An automatic light cone dynamic penetrometer

Abstract

This invention relates to an automatic lightweight cone penetrometer, comprising a trolley and a fixed support. The fixed support is mounted on the front outer surface of the trolley, and a movable rod is fixedly connected to the upper part of the right outer surface of the fixed support. A control unit drives a pull rope to lift a hammer, which is then limited by a guide rod, ensuring the hammer accurately lands on the hammer base. This allows the probe at the lower end of the hammer base to effectively penetrate the ground. A hammer-counting sensor on the hammer base transmits data to the control unit, recording the number of hammer strikes. This eliminates the need for manual recording of hammer strikes and manual lifting of the hammer, reducing labor intensity and saving labor costs. Furthermore, when pulling the probe out of the ground, the use of a toothed belt and gears further reduces labor intensity.

Description

Technical Field

[0001] This invention relates to the field of cone dynamic penetrometer devices, specifically an automatic lightweight cone dynamic penetrometer. Background Technology

[0002] The lightweight cone penetrometer is an instrument used for engineering geological exploration, foundation testing, and construction excavation inspection. It can be used to estimate the bearing capacity of natural foundations, identify their soil and rock properties, estimate the bearing capacity of treated soil foundations, evaluate the effect of foundation treatment, inspect the pile quality of composite foundation reinforcement, and identify the soil and rock properties of the bearing layer at the pile tip of cast-in-place concrete piles.

[0003] Traditional lightweight cone penetrometers still require manual operation, necessitating the repeated lifting of the hammer. Due to the hammer's weight, frequent lifting consumes significant physical strength, requiring multiple people to take turns, which is not only time-consuming and labor-intensive but also increases labor costs. Furthermore, pulling the probe out requires multiple people simultaneously, further complicating the process and reducing efficiency. Additionally, since the survey environment is often construction sites with uneven surfaces, existing devices require workers to support them, which can lead to tilting and inaccurate data recording. Moreover, the damp ground at construction sites causes the probe's outer surface to accumulate damp dirt after use; failure to clean this promptly can corrode the probe, causing rust and shortening its lifespan.

[0004] To address the aforementioned technical shortcomings, a solution is proposed. Summary of the Invention

[0005] The purpose of this invention is to reduce labor intensity and lower labor costs. By controlling the main unit to operate the pull rope, the hammer is raised and then limited by a guide rod, ensuring the raised hammer accurately lands on the hammer base. This allows the probe at the lower end of the hammer base to effectively penetrate the ground. A hammer-counting sensor on the hammer base transmits data to the main unit, recording the number of hammer blows. This eliminates the need for manual recording of blows and manual lifting of the hammer, reducing labor intensity and saving labor costs. Furthermore, when pulling the probe out of the ground later, the use of a toothed belt and gears further reduces labor intensity and improves work efficiency. Therefore, this invention provides an automatic, lightweight cone penetrometer to solve the aforementioned problems.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] An automatic lightweight cone dynamic penetrometer includes a trolley and fixed supports. The fixed supports are provided on the front outer surface of the trolley. A movable rod is fixedly connected to the right outer surface of the fixed supports near the upper end. A top plate is provided on the right outer surface of the movable rod. There are two fixed supports, which are symmetrically distributed on both sides of the top plate. A cavity is opened inside the fixed supports. A lifting mechanism is provided on the adjacent surfaces of the two fixed supports.

[0008] The lifting mechanism includes a toothed belt, a connecting rod, a gear, a second spring, a telescopic screw, a probe rod, a hammer seat, a guide rod, a rotating groove, a rotating block, a threaded groove, and a through-hole hammer. A gear is provided on the left outer surface of the connecting rod. The toothed belt is located inside a cavity, with the gear penetrating the cavity and meshing with the toothed belt. The right outer surface of the connecting rod is hollow, and the second spring is located inside the hollow structure of the connecting rod. A telescopic screw is fixedly connected to the right outer surface of the second spring, and the telescopic screw has a T-shaped structure. The left outer surface of the guide rod... A rotating groove is provided near the upper end of the surface. A rotating block is rotatably connected inside the rotating groove, and the rotating block has a T-shaped structure. The rotating groove and the rotating block are matched with each other. A threaded groove is provided inside the rotating block, and the threaded groove is threadedly connected to the telescopic screw. A hammer seat is provided at the lower end of the guide rod. A probe rod is provided at the lower end of the hammer seat, and the lower end of the probe rod has a conical structure. A through hammer is sleeved on the outer surface of the guide rod, and the diameter of the hammer seat is larger than the diameter of the through hole of the through hammer. A hammer-counting sensor is provided inside the hammer seat.

[0009] Furthermore, a first telescopic rod is fixedly connected to the right outer surface of the fixed support near the lower end, a second telescopic rod is provided inside the first telescopic rod, a third spring is fixedly connected to one end of the second telescopic rod located inside the first telescopic rod, and a cleaning block is fixedly connected to the right outer surface of the second telescopic rod.

[0010] Furthermore, an absorbent sponge is provided on the upper part of the right outer surface of the cleaning block, and a cleaning brush is provided on the lower part of the right outer surface of the cleaning block. The cleaning block has a semi-circular structure, and the cleaning block matches and fits the outer surface of the probe rod.

[0011] Furthermore, a through groove is provided inside the movable rod near the right side, and a first spring is provided inside the through groove. The upper and lower ends of the first spring are fixedly connected to locking blocks. A limit groove is provided inside the top plate on the left side, and locking slots are provided inside the limit groove near the upper and lower ends of the right side. A sliding cable is fixedly connected to the lower outer surface of the top plate near the middle.

[0012] Furthermore, a movable rod is movably connected inside the slot, and the locking block on the movable rod engages with the slot opened inside the limiting groove.

[0013] Furthermore, a slider is fixedly connected to the lower outer surface of the fixed support near the middle position, and the slider has a T-shaped structure. A conical spike is provided on the lower outer surface of the fixed support, and a groove is opened on the upper outer surface of the conical spike near the middle position. The slider is slidably connected inside the groove. A number of balls are evenly arranged on the lower outer surface of the slider, and the balls slide in cooperation with the bottom of the groove.

[0014] Furthermore, a bearing is embedded in the upper outer surface of the conical spike near the rear end. A control unit is located near the middle of the upper outer surface of the trolley, and a rope-retracting motor is located inside the control unit near the front end. A pull rope is located on the upper outer surface of the control unit near the front end, and the pull rope is connected to the rope-retracting motor. A hammer counter is located on the upper outer surface of the control unit near the rear end, and the hammer counter is connected to the hammer-retracting sensor on the hammer. A fixing hole is opened on the front outer surface of the trolley near the right side, and a fixing screw is threaded inside the fixing hole. The fixing screw passes through and extends to the lower end of the fixing hole and is fixed inside the bearing. The outer surface of the fixing screw is threaded near the lower end.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. In this invention, by setting up a lifting mechanism, the main control unit drives the pull rope to operate, using the pull rope to lift the hammer. Then, the guide rod limits its position, ensuring that the raised hammer accurately lands on the hammer base. This allows the probe at the lower end of the hammer base to effectively enter the ground. The hammer-recording sensor on the hammer base then transmits the data to the main control unit, recording the number of hammer blows. This eliminates the need for manual recording of hammer blows and manual lifting of the hammer, reducing labor intensity and saving labor costs. Furthermore, when pulling the probe out of the ground later, the combination of a toothed belt and gears allows the probe to be pulled out from underground, further reducing labor intensity and improving work efficiency.

[0017] 2. In this invention, by setting up a fixed support column, a conical spike, a first telescopic rod, a second telescopic rod, and a cleaning block, the device is inserted into the ground using the conical spike at the lower end of the fixed support column during use. This allows the device to be stably fixed on the ground, preventing it from shaking or tilting when the probe is driven into the ground. This ensures that the probe is driven straight into the ground, improving data accuracy. At the same time, when the probe is pulled up, the cleaning blocks on the first and second telescopic rods adhere to the probe surface, removing the dirt attached to the probe surface. This reduces the chance of corrosion on the probe surface, prevents rust on the outer surface of the probe, increases the service life of the probe, and reduces purchase costs. Attached Figure Description

[0018] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings;

[0019] Figure 1 This is a front view schematic diagram of the present invention;

[0020] Figure 2 This is a front sectional view of the present invention;

[0021] Figure 3 For the present invention Figure 2 Enlarged view of point A in the middle;

[0022] Figure 4 For the present invention Figure 2 Enlarged view of point B in the middle;

[0023] Figure 5 For the present invention Figure 2 Enlarged view of point C in the middle;

[0024] Figure 6 For the present invention Figure 2 Enlarged view of point D;

[0025] Figure 7 This is a schematic diagram showing the combination of the first telescopic rod and the second telescopic rod of the present invention;

[0026] Figure 8 For the present invention Figure 1 The diagram on the right;

[0027] Figure 9 For the present invention Figure 8 Enlarged diagram of point E in the middle.

[0028] Reference numerals: 1. Trolley; 11. Control unit; 12. Pull rope; 13. Fixing hole; 2. Fixing support; 21. Movable rod; 22. Through groove; 23. First spring; 24. Locking block; 25. Conical spike; 26. Slide groove; 27. Sliding block; 28. Ball bearing; 29. ​​Cavity; 291. Bearing; 3. Lifting mechanism; 31. Toothed belt; 32. Connecting rod; 33. Gear; 34. Second spring; 35. Telescopic screw; 36. Probe rod; 37. Hammer seat; 38. Guide rod; 39. Rotating groove; 391. Rotating block; 392. Threaded groove; 393. Through hammer; 4. Top plate; 41. Limiting groove; 42. Locking groove; 43. Slide rope; 5. First telescopic rod; 51. Third spring; 52. Second telescopic rod; 53. Cleaning block; 6. Fixing screw. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Example 1:

[0031] like Figure 1-8 As shown, the present invention proposes an automatic lightweight cone dynamic penetrometer, comprising a trolley 1 and fixed support columns 2. The fixed support columns 2 are provided on the outer surface of the front end of the trolley 1. A movable rod 21 is fixedly connected to the upper part of the right outer surface of the fixed support column 2. A top plate 4 is provided on the outer surface of the right side of the movable rod 21. There are two fixed support columns 2, which are symmetrically distributed on both sides of the top plate 4. The two fixed support columns 2 are used to fix the probe rod 36, etc., to prevent the probe rod 36 from shifting or tilting during operation, which would result in low data accuracy. A cavity 29 is opened inside the fixed support column 2. A lifting mechanism 3 is provided on the adjacent surface of the two fixed support columns 2. The lifting mechanism 3 can save labor, reduce labor costs, and effectively improve work efficiency.

[0032] The lifting mechanism 3 includes a toothed belt 31, a connecting rod 32, a gear 33, a second spring 34, a telescopic screw 35, a probe rod 36, a hammer seat 37, a guide rod 38, a rotating groove 39, a rotating block 391, a threaded groove 392, and a through-hole hammer 393. A gear 33 is provided on the left outer surface of the connecting rod 32. The toothed belt 31 is located inside the cavity 29, and the gear 33 penetrates into the cavity 29 and meshes with the toothed belt 31. The toothed belt 31 drives the gear 33 to rotate, thereby enabling the lifting mechanism to pull out the probe rod 36. No manual pulling is required, reducing labor intensity. The right outer surface of the connecting rod 32 is hollow, and the second spring 34 is located inside the hollow structure of the connecting rod 32. A telescopic screw 35 is fixedly connected to the right outer surface of the second spring 34, and the telescopic screw 35 has a T-shaped structure. A rotating groove 39 is opened on the left outer surface of the guide rod 38 near the upper end. A rotating block 391 is rotatably connected inside the rotating groove 39, which can effectively rotate the rotating block 391, so that the guide rod 38 can be replaced or disassembled when needed. The telescopic screw 35 can be rotated out of the threaded groove 392 by rotating the rotating block 391, thereby enabling the replacement of the guide rod 38. The rotating block 391 has a T-shaped structure, and the rotating groove 39 and the rotating block 391 are matched with each other. The rotating block 391 has a threaded groove 392 inside, and the threaded groove 392 is threadedly connected to the telescopic screw 35. The lower end of the guide rod 38 is provided with a hammer seat 37, which facilitates the hammering of the through hammer 393, thereby hammering the probe rod 36 into the ground. The lower end of the hammer seat 37 is provided with the probe rod 36, and the lower end of the probe rod 36 has a conical structure, which facilitates the insertion of the probe rod 36. The outer surface of the guide rod 38 is fitted with the through hammer 393, and the diameter of the hammer seat 37 is larger than the diameter of the through hole of the hammer core of the through hammer 393. The hammer seat 37 is provided with a hammer counting sensor inside, which is used to record the number of hammer blows, thereby realizing an automatic recording function and reducing labor.

[0033] The movable rod 21 has a through groove 22 located near the right side. A first spring 23 is installed inside the through groove 22. A locking block 24 is fixedly connected to both the upper and lower ends of the first spring 23. The reverse elastic force of the first spring 23 pushes the locking block 24 into the locking groove 42 for fixation. A limiting groove 41 is located on the left side of the top plate 4. The limiting groove 41 limits and fixes the fixed support column 2. When the probe rod 36 needs to be driven into the ground, the locking block 24 disengages from the locking groove 42, thereby disengaging the gear 33 from the toothed belt 31. This facilitates the downward movement of the probe rod 36. When it is necessary to pull the probe rod 36 out of the ground, the locking block 24 and the locking groove 42 are engaged with each other, and the gear 33 and the toothed belt 31 mesh. The toothed belt 31 can drive the gear 33 to rotate, thereby pulling the probe rod 36 upward without the need for manual pulling, reducing labor intensity. The limiting groove 41 has locking grooves 42 at the upper and lower ends near the right side. The lower outer surface of the top plate 4 is fixedly connected to the sliding cable 43 near the middle position. The sliding cable 43 is used to pull the rope 12 to pull up or lower the hammer 393.

[0034] A slider 27 is fixedly connected to the lower outer surface of the fixed support 2 near the middle position. The slider 27 slides inside the groove 26, allowing the fixed support 2 to move on the upper end of the conical spike 25. The slider 27 has a T-shaped structure. The lower outer surface of the fixed support 2 is provided with a conical spike 25 for fixing the fixed support 2, which is used to prevent tilting of the device and the probe 36 during use. The upper outer surface of the conical spike 25 is provided with a groove 26 near the middle position, and the slider 27 is slidably connected inside the groove 26. Several balls 28 are evenly spaced on the lower outer surface of the 27, and the balls 28 slide in cooperation with the bottom of the groove 26. The balls 28 make it easy for the user to push the fixed support 2. Pushing the fixed support 2 is to separate the gear 33 from the toothed belt 31 so that the probe rod 36 can be hammered into the ground. At the same time, the fixed support 2 is reset, and the gear 33 and the toothed belt 31 are engaged, so that the probe rod 36 inserted into the ground can be pulled out. This eliminates the need for manual removal by workers, reduces labor, and improves work efficiency.

[0035] Traditional lightweight cone penetrometers require manual operation during use, necessitating the repeated lifting of the hammer 393. Due to the hammer's weight, frequent lifting consumes significant physical strength, requiring multiple operators, which is time-consuming, labor-intensive, and increases labor costs. Furthermore, pulling out the probe 36 requires multiple operators simultaneously, further reducing efficiency. Additionally, the uneven terrain of construction sites necessitates worker support, which can lead to tilting and inaccurate data recording. This invention addresses this issue by incorporating a lifting mechanism 3. During operation, the main control unit 11 drives the pull rope 12 to lift the hammer 393, which is then stopped by the guide rod 38, ensuring the hammer 393 accurately lands on the hammer base 37. The upper part of the hammer base 37 allows the probe rod 36 at the lower end of the hammer base 37 to effectively enter the ground. Then, the data is transmitted to the control host 11 through the hammer counting sensor set on the hammer base 37, so that the number of hammer blows can be recorded. This eliminates the need for workers to record the number of hammer blows and to lift the through hammer 393 to strike, reducing labor intensity and saving labor costs. At the same time, when the probe rod 36 is pulled out of the ground later, the two fixed support columns 2 on both sides are pushed to the adjacent surface, so that the movable rod 21 moves into the limiting groove 41. At the same time, the lower slider 27 slides in the sliding groove 26. Then, the locking block 24 is pressed into the locking groove 42 by the reverse elastic force of the first spring 23. At this time, the toothed belt 31 and the gear 33 are engaged. The toothed belt 31 drives the gear 33, so that the gear 33 moves upward, thereby pulling the probe rod 36 out of the ground, which greatly reduces labor intensity and improves work efficiency.

[0036] Example 2:

[0037] like Figure 1-9 As shown, a first telescopic rod 5 is fixedly connected to the lower end of the right outer surface of the fixed support 2. A second telescopic rod 52 is provided inside the first telescopic rod 5. A third spring 51 is fixedly connected to one end of the second telescopic rod 52 inside the first telescopic rod 5. This allows the second telescopic rod 52 to extend and retract inside the first telescopic rod 5. At the same time, the elasticity of the third spring 51 can be used to push the second telescopic rod 52 into the interior of the first telescopic rod 5 when it is fitted and matched with probes 36 of different sizes. The third spring 51 can also push the second telescopic rod 52 outward, thereby pushing the cleaning block 53 on the outer side of the second telescopic rod 52 against the outer surface of the probe 36 for brushing and cleaning. The cleaning block 53 is fixedly connected to the right outer surface of the second telescopic rod 52, which can brush and clean the outer surface of the probe 36, improve cleanliness, prevent dirt from adhering to the outer surface of the probe 36 and corroding it, and improve the service life of the probe 36.

[0038] The upper part of the right outer surface of the cleaning block 53 is provided with an absorbent sponge, which can absorb the moisture on the outer surface of the probe rod 36 and prevent the probe rod 36 from rusting. The lower part of the right outer surface of the cleaning block 53 is provided with a cleaning brush, which can brush away the dirt attached to the outer surface of the probe rod 36, improve the cleanliness of the probe rod 36, prevent corrosion of the probe rod 36, and extend the service life of the probe rod 36. The cleaning block 53 has a semi-circular structure and fits closely to the outer surface of the probe rod 36, which can effectively clean the outer surface of the probe rod 36 and improve the cleaning effect.

[0039] During operation, due to the dampness of the construction site, a large amount of damp mud adheres to the outer surface of the probe 36 after use. If not cleaned in time, this will cause corrosion of the probe 36, resulting in rust and reducing its service life. This invention addresses this by setting up a fixed support 2, a conical spike 25, a first telescopic rod 5, a second telescopic rod 52, and a cleaning block 53. When the probe 36 is pulled upwards, the cleaning block 53 on the first and second telescopic rods 5 and 52 adheres to the surface of the probe 36, effectively removing the mud. This reduces the chance of corrosion, prevents rust, extends the service life of the probe 36, and lowers the purchase cost. Furthermore, after pulling out the probe 36, tightening the fixing screw 6 into the fixing hole 13 causes the conical spike 25 at the lower end of the fixed support 2 to detach from the ground, preventing damage to the lower end of the spike 25 and improving the safety of the device.

[0040] Working principle of the invention:

[0041] In use, the main control unit 11 drives the pull rope 12 to lift the hammer 393. The guide rod 38 then limits its movement, ensuring the hammer 393 lands accurately on the hammer base 37. This allows the probe 36 at the bottom of the hammer base 37 to effectively penetrate the ground. The hammer-counting sensor on the hammer base 37 transmits data to the main control unit 11, recording the number of hammer blows. This eliminates the need for manual recording of blows and manual lifting of the hammer 393, reducing labor intensity and saving labor costs. Later, when the probe 36 is pulled out of the ground, the two fixed supports 2 are pushed towards the adjacent surfaces, causing the movable rod 21 to move into the limiting groove 41. Simultaneously, the lower slider 27 slides inside the sliding groove 26. The locking block 24 is then pressed into the locking groove 42 by the reverse force of the first spring 23. At this point, the toothed belt 31 and the gear 33 engage, utilizing… The toothed belt 31 drives the gear 33, causing the gear 33 to move upward, thereby pulling the probe rod 36 out of the ground. This greatly reduces labor intensity and improves work efficiency. When the probe rod 36 needs to be pulled out, the cleaning blocks 53 on the first telescopic rod 5 and the second telescopic rod 52 come into contact with the surface of the probe rod 36, which can clean the dirt attached to the surface of the probe rod 36, thereby reducing the chance of corrosion of the surface of the probe rod 36, preventing the outer surface of the probe rod 36 from rusting, increasing the service life of the probe rod 36, and reducing the purchase cost. At the same time, after the probe rod 36 is pulled out, the fixing screw 6 is tightened into the fixing hole 13. Since the lower end of the fixing screw 6 is connected to the conical spike 25 through the bearing 291, the fixing screw 6 can be easily rotated. When it is rotated into the fixing hole 13, the conical spike 25 at the lower end of the fixing support 2 is lifted off the ground, preventing the lower end of the conical spike 25 from being damaged and improving the safety of the device.

[0042] The above description is merely an example and illustration of the structure of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described, or use similar methods to replace them, as long as they do not deviate from the structure of the invention or exceed the scope defined in the claims, all of which should fall within the protection scope of the present invention.

[0043] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0044] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. An automatic lightweight cone dynamic penetrometer, comprising a trolley (1) and a fixed support (2), characterized in that, The front outer surface of the trolley (1) is provided with a fixed support column (2). A movable rod (21) is fixedly connected to the right outer surface of the fixed support column (2) near the upper end. A top plate (4) is provided on the right outer surface of the movable rod (21). There are two fixed supports (2). The two fixed supports (2) are symmetrically distributed on both sides of the top plate (4). A cavity (29) is opened inside the fixed support column (2). A lifting mechanism (3) is provided on the adjacent surfaces of the two fixed supports (2). The lifting mechanism (3) includes a toothed belt (31), a connecting rod (32), a gear (33), a second spring (34), a telescopic screw (35), a probe (36), a hammer seat (37), a guide rod (38), a rotating groove (39), a rotating block (391), a threaded groove (392), and a through-hole hammer (393). A gear (33) is provided on the left outer surface of the connecting rod (32). The toothed belt (31) is located inside the cavity (29), and the gear (33) penetrates into the cavity (29) and meshes with the toothed belt (31). The right outer surface of the connecting rod (32) has a hollow structure, and the second spring (34) is located inside the hollow structure of the connecting rod (32). A telescopic screw (35) is fixedly connected to the right outer surface of the second spring (34), and the telescopic screw (35) has a T-shaped structure. A rotating groove (39) is provided on the left outer surface of the guide rod (38) near the upper end. A rotating block (391) is rotatably connected inside the rotating groove (39), and the rotating block (391) has a T-shaped structure. The rotating groove (39) and the rotating block (391) are matched with each other. A threaded groove (392) is provided inside the rotating block (391), and the threaded groove (392) is threadedly connected to the telescopic screw (35). A hammer seat (37) is provided at the lower end of the guide rod (38). A probe rod (36) is provided at the lower end of the hammer seat (37), and the lower end of the probe rod (36) has a conical structure. A through-hole hammer (393) is sleeved on the outer surface of the guide rod (38), and the diameter of the hammer seat (37) is larger than the diameter of the through hole of the hammer core (393). A hammer-counting sensor is provided inside the hammer seat (37).

2. The automatic lightweight cone dynamic penetrometer according to claim 1, characterized in that, A first telescopic rod (5) is fixedly connected to the right outer surface of the fixed support (2) near the lower end. A second telescopic rod (52) is provided inside the first telescopic rod (5). A third spring (51) is fixedly connected to one end of the second telescopic rod (52) inside the first telescopic rod (5). A cleaning block (53) is fixedly connected to the right outer surface of the second telescopic rod (52).

3. The automatic lightweight cone dynamic penetrometer according to claim 2, characterized in that, The cleaning block (53) has an absorbent sponge on its right outer surface near the upper end, and a cleaning brush on its right outer surface near the lower end. The cleaning block (53) has a semi-circular structure, and the cleaning block (53) matches and fits the outer surface of the probe (36).

4. The automatic lightweight cone dynamic penetrometer according to claim 1, characterized in that, The movable rod (21) has a through groove (22) near the right side inside. A first spring (23) is installed inside the through groove (22). A locking block (24) is fixedly connected to the upper and lower ends of the first spring (23). A limiting groove (41) is opened on the left side inside the top plate (4). A locking groove (42) is opened on the upper and lower ends of the limiting groove (41) near the right side inside. A sliding cable (43) is fixedly connected to the lower outer surface of the top plate (4) near the middle.

5. An automatic lightweight cone dynamic penetrometer according to claim 4, characterized in that, The slot (42) is movably connected to a movable rod (21), and the locking block (24) on the movable rod (21) and the slot (42) inside the limiting groove (41) are engaged and connected.

6. An automatic lightweight cone dynamic penetrometer according to claim 1, characterized in that, A slider (27) is fixedly connected to the lower outer surface of the fixed support (2) near the middle position, and the slider (27) has a T-shaped structure. A conical spike (25) is provided on the lower outer surface of the fixed support (2). A groove (26) is opened on the upper outer surface of the conical spike (25) near the middle position, and the slider (27) is slidably connected inside the groove (26). A number of balls (28) are evenly arranged on the lower outer surface of the slider (27), and the balls (28) slide in cooperation with the bottom of the groove (26).

7. An automatic lightweight cone dynamic penetrometer according to claim 6, characterized in that, A bearing (291) is embedded in the upper outer surface of the conical spike (25) near the rear end. A control host (11) is provided on the upper outer surface of the trolley (1) near the middle. A rope winding motor is provided inside the control host (11) near the front end. A pull rope (12) is provided on the upper outer surface of the control host (11) near the front end. The pull rope (12) is connected to the rope winding motor. A hammer counter is provided on the upper outer surface of the control host (11) near the rear end. The hammer counter is connected to the hammer counting sensor on the hammer (393). A fixing hole (13) is opened on the front outer surface of the trolley (1) near the right side. A fixing screw (6) is threaded inside the fixing hole (13). The fixing screw (6) passes through and extends to the lower end of the fixing hole (13) and is fixed inside the bearing (291). A thread is opened on the outer surface of the fixing screw (6) near the lower end.

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