A core sampling device for pavement construction

Abstract

The present invention relates to the field of road construction inspection, and particularly relates to a core sampling device for pavement construction, a moving mechanism for a mobile device, and a power mechanism for providing power for drilling. The power mechanism is installed at the lifting end of the moving mechanism, and the power output end of the power mechanism is installed with a drill bit assembly. The device further includes an adjusting mechanism and a cooperating mechanism for cooperating with the drill bit assembly to improve the drilling effect and assisting in core sampling after core sampling is completed. The adjusting mechanism is installed at the inner bottom of the drill bit assembly, the cooperating mechanism is installed on the adjusting mechanism, and a release groove is provided at the position of the drill bit assembly corresponding to the cooperating mechanism. A pressing assembly for driving the adjusting mechanism to lift is provided between the top of the adjusting mechanism and the power mechanism. After the adjusting mechanism is lifted, it drives the cooperating mechanism to adjust its state, so as to solve the technical problems of drill bit expansion due to heat during ground drilling and deviation of the equipment during drilling due to vibration, resulting in drill jamming and affecting the core sampling effect.

Description

Technical Field

[0001] The present invention relates to the field of road construction inspection, and particularly relates to a core sampling device for pavement construction. Background Art

[0002] A core sampling device for road construction is a device specifically used to drill cylindrical core samples from road structural layers (including pavement, base course, subgrade, etc.). Its purpose is to obtain samples of the internal structure of the road in order to detect and analyze road materials, structure, construction quality, etc. It consists of components such as a power device and a drilling assembly;

[0003] In the prior art, Chinese invention with publication number CN117780282B discloses a core sampling device and core sampling method for geological exploration. The annular plate will first come into contact with hard objects and stop rotating, causing the drill barrel to disconnect from the annular plate to avoid accidental injury. However, it is found in the actual drilling process that if a double-layer structure is adopted, due to heat accumulation, it is also possible for the inner cylinder and the outer cylinder to become stuck. And during the drilling process, when the ground is hard, the equipment will vibrate due to difficult drilling. After the equipment deviates, the drill bit will become stuck, affecting the core sampling effect. Summary of the Invention

[0004] The present invention provides a core sampling device for pavement construction to solve the technical problems that during core sampling on the ground, the drill bit expands due to heat, and the equipment deflects due to vibration during the drilling process, resulting in drill bit jamming and affecting the core sampling effect.

[0005] The core sampling device for pavement construction of the present invention adopts the following technical solutions: It includes a moving mechanism for moving the equipment and a power mechanism for providing power for drilling. The power mechanism is installed at the lifting end of the moving mechanism, and the power output end of the power mechanism is installed with a drill bit assembly. It also includes an adjusting mechanism and a cooperating mechanism for cooperating with the drill bit assembly to improve the drilling effect and assist in core sampling after core sampling is completed. The adjusting mechanism is installed at the bottom inside the drill bit assembly, the cooperating mechanism is installed on the adjusting mechanism, and the drill bit assembly is provided with a release groove corresponding to the position of the cooperating mechanism. A pressing assembly for driving the adjusting mechanism to lift is arranged between the top of the adjusting mechanism and the power mechanism. After the adjusting mechanism lifts, it drives the cooperating mechanism to adjust its state;

[0006] The adjusting mechanism includes an expansion assembly at the bottom and a pressing assembly at the top. The expansion assembly includes an internal adjusting cylinder, which is fitted inside the drill bit sleeve of the drill bit assembly, and the internal adjusting cylinder is a retractable cylindrical structure. After contraction, it drives the cooperating mechanism to contract inward, so that the cooperating mechanism clamps the inner core;

[0007] The matching mechanism includes an adjustment block, which is rotatably connected to the inner adjustment cylinder through a pin shaft and is correspondingly arranged at the position of the release groove.

[0008] Furthermore, the expansion component of the adjustment mechanism further includes a pulling component, which is connected to the top of the inner adjustment cylinder. An inwardly contracting extrusion member is arranged inside the drill bit. The outer end face of the pulling component is in sliding fit with the inwardly contracting extrusion member. Vent holes are formed on the inner adjustment cylinder, corresponding to the position of the adjustment block.

[0009] Furthermore, the pressing component of the adjustment mechanism includes a pressure plate and a connecting rod. The pressure plate is arranged at the top of the drill bit sleeve, and the drill rod of the power mechanism penetrates and is slidably connected to the pressure plate. Four connecting rods are arranged at the bottom of the pressure plate, and the connecting rods penetrate the top of the drill bit sleeve and are connected to the pulling component located inside the drill bit sleeve.

[0010] Furthermore, the pulling component includes a compression end and a deformation end. The compression end is a ring, and the deformation end is a cross-bar structure arranged in a ring shape.

[0011] Furthermore, the inwardly contracting extrusion member is used to squeeze the top of the inner adjustment cylinder to contract inward when the inner adjustment cylinder rises, so that the inner adjustment cylinder forms a conical barrel shape. The inwardly contracting extrusion member is a ring with a chamfer at the bottom.

[0012] Furthermore, the outer cross-section of the adjustment block is an arc structure. An extrusion block for supporting the flipping of the adjustment block is arranged at the inner bottom of the release groove. The adjustment block is provided with a chamfer corresponding to the cross-section of the extrusion block.

[0013] Furthermore, the top of the outer end face of the adjustment block is provided with a fillet.

[0014] Furthermore, a support spring is arranged between the pressure plate and the drill bit sleeve, and the support spring is sleeved outside the drill rod.

[0015] Furthermore, the diameter of the pulling component in the initial state is smaller than the diameter of the top of the inner adjustment cylinder in the initial state.

[0016] Furthermore, a gap is arranged between the bottom of the inner adjustment cylinder and the bottom of the drill bit sleeve. An alloy drill bit is arranged at the bottom of the drill bit sleeve, and the width of the alloy drill bit is equal to the wall thickness of the drill bit sleeve plus the wall thickness of the inner adjustment cylinder.

[0017] The beneficial effects of the present invention are as follows: Through the cooperation of the adjustment mechanism and the cooperation mechanism, when drilling down, the cooperation mechanism extends outwards, and multiple cooperation mechanisms form a spiral structure, which can improve the chip removal ability during the drilling process and stir the cooling water, thereby enhancing the cooling effect of the cooling water on the drill bit. When a stuck drill situation occurs, combined with the anti-stuck drill function of the existing equipment power mechanism and the up-and-down movement of the adjustment mechanism, the cooperation mechanism can be transformed into a straight state to avoid drill sticking. When the inner core needs to be taken out, by lifting the drill bit assembly, the adjustment mechanism can be used to squeeze the cooperation mechanism to shrink and clamp the inner core, thus facilitating the removal of the inner core. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0019] Figure 1 Structural schematic diagram of an embodiment of a core sampling device for road construction according to the present invention;

[0020] Figure 2 Structural schematic diagram of the drill bit sleeve of an embodiment of a core sampling device for road construction according to the present invention;

[0021] Figure 3 Structural schematic diagram of the initial state of the adjustment block of an embodiment of a core sampling device for road construction according to the present invention;

[0022] Figure 4 Structural schematic diagram of the down-drilling state of the adjustment block of an embodiment of a core sampling device for road construction according to the present invention;

[0023] Figure 5 Structural schematic diagram of the retracted state of the adjustment block of an embodiment of a core sampling device for road construction according to the present invention;

[0024] Figure 6 Structural schematic diagram of the internal adjustment cylinder of an embodiment of a core sampling device for road construction according to the present invention;

[0025] Figure 7 Structural schematic diagram of the retracted extrusion member of an embodiment of a core sampling device for road construction according to the present invention;

[0026] Figure 8 Structural schematic diagram of the overall adjustment mechanism of an embodiment of a core sampling device for road construction according to the present invention;

[0027] Figure 9Overall front view of the adjustment mechanism of an embodiment of a core sampling device for road construction according to the present invention;

[0028] Figure 10 Top view of the initial state of the adjustment block of an embodiment of a core sampling device for road construction according to the present invention;

[0029] Figure 11 Top view of the under-drilling state of the adjustment block of an embodiment of a core sampling device for road construction according to the present invention;

[0030] Figure 12 Top view of the retracted state of the adjustment block of an embodiment of a core sampling device for road construction according to the present invention;

[0031] Figure 13 Schematic diagram of the support spring structure of an embodiment of a core sampling device for road construction according to the present invention.

[0032] In the figure: 1. Moving mechanism; 2. Power mechanism; 3. Drill bit assembly; 4. Adjustment mechanism; 5. Pressing assembly; 6. Matching mechanism; 21. Drill pipe; 31. Drill bit sleeve; 32. Tungsten carbide drill bit; 33. Release groove; 41. Pressure plate; 42. Connecting rod; 43. Internal adjustment cylinder; 44. Vent hole; 45. Pulling assembly; 46. Retracting extrusion part; 47. Support spring; 61. Adjustment block; 62. Extrusion block. Detailed implementation manners

[0033] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0034] An embodiment of a core sampling device for road construction according to the present invention, as Figures 1 to 13 shown, includes a moving mechanism 1 for moving the device and a power mechanism 2 for providing power for drilling. The power mechanism 2 is installed at the lifting end of the moving mechanism 1, and the power output end of the power mechanism 2 is installed with a drill bit assembly 3. It also includes an adjustment mechanism 4 and a matching mechanism 6 for cooperating with the drill bit assembly 3 to improve the drilling effect and assisting in core sampling after core sampling is completed. The adjustment mechanism 4 is installed at the bottom inside the drill bit assembly 3, the matching mechanism 6 is installed on the adjustment mechanism 4, and a release groove 33 is provided at the position of the drill bit assembly 3 corresponding to the matching mechanism 6. A pressing assembly 5 for driving the adjustment mechanism 4 to lift is arranged between the top of the adjustment mechanism 4 and the power mechanism 2. After the adjustment mechanism 4 is lifted, it drives the matching mechanism 6 to adjust the state;

[0035] The adjusting mechanism 4 includes an expansion component at the bottom and a pressing component at the top. The expansion component includes an internal adjusting cylinder 43 which is fitted inside the drill bit sleeve 31 of the drill bit component 3. The internal adjusting cylinder 43 is a retractable cylindrical structure. After contraction, it drives the matching mechanism 6 to contract inward, so that the matching mechanism 6 clamps the inner core.

[0036] The matching mechanism 6 includes an adjusting block 61. The adjusting block 61 is rotatably connected to the internal adjusting cylinder 43 through a pin shaft and is correspondingly arranged at the position of the release groove 33, so as to facilitate the passage of cooling water for cooling and the debris during the processing.

[0037] Furthermore, the expansion component of the adjusting mechanism 4 further includes a pulling component 45. The pulling component 45 is connected to the top of the internal adjusting cylinder 43. An inward shrinking and squeezing part 46 is arranged inside the drill bit 31. The outer end face of the pulling component 45 is in sliding fit with the inward shrinking and squeezing part 46. Vent holes 44 are formed on the internal adjusting cylinder 43, and the vent holes 44 correspond to the position of the adjusting block 61.

[0038] Furthermore, the pressing component of the adjusting mechanism 4 includes a pressure plate 41 and a connecting rod 42. The pressure plate 41 is arranged on the top of the drill bit sleeve 31, and the drill rod 21 of the power mechanism 2 passes through and is slidably connected to the pressure plate 41. Four connecting rods 42 are arranged at the bottom of the pressure plate 41. The connecting rods 42 pass through the top of the drill bit sleeve 31 and are connected to the pulling component 45 located inside the drill bit sleeve 31.

[0039] Furthermore, the pulling component 45 includes a compression end and a deformation end. The compression end is a ring, and the deformation end is an annular cross-bar structure. In this embodiment, the deformation end of the pulling component is a V-shaped rod connected end to end, so as to provide clearance and deformation by using its toughness.

[0040] Furthermore, the inward shrinking and squeezing part 46 is used to squeeze the top of the internal adjusting cylinder 43 to shrink inward when the internal adjusting cylinder 43 rises, so that the internal adjusting cylinder 43 forms a conical cylinder shape. The inward shrinking and squeezing part 46 is a ring with a chamfer at the bottom. After forming the conical cylinder shape, the adjusting block 61 can be contracted inward.

[0041] Furthermore, the outer end face of the adjusting block 61 is an arc structure. An extrusion block 62 for supporting the flipping of the adjusting block 61 is arranged at the inner bottom of the release groove 33. The adjusting block 61 is provided with a chamfer corresponding to the cross-section of the extrusion block 62.

[0042] Furthermore, the top of the outer end face of the adjusting block 61 is provided with a fillet.

[0043] Furthermore, a support spring 47 is arranged between the pressure plate 41 and the drill bit sleeve 31. The support spring 47 is sleeved outside the drill rod 21.

[0044] Furthermore, the diameter of the pulling assembly 45 in an initial state is smaller than the diameter of the top of the internal adjustment cylinder 43 in an initial state.

[0045] Furthermore, a gap is provided between the bottom of the internal adjustment tube 43 and the bottom of the drill sleeve 31 , and an alloy drill bit 32 is provided at the bottom of the drill sleeve 31 . The width of the alloy drill bit 32 is equal to the wall thickness of the drill sleeve 31 plus the wall thickness of the internal adjustment tube 43 .

[0046] Working principle: According to the needs of core drilling, the equipment is adjusted to select the appropriate size. After starting the equipment, due to the matching gap between the workpieces, the drill sleeve 31 is first pressed on the ground, and the motor of the power mechanism 2 is started. After the motor is started, the drill sleeve 31 and the alloy drill bit 32 are driven to rotate and drill. At the same time, the drill sleeve 31 is drilled downward by controlling the power mechanism 2;

[0047] like Figure 2 As shown, when drilling downward, the ground resistance is not large at the start, and the pressure of the pressing assembly 5 on the pressure plate 41 is not large when the drill sleeve 31 and the alloy drill bit 32 are drilling. At this time, the internal adjustment cylinder 43 is not pressed downward, and when the drilling depth gradually increases, the resistance becomes greater and greater, and the power mechanism 2 drives the pressing assembly 5 to exert greater pressure on the pressure plate 41. The pressure plate 41 drives the internal adjustment cylinder 43 to press down through the connecting rod 42 and the pulling assembly 45. At this time, the internal adjustment cylinder 43 drives the adjustment block 61 to move downward. During the downward movement of the adjustment block 61, it is blocked by the side extrusion block 62. At the same time, because the internal adjustment cylinder 43 is Figure 6 The middle structure will also expand outwards, and the adjustment block 61 will expand outwards after turning over to form an inclined form. Multiple adjustment blocks 61 cooperate to form a spiral structure ( Figures 3 to 4 );

[0048] At this time, the cooling water provided by the power mechanism 2 slowly seeps out from the inside of the drill sleeve 31 through the air holes 44 and the release groove 33, and then driven by the adjustment block 61 to effectively cool the drill sleeve 31 and the alloy drill bit 32. In addition, due to the outward expansion of the adjustment block 61, there is a gap between the concrete and the drill sleeve 31, and because the internal adjustment cylinder 43 has toughness, the adjustment block 61 produces friction and vibration.

[0049] When the alloy drill bit 32 suddenly encounters a large resistance, since the motor of the power mechanism 2 has an anti-stuck function (a function of existing impact drills), the pressing assembly 5 and the drill rod 21 will jump, and the internal adjustment cylinder 43 will lose a large pressure. The pulling assembly 45 and the support spring 47 will cause the internal adjustment cylinder 43 to jump up and down. At this time, the adjustment block 61 becomes Figure 3 The state is that the adjustment block 61 and the internal adjustment tube 43 cooperate to prevent the drill sleeve 31 from getting stuck, and the drilling is slowly performed until the area is passed;

[0050] During the drilling process, due to the continuous vibration of the equipment itself, the position of the drill bit sleeve 31 may shift. Under normal conditions, it may get stuck due to the shift. At this time, during the drilling process when the drill bit sleeve 31 and the adjusting block 61 cooperate, the virtual size of the adjusting block 61 is larger than that of the drill bit sleeve 31, so there is a gap between the concrete and the adjusting block 61. Even if the drill bit sleeve 31 undergoes a lateral shift or a rotational shift, it can be slightly corrected in a timely manner through the collision between the adjusting block 61 and the concrete. Even if there is a shift, the gap is sufficient for the shift amount to avoid getting stuck;

[0051] After the drilling is completed, the drill bit sleeve 31 is lifted upward. At this time, the power mechanism 2 drives the drill pipe 21 and the pressing assembly 5 to move upward. Since the pressing assembly 5 rises more than the drill pipe 21, at this time, the pressing assembly 5 drives the internal adjusting cylinder 43 to move upward through the pressure plate 41, the connecting rod 42, the retracting extrusion part 46, and the pulling assembly 45. The pulling assembly 45 retracts under the extrusion of the retracting extrusion part 46, and at the same time drives the adjusting block 61 on the internal adjusting cylinder 43 to retract, clamping the inner core tightly, then the inner core is taken out together. After taking it out, just slightly lift the drill bit sleeve 31, and the internal adjusting cylinder 43 moves downward by a part, and the internal adjusting cylinder 43 can loosen the inner core, facilitating the removal of the inner core.

[0052] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A core sampling device for pavement construction, comprising a moving mechanism for moving the device and a power mechanism for providing power for drilling. The power mechanism is installed at the lifting end of the moving mechanism, and a drill bit assembly is installed at the power output end of the power mechanism. It is characterized in that: It also includes an adjustment mechanism and a cooperation mechanism for cooperating with the drill bit assembly to improve the drilling effect and assist in core sampling after core sampling is completed. The adjustment mechanism is installed at the inner bottom of the drill bit assembly, the cooperation mechanism is installed on the adjustment mechanism, and a release groove is provided at the position of the drill bit assembly corresponding to the cooperation mechanism. A pressing assembly for driving the adjustment mechanism to lift is provided at the top of the adjustment mechanism. After the adjustment mechanism lifts, it drives the cooperation mechanism to adjust its state; The adjustment mechanism includes an expansion assembly at the bottom and a pressing assembly at the top. The expansion assembly includes an inner adjustment cylinder, which is fitted inside the drill bit sleeve of the drill bit assembly, and the inner adjustment cylinder is a retractable cylindrical structure. After contraction, it drives the cooperation mechanism to contract inward, so that the cooperation mechanism clamps the inner core; The cooperation mechanism includes an adjustment block, and the adjustment block is rotatably connected to the inner adjustment cylinder through a pin shaft and is correspondingly arranged at the position of the release groove; The outer section of the adjustment block is an arc structure. An extrusion block for supporting the flipping of the adjustment block is provided at the inner bottom of the release groove. A chamfer is provided at the section of the adjustment block corresponding to the extrusion block, and a fillet is provided at the top of the outer end face of the adjustment block; The pressing assembly of the adjustment mechanism includes a pressure plate and a connecting rod. The pressure plate is arranged at the top of the drill bit sleeve, and the drill rod of the power mechanism passes through and is slidably connected to the pressure plate. Four connecting rods are provided at the bottom of the pressure plate, and the connecting rods pass through the top of the drill bit sleeve and are connected to a pulling assembly located inside the drill bit sleeve; A support spring is provided between the pressure plate and the drill bit sleeve, and the support spring is sleeved outside the drill rod; When the drilling depth gradually increases, the resistance becomes greater and greater, and the power mechanism drives the pressing assembly to apply a greater and greater pressure to the pressure plate; after drilling is completed, the drill bit sleeve is lifted upward, and the power mechanism drives the drill rod and the pressing assembly to move upward.

2. The core sampling device for pavement construction according to claim 1, characterized in that: The expansion assembly of the adjustment mechanism further includes a pulling assembly. The pulling assembly is connected to the top of the inner adjustment cylinder. An inner contraction extrusion part is provided inside the drill bit sleeve. The outer end face of the pulling assembly is slidably matched with the inner contraction extrusion part. Vent holes are formed on the inner adjustment cylinder corresponding to the position of the adjustment block.

3. The core sampling device for pavement construction according to claim 2, characterized in that: The pulling assembly includes a compression end and a deformation end. The compression end is a ring, and the deformation end is a cross-bar structure arranged in a ring shape.

4. The core sampling device for pavement construction according to claim 3, characterized in that: The inner contraction extrusion part is used to squeeze the top of the inner adjustment cylinder to contract inward when the inner adjustment cylinder rises, so that the inner adjustment cylinder forms a conical barrel shape. The inner contraction extrusion part is a ring with a chamfer provided at the bottom.

5. The core sampling device for pavement construction according to claim 4, characterized in that: The diameter of the pulling assembly in the initial state is smaller than the diameter of the top of the inner adjustment cylinder in the initial state.

6. The core sampling device for pavement construction according to claim 1, characterized in that: A gap is provided between the bottom of the inner adjustment cylinder and the bottom of the drill bit sleeve. An alloy drill bit is provided at the bottom of the drill bit sleeve, and the width of the alloy drill bit is equal to the wall thickness of the drill bit sleeve plus the wall thickness of the inner adjustment cylinder.

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