Roadbed compactness detection device

Abstract

The utility model provides a roadbed compactness detection device which comprises a bottom plate, a T-shaped detection groove penetrating through the bottom plate is formed in the bottom plate, a test hammer mechanism is hinged to the tail of a vertical groove of the T-shaped detection groove, the bottom plate is further provided with a hanging frame located behind the T-shaped detection groove and a winding mechanism capable of freely falling, a fixed pulley is hung on the hanging frame, and the fixed pulley is connected with the T-shaped detection groove. And a pull rope connected with the test hammer mechanism through a fixed pulley is wound on the winding mechanism capable of freely falling. The test hammer mechanism capable of freely falling is arranged to knock the pavement material to be tested, the acceleration sensor is utilized to collect the acceleration value of the reaction impact force during knocking, and then the compaction degree is judged according to the acceleration value of the pavement material, so that the real-time measurement effect is realized.

Description

Technical Field

[0001] The utility model relates to the field of road construction measurement, in particular to a roadbed compaction detection device. Background Art

[0002] At present, the traditional method for obtaining the on-site compaction degree of road materials usually adopts the sand filling method. This method requires excavation of road materials in the target section and necessary pretreatment of the collected samples, including cleaning and shaping, for subsequent testing. The volume of the sample under specific conditions is measured through the principle of the sand filling method, and its density is calculated in combination with the drying weight of the sample. The sample needs to be dried to remove moisture to ensure that the dry density of the material is measured. Among them, the drying process takes a long time, usually about 12 hours. Based on the measured dry density value, the on-site compaction degree is calculated, that is, the ratio of the actual dry density to the maximum dry density of the indoor standard compaction test.

[0003] However, the entire test process of the sand filling method includes multiple steps such as digging, drying, and weighing. The operation process is complicated and consumes manpower and material resources. At the same time, since the drying step takes up to 12 hours, the test results cannot be obtained immediately, and the demand for real-time monitoring of compaction cannot be met. Therefore, a roadbed compaction detection device is proposed to solve the above problems. Utility Model Content

[0004] The main purpose of the utility model is to provide a roadbed compaction detection device to solve the problem of low efficiency of the commonly used compaction measurement method.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: a roadbed compaction detection device, including a bottom plate, a T-shaped detection groove running through the bottom plate, a test hammer mechanism hingedly arranged at the tail of the vertical groove of the T-shaped detection groove, a suspension frame and a free-falling reeling mechanism located behind the T-shaped detection groove are also arranged on the bottom plate, a fixed pulley is hoisted on the suspension frame, and a pull rope connected to the test hammer mechanism via the fixed pulley is wound around the free-falling reeling mechanism;

[0006] The test hammer mechanism includes an articulated seat arranged on a T-shaped detection slot, the articulated seat is hinged with a rotating rod through a rotating shaft, a hammer body is arranged at the end of the rotating rod, an acceleration sensor and a connector for connecting a pull rope are arranged at the top of the hammer body, and the acceleration sensor is located at the center of the top of the hammer body.

[0007] In the preferred embodiment, a crossbeam is provided on the suspension frame, a rope member is provided at the bottom of the crossbeam, the connecting member is a movable pulley, a groove for attaching the acceleration sensor to the outside of the movable pulley is provided on the wheel seat, and the end of the pull rope is connected to the rope member after passing through the fixed pulley and the connecting member.

[0008] In the preferred embodiment, the bottom end of the hammer body is hemispherical;

[0009] An angle sensor whose input end is connected to the rotating shaft of the rotating rod is arranged on the side of the articulated seat.

[0010] In the preferred embodiment, the suspension frame includes two symmetrically arranged vertical poles, diagonal braces are arranged on the front and rear sides of the vertical poles, a top plate is arranged at the top of the vertical poles, a fixed pulley is hoisted at the bottom of the top plate, and a crossbeam is arranged between the two vertical poles.

[0011] In a preferred embodiment, the free-falling winding mechanism includes a winding assembly, a driving assembly transmission-connected to the winding assembly, and a transmission separation assembly.

[0012] In a preferred embodiment, the winding assembly includes two symmetrically arranged shaft seats and a winding drum rotatably arranged between the two shaft seats via a rotating shaft, and a driven gear is arranged at one end of the rotating shaft;

[0013] The driving assembly includes a driving motor, the output end of the driving motor is connected to a driving shaft, a plurality of sliding grooves are arranged on the outside of the driving shaft, a transmission gear is slidingly sleeved on the outside of the driving shaft, a sliding block slidingly connected to the sliding groove is arranged on the inner wall surface of the transmission gear, a baffle is also arranged on the outside of the driving shaft, and a resisting spring movably sleeved on the outside of the driving shaft is arranged between the baffle and the transmission gear;

[0014] The transmission separation component comprises a fixed seat, a resistance oil cylinder is arranged through the fixed seat, and a resistance plate facing the outer side of the transmission gear is arranged at the output end of the resistance oil cylinder.

[0015] In the preferred embodiment, a movable cover plate assembly for covering the horizontal groove of the T-shaped detection groove is also provided on the base plate. The movable cover plate assembly includes a cover plate slidably arranged on the horizontal groove of the T-shaped detection groove, and two push-pull cylinders arranged on both sides of the vertical groove of the T-shaped detection groove. T-shaped slide grooves are arranged on both sides of the horizontal groove of the T-shaped detection groove. T-shaped slide bars slidably connected to the two movable grooves are arranged at the bottom of the cover plate, and a connecting plate connected to the telescopic end of the push-pull cylinder is arranged at the top of the cover plate.

[0016] In the preferred embodiment, universal wheels are provided at the four corners of the bottom of the base plate.

[0017] In a preferred embodiment, a pickup is embedded in the side wall of the transverse groove of the T-shaped detection groove.

[0018] In a preferred embodiment, a vibration sensor is arranged outside the rotating rod.

[0019] The utility model provides a roadbed compaction detection device, which knocks on the road surface material to be tested by arranging a test hammer mechanism that can fall freely, and uses an acceleration sensor to collect the acceleration value of the reaction impact force during the knocking, and then judges the compaction degree according to the acceleration value of the road surface material, thereby achieving a real-time measurement effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0021] Figure 1 This is the overall front view structure diagram of the utility model;

[0022] Figure 2 This is the overall rear view structure diagram of the utility model;

[0023] Figure 3 This is a structural diagram of the test hammer mechanism of the utility model;

[0024] Figure 4 This is a structural diagram of the suspension frame of the utility model;

[0025] Figure 5 This is a structural diagram of the reeling mechanism capable of free fall of the utility model;

[0026] Figure 6 This is an exploded structural diagram of the drive assembly of the utility model;

[0027] Figure 7 This is a structural diagram of the transmission separation component of the utility model;

[0028] Figure 8 This is a structural diagram of the position relationship of the T-shaped chute of the utility model;

[0029] Fig. 9 This is a structural diagram of the movable cover assembly of the utility model;

[0030] In the figure: bottom plate 1; T-shaped detection slot 2; test hammer mechanism 3; hinge seat 301; rotating rod 302; hammer body 303; connecting piece 304; acceleration sensor 306; vibration sensor 307; angle sensor 308; suspension frame 4; vertical rod 401; diagonal support rod 402; top plate 403; crossbeam 405; rope member 406; fixed pulley 5; universal wheel 7; free-falling reeling mechanism 8; reeling assembly 81; shaft seat 810; driven gear 8 12; drive assembly 82; drive motor 820; drive shaft 821; sliding groove 822; baffle 823; resistance spring 824; transmission gear 825; transmission separation assembly 83; fixed seat 831; resistance cylinder 832; resistance plate 833; resistance spring 824; transmission gear 825; sliding block 826; movable cover assembly 9; cover 901; T-shaped sliding groove 902; T-shaped slide bar 903; push-pull cylinder 904; connecting plate 905. DETAILED DESCRIPTION

[0031] like Figure 1-9As shown, a roadbed compaction detection device includes a base plate 1, a T-shaped detection groove 2 is opened on the base plate 1 and penetrates the base plate 1, the T-shaped detection groove 2 is composed of a vertical groove and a horizontal groove, the horizontal groove is a detection area, and a test hammer mechanism 3 is hingedly provided at the tail of the vertical groove of the T-shaped detection groove 2, and the overall length of the test hammer mechanism 3 is adapted to the T-shaped detection groove 2. The base plate 1 is also provided with a hanging frame 4 located behind the T-shaped detection groove 2 and a free-falling winding mechanism 8, and the free-falling winding mechanism 8 is located at the hanging frame 4. Below, a fixed pulley 5 is suspended on the suspension frame 4, and a pull rope 11 is wound around the free-fall winding mechanism 8, which is connected to the test hammer mechanism 3 via the fixed pulley 5. When in use, the free-fall winding mechanism 8 can pull the test hammer mechanism 3 to rotate around the hinge position, so that its end is away from the pavement material to form a knocking trend. When the free-fall winding mechanism 8 is in a free-fall state, the test hammer mechanism 3 falls freely under the action of the gravity at the end and knocks the pavement material.

[0032] The test hammer mechanism 3 includes an articulated seat 301 arranged on the T-shaped detection slot 2, and the articulated seat 301 is hingedly provided with a rotating rod 302 through a rotating shaft. A hammer body 303 is arranged at the end of the rotating rod 302, and an acceleration sensor 306 and a connecting piece 304 for connecting the pull rope 11 are arranged at the top of the hammer body 303. The acceleration sensor 306 is located at the center of the top of the hammer body 303. When the hammer body 303 loses traction in the air, it strikes the pavement material under the action of gravity. The hammer body 303 is reacted by the pavement material at the moment of contact, generating acceleration, and then the acceleration value is measured by the acceleration sensor 306 arranged on the hammer body 303. The compaction degree of this test is obtained through the relationship table between the acceleration value and the compaction degree prepared in advance.

[0033] In the preferred embodiment, a crossbeam 405 is provided on the suspension frame 4, a rope member 406 is provided at the bottom of the crossbeam 405, the connecting member 304 is a movable pulley, and a groove 305 for attaching the acceleration sensor 306 to the outside thereof is provided on the wheel seat of the movable pulley. The end of the pull rope 11 is connected to the rope member 406 after passing through the fixed pulley 5 and the connecting member 304. By using the movable pulley and the fixed pulley 5 in combination, the pulling force required to pull the test hammer mechanism 3 can be effectively reduced.

[0034] In the preferred embodiment, the bottom end of the hammer body 303 is hemispherical. By setting the bottom end of the hammer body 303 to be hemispherical, it is convenient to leave a hemispherical pit at the impact position when directly testing softer soil pavement materials. The compaction test can be secondary verified by measuring the depth of the pit and the depth value and compaction relationship table prepared in advance.

[0035] An angle sensor 308 whose input end is connected to the rotating shaft of the rotating rod 302 is arranged on the side of the articulated seat 301. The angle sensor 308 can record the specific angle of each tapping, thereby ensuring the test accuracy.

[0036] In the preferred embodiment, the suspension frame 4 includes two symmetrically arranged vertical poles 401, and diagonal braces 402 are arranged on the front and rear sides of the vertical poles 401. A top plate 403 is arranged at the top of the vertical poles 401, and the fixed pulley 5 is suspended at the bottom of the top plate 403. The crossbeam 405 is arranged between the two vertical poles 401. It should be noted that the height of the top plate 403 is higher than the maximum height of the hammer body 303 when it is pulled up.

[0037] In the preferred embodiment, the winding assembly 81 includes two symmetrically arranged shaft seats 810 and a winding drum 811 rotatably arranged between the two shaft seats 810 through a rotating shaft, a driven gear 812 is arranged at one end of the rotating shaft, and the end of the pull rope 11 is fixed on the winding drum 811 and is wound around it by rotation.

[0038] The driving assembly 82 includes a driving motor 820, the output end of which is connected to a driving shaft 821, a plurality of sliding grooves 822 are arranged on the outside of the driving shaft 821, a transmission gear 825 is arranged on the outer sliding sleeve of the driving shaft 821, the transmission gear 825 is matched with the driven gear 812, and a sliding block 826 is arranged on the inner wall surface of the transmission gear 825 and is slidably connected to the sliding groove 822. In this embodiment, the number of the sliding grooves 822 and the sliding block 826 are both four, and the transmission gear 825 can be moved by the sliding block 826. 26 and the sliding groove 822 slide outside the driving shaft 821, and can switch between the two states of engagement and separation with the driven gear 812. A baffle 823 is also fixed to the outside of the driving shaft 821. A resistance spring 824 movably mounted on the outside of the driving shaft 821 is provided between the baffle 823 and the transmission gear 825. The transmission gear 825 maintains a meshing relationship with the driven gear 812 under the tension of the resistance spring 824, thereby transmitting the power of the driving component 82 to the winding drum 811, thereby achieving the winding effect.

[0039] The transmission separation component 83 includes a fixed seat 831, in which a resistance cylinder 832 is provided, and the output end of the resistance cylinder 832 is provided with a resistance plate 833 facing the outer side of the transmission gear 825. When the resistance cylinder 832 is in a retracted state, the resistance plate 833 and the transmission gear 825 are in a separated state. When the resistance cylinder 832 is in an extended state, the resistance transmission gear 825 squeezes the resistance spring 824, so that the transmission gear 825 is separated from the driven gear 812, thereby making the winding component 81 in a powerless state, thereby realizing the free fall of the test hammer mechanism 3.

[0040] In the preferred embodiment, a movable cover plate assembly 9 for covering the transverse groove of the T-shaped detection groove 2 is also provided on the base plate 1. The movable cover plate assembly 9 includes a cover plate 901 slidably arranged on the transverse groove of the T-shaped detection groove 2, and two push-pull cylinders 904 arranged on both sides of the vertical groove of the T-shaped detection groove 2. The size of the cover plate 901 is larger than the transverse groove of the T-shaped detection groove 2. T-shaped slide grooves 902 are arranged on both sides of the transverse groove of the T-shaped detection groove 2. The T-shaped slide grooves 902 can allow the cover plate 901 to completely leave the top of the T-shaped detection groove 2. The bottom of the cover plate 901 is provided with T-shaped slide bars 903 respectively slidably connected to the two movable grooves 902. The top of the cover plate 901 is provided with a connecting plate 905 connected to the telescopic end of the push-pull cylinder 904. The cover plate 901 can close or open the transverse groove of the T-shaped detection groove 2 by the pushing of the push-pull cylinder 904, and then close the transverse groove when not detecting, which is used to place the hammer body 303.

[0041] In the preferred embodiment, universal wheels 7 are provided at the four corners of the bottom of the base plate 1 to facilitate the movement of the device.

[0042] In the preferred embodiment, a pickup 10 is embedded in the side wall of the transverse groove of the T-shaped detection groove 2. The pickup 10 can collect the sound waves when the hammer 303 strikes, and the compaction degree can be further analyzed in the changes of the sound waves, thereby improving the accuracy of the detection.

[0043] In the preferred embodiment, a vibration sensor 307 is provided on the outside of the rotating rod 302, and the vibration frequency of the hammer 303 when striking can be collected through the vibration sensor 307, and the compaction degree can be further analyzed in the change of the vibration frequency, thereby improving the accuracy of detection from multiple angles.

[0044] The above embodiments are only preferred technical solutions of the present invention and should not be regarded as limitations of the present invention. The protection scope of the present invention shall be the technical solutions recorded in the claims, including equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A roadbed compaction detection device, characterized in that: The invention comprises a bottom plate (1), the bottom plate (1) is provided with a T-shaped detection groove (2) penetrating the bottom plate (1), a test hammer mechanism (3) is hingedly provided at the tail of the vertical groove of the T-shaped detection groove (2), the bottom plate (1) is also provided with a suspension frame (4) located behind the T-shaped detection groove (2) and a free-falling reeling mechanism (8), a fixed pulley (5) is suspended on the suspension frame (4), and a pull rope (11) connected to the test hammer mechanism (3) via the fixed pulley (5) is wound around the free-falling reeling mechanism (8); The test hammer mechanism (3) comprises an articulated seat (301) arranged on the T-shaped detection slot (2); the articulated seat (301) is provided with a rotating rod (302) hingedly connected via a rotating shaft; a hammer body (303) is provided at the end of the rotating rod (302); an acceleration sensor (306) and a connecting piece (304) for connecting a pull rope (11) are provided at the top end of the hammer body (303); the acceleration sensor (306) is located at the center of the top end of the hammer body (303).

2. The roadbed compaction detection device according to claim 1 is characterized in that: A crossbeam (405) is provided on the suspension frame (4), a rope member (406) is provided at the bottom of the crossbeam (405), the connecting member (304) is a movable pulley, a groove (305) for attaching the outer part of the acceleration sensor (306) to the movable pulley is provided on the wheel seat of the movable pulley, and the end of the pull rope (11) is connected to the rope member (406) after passing through the fixed pulley (5) and the connecting member (304).

3. The roadbed compaction detection device according to claim 1 is characterized in that: The bottom end of the hammer body (303) is hemispherical; An angle sensor (308) whose input end is connected to the rotating shaft of the rotating rod (302) is arranged on the side of the hinge seat (301).

4. The roadbed compaction detection device according to claim 2 is characterized in that: The suspension frame (4) comprises two symmetrically arranged vertical poles (401), the front and rear sides of the vertical poles (401) are both provided with diagonal bracing rods (402), the top ends of the vertical poles (401) are provided with a top plate (403), the fixed pulley (5) is hoisted at the bottom of the top plate (403), and the crossbeam (405) is arranged between the two vertical poles (401).

5. The roadbed compaction detection device according to claim 2 is characterized in that: The free-falling reeling mechanism (8) comprises a reeling assembly (81), a driving assembly (82) drivingly connected to the reeling assembly (81), and a driving separation assembly (83).

6. The roadbed compaction detection device according to claim 5 is characterized in that: The winding assembly (81) comprises two symmetrically arranged shaft seats (810) and a winding drum (811) rotatably arranged between the two shaft seats (810) via a rotating shaft, wherein a driven gear (812) is arranged at one end of the rotating shaft; The driving assembly (82) comprises a driving motor (820), the output end of the driving motor (820) is connected to a driving shaft (821), a plurality of sliding grooves (822) are arranged outside the driving shaft (821), a transmission gear (825) is slidably sleeved on the outside of the driving shaft (821), a sliding block (826) slidably connected to the sliding groove (822) is arranged on the inner wall surface of the transmission gear (825), a baffle (823) is further arranged outside the driving shaft (821), and a resisting spring (824) movably sleeved on the outside of the driving shaft (821) is arranged between the baffle (823) and the transmission gear (825); The transmission separation component (83) comprises a fixed seat (831), a resisting oil cylinder (832) is provided through the fixed seat (831), and a resisting plate (833) facing the outside of the transmission gear (825) is provided at the output end of the resisting oil cylinder (832).

7. The roadbed compaction detection device according to claim 1 is characterized in that: A movable cover assembly (9) for covering the transverse groove of the T-shaped detection groove (2) is also provided on the bottom plate (1). The movable cover assembly (9) comprises a cover (901) slidably arranged on the transverse groove of the T-shaped detection groove (2), and two push-pull cylinders (904) arranged on both sides of the vertical groove of the T-shaped detection groove (2). T-shaped slide grooves (902) are arranged on both sides of the transverse groove of the T-shaped detection groove (2). T-shaped slide bars (903) slidably connected to the two movable grooves (902) are arranged at the bottom of the cover (901), and a connecting plate (905) connected to the telescopic end of the push-pull cylinder (904) is arranged at the top of the cover (901).

8. The roadbed compaction detection device according to claim 1 is characterized in that: Universal wheels (7) are arranged at the four corners of the bottom of the base plate (1).

9. The roadbed compaction detection device according to claim 1 is characterized in that: A pickup (10) is embedded in the side wall of the transverse groove of the T-shaped detection groove (2).

10. The roadbed compaction detection device according to claim 1, characterized in that: A vibration sensor (307) is arranged outside the rotating rod (302).

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