Roadbed strength detection device

Abstract

The invention relates to the technical field of roadbed strength detection, and particularly discloses a roadbed strength detection device which comprises a frame, a plurality of wheels mounted on the frame, a mounting beam mounted on the frame, a cleaning device mounted at one end of the mounting beam, and a first test assembly slidably connected to the mounting beam and comprising a center rod. The center rod slides up and down in a center hole of the installation beam in a reciprocating mode, the lower end of the center rod is fixedly connected with a first testing plate, a first spring is fixedly connected between the first testing plate and the installation beam, and a lifting and releasing device is installed on the frame and used for lifting and releasing the first testing plate upwards. The roadbed strength detection device has the advantages that pressure is generated on the roadbed twice, so that the strength of the roadbed can be detected, and meanwhile, after the second test plate is in contact with the roadbed, the whole roadbed strength detection device disclosed by the embodiment can be supported by the second test plate; therefore, when the first test plate strikes the roadbed, the roadbed strength detection device is prevented from integrally deviating.

Description

Technical Field

[0001] The 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, and then the detection vehicle applies pressure to the roadbed through the hydraulic cylinder when moving, 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 surface of the roadbed, and at the same time, part of the pressure on the roadbed will be relieved at the same time, thus 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 in 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 comprises a frame, a plurality of wheels are mounted on the frame, a mounting beam is mounted on the frame, a cleaning device is mounted on 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 reciprocates up and down 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 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 mounted on the rotating shaft, one end of a 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 assembly, which is used to drive the rotating shaft to rotate, thereby lifting the first test plate upward.

[0008] Preferably, the power assembly includes a ratchet sleeved on a 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, a sliding rod is slidably connected to the support plate, the lower end of the sliding 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 on the upper end of the sliding rod, the first pawl assembly is arranged corresponding to the ratchet, and a second pawl assembly is also arranged below the ratchet.

[0009] Preferably, the first pawl assembly and the second pawl assembly have the same structure, and 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 limit column is installed on one side of the base plate, and the limit column is used to limit the rotation angle of the pawl.

[0010] Preferably, it also includes a second test assembly, which includes two cross beams, each of which has two pressure rods fixedly connected at the lower end of each cross beam, the pressure rods slide back and forth up and down in the guide holes of the frame, the lower ends of the pressure rods are 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, two second vertical rods are also slidably connected in the sliding hole of the mounting beam, one side of each second vertical rod is equipped with a second rack, 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 cross 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 a support plate, a third spring is fixedly connected between the support plate and the sleeve, a connecting rod is fixedly arranged 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 as follows: a 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, and 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, so that when the first test plate hits the roadbed, the roadbed strength detection device as a whole will not be offset, and the first test plate will not cause a 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 schematic diagram of the present invention;

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

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

[0017] Figure 4 is a schematic diagram of the structure 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 schematic diagram of the structure of the delay device. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with 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.

[0021] Example 1

[0022] like Figure 1-6 As shown, a roadbed strength detection device provided by the present invention includes a frame 1, on which a plurality of wheels 11 are mounted. The wheels 11 are self-driving wheels, on which a driving shaft is arranged. The wheel shaft is prior art and will not be described in detail herein. When the running device inside the wheel 11 rotates, the driving shaft also rotates accordingly.

[0023] The frame 1 is provided with a mounting beam 2, and one end of the mounting beam 2 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, and a cleaning disk 34 is installed at the lower end of each rotating rod 33. A motor 35 is installed on the assembly plate 32, and 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 of which is to remove obstacles on the roadbed and prevent the obstacles from affecting the strength detection of the roadbed.

[0024] The first test assembly 6 is slidably connected to the mounting beam 2. The first test assembly 6 includes a center rod 61, which reciprocates up and down in the center hole of the mounting beam 2. The lower end of the center rod 61 is fixedly connected to a first test plate 62. A first spring 63 is fixedly connected between the first test plate 62 and the mounting beam 2. The frame 1 is provided with a lifting and releasing device, which is used to lift and release the first test plate 62 upward. Under the action of the first test plate 62's own gravity and the elastic force of the first spring 63, the first test plate 62 hits the roadbed downward, thereby performing an impact test on the strength of the roadbed. The lifting and releasing device includes two support columns 4 fixed to the frame 1, a rotating shaft 41 is rotatably connected between the two support columns 4, a winding drum 42 is installed 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. The lifting and releasing device also includes a power assembly 7, which is used to drive the rotating shaft 41 to rotate, so that the first test plate 62 rises 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, and a plurality of arc-shaped protrusions 72 are 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, and a slide bar 74 is slidably connected to the support plate 73. The lower end of the slide bar 74 is fixedly connected to a roller 75, and a second spring 76 is fixedly connected between the roller 75 and the support plate 73. The upper end of the slide bar 74 is provided with a first pawl assembly 8A, and the first pawl assembly 8A is provided corresponding to the ratchet 70. A second pawl assembly 8B is also provided below the ratchet 70. The first pawl assembly 8A and the second pawl assembly 8B have the same structure, and both include a base plate 81, one side of the base plate 81 is rotatably connected to a pawl 82, and a reset spring 84 is provided between the pawl 82 and the base plate 81, and a limiting column 83 is provided on one side of the base plate 81, and the limiting column 83 is used to limit the rotation angle of the pawl 82.

[0025] A roadbed strength detection device provided by the present invention further 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, and the upper end of the pull rod 77 is fixedly connected to the second pawl assembly 8B through a delay device 9. The delay device 9 includes a sleeve 91, a plug rod 92 is slidably connected in 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, and a connecting rod 95 is fixedly arranged on the upper end of the sleeve 91, and the connecting rod 95 is fixedly connected to the second pawl assembly 8B. Two pressure rods 52 are fixedly connected to the lower end of each cross beam 51, and the pressure rods 52 slide back and forth up and down in the guide holes of the vehicle frame 1. The lower ends of the pressure rods 52 are fixedly connected to the second test plate 53. The upper side of each cross beam 51 is fixedly connected to a first vertical rod 54, and 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 installed on the upper side of the mounting beam 2 through a bracket, and the second rack 65 and the first rack 55 are both meshed with the gear 66.

[0026] 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 through the lifting device 31, so that the cleaning disk 34 contacts the roadbed surface. The motor 35 drives the rotating rod 33 and the cleaning disk 34 to rotate, so that the small obstacles on the roadbed surface are cleaned by the cleaning disk. While driving the roadbed strength detection device as a whole forward, the rotation of the wheel causes the ring 71 to rotate. 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 moves downward under the action of the first 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. See 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 will cause the rotating shaft 41 to rotate accordingly, so that the winding drum 42 tightens the pull rope 44, and the first test plate 62 is lifted upward by the pull rope 44. The upward movement of the first test plate 62 will cause the two second uprights 64 to 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 upright 64 will cause the first upright 54 to drop. The drop of the first upright 54 will cause the pressure rod 52 and the second test plate 53 to drop until the second test plate 53 contacts the roadbed. The roadbed generates pressure, and the deformation of the roadbed surface is observed. In addition, under the action of the delay device 9, after the second test plate 53 contacts the roadbed, the second pawl assembly 8B will also leave the ratchet 70. At this time, the ratchet 70 will rotate arbitrarily after losing the limiting force of the second pawl assembly 8B, and lose the pulling force on the first test plate. Under the elastic force of the second spring 63, the first test plate 62 moves downward rapidly, thereby hitting the roadbed. The pressure of the first test plate 62 on the roadbed is greater than the pressure of the second test plate on the roadbed. Then observe whether the roadbed surface is deformed, so as to detect the strength of the roadbed. The present invention generates pressure on the roadbed twice, so as 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 by the second test plate as a whole, so that the first test plate will not cause the roadbed strength detection device as a whole to deviate when hitting the roadbed.

[0027] Although 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 the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present 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) being mounted on the frame (1), a mounting beam (2) being mounted on the frame (1), a cleaning device (3) being 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) reciprocatingly 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 downward against a roadbed under the action of its own weight and the elastic force of the first spring (63), thereby performing an impact test on the strength of the roadbed.

2. A roadbed strength detection device according to claim 1, characterized in that: The lifting and releasing device comprises two support columns (4) fixed on the frame (1), a rotating shaft (41) rotatably connected between the two support columns (4), a winding drum (42) being mounted on the rotating shaft (41), one end of a pull rope (44) being connected to the winding drum (42), and the other end of the pull rope (44) being tied to the upper end of a center rod (61), and the lifting and releasing device further comprises a power assembly (7), the power assembly (7) being used to drive the rotating shaft (41) to rotate, thereby causing the first test plate (62) to rise upward.

3. A roadbed strength detection device according to claim 2, characterized in that: The power assembly (7) comprises 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) being evenly arranged on the outer ring surface of the collar (71), one side of the support column (4) being fixedly connected to a horizontally arranged support plate (73), a slide bar (74) being slidably connected to the support plate (73), the lower end of the slide bar (74) being fixedly connected to a roller (75), a second spring (76) being fixedly connected between the roller (75) and the support plate (73), a first pawl assembly (8A) being arranged at the upper end of the slide bar (74), the first pawl assembly (8A) being arranged corresponding to the ratchet (70), and a second pawl assembly (8B) being arranged below the ratchet (70).

4. A roadbed strength detection device according to claim 3, characterized in that: 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 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). The limiting column (83) is used to limit the rotation angle of the pawl (82).

5. A roadbed strength detection device according to claim 2, characterized in that: The vehicle also includes a second test assembly (5), the second test assembly (5) including 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 guide holes of the vehicle frame (1), the lower ends of the pressure rods (52) being fixedly connected to a second test plate (53), the upper side of each cross beam (51) being fixedly connected to a first vertical rod (54), one side of each first vertical rod (54) being fixedly connected to a first rack (55), the first vertical rods (54) being arranged along the mounting beam (2) The mounting beam (2) slides up and down in the sliding hole, 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, and the second rack (65) and the first rack (55) are both meshed with the gear (66).

6. A roadbed strength detection device according to claim 5, characterized in that: A fixed shaft (56) is fixedly connected between the two cross beams (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).

7. A roadbed strength detection device according to claim 6, characterized in that: The delay device (9) comprises a sleeve (91), a plug rod (92) is slidably connected inside 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), and a connecting rod (95) is fixedly arranged at the upper end of the sleeve (91), and the connecting rod (95) is fixedly connected to the second pawl assembly (8B).

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