Sampling device for roadbed compactness detection

Abstract

The utility model relates to the technical field of roadbed detection, in particular to a sampling device for roadbed compactness detection, which comprises a support plate, a limit frame and a sampling mechanism, the sampling mechanism comprises a lifting plate, a power device, a rotating rod and a spiral piece, sliding grooves are arranged on two side walls inside the limit frame, the lifting plate is in sliding fit with the sliding grooves, and the spiral piece is arranged in the limit frame. The power device is arranged on the lifting plate, the output end of the power device penetrates through the lifting plate to be connected with the rotating rod, and the spiral piece is arranged on the rotating rod. Through holes are formed in the supporting plate, and the projection of the spiral piece on the horizontal plane is located between the through holes. A pressure applying mechanism is arranged at the rear end of the lifting plate and controls height adjustment of the lifting plate. The side wall of the limiting frame is sleeved with a scale indication frame, the scale indication frame is fixedly connected with the lifting plate, and scale marks are arranged on the side wall, located on one side of the scale indication frame, of the limiting frame. According to the utility model, accurate sampling of roadbed material samples with different depths can be realized, and the accuracy and the reliability of compaction degree detection can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of subgrade detection, in particular to a sampling device for subgrade compaction degree detection. Background Art

[0002] The subgrade is the foundation of the track or road surface, and is a geotechnical structure formed by excavation or filling. The subgrade compaction degree refers to the ratio of the dry density of the soil or other road-building materials after compaction to the standard maximum dry density, expressed as a percentage. The subgrade compaction degree is one of the key indicators for the construction quality detection of subgrade and road surface, and represents the density condition after on-site compaction.

[0003] At present, for the method of sampling and detecting the subgrade compaction degree of highways, generally the sand replacement method by digging pits is used for sampling and detection. After manual positioning, tools such as hammers and picks are used to dig pits, the subgrade in the pits is knocked and crushed for collection, and then sand is filled and weighed for calculation.

[0004] However, when conducting multiple detections, it is time-consuming and laborious as a whole, with a large labor intensity and low efficiency. Moreover, the sampling depth cannot be accurately controlled, resulting in the obtained samples being unable to accurately reflect the subgrade compaction conditions at specific depths. Content of the Utility Model

[0005] The utility model aims to solve at least one of the technical problems existing in the prior art. For this purpose, the utility model provides a sampling device for subgrade compaction degree detection. The sampling device drives the rotating rod to rotate through a power device, and then drives the spiral blade to rotate in the subgrade, gradually taking out the subgrade material sample, thereby improving the working efficiency. At the same time, through the sliding cooperation between the lifting plate and the sliding groove and the precise alignment between the scale indicating frame and the scale line, accurate sampling of subgrade material samples at different depths can be realized, which helps to improve the accuracy and reliability of compaction degree detection.

[0006] To achieve the above object, according to an embodiment of the first aspect of the present utility model, a sampling device for detecting the compaction degree of a roadbed is proposed, which includes a support plate, a limiting frame and a sampling mechanism. Support frames are fixedly arranged on both sides of the support plate. The limiting frame is arranged on the support plate, and reinforcing rods are connected between the side walls on both sides of the limiting frame and the support frames. The sampling mechanism includes a lifting plate, a power device, a rotating rod and a spiral blade. Chutes are arranged on the inner side walls on both sides inside the limiting frame. The lifting plate is slidably matched with the chutes. The power device is arranged on the lifting plate, and the output end of the power device penetrates through the lifting plate and is connected to the rotating rod. The spiral blade is arranged on the rotating rod. A through hole is formed in the support plate, and the projection of the spiral blade on the horizontal plane is located between the through holes. A pressing mechanism is arranged at the rear end of the lifting plate, and the pressing mechanism controls the height adjustment of the lifting plate. A scale indicating frame is sleeved on the side wall of the limiting frame, and the scale indicating frame is fixedly connected with the lifting plate. Scale lines are arranged on the side wall of the limiting frame on one side of the scale indicating frame.

[0007] As a further scheme of the present utility model: The pressing mechanism includes an upper auxiliary plate, a lower auxiliary plate and a lead screw. The upper auxiliary plate is fixedly arranged on the rear side wall of the limiting frame. The lower auxiliary plate is arranged below the upper auxiliary plate and is fixedly connected with the rear side wall of the limiting frame. One end of the lead screw penetrates through the upper auxiliary plate and is rotatably arranged on the lower auxiliary plate. The rear end of the lifting plate is threadedly connected with the lead screw, and a rotating handle is arranged at the top of the lead screw.

[0008] As a further scheme of the present utility model: A butt joint pipe is arranged in the through hole. A connecting ring is arranged above the butt joint pipe. A plurality of springs are arranged between the bottom of the connecting ring and the top of the support plate. A storage cylinder is arranged above the connecting ring. A blocking pipe is arranged inside the storage cylinder, and the inner diameter size of the blocking pipe is adapted to that of the butt joint pipe.

[0009] As a further scheme of the present utility model: A buffer pad is arranged on the inner top of the limiting frame, and the buffer pad buffers the top of the power device.

[0010] As a further scheme of the present utility model: A connecting groove is arranged at the upper end of the connecting ring, and a strong magnetic connecting block is arranged at the bottom of the storage cylinder. The strong magnetic connecting block is adapted to the connecting groove.

[0011] Compared with the prior art, the beneficial effects of the present utility model are:

[0012] 1. The utility model drives the rotating rod to rotate through the power device, and then drives the spiral blade to rotate in the roadbed, gradually taking out the roadbed material sample. At the same time, through the sliding fit between the lifting plate and the sliding groove and the precise alignment between the scale indicating frame and the scale line, accurate sampling of roadbed material samples at different depths can be achieved, which helps to improve the accuracy and reliability of compaction degree detection.

[0013] 2. By rotating the rotating handle of the utility model, the lead screw is driven to rotate. Through the threaded connection between the lifting plate and the lead screw, the height of the lifting plate can be accurately adjusted. This not only improves the accuracy of sampling, but also makes the sampling process more flexible and controllable.

[0014] 3. By setting the abutting pipe, when drilling and sampling, the lower end of the abutting pipe abuts against the roadbed surface. At this time, the abutting spring is in a stretched state. Under the action of the abutting spring, it is ensured that the lower end of the abutting pipe is in close contact with the roadbed, effectively avoiding the loss of soil samples during the drilling and sampling process and ensuring the accuracy of subsequent compaction degree detection. At the same time, the cooperation between the connecting groove and the strong magnetic connecting block ensures the stability of the storage cylinder while facilitating the subsequent taking of the storage cylinder, making it convenient for the operator to obtain the soil sample in the storage cylinder. Description of the Drawings

[0015] Figure 1 It is a three-dimensional structural schematic diagram of a sampling device for roadbed compaction degree detection.

[0016] Figure 2 It is Figure 1 The partial enlarged view at A in

[0017] Figure 3 It is a schematic diagram of the installation of the pressing mechanism.

[0018] Figure 4 It is a sectional view of the installation of the abutting pipe.

[0019] Figure 5 It is Figure 4 The partial enlarged view at B in

[0020] Figure 6 It is a three-dimensional structural schematic diagram of the abutting pipe.

[0021] Figure 7 It is a three-dimensional structural schematic diagram of the storage cylinder.

[0022] Reference numerals in the drawings: 1, support plate; 2, support frame; 3, limit frame; 4, reinforcing rod; 5, buffer pad; 6, chute; 7, lifting plate; 8, power device; 9, rotating rod; 10, spiral blade; 11, scale line; 12, upper auxiliary plate; 13, lower auxiliary plate; 14, lead screw; 15, rotary handle; 16, scale indicating frame; 17, abutting pipe; 18, storage cylinder; 19, blocking pipe; 20, connecting ring; 21, spring; 22, through hole; 23, connecting groove; 24, strong magnetic connecting block. Detailed implementation manners

[0023] The technical solutions of the present utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0024] As Figures 1 to 7 shown, a sampling device for subgrade compaction degree detection includes a support plate 1, a limit frame 3 and a sampling mechanism. The two sides of the support plate 1 are fixedly provided with support frames 2. The limit frame 3 is arranged on the support plate 1, and reinforcing rods 4 are connected between the side walls on both sides of the limit frame 3 and the support frames 2. The sampling mechanism includes a lifting plate 7, a power device 8, a rotating rod 9 and a spiral blade 10. Chutes 6 are arranged on the inner side walls of both sides of the limit frame 3. The lifting plate 7 is slidably matched with the chutes 6. The power device 8 is arranged on the lifting plate 7, and the output end of the power device 8 penetrates through the lifting plate 7 and is connected to the rotating rod 9. The spiral blade 10 is arranged on the rotating rod 9. Through holes 22 are formed in the support plate 1. The projection of the spiral blade 10 on the horizontal plane is located between the through holes 22. A pressing mechanism is arranged at the rear end of the lifting plate 7, and the pressing mechanism controls the height adjustment of the lifting plate 7. A scale indicating frame 16 is sleeved on the side wall of the limit frame 3. The scale indicating frame 16 is fixedly connected to the lifting plate 7. Scale lines 11 are arranged on the side wall of the limit frame 3 on one side of the scale indicating frame 16.

[0025] By controlling the lifting of the lifting plate 7 through the pressing mechanism and observing the alignment of the scale lines 11 on the scale indicating frame 16 and the scale lines 11 on the side wall of the limit frame 3, the depth of the spiral blade 10 descending can be accurately controlled. The power device 8 is preferably a rotary motor. The power device 8 drives the rotating rod 9 to rotate, and then drives the spiral blade 10 to rotate in the subgrade to gradually take out the subgrade material sample. Through the sliding fit of the lifting plate 7 and the chutes 6 and the accurate alignment of the scale indicating frame 16 and the scale lines 11, accurate sampling of subgrade material samples at different depths can be realized, which helps to improve the accuracy and reliability of the compaction degree detection.

[0026] The pressure - applying mechanism includes an upper auxiliary plate 12, a lower auxiliary plate 13 and a lead screw 14. The upper auxiliary plate 12 is fixedly arranged on the rear - end side wall of the limit frame 3. The lower auxiliary plate 13 is arranged below the upper auxiliary plate 12 and is fixedly connected to the rear - end side wall of the limit frame 3. One end of the lead screw 14 penetrates through the upper auxiliary plate 12 and is rotatably arranged on the lower auxiliary plate. The rear end of the lifting plate 7 is threadedly connected to the lead screw 14, and a rotary handle 15 is arranged at the top of the lead screw 14.

[0027] By rotating the rotary handle 15, the lead screw 14 is driven to rotate. Through the threaded connection between the lifting plate 7 and the lead screw 14, the precise adjustment of the height of the lifting plate 7 is realized. This not only improves the accuracy of sampling but also makes the sampling process more flexible and controllable.

[0028] A butt - joint pipe 17 is arranged in the through - hole 22. A connecting ring 20 is arranged above the butt - joint pipe 17. A plurality of springs 21 are arranged between the bottom of the connecting ring 20 and the top of the support plate 1. A storage cylinder 18 is arranged above the connecting ring 20. A blocking pipe 19 is arranged inside the storage cylinder 18. The inner diameter of the blocking pipe 19 is adapted to the butt - joint pipe 17. A connecting groove 23 is arranged at the upper end of the connecting ring 20. A strong magnetic connection block 24 is arranged at the bottom of the storage cylinder 18, and the strong magnetic connection block 24 is adapted to the connecting groove 23.

[0029] By arranging the butt - joint pipe 17, during drilling and sampling, the lower end of the butt - joint pipe 17 abuts against the roadbed surface. At this time, the butt - joint spring 21 is in a stretched state. Under the action of the butt - joint spring 21, it is ensured that the lower end of the butt - joint pipe 17 is closely attached to the roadbed, effectively avoiding the loss of soil samples during the drilling and sampling process and ensuring the accuracy of subsequent compaction degree detection. At the same time, the cooperation of the connecting groove 23 and the strong magnetic connection block 24 ensures the stability of the storage cylinder 18 while facilitating the subsequent taking of the storage cylinder 18, making it convenient for the operator to obtain the soil samples in the storage cylinder 18.

[0030] A buffer pad 5 is arranged at the inner top of the limit frame 3, and the buffer pad 5 buffers the top of the power device 8.

[0031] Working principle of the utility model: When in use, move the device to the designated position, place the position to be sampled inside the abutting pipe 17. The lower end of the abutting pipe 17 abuts against the upper surface of the roadbed. At this time, the spring 21 is in a stretched state. Under the action of the spring 21, it is ensured that the lower end of the abutting pipe 17 is in close contact with the roadbed, effectively avoiding the loss of soil samples during the drilling and sampling process and ensuring the accuracy of subsequent compaction degree detection. Open the power device 8, use the power device 8 to drive the rotating rod 9 to rotate, and then drive the spiral blade 10 on the rotating rod 9 to rotate. Then, drive the screw rod 14 to rotate by rotating the rotating handle 15, and then drive the lifting plate 7, the power device 8 and the spiral blade 10 to move up and down. When the spiral blade 10 passes through the blocking pipe 19 and the abutting pipe 17 and contacts the roadbed, the drilling and sampling operation is carried out. The soil sample during drilling is lifted into the storage cylinder 18 as the spiral blade 10 rotates, and the space between the storage cylinder 18 and the blocking pipe 19 is used to store the soil sample. During the drilling and sampling, the sampling depth is understood by using the position of the scale indicating frame 16 and the scale line 11 to ensure that the sampling depth can meet the detection requirements. When the drilling depth meets the requirements, rotate the rotating handle 15 in the reverse direction, use the screw rod 14 to lift the lifting plate 7, the power device 8 and the spiral blade 10 above the storage cylinder 18. After the construction personnel clean the soil sample on the spiral blade 10, remove the storage cylinder 18, collect and weigh the soil sample in the storage cylinder 18, and then continue the subsequent experimental operation of the roadbed compaction degree detection by using the sand filling operation.

[0032] The above embodiments are only used to illustrate the technical method of the utility model and not to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical method of the utility model can be modified or equivalently replaced without departing from the spirit and scope of the technical method of the utility model.

Claims

1. A sampling device for detecting the compaction degree of subgrade, comprising a support plate (1), a limit frame (3) and a sampling mechanism. The two sides of the support plate (1) are fixedly provided with support frames (2). The limit frame (3) is arranged on the support plate (1), and reinforcing rods (4) are connected between the side walls on both sides of the limit frame (3) and the support frames (2). It is characterized in that The sampling mechanism includes a lifting plate (7), a power device (8), a rotating rod (9) and a spiral blade (10). Slide grooves (6) are arranged on the inner side walls of both sides inside the limit frame (3). The lifting plate (7) is slidably matched with the slide grooves (6). The power device (8) is arranged on the lifting plate (7), and the output end of the power device (8) penetrates through the lifting plate (7) and is connected to the rotating rod (9). The spiral blade (10) is arranged on the rotating rod (9). A through hole (22) is formed in the support plate (1). The projection of the spiral blade (10) on the horizontal plane is located between the through holes (22). A pressure applying mechanism is arranged at the rear end of the lifting plate (7), and the pressure applying mechanism controls the height adjustment of the lifting plate (7). A scale indicating frame (16) is sleeved on the side wall of the limit frame (3), and the scale indicating frame (16) is fixedly connected to the lifting plate (7). Scale lines (11) are arranged on the side wall of the limit frame (3) on one side of the scale indicating frame (16).

2. The sampling device for subgrade compactness detection according to claim 1, characterized in that, The pressure applying mechanism includes an upper auxiliary plate (12), a lower auxiliary plate (13) and a lead screw (14). The upper auxiliary plate (12) is fixedly arranged on the rear side wall of the limit frame (3). The lower auxiliary plate (13) is arranged below the upper auxiliary plate (12) and is fixedly connected to the rear side wall of the limit frame (3). One end of the lead screw (14) penetrates through the upper auxiliary plate (12) and is rotatably arranged on the lower auxiliary plate. The rear end of the lifting plate (7) is threadedly connected to the lead screw (14). A rotating handle (15) is arranged at the top of the lead screw (14).

3. The sampling device for subgrade compaction degree detection according to claim 1, characterized in that, A butt joint pipe (17) is arranged in the through hole (22). A connecting ring (20) is arranged above the butt joint pipe (17). A plurality of springs (21) are arranged between the bottom of the connecting ring (20) and the top of the support plate (1). A storage cylinder (18) is arranged above the connecting ring (20). A blocking pipe (19) is arranged inside the storage cylinder (18), and the inner diameter of the blocking pipe (19) is adapted to the butt joint pipe (17).

4. The sampling device for subgrade compaction degree detection according to claim 1, characterized in that, A buffer pad (5) is arranged at the inner top of the limit frame (3), and the buffer pad (5) buffers the top of the power device (8).

5. The sampling device for subgrade compactness detection according to claim 3, characterized in that, A connecting groove (23) is arranged at the upper end of the connecting ring (20). A strong magnetic connecting block (24) is arranged at the bottom of the storage cylinder (18), and the strong magnetic connecting block (24) is adapted to the connecting groove (23).

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