Rock drilling and sampling device for highway construction

Abstract

The invention belongs to the field of rock-soil drilling equipment, and discloses a highway construction rock drilling sampling device which comprises a rack, a sampling device and a sampling device, the drill rod assembly is arranged on the rack and comprises an inner shaft rod and an outer sleeve rod, and the inner shaft rod is rotationally sleeved with the outer sleeve rod; the first driving mechanism at least drives the outer sleeve rod to rotate; and the drill bit assembly is connected with the drill rod assembly. Through the drill rod assembly and the drill bit assembly, a sampling component and a drilling component of the drill bit assembly are matched with a limiting tooth part through a movable ratchet assembly, state switching of the sampling component and the drilling component can be achieved, and when the drilling component is reversely screwed out after drilling, a movable tightening piece can be driven to move by rotating relative to the sampling component; and the movable tightening part of the sampling component can tighten and clamp the sample, so that the friction force in the sampling process can be increased, the sample is not easy to fall off, the structure is simpler, and the operation is easy.

Description

Technical Field

[0001] The invention belongs to the technical field of rock drilling equipment, and in particular relates to a rock drilling sampling device for highway construction. Background Art

[0002] In highway construction, it is necessary to conduct random sampling inspections on roads that have been completed or are before construction, so as to arrange construction plans or ensure road quality and safety according to the rock and soil conditions. At this time, a rock drilling sampling device is needed to take samples, conduct various data tests on the samples, and judge the rock conditions or quality through data test analysis. During the highway construction rock drilling sampling process, due to the large weight of the samples and the limited friction between the samples and the sampling drill bit, the samples are prone to fall when the drill bit is taken out, making it impossible to conveniently sample.

[0003] In the prior art, in order to reduce the friction between the sample and the sampling drill bit, one technical solution is to set a conical insert, which is inserted downward along the conical groove on the inner wall of the sampling drill barrel between the sampling sleeve and the cylindrical sample to provide an interference fit, thereby increasing the friction between the sampling drill barrel and the cylindrical sample. However, the conical insert needs to be operated separately, and the friction between the sample and the sleeve is increased by the conical insert, which makes the operation steps complicated, thereby reducing the sampling efficiency of the equipment, and there are certain usage defects; another technical solution is to increase the friction between the sampling drill barrel and the sample through the impurities in the cooling water during the recovery process of the sprayed and settled cooling water, but the cooling water will also increase the lubricity between the sample and the sleeve during the recovery process, resulting in unsatisfactory friction increase effect, and it is also necessary to set up a more complex cooling water recovery mechanism, and the structure is more complex. Summary of the invention

[0004] In view of this, an object of the present invention is to provide a rock drilling sampling device for highway construction, so as to solve the problem that the sample of the existing rock drilling sampling device is easy to fall off from the sleeve.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A highway construction rock drilling sampling device, comprising: frame; A drill rod assembly is arranged on the frame, the drill rod assembly comprises an inner shaft and an outer shaft, and the inner shaft is rotatably sleeved with the outer shaft; A driving mechanism for at least driving the outer sleeve to rotate; A drill bit assembly connected to the drill rod assembly, the drill bit assembly comprising a sampling component, a drilling component and a movable tightening member, the drilling component is hollow inside, the sampling component is rotatably sleeved in the drilling component and fixedly connected to the inner shaft rod, the drilling component is fixedly connected to the outer sleeve rod, a limiting tooth portion distributed circumferentially around the inner shaft rod is provided between the sampling component and the inner shaft rod, a movable ratchet assembly meshing with the limiting tooth portion is provided in the drilling component, the movable ratchet assembly cooperates with the limiting tooth portion to enable the drilling component to have at least a first state and a second state, and in the first state the drilling component The component and the sampling component are stopped in the circumferential direction, and in the second state, the drilling component can only rotate along the first direction relative to the sampling component; the sampling component has a movable tightening part, and the movable tightening part includes movable jaws in a petal shape and distributed at intervals along the circumferential direction; the movable tightening part is movably sleeved on the outside of the movable tightening part and stopped in the circumferential direction, and the movable tightening part is threadedly matched with the inner wall of the drilling component to enable the movable part to switch axially between the tightening position and the tightening release position, and when the movable tightening part is in the tightening position, the gap between the movable jaws is reduced and enclosed inward to clamp the sample.

[0006] In a possible implementation, the inner diameter of the movable tightening piece gradually changes along the axial direction, the outer diameter of the movable tightening portion gradually changes along the axial direction, the gradual change direction of the inner diameter of the movable tightening piece from large to small is consistent with the gradual change direction of the outer diameter of the movable tightening portion from large to small, and the movable tightening piece is located at the tail end of the movable tightening portion when it is in the tightening and unlocking position.

[0007] In a possible implementation, the thickness of the movable tightening portion is smaller than the thickness of the main body of the sampling member, so as to form an active cavity between the movable tightening portion and the drilling member for the movable tightening member to move axially.

[0008] In a possible implementation, the outer wall of at least one movable clamping claw of the movable tightening portion is provided with a guide rib along a first direction parallel to the axial direction, and the inner wall of the movable tightening member is provided with a guide groove that slidably cooperates with the guide rib.

[0009] In a possible implementation, the movable ratchet assembly cooperates with the limiting tooth portion to allow the drilling member to have a third state. In the third state, the drilling member can only rotate along a second direction relative to the sampling member, and the second direction is opposite to the first direction.

[0010] In a possible implementation, the movable ratchet assembly includes a limit rod, a first spring, a transmission cam and a shift rod. The limit rod is provided with two and is rotatably arranged on the inner wall of the drilling component. The limit rod has a limit portion that engages with the limit tooth portion. The two limit rods are respectively engaged with the two sides of the limit tooth portion through the limit portions. A transmission cam is provided between the two limit rods. The transmission cam is used to drive the limit portion of the limit rod away from the limit tooth portion. A first spring is provided between the limit rod and the inner wall of the drilling component to drive the limit rod close to the limit tooth portion. The shift rod is provided outside the sampling component and is connected to the transmission cam through a rotating shaft.

[0011] In a possible implementation, it also includes a first connecting sleeve mounted on the outer outer rod, the outer periphery of the outer outer rod is provided with an axially distributed first sliding tooth portion, the inner side of the first connecting sleeve is provided with a second sliding tooth portion, the second sliding tooth portion is meshed with the first sliding tooth portion, the outer outer rod is rotatably connected to the frame through the first connecting sleeve, a transmission portion is provided on the outer side of the first connecting sleeve, and the transmission portion is in transmission cooperation with the driving mechanism to drive the first connecting sleeve to rotate.

[0012] In a possible implementation, it further includes a second driving mechanism, which is transmission-connected to the inner shaft and drives the drill rod assembly to rise and fall axially.

[0013] In a possible implementation, it also includes a guiding mechanism, which includes a second connecting sleeve, a guiding member and an elastic member. The guiding member is slidably connected to the frame along the lifting direction of the drill rod assembly, and both ends of the guiding member are rotatably connected to the second connecting sleeve sleeved on the outside of the outer sleeve rod. The inner wall of the second connecting sleeve is provided with a third sliding tooth portion along the circumferential direction, and the third sliding tooth portion cooperates with the first sliding tooth portion. The outer sleeve of the guiding member is provided with an elastic member, and the bottom of the elastic member abuts against the lifting frame.

[0014] In a possible implementation, the frame includes a base, a frame body and a third driving mechanism, the base is provided with a channel that passes through from top to bottom for the drill rod assembly to pass through, the base is provided with a first threaded transmission part distributed along the circumferential direction, the frame body is provided with a second threaded transmission part distributed along the circumferential direction, the first threaded transmission part is threadedly matched with the second threaded transmission part, and the third driving mechanism is connected to the frame body in a transmission manner to drive the frame body to rotate.

[0015] In a possible implementation, a water tank is provided in the base, and the water tank is connected to a spray device provided on the circumferential inner wall of the base channel through a delivery pipeline.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The highway construction rock drilling sampling device of the present invention uses a drill rod assembly and a drill bit assembly. The sampling component and the drilling component of the drill bit assembly cooperate with the movable ratchet assembly and the limiting tooth portion to realize the state switching of the sampling component and the drilling component. When the drilling component is reversely rotated out after drilling, it can drive the movable tightening part to move by relative rotation with the sampling component, and the movable tightening part of the sampling component can tighten and clamp the sample, thereby increasing the friction force in the sampling process, making the sample not easy to fall off, and the structure is simpler and easier to operate.

[0017] Moreover, after the drill bit assembly takes a sample, the movable ratchet assembly can be adjusted, and the driving mechanism can drive the drilling component to rotate forward relative to the sampling component, so that the movable tightening part can release the clamping of the sample, thereby facilitating the removal of the sample, and the operation is convenient and quick.

[0018] At the same time, the outer sleeve and the first connecting sleeve on the outside are matched through the sliding gear structure. When driving the outer sleeve to rotate, the driving mechanism 1 can also facilitate the driving mechanism 2 to drive the drill rod assembly to lift and lower. They do not interfere with each other, and the structural design is more reasonable. The guide mechanism can be raised and lowered along with the lifting and lowering of the drill rod assembly. Especially when the drill rod assembly descends to a greater depth, the follow-up descent of the guide mechanism can also play a good guiding role and centering role for the drill rod assembly, so that the drill rod drilling is more accurate and more stable.

[0019] In addition, the frame body of the frame can be raised and lowered under the drive of the driving mechanism three, so that the height can be adjusted according to the drilling depth and it can better adapt to different working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a cross-sectional schematic diagram of a rock drilling sampling device for highway construction; Figure 2 for Figure 1 A partial enlarged schematic diagram of Figure 3 It is a front view of a rock drilling sampling device for highway construction; Figure 4 It is a cross-sectional schematic diagram of a highway construction rock drilling sampling device during initial drilling; Figure 5 It is a cross-sectional schematic diagram of a highway construction rock drilling sampling device when the drilling is in place; Figure 6 A schematic cross-sectional view of a drill bit assembly of a highway construction rock drilling sampling device; Figure 7 A schematic cross-sectional view of a movable ratchet assembly of a highway construction rock drilling sampling device; Figure 8 This is a schematic diagram of an explosion of a drill bit assembly of a highway construction rock drilling sampling device.

[0021] In the figure: 1-frame; 11-frame body; 111-second threaded transmission part; 112-fourth sliding gear part; 113-internal thread; 12-base; 121-first threaded transmission part; 122-external thread; 123-cabin door; 124-water tank; 125-spray device; 126-protective door; 13-mounting plate; 2-driving mechanism 1; 21-driving motor 1; 22-gear 2; 3-drill rod assembly; 31-inner shaft rod; 32-outer rod; 33-first connecting sleeve; 34-transmission part; 35-first sliding gear part; 4-drill head group; 41-drilling member; 411-shielding convex edge; 412-drill teeth; 413-active cavity; 42-sampling member; 421-active tightening part; 4211-active clamping claw; 4212-guide rib; 43-active tightening member; 431-guide groove; 44-active ratchet assembly; 441-shift lever; 442-limiting lever; 443-transmission cam; 444-first spring; 45-limiting tooth portion; 5-guide mechanism; 51-guide member; 52-elastic member; 53-second connecting sleeve; 6-driving mechanism two; 61-driving motor two; 62-screw; 63-threaded transmission sleeve; 64-connecting rod; 7-driving mechanism three. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with specific implementation methods.

[0023] Please refer to Figure 1-8 As shown, an embodiment of the present application provides a highway construction rock drilling sampling device, comprising: a frame 1; a drill rod assembly 3 arranged on the frame 1, the drill rod assembly 3 comprising an inner shaft rod 31 and an outer shaft rod 32, the inner shaft rod 31 is rotatably sleeved with the outer shaft rod 32; a driving mechanism 2 for at least driving the outer shaft rod 32 to rotate; and a drill bit group 4 connected to the drill rod assembly 3.

[0024] The drill rod assembly 3 is connected to the drill bit assembly 4 as a whole. The drill bit assembly 4 is used for drilling and sampling, and the drill rod assembly 3 is used to rotate and / or lift together with the drill bit assembly 4. The outer rod 32 of the drill rod assembly 3 is rotatably sleeved on the outer side of the inner shaft rod 31. The relative rotation setting can facilitate the driving mechanism 2 to drive the outer rod 32 to rotate and drive the drilling member 41 to rotate, while the inner shaft rod 31 is relatively fixed, which can facilitate the active tightening member 43 and the active tightening part 421 to clamp the sample. The driving mechanism 2 can adopt the existing driving mechanism that drives the outer rod 32 to rotate and lifts the drill rod assembly 3.

[0025] Please refer to Figure 1 , Figure 6 and Figure 8As shown, in the embodiment of the present application, the drill bit group 4 includes a sampling component 42, a drilling component 41 and a movable tightening component 43. The interior of the drilling component 41 is hollow. The sampling component 42 is rotatably sleeved in the drilling component 41 and fixedly connected to the inner shaft rod 31. The drilling component 41 is fixedly connected to the outer sleeve rod 32. A limiting tooth portion 45 distributed circumferentially around the inner shaft rod 31 is provided between the sampling component 42 and the inner shaft rod 31. A movable ratchet assembly 44 engaged with the limiting tooth portion 45 is provided in the drilling component 41. The movable ratchet assembly 44 cooperates with the limiting tooth portion 45 to enable the drilling component 41 to have at least a first state and a second state. In the first state, the drilling The drilling member 41 and the sampling member 42 are stopped in the circumferential direction, and in the second state, the drilling member 41 can only rotate along the first direction relative to the sampling member 42; the sampling member 42 has a movable tightening portion 421, and the movable tightening portion 421 includes movable clamping jaws 4211 in a petal shape and distributed at intervals along the circumferential direction; the movable tightening member is movably sleeved on the outside of the movable tightening portion 421 and stopped in the circumferential direction, and the movable tightening member 43 is threadedly matched with the inner wall of the drilling member 41 to enable the movable member to switch axially between the tightening position and the tightening release position, and when the movable tightening member 43 is in the tightening position, the gap between the movable clamping jaws 4211 is reduced and enclosed inward to clamp the sample.

[0026] The sampling member 42 of the drill bit group 4 is a sleeve-shaped structure, which is used for rock and soil to enter during the drilling process, and then the drill bit group 4 is screwed out of the borehole to achieve sampling. The drilling member 41 is used to form a borehole in the rock and soil layer to facilitate sampling by the sampling member 42. The drilling member 41 is also a sleeve-shaped structure, and a drill tooth 412 is arranged along the circumferential direction on its bottom end surface. The drill tooth 412 can be screwed in to form a borehole when the drill bit member is highly rotated. The sampling frame is fixedly connected to the inner shaft rod 31, and the drilling member 41 is fixedly connected to the outer sleeve rod 32, so that it is convenient to drive the drilling member 41 through the driving mechanism 2, and make it rotate relative to or synchronously with the sampling member 42. A limit tooth portion 45 is provided between the inner shaft 31 and the sampling member 42. The limit tooth portion 45 cooperates with the movable ratchet assembly 44 to form a ratchet structure similar to a ratchet wheel. The movable ratchet assembly 44 is used to adjust whether to limit the sampling member 42 in one direction and / or stop it circumferentially. This makes it easy to control the rotation direction of the drilling member 41 relative to the sampling member 42 and whether it is stationary. Then, the movable ratchet assembly 44 cooperates with the limit tooth portion 45 to make the drilling member 41 have at least a first state and a second state. In the first state, the drilling member 41 and the sampling member 42 are stopped in the circumferential direction. In this state, when the driving mechanism 2 drives the drilling member 41 to rotate and drill, the sampling member 42 stopped in the circumferential direction rotates together with the drilling member 41, so that the movable tightening member 43 can be prevented from moving in advance. In the second state, the drilling member 41 can only rotate in a first direction relative to the sampling member 42. The first direction can be a direction opposite to the rotation direction during drilling. For example, when the drill bit assembly 4 is screwed out of the borehole, In the second state, the screw-in assembly can not only facilitate unscrewing the drill hole, but also drive the inner movable tightening part 421 to move by rotating in the first direction. Since the movable tightening piece 43 is threadedly matched with the inner wall of the drilling component 41 and is stopped in the circumferential direction with the movable tightening part 421, but can slide axially, when the drilling component 41 rotates in the first direction, the movable tightening piece 43 can be moved axially from the unlocking position to the tightening position. In this process, the multiple movable clamping claws 4211 with a petal-like structure spaced apart by the movable tightening part 421 can be gathered and tightened, so as to clamp the inner sample. At the same time, the sample has a large weight, which also makes the gravity of the sampling component 42 large. In this way, the screw-in component can be rotated relative to the sampling component 42 to drive the movable tightening piece 43 to tighten, thereby increasing the friction between the sample and the sampling component 42, so that the sample is more firmly controlled in the sampling component 42 and is not easy to fall off. The structural design is reasonable and does not require additional operation.

[0027] Through the above technical solution, the sampling component 42 and the drilling component 41 of the drill bit group 4 can realize the state switching of the sampling component 42 and the drilling component 41 through the cooperation of the movable ratchet assembly 44 and the limiting tooth part 45. When the drilling component 41 is rotated out in the opposite direction after drilling, it can drive the movable tightening component 43 to move by relative rotation with the sampling component 42, and make the movable tightening part 421 of the sampling component 42 tighten and clamp the sample, so as to increase the friction force in the sampling process, make the sample not easy to fall off, and make the structure simpler and easier to operate.

[0028] In one embodiment, the inner diameter of the movable tightening member 43 gradually changes along the axial direction, and the outer diameter of the movable tightening portion 421 gradually changes along the axial direction. The gradual change direction of the inner diameter of the movable tightening member 43 from large to small is consistent with the gradual change direction of the outer diameter of the movable tightening portion 421 from large to small. When the movable tightening member 43 is in the tightening and unlocking position, it is located at the tail end of the movable tightening portion 421.

[0029] The movable tightening piece 43 is a set structure, and the inner diameter of its inner cavity wall is gradually set along the axial direction, that is, the inner surface is a conical surface, with a larger diameter at one end and a smaller diameter at the other end. At the same time, the outer diameter of the movable tightening part 421 is also gradually set, and the gradual change direction of the inner diameter of the movable tightening piece 43 from large to small is consistent with the gradual change direction of the outer diameter of the movable tightening part 421 from large to small, so that a taper fit can be formed and used for extrusion and tightening, and when the movable tightening piece 43 moves from bottom to top, since the outer diameter of the movable tightening part 421 gradually increases or decreases from bottom to top, the movable tightening piece 43 can gradually squeeze the movable clamping jaw 4211 to deform it inward, thereby achieving clamping of the sample.

[0030] Furthermore, in order to facilitate the movable tightening member 43 to move better between the sampling member 42 and the drilling member 41, the thickness of the movable tightening portion 421 is smaller than the thickness of the main body of the sampling member 42, so as to form an active cavity 413 for the movable tightening member 43 to move axially between the movable tightening portion 421 and the drilling member 41. In this way, the movable tightening member 43 can move up and down more conveniently in the active cavity 413. Of course, when the movable tightening member 43 moves to the limit position, the friction between the sampling member 42 and the drilling member 41 will be increased, and the sampling member 42 and the drilling member 41 will be stopped in the circumferential direction, which can further maintain the stability of the internal sample during the process of screwing out the drilling hole.

[0031] In order to better realize the axial movement and circumferential stopping of the movable tightening member 43, further, the outer wall of at least one movable clamping claw 4211 of the movable tightening part 421 is provided with a guide rib 4212 along a first direction parallel to the axial direction, and the inner wall of the movable tightening member 43 is provided with a guide groove 431 that slides with the guide rib 4212.

[0032] In the specific implementation process, the bottom end of the drilling member 41 is provided with a shielding flange 411 extending radially inward, and the inner diameter of the shielding flange 411 is less than or equal to the inner diameter of the bottom end of the movable tightening part 421 in the free state. In this way, the gap between the movable tightening part 421, the movable tightening part 43 and the drilling member 41 can be shielded to prevent gravel or soil from entering the gap.

[0033] In order to facilitate the removal of samples, the movable ratchet assembly 44 cooperates with the limiting tooth portion 45 to allow the drilling member 41 to have a third state. In the third state, the drilling member 41 can only rotate along a second direction relative to the sampling member 42, and the second direction is opposite to the first direction.

[0034] The drilling member 41 has a third state through the adjustment of the movable ratchet assembly 44. In the third state, the drilling member 41 can only rotate in a second direction opposite to the first direction. Since the movable tightening member 43 rotates in the first direction when tightened, on the contrary, the reverse rotation of the drilling member 41 can be achieved by driving the outer sleeve rod 32 in the reverse direction through the driving mechanism 2, and the movable tightening member 43 can be switched to the unlocking position, which makes it easier to remove the sample from the sampling member 42.

[0035] In a preferred embodiment of the movable ratchet assembly 44, Figure 6 and Figure 7 As shown, the movable ratchet assembly 44 includes a limiting rod 442, a first spring 444, a transmission cam 443 and a shifting rod 441. The limiting rod 442 is provided with two and is rotatably arranged on the inner wall of the drilling member 41. The limiting rod 442 has a limiting portion that engages with the limiting tooth portion 45. The two limiting rods 442 are respectively engaged with the two sides of the limiting tooth portion 45 through the limiting portions. A transmission cam 443 is provided between the two limiting rods 442. The transmission cam 443 is used to drive the limiting portion of the limiting rod 442 away from the limiting tooth portion 45. A first spring 444 is provided between the limiting rod 442 and the inner wall of the drilling member 41 to drive the limiting rod 442 close to the limiting tooth portion 45. The shifting rod 441 is provided outside the sampling member 42 and is connected to the transmission cam 443 through a rotating shaft.

[0036] In this way, the operator can rotate the transmission cam 443 by rotating the lever 441 on the outside of the drilling component 41, and the convex portion of the transmission cam 443 can be rotated to either side. When rotating to one side, the limiting rod 442 on that side will be away from the limiting tooth portion 45, so that the limiting portion of the limiting rod 442 and the limiting tooth portion 45 can be released from engagement, and then for the limiting rod 442 on that side, the drilling component 41 can rotate freely, and when the transmission cam 443 rotates to the other side, the limiting portion of the limiting rod 442 on that side and the limiting tooth portion 45 will also be released from the limiting relationship; but through elastic members such as springs The setting of 52 can make the transmission cam 443 rotate to one side and release the limit rod 442 on that side. The limit rod 442 on the other side will mesh with the limit tooth portion 45 under the action of the first spring 444 because it is not abutted by the convex part of the transmission cam 443. At this time, the drilling component 41 realizes unidirectional limitation, such as limitation in the first direction, and conversely, limitation in the second direction can be realized; when the transmission cam 443 is centered and does not contact the limit rods 442 on both sides, the limit parts of the limit rods 442 on both sides are engaged with the limit tooth portion 45. At this time, the drilling component 41 and the sampling component 42 are stopped in the circumferential direction.

[0037] In the embodiments of the present application, Figure 1 and Figure 2 As shown, it also includes a first connecting sleeve 33 which is sleeved on the outer outer rod 32. The outer periphery of the outer outer rod 32 is provided with an axially distributed first sliding tooth portion 35. The inner side of the first connecting sleeve 33 is provided with a second sliding tooth portion, and the second sliding tooth portion is meshed with the first sliding tooth portion 35. The outer outer rod 32 is rotatably connected to the frame 1 through the first connecting sleeve 33. The outer side of the first connecting sleeve 33 is provided with a transmission portion 34, and the transmission portion 34 is transmission-coordinated with the driving mechanism 2 to drive the first connecting sleeve 33 to rotate.

[0038] The first sliding tooth portion 35 on the outer rod 32 can achieve circumferential stop by cooperating with the second sliding tooth portion inside the first connecting sleeve 33, and can then rotate under the drive of the driving mechanism 2. At the same time, it is also convenient for the drill rod assembly 3 including the outer rod 32 to move upward relative to the driving mechanism 2 without interfering with each other, so that the transmission of the drill rod assembly 3 can be achieved through the conventional driving mechanism 2. Since the outer rod 32 is rotatably connected to the frame 1 through the first connecting sleeve 33, the first connecting sleeve 33 and the outer rod 32 can rotate synchronously, and cooperate with the transmission portion 34 on the first connecting sleeve 33 to achieve transmission cooperation with the driving mechanism 2. In the specific implementation process, the transmission portion 34 on the first connecting sleeve 33 is a gear 1, and the gear 1 is fixedly sleeved on the outside of the first connecting sleeve 33. Accordingly, the driving mechanism 2 can use the driving motor 21 to achieve transmission through meshing with the gear 1.

[0039] On this basis, combined with Figure 1 , Figure 4 and Figure 5 As shown, it may also include a driving mechanism 2 6, which is rotatably connected to the inner shaft 31 and drives the drill rod assembly 3 to rise and fall axially. The driving mechanism 2 6 is used to drive the drill rod assembly 3 to rise and fall, and is rotatably connected to the inner shaft 31. When it is necessary to rise and fall, the driving mechanism 2 6 only needs to drive the inner shaft 31 to rise and fall to make the drill rod assembly 3 rise and fall as a whole, so that the transmission can be more carried out through the driving method separated from the driving mechanism 1 2.

[0040] In the specific implementation process, the driving mechanism 2 6 may include a screw 62, a threaded transmission sleeve 63, a connecting rod 64 and a driving motor 2 61. The screw 62 is vertically arranged on the frame 1, and its outer thread sleeve is provided with a threaded transmission sleeve 63. The threaded transmission sleeve 63 is rotatably connected with the inner shaft 31 through the connecting rod 64, and the thread is driven to rotate by the driving motor 2 61. In this way, when the driving motor 2 61 drives the screw 62 to rotate, the threaded transmission sleeve 63 can move up and down along the axis of the screw 62, and then drive the drill rod assembly 3 to rise and fall synchronously. Specifically, a slider is also provided on the other side of the threaded transmission sleeve 63 relative to the connecting rod 64, and is slidably connected with the inner wall of the frame 1 through the slider, so that the lifting activity can be more stable.

[0041] In order to make the drill rod assembly 3 have better centering when drilling to a greater depth, Figure 1 , Figure 4 and Figure 5 As shown, it may also include a guide mechanism 5, which includes a second connecting sleeve 53, a guide member 51 and an elastic member 52. The guide member 51 is slidably connected to the frame 1 along the lifting direction of the drill rod assembly 3. Both ends of the guide member 51 are rotatably connected to the second connecting sleeve 53 sleeved on the outside of the outer sleeve rod 32. The inner wall of the second connecting sleeve 53 is provided with a third sliding tooth portion along the circumferential direction. The third sliding tooth portion cooperates with the first sliding tooth portion 35. The outer sleeve of the guide member 51 is provided with an elastic member 52, and the bottom of the elastic member 52 abuts against the lifting frame.

[0042] The guide member 51 of the guide mechanism 5 is slidably matched with the frame 1, for example, it slides through the mounting plate 13 on the frame 1, and the two ends of the guide member 51 are respectively rotatably connected to the second connecting sleeve 53, and the second connecting sleeve 53 is meshed with the first sliding tooth portion 35 of the outer rod 32 through the third sliding tooth portion, so that the second connecting sleeve 53 can be stopped in the circumferential direction with the outer rod 32 but can slide relatively in the longitudinal direction, and the guide member 51 rotatably connected to the second connecting sleeve 53 can also slide up and down and stop in the circumferential direction at the same time. In this way, when the outer rod 32 rotates, the guide member 51 is stopped in the circumferential direction but can slide up and down, so that when the drill rod assembly 3 starts to drill downward, the guide member 51 can not rise and fall with the drill rod assembly 3 through the spring, but the guide member 51 moves relatively to the outer rod When the drill rod assembly 3 reaches the upper limit position 32, the descent of the drill rod assembly will drive the guide assembly to descend at the same time. At this time, the elastic member 52 is compressed at the same time, and the guide member 51 can provide guidance and centering for the lifting and lowering of the drill rod assembly 3 by sliding with the frame 1. When it descends to a greater depth, the guide member 51 also descends to the limit position. At this time, the guide member 51 can provide guidance and centering for the drill rod assembly 3, so that the drill rod assembly 3 remains centered for more accurate drilling. When the drill rod assembly 3 is screwed out after sampling, it gradually moves upward, and the guide member 51 is gradually reset by the spring in the stored force state, so that it can be flexibly guided, and the guiding and centering effects are better, which solves the problem that the longer drill rod assembly 3 cannot be guided and centered when drilling at a greater depth.

[0043] In the embodiments of the present application, Figure 1-Figure 4 As shown, the frame 1 includes a base 12, a frame body 11 and a driving mechanism 3 7, the base 12 is provided with a channel running through from top to bottom for the drill rod assembly 3 to pass through, the base 12 is provided with a first threaded transmission part 121 distributed along the circumferential direction, the frame body 11 is provided with a second threaded transmission part 111 distributed along the circumferential direction, the first threaded transmission part 121 is threadedly matched with the second threaded transmission part 111, and the driving mechanism 3 7 is transmission-connected with the frame body 11 to drive the frame body 11 to rotate.

[0044] The frame 1 can be lifted and lowered, and the height adjustment of the drill rod assembly 3 can be facilitated by lifting and lowering, so as to make preliminary adjustment, and the lifting and lowering of the driving mechanism 2 6 can realize the adjustment of a higher height, which is more convenient. The channel inside the base 12 can facilitate the storage and passage of the drill rod assembly 3 and the drill bit group 4. The base 12 is provided with a first thread transmission part 121, which is an annular structure extending upward, and an external thread 122 is arranged on its outer periphery, and the frame body 11 is provided with a downward annular flange to form a cover-like structure, and the annular flange is used as the second thread transmission part 111, and an internal thread 113 is arranged on its inner side circumferentially, and the internal thread 113 is threadedly matched with the external thread 122, so that a connection structure that can be lifted and lowered can be formed, and at the same time, the driving mechanism 3 7 can be driven by the gear and the fourth sliding tooth part 112 of the outer wall of the second thread transmission part 111, and the fourth sliding tooth part 112 distributed along the axial direction can realize lifting and lowering while the driving mechanism 3 7 is stationary, and can also rotate.

[0045] In order to achieve dust reduction, a water tank 124 is provided in the base 12, and the water tank 124 is connected to a spray device 125 provided on the circumferential inner wall of the channel of the base 12 through a delivery pipeline. The spray device 125 includes an annular mounting bracket and a plurality of spray heads circumferentially arranged on the circumference of the mounting bracket, each spray head is connected to a delivery pipeline, and the delivery pipeline is connected to the water tank 124 through a water pump, so that spraying can be performed, and dust in the air during drilling can be reduced by spraying.

[0046] Specifically, the base 12 is also provided with a plurality of chambers with hatches 123, through which devices such as a water tank 124 and a driving mechanism 7 can be installed, and a notch is provided on one side of the base 12, and a transparent protective door 126 is provided in the notch, through which an operator can conveniently enter to take out samples.

[0047] The above are only preferred embodiments of the present invention. It should be noted that the above preferred embodiments should not be regarded as limiting the present invention, and the protection scope of the present invention should be based on the scope defined by the claims. For ordinary technicians in this technical field, several improvements and modifications can be made without departing from the spirit and scope of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A rock drilling sampling device for highway construction, characterized in that: include: frame; A drill rod assembly is arranged on the frame, the drill rod assembly comprises an inner shaft and an outer shaft, and the inner shaft is rotatably sleeved with the outer shaft; A driving mechanism for at least driving the outer sleeve to rotate; A drill bit assembly connected to the drill rod assembly, the drill bit assembly comprising a sampling component, a drilling component and a movable tightening member, the drilling component is hollow inside, the sampling component is rotatably sleeved in the drilling component and fixedly connected to the inner shaft rod, the drilling component is fixedly connected to the outer sleeve rod, a limiting tooth portion distributed circumferentially around the inner shaft rod is provided between the sampling component and the inner shaft rod, a movable ratchet assembly meshing with the limiting tooth portion is provided in the drilling component, the movable ratchet assembly cooperates with the limiting tooth portion to enable the drilling component to have at least a first state and a second state, and in the first state the drilling component The component and the sampling component are stopped in the circumferential direction, and in the second state, the drilling component can only rotate along the first direction relative to the sampling component; the sampling component has a movable tightening part, and the movable tightening part includes movable jaws in a petal shape and distributed at intervals along the circumferential direction; the movable tightening part is movably sleeved on the outside of the movable tightening part and stopped in the circumferential direction, and the movable tightening part is threadedly matched with the inner wall of the drilling component to enable the movable part to switch axially between the tightening position and the tightening release position, and when the movable tightening part is in the tightening position, the gap between the movable jaws is reduced and enclosed inward to clamp the sample.

2. A highway construction rock drilling sampling device as claimed in claim 1, characterized in that: The inner diameter of the movable tightening piece gradually changes along the axial direction, and the outer diameter of the movable tightening part gradually changes along the axial direction. The gradual change direction of the inner diameter of the movable tightening piece from large to small is consistent with the gradual change direction of the outer diameter of the movable tightening part from large to small. When the movable tightening piece is in the tightening and unlocking position, it is located at the tail end of the movable tightening part.

3. A highway construction rock drilling sampling device as claimed in claim 2, characterized in that: The thickness of the movable tightening part is smaller than the thickness of the main body of the sampling member, so as to form an active cavity for the movable tightening member to move axially between the movable tightening part and the drilling member.

4. A highway construction rock drilling sampling device as claimed in claim 2, characterized in that: The outer wall of at least one movable clamping claw of the movable tightening part is provided with a guide rib along a first direction parallel to the axial direction, and the inner wall of the movable tightening member is provided with a guide groove which is slidably matched with the guide rib.

5. A highway construction rock drilling sampling device as claimed in claim 1, characterized in that: The movable ratchet assembly cooperates with the limiting tooth portion to enable the drilling member to have a third state. In the third state, the drilling member can only rotate along a second direction relative to the sampling member, and the second direction is opposite to the first direction.

6. A highway construction rock drilling sampling device as claimed in claim 1, characterized in that: The movable ratchet assembly includes a limit rod, a first spring, a transmission cam and a shift rod. The limit rod is provided with two and is rotatably arranged on the inner wall of the drilling component. The limit rod has a limit portion that meshes with the limit tooth portion. The two limit rods are respectively engaged with the two sides of the limit tooth portion through the limit portions. A transmission cam is provided between the two limit rods. The transmission cam is used to drive the limit portion of the limit rod away from the limit tooth portion. A first spring is provided between the limit rod and the inner wall of the drilling component to drive the limit rod close to the limit tooth portion. The shift rod is provided outside the sampling component and is connected to the transmission cam through a rotating shaft.

7. A highway construction rock drilling sampling device as claimed in claim 1, characterized in that: It also includes a first connecting sleeve sleeved on the outer outer rod, the outer periphery of the outer outer rod is provided with an axially distributed first sliding tooth portion, the inner side of the first connecting sleeve is provided with a second sliding tooth portion, the second sliding tooth portion is meshed with the first sliding tooth portion, the outer outer rod is rotatably connected to the frame through the first connecting sleeve, a transmission portion is provided on the outer side of the first connecting sleeve, and the transmission portion is in transmission cooperation with the driving mechanism to drive the first connecting sleeve to rotate.

8. A highway construction rock drilling sampling device as claimed in claim 7, characterized in that: It also includes a second driving mechanism, which is rotatably connected to the inner shaft and drives the drill rod assembly to rise and fall along the axial direction.

9. A highway construction rock drilling sampling device as claimed in claim 8, characterized in that: The guide mechanism also includes a second connecting sleeve, a guiding member and an elastic member. The guiding member is slidably connected to the frame along the lifting direction of the drill rod assembly. Both ends of the guiding member are rotatably connected to the second connecting sleeve sleeved on the outside of the outer sleeve rod. The inner wall of the second connecting sleeve is provided with a third sliding tooth portion along the circumferential direction. The third sliding tooth portion cooperates with the first sliding tooth portion. The outer sleeve of the guide member is provided with an elastic member, and the bottom of the elastic member abuts against the lifting frame.

10. A highway construction rock drilling sampling device as claimed in claim 1, characterized in that: The frame includes a base, a frame body and a third driving mechanism. The base is provided with a channel that passes through from top to bottom for the drill rod assembly to pass through. The base is provided with a first threaded transmission part distributed along the circumferential direction. The frame body is provided with a second threaded transmission part distributed along the circumferential direction. The first threaded transmission part is threadedly matched with the second threaded transmission part. The third driving mechanism is connected to the frame body in a transmission manner to drive the frame body to rotate.

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