NC Compaction Tester

Abstract

The present invention discloses a numerical control compaction instrument, which includes a base. A support arm is arranged on the base, and a fixed seat is fixedly connected to the top of the support arm. A compaction hammer is vertically slidably arranged on the fixed seat. A compaction cylinder is placed on the base, and a base plate is also placed on the base. A plurality of micro-protrusions are arranged on the top surface of the base plate. The base plate is located inside the compaction cylinder, and the outer peripheral surface of the base plate can be attached to the inner peripheral wall of the compaction cylinder. The compaction cylinder includes two mutually spliced arc-shaped plates. A transverse chute is formed on the top surface of the base. A transverse slider is installed at the bottom of the arc-shaped plate, and the transverse slider is slidably arranged in the transverse chute. A driving device for driving the two transverse sliders to approach or move away from each other is arranged in the transverse chute. This application has the effect of facilitating the separation of the compacted test soil from the compaction cylinder.

Description

Technical Field

[0001] The present invention relates to the field of compaction instruments, and more particularly to numerically controlled compaction instruments. Background Art

[0002] A compaction instrument is a material testing device used in the process of engineering construction. Its types are mainly divided into heavy manual compaction instruments and numerically controlled electric compaction instruments. The numerically controlled compaction instrument is used to determine the optimum moisture content of compacted soil and its unit volume weight, providing data support for the moisture and density of soil filled in the building subgrade.

[0003] Refer to Figure 1 As shown, a numerically controlled compaction instrument generally includes a base 1 and an arm 2 integrally formed with the base 1. A fixed seat 3 is fixed at the top of the arm. A compaction hammer 4 is vertically slidably arranged on the fixed seat 3. The compaction hammer 4 is controlled by a numerical control system. A compaction cylinder 5 for containing test soil is placed on the top surface of the base 1. The compaction cylinder 5 is located directly below the compaction hammer 4.

[0004] In view of the above related technologies, when the compaction hammer compacts the test soil in the compaction cylinder, the compacted test soil is often difficult to be removed from the compaction cylinder. It is necessary to transfer the compaction cylinder and use a demoulding tool to take out the test soil in the compaction cylinder. If the compaction cylinder drops or collides with external objects during the removal process, it may cause damage to the compacted test soil. Summary of the Invention

[0005] In order to facilitate the separation of the compacted test soil from the compaction cylinder, the present application provides a numerically controlled compaction instrument.

[0006] The numerically controlled compaction instrument provided by the present application adopts the following technical solutions:

[0007] A numerically controlled compaction instrument, including a base, a support arm is arranged on the base, a fixed seat is fixedly connected to the top of the support arm, a compaction hammer is vertically slidably arranged on the fixed seat, a compaction cylinder is placed on the base, a substrate is also placed on the base, a plurality of micro protrusions are arranged on the top surface of the substrate, the substrate is located inside the compaction cylinder, the outer peripheral surface of the substrate can be attached to the inner peripheral wall of the compaction cylinder, the compaction cylinder includes two mutually spliced arc-shaped plates, a transverse chute is opened on the top surface of the base, a transverse slider is installed at the bottom of the arc-shaped plate, the transverse slider is slidably arranged in the transverse chute, and a driving device for driving the two transverse sliders to approach or move away from each other is arranged in the transverse chute.

[0008] By adopting the above technical solution, the horizontal slider is installed at the bottom of the arc-shaped plate, and the horizontal slider is slidably arranged in the horizontal chute. When the driving device drives the two horizontal sliders to slide away from each other, the two horizontal sliders can drive the two arc-shaped plates to move away from each other. Since a number of micro-protrusions are provided on the top surface of the substrate, after the compaction hammer compacts the test soil, the test soil can be tightly adhered to the substrate. Therefore, when the two arc-shaped plates move away from each other, the compacted test soil can be separated from the arc-shaped plates, which is convenient for the test soil to be separated from the compaction cylinder. The staff can directly detect the substrate together with the compacted test soil, which is convenient for the staff to operate.

[0009] Preferably, the driving device includes a double-headed screw rotatably arranged in the horizontal chute. The threads at both ends of the double-headed screw are opposite. The double-headed screw sequentially passes through the two horizontal sliders, and the double-headed screw is in threaded cooperation with the two horizontal sliders respectively. The two mutually remote side surfaces of the horizontal slider respectively abut against the two side surfaces of the horizontal chute.

[0010] By adopting the above technical solution, the double-headed screw sequentially passes through the two horizontal sliders, and the double-headed screw is in threaded cooperation with the two horizontal sliders respectively. When the double-headed screw rotates, the double-headed screw can drive the two horizontal sliders to slide away from each other, so as to drive the two arc-shaped plates to move away from each other, and further facilitate the separation of the test soil from the compaction cylinder.

[0011] Preferably, a vertical chute is provided on the base, and a connecting device is arranged in the vertical chute. The connecting device includes a vertical slider slidably arranged in the vertical chute. A sliding groove is formed on the side surface of the vertical slider close to the compaction cylinder. A sliding bar is slidably arranged in the sliding groove. An inclined surface is provided at the end of the sliding bar close to the compaction cylinder, and the inclined surface is arranged at the top of the sliding bar. A thrust spring for preventing the sliding bar from sliding into the sliding groove is arranged in the sliding groove. The compaction hammer includes a hammer part and a handle part. A dial rod is fixedly connected to the handle part, and the top surface of the dial rod is used to abut against the bottom surface of the sliding bar. A power device is connected to the vertical slider, and the power device is used to drive the double-headed screw to rotate when the vertical slider rises.

[0012] By adopting the above technical solution, during the process of the compaction hammer falling to hammer the test soil, the handle drives the lever to move downward. When the handle abuts against the inclined surface, as the compaction hammer continues to move downward, the lever can push the sliding bar into the sliding groove through the inclined surface. And when the lever moves below the sliding bar, the thrust spring pushes the sliding bar out of the sliding groove. When the compaction hammer rises, the top surface of the lever can abut against the bottom surface of the sliding bar, thereby driving the vertical slider to slide upward. Under the driving action of the power device, the double-headed screw rotates, so that when the compaction hammer rises after hammering the test soil, the two arc-shaped plates can automatically move away from each other.

[0013] Preferably, a cavity is provided inside the base, and the power device is arranged in the cavity. The power device includes a connecting shaft rotatably arranged in the cavity. A wire wheel is installed on the connecting shaft, and a connecting rope is wound around the wire wheel. One end of the connecting rope is fixed to the wire wheel, and the other end of the connecting rope passes through the support arm and is fixed to the vertical slider. A driving gear is installed on the connecting shaft. An annular groove is formed on the inner wall of the horizontal sliding groove, and the annular groove communicates with the cavity. A driven gear is installed on the connecting shaft, and the driven gear is rotatably arranged in the annular groove. The driven gear meshes with the driving gear.

[0014] By adopting the above technical solution, the connecting shaft is rotatably arranged in the cavity, the driving gear is installed on the connecting shaft, and the driven gear is installed on the double-headed screw. Therefore, when the vertical slider rises, the vertical slider can drive the connecting shaft to rotate through the connecting rope, so that the double-headed screw can rotate when the vertical slider rises.

[0015] Preferably, a tension mechanism is arranged in the sliding groove. The tension mechanism includes an attracting block fixedly connected to the side surface of the sliding bar away from the compaction hammer. An electromagnet capable of generating an attractive force on the attracting block is fixed on the inner wall of the sliding groove away from the compaction hammer.

[0016] By adopting the above technical solution, when the electric circuit of the electromagnet is turned on, the electromagnet can generate an attractive force on the attracting block, causing the attracting block to drive the sliding bar to slide into the sliding groove, so that the sliding bar is disengaged from the lever, and then the vertical slider can slide downward. When the connecting shaft rotates in the reverse direction, the wire reel can rewind the connecting rope onto the wire reel.

[0017] Preferably, a blind hole is formed on the bottom wall of the vertical sliding groove, and a damping rod is fixedly connected in the blind hole. The top end of the damping rod is fixedly connected to the bottom surface of the vertical slider.

[0018] By adopting the above technical solution, the bottom of the damping rod is fixed in the blind hole, and the top of the damping rod is fixed on the bottom surface of the vertical slider. After the sliding bar is separated from the dial rod, the vertical slider can slowly fall, thereby reducing the impact on the compactor caused by the rapid fall of the vertical slider.

[0019] Preferably, a return spring is further arranged on the connecting shaft. One end of the return spring is fixed on the connecting shaft, and the other end of the return spring is fixed on the inner wall of the cavity.

[0020] By adopting the above technical solution, one end of the return spring is fixed on the connecting shaft, and the other end of the return spring is fixed on the inner wall of the cavity. When the vertical slider rises and drives the connecting shaft to rotate through the connecting rope, the return spring generates an elastic force on the connecting shaft. After the sliding bar is separated from the dial rod, the return spring can drive the connecting shaft to rotate in the reverse direction, so that while the wire wheel rewinds the connecting rope on the wire wheel, the double-headed screw is driven to rotate in the reverse direction, and the two arc-shaped plates are recombined, facilitating the next operation of the compactor.

[0021] Preferably, a control mechanism is arranged on the support arm. The control mechanism includes a fixed block installed on the support arm. An activity groove is formed on the side surface of the fixed block. A control block is slidably arranged in the activity groove. A return spring that hinders the control block from sliding into the activity groove is arranged in the activity groove. A power supply is also installed on the support arm. A fixed contact piece is embedded on the inner wall of the activity groove. A moving contact piece that can be in contact with the fixed contact piece is embedded on the side surface of the control block. The moving contact piece is electrically connected to one of the electrodes of the power supply. The other electrode of the power supply is electrically connected to one end of the coil in the electromagnet. The other end of the coil in the electromagnet is electrically connected to the fixed contact piece.

[0022] By adopting the above technical solution, when the staff pushes the control block into the activity groove, the moving contact piece can be in contact with the fixed contact piece, thereby conducting the electrical circuit of the electromagnet, facilitating the staff to control the sliding of the sliding bar. And when the staff releases the control block, the control block can be pushed out of the activity groove under the elastic force of the return spring, so that the moving contact piece is separated from the fixed contact piece, thereby disconnecting the electrical circuit of the electromagnet. The sliding bar slides out of the sliding groove under the elastic force of the thrust spring, facilitating the next lap joint of the sliding bar and the dial rod.

[0023] Preferably, a limiting groove is formed on the inner wall of the sliding groove. A limiting block is fixed on the sliding bar. The limiting block is slidably arranged in the limiting groove.

[0024] By adopting the above technical solution, the limiting block is slidably arranged in the limiting groove, preventing the sliding bar from detaching from the sliding groove, thereby making the structure of the connecting device more stable.

[0025] Preferably, a groove is formed on the top surface of the base, and a convex block is fixedly connected to the bottom surface of the substrate. The convex block is inserted into the groove.

[0026] By adopting the above technical solution, when the convex block is inserted into the groove, the horizontal displacement of the substrate can be hindered, thereby reducing the possibility that when the two arc-shaped plates move away from each other, one of the arc-shaped plates drives the test soil together with the substrate to move. The compacted test soil can be stably located on the base, facilitating the staff to take it.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] 1. The horizontal slider is installed at the bottom of the arc-shaped plate, and the horizontal slider is slidably arranged in the horizontal chute. When the driving device drives the two horizontal sliders to slide away from each other, the two horizontal sliders can drive the two arc-shaped plates to move away from each other. Since a plurality of micro-protrusions are arranged on the top surface of the substrate, after the compaction hammer compacts the test soil, the test soil can be tightly adhered to the substrate. Therefore, when the two arc-shaped plates move away from each other, the compacted test soil can be separated from the arc-shaped plate, facilitating the separation of the test soil from the compaction cylinder. The staff can directly detect the substrate together with the compacted test soil, which is convenient for the staff to operate;

[0029] 2. During the process of the compaction hammer falling to hammer the test soil, the handle drives the lever to move downward. When the handle abuts against the inclined surface, as the compaction hammer continues to move downward, the lever can push the sliding bar into the sliding groove through the inclined surface. And when the lever moves below the sliding bar, the thrust spring pushes the sliding bar out of the sliding groove. When the compaction hammer rises, the top surface of the lever can abut against the bottom surface of the sliding bar, thereby driving the vertical slider to slide upward. Under the driving action of the power device, the double-headed screw rotates. Therefore, during the rising process after the compaction hammer hammers the test soil, the two arc-shaped plates can be automatically separated from each other;

[0030] 3. One end of the reset coil spring is fixed to the connecting shaft, and the other end of the reset coil spring is fixed to the inner wall of the cavity. When the vertical slider rises and drives the connecting shaft to rotate through the connecting rope, the reset coil spring generates an elastic force on the connecting shaft. When the sliding bar is separated from the lever, the reset coil spring can drive the connecting shaft to rotate in the reverse direction, so that the wire wheel rewinds the connecting rope on the wire wheel while driving the double-headed screw to rotate in the reverse direction, causing the two arc-shaped plates to merge again, facilitating the next operation of the compaction instrument. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a schematic structural diagram of the compaction instrument in the background art.

[0032] Figure 2 is a schematic overall structure diagram of the compaction instrument in the embodiment of the present application.

[0033] Figure 3 It is an exploded view of the substrate in the embodiment of the present application.

[0034] Figure 4 It is a cross-sectional view of the base in the embodiment of the present application.

[0035] Figure 5 It is a cross-sectional view of the support arm in the embodiment of the present application.

[0036] Figure 6 is Figure 5 a partial enlarged view of part A in

[0037] Figure 7 is Figure 5 a partial enlarged view of part B in

[0038] Explanation of reference numerals:

[0039] 1. Base; 11. Horizontal sliding groove; 111. Annular groove; 12. Cavity; 13. Groove; 2. Support arm; 21. Vertical sliding groove; 22. Blind hole; 23. Pusher rod; 3. Fixed seat; 4. Compaction hammer; 41. Handle part; 42. Hammer part; 5. Compaction cylinder; 51. Arc plate; 511. Horizontal slider; 6. Substrate; 61. Micro protrusion; 62. Protrusion; 7. Driving device; 71. Double-headed screw; 72. First rotating seat; 73. Driven gear; 8. Connecting device; 81. Vertical slider; 811. Sliding groove; 812. Limiting groove; 82. Sliding bar; 821. Limiting block; 822. Inclined plane; 83. Thrust spring; 84. Damping rod; 85. Tension mechanism; 851. Electromagnet; 852. Attracting block; 86. Control mechanism; 861. Fixed block; 8611. Activity groove; 862. Control block; 863. Return spring; 864. Fixed contact; 865. Moving contact; 866. Power supply; 9. Power device; 91. Connecting shaft; 92. Line wheel; 93. Driving gear; 94. Return winding spring; 95. Second rotating seat; 96. Connecting rope. Detailed implementation manners

[0040] The following further describes the present application in detail with reference to the attached Figure 2-7 drawings.

[0041] The embodiment of the present application discloses a numerically controlled compaction instrument. Refer to Figure 2 , Figure 3 and Figure 4As shown in the figure, the compaction apparatus includes a base 1, a support arm 2, a fixed seat 3, a compaction hammer 4, a compaction cylinder 5, a base plate 6, a driving device 7, a connecting device 8, and a power device 9. The base 1 is horizontally arranged. The support arm 2 is integrally formed on the top surface of the base 1. The support arm 2 is located on one side of the top surface of the base 1. The fixed seat 3 is fixed to the top of the support arm 2. The compaction hammer 4 includes a handle portion 41 and a hammer portion 42. The handle portion 41 vertically passes through the fixed seat 3. The handle portion 41 is slidably arranged on the fixed seat 3. The numerical control system inside the fixed seat 3 controls the vertical sliding of the handle portion 41. The hammer portion 42 is integrally formed at the bottom end of the handle portion 41. The handle portion 41 is located in the middle of the top surface of the hammer portion 42.

[0042] Referring to Figure 2 and Figure 3 As shown in the figure, a groove 13 is formed on the top surface of the base 1. The base plate 6 is placed on the top surface of the base 1. A plurality of micro protrusions 61 are arranged on the top surface of the base plate 6. The micro protrusions 61 are pyramid-shaped. A circular convex block 62 is fixedly connected to the bottom surface of the base plate 6. The convex block 62 is inserted into the groove 13. The outer peripheral surface of the convex block 62 abuts against the inner peripheral wall of the groove 13. The compaction cylinder 5 is located on the top surface of the base 1. The compaction cylinder 5 includes two arc-shaped plates 51. The two arc-shaped plates 51 are assembled into a cylindrical shape. A transverse chute 11 is formed on the top surface of the base 1. A transverse slider 511 is fixedly connected to the bottom surface of the arc-shaped plate 51. The transverse slider 511 is slidably arranged in the transverse chute 11. When the two arc-shaped plates 51 are combined, the concave surface of the arc-shaped plate 51 abuts against the outer periphery of the base plate 6.

[0043] Referring to Figure 2 and Figure 4 As shown in the figure, the driving device 7 includes a double-headed screw 71 and a first rotating seat 72. Two first rotating seats 72 are welded and fixed on the bottom wall of the transverse chute 11. The two first rotating seats 72 are respectively located at both ends of the transverse chute 11. The threads at both ends of the double-headed screw 71 are opposite. The double-headed screw 71 is horizontally rotatably arranged in the transverse chute 11. The two ends of the double-headed screw 71 respectively pass through the two transverse sliders 511. The two ends of the double-headed screw 71 are respectively in threaded cooperation with the two transverse sliders 511. The two mutually remote side surfaces of the transverse sliders 511 respectively abut against the two side surfaces of the transverse chute 11.

[0044] Referring to Figure 5 and Figure 6 As shown in the figure, a vertical chute 21 is formed on the side surface of the base 1 close to the compaction hammer 4. The connecting device 8 is arranged in the vertical chute 21. The connecting device 8 includes a vertical slider 81, a sliding bar 82, a thrust spring 83, a damping rod 84, a tension mechanism 85, and a control mechanism 86. The vertical slider 81 is vertically slidably arranged in the vertical chute 21. A blind hole 22 is formed on the bottom wall of the vertical chute 21. The bottom end of the damping rod 84 is fixedly connected to the blind hole 22. The top end of the damping rod 84 is fixedly connected to the bottom surface of the vertical slider 81.

[0045] Referring to Figure 5 and Figure 6 as shown, a sliding groove 811 is formed on the side of the vertical slider 81 close to the compaction cylinder 5. A sliding bar 82 is slidably arranged in the sliding groove 811. An inclined surface 822 is provided at the end of the sliding bar 82 close to the compaction cylinder 5, and the inclined surface 822 is arranged at the top of the sliding bar 82. A thrust spring 83 is arranged in the sliding groove 811. One end of the thrust spring 83 abuts against the side wall of the sliding groove 811 far from the compaction hammer 4, and the other end of the thrust spring 83 abuts against the end surface of the sliding bar 82 far from the compaction hammer 4. A limiting groove 812 is formed on the top wall of the sliding groove 811, and a limiting block 821 is fixedly welded on the top surface of the sliding bar 82. The limiting block 821 is slidably arranged in the limiting groove 812.

[0046] Referring to Figure 5 and Figure 6 as shown, a lever 23 is fixedly welded on the handle 41. The top surface of the lever 23 is used to abut against the bottom surface of the sliding bar 82. During the process of the compaction hammer 4 falling to hammer the test soil, the handle 41 drives the lever 23 to move downward. When the handle 41 abuts against the inclined surface 822, as the compaction hammer 4 continues to move downward, the lever 23 can push the sliding bar 82 into the sliding groove 811 through the inclined surface 822. And when the lever 23 moves to the lower side of the sliding bar 82, the thrust spring 83 pushes the sliding bar 82 out of the sliding groove 811. When the compaction hammer 4 rises, the top surface of the lever 23 can abut against the bottom surface of the sliding bar 82, thereby driving the vertical slider 81 to slide upward.

[0047] Referring to Figure 5 and Figure 6 as shown, a tension mechanism 85 is arranged in the sliding groove 811. The tension mechanism 85 includes an electromagnet 851 and an attracting block 852. The attracting block 852 is fixedly connected to the side surface of the sliding bar 82 far from the compaction hammer 4, and the electromagnet 851 is fixedly connected to the inner wall of the sliding groove 811 far from the compaction hammer 4. Both the electromagnet 851 and the attracting block 852 are located inside the thrust spring 83.

[0048] Referring to Figure 5 、 Figure 6 and Figure 7As shown, the control mechanism 86 is arranged on the support arm 2. The control mechanism 86 includes a fixed block 861, a control block 862, a return spring 863, a fixed contact piece 864, a moving contact piece 865 and a power source 866. The fixed block 861 is welded and fixed on the side of the support arm 2 away from the compaction hammer 4. An activity groove 8611 is formed on the side of the fixed block 861 away from the support arm 2. The control block 862 is slidably arranged in the activity groove 8611. The return spring 863 is arranged in the activity groove 8611. One end of the return spring 863 is fixedly connected to the side wall of the activity groove 8611 close to the support arm 2, and the other end of the return spring 863 is fixedly connected to the side of the control block 862 close to the support arm 2.

[0049] Referring to Figure 5 , Figure 6 and Figure 7 As shown, the power source 866 is also fixed on the side of the support arm 2 away from the compaction hammer 4. The fixed contact piece 864 is embedded in the top wall of the activity groove 8611. The moving contact piece 865 is embedded in the top surface of the control block 862. One of the electrodes of the moving contact piece 865 is electrically connected to the power source 866. The other electrode of the power source 866 is electrically connected to one end of the coil in the electromagnet 851. The other end of the coil in the electromagnet 851 is electrically connected to the fixed contact piece 864. When the control block 862 slides into the activity groove 8611, the moving contact piece 865 can be in contact with the fixed contact piece 864.

[0050] Referring to Figure 4 As shown, a cavity 12 is arranged in the base 1. The power device 9 is arranged in the cavity 12. The power device 9 includes a connecting shaft 91, a wire wheel 92, a driving gear 93, a return winding spring 94, a second rotating seat 95 and a connecting rope 96. Two second rotating seats 95 are fixedly connected to the bottom surface of the cavity 12. The two second rotating shafts are respectively located at both ends of the cavity 12. Both ends of the connecting shaft 91 are rotatably arranged on the two second rotating shafts. The axis direction of the connecting shaft 91 is parallel to the axis direction of the double-headed screw rod 71.

[0051] Referring to Figure 4 and Figure 5 As shown, a wire wheel 92 is coaxially and fixedly arranged on the connecting shaft 91. The connecting rope 96 is wound around the wire wheel 92. One end of the connecting rope 96 is fixed on the wire wheel 92. The other end of the connecting rope 96 passes through the support arm 2 vertically upward and is fixed on the bottom surface of the vertical slider 81. The driving gear 93 is coaxially welded and fixed on the connecting shaft 91. An annular groove 111 is formed on the inner wall of the transverse chute 11. The annular groove 111 is communicated with the cavity 12. A driven gear 73 is coaxially welded and fixed on the connecting shaft 91. The driven gear 73 is rotatably arranged in the annular groove 111. The driven gear 73 is meshed with the driving gear 93.

[0052] Referring to Figure 4As shown, the reset coil spring 94 is sleeved on the connecting shaft 91. One end of the reset coil spring 94 is fixed to the connecting shaft 91, and the other end of the reset coil spring 94 is fixed to the inner wall of the cavity 12.

[0053] The implementation principle of the digital compaction tester in the embodiment of the present application is as follows: During the process of the compaction hammer 4 falling to hammer the test soil, the handle 41 drives the lever 23 to move downward. When the handle 41 abuts against the inclined surface 822, as the compaction hammer 4 continues to move downward, the lever 23 can push the sliding bar 82 into the sliding groove 811 through the inclined surface 822. And when the lever 23 moves below the sliding bar 82, the thrust spring 83 pushes the sliding bar 82 out of the sliding groove 811. When the compaction hammer 4 rises, the top surface of the lever 23 can abut against the bottom surface of the sliding bar 82, thereby driving the vertical slider 81 to slide upward. When the vertical slider 81 rises, the vertical slider 81 can drive the connecting shaft 91 to rotate through the connecting rope 96, so that the double-headed screw rod 71 can rotate when the vertical slider 81 rises. Furthermore, when the compaction hammer 4 rises after hammering the test soil, the two arc-shaped plates 51 can automatically move away from each other.

[0054] When the driving device 7 drives the two transverse sliders 511 to slide away from each other, the two transverse sliders 511 can drive the two arc-shaped plates 51 to move away from each other. Since a number of micro-protrusions 61 are provided on the top surface of the substrate 6, after the compaction hammer 4 hammers the test soil solid, the test soil can adhere tightly to the substrate 6. Thus, when the two arc-shaped plates 51 move away from each other, the compacted test soil can be separated from the arc-shaped plates 51, facilitating the separation of the test soil from the compaction cylinder 5. The staff can directly detect the substrate 6 together with the compacted test soil, which is convenient for the staff to operate.

[0055] The above are all the preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. CNC compaction tester, including a base (1), a support arm (2) is arranged on the base (1), a fixing seat (3) is fixedly connected to the top of the support arm (2), a compaction hammer (4) is vertically slidably arranged on the fixing seat (3), and a compaction cylinder (5) is placed on the base (1), characterized in that: A substrate (6) is also placed on the base (1). A number of micro-protrusions (61) are provided on the top surface of the substrate (6). The substrate (6) is located inside the compaction cylinder (5). The outer peripheral surface of the substrate (6) is in contact with the inner peripheral wall of the compaction cylinder (5). The compaction cylinder (5) includes two arc-shaped plates (51) that are joined together. A transverse chute (11) is formed on the top surface of the base (1). A transverse slider (511) is installed at the bottom of the arc-shaped plate (51). The transverse slider (511) is slidably disposed in the transverse chute (11). A driving device (7) is provided in the transverse chute (11) for driving the two transverse sliders (511) to approach or move away from each other. The driving device (7) includes a double-headed screw (71) rotatably disposed in the transverse chute (11). The threads at both ends of the double-headed screw (71) are opposite. The double-headed screw (71) sequentially passes through the two transverse sliders (511). The double-headed screw (71) is in threaded cooperation with the two transverse sliders (511) respectively. The two mutually remote side surfaces of the transverse slider (511) are respectively abutted against the two side surfaces of the transverse chute (11). A vertical chute (21) is provided on the base (1). A connecting device (8) is provided in the vertical chute (21). The connecting device (8) includes a vertical slider (81) slidably disposed in the vertical chute (21). A sliding groove (811) is formed on the side surface of the vertical slider (81) close to the compaction cylinder (5). A sliding bar (82) is slidably disposed in the sliding groove (811). An inclined surface (822) is provided at the end of the sliding bar (82) close to the compaction cylinder (5). The inclined surface (822) is provided at the top of the sliding bar (82). A thrust spring (83) is provided in the sliding groove (811) for preventing the sliding bar (82) from sliding into the sliding groove (811). The compaction hammer (4) includes a hammer part (42) and a handle part (41). A lever (23) is fixedly connected to the handle part (41). The top surface of the lever (23) is used for abutting against the bottom surface of the sliding bar (82). A power device (9) is connected to the vertical slider (81). The power device (9) is used for driving the double-headed screw (71) to rotate when the vertical slider (81) ascends.

2. The digital control compaction tester according to claim 1, wherein: A cavity (12) is provided in the base (1), the power device (9) is provided in the cavity (12), the power device (9) comprises a connecting shaft (91) rotatably provided in the cavity (12), a wire wheel (92) is mounted on the connecting shaft (91), a connecting rope (96) is wound around the wire wheel (92), one end of the connecting rope (96) is fixed on the wire wheel (92), and the other end of the connecting rope (96) passes through the support arm (2). The connecting shaft (91) is fixed on the vertical slider (81), a driving gear (93) is installed on the connecting shaft (91), an annular groove (111) is provided on the inner wall of the transverse slide groove (11), the annular groove (111) is communicated with the cavity (12), a driven gear (73) is installed on the connecting shaft (91), the driven gear (73) is rotatably arranged in the annular groove (111), and the driven gear (73) is meshed with the driving gear (93).

3. The digital control compaction tester according to claim 2, characterized in that: A pulling mechanism (85) is arranged in the sliding groove (811), and the pulling mechanism (85) comprises an attraction block (852) fixedly connected to the side of the sliding bar (82) away from the hammer (4), and an electromagnet (851) capable of generating an attraction force on the attraction block (852) is fixed on the inner wall of the sliding groove (811) away from the hammer (4).

4. The digital control compaction tester according to claim 3, wherein: A blind hole (22) is provided on the outer wall of the vertical sliding groove (21), a damping rod (84) is fixedly connected in the blind hole (22), and the top end of the damping rod (84) is fixedly connected to the bottom surface of the vertical sliding block (81).

5. The digital control compaction tester according to claim 4, wherein: A return coil spring (94) is also provided on the connecting shaft (91), one end of the return coil spring (94) is fixed on the connecting shaft (91), and the other end of the return coil spring (94) is fixed on the inner wall of the cavity (12).

6. The digital control compactor according to claim 3, wherein: The support arm (2) is provided with a control mechanism (86), the control mechanism (86) comprising a fixed block (861) mounted on the support arm (2), a movable groove (8611) being provided on a side surface of the fixed block (861), a control block (862) being slidably disposed in the movable groove (8611), a return spring (863) being provided in the movable groove (8611) for preventing the control block (862) from sliding into the movable groove (8611), and a power supply (861) being further mounted on the support arm (2) 866), a fixed contact piece (864) is embedded on the inner wall of the movable groove (8611), a movable contact piece (865) that can contact the fixed contact piece (864) is embedded on the side of the control block (862), the movable contact piece (865) is electrically connected to one of the electrodes of the power supply (866), the other electrode of the power supply (866) is electrically connected to one end of the coil inside the electromagnet (851), and the other end of the coil inside the electromagnet (851) is electrically connected to the fixed contact piece (864).

7. The digital control compaction tester according to claim 1, wherein: A limiting groove (812) is formed on the inner wall of the sliding groove (811), a limiting block (821) is fixed on the sliding bar (82), and the limiting block (821) is slidably arranged in the limiting groove (812).

8. The digital control compaction tester according to claim 1, characterized in that: A groove (13) is formed on the top surface of the base (1), a convex block (62) is fixedly connected to the bottom surface of the substrate (6), and the convex block (62) is inserted into the groove (13).

Images