Road surface thickness detection device for highway engineering

Abstract

The utility model relates to a road surface thickness detection device for highway engineering, comprising a pedestal comprising a bottom plate and a top plate; a first radial flange is formed at the upper end of the first sleeve, and a plurality of through holes are formed in the first radial flange; the lantern ring is sleeved outside the first sleeve; a second radial flange is formed in the middle of the second sleeve, and a plurality of through holes vertically opposite to the through holes in the first radial flange are formed in the second radial flange; a handle is arranged on the outer wall of the radial flange II; the drilling machine is fixedly connected with the second sleeve, and a drill bit can penetrate out of a lower port of the first sleeve. Each supporting spring set comprises a guide sliding rod and a supporting spring which are matched in a one-to-one correspondence mode; the lower end of the guide sliding rod is fixedly connected with the lantern ring, and the upper end penetrates through each through hole and is provided with a nut; the supporting spring is sleeved on the guide slide bar and two ends of the supporting spring are arranged between the two radial flanges. According to the utility model, the perpendicularity of the drill bit relative to the road surface can be controlled in a labor-saving manner, and the inclination degree of the drill bit can be effectively inhibited.

Description

Technical Field

[0001] This utility model relates to the field of highway engineering testing technology, specifically to a road surface thickness testing device for highway engineering. Background Technology

[0002] In highway construction, the thickness of each layer of the paved road surface is closely related to the overall strength of the road. Therefore, it is necessary to test the thickness of the paved road surface to confirm whether the thickness of each layer meets the requirements. Thus, testing the road surface thickness is a necessary step in ensuring the quality of highway construction.

[0003] In existing technologies, the commonly used method for detecting the thickness of highway pavement is the core drilling method. The pavement thickness detection device includes a column and a drilling rig, with the drilling rig matched to the column via a screw drive mechanism. During operation, turning the handwheel drives the drilling rig to move up and down relative to the column along the screw, allowing the drill bit mounted on the rig to approach and move upwards relative to the pavement. The main drawbacks are: because the drilling rig itself is heavy, the labor intensity required to maintain the drill bit's axis vertical by holding the column is considerable. Furthermore, once the drill bit is inserted into the pavement, it is affected by machine vibration, making the already difficult task of maintaining the drill bit's verticality even more challenging. It is difficult to guarantee the verticality of the drill bit during insertion into the pavement, and significant tilting is likely, leading to larger errors in the pavement thickness detection. Utility Model Content

[0004] In response to the problems of high labor intensity and significant tilting of the drill bit relative to the road surface in previous road thickness detection devices, this utility model provides a road thickness detection device for highway engineering. It can reduce the labor intensity of operation, make it easier to control the perpendicularity of the drill bit relative to the ground, effectively suppress the degree of drill bit tilting, and help reduce the detection error of road thickness.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: a road surface thickness detection device for highway engineering, comprising:

[0006] The base includes a bottom plate and a top plate arranged alternately on the upper and lower sides, and a threaded through hole is formed on the top plate; a first electromagnet part can be fixedly provided on the upper end face of the top plate;

[0007] The first sleeve has an external thread on the outer wall of the sleeve body that matches the threaded through hole; a radial flange is formed at the upper end of the sleeve body and a plurality of through holes are arranged alternately around the circumference on the radial flange.

[0008] A collar is fitted onto the sleeve body of the first sleeve, allowing it to move up and down relative to the sleeve body of the first sleeve, switching between approaching and moving away from the radial flange; a second electromagnet part may be fixedly provided on the lower end face of the collar.

[0009] The second sleeve has a radial flange two formed in the middle of the sleeve body, and multiple through holes are provided on the radial flange two, so that the through holes on the radial flange two correspond one-to-one with the through holes on the radial flange one; at least two flange blocks are formed on the outer wall of the radial flange two, and handles are provided on the flange blocks; the middle part of the drill is inserted into the cavity of the second sleeve and fixedly connected to the second sleeve, so that the drill bit provided on the drill can pass through the cavity of the first sleeve and extend outward from the lower port.

[0010] And multiple support spring assemblies, including guide slide rods and support springs that correspond to and match the guide slide rods one by one; the lower end of the guide slide rod is fixedly connected to the collar, and the upper end passes through the through holes on the first radial flange and the second radial flange in sequence and is matched with the nut; the support springs are fitted on the guide slide rods and their two ends are in contact with the upper end face of the first radial flange and the lower end face of the second radial flange, respectively.

[0011] In the initial state, the multiple support springs can support the second sleeve, keeping the drill rig in the uppermost position relative to the base. At that time, the lower end of the drill bit installed on the drill rig is located at a height near the lower port of the first sleeve, so that after the entire device is placed on the road surface, the lower end face of the drill bit can maintain a vertical distance from the road surface.

[0012] When the first sleeve matches the threaded through hole on the base through the external thread on its outer wall, the vertical distance between the lower end of the drill bit and the road surface in the initial state can be adjusted by adjusting the height of the first sleeve relative to the base.

[0013] The inner diameter of the sleeve body of the first sleeve is larger than the outer diameter of the drill bit.

[0014] Optionally, a threaded through hole with its axis in the vertical direction is formed on the top plate of the base; and an external thread matching the threaded through hole is formed on the outer wall of the sleeve body of the first sleeve.

[0015] Optionally, fine teeth are formed on the outer peripheral surface of the first radial flange and distributed in a circumferential direction to increase the friction coefficient of the outer peripheral surface of the first radial flange, thereby facilitating the movement of the first sleeve relative to the base plate in a vertical direction via the first radial flange.

[0016] Optionally, a plurality of pedals are formed on the outer peripheral surface of the base plate, and the plurality of pedals are distributed on the left and right sides of the base plate, that is, some pedals are located on the left side of the base plate, while the remaining pedals are located on the right side of the base plate.

[0017] Optionally, a first electromagnet portion is fixedly provided on the upper end face of the top plate of the base; and a second electromagnet portion or an iron ring portion is fixedly provided on the lower end face of the collar.

[0018] The beneficial effects of this invention are: it makes the operation of core drilling for road thickness sampling less labor-intensive and allows for easy control of the drill bit's verticality relative to the ground, effectively suppressing the degree of drill bit tilting and helping to reduce errors in road thickness detection. Furthermore, it allows for the application of greater downward pressure on the drilling rig during core drilling, thus improving the efficiency of the sampling operation. Attached Figure Description

[0019] Figure 1 This is a cross-sectional structural diagram of the present invention.

[0020] Figure 2 This is a cross-sectional structural diagram of the present invention without the drilling rig and drill bit installed.

[0021] Figure 3 This is a top view of the second sleeve structure.

[0022] Figure 4 This is a top view of the structure of the first sleeve.

[0023] Figure 5 This is a top view of the base structure.

[0024] In the diagram: 100 Drill rig; 200 Drill bit; 300 Road surface; 10 Base; 11 First electromagnet part; 12 Pedal; 13 Base plate; 14 Top plate; 15 Threaded through hole; 20 First sleeve; 21 External thread; 22 Radial flange one; 23 Outer circumferential surface; 30 Collar; 31 Second electromagnet part; 40 Second sleeve; 41 Flange block; 42 Handle; 43 Conical surface; 44 Radial flange two; 50 Support spring assembly; 51 Guide slide rod; 52 Support spring. Detailed Implementation

[0025] The structures, proportions, and sizes shown in the accompanying drawings are merely for illustrative purposes and to aid those skilled in the art. They are not intended to limit the scope of this invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, provided they do not affect the effectiveness or purpose of this invention, should still fall within the scope of the technical content disclosed in this invention. Furthermore, terms such as "upper," "lower," "front," "rear," and "middle" used in this specification are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0026] like Figure 1 Of Figure 5 The road surface thickness detection device shown includes a base 10, a first sleeve 20, a collar 30, a second sleeve 40, and multiple support spring groups 50.

[0027] The base includes a bottom plate 13 and a top plate 14 arranged alternately, and a threaded through hole 15 is formed on the top plate 14. A first electromagnet part 11 is fixedly provided on the upper end surface of the top plate 14 and around the threaded through hole 15. A plurality of pedals 12 extending radially outward are formed on the outer wall of the bottom plate 13.

[0028] An external thread 21 matching the threaded through hole 15 is formed on the outer wall of the sleeve body of the first sleeve 20. A radial flange 22 is formed at the upper end of the sleeve body of the first sleeve 20, and a plurality of through holes arranged alternately in the circumferential direction are provided on the radial flange 22.

[0029] The collar 30 is sleeved on the sleeve body of the first sleeve 20, allowing the collar 30 to move up and down relative to the sleeve body of the first sleeve 20, and to alternately move closer to and further away from the radial flange 22. A second electromagnet part 31 is fixedly provided on the lower end face of the collar 30. The inner diameter of the collar 30 is larger than the outer diameter of the sleeve body of the first sleeve 20.

[0030] A second radial flange 44 is formed at the lower part of the cylinder body of the second sleeve, and a plurality of through holes are provided on the second radial flange 44, such that the through holes on the second radial flange 44 correspond one-to-one with the through holes on the first radial flange 22. Two flange blocks 41 are formed on the outer wall of the second radial flange 44, and handles 42 are provided on the flange blocks 41.

[0031] The drill rig 100 is inserted into the cavity of the second sleeve 40 and fixedly connected to the second sleeve 40, allowing the drill bit 200 mounted on the drill rig 100 to pass through the cavity of the first sleeve 20 and extend outward / downward from the lower port of the first sleeve 20. At the lower port of the cavity of the second sleeve 40, an annular conical surface 43 is formed to correspond and match the conical surface formed on the outer shell of the drill rig 100, thereby sharing the weight of the drill rig 100 and ensuring that the drill rig 100 is firmly mounted on the second sleeve 40 and connected as a whole.

[0032] The support spring assembly 50 includes a guide slide rod 51 and a support spring 52 corresponding to each guide slide rod 51. The lower end of the guide slide rod 51 is fixedly connected to the collar 30, and the upper end of the guide slide rod 51 passes through the through holes on the first radial flange 22 and the second radial flange 44 in sequence before matching with the nut. The support spring 52 is fitted onto the guide slide rod 51, and both ends of the support spring 52 are in contact with the upper end face of the first radial flange 22 and the lower end face of the second radial flange 44, respectively, thus supporting the second sleeve 40, so that the lower end of the drill bit 200 mounted on the drilling rig 100 is positioned above the bottom / lower end face of the base 10. In the initial state, multiple support springs 52 can support the second sleeve 40, so that the drill 100 is held at the uppermost position (in terms of stroke) relative to the base 10. At that time, the lower end of the drill bit 200 installed on the drill 100 is located near the lower port of the first sleeve 20, so that after the entire device is placed on the road surface 300, a vertical distance can be maintained between the lower end face of the drill bit 200 and the road surface 300.

[0033] The threaded section formed at the upper end of the guide slide 51 can have a relatively long length. By adjusting the matching height position of the nut on the threaded section, the initial compression state / initial support force of the support spring 52 can be adjusted.

[0034] When the first sleeve 20 matches the threaded through hole 15 on the base 10 through the external thread 21 on its outer wall, the vertical distance between the lower end of the drill bit 200 and the road surface 300 in the initial state can be adjusted by adjusting the height position of the first sleeve 20 relative to the base 10.

[0035] Both the base plate 13 and the top plate 14 are annular, and the inner diameter of the base plate 13 is not less than the outer diameter of the top plate 14, so as to ensure that the base 10 can stand stably on the road surface 300.

[0036] The inner diameter of the through hole on the first radial flange 22 and the inner diameter of the through hole on the second radial flange 44 can both be consistent with the outer diameter of the guide slide rod 51, or in other words, they can both be consistent with the outer diameter of the smooth column section on the guide slide rod 51. This ensures that the second sleeve 40 moves up and down relative to the base 10 in a basically vertical direction, thereby effectively suppressing the degree of deviation of the drilling direction of the drill bit 200 during the sampling process, and reducing the detection error of the road surface 300 thickness.

[0037] During operation, the road thickness detection device for highway engineering involved in this utility model is placed on the road surface 300, and the bottom surface of the base 10 is in contact with the road surface 300. Since the vertical line where the center of gravity of the drilling rig 100 is located is basically coincident with the center of gravity line of the entire device, the entire device can stand stably on the road surface 300 without the operator having to exert too much labor intensity to hold the device in an upright state.

[0038] By applying downward pressure to the handle 42 (which can make good use of the operator's weight), the second sleeve 40 is driven to move the drill 100 downward, the support spring 52 will be further compressed, and the lower end of the drill bit 200 will gradually approach the road surface 300 and eventually come into contact with the road surface 300, so that core sampling can be performed on the road surface 300.

[0039] In summary, this invention makes the operation of core drilling for road thickness sampling less labor-intensive, that is, it makes it easier to control the drill bit 200 to maintain a good perpendicularity to the road surface 300, effectively suppressing the degree of tilting of the drill bit 200, and thus helping to reduce the detection error of the road surface 300 thickness.

[0040] The outer peripheral surface 23 of the radial flange 22 can be made into a fine toothed surface to increase the surface friction coefficient of the outer peripheral surface 23, thereby making it easier to drive the first sleeve 20 downward relative to the top plate 14 and conveniently adjust the height position of the lower end of the drill bit 200. During operation, this reduces the downward stroke of the drill rig 100 or the second sleeve 40 relative to the base 10 during sampling, thus reducing the total amount of compression of the support spring 52 during the entire sampling process and achieving the purpose of saving effort.

[0041] By setting the first electromagnet part 11 and the second electromagnet part 31, and making them generate a magnetic attraction force that attracts each other when energized, the collar 30 is moved downward relative to the first sleeve 20. This helps to reduce the force required to press the second sleeve 40 downward, thus reducing labor intensity. Utilizing the magnetic attraction force of the two electromagnet parts, the collar 30 is pulled downward during core sampling, maintaining a stable and large downward (compressive) force on the drilling rig 100, which helps to improve the efficiency of the sampling operation.

[0042] By setting a foot pedal 12 on the base plate 13, it is convenient to step on the base 10 during operation so that it can be kept in a fixed position relative to the road surface 300, which can resist the adverse effects caused by vibration during operation.

[0043] An elastic layer is provided on the bottom / lower end surface of the base plate 13, which can increase the tightness of the connection between the base 10 and the road surface 300, and also play a buffering role. When the pedal 12 is provided, the elastic layer provided on the base plate 13 extends to the lower end surface of the pedal 12.

[0044] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit it. Many aspects of this utility model can be improved without departing from the overall concept. Those skilled in the art can modify or change the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or changes made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A pavement thickness detection device for highway engineering, characterized in that, include: The base consists of a bottom plate and a top plate arranged alternately on the upper and lower sides; The first sleeve has a radial flange formed at the upper end of its sleeve body, and a plurality of through holes arranged alternately around the circumference are provided on the radial flange. A collar is fitted onto the outside of the sleeve body of the first sleeve; The second sleeve has a radial flange two formed in the middle of its body, and multiple through holes are provided on the radial flange two, so that the through holes on the radial flange two are aligned with the through holes on the radial flange one; at least two flange blocks are formed on the outer wall of the radial flange two, and handles are provided on the flange blocks; the drilling machine is fixedly connected to the second sleeve, and the drill bit provided on the drilling machine can pass through the cavity of the first sleeve and extend outward from the lower port. And multiple support spring assemblies, including one-to-one matching guide slide rods and support springs; the lower end of the guide slide rod is fixedly connected to the collar, and the upper end passes through the through holes on radial flange one and radial flange two in sequence before being fitted with nuts; the support spring is fitted on the guide slide rod and its two ends are in contact with the upper end face of radial flange one and the lower end face of radial flange two respectively, thus supporting the second sleeve, so that the lower end of the drill bit installed on the drilling rig is positioned above the bottom surface of the base.

2. The road surface thickness detection device for highway engineering according to claim 1, characterized in that: A threaded through hole with its axis in the vertical direction is formed on the top plate of the base; an external thread matching the threaded through hole is formed on the outer wall of the sleeve body of the first sleeve.

3. The road surface thickness detection device for highway engineering according to claim 2, characterized in that: Fine teeth are formed on the outer peripheral surface of the radial flange and are distributed along the circumferential direction.

4. The road surface thickness detection device for highway engineering according to claim 1, characterized in that: Multiple pedals are formed on the outer peripheral surface of the base plate, and the multiple pedals are distributed on the left and right sides of the base plate.

5. The pavement thickness detection device for highway engineering according to any one of claims 1 to 4, characterized in that: A first electromagnet part is fixedly provided on the upper end surface of the top plate of the base; a second electromagnet part or an iron ring part is fixedly provided on the lower end surface of the collar.

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