Rock-filled concrete compactness detection device

Abstract

The invention discloses a rock-fill concrete compactness detection device, and relates to the technical field of rock-fill concrete detection.The rock-fill concrete compactness detection device comprises a shell and a detection assembly, the top of the shell is connected with a lifting assembly, and the detection assembly is arranged in the shell; the detection assembly comprises a second motor, a second bevel gear set, a reciprocating lead screw, a driving block, a sliding seat, a guide frame, a reset spring, an ultrasonic transducer and an ultrasonic sensor, the second motor is fixed in the shell, and the end of the second motor is connected with the second bevel gear set. When the compactness of rock-fill concrete is detected, two detection devices need to be respectively arranged in two detection holes pre-formed in the rock-fill concrete, at the moment, a first motor drives a screw sleeve to rotate through a first bevel gear set, and a polished rod limits rotation of a first screw rod, so that the first screw rod can move up and down; therefore, the height during detection is adjusted.

Description

Technical Field

[0001] The present invention relates to the technical field of rockfill concrete detection, and particularly to a device for detecting the compactness of rockfill concrete. Background Technique

[0002] The rockfill concrete construction technology refers to directly stacking large-sized rubble into the bin, and then pouring special self-compacting concrete without any vibration from the surface of the rockfill body. By relying on the characteristics of high fluidity and high penetrability of the special self-compacting concrete, the voids of the rockfill are completely filled by its own weight, forming a large-volume concrete that is complete, dense, has low hydration heat, and meets the strength requirements.

[0003] Currently, when detecting the compactness of rockfill concrete, the core drilling method is usually used, that is, a core drill is used to drill a core sample in the rockfill concrete and then the sample is detected. However, in the actual detection process, the detection result of the sample only reflects a small part of the rockfill concrete, and the overall coverage range of the sample is small, resulting in a general overall detection effect.

[0004] Therefore, in view of this, research and improvement are carried out on the existing structure and deficiencies, and a device for detecting the compactness of rockfill concrete is proposed. Summary of the Invention

[0005] The purpose of the present invention is to provide a device for detecting the compactness of rockfill concrete to solve the problems raised in the above background technique.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A device for detecting the compactness of rockfill concrete, including a housing and a detection component. A lifting component is connected to the top of the housing. The detection component is arranged inside the housing. The detection component includes a second motor, a second bevel gear set, a reciprocating lead screw, a driving block, a sliding seat, a guiding frame, a return spring, an ultrasonic transducer, and an ultrasonic sensor. A second motor is fixed inside the housing, and a second bevel gear set is connected to the end of the second motor. A reciprocating lead screw is arranged inside the second bevel gear set, and a driving block is sleeved outside the reciprocating lead screw. The bottom of the driving block is slidably connected to a sliding seat, and the middle of the sliding seat is slidably connected to a guiding frame. A return spring is sleeved outside one end of the guiding frame. The number of guiding frames is two, and an ultrasonic transducer is fixed to one side of the lower part of one of the guiding frames, and an ultrasonic sensor is arranged on one side of the lower part of the other guiding frame.

[0007] Further, the lifting component includes a smooth rod, a bracket, and a first motor. A smooth rod is arranged on the top of the housing, and a bracket is slidably connected to the outer side of the upper end of the smooth rod. One end of the top of the bracket is fixed with a first motor.

[0008] Further, the lifting assembly further includes a first bevel gear set, a screw sleeve, and a first screw rod. One end of the first motor is provided with the first bevel gear set, and a screw sleeve is fixed inside one end of the first bevel gear set. The screw sleeve is rotatably connected to the bracket, and a first screw rod is threadedly connected inside the screw sleeve, and the first screw rod is rotatably connected to the housing.

[0009] Further, one end of the top of the guide frame is connected with a mounting plate, and the mounting plate is rotatably connected to the reciprocating lead screw. And mounting holes are equidistantly arranged along the circumference on the bottom surface of the mounting plate and the bottom surface of the housing.

[0010] Further, a coupling assembly is arranged inside the housing. The coupling assembly includes a glue storage tank, a first one-way valve, and a fixed cylinder. The glue storage tank is fixed inside the housing, and a first one-way valve is arranged at the lower end of one side of the glue storage tank. One end of the first one-way valve is connected with the fixed cylinder, and the fixed cylinder is fixedly connected to the housing.

[0011] Further, the coupling assembly further includes a piston rod, a support rod, a second one-way valve, and a shunt pipe. The piston rod is slidably connected inside the fixed cylinder, and a support rod is fixed at the top of the piston rod. The support rod is fixedly connected to the driving block and is slidably connected to the housing. A second one-way valve is arranged at the front end of the lower part of the fixed cylinder, and a shunt pipe is connected to the front end of the second one-way valve.

[0012] Further, the coupling assembly further includes a glue outlet sleeve, an overflow hole, a guide rod, and a buffer spring. The bottom of the shunt pipe is connected to the glue outlet sleeve through a pipeline, and an overflow hole is arranged at the top of the glue outlet sleeve. A guide rod is arranged at one side of the glue outlet sleeve and is slidably connected to the sliding seat, and a buffer spring is arranged at one side of the sliding seat.

[0013] Further, a stabilizing assembly is arranged at the upper end inside the housing. The stabilizing assembly includes a first end gear ring, a second end gear ring, and a compression spring. The top of the reciprocating lead screw is fixedly connected with the first end gear ring, and the second end gear ring is slidably connected to the top of the first end gear ring, and a compression spring is arranged at the top of the second end gear ring.

[0014] Further, the stabilizing assembly further includes a guide post, a second screw rod, and an adjusting sleeve. The guide post is slidably connected inside the second end gear ring, and the guide post is rotatably connected to the reciprocating lead screw. The top of the guide post is fixedly connected with the second screw rod, and the second screw rod is rotatably connected to the housing, and an adjusting sleeve is threadedly connected to the outer side of the upper end of the second screw rod.

[0015] Further, the stabilizing assembly further includes a connecting rod, a sliding rod, and a pulley. The outer side of the adjusting sleeve is rotatably connected with the connecting rod, and the end of the connecting rod is rotatably connected with the sliding rod. The sliding rod is slidably connected to the housing, and a pulley is rotatably connected inside one end of the sliding rod.

[0016] The present invention provides a device for detecting the compactness of rockfill concrete, which has the following beneficial effects: 1. When detecting the compactness of rockfill concrete, two detection devices need to be respectively placed in two detection holes pre-opened in the rockfill concrete. At this time, the first motor drives the screw sleeve to rotate through the first bevel gear set, and the smooth rod restricts the self-rotation of the first screw rod. Therefore, the first screw rod can move up and down to adjust the height during detection, and the scale bar outside the smooth rod facilitates observing the height of the housing, so that the detection positions of the two detection devices are consistent. After that, just start the second motor, and it can drive the reciprocating lead screw to rotate through the second bevel gear set, making the driving block move downward, thus squeezing the sliding seat to move horizontally under the guidance of the guide frame. The ultrasonic transducer and the ultrasonic sensor will be in contact with the inner wall of the detection hole, so that the ultrasonic transducers and the ultrasonic sensors in the two detection holes correspond to each other. Since ultrasonic waves propagate faster in materials with higher compactness, the propagation speed of ultrasonic waves can be used to judge the compactness of rockfill concrete. At the same time, different heights of rockfill concrete can be detected during detection, further expanding the detection range. Moreover, the guide frame is fixed to the bottom of the housing and the mounting plate through bolts and mounting holes, so the orientations of the ultrasonic transducer and the ultrasonic sensor can also be adjusted according to needs, or the ultrasonic transducer and the ultrasonic sensor can be added or reduced, so as to use multiple detection devices to detect between multiple detection holes at the same time, further improving the use range of the detection device.

[0017] 2. The present invention can use the support rod to limit the rotation direction of the driving block. Therefore, when the reciprocating lead screw rotates, the height of the driving block can be controlled. And when the driving block moves downward, it will also drive the piston rod to move downward, and the coupling agent in the fixed cylinder can be transported to the flow channel of the glue outlet sleeve through the second one-way valve and the shunt pipe and flow out from the inner through hole, so as to spray the ends of the ultrasonic transducer and the ultrasonic sensor. And when the sliding seat drives the glue outlet sleeve to move through the buffer spring and is in contact with the inner wall of the detection hole, the buffer spring will be compressed, and at the same time, the ultrasonic transducer and the ultrasonic transducer will slide inside the glue outlet sleeve, so as to squeeze the internal coupling agent, and the excess coupling agent will be discharged from the overflow hole. Therefore, during the detection process, the coupling agent can be automatically used to fill the gap between the ultrasonic transducer, the ultrasonic sensor and the inner wall of the detection hole, which is beneficial to improving the detection accuracy. And when the driving block moves upward as the reciprocating lead screw continues to rotate, the piston rod will also move upward synchronously inside the fixed cylinder. At this time, the coupling agent in the glue storage tank will be replenished into the fixed cylinder through the first one-way valve and can be reused. And multiple interfaces are provided at the lower end of the shunt pipe to meet different use requirements.

[0018] 3. When the housing is placed in the detection hole and the second motor is started to rotate the reciprocating lead screw, the compression spring will push the second end gear ring at this time, making it close to the first end gear ring. Therefore, when rotating, the second screw can be driven to rotate through the guide post, causing the adjusting sleeve to move upward. Then the connecting rod will push the slide rod, making the pulley fit against the inner wall of the detection hole, which is beneficial to keeping the housing stable. Thus, during the detection process, the situation of shaking and offset at the lower part of the device can be avoided. And when the pulley fits against the inner wall of the detection hole, the second end gear ring will receive a large resistance in the rotation direction. At this time, when the first end gear ring rotates, an upward component force can be provided through its inclined surface to squeeze the compression spring, so that sliding occurs between the second end gear ring and the first end gear ring, preventing the situation of movement interference with the detection component. Therefore, before the detection component conducts detection, the housing will be automatically stabilized, further improving the detection accuracy. Description of the Drawings

[0019] Figure 1 is an overall three-dimensional structural schematic diagram of a rockfill concrete density detection device of the present invention; Figure 2 is an internal structural schematic diagram of the housing of a rockfill concrete density detection device of the present invention; Figure 3 is a three-dimensional structural schematic diagram of the detection component of a rockfill concrete density detection device of the present invention; Figure 4 is a bottom view structural schematic diagram of the housing of a rockfill concrete density detection device of the present invention; Figure 5 is a three-dimensional structural schematic diagram of the coupling component of a rockfill concrete density detection device of the present invention; Figure 6 is a partial sectional structural schematic diagram of the stability component of a rockfill concrete density detection device of the present invention; Figure 7 is a three-dimensional structural schematic diagram of the second end gear disc of a rockfill concrete density detection device of the present invention.

[0020] In the figure: 1. Housing; 2. Lifting assembly; 201. Polished rod; 202. Bracket; 203. First motor; 204. First bevel gear set; 205. Nut sleeve; 206. First screw rod; 3. Detection assembly; 301. Second motor; 302. Second bevel gear set; 303. Reciprocating lead screw; 304. Driving block; 305. Slide seat; 306. Guide frame; 307. Return spring; 308. Ultrasonic transducer; 309. Ultrasonic sensor; 4. Mounting plate; 5. Mounting hole; 6. Coupling assembly; 601. Glue storage tank; 602. First one-way valve; 603. Fixed cylinder; 604. Piston rod; 605. Support rod; 606. Second one-way valve; 607. Diverging pipe; 608. Glue outlet sleeve; 609. Overflow hole; 610. Guide rod; 611. Buffer spring; 7. Stabilizing assembly; 701. First end tooth ring; 702. Second end tooth ring; 703. Compression spring; 704. Guide post; 705. Second screw rod; 706. Adjusting sleeve; 707. Connecting rod; 708. Slide bar; 709. Pulley. Detailed implementation

[0021] Please refer to Figures 1 to 7 As shown in the figure, the present invention provides a technical solution: a detection device for the compactness of rockfill concrete, including a housing 1 and a detection assembly 3. A lifting assembly 2 is connected to the top of the housing 1, and the detection assembly 3 is arranged inside the housing 1. The detection assembly 3 includes a second motor 301, a second bevel gear set 302, a reciprocating lead screw 303, a driving block 304, a slide seat 305, a guide frame 306, a return spring 307, an ultrasonic transducer 308 and an ultrasonic sensor 309. A second motor 301 is fixed inside the housing 1, and a second bevel gear set 302 is connected to the end of the second motor 301. A reciprocating lead screw 303 is arranged inside the second bevel gear set 302, and a driving block 304 is sleeved on the outer side of the reciprocating lead screw 303. The bottom of the driving block 304 is slidably connected to a slide seat 305, and the middle of the slide seat 305 is slidably connected to a guide frame 306. A return spring 307 is sleeved on the outer side of one end of the guide frame 306. The number of the guide frames 306 is two, and an ultrasonic transducer 308 is fixed on one side of the lower part of one of the guide frames 306, and an ultrasonic sensor 309 is arranged on one side of the lower part of the other guide frame 306.

[0022] Please refer to Figures 1 to 5, the lifting assembly 2 includes a light rod 201, a bracket 202 and a first motor 203. The light rod 201 is arranged at the top of the housing 1, and the upper outer side of the light rod 201 is slidably connected to the bracket 202. One end of the top of the bracket 202 is fixed with the first motor 203. The lifting assembly 2 further includes a first bevel gear set 204, a screw sleeve 205 and a first screw rod 206. One end of the first motor 203 is provided with the first bevel gear set 204, and the first bevel gear set 204 is fixedly provided with the screw sleeve 205 inside one end. The screw sleeve 205 is rotatably connected to the bracket 202, and the first screw rod 206 is threadedly connected inside the screw sleeve 205. The first screw rod 206 is rotatably connected to the housing 1. One end of the top of the guide frame 306 is connected to the mounting plate 4, and the mounting plate 4 is rotatably connected to the reciprocating lead screw 303. The bottom surface of the mounting plate 4 and the bottom surface of the housing 1 are both provided with mounting holes 5 at equal intervals along the circumference. A coupling assembly 6 is arranged inside the housing 1. The coupling assembly 6 includes a glue storage tank 601, a first one-way valve 602 and a fixed cylinder 603. The glue storage tank 601 is fixed inside the housing 1, and the first one-way valve 602 is arranged at the lower end of one side of the glue storage tank 601. One end of the first one-way valve 602 is connected to the fixed cylinder 603, and the fixed cylinder 603 is fixedly connected to the housing 1. The coupling assembly 6 further includes a piston rod 604, a support rod 605, a second one-way valve 606 and a shunt pipe 607. The piston rod 604 is slidably connected inside the fixed cylinder 603, and the support rod 605 is fixed at the top of the piston rod 604. The support rod 605 is fixedly connected to the driving block 304, and the support rod 605 is slidably connected to the housing 1. The second one-way valve 606 is arranged at the front end of the lower part of the fixed cylinder 603, and the shunt pipe 607 is connected to the front end of the second one-way valve 606. The coupling assembly 6 further includes a glue outlet sleeve 608, an overflow hole 609, a guide rod 610 and a buffer spring 611. The bottom of the shunt pipe 607 is connected to the glue outlet sleeve 608 through a pipeline, and the overflow hole 609 is opened at the top of the glue outlet sleeve 608. The guide rod 610 is arranged at one side of the glue outlet sleeve 608, and the guide rod 610 is slidably connected to the sliding seat 305. A buffer spring 611 is arranged at one side of the sliding seat 305; The specific operations are as follows. First, fix the guide frame 306 to the bottoms of the housing 1 and the mounting plate 4 through bolts and the mounting holes 5. During this process, the orientations of the ultrasonic transducer 308 and the ultrasonic sensor 309 can also be adjusted according to requirements, or the ultrasonic transducer 308 and the ultrasonic sensor 309 can be added or reduced, so as to use multiple detection devices to detect between multiple detection holes simultaneously. Then, place the housings 1 of the multiple detection devices into different detection holes respectively. At this time, the first motor 203 drives the screw sleeve 205 to rotate through the first bevel gear set 204, and the optical rod 201 restricts the self-rotation of the first screw rod 206. Therefore, the first screw rod 206 can move up and down, so as to adjust the height during detection, and the height of the housing 1 can be conveniently observed through the scale bar on the outer side of the optical rod 201, so that the detection positions of each detection device are consistent. Then, start the second motor 301, and it can drive the reciprocating lead screw 303 to rotate through the second bevel gear set 302. At this time, use the support rod 605 to limit the rotation direction of the driving block 304. Therefore, when the reciprocating lead screw 303 rotates, the height of the driving block 304 can be controlled. And when the driving block 304 moves down, it will also drive the piston rod 604 to move down, and the coupling agent inside the fixed cylinder 603 can be transported to the flow channel of the glue outlet sleeve 608 through the second one-way valve 606 and the shunt pipe 607 and flow out from the inner through hole, so as to spray the ends of the ultrasonic transducer 308 and the ultrasonic sensor 309. At the same time, the driving block 304 will squeeze the sliding seat 305 to make it move horizontally under the guidance of the guide frame 306. The sliding seat 305 will drive the glue outlet sleeve 608 to move through the buffer spring 611. After fitting with the inner wall of the detection hole, the buffer spring 611 will be compressed. At the same time, the ultrasonic transducer 308 and the ultrasonic transducer 308 will slide inside the glue outlet sleeve 608, so as to squeeze the internal coupling agent, and the excess coupling agent will be discharged from the overflow hole 609. Therefore, during the detection process, the coupling agent can be automatically used to fill the gap between the ultrasonic transducer 308, the ultrasonic sensor 309 and the inner wall of the detection hole, which is beneficial to improving the accuracy during detection. And because the ultrasonic transducers 308 and the ultrasonic sensors 309 in the two detection holes correspond to each other, and ultrasonic waves propagate faster in materials with higher density, the density of the rockfill concrete can be judged by using the propagation speed of ultrasonic waves. At the same time, different heights of the rockfill concrete can also be detected during detection, further expanding the detection range. When the detection is completed, control the reciprocating lead screw 303 to continue to rotate again, so that the driving block 304 moves up, and the piston rod 604 will also move up synchronously inside the fixed cylinder 603. At this time, the coupling agent inside the glue storage tank 601 will be replenished into the fixed cylinder 603 through the first one-way valve 602 and can be reused. And the reset spring 307 will push the sliding seat 305 to reset it. Then, change the height of the housing 1 through the lifting assembly 2, and repeat the above detection steps, and the multiple heights of the detection hole can be detected, further expanding the detection range of the rockfill concrete density detection.

[0023] Please refer to Figure 3 、 Figures 6 to 7 As shown in FIGS. Figure 3 and Figures 6 to 7 , a stabilizing assembly 7 is provided at the upper end inside the housing 1. The stabilizing assembly 7 includes a first end gear ring 701, a second end gear ring 702, and a compression spring 703. A first end gear ring 701 is fixed to the top of the reciprocating lead screw 303, and a second end gear ring 702 is slidably connected to the top of the first end gear ring 701, and a compression spring 703 is provided at the top of the second end gear ring 702. The stabilizing assembly 7 further includes a guide post 704, a second screw 705, and an adjusting sleeve 706. A guide post 704 is slidably connected inside the second end gear ring 702, and the guide post 704 is rotatably connected to the reciprocating lead screw 303. A second screw 705 is fixed to the top of the guide post 704, and the second screw 705 is rotatably connected to the housing 1, and an adjusting sleeve 706 is threadedly connected to the outer side of the upper end of the second screw 705. The stabilizing assembly 7 further includes a connecting rod 707, a sliding rod 708, and a pulley 709. A connecting rod 707 is rotatably connected to the outer side of the adjusting sleeve 706, and an end of the connecting rod 707 is rotatably connected to a sliding rod 708. The sliding rod 708 is slidably connected to the housing 1, and a pulley 709 is rotatably connected inside one end of the sliding rod 708; The specific operation is as follows. When the second motor 301 is started, the reciprocating lead screw 303 can be driven to rotate through the second bevel gear set 302. At this time, the compression spring 703 will push the second end gear ring 702 to make it close to the first end gear ring 701. Therefore, the second screw 705 can be driven to rotate through the guide post 704 during rotation, so that the adjusting sleeve 706 moves upward, and the connecting rod 707 will push the sliding rod 708, making the pulley 709 fit against the inner wall of the detection hole, which is beneficial to keeping the housing 1 stable. Thus, during the detection process, the situation that the lower part of the device shakes and shifts can be avoided. And when the pulley 709 fits against the inner wall of the detection hole, the second end gear ring 702 will be subjected to a large resistance in the rotation direction. At this time, when the first end gear ring 701 rotates, an upward component force can be provided through its inclined surface to squeeze the compression spring 703, so that sliding occurs between the second end gear ring 702 and the first end gear ring 701, preventing the situation of movement interference with the detection assembly 3.

[0024] In summary, for the rockfill concrete density detection device, during use, first, several detection holes are drilled in the rockfill concrete using a drilling device. Secondly, the guide frame 306 is fixed to the bottoms of the housing 1 and the mounting plate 4 through bolts and the mounting holes 5, and the orientations of the ultrasonic transducer 308 and the ultrasonic sensor 309 can also be adjusted according to requirements, or the ultrasonic transducer 308 and the ultrasonic sensor 309 can be added or reduced, so as to use multiple detection devices to detect between multiple detection holes simultaneously. Then, the housings 1 of the multiple detection devices are respectively placed in different detection holes. At this time, the first motor 203 drives the screw sleeve 205 to rotate through the first bevel gear set 204, and the smooth rod 201 restricts the self-rotation of the first screw rod 206. Therefore, the first screw rod 206 can move up and down, so as to adjust the height during detection, and the height of the housing 1 can be conveniently observed through the scale bar on the outer side of the smooth rod 201. Subsequently, when the second motor 301 is started, the reciprocating lead screw 303 can be driven to rotate through the second bevel gear set 302. At this time, the compression spring 703 will push the second end gear ring 702 to make it close to the first end gear ring 701. Therefore, when rotating, the second screw rod 705 can be driven to rotate through the guide post 704, so that the adjusting sleeve 706 moves upward, and the connecting rod 707 will push the sliding rod 708, so that the pulley 709 fits with the inner wall of the detection hole, which is beneficial to keeping the housing 1 stable. Moreover, when the pulley 709 fits with the inner wall of the detection hole, the second end gear ring 702 will be subject to a large resistance in the rotation direction. At this time, when the first end gear ring 701 rotates, an upward component force can be provided through its inclined surface to squeeze the compression spring 703, so that the second end gear ring 702 and the first end gear ring 701 slide relative to each other, preventing the situation of movement interference with the detection assembly 3. Then, the rotation direction of the driving block 304 is limited by the support rod 605. Therefore, when the reciprocating lead screw 303 rotates, the height of the driving block 304 can be controlled. And when the driving block 304 moves downward, the piston rod 604 will also move downward, and the coupling agent in the fixed cylinder 603 can be transported to the flow channel of the glue outlet sleeve 608 through the second one-way valve 606 and the shunt pipe 607 and flow out from the inner through hole, so as to spray the ends of the ultrasonic transducer 308 and the ultrasonic sensor 309. During this process, the driving block 304 will squeeze the sliding seat 305 to make it move horizontally under the guidance of the guide frame 306. The sliding seat 305 will drive the glue outlet sleeve 608 to move through the buffer spring 611. After fitting with the inner wall of the detection hole, the buffer spring 611 will be compressed. At the same time, the ultrasonic transducer 308 and the ultrasonic transducer 308 will slide inside the glue outlet sleeve 608, so as to squeeze the internal coupling agent, and the excess coupling agent will be discharged from the overflow hole 609. After that, since the ultrasonic transducers 308 and the ultrasonic sensors 309 in the two detection holes correspond to each other, the density of the rockfill concrete can be judged by using the propagation speed of ultrasonic waves. Finally,When the reciprocating lead screw 303 is further rotated to control the driving block 304 to move upward again, the piston rod 604 will also move upward synchronously inside the fixed cylinder 603. At this time, the coupling agent inside the glue storage tank 601 will be replenished into the fixed cylinder 603 through the first one-way valve 602, and it can be reused. And the return spring 307 will push the sliding seat 305 to reset it. Then, the height of the housing 1 is changed through the lifting assembly 2, and the above detection steps are repeated to detect multiple heights in the detection hole.

[0025] The embodiments of the present invention are given for purposes of illustration and description, and are not exhaustive or limit the invention to the disclosed form. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are chosen and described in order to better illustrate the principles of the invention and its practical application, and to enable those of ordinary skill in the art to understand the invention and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A rockfill concrete density detection device, characterized in that: The invention comprises a housing (1) and a detection assembly (3), wherein the top of the housing (1) is connected to a lifting assembly (2), the detection assembly (3) is arranged inside the housing (1), the detection assembly (3) comprises a second motor (301), a second bevel gear set (302), a reciprocating screw (303), a drive block (304), a slide seat (305), a guide frame (306), a return spring (307), an ultrasonic transducer (308) and an ultrasonic sensor (309), the second motor (301) is fixed inside the housing (1), and the end of the second motor (301) is connected to the second bevel gear set (302), the second motor (301) is connected to the second bevel gear set (302), and the second motor (301) is connected to the second bevel gear set (302). A reciprocating screw (303) is arranged inside the two-bevel gear set (302), and a driving block (304) is sleeved on the outer side of the reciprocating screw (303), a sliding seat (305) is slidably connected to the bottom of the driving block (304), and a guide frame (306) is slidably connected to the middle of the sliding seat (305), a return spring (307) is sleeved on the outer side of one end of the guide frame (306), two guide frames (306) are provided, and an ultrasonic transducer (308) is fixed on one side of the lower part of one of the guide frames (306), and an ultrasonic sensor (309) is arranged on one side of the lower part of the other guide frame (306).

2. A rockfill concrete density detection device according to claim 1, characterized in that: The lifting assembly (2) comprises a polished rod (201), a bracket (202) and a first motor (203); the polished rod (201) is arranged on the top of the housing (1); the bracket (202) is slidably connected to the outer side of the upper end of the polished rod (201); and the first motor (203) is fixed to one end of the top of the bracket (202).

3. A rockfill concrete density detection device according to claim 2, characterized in that: The lifting assembly (2) further comprises a first bevel gear set (204), a screw sleeve (205) and a first screw rod (206); the first bevel gear set (204) is arranged at one end of the first motor (203); a screw sleeve (205) is fixed inside one end of the first bevel gear set (204); the screw sleeve (205) is rotatably connected to the bracket (202); the first screw rod (206) is internally threadedly connected to the screw sleeve (205); and the first screw rod (206) is rotatably connected to the housing (1).

4. The rockfill concrete density detection device according to claim 1, characterized in that: A mounting plate (4) is connected to the top of one end of the guide frame (306), and the mounting plate (4) is rotatably connected to the reciprocating screw (303), and mounting holes (5) are provided on the bottom surface of the mounting plate (4) and the bottom surface of the housing (1) at equal distances along the circumference.

5. The rockfill concrete density detection device according to claim 1, characterized in that: A coupling assembly (6) is arranged inside the housing (1), and the coupling assembly (6) comprises a glue storage box (601), a first one-way valve (602) and a fixed cylinder (603); the glue storage box (601) is fixed inside the housing (1), and the first one-way valve (602) is arranged at a lower end of one side of the glue storage box (601); one end of the first one-way valve (602) is connected to the fixed cylinder (603), and the fixed cylinder (603) is fixedly connected to the housing (1).

6. A rockfill concrete density detection device according to claim 5, characterized in that: The coupling assembly (6) further comprises a piston rod (604), a support rod (605), a second one-way valve (606) and a shunt pipe (607); the interior of the fixed cylinder (603) is slidably connected to the piston rod (604), and the top of the piston rod (604) is fixedly connected to the support rod (605); the support rod (605) is slidably connected to the driving block (304), and the support rod (605) is slidably connected to the housing (1); the second one-way valve (606) is arranged at the front end of the lower part of the fixed cylinder (603), and the front end of the second one-way valve (606) is connected to the shunt pipe (607).

7. A rockfill concrete density detection device according to claim 6, characterized in that: The coupling assembly (6) further comprises a rubber outlet sleeve (608), an overflow hole (609), a guide rod (610) and a buffer spring (611); the bottom of the diverter pipe (607) is connected to the rubber outlet sleeve (608) via a pipeline, and the top of the rubber outlet sleeve (608) is provided with an overflow hole (609); a guide rod (610) is arranged on one side of the rubber outlet sleeve (608), and the guide rod (610) is slidably connected to the slide seat (305); and a buffer spring (611) is arranged on one side of the slide seat (305).

8. The rockfill concrete density detection device according to claim 1, characterized in that: A stabilizing assembly (7) is arranged at the inner upper end of the housing (1), and the stabilizing assembly (7) comprises a first end toothed ring (701), a second end toothed ring (702) and a compression spring (703); the first end toothed ring (701) is fixed to the top of the reciprocating screw (303), the second end toothed ring (702) is slidably connected to the top of the first end toothed ring (701), and the compression spring (703) is arranged at the top of the second end toothed ring (702).

9. A rockfill concrete density detection device according to claim 8, characterized in that: The stabilizing assembly (7) further comprises a guide column (704), a second screw rod (705) and an adjusting sleeve (706); the guide column (704) is slidably connected to the interior of the second end gear ring (702), and the guide column (704) is rotatably connected to the reciprocating screw (303); a second screw rod (705) is fixed to the top of the guide column (704), and the second screw rod (705) is rotatably connected to the housing (1); and the adjusting sleeve (706) is threadedly connected to the outer side of the upper end of the second screw rod (705).

10. The rockfill concrete density detection device according to claim 9, characterized in that: The stabilizing assembly (7) further comprises a connecting rod (707), a sliding rod (708) and a pulley (709); the outer side of the adjusting sleeve (706) is rotatably connected to the connecting rod (707), and the end of the connecting rod (707) is rotatably connected to the sliding rod (708); the sliding rod (708) is slidably connected to the housing (1), and one end of the sliding rod (708) is rotatably connected to the pulley (709) inside.

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