A device for detecting the strength of a roadbed

Abstract

The application relates to the technical field of roadbed strength detection, and particularly discloses a roadbed strength detection device, which comprises a vehicle frame, a plurality of wheels are arranged on the vehicle frame, a mounting beam is arranged on the vehicle frame, a cleaning device is arranged at one end of the mounting beam, a first test assembly is slidably connected to the mounting beam, the first test assembly comprises a center rod, the center rod reciprocatingly slides in a center hole of the mounting beam, a first test plate is fixedly connected to the lower end of the center rod, a first spring is fixedly connected between the first test plate and the mounting beam, a lifting and releasing device is arranged on the vehicle frame, and the lifting and releasing device is used for lifting and releasing the first test plate upwards. The application has the advantages that the roadbed strength can be detected by applying pressure to the roadbed twice, and meanwhile, the roadbed strength detection device can be supported by the second test plate after the second test plate is in contact with the roadbed, so that the first test plate will not cause the whole roadbed strength detection device to deviate when hitting the roadbed.

Description

Technical Field

[0001] The present invention relates to the technical field of roadbed strength detection, and in particular to a roadbed strength detection device. Background Art

[0002] After the construction of the highway subgrade is completed, in order to ensure the quality and stability in future use, it is usually necessary to select some locations to test the strength of the highway subgrade, so a highway subgrade strength testing device is needed.

[0003] The roadbed strength detection device in the prior art is to install a pressure-applying hydraulic cylinder on the detection vehicle. Then, when the detection vehicle is moving, the hydraulic cylinder applies pressure to the roadbed, and then observes the deformation of the roadbed, thereby realizing the strength detection of the roadbed. However, in this detection method, when the hydraulic cylinder applies pressure to the roadbed during the detection process, the wheels are in contact with the roadbed. In this way, the telescopic end of the hydraulic cylinder will cause the vehicle body to deviate when it contacts the roadbed surface, and at the same time, some of the pressure on the roadbed will be relieved, thereby reducing the test pressure on the roadbed, which may affect the accuracy of subsequent detection. Summary of the Invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a roadbed strength detection device, thereby solving the problems of the prior art.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A roadbed strength detection device includes a frame, a plurality of wheels are mounted on the frame, a mounting beam is mounted on the frame, a cleaning device is mounted at one end of the mounting beam, a first test assembly is slidably connected to the mounting beam, the first test assembly includes a center rod, the center rod slides back and forth up and down in the center hole of the mounting beam, the lower end of the center rod is fixedly connected to a first test plate, a first spring is fixedly connected between the first test plate and the mounting beam, a lifting and releasing device is mounted on the frame, the lifting and releasing device is used to lift and release the first test plate, so that the first test plate hits the roadbed downward under the action of its own gravity and the elastic force of the first spring, thereby performing an impact test on the strength of the roadbed.

[0007] Preferably, the lifting and releasing device includes two support columns fixed on the frame, a rotating shaft is rotatably connected between the two support columns, a winding drum is installed on the rotating shaft, one end of the pull rope is connected to the winding drum, and the other end of the pull rope is tied to the upper end of the center rod. The lifting and releasing device also includes a power component, which is used to drive the rotating shaft to rotate, thereby causing the first test plate to rise upward.

[0008] Preferably, the power assembly includes a ratchet sleeved on the rotating shaft, a ring sleeved on the driving shaft of the wheel, a plurality of arc-shaped protrusions are evenly arranged on the outer ring surface of the ring, one side of the support column is fixedly connected to a horizontally arranged support plate, the support plate is slidably connected to a slide rod, the lower end of the slide rod is fixedly connected to a roller, a second spring is fixedly connected between the roller and the support plate, a first pawl assembly is installed at the upper end of the slide rod, the first pawl assembly is arranged corresponding to the ratchet, and a second pawl assembly is also provided below the ratchet.

[0009] Preferably, the first pawl assembly and the second pawl assembly have the same structure. They both include a base plate, one side of the base plate is rotatably connected to the pawl, a return spring is installed between the pawl and the base plate, and a limiting column is installed on one side of the base plate for limiting the rotation angle of the pawl.

[0010] Preferably, it also includes a second test assembly, which includes two cross beams, each cross beam having two pressure rods fixedly connected at the lower end, the pressure rods sliding back and forth up and down in the guide holes of the frame, the lower ends of the pressure rods fixedly connected to the second test plate, the upper side of each cross beam is fixedly connected to the first vertical rod, one side of each first vertical rod is fixedly connected to the first rack, the first vertical rod slides up and down along the sliding hole of the mounting beam, and two second vertical rods are also slidingly connected in the sliding hole of the mounting beam, a second rack is installed on one side of each second vertical rod, the first rack and the second rack are arranged in a one-to-one correspondence, a gear is provided between the second rack and the first rack, the gear is mounted on the upper side of the mounting beam through a bracket, and the second rack and the first rack are both meshed with the gear.

[0011] Preferably, a fixed shaft is fixedly connected between the two beams, a pull rod is fixedly connected to the fixed shaft, and an upper end of the pull rod is fixedly connected to the second pawl assembly via a delay device.

[0012] Preferably, the delay device includes a sleeve, a plug rod is slidably connected inside the sleeve, the lower end of the plug rod is fixedly connected to the support plate, a third spring is fixedly connected between the support plate and the sleeve, a connecting rod is fixedly set at the upper end of the sleeve, and the connecting rod is fixedly connected to the second pawl assembly.

[0013] The advantages of the present invention are that: the roadbed strength detection device provided by the present invention generates pressure on the roadbed twice, thereby being able to detect the strength of the roadbed. At the same time, after the second test plate contacts the roadbed, the roadbed strength detection device of this embodiment can be supported as a whole by the second test plate. In this way, when the first test plate hits the roadbed, the roadbed strength detection device as a whole will not be offset, the first test plate will not cause loss of striking force, and will not affect the accuracy of the detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a basic structural diagram of the present invention;

[0015] Figure 2 It is a schematic structural diagram of the power assembly of the present invention;

[0016] Figure 3 is a schematic structural diagram of the second test assembly;

[0017] Figure 4 is a schematic structural diagram of the first test assembly;

[0018] Figure 5 is a schematic structural diagram of a first pawl assembly or a second pawl assembly;

[0019] Figure 6 It is a structural diagram of the delay device. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. Example 1

[0021] like Figure 1-6 As shown, the present invention provides a roadbed strength detection device, including a frame 1, on which a plurality of wheels 11 are mounted. The wheels 11 are self-driven wheels, and a drive shaft is provided on the wheels. The wheel shaft is prior art and will not be described in detail here. When the running device inside the wheel 11 rotates, the drive shaft also rotates.

[0022] The frame 1 is provided with a mounting beam 2, one end of which is provided with a cleaning device 3. Figure 1 The cleaning device 3 includes an assembly plate 32, which is controlled to rise or fall by a lifting device 31. The lower side of the assembly plate 32 is rotatably connected to multiple rotating rods 33. The lower end of each rotating rod 33 is equipped with a cleaning disk 34. The assembly plate 32 is equipped with a motor 35. The main shaft of the motor 35 is connected to all the rotating rods 33 through a corresponding transmission device. The transmission device is a prior art and will not be described in detail here. At the same time, the cleaning device can also adopt the prior art. The purpose is to remove obstacles on the roadbed and prevent the obstacles from affecting the strength detection of the roadbed.

[0023] The first test assembly 6 is slidably connected on the mounting beam 2, the first test assembly 6 comprises a center rod 61, the center rod 61 reciprocally slides up and down in the center hole of the mounting beam 2, the lower end of the center rod 61 is fixedly connected with a first test plate 62, the first test plate 62 is fixedly connected with a first spring 63 between the mounting beam 2, the vehicle frame 1 is provided with a lifting and releasing device, the lifting and releasing device is used for lifting and releasing the first test plate 62 upward, under the action of the gravity of the first test plate 62 and the elastic force of the first spring 63, the first test plate 62 hits the roadbed downward, so as to carry out the hitting test on the strength of the roadbed, the lifting and releasing device comprises two support columns 4 fixed on the vehicle frame 1, a rotating shaft 41 is rotatably connected between the two support columns 4, a winding reel 42 is provided on the rotating shaft 41, one end of a pull rope 44 is connected on the winding reel 42, the other end of the pull rope 44 is tied on the upper end of the center rod 61, the lifting and releasing device further comprises a power assembly 7, the power assembly 7 is used for driving the rotating shaft 41 to rotate, so as to lift the first test plate 62 upward. The power assembly 7 comprises a ratchet wheel 70 sleeved on the rotating shaft 41, a sleeve ring 71 is sleeved on the driving shaft of the vehicle wheel 11, a plurality of arc-shaped protrusions 72 are uniformly arranged on the outer ring surface of the sleeve ring 71, a support plate 73 is fixedly connected on one side of the support column 4 and arranged horizontally, a slide rod 74 is slidably connected on the support plate 73, a roller 75 is fixedly connected on the lower end of the slide rod 74, a second spring 76 is fixedly connected between the roller 75 and the support plate 73, a first pawl assembly 8A is provided on the upper end of the slide rod 74, the first pawl assembly 8A is arranged corresponding to the ratchet wheel 70, and a second pawl assembly 8B is further arranged below the ratchet wheel 70. The first pawl assembly 8A and the second pawl assembly 8B are the same in structure, and they both comprise a base plate 81, one side of the base plate 81 is rotatably connected with a pawl 82, a return spring 84 is arranged between the pawl 82 and the base plate 81, a limiting column 83 is arranged on one side of the base plate 81, and the limiting column 83 is used for limiting the rotation angle of the pawl 82.

[0024] The roadbed strength testing device provided by the present invention also includes a second test assembly 5, which includes two crossbeams 51. A fixed shaft 56 is fixedly connected between the two crossbeams 51. A pull rod 77 is fixedly connected to the fixed shaft 56. The upper end of the pull rod 77 is fixedly connected to the second pawl assembly 8B via a delay device 9. The delay device 9 includes a sleeve 91. A plug rod 92 is slidably connected within the sleeve 91. The lower end of the plug rod 92 is fixedly connected to a support plate 93. A third spring 94 is fixedly connected between the support plate 93 and the sleeve 91. A connecting rod 95 is fixedly provided at the upper end of the sleeve 91. The connecting rod 95 is fixedly connected to the second pawl assembly 8B. The lower end of each crossbeam 51 is fixedly connected to two pressure rods 52, which slide back and forth up and down in the guide hole of the frame 1. The lower end of the pressure rod 52 is fixedly connected to the second test plate 53. The upper side of each crossbeam 51 is fixedly connected to a first vertical rod 54. One side of each first vertical rod 54 is fixedly connected to a first rack 55. The first vertical rod 54 slides up and down along the sliding hole of the mounting beam 2. Two second vertical rods 64 are also slidably connected in the sliding hole of the mounting beam 2. The two second vertical rods 64 are both located above the first test plate 62. A second rack 65 is installed on one side of each second vertical rod 64. The first rack 55 and the second rack 65 are arranged in a one-to-one correspondence. A gear 66 is provided between the second rack 65 and the first rack 55. The gear 66 is mounted on the upper side of the mounting beam 2 through a bracket. The second rack 65 and the first rack 55 are both meshed with the gear 66.

[0025] During use, the wheel 11 rotates, thereby driving the roadbed strength detection device to move as a whole. At the same time, the assembly plate 32 is controlled to descend by the lifting device 31, so that the cleaning disc 34 contacts the roadbed surface. The motor 35 drives the rotating rod 33 and the cleaning disc 34 to rotate, so that the small obstacles on the roadbed surface are cleaned by the cleaning disc, driving the roadbed strength detection device as a whole to move forward. Due to the rotation of the wheel, the ring 71 is rotated. During the rotation of the ring 71, the arc-shaped protrusion 72 intermittently generates an upward thrust on the roller 75 and the slide bar 74, causing the slide bar 74 to move upward. When the arc-shaped protrusion 72 leaves the roller 75, the slide bar 74 is moved downward under the action of the second spring 76. In this way, during the overall advancement of the roadbed strength detection device, the slide bar 74 moves up and down reciprocatingly, so that the first pawl assembly 8A also moves up and down reciprocatingly with the slide bar 74. Figure 2 and Figure 5When the first pawl assembly 8A moves upward, the pawl 82 will contact the helical teeth of the ratchet 70. Since the limiting column 83 is used to limit the rotation angle of the pawl 82, the pawl 82 will cause the ratchet 70 to rotate clockwise by a certain angle during the rising process. When the first pawl assembly 8A moves downward, the pawl 82 contacts the helical teeth of the ratchet 70, and the pawl 82 will rotate upward and avoid the helical teeth of the ratchet 70. In this way, the ratchet 70 will intermittently rotate clockwise during the up and down reciprocating movement of the first pawl assembly 8A. The function of the second pawl assembly 8B is to lock the ratchet 70. When the second pawl assembly 8B is locked, the ratchet 70 can only rotate clockwise but not counterclockwise. The clockwise rotation of the ratchet 70 causes the rotating shaft 41 to rotate accordingly, thereby causing the winding drum 42 to tighten the pull rope 44, thereby lifting the first test plate 62 upward through the pull rope 44. During the upward movement of the first test plate 62, the two second vertical rods 64 will move upward. Since the second rack 65 and the first rack 55 are both engaged with the gear 66, the upward movement of the second vertical rod 64 will cause the first vertical rod 54 to descend. The descent of the first vertical rod 54 will cause the pressure rod 52 and the second test plate 53 to descend until the second test plate 53 contacts the roadbed. Pressure is generated on the roadbed to observe whether the roadbed surface is deformed. Furthermore, under the action of the delay device 9, after the second test plate 53 contacts the roadbed, the second pawl assembly 8B also separates from the ratchet 70. At this time, the ratchet 70, having lost the restraining force of the second pawl assembly 8B, can rotate freely, and simultaneously loses the tension on the first test plate. Under the elastic force of the first spring 63, the first test plate 62 moves downward rapidly, thereby striking the roadbed. The pressure exerted by the first test plate 62 on the roadbed is greater than the pressure exerted by the second test plate on the roadbed. Deformation of the roadbed surface is then observed, thereby detecting the strength of the roadbed. The present invention generates pressure on the roadbed twice to detect the strength of the roadbed. At the same time, after the second test plate contacts the roadbed, the roadbed strength detection device of this embodiment is supported by the second test plate. Thus, the first test plate does not cause the entire roadbed strength detection device to deflect when striking the roadbed.

[0026] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A roadbed strength detection device, comprising a frame (1), a plurality of wheels (11) mounted on the frame (1), a mounting beam (2) mounted on the frame (1), a cleaning device (3) mounted at one end of the mounting beam (2), characterized in that: The mounting beam (2) is slidably connected to a first test assembly (6), the first test assembly (6) comprising a center rod (61), the center rod (61) sliding up and down in a center hole of the mounting beam (2), the lower end of the center rod (61) being fixedly connected to a first test plate (62), a first spring (63) being fixedly connected between the first test plate (62) and the mounting beam (2), the frame (1) being provided with a lifting and releasing device, the lifting and releasing device being used to lift and release the first test plate (62), so that the first test plate (62) strikes the roadbed downwards under the action of its own weight and the elastic force of the first spring (63), thereby performing a striking test on the strength of the roadbed; The lifting and releasing device includes two support columns (4) fixed on the vehicle frame (1), a rotating shaft (41) is rotatably connected between the two support columns (4), a winding drum (42) is mounted on the rotating shaft (41), one end of a pull rope (44) is connected to the winding drum (42), and the other end of the pull rope (44) is tied to the upper end of the center rod (61), and the lifting and releasing device also includes a power assembly (7), which is used to drive the rotating shaft (41) to rotate, thereby causing the first test plate (62) to rise upward; The power assembly (7) includes a ratchet (70) sleeved on the rotating shaft (41), a collar (71) sleeved on the driving shaft of the wheel (11), a plurality of arc-shaped protrusions (72) evenly arranged on the outer ring surface of the collar (71), one side of the support column (4) is fixedly connected to a horizontally arranged support plate (73), a slide rod (74) is slidably connected to the support plate (73), the lower end of the slide rod (74) is fixedly connected to a roller (75), a second spring (76) is fixedly connected between the roller (75) and the support plate (73), the upper end of the slide rod (74) is provided with a first pawl assembly (8A), the first pawl assembly (8A) is arranged corresponding to the ratchet (70), and a second pawl assembly (8B) is further provided below the ratchet (70); The first pawl assembly (8A) and the second pawl assembly (8B) have the same structure, and both comprise a base plate (81). One side of the base plate (81) is rotatably connected to the pawl (82). A return spring (84) is installed between the pawl (82) and the base plate (81). A limiting column (83) is installed on one side of the base plate (81). The limiting column (83) is used to limit the rotation angle of the pawl (82).

2. A roadbed strength detection device according to claim 1, characterized in that: The vehicle frame (1) further comprises a second test assembly (5), wherein the second test assembly (5) comprises two cross beams (51), the lower end of each cross beam (51) being fixedly connected to two pressure rods (52), the pressure rods (52) sliding up and down in the guide holes of the vehicle frame (1), the lower ends of the pressure rods (52) being fixedly connected to the second test plate (53), the upper side of each cross beam (51) being fixedly connected to the first vertical rod (54), the side of each first vertical rod (54) being fixedly connected to the first rack (55), the first vertical rod (54) being fixedly connected to the first rack (55), and the first vertical rod (54) being fixedly connected to the first rack (55) along the mounting beam (2). The sliding hole of the mounting beam (2) slides up and down, and two second vertical rods (64) are also slidably connected in the sliding hole of the mounting beam (2). A second rack (65) is installed on one side of each second vertical rod (64). The first rack (55) and the second rack (65) are arranged in a one-to-one correspondence. A gear (66) is provided between the second rack (65) and the first rack (55). The gear (66) is installed on the upper side of the mounting beam (2) through a bracket. The second rack (65) and the first rack (55) are both meshed with the gear (66).

3. A roadbed strength detection device according to claim 2, characterized in that: A fixed shaft (56) is fixedly connected between the two crossbeams (51), a pull rod (77) is fixedly connected to the fixed shaft (56), and the upper end of the pull rod (77) is fixedly connected to the second pawl assembly (8B) via a delay device (9).

4. A roadbed strength detection device according to claim 3, characterized in that: The delay device (9) comprises a sleeve (91), an insert rod (92) slidably connected in the sleeve (91), a lower end of the insert rod (92) fixedly connected to a support plate (93), a third spring (94) fixedly connected between the support plate (93) and the sleeve (91), and a connecting rod (95) fixedly provided at the upper end of the sleeve (91), wherein the connecting rod (95) is fixedly connected to the second pawl assembly (8B).

Images