Coring device for pavement construction

Abstract

The invention relates to the field of road construction detection, in particular to a coring device for road surface construction, which comprises a moving mechanism for moving equipment and a power mechanism for providing power for drilling, the power mechanism is mounted at the lifting end of the moving mechanism, and a drill bit assembly is mounted at the power output end of the power mechanism. The adjusting mechanism is used for being matched with the drill bit assembly to improve the drilling effect and assisting coring after coring is completed, the adjusting mechanism is installed at the bottom in the drill bit assembly, the matching mechanism is installed on the adjusting mechanism, and a release groove is formed in the position, corresponding to the matching mechanism, of the drill bit assembly; a press-fit assembly for driving the adjusting mechanism to ascend and descend is arranged between the top of the adjusting mechanism and the matched power mechanism, the adjusting mechanism drives the matched mechanism to adjust the state after ascending and descending, and therefore the problems that a drill bit expands due to heating during ground drilling and equipment deflects due to shaking in the drilling process, and drilling tool jamming is caused are solved. And the coring effect is influenced.

Description

Technical Field

[0001] The invention relates to the field of road construction detection, and in particular to a coring device for road construction. Background Art

[0002] The road construction coring device is a device specially used to drill cylindrical core samples from road structure layers (including pavement, base and roadbed, etc.). Its purpose is to obtain samples of the internal structure of the road in order to detect and analyze the road materials, structure and construction quality. It consists of components such as power unit and drilling assembly; In the prior art, a Chinese invention with publication number CN117780282B discloses a geological survey coring device and a coring method, in which an annular plate will first contact a hard object and stop rotating, so that the drill barrel and the annular plate are disconnected to avoid accidental injury. However, in the actual drilling process, it is found that if a double-layer structure is adopted, the inner barrel and the outer barrel may get stuck due to heat accumulation, and during the drilling process, the ground is hard and the equipment will shake due to the difficulty in drilling. After the equipment is offset, the drill bit will get stuck, affecting the coring effect. Summary of the invention

[0003] The present invention provides a coring device for road construction, so as to solve the technical problem that the drill is stuck and the coring effect is affected due to the expansion of the drill bit due to heat and the deflection of the equipment due to shaking during the drilling process when drilling the ground.

[0004] A coring device for road construction of the present invention adopts the following technical scheme: it includes a moving mechanism for moving equipment and a power mechanism for providing power for drilling, the power mechanism is installed at the lifting end of the moving mechanism, a drill bit assembly is installed at the power output end of the power mechanism, and also includes an adjustment mechanism and a matching mechanism for cooperating with the drill bit assembly to improve the drilling effect and assist in coring after coring is completed, the adjustment mechanism is installed at the bottom of the drill bit assembly, the matching mechanism is installed on the adjustment mechanism, and the drill bit assembly is provided with a release groove corresponding to the position of the matching mechanism, a pressing assembly for driving the adjustment mechanism to rise and fall is provided between the top of the adjustment mechanism and the power mechanism, and the adjustment mechanism drives the matching mechanism to adjust the state after it is lifted and lowered; The adjustment mechanism includes an expansion component at the bottom and a pressure component at the top, and the expansion component includes an internal adjustment cylinder, which is arranged in a close fit inside the drill sleeve of the drill assembly, and the internal adjustment cylinder is a retractable cylindrical structure, which drives the matching mechanism to retract inward after contraction, so that the matching mechanism clamps the inner core; The matching mechanism comprises an adjusting block, which is rotatably connected to the internal adjusting cylinder via a pin shaft and is correspondingly arranged at the position of the releasing groove.

[0005] Furthermore, the expansion component of the adjustment mechanism also includes a pulling component, which is connected to the top of the internal adjustment cylinder. An inward-retracting extrusion piece is provided inside the drill bit. The outer end surface of the pulling component is slidably matched with the inward-retracting extrusion piece. An air hole is formed on the internal adjustment cylinder, and the air hole corresponds to the position of the adjustment block.

[0006] Furthermore, the pressure-applying assembly of the adjusting mechanism includes a pressure plate and a connecting rod. The pressure plate is arranged at the top of the drill sleeve, and the drill rod of the power mechanism passes through and is slidably connected to the pressure plate. Four connecting rods are arranged at the bottom of the pressure plate, and the connecting rods pass through the top of the drill sleeve and are connected to the pulling assembly located inside the drill sleeve.

[0007] Furthermore, the pulling assembly includes a pressure-bearing end and a deformation end, the pressure-bearing end is a circular ring, and the deformation end is a cross-rod structure arranged in a ring.

[0008] Furthermore, the inward-retracting extrusion piece is used to squeeze the top of the internal adjustment tube inward when the internal adjustment tube rises, so that the internal adjustment tube forms a conical barrel shape, and the inward-retracting extrusion piece is a circular ring with a chamfered bottom.

[0009] Furthermore, the outward cross section of the adjustment block is an arc structure, and an extrusion block supporting the adjustment block to flip is arranged at the bottom of the release groove, and the adjustment block is chamfered corresponding to the cross section of the extrusion block.

[0010] Furthermore, the top of the outer end surface of the adjustment block is provided with a rounded corner.

[0011] Furthermore, a support spring is provided between the pressure plate and the drill sleeve, and the support spring is sleeved on the outside of the drill rod.

[0012] Furthermore, the diameter of the pulling component in an initial state is smaller than the diameter of the top of the internal adjustment cylinder in an initial state.

[0013] Furthermore, a gap is provided between the bottom of the internal adjustment tube and the bottom of the drill sleeve, an alloy drill bit is provided at the bottom of the drill sleeve, and the width of the alloy drill bit is equal to the wall thickness of the drill sleeve plus the wall thickness of the internal adjustment tube.

[0014] The beneficial effects of the present invention are as follows: the present invention cooperates with the adjusting mechanism and the matching mechanism. When drilling, the matching mechanism extends outward and multiple matching mechanisms form a spiral structure, which can improve the chip removal ability during the drilling process and stir the cooling water to improve the cooling of the drill bit by the cooling water. When the drill is stuck, the anti-drilling function of the power mechanism of the existing equipment and the up and down jumping of the adjusting mechanism are combined to enable the matching mechanism to be transformed into a straight state to avoid drill sticking. When the inner core needs to be removed, the drill bit assembly is lifted, so that the adjusting mechanism can squeeze the matching mechanism inward to clamp the inner core, thereby facilitating the removal of the inner core. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0016] Figure 1 It is a structural schematic diagram of an embodiment of a coring device for road construction of the present invention; Figure 2 A schematic diagram of the drill sleeve structure of an embodiment of a coring device for road construction according to the present invention; Figure 3 It is a schematic structural diagram of an initial state of an adjusting block of an embodiment of a coring device for road construction of the present invention; Figure 4 It is a structural schematic diagram of the adjusting block in the drilling state of an embodiment of a coring device for road construction of the present invention; Figure 5 It is a schematic structural diagram of an adjusting block in a retracted state in an embodiment of a coring device for road construction of the present invention; Figure 6 It is a schematic diagram of the internal adjustment cylinder structure of an embodiment of a coring device for road construction of the present invention; Figure 7 It is a schematic diagram of the structure of the inner shrinkage extrusion member of an embodiment of a coring device for road construction of the present invention; Figure 8 It is a schematic diagram of the overall structure of the adjustment mechanism of an embodiment of a coring device for road construction of the present invention; Fig. 9 It is an overall front view of the adjustment mechanism of an embodiment of a coring device for road construction of the present invention; Fig.10 A top view of an initial state of an adjusting block of an embodiment of a coring device for road construction of the present invention; Fig.11A top view of an adjusting block in a drilling state of an embodiment of a coring device for road construction of the present invention; Fig.12 A top view of an adjusting block in a retracted state of an embodiment of a coring device for road construction of the present invention; Fig.13 The present invention is a schematic diagram of a supporting spring structure of an embodiment of a coring device for road construction according to the present invention.

[0017] In the figure: 1. moving mechanism; 2. power mechanism; 3. drill bit assembly; 4. adjusting mechanism; 5. pressing assembly; 6. matching mechanism; 21. drill rod; 31. drill bit sleeve; 32. alloy drill bit; 33. release groove; 41. pressure plate; 42. connecting rod; 43. internal adjustment cylinder; 44. air vent; 45. pulling assembly; 46. retracted extrusion member; 47. support spring; 61. adjustment block; 62. extrusion block. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] An embodiment of a coring device for road construction according to the present invention is as follows Figures 1 to 13 As shown, it includes a moving mechanism 1 for moving equipment 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 a drill bit assembly 3 is installed at the power output end of the power mechanism 2, and also includes an adjustment mechanism 4 and a matching mechanism 6 used to cooperate with the drill bit assembly 3 to improve the drilling effect and assist in coring after coring is completed, the adjustment mechanism 4 is installed at the bottom of the drill bit assembly 3, the matching mechanism 6 is installed on the adjustment mechanism 4, and the drill bit assembly 3 is provided with a release groove 33 at a position corresponding to the matching mechanism 6, and a pressing assembly 5 for driving the adjustment mechanism 4 to rise and fall is provided between the top of the adjustment mechanism 4 and the power mechanism 2, and the adjustment mechanism 4 drives the matching mechanism 6 to adjust the state after rising and falling; The adjustment mechanism 4 includes an expansion component at the bottom and a pressure component at the top. The expansion component includes an internal adjustment tube 43. The internal adjustment tube 43 is arranged in a close fit inside the drill sleeve 31 of the drill assembly 3. The internal adjustment tube 43 is a retractable tubular structure. After contraction, it drives the matching mechanism 6 to contract inward, so that the matching mechanism 6 clamps the inner core. The matching mechanism 6 includes an adjusting block 61, which 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 cooling of cooling water and the passage of debris during the processing.

[0020] Furthermore, the expansion component of the adjustment mechanism 4 also includes a pulling component 45, which is connected to the top of the internal adjustment cylinder 43. An inward-retracting extrusion component 46 is arranged inside the drill bit 31. The outer end surface of the pulling component 45 slides with the inward-retracting extrusion component 46. An air hole 44 is formed on the internal adjustment cylinder 43, and the air hole 44 corresponds to the position of the adjustment block 61.

[0021] Furthermore, the pressure-applying assembly of the adjusting mechanism 4 includes a pressure plate 41 and a connecting rod 42. The pressure plate 41 is arranged at the top of the drill 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 sleeve 31 and are connected to the pulling assembly 45 located inside the drill sleeve 31.

[0022] Furthermore, the pulling assembly 45 includes a pressure-bearing end and a deformation end. The pressure-bearing end is a circular ring, and the deformation end is a cross-rod structure arranged in a ring. The deformation end of the pulling assembly in this embodiment is a V-shaped rod first connected to provide clearance and deformation by utilizing its toughness.

[0023] Furthermore, the retractable extrusion member 46 is used to squeeze the top of the internal adjustment cylinder 43 inward when the internal adjustment cylinder 43 rises, so that the internal adjustment cylinder 43 forms a conical cylinder shape. The retractable extrusion member 46 is a circular ring with a chamfered bottom. After the conical cylinder shape is formed, the adjustment block 61 can be retracted inward.

[0024] Furthermore, the outward cross section of the adjusting block 61 is an arc structure, and an extrusion block 62 for supporting the adjusting block 61 to flip is provided at the bottom of the release groove 33 , and a chamfer is provided on the cross section of the adjusting block 61 corresponding to the extrusion block 62 .

[0025] Furthermore, a rounded corner is provided on the top of the outer end surface of the adjusting block 61 .

[0026] Furthermore, a support spring 47 is provided between the pressure plate 41 and the drill sleeve 31 , and the support spring 47 is sleeved on the outside of the drill rod 21 .

[0027] 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.

[0028] 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 .

[0029] 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; 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 ( Figure 3 to Figure 4 ); 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. 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; During the drilling process, the position of the drill sleeve 31 may shift due to the continuous vibration of the equipment. Under normal conditions, it may get stuck due to the shift. At this time, because the drill sleeve 31 and the adjustment block 61 cooperate in the drilling process, the virtual size of the adjustment block 61 is larger than the drill sleeve 31, so a gap is generated between the concrete and the adjustment block 61. Even if the drill sleeve 31 shifts laterally or rotates, it can be slightly corrected in time through the collision between the adjustment block 61 and the concrete. Even if there is a shift, the gap is enough to offset the amount to avoid getting stuck. After drilling is completed, the drill sleeve 31 is lifted upwards. At this time, the power mechanism 2 drives the drill rod 21 and the pressing assembly 5 to move upwards. Because the pressing assembly 5 is lifted higher than the drill rod 21, the pressing assembly 5 drives the internal adjustment cylinder 43 to move upwards through the pressure plate 41, the connecting rod 42, the retracted extrusion piece 46, and the pulling assembly 45. The pulling assembly 45 is squeezed and retracted by the retracted extrusion piece 46, and at the same time drives the adjustment block 61 on the internal adjustment cylinder 43 to retract, clamping the inner core, and the inner core is taken out together. After taking it out, you only need to slightly lift the drill sleeve 31, and the internal adjustment cylinder 43 moves downward, and the internal adjustment cylinder 43 can loosen the inner core, which is convenient for taking out the inner core.

[0030] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A coring device for road construction, comprising a moving mechanism for moving equipment and a power mechanism for providing power for drilling, wherein the power mechanism is installed at the lifting end of the moving mechanism, and a drill assembly is installed at the power output end of the power mechanism, characterized in that: It also includes an adjustment mechanism and a matching mechanism for cooperating with the drill bit assembly to improve the drilling effect and assist in coring after coring is completed. The adjustment mechanism is installed at the bottom of the drill bit assembly, and the matching mechanism is installed on the adjustment mechanism. The drill bit assembly is provided with a release groove corresponding to the matching mechanism position. A pressing assembly for driving the adjustment mechanism to rise and fall is provided between the top of the adjustment mechanism and the power mechanism. After the adjustment mechanism rises and falls, it drives the matching mechanism to adjust its state; The adjustment mechanism includes an expansion component at the bottom and a pressure component at the top, and the expansion component includes an internal adjustment cylinder, which is arranged in a close fit inside the drill sleeve of the drill assembly, and the internal adjustment cylinder is a retractable cylindrical structure, which drives the matching mechanism to retract inward after contraction, so that the matching mechanism clamps the inner core; The matching mechanism includes an adjustment block, which is rotatably connected to the internal adjustment cylinder via a pin and is arranged at a position corresponding to the release slot; The outward cross section of the adjustment block is an arc structure, an extrusion block supporting the adjustment block to flip is arranged at the bottom of the release groove, the adjustment block is chamfered corresponding to the cross section of the extrusion block, and the top of the outward end surface of the adjustment block is rounded.

2. A coring device for road construction according to claim 1, characterized in that: The expansion component of the adjustment mechanism also includes a pulling component, which is connected to the top of the internal adjustment cylinder. An inward-shrinking extrusion piece is arranged inside the drill bit. The outer end surface of the pulling component is slidably matched with the inward-shrinking extrusion piece. An air hole is formed on the internal adjustment cylinder, and the air hole corresponds to the position of the adjustment block.

3. A coring device for road construction according to claim 2, characterized in that: The pressure-applying assembly of the adjusting mechanism includes a pressure plate and a connecting rod. The pressure plate is arranged at the top of the drill sleeve, and the drill rod of the power mechanism passes through and is slidably connected to the pressure plate. Four connecting rods are arranged at the bottom of the pressure plate, and the connecting rods pass through the top of the drill sleeve and are connected to the pulling assembly located inside the drill sleeve.

4. A coring device for road construction according to claim 3, characterized in that: The pulling assembly comprises a pressure-bearing end and a deformation end, wherein the pressure-bearing end is a circular ring and the deformation end is a cross-rod structure arranged in a ring shape.

5. A coring device for road construction according to claim 4, characterized in that: The inward-retracting extrusion piece is used to squeeze the top of the internal adjustment tube inward when the internal adjustment tube rises, so that the internal adjustment tube forms a cone barrel shape. The inward-retracting extrusion piece is a circular ring with a chamfered bottom.

6. A coring device for road construction according to claim 3, characterized in that: A support spring is arranged between the pressure plate and the drill sleeve, and the support spring is sleeved on the outside of the drill rod.

7. A coring device for road construction according to claim 5, characterized in that: The diameter of the pulling component in an initial state is smaller than the diameter of the top of the internal adjustment cylinder in an initial state.

8. A coring device for road construction according to claim 1, characterized in that: A gap is arranged between the bottom of the internal adjustment tube and the bottom of the drill sleeve. An alloy drill bit is arranged at the bottom of the drill sleeve. The width of the alloy drill bit is equal to the wall thickness of the drill sleeve plus the wall thickness of the internal adjustment tube.

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