A compaction degree detection device for roadbed construction

Abstract

The utility model discloses a kind of compaction degree detection equipment for roadbed construction, more specifically related to highway engineering detection technical field, including trolley main body, the circular hole of upper and lower through is provided in trolley main body middle part, horizontal sliding connection has flat plate in trolley main body interior, the through hole is provided in the flat plate, the through hole can be matched with circular hole, funnel is equipped in the flat plate side, first support and second support are equipped in trolley main body upper end, weighing sensor is equipped on the first support, sand storage barrel is hung below weighing sensor, discharge pipe is equipped in sand storage barrel bottom, digging mechanism is equipped on the second support, for digging the roadbed of circular hole directly below.The utility model does not need additional independent weighing equipment, reduces data recording link and human error, annular blade replaces traditional manual digging tool, improves digging efficiency and reduces labor intensity, without frequently shifting equipment and switching tool, improve detection efficiency and operational convenience.

Description

Technical Field

[0001] This utility model relates to the field of highway engineering testing technology, and more specifically, to a compaction testing device for roadbed construction. Background Technology

[0002] In highway subgrade construction, compaction degree is a core quality indicator for measuring the density of subgrade fill, directly affecting the subgrade's bearing capacity and stability. Currently, the most commonly used method for compaction degree testing on construction sites is the sand cone method.

[0003] The traditional sand cone method testing process typically includes the following steps: First, a test hole of a specified size is dug on the compacted roadbed surface; then, all excavated soil samples are collected and weighed; next, standard sand is poured into the test hole through a sand cone and the mass of the poured sand is weighed; finally, the degree of compaction is calculated based on the density of the sand and the mass of the soil sample.

[0004] However, this process faces many inconveniences in practice. For example, excavation usually relies on purely manual tools such as shovels and chisels, which is inefficient and labor-intensive; the excavated soil samples and subsequent sand filling operations both require the use of independent weighing equipment such as electronic scales, making data recording cumbersome; moreover, the steps of digging holes, weighing, and sand filling are carried out separately, lacking an integrated operation platform, which makes it difficult to improve testing efficiency and easily introduces human error.

[0005] To address these issues, this invention proposes a compaction testing device for roadbed construction. Utility Model Content

[0006] In order to overcome the above-mentioned defects of the prior art, the present invention provides a compaction degree testing device for roadbed construction, which solves the problems mentioned in the background art by setting up a weighing sensor and a sand storage tank.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a compaction degree testing device for roadbed construction, comprising a trolley body, a through-hole in the middle of the trolley body, a flat plate slidably connected inside the trolley body, a through hole on the flat plate that can mate with the through-hole, a funnel on one side of the flat plate, a first support and a second support on the upper end of the trolley body, a weighing sensor on the first support, a sand storage bucket suspended below the weighing sensor, a discharge pipe at the bottom of the sand storage bucket located directly above the funnel, and a digging mechanism on the second support for digging the roadbed directly below the through-hole.

[0008] Preferably, the excavation mechanism includes two lead screws symmetrically distributed between the second support and the trolley body. The two lead screws rotate synchronously. The second support is provided with a mounting plate that cooperates with the two lead screws. A motor is provided on the mounting plate, and an annular blade is provided at the output end of the motor. The annular blade can pass through a round hole and a through hole. By synchronously driving the mounting plate to rise and fall with the two lead screws, it is ensured that the annular blade runs smoothly and is subjected to uniform force during the excavation process, thereby improving the regularity of the test pit and the excavation efficiency.

[0009] Preferably, each of the two lead screws is equipped with a pulley at its top, and a belt is fitted between the two pulleys. The synchronous rotation of the two lead screws is achieved through the cooperation of the pulleys and the belt, resulting in a simple, compact structure and reliable transmission.

[0010] Preferably, one of the lead screws is equipped with a handwheel at its top. By turning the handwheel, the lead screw can be manually driven to rotate, allowing for flexible adjustment of the height of the annular blades according to site conditions, thus facilitating manual control of the excavation depth.

[0011] Preferably, the top of the trolley body has a clearance groove, the bottom of the funnel is located in the clearance groove, and the upper end of the plate has a filling block located in the clearance groove. When the plate slides to the position where the through hole and the round hole are aligned, the filling block moves into the clearance groove to fill the space of the clearance groove and prevent debris generated during digging from entering the clearance groove.

[0012] Preferably, a circular ring is fitted around the outside of the sand storage tank, and the weighing sensor has multiple pull ropes evenly distributed along its circumference, with the free end of each pull rope fixed to the circular ring. The combination of multiple pull ropes and the circular ring suspends and fixes the sand storage tank, ensuring that the load of the sand storage tank is evenly transferred to the weighing sensor, thus improving weighing accuracy.

[0013] Preferably, each of the four corners of the trolley body is provided with a downward-facing storage cylinder. A slider is vertically slidably connected inside each storage cylinder. The bottom of each slider has a roller, and the top of the slider is rotatably connected to a screw, which is threaded into the top of the storage cylinder. Rotating the screw drives the slider to slide up and down within the storage cylinder, allowing the roller to extend or retract. This facilitates switching between mobile and stationary states, making it convenient to move workstations while ensuring equipment stability during testing.

[0014] Preferably, a valve is provided between the discharge pipe and the sand storage tank. The valve controls the flow and stoppage of standard sand, facilitating precise control of the sand filling amount and avoiding sand waste.

[0015] The technical effects and advantages of this utility model are as follows:

[0016] 1. This utility model integrates a weighing sensor, sand storage bucket, funnel, and digging mechanism onto the main body of the cart, consolidating the traditionally scattered steps of digging, weighing, and sand filling onto a single working platform, eliminating the need for frequent equipment transfers and tool switching. The sliding flat plate facilitates easy switching between digging and sand filling positions, while the handwheel-driven screw lifting mechanism allows for flexible on-site control of digging depth. The roller storage structure balances equipment transfer with operational stability, improving both testing efficiency and operational convenience.

[0017] 2. This utility model suspends the sand storage bucket below the weighing sensor using a pull rope and a ring, ensuring even load distribution and accurate weighing. The total mass change of the sand storage bucket and sand can be directly read before and after sand filling, eliminating the need for additional independent weighing equipment. This reduces data recording steps and human error, ensuring the accuracy of the sand filling amount and test hole volume calculation, thereby improving the reliability of compaction test results.

[0018] 3. The digging mechanism in this utility model adopts a double-screw synchronous drive to lift and lower the mounting plate, which works in conjunction with a motor-driven annular blade for rotary cutting, replacing traditional manual digging tools, improving digging efficiency and reducing labor intensity. The synchronous pulley and belt drive structure is simple and reliable, ensuring smooth operation and uniform force on the annular blade, thus improving the regularity of the test pit. At the same time, the filling block design effectively prevents debris from entering the equipment, ensuring long-term stable operation of the equipment. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0020] Figure 2 This is a front view sectional diagram of the overall structure of this utility model.

[0021] Figure 3 This is a cross-sectional view of the overall structure of the present invention along the upper end face of the flat plate.

[0022] Figure 4 This is a top view of the flat plate in this utility model.

[0023] Figure 5 This is a cross-sectional view of the overall structure of the present invention along the center of the lead screw.

[0024] Figure 6 This is a cross-sectional view of the overall structure of the present invention along the upper end face of the pulley.

[0025] Figure 7 This is a cross-sectional view of the overall mechanism of this utility model along the center of the screw.

[0026] Figure 8 This utility model Figure 7 An enlarged schematic diagram of part A in the middle.

[0027] The attached figures are labeled as follows:

[0028] 1. Cart body; 2. Circular hole; 3. Flat plate; 4. Through hole; 5. Funnel; 6. First support; 7. Second support; 8. Weighing sensor; 9. Sand storage bucket; 10. Discharge pipe; 11. Excavation mechanism; 1101. Lead screw; 1102. Mounting plate; 1103. Motor; 1104. Ring blade; 12. Pulley; 13. Belt; 14. Handwheel; 15. Clearance groove; 16. Filling block; 17. Ring; 18. Pull rope; 19. Storage cylinder; 20. Slider; 21. Roller; 22. Screw; 23. Valve. Detailed Implementation

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

[0030] like Figures 1 to 8 As shown, this utility model provides a compaction testing device for roadbed construction, which mainly includes a trolley body 1, a sliding plate 3, a weighing sensor 8, and an excavation mechanism 11.

[0031] The main body 1 of the cart is hollow, and a vertical circular hole 2 is opened in the middle of the main body 1, which provides an operating channel for digging and sand filling operations.

[0032] Inside the trolley body 1, there is a horizontally sliding plate 3 that can be pulled back and forth in the horizontal direction. A through hole 4 is provided on the plate 3. In the initial position, the through hole 4 aligns with the circular hole 2 on the trolley body 1, allowing the cutting tool of the excavating mechanism 11 to pass through. When sand filling is required, simply push the plate 3 horizontally to move the through hole 4 away. At this time, the solid part of the plate 3 blocks the circular hole 2, providing support for the funnel 5.

[0033] like Figure 1 and Figure 2 As shown, a funnel 5 is fixedly installed on one side of the plate 3. When the plate 3 slides to the sand-filling position, the funnel 5 is exactly above the circular hole 2. A first bracket 6 and a second bracket 7 are fixedly installed on the top of the trolley body 1. The first bracket 6 is used to install the weighing sensor 8, and the second bracket 7 is used to install the digging mechanism 11.

[0034] A weighing sensor 8 is fixed to the crossbeam of the first support 6, and a sand storage tank 9 is suspended below it by a rope 18. The sand storage tank 9 is used to store standard sand for filling, and a discharge pipe 10 is connected to the bottom of the sand storage tank 9. When the plate 3 is in the sand filling position, the discharge port of the discharge pipe 10 is exactly above the funnel 5, so that the sand flowing from the sand storage tank 9 can be accurately injected into the test hole on the roadbed through the funnel 5. A valve 23 is provided on the discharge pipe 10 to control the flow rate and start / stop of the sand.

[0035] It should be noted that the discharge pipe 10 is made of a soft material that can be bent and stretched to adapt to the lateral movement of the funnel 5. A corrugated pipe can be used here.

[0036] like Figure 2 and Figure 5 As shown, the excavation mechanism 11 includes two vertically arranged lead screws 1101, a mounting plate 1102, a motor 1103, and a ring blade 1104.

[0037] Two lead screws 1101 are symmetrically distributed between the two side columns of the second bracket 7 and the upper surface of the trolley body 1, and are rotatably connected to the trolley body 1 via bearings. The two ends of the mounting plate 1102 are respectively engaged with the two lead screws 1101 via threaded sleeves. To ensure smooth lifting and lowering of the mounting plate 1102, the two lead screws 1101 must rotate synchronously. Therefore, pulleys 12 are fixedly installed at the top of each of the two lead screws 1101, and the two pulleys 12 are connected by a belt 13. A handwheel 14 is also provided at the top of one of the lead screws 1101; the operator can drive the two lead screws 1101 to rotate synchronously by turning the handwheel 14, thereby driving the mounting plate 1102 to rise and fall smoothly in the vertical direction.

[0038] The motor 1103 is fixedly mounted on the mounting plate 1102, with its output shaft pointing vertically downwards. The annular blade 1104 is connected to the output end of the motor 1103. When excavation is required, first ensure that the through hole 4 of the plate 3 is aligned with the circular hole 2, then start the motor 1103 to drive the annular blade 1104 to rotate at high speed. At the same time, crank the handwheel 14 to lower the mounting plate 1102, allowing the annular blade 1104 to pass through the circular hole 2 and the through hole 4 in sequence, cutting into the roadbed soil to complete the excavation operation. The excavated soil sample will remain inside the annular blade 1104 and will be removed after the mounting plate 1102 rises.

[0039] like Figure 2 , Figure 4 and Figure 5As shown, to prevent the funnel 5 from interfering with the trolley body 1 during movement, a long, narrow relief groove 15 is provided on the top of the trolley body 1. The bottom of the funnel 5 is accommodated within this relief groove 15 and can slide along it. Simultaneously, to ensure that loose soil does not enter the relief groove 15 when the plate 3 is in the digging position, a filling block 16 is provided at a corresponding position on the upper surface of the plate 3. When the plate 3 is in the digging position, the filling block 16 precisely fills the remaining space of the relief groove 15, preventing debris from entering the equipment.

[0040] like Figure 1 and Figure 2 As shown, a circular ring 17 is fitted around the outside of the sand storage tank 9. The sensing end of the load cell 8 is connected to multiple pull ropes 18 evenly distributed along its circumference, and the lower ends of all pull ropes 18 are fixedly connected to the circular ring 17. This suspension method ensures that the sand storage tank 9 is subjected to uniform force and is suspended stably, thereby enabling the load cell 8 to accurately measure the total mass of the sand storage tank 9 and the sand inside. By recording the mass difference before and after sand filling, the mass of the sand poured into the test hole can be accurately obtained.

[0041] like Figure 1 , Figure 7 and Figure 8 As shown, the four corners of the trolley body 1 are equipped with height-adjustable support wheels. Specifically, each corner has a downward-facing storage cylinder 19 fixed to it. Inside each storage cylinder 19, a slider 20 is vertically slidably connected, and a roller 21 is mounted on the bottom of the slider 20. A vertical screw 22 is rotatably connected to the top of the slider 20, with its upper end passing through the top of the storage cylinder 19 and threaded into it. When the screw 22 is rotated, it causes the slider 20 to slide up and down within the storage cylinder 19. This allows for adjustment of the trolley body 1's levelness and also enables the rollers 21 to retract into the storage cylinder 19 during inspection, ensuring the trolley body 1 sits securely on the roadbed and preventing equipment movement during operation.

[0042] When using this utility model, first push the device to the detection point, rotate the screw 22 to make the roller 21 retract into the storage cylinder 19, and place the trolley body 1 stably on the roadbed surface.

[0043] Ensure that the plate 3 is aligned with the through hole 4 and the round hole 2 at the digging position. Start the motor 1103 and crank the handwheel 14 to drive the mounting plate 1102 to move the annular blade 1104 downwards, whereby the annular blade 1104 digs the soil. After digging is complete, reverse the handwheel 14 to drive the mounting plate 1102 upwards, remove the soil sample from the annular blade 1104, put it in a bag, and then weigh it using the weighing sensor 8 on the first bracket 6.

[0044] Pull the plate 3 horizontally to move the funnel 5 directly above the circular hole 2. Open valve 23, and the standard sand in the sand storage tank 9 flows into the test hole through the discharge pipe 10 and the funnel 5. After the sand surface stops sinking, close valve 23.

[0045] The data from the weighing sensor 8 is read again to obtain the total mass of the sand storage bucket 9 and the remaining sand. Based on the standard density of the sand and gravel, the volume of the outflowing sand and gravel is determined, thereby determining the size of the test hole, and then the volume of the excavated soil sample. Combined with the measured mass of the soil sample, the compaction degree of the roadbed can be calculated according to relevant standards.

[0046] In summary, the compaction testing equipment for roadbed construction provided by this utility model integrates the traditionally scattered testing steps into one, improving the convenience and efficiency of on-site testing.

[0047] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A compaction testing device for roadbed construction, comprising a trolley body (1), characterized in that, The trolley body (1) has a through hole (2) in the middle. A flat plate (3) is slidably connected inside the trolley body (1). A through hole (4) is provided on the flat plate (3). The through hole (4) can cooperate with the hole (2). A funnel (5) is provided on one side of the flat plate (3). A first bracket (6) and a second bracket (7) are provided at the upper end of the trolley body (1). A weighing sensor (8) is provided on the first bracket (6). A sand storage bucket (9) is suspended below the weighing sensor (8). A discharge pipe (10) is provided at the bottom of the sand storage bucket (9) and located directly above the funnel (5). A digging mechanism (11) is provided on the second bracket (7) for digging the roadbed directly below the hole (2).

2. The compaction testing equipment for roadbed construction according to claim 1, characterized in that, The excavation mechanism (11) includes two lead screws (1101) symmetrically distributed between the second support (7) and the trolley body (1). The two lead screws (1101) rotate synchronously. The second support (7) is provided with a mounting plate (1102) that cooperates with the two lead screws (1101). The mounting plate (1102) is provided with a motor (1103). The output end of the motor (1103) is provided with an annular blade (1104). The annular blade (1104) can pass through the round hole (2) and the through hole (4).

3. The compaction testing equipment for roadbed construction according to claim 2, characterized in that, Both of the lead screws (1101) are provided with pulleys (12) at the top, and a belt (13) is sleeved between the two pulleys (12).

4. The compaction testing equipment for roadbed construction according to claim 2, characterized in that, One of the lead screws (1101) has a handwheel (14) on top.

5. The compaction testing equipment for roadbed construction according to claim 1, characterized in that, The trolley body (1) has a clearance groove (15) on the top, the bottom of the funnel (5) is located in the clearance groove (15), and the upper end of the plate (3) is provided with a filling block (16) located in the clearance groove (15).

6. The compaction testing equipment for roadbed construction according to claim 1, characterized in that, The sand storage tank (9) is fitted with a ring (17) on the outside, and the weighing sensor (8) is provided with a plurality of pull ropes (18) evenly distributed along its circumference, and the free end of each pull rope (18) is fixed to the ring (17).

7. The compaction testing equipment for roadbed construction according to claim 1, characterized in that, The four corners of the trolley body (1) are provided with storage tubes (19) with downward openings. Each storage tube (19) is vertically connected to a slider (20). The bottom of the slider (20) is provided with a roller (21). The top of the slider (20) is rotatably connected to a screw (22). The screw (22) is threadedly engaged with the top of the storage tube (19).

8. The compaction testing equipment for roadbed construction according to claim 1, characterized in that, A valve (23) is provided between the discharge pipe (10) and the sand storage tank (9).

Images