquid transfer ring box, a plurality of spring pieces arranged in an annular shape at the bottom of the sliding ring, an annular cover fixedly arranged on the liquid transfer ring box, a plurality of abutment arc blocks fixedly arranged in an annular shape on the sliding ring, sealing arc blocks symmetrically arranged on both sides of each abutment arc block, a plurality of limiting arc holes in annular shape opened on the annular cover and water-passing arc holes opened on both sides of each limiting arc hole, a plurality of water flow holes evenly spaced on the sliding ring, one end of the spring piece is connected to the sliding ring, and the other end is connected to the annular cover, the liquid transfer ring box in the large-diameter connector located at the bottom of the connecting column is connected to the inside of the liquid inlet channel, and the liquid transfer ring box in the large-diameter connector located on the cutter head body is connected to the inside of the liquid inlet spiral channel.

[0013] Furthermore, the structure of the small-diameter connector is the same as that of the large-diameter connector, and the sizes of the liquid transfer ring box, sliding ring, spring piece, annular cover, abutment arc block, sealing arc block, water flow hole, limiting arc hole and water flow arc hole in the small-diameter connector are all smaller than the sizes of the liquid transfer ring box, sliding ring, spring piece, annular cover, abutment arc block, sealing arc block, water flow hole, limiting arc hole and water flow arc hole in the large-diameter connector. The liquid transfer ring box in the small-diameter connector located at the bottom of the connecting column is connected to the interior of the liquid outlet channel, and the liquid transfer ring box in the small-diameter connector located on the cutter head body is connected to the interior of the liquid outlet spiral channel.

[0014] Furthermore, a first transfer tube and a second transfer tube are provided on the cutter head body. The first transfer tube is provided at the bottom of the liquid transfer ring box in the large diameter connector on the cutter head body, and the second transfer tube is provided at the bottom of the liquid transfer ring box in the small diameter connector on the cutter head body.

[0015] Furthermore, a locking ring is fixedly provided on the cutter head body, a plurality of locking grooves are formed on the locking ring, a plurality of limiting vertical grooves are provided at the bottom of the connecting column, a locking rod is provided in each limiting vertical groove, a limiting spring is provided at the top of the locking rod, one end of the limiting spring is fixedly connected to the limiting vertical groove, and the other end is fixedly connected to the locking rod, an inclined surface is provided at the bottom of each locking rod, and the number of the limiting vertical grooves is consistent with the number of the locking grooves.

[0016] Furthermore, a supporting flange is formed at the bottom of the connecting column, a connecting ring is coaxially sleeved on the connecting column, a plurality of limiting grooves are arranged in a ring shape on the side wall of the connecting column, a connecting column is fixedly arranged on each locking rod, the connecting column is slidably arranged in the limiting groove, a plurality of lifting grooves are arranged in a ring shape on the inner wall of the connecting ring, and one end of each connecting column away from the locking rod is arranged in the lifting groove.

[0017] Furthermore, annular flanges are formed at the inner and outer edges of the large-diameter connector on the cutter head body and the annular cover inside the small-diameter connector, and annular grooves are provided at the inner and outer edges of the large-diameter connector on the connecting column and the annular cover inside the small-diameter connector.

[0018] Furthermore, a plurality of limiting holes are provided in a ring shape on the side wall of the connecting column, and a plurality of limiting pins are provided in a ring shape on the connecting ring. The limiting pins correspond to the limiting holes one by one, and the limiting pins are threadedly connected to the connecting ring.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] Firstly, the device is provided with a liquid inlet spiral channel and a liquid outlet spiral channel, so that cooling water can circulate around the cutter head body when drilling, thereby taking away the heat generated by the cutter head body during drilling, extending the service life of the cutter head body and increasing the stability of the device;

[0021] Second, by arranging the locking groove and the locking rod to cooperate with each other, the locking rod can be inserted into the locking groove after the threaded column and the threaded groove are tightened, thereby further strengthening the connection between the connecting column and the cutter head body, and preventing the connecting column and the cutter head body from relative deflection during drilling;

[0022] Thirdly, the large-diameter connector and the small-diameter connector of the device are provided with a resistance arc block, so that when the threaded column is screwed into the threaded groove, there will be no sense of frustration when the upper and lower resistance arc blocks touch each other. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic diagram of the three-dimensional structure of an embodiment;

[0024] Figure 2 is a schematic diagram of the three-dimensional structure of the cutter head body of the embodiment;

[0025] Figure 3 is a cross-sectional view of the embodiment when the cutter head body and the connecting column are separated;

[0026] Figure 4 is a cross-sectional view of the embodiment when the cutter head body and the connecting column are connected together;

[0027] Figure 5 yes Figure 3 A schematic diagram of the structure enlargement in the middle;

[0028] Figure 6 yes Figure 4 A magnified schematic diagram of the structure at B in the middle;

[0029] Figure 7 is a three-dimensional structural cross-sectional view of the embodiment when the cutter head body and the connecting column are separated;

[0030] Figure 8 This is a three-dimensional cross-sectional view of the cutter head body and the connecting column when they are connected together. Figure 1 ;

[0031] Fig. 9 This is a three-dimensional cross-sectional view of the cutter head body and the connecting column when they are connected together. Figure 2 ;

[0032] Fig.10 is a schematic diagram of the three-dimensional structure of a large-diameter connector of an embodiment;

[0033] Fig.11 is a schematic diagram of a three-dimensional structure explosion of a large-diameter connector of an embodiment;

[0034] Fig.12 is a schematic diagram of the three-dimensional structure of a small-diameter connector of an embodiment;

[0035] Fig.13is a schematic diagram of a three-dimensional structure explosion of a small-diameter connector of an embodiment;

[0036] Fig.14 is a schematic diagram of the three-dimensional structure of the connecting column of the embodiment;

[0037] Fig.15 is a schematic diagram of the three-dimensional structure of the locking ring of the embodiment;

[0038] The numbers in the figure are: 1, cutter head body; 2, liquid inlet spiral channel; 3, liquid outlet spiral channel; 4, threaded column; 5, locking ring; 6, locking groove; 7, connecting column; 8, rotating main rod; 9, sleeve rod; 10, liquid inlet channel; 11, liquid outlet channel; 12, threaded groove; 13, water inlet hole; 14, water outlet hole; 15, limit vertical groove; 16, locking rod; 17, inclined plane; 18, limit spring; 19, connecting column; 20, limit slide groove; 21, supporting flange; 22, limit hole; 23. Limiting pin; 24. Connecting ring; 25. Lifting groove; 26. First connecting mechanism; 27. Large diameter connector; 28. Small diameter connector; 29. ​​Second transfer tube; 30. First transfer tube; 31. Liquid transfer ring box; 32. Shrapnel; 33. Sliding ring; 34. Resistance arc block; 35. Sealing arc block; 36. Water flow hole; 37. Ring cover; 38. Limiting arc hole; 39. Water passing arc hole; 40. Ring flange; 41. Ring groove; 42. Second connecting mechanism. DETAILED DESCRIPTION

[0039] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0040] refer to Figures 1 to 15 :

[0041] A diamond drill bit that is easy to disassemble and replace, comprising:

[0042] The cutter head body 1 is arranged in a vertical state, a threaded column 4 is formed at the center of the top of the cutter head body 1, a liquid inlet spiral channel 2 and a liquid outlet spiral channel 3 are arranged inside the cutter head body 1, the liquid inlet spiral channel 2 is connected to the bottom of the liquid outlet spiral channel 3, and the openings of the liquid inlet spiral channel 2 and the liquid outlet spiral channel 3 are at the top of the cutter head body 1;

[0043] A connecting column 7 is coaxially arranged above the cutter head body 1, a rotating main rod 8 is fixedly formed at the top of the connecting column 7, the top of the rotating main rod 8 is connected to the driving device, a sleeve rod 9 is coaxially arranged on the rotating main rod 8, and a liquid inlet channel 10 and a liquid outlet channel 11 are respectively vertically opened on the sleeve rod 9, the liquid inlet channel 10 is connected to the external pumping device, and the liquid outlet channel 11 is connected to the external liquid storage device, a threaded groove 12 is opened at the center of the bottom of the connecting column 7, and a water inlet hole 13 and a water outlet hole 14 are vertically opened on the connecting column 7, the water inlet hole 13 is connected to the liquid inlet channel 10, and the water outlet hole 14 is connected to the liquid outlet channel 11;

[0044] The first connecting mechanism 26 is disposed at the top of the cutter head body 1;

[0045] The second connecting mechanism 42 is arranged at the bottom end of the connecting column 7. The first connecting mechanism 26 and the second connecting mechanism 42 both include a large-diameter connector 27 and a small-diameter connector 28. When the cutter head body 1 is connected to the connecting column 7, the large-diameter connector 27 is used to connect the liquid inlet channel 10 with the liquid inlet spiral channel 2, and the small-diameter connector 28 is used to connect the liquid outlet channel 11 with the liquid outlet spiral channel 3.

[0046] When assembling the equipment, the threaded column 4 on the cutter head body 1 is screwed into the thread groove 12. As the threaded column 4 is gradually screwed into the thread groove 12, the first connecting mechanism 26 and the second connecting mechanism 42 are driven to operate, the large-diameter connector 27 connects the liquid inlet channel 10 with the liquid inlet spiral channel 2, and the small-diameter connector 28 connects the liquid outlet channel 11 with the liquid outlet spiral channel 3. Then, the main rod 8 is rotated to start driving the connecting column 7 to rotate (it should be noted that the rotating main rod 8 is connected to the power source). The rotation of the connecting column 7 drives the cutter head body 1 to rotate and start drilling. When the drill head body is working, the external cooling Water enters the large diameter connector 27 from the liquid inlet channel 10 and enters the liquid inlet spiral channel 2, flows along the liquid inlet spiral channel 2 and then enters the liquid outlet spiral channel 3, then enters the small diameter connector 28 from the liquid outlet spiral channel 3, and finally enters the liquid outlet channel 11 and flows into the external liquid storage device. It is worth mentioning that the cooling water in the external liquid storage device can be pumped into the liquid inlet pipe through the pumping device, so that the cooling water forms a circulation, and then during the drilling process, the heat generated by the drill bit body during operation can be taken away by the flowing cooling water, ensuring that the equipment can be used for a long time, extending the service life of the equipment, and improving the drilling efficiency.

[0047] In order to show the detailed structure of the large diameter connector 27, the following features are specifically provided:

[0048] The large diameter connector 27 includes a liquid transfer ring box 31, a sliding ring 33 (such as Fig.11As shown in the figure), several spring pieces 32 arranged in annular shape at the bottom of the sliding ring 33, an annular cover 37 fixedly arranged on the liquid transfer ring box 31, several abutment arc blocks 34 arranged in annular shape and fixedly on the sliding ring 33, blocking arc blocks 35 symmetrically arranged on both sides of each abutment arc block 34, several limiting arc holes 38 arranged in annular shape on the annular cover 37 and water-passing arc holes 39 arranged on both sides of each limiting arc hole 38, several water flow holes 36 are evenly spaced on the sliding ring 33, one end of the spring piece 32 is connected to the sliding ring 33, and the other end is connected to the annular cover 37, the liquid transfer ring box 31 in the large diameter connector 27 at the bottom of the connecting column 7 is connected to the inside of the liquid inlet channel 10, and the liquid transfer ring box 31 in the large diameter connector 27 on the cutter head body 1 is connected to the inside of the liquid inlet spiral channel 2.

[0049] In order to show the detailed structure of the small-diameter connector 28, the following features are specifically provided:

[0050] The structure of the small-diameter connector 28 is the same as that of the large-diameter connector 27. The sizes of the liquid transfer ring box 31, sliding ring 33, spring piece 32, annular cover 37, abutting arc block 34, blocking arc block 35, water flow hole 36, limiting arc hole 38 and water flow arc hole 39 in the small-diameter connector 28 are all smaller than the sizes of the liquid transfer ring box 31, sliding ring 33, spring piece 32, annular cover 37, abutting arc block 34, blocking arc block 35, water flow hole 36, limiting arc hole 38 and water flow arc hole 39 in the large-diameter connector 27. The liquid transfer ring box 31 in the small-diameter connector 28 located at the bottom of the connecting column 7 is connected to the inside of the liquid outlet channel 11, and the liquid transfer ring box 31 in the small-diameter connector 28 located on the cutter head body 1 is connected to the inside of the liquid outlet spiral channel 3.

[0051] It should be noted that, under the action of the spring piece 32, the sliding ring 33 is tightly attached to the bottom of the annular cover 37 in the normal state, and the blocking arc block 35 blocks the water arc hole 39. In the process of tightening the threaded column 4, the abutting arc blocks 34 on the large-diameter connector 27 and the small-diameter connector 28 gradually touch each other until the threaded column 4 is completely tightened, and the abutting arc block 34 is completely pressed into the limiting arc hole 38. In this process, as the abutting arc block 34 is pressed into the limiting arc hole 38, the blocking arc block 35 gradually opens the water arc hole 39, and then the cooling water can flow through the water arc hole 39, and then cooperate with the water flow hole 36 on the sliding ring 33, so that a water flow path is formed between the liquid inlet channel 10, the liquid inlet spiral channel 2, the liquid outlet spiral channel 3 and the liquid outlet channel 11.

[0052] In order to show the connection relationship between the large-diameter connector 27 and the small-diameter connector 28 and the cutter head body 1, the following features are specifically provided:

[0053] The cutter head body 1 is provided with a first transfer tube 30 and a second transfer tube 29 (such as Figure 2As shown in the figure, the first transfer tube 30 is arranged at the bottom of the transfer liquid ring box 31 in the large-diameter connector 27 on the cutter head body 1, and the second transfer tube 29 is arranged at the bottom of the transfer liquid ring box 31 in the small-diameter connector 28 on the cutter head body 1.

[0054] The arrangement of the first transfer tube 30 and the second transfer tube 29 enables the cooling water to flow smoothly.

[0055] In order to ensure that the connection column 7 can be more firmly connected to the cutter head body 1, the following features are specifically provided:

[0056] A locking ring 5 (such as Figure 7 As shown in FIG. 1 ), a plurality of locking grooves 6 are formed on the locking ring 5, and a plurality of limiting vertical grooves 15 (such as Fig.14 As shown in FIG. 1 ), a locking rod 16 is disposed in each limiting vertical slot 15, and a limiting spring 18 is disposed at the top of the locking rod 16 (as shown in FIG. 1 ). Fig.15 As shown in the figure, one end of the limit spring 18 is fixedly connected to the limit vertical groove 15, and the other end is fixedly connected to the locking rod 16. The bottom of each locking rod 16 is provided with an inclined surface 17, and the number of the limit vertical grooves 15 is consistent with the number of the locking grooves 6.

[0057] During the process of screwing in the threaded column 4, the locking groove 6 on the locking ring 5 gradually comes into contact with the locking rod 16. The setting of the inclined surface 17 can facilitate the locking groove 6 to smoothly flip over the locking rod 16 during screwing in. During the process of screwing in the threaded column 4, the limit spring 18 adaptively contracts, waiting for the threaded column 4 to be completely tightened, and the locking rod 16 is inserted into the locking groove 6. At this time, the connecting column 7 is further locked to prevent loosening when the drill body is working. If the drill body needs to be replaced, just pull the locking rod 16 out of the locking groove 6, and then reversely twist the connecting column 7 to complete the disassembly of the cutter head body 1.

[0058] In order to facilitate the replacement of the cutter head body 1, the following features are specifically provided:

[0059] A supporting flange 21 is formed at the bottom of the connecting column 7, and a connecting ring 24 (such as Fig.15 As shown in the figure, a plurality of limiting grooves 20 are formed in an annular shape on the side wall of the connecting column 7, a connecting column 19 is fixedly provided on each locking rod 16, and the connecting column 19 is slidably provided in the limiting groove 20, and a plurality of lifting grooves 25 are formed in an annular shape on the inner wall of the connecting ring 24, and one end of each connecting column 19 away from the locking rod 16 is provided in the lifting groove 25.

[0060] In order to ensure that the cooling water does not overflow when the device is running, the specific settings have the following features:

[0061] Annular flanges 40 are formed at the inner and outer edges of the large diameter connector 27 located on the cutter head body 1 and the annular cover 37 inside the small diameter connector 28, and annular grooves 41 are opened at the inner and outer edges of the large diameter connector 27 located on the connecting column 7 and the annular cover 37 inside the small diameter connector 28.

[0062] In order to ensure that the position of the connecting ring 24 does not move as the drilling progresses when the device is in operation, the following features are specifically provided:

[0063] A plurality of limiting holes 22 are provided in an annular shape on the side wall of the connecting column 7 , and a plurality of limiting pins 23 are provided in an annular shape on the connecting ring 24 . The limiting pins 23 correspond to the limiting holes 22 one by one, and the limiting pins 23 are threadedly connected to the connecting ring 24 .

[0064] Under normal circumstances, under the action of the limit spring 18, the connecting column 19 is against the bottom of the lifting groove 25. In the process of screwing in the threaded column 4, the connecting column 19 moves up and down in the lifting groove 25 as the locking rod 16 moves up and down; when the cutter head body 1 needs to be removed, first remove the limit pin 23 (it should be noted that the limit pin 23 and the supporting flange 21 are provided to prevent the connecting ring 24 from moving due to friction during the drilling process), and then push the connecting ring 24 upward. The movement of the connecting ring 24 drives the locking rod 16 to move upward and squeeze the limit spring 18, so that the locking rod 16 is pulled out of the locking groove 6, and then the threaded column 4 is rotated in the opposite direction to remove the cutter head body 1.

[0065] Working principle: When assembling the equipment, screw the threaded column 4 on the cutter head body 1 into the thread groove 12. As the threaded column 4 is gradually screwed into the thread groove 12, the upper and lower sets of corresponding large-diameter connectors 27 and small-diameter connectors 28 gradually touch each other until the threaded column 4 is completely tightened and the contact arc block 34 is completely pressed into the limiting arc hole 38 (at this time, the top of the contact arc block 34 is flush with the surface of the annular cover 37). Figure 5 , Figure 6 ) In this process, as the resistance arc block 34 is pressed into the limit arc hole 38, the spring piece 32 is gradually compressed, and the sliding ring 33 moves away from the annular cover 37, so that the blocking arc block 35 gradually separates from the water arc hole 39, and then the cooling water can flow through the water arc hole 39, and then cooperate with the water flow hole 36 on the sliding ring 33, so that a water flow path is formed between the liquid inlet channel 10, the water inlet hole 13, the large diameter connector 27, the liquid inlet spiral channel 2, the liquid outlet spiral channel 3, the small diameter connector 28, the water outlet hole 14 and the liquid outlet channel 11 (the water flow direction is Figure 4In addition, the locking groove 6 on the connecting ring 24 gradually touches the locking rod 16. The setting of the inclined surface 17 can facilitate the locking groove 6 to smoothly turn over the locking rod 16 when screwing in. In the process of screwing in the threaded column 4, the limit spring 18 shrinks adaptively, and the connecting column 19 moves up and down in the lifting groove 25 with the up and down movement of the locking rod 16, waiting for the threaded column 4 to be completely tightened, and the locking rod 16 is inserted into the locking groove 6 (at this time, the locking rod 16 corresponds to the locking groove 6 one by one). At this time, the connecting column 7 is further locked, and then the limit pin 23 is inserted into the limit hole 22.

[0066] Then, the main rod 8 is rotated to start the connection column 7 to rotate. The connection column 7 rotates to drive the cutter head body 1 to rotate and start drilling. When the drill head body is working, the external cooling water enters the large diameter connector 27 from the liquid inlet channel 10 and enters the liquid inlet spiral channel 2, flows along the liquid inlet spiral channel 2 and then enters the liquid outlet spiral channel 3, and then enters the small diameter connector 28 from the liquid outlet spiral channel 3, and finally enters the liquid outlet channel 11 and flows into the external liquid storage device. It is worth mentioning that the cooling water in the external liquid storage device can be pumped into the liquid inlet pipe through the pumping device, so that the cooling water forms a circulation, and then during the drilling process, the heat generated by the drill head body during operation can be taken away by the flowing cooling water, ensuring that the equipment can be used for a long time, extending the service life of the equipment, and improving the drilling efficiency. It should also be noted that when replacing the cutter head body 1, some cooling water will overflow, which is a normal loss. The device is provided with a spring piece 32. As the cutter head body 1 is separated from the connecting column 7, the abutting arc blocks 34 in the upper and lower groups of corresponding large-diameter connectors 27 and small-diameter connectors 28 no longer squeeze each other. Then the spring piece 32 releases the pressure to drive the sliding ring 33 to reset elastically, ensuring that the blocking arc block 35 is reinserted into the water-passing arc hole 39 and the water flow path is disconnected in time. Through the above process, it is ensured that only a small part of the cooling water will overflow and will not affect the normal operation of the equipment.

[0067] The above embodiments only express one or several implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the attached claims.

Claims

1. A diamond drill bit that is easy to disassemble and replace, characterized in that: include: The cutter head body (1) is arranged in a vertical state, a threaded column (4) is formed at the center of the top of the cutter head body (1), a liquid inlet spiral channel (2) and a liquid outlet spiral channel (3) are arranged inside the cutter head body (1), the liquid inlet spiral channel (2) and the liquid outlet spiral channel (3) are connected at the bottom, and the openings of the liquid inlet spiral channel (2) and the liquid outlet spiral channel (3) are at the top of the cutter head body (1); A connecting column (7) is coaxially arranged above the cutter head body (1); a rotating main rod (8) is fixedly formed on the top of the connecting column (7); the top of the rotating main rod (8) is connected to the driving device; a sleeve rod (9) is coaxially arranged on the rotating main rod (8); a liquid inlet channel (10) and a liquid outlet channel (11) are respectively vertically provided on the sleeve rod (9); the liquid inlet channel (10) is connected to an external liquid pump device; the liquid outlet channel (11) is connected to an external liquid storage device; a threaded groove (12) is provided at the center of the bottom of the connecting column (7); a water inlet hole (13) and a water outlet hole (14) are vertically provided on the connecting column (7); the water inlet hole (13) is connected to the liquid inlet channel (10); and the water outlet hole (14) is connected to the liquid outlet channel (11); A first connecting mechanism (26) is arranged at the top of the cutter head body (1); a second connection mechanism (42) disposed at the bottom end of the connection column (7); the first connection mechanism (26) and the second connection mechanism (42) both comprising a large-diameter connector (27) and a small-diameter connector (28); when the cutter head body (1) and the connection column (7) are connected together, the large-diameter connector (27) is used to connect the liquid inlet channel (10) with the liquid inlet spiral channel (2), and the small-diameter connector (28) is used to connect the liquid outlet channel (11) with the liquid outlet spiral channel (3); The large-diameter connector (27) comprises a liquid transfer ring box (31), a sliding ring (33) coaxially slidably arranged in the liquid transfer ring box (31), a plurality of spring pieces (32) arranged in an annular shape at the bottom of the sliding ring (33), an annular cover (37) fixedly arranged on the liquid transfer ring box (31), a plurality of abutting arc blocks (34) arranged in an annular shape fixedly on the sliding ring (33), blocking arc blocks (35) symmetrically arranged on both sides of each abutting arc block (34), a plurality of limiting arc holes (35) opened in an annular shape on the annular cover (37), and a plurality of arc-shaped holes (36) arranged in an annular shape on the annular cover (37). 8) and water-passing arc holes (39) opened on both sides of each limiting arc hole (38), a plurality of water flow holes (36) are evenly spaced on the sliding ring (33), one end of the spring (32) is connected to the sliding ring (33), and the other end is connected to the annular cover (37), the liquid transfer ring box (31) in the large-diameter connector (27) at the bottom of the connecting column (7) is connected to the inside of the liquid inlet channel (10), and the liquid transfer ring box (31) in the large-diameter connector (27) on the cutter head body (1) is connected to the inside of the liquid inlet spiral channel (2); The structure of the small-diameter connector (28) is the same as that of the large-diameter connector (27). The sizes of the liquid transfer ring box (31), the sliding ring (33), the spring piece (32), the annular cover (37), the abutting arc block (34), the blocking arc block (35), the water flow hole (36), the limiting arc hole (38) and the water flow arc hole (39) in the small-diameter connector (28) are all smaller than the sizes of the liquid transfer ring box (31), the sliding ring (33), the spring piece (32), the annular cover (37), the abutting arc block (34), the blocking arc block (35), the water flow hole (36), the limiting arc hole (38) and the water flow arc hole (39) in the large-diameter connector (27). The liquid transfer ring box (31) in the small-diameter connector (28) located at the bottom of the connecting column (7) is communicated with the interior of the liquid outlet channel (11), and the liquid transfer ring box (31) in the small-diameter connector (28) located on the cutter head body (1) is communicated with the interior of the liquid outlet spiral channel (3).

2. A diamond drill bit that is easy to disassemble and replace according to claim 1, characterized in that: A first transfer tube (30) and a second transfer tube (29) are provided on the cutter head body (1); the first transfer tube (30) is provided at the bottom of a liquid transfer ring box (31) in a large-diameter connector (27) on the cutter head body (1); and the second transfer tube (29) is provided at the bottom of a liquid transfer ring box (31) in a small-diameter connector (28) on the cutter head body (1).

3. A diamond drill bit that is easy to disassemble and replace according to claim 2, characterized in that: A locking ring (5) is fixedly arranged on the cutter head body (1), and a plurality of locking grooves (6) are formed on the locking ring (5). A plurality of limiting vertical grooves (15) are provided at the bottom of the connecting column (7), and a locking rod (16) is provided in each limiting vertical groove (15). A limiting spring (18) is provided at the top of the locking rod (16), and one end of the limiting spring (18) is fixedly connected to the limiting vertical groove (15), and the other end is fixedly connected to the locking rod (16). An inclined surface (17) is provided at the bottom of each locking rod (16), and the number of the limiting vertical grooves (15) is the same as the number of the locking grooves (6).

4. A diamond drill bit that is easy to disassemble and replace according to claim 3, characterized in that: A supporting flange (21) is formed at the bottom of the connecting column (7), a connecting ring (24) is coaxially sleeved on the connecting column (7), a plurality of limiting slide grooves (20) are annularly provided on the side wall of the connecting column (7), a connecting column (19) is fixedly provided on each locking rod (16), the connecting column (19) is slidably provided in the limiting slide groove (20), a plurality of lifting grooves (25) are annularly provided on the inner wall of the connecting ring (24), and an end of each connecting column (19) away from the locking rod (16) is provided in the lifting groove (25).

5. The diamond drill bit that is easy to disassemble and replace according to claim 4, characterized in that: Annular flanges (40) are formed at the inner and outer edges of the large-diameter connector (27) and the annular cover (37) in the small-diameter connector (28) on the cutter head body (1), and annular grooves (41) are formed at the inner and outer edges of the large-diameter connector (27) and the annular cover (37) in the small-diameter connector (28) on the connecting column (7).

6. The diamond drill bit that is easy to disassemble and replace according to claim 5, characterized in that: A plurality of limiting holes (22) are provided in an annular shape on the side wall of the connecting column (7), and a plurality of limiting pins (23) are provided in an annular shape on the connecting ring (24). The limiting pins (23) correspond to the limiting holes (22) one by one, and the limiting pins (23) are threadedly connected to the connecting ring (24).

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