Device for detecting loose paving thickness of asphalt pavement in highway engineering

Abstract

The utility model belongs to the technical field of thickness detection, and particularly relates to a highway engineering asphalt pavement loose laying thickness detection device which comprises a measuring scale and a bottom plate, the bottom plate is fixedly connected to the lower side of the measuring scale, measuring mechanisms are arranged at the inner end and the outer end of the measuring scale, and each measuring mechanism comprises a sliding block connected to the upper end in the measuring scale. According to the device for detecting the loose paving thickness of the asphalt pavement in the highway engineering, when asphalt on a highway is detected, a bottom plate is firstly placed on the asphalt, then a pressing rod is moved downwards, meanwhile, a sliding block moves downwards to drive a measuring needle to move downwards until the lower end of the measuring needle moves to the surface of the asphalt, and a rotating handle is rotated to enable a threaded rod to rotate to drive an adjusting block to move; after the pointer moves to point to the zero scale, the rotating handle is not rotated any more, then the pressing rod is pushed downwards, the measuring needle is pressed downwards into the asphalt until the measuring needle is inserted into the bottom end of the asphalt, at the moment, the scale pointed by the pointer is recorded, namely the thickness of the asphalt, and detection of the rear end of the asphalt is completed.

Description

Technical Field

[0001] The utility model relates to the technical field of thickness detection, in particular to a device for detecting the loose paving thickness of an asphalt pavement in a highway engineering project. Background Art

[0002] Loose laying thickness refers to the thickness of the asphalt mixture after it is spread by the paver before the asphalt pavement is compacted. More and more highways are using asphalt mixture to build pavement. Testing the loose laying thickness of asphalt during the construction process is a necessary procedure. Due to the loose laying thickness of the asphalt mixture determines the total thickness of the pavement after compaction, insufficient loose laying thickness often leads to the following problems: the porosity of the pavement structure layer is too large, which is easy to cause early water damage. Therefore, testing the loose laying thickness of asphalt pavement is of great significance.

[0003] However, the measuring needle on the existing detection device is easily worn out after long-term use, and cannot be adjusted or replaced, which seriously affects the measurement accuracy, thus causing great inconvenience to the detection personnel.

[0004] For example, Chinese patent CN214372168U discloses a device for detecting the loose paving thickness of asphalt pavement in highway engineering. The positioning screw on the positioning nut is rotated clockwise to press against the detection ruler to fix the measured size. Finally, the screw is rotated counterclockwise to disengage the screw from the measuring needle, so that the measuring needle is taken out for replacement. After replacement, the screw is rotated clockwise to press against the measuring needle to complete the adjustment and replacement of the measuring needle, thereby solving the problem of the measuring needle being worn out due to long-term use and being unable to be adjusted and replaced.

[0005] However, since the bottom plate of the detection device is a horizontal plate, when checking the asphalt thickness on an undulating road surface, the horizontal bottom plate cannot be close to the ground, resulting in a gap between the bottom end of the measuring needle and the asphalt ground. As a result, when the bottom end of the measuring needle first touches the ground during the detection process, the pointer on its upper end does not point to the zero scale, ultimately resulting in inaccurate detected thickness.

[0006] For this reason, we urgently need to provide a detection device for the loose paving thickness of asphalt pavement in highway engineering. Utility Model Content

[0007] The utility model aims to provide a device for detecting the loose paving thickness of an asphalt pavement in a highway engineering project, so as to solve the problems raised in the above-mentioned background technology.

[0008] To achieve the above purpose, the utility model provides the following technical solutions: a device for detecting the loose paving thickness of asphalt pavement in highway engineering, comprising a measuring ruler and a base plate, wherein the base plate is fixedly connected to the lower side of the measuring ruler, and measuring mechanisms are arranged at the inner and outer ends of the measuring ruler.

[0009] The measuring mechanism comprises a sliding block connected to the inner upper end of the measuring ruler, a measuring needle is connected to the lower end of the sliding block, limit blocks are fixedly connected to the left and right sides of the sliding block, a bearing is connected to the inner upper end of the sliding block, a threaded rod is fixedly connected to the inner side of the bearing, a rotating handle is fixedly connected to the lower end of the threaded rod, an adjusting block is connected to the outer end of the threaded rod, a pointer is fixedly connected to the left rear end of the adjusting block, and a pressure rod is fixedly connected to the upper front end of the sliding block;

[0010] The lower side of the sliding block is connected with a disassembly and assembly mechanism, and the disassembly and assembly mechanism includes a mounting sleeve fixedly connected to the lower side of the sliding block, and the inner front end of the mounting sleeve is connected with a fixing bolt;

[0011] A second threaded hole is provided at the front end of the interior of the mounting sleeve, and a socket is provided at the front of the upper end of the interior of the measuring needle. The outer side of the fixing bolt is threadedly connected to the inner side of the second threaded hole, and the outer side of the rear end of the fixing bolt is plugged into the inner side of the socket, so that the fixing bolt is threadedly connected to the threaded hole. At the same time, the rear end of the fixing bolt will move into the socket, so that the fixing bolt is fixed to the inner side of the mounting sleeve.

[0012] A further improvement is that a groove with an opening facing left is provided at the front end of the sliding block, the bearing is fixed to the inside of the sliding block at a middle position of the upper end of the groove, and a circular hole is provided inside the sliding block at a middle position of the lower end of the groove, and the outer side of the lower end of the threaded rod is rotatably connected to the inner side of the circular hole, so that when the threaded rod rotates, its upper end rotates with the inner ring of the bearing, and its lower end is rotatably connected to the inner side of the circular hole, so that the threaded rod can only maintain vertical stable rotation.

[0013] A further improvement is that a vertical slide groove is provided in the middle of the measuring ruler, and limit grooves are symmetrically provided at the left and right ends of the slide groove inside the measuring ruler, and the outer side of the rear end of the sliding block is slidably connected to the inner side of the slide groove, and the outer side of the limit block is slidably connected to the inner side of the limit groove. Therefore, when the sliding block slides along the inner side of the slide groove, the limit blocks at the left and right ends thereof will slide along the inner side of the limit groove.

[0014] A further improvement is that a sliding hole is provided at the bottom end of the measuring ruler and the middle position of the bottom plate below the slide slot, and a rubber ring is fixedly connected to the inside of the sliding hole, and the outside of the measuring needle is slidably connected to the inside of the rubber ring inside the sliding hole. Therefore, when the measuring needle is pulled out of the ground and retracted into the slide slot, the measuring needle will pass through the inside of the rubber ring inside the sliding hole, so that the asphalt sticking to the outside of the measuring needle is scraped off by the sliding hole on the lower side of the bottom plate, which has the effect of cleaning the outer surface of the measuring needle.

[0015] A further improvement is that a first threaded hole is opened in the middle position inside the adjusting block, the outer side of the threaded rod is threadedly connected to the inner side of the first threaded hole, the outer side of the adjusting block is slidably connected to the inner side of the groove inside the sliding block, and a scale line is set at the left end of the front side of the measuring ruler, so that when the rotating handle is turned to rotate the threaded rod, the adjusting block at the outer end can be driven to slide along the inner side of the groove inside the sliding block, and the pointer at the left end can be driven to move together.

[0016] In summary, the present application discloses a device for detecting the loose paving thickness of an asphalt pavement in a highway engineering project.

[0017] According to the technical solution, when the base plate is placed on the undulating asphalt road surface, the sliding block and the measuring needle are moved downward by first pushing the pressure rod downward until the measuring needle moves down to contact the asphalt road surface, and then the rotating handle is turned to rotate the threaded rod, driving the adjustment block to move until the pointer moves to point to the zero scale, so that the measuring needle can return to zero when it contacts the ground surface before working, and then when the measuring needle is inserted into the asphalt, the scale position pointed to by the pointer is the thickness of the asphalt, so that when the detection device is located on an undulating asphalt road for detection, accurate detection can still be performed.

[0018] Furthermore, when the measuring needle under the sliding block is worn out due to long-term use, it can be removed from the front end of the mounting sleeve by turning the fixing bolt, and the measuring needle can be pulled downward from the inner side of the mounting sleeve to complete the disassembly of the measuring needle. The upper end of the new measuring needle is then inserted into the mounting sleeve, and the fixing bolt is then threaded into the threaded hole. At the same time, the rear end of the fixing bolt is moved into the socket so that the fixing bolt is fixed to the inner side of the mounting sleeve, completing the installation of the measuring needle at the lower end of the sliding block. The measuring needle is replaced, and the measuring needle can be replaced regularly through this disassembly and assembly method to ensure that the measuring needle in the detection device maintains accurate asphalt rear end detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a front view of the main structure of the utility model;

[0020] Figure 2 This is a bottom view of the main structure of the utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the lower end of the sliding block of the utility model;

[0022] Figure 4 This is a schematic diagram of the internal structure of the sliding block of the utility model;

[0023] Figure 5 It is a structural schematic diagram of the fixing bolt of the utility model.

[0024] In the figure: 1, measuring ruler; 2, base plate; 301, sliding block; 302, measuring needle; 303, limit block; 304, bearing; 305, threaded rod; 306, rotating handle; 307, adjusting block; 308, pointer; 309, pressure rod; 401, mounting sleeve; 402, fixing bolt. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] See also Figure 1-Figure 5 The utility model provides a technical solution: a device for detecting the loose paving thickness of an asphalt pavement in a highway engineering project, comprising a measuring ruler 1 and a base plate 2, wherein the base plate 2 is fixedly connected to the lower side of the measuring ruler 1, and measuring mechanisms are arranged at the inner and outer ends of the measuring ruler 1.

[0027] The measuring mechanism includes a sliding block 301 connected to the upper end of the inner part of the measuring ruler 1, a measuring needle 302 is connected to the lower end of the sliding block 301, and limit blocks 303 are fixedly connected to the left and right sides of the sliding block 301. A vertical slide groove is provided in the middle position of the inner part of the measuring ruler 1, and limit grooves are symmetrically provided at the left and right ends of the slide groove inside the measuring ruler 1. The outer side of the rear end of the sliding block 301 is slidably connected to the inner side of the slide groove, and the outer side of the limit block 303 is slidably connected to the inner side of the limit groove. Therefore, when the sliding block 301 slides along the inner side of the slide groove, the limit blocks 303 at its left and right ends will slide along the inner side of the limit groove, so that the sliding block 301 can only slide in the vertical direction along the inner side of the slide groove.

[0028] A sliding hole is provided at the bottom end of the measuring ruler 1 and the middle position of the bottom plate 2 below the slide groove, and a rubber ring is fixedly connected to the inner side of the sliding hole. The outer side of the measuring needle 302 is slidably connected to the inner side of the rubber ring inside the sliding hole. Therefore, when the measuring needle 302 is pulled out of the ground and retracted into the slide groove, the measuring needle 302 will pass through the inner side of the rubber ring inside the sliding hole, so that the asphalt sticking to the outer side of the measuring needle 302 is scraped off by the sliding hole on the lower side of the bottom plate 2, thereby cleaning the outer surface of the measuring needle 302.

[0029] A bearing 304 is connected to the upper end of the inner part of the sliding block 301, and a threaded rod 305 is fixedly connected to the inner side of the bearing 304. A groove with an opening facing left is provided at the front end of the inner part of the sliding block 301, and the bearing 304 is fixed to the inner part of the sliding block 301 at the middle position of the upper end of the groove. A circular hole is provided in the inner part of the sliding block 301 at the middle position of the lower end of the groove, and the outer side of the lower end of the threaded rod 305 is rotatably connected to the inner side of the circular hole, so that when the threaded rod 305 rotates, its upper end rotates with the inner ring of the bearing 304, and its lower end is rotatably connected to the inner side of the circular hole, so that the threaded rod 305 can only maintain vertical stable rotation.

[0030] The lower end of the threaded rod 305 is fixedly connected to a rotating handle 306 , the outer end of the threaded rod 305 is connected to an adjusting block 307 , the left rear end of the adjusting block 307 is fixedly connected to a pointer 308 , and the upper front end of the sliding block 301 is fixedly connected to a pressing rod 309 .

[0031] A first threaded hole is provided in the middle of the adjusting block 307, the outer side of the threaded rod 305 is threadedly connected to the inner side of the first threaded hole, the outer side of the adjusting block 307 is slidably connected to the inner side of the groove inside the sliding block 301, and a scale line is provided at the front left end of the measuring ruler 1, so that when the rotating handle 306 is turned to rotate the threaded rod 305, the adjusting block 307 at the outer end can be driven to slide along the inner side of the groove inside the sliding block 301, and the pointer 308 at the left end can be driven to move together, and then when the base plate 2 is placed on the undulating asphalt road surface, the pressing rod 309 is pushed down first to make The sliding block 301 and the measuring needle 302 move downward until the measuring needle 302 moves downward to contact the surface of the asphalt road, and then the rotating handle 306 is turned to rotate the threaded rod 305, driving the adjustment block 307 to move until the pointer 308 moves to point to the zero scale, so that the measuring needle 302 can return to zero when it contacts the ground surface before working, and then after the measuring needle 302 is inserted into the asphalt, the scale position pointed to by the pointer 308 is the thickness of the asphalt, so that when the detection device is located on an undulating asphalt road for detection, accurate detection can still be performed.

[0032] The lower side of the sliding block 301 is connected with a disassembly and assembly mechanism, which includes a mounting sleeve 401 fixedly connected to the lower side of the sliding block 301 , and a fixing bolt 402 is connected to the inner front end of the mounting sleeve 401 .

[0033] A second threaded hole is provided at the front end of the mounting sleeve 401, and a socket is provided at the front of the upper end of the measuring needle 302. The outer side of the fixing bolt 402 is threadedly connected to the inner side of the second threaded hole, and the outer side of the rear end of the fixing bolt 402 is plugged into the inner side of the socket. After the upper end of the measuring needle 302 is slid to the inner side of the mounting sleeve 401, the fixing bolt 402 is threadedly connected to the threaded hole, and the rear end of the fixing bolt 402 is moved into the socket, so that the fixing bolt 402 is fixed to the inner side of the mounting sleeve 401, thereby completing the installation of the measuring needle 302 on the lower side of the sliding block 301.

[0034] Working principle: When testing asphalt on the road, first place the base plate 2 on the asphalt, then move the pressure rod 309 downward, and at the same time, move the sliding block 301 downward to drive the measuring needle 302 downward, until the lower end of the measuring needle 302 moves to the surface of the asphalt, turn the rotating handle 306 to make the threaded rod 305 rotate and drive the adjustment block 307 to move, until the pointer 308 moves to point to the zero scale, do not turn the rotating handle 306 anymore, then push the pressure rod 309 downward to press the measuring needle 302 down into the asphalt until it is inserted into the bottom of the asphalt. At this time, record the scale pointed by the pointer 308, which is the thickness of the asphalt, and complete the detection of the rear end of the asphalt.

[0035] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

Claims

1. A device for detecting the loose paving thickness of an asphalt pavement in a highway engineering project, comprising a measuring ruler (1) and a base plate (2), wherein the base plate (2) is fixedly connected to the lower side of the measuring ruler (1), and characterized in that: The measuring ruler (1) is provided with measuring mechanisms at both inner and outer ends; The measuring mechanism comprises a sliding block (301) connected to the inner upper end of the measuring ruler (1); a measuring needle (302) is connected to the lower end of the sliding block (301); limit blocks (303) are fixedly connected to the left and right sides of the sliding block (301); a bearing (304) is connected to the inner upper end of the sliding block (301); a threaded rod (305) is fixedly connected to the inner side of the bearing (304); a rotating handle (306) is fixedly connected to the lower end of the threaded rod (305); an adjusting block (307) is connected to the outer end of the threaded rod (305); a pointer (308) is fixedly connected to the left rear end of the adjusting block (307); and a pressure rod (309) is fixedly connected to the upper front end of the sliding block (301); The lower side of the sliding block (301) is connected to a disassembly and assembly mechanism, the disassembly and assembly mechanism comprising a mounting sleeve (401) fixedly connected to the lower side of the sliding block (301), the inner front end of the mounting sleeve (401) being connected to a fixing bolt (402); A second threaded hole is provided at the front end of the mounting sleeve (401), a socket is provided at the front end of the upper end of the measuring needle (302), the outer side of the fixing bolt (402) is threadedly connected to the inner side of the second threaded hole, and the outer side of the rear end of the fixing bolt (402) is plugged into the inner side of the socket.

2. The device for detecting the loose paving thickness of an asphalt pavement in a highway engineering project according to claim 1 is characterized in that: The front end of the sliding block (301) is provided with a groove with an opening facing leftwards, the bearing (304) is fixed to the inside of the sliding block (301) at a middle position of the upper end of the groove, the inside of the sliding block (301) is provided with a circular hole at a middle position of the lower end of the groove, and the outer side of the lower end of the threaded rod (305) is rotatably connected to the inner side of the circular hole.

3. The device for detecting the loose paving thickness of an asphalt pavement in a highway engineering project according to claim 1 is characterized in that: A vertical slide groove is provided in the middle of the measuring ruler (1), and limit grooves are symmetrically provided at the left and right ends of the slide groove inside the measuring ruler (1), the outer side of the rear end of the sliding block (301) is slidably connected to the inner side of the slide groove, and the outer side of the limit block (303) is slidably connected to the inner side of the limit groove.

4. The device for detecting the loose paving thickness of an asphalt pavement in a highway engineering project according to claim 1 is characterized in that: A sliding hole is provided at the bottom end of the measuring ruler (1) and at a middle position below the sliding groove inside the bottom plate (2), and a rubber ring is fixedly connected to the inside of the sliding hole. The outside of the measuring needle (302) is slidably connected to the inside of the rubber ring inside the sliding hole.

5. The device for detecting the loose paving thickness of an asphalt pavement in a highway engineering project according to claim 1 is characterized in that: A first threaded hole is provided in the middle of the adjusting block (307), the outer side of the threaded rod (305) is threadedly connected to the inner side of the first threaded hole, the outer side of the adjusting block (307) is slidably connected to the inner side of the groove in the sliding block (301), and a scale line is provided at the front left end of the measuring ruler (1).

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