A detection device for measuring the paving temperature and thickness of asphalt mixture

Abstract

The present invention discloses a detection device for measuring the paving temperature and thickness of asphalt mixtures, belonging to the technical field of road and bridge construction. The device includes a positioning frame, in which a sliding rod is slidably installed. A display panel with a processor is installed at the top of the sliding rod. A plug rod is slidably installed in the sliding rod in a limited manner. A chute for the sliding of the plug rod and a limiting groove communicated with the chute are provided in the sliding rod. A limiting plate that is slidably installed in the limiting groove in a limited manner is provided at the top of the plug rod. A pressure sensor is installed on the top wall of the limiting groove. A rangefinder is installed at the top of the sliding rod, and a temperature sensor is installed at the bottom end of the plug rod. By setting the limiting groove and the pressure sensor, the present invention enables the rangefinding work to start only after the plug rod contacts the surface of the asphalt mixture, ensuring the accuracy of the measurement of the thickness of the asphalt mixture. Moreover, the positioning frame can be placed at a position that does not contact the surface of the asphalt mixture, and the sliding rod can be ensured to be limited, so as to achieve the perpendicularity during the sliding process of the sliding rod and the plug rod.

Description

Technical Field

[0001] The invention belongs to the technical field of road and bridge construction, and particularly relates to a detection device for measuring the paving temperature and thickness of asphalt mixture. Background Art

[0002] As the surface layer of highway asphalt mixture directly bearing the wheels and loads, the paving quality is an important factor affecting the service and durability of the road surface. Among them, the construction temperature and paving thickness are the key factors in quality control during the construction process of asphalt pavement. For the pavement paved with hot-mix mixture, if the temperature of the mixture drops rapidly during construction, it is easy to cause insufficient compaction of the road surface; or when the temperature difference between the newly paved surface layer and the already paved surface layer is large, resulting in large temperature changes in the surrounding mixture, diseases will occur at the joints of different structural layers of the asphalt pavement. In road engineering, the thickness of each structural layer is closely related to the overall strength and density of the road. Only when the thickness is ensured can the layers and overall strength of the road surface be guaranteed, and it also has a certain control effect on the road surface elevation. If the surface layer thickness is insufficient, cracks will appear on the road surface in a short time. As water seeps into the cracks, the road surface strength will decrease significantly, resulting in road surface diseases such as potholes and spalling, accelerating the damage of the asphalt pavement surface layer and shortening the service life of the road surface.

[0003] The traditional detection method for measuring the paving temperature and thickness of asphalt mixture is manual. For example, a temperature and thickness detection device for paving asphalt disclosed in the patent with the publication number CN215810972 U detects the thickness of the asphalt mixture by measuring the insertion displacement of the insertion rod inserted into the bottom of the asphalt mixture. When measuring with this device, since the displacement of the insertion rod is directly measured, it is necessary to ensure that the bottom end of the insertion rod and the bottom wall of the base are in the same plane, and it is also necessary to ensure the flatness of the asphalt mixture. If the surface of the asphalt mixture layer is uneven or the insertion rod is worn after repeated use, resulting in a gap between the bottom end of the insertion rod and the bottom wall of the base, it will affect the accuracy of the thickness detection of the asphalt mixture.

[0004] Therefore, it is necessary to propose a detection device for measuring the paving temperature and thickness of asphalt mixture to solve the above problems. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a detection device for measuring the paving temperature and thickness of asphalt mixture, which is used to solve the problem of low accuracy of thickness measurement caused by the unevenness of the asphalt mixture or the gap between the bottom end of the insertion rod and the bottom wall of the base in the prior art.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] The present invention provides a detection device for measuring the paving temperature and thickness of asphalt mixture, including a positioning frame. A sliding rod is slidably installed in the positioning frame. A display panel with a processor is installed at the top of the sliding rod. A plug rod is slidably installed in the sliding rod in a limited manner. A chute for the plug rod to slide and a limiting groove communicating with the chute are provided in the sliding rod. A limiting plate that is slidably installed in the limiting groove in a limited manner is provided at the top of the plug rod. A pressure sensor is installed on the top wall of the limiting groove. A rangefinder for detecting the distance between the top end of the sliding rod and the top end of the positioning frame is installed at the top of the sliding rod. A temperature measuring sensor is installed at the bottom end of the plug rod. The pressure sensor is used to open or close the rangefinder through the processor with the detected pressure signal.

[0008] Further, at least two positioning blocks are installed on the positioning frame. The sliding rod is slidably installed on the positioning blocks. The sliding rods on adjacent positioning blocks are connected by a connecting rod. Pressing down the connecting rod can make multiple sliding rods move synchronously.

[0009] Further, a slide rail arranged in the horizontal direction is provided on the positioning frame. The positioning block is slidably installed on the slide rail. The sliding rod is sleeved on the connecting rod and can slide along the sliding rod. The sliding rod is arranged parallel to the slide rail.

[0010] Further, a sleeve coaxially arranged with the plug rod is fixedly installed at the bottom end of the positioning block. The plug rod is located inside the sleeve. A plurality of fixing plates are circumferentially arranged on the inner side of the sleeve with the axis of the plug rod as the center. A ball that can contact the outer peripheral wall of the plug rod is installed on the side of the fixing plate close to the plug rod. A strip-shaped groove corresponding to each of the plurality of fixing plates is provided on the sliding rod.

[0011] Further, a plurality of positioning holes are provided on the slide rail. A pin that cooperates with the positioning holes is slidably installed on the positioning block. After sliding the positioning block to a preset position, the positioning block can be fixed by the cooperation of the pin and the positioning holes.

[0012] Further, a support plate is detachably installed at the bottom end of the positioning frame. The cross-sectional area of the support plate is larger than the cross-sectional area of the positioning frame. A notch for the plug rod to pass through is provided on the support plate. The support plate is used to be placed on the surface of the asphalt mixture.

[0013] Further, the cross-section of the positioning frame is rectangular. A support rod is slidably installed at the bottom end of the positioning frame. A support seat is installed at the bottom end of the support rod. The cross-sectional area of the support seat is larger than the cross-sectional area of the support rod.

[0014] The beneficial effects of the present invention are as follows:

[0015] By providing a limiting groove and a pressure sensor, the present invention enables the distance measurement work to start only after the insertion rod contacts the surface of the asphalt mixture, ensuring the accuracy of the thickness measurement of the asphalt mixture. Moreover, the positioning frame can be placed at a position not in contact with the surface of the asphalt mixture and can ensure the limitation of the sliding rod to ensure the perpendicularity of the sliding rod and the insertion rod during the sliding process.

[0016] Other advantages, objectives, and features of the present invention will be described in the subsequent specification and will be obvious to those skilled in the art to some extent, or those skilled in the art can obtain teachings from the practice of the present invention. The objectives and other advantages of the present invention can be achieved and obtained through the following specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] To make the objectives, technical solutions, and beneficial effects of the present invention clearer, the present invention provides the following drawings for description:

[0018] Figure 1 It is a structural sectional view of the cooperation between the sliding rod and the insertion rod according to an embodiment of the present invention;

[0019] Figure 2 It is an embodiment of the present invention Figure 1 The enlarged view of the partial A;

[0020] Figure 3 It is a schematic diagram of the overall structure according to an embodiment of the present invention.

[0021] The reference numerals in the drawings are as follows: positioning frame 1, positioning block 101, slide rail 102, positioning hole 103, pin 104, sleeve 105, fixing plate 106, ball 107, sliding rod 2, chute 201, limiting groove 202, strip groove 203, insertion rod 3, limiting plate 301, pressure sensor 4, distance measuring instrument 5, connecting rod 6, support plate 7, notch 701, support rod 8, support base 9. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] As Figures 1 to 3As shown in the figure, the present invention provides a detection device for measuring the paving temperature and thickness of asphalt mixture, comprising: a positioning frame 1, a sliding rod 2 is slidably installed in the positioning frame 1, a display panel with a processor is installed at the top of the sliding rod 2, a plug rod 3 is limitedly slidably installed in the sliding rod 2, a chute 201 and a limiting groove 202 communicating with the chute 201 are arranged in the sliding rod 2, a limiting plate 301 is arranged on the plug rod 3, the limiting plate 301 is slidably installed in the limiting plate 301, the plug rod 3 is slidably installed in the chute 201, a pressure sensor 4 is installed on the top wall of the limiting groove 202, a rangefinder 5 for detecting the distance between the top end of the sliding rod 2 and the top wall of the positioning frame 1 is installed at the top of the sliding rod 2, a temperature measuring sensor is installed at the bottom end of the plug rod 3, and the pressure sensor 4 is used to open or close the rangefinder 5 through the processor with the detected pressure signal.

[0023] In this solution, when using this device to detect the temperature and thickness of asphalt mixture paving, the positioning frame 1 is placed on the surface of the asphalt mixture or on an engineering vehicle or other fixed mechanism located on the asphalt mixture during the actual operation to ensure the stability of the positioning frame 1 during detection. In the initial state before detection, there is a gap between the bottom end of the plug rod 3 and the surface of the asphalt mixture. During detection, the sliding rod 2 is pressed to move the sliding rod 2 on the positioning frame 1 in the direction close to the asphalt surface. At this time, the limiting plate 301 on the plug rod 3 contacts the bottom wall of the limiting groove 202 under its own weight. The plug rod 3 moves synchronously with the sliding rod 2 during the movement of the sliding rod 2. When the bottom end of the plug rod 3 contacts the surface of the asphalt mixture, continuing to move the sliding rod 2 can make the limiting plate 301 on the plug rod 3 move in the direction close to the top wall of the limiting groove 202 until the limiting plate 301 contacts the top wall of the limiting groove 202. Continuing to press down the sliding rod 2 can make the pressure sensor 4 sense the pressure signal. At this time, the pressure sensor 4 transmits the pressure signal to the processor, and the rangefinder 5 is controlled to be turned on through the processor. At this time, the distance between the top end of the sliding rod 2 and the top end of the positioning frame 1 detected by the rangefinder 5 is the initial distance and is displayed as 0 on the display panel. Then, continue to press down the sliding rod 2 to make the sliding rod 2 drive the plug rod 3 to insert into the asphalt mixture. During the insertion process, the rangefinder 5 can detect the change in the distance between the top end of the sliding rod 2 and the top end of the positioning frame 1 in real time. Until the plug rod 3 is inserted into the bottom of the asphalt mixture, the distance displayed on the display panel is the thickness of the asphalt mixture. After the plug rod 3 is inserted into the bottom, the measured temperature is displayed on the display panel through the temperature measuring sensor.

[0024] In this solution, by setting the limiting groove 202 and the pressure sensor 4, the ranging work starts only after the plug rod 3 contacts the surface of the asphalt mixture, which ensures the accuracy of the measurement of the thickness of the asphalt mixture. Moreover, the positioning frame 1 can be placed at a position not in contact with the surface of the asphalt mixture, and the limiting of the sliding rod 2 is ensured to ensure the perpendicularity of the sliding rod 2 and the plug rod 3 during the sliding process.

[0025] In an embodiment of the present invention, at least two positioning blocks 101 are installed on the positioning frame 1, the sliding rod 2 is slidably installed on the positioning blocks 101, the sliding rods 2 on multiple positioning blocks 101 are connected by a connecting rod 6, and pressing down the connecting rod 6 can make the multiple sliding rods 2 move synchronously.

[0026] In this solution, the sliding rod 2 can slide on the positioning block 101 along the axial direction of the sliding rod 2. By providing more than two positioning blocks 101, the thicknesses at different positions on the asphalt mixture can be measured simultaneously. And by providing the connecting rod 6, pressing down the connecting rod 6 can make the multiple sliding rods 2 move synchronously. Due to the arrangement of the limiting groove 202 and the pressure sensor 4, when pressing down the connecting rod 6, the distance measuring instruments 5 on different sliding rods 2 measure distances respectively, and the average value of the thicknesses of the asphalt mixture measured by the distance measuring instruments 5 on the multiple sliding rods 2 is obtained to improve the measurement accuracy of the thickness of the asphalt mixture. If the thicknesses measured by the multiple distance measuring instruments 5 vary greatly, it can be judged that the flatness of the surface of the asphalt mixture is low.

[0027] In an embodiment of the present invention, a slide rail 102 arranged in the horizontal direction is provided on the positioning frame 1, the positioning block 101 is slidably installed on the slide rail 102, the sliding rod 2 is sleeved on the connecting rod 6 and can slide along the sliding rod 2, and the sliding rod is arranged parallel to the slide rail.

[0028] In this solution, by sliding the positioning block 101 along the slide rail 102, the distance between adjacent positioning blocks 101 can be adjusted, thereby adjusting the distance between adjacent insertion rods 3, that is, adjusting the measurement spacing when different insertion rods 3 measure.

[0029] In an embodiment of the present invention, a sleeve 105 coaxially arranged with the insertion rod 3 is fixedly installed at the bottom end of the positioning block 101, the insertion rod 3 is located inside the sleeve 105, a plurality of fixing plates 106 are circumferentially arranged on the inner side of the sleeve 105 with the axis of the insertion rod 3 as the center, a ball 107 capable of contacting the outer peripheral wall of the insertion rod 3 is installed on the side of the fixing plate 106 close to the insertion rod 3, and strip-shaped grooves 203 corresponding to the plurality of fixing plates 106 one by one are provided on the sliding rod 2.

[0030] In this solution, the insertion rod 3 is limited by providing the fixing plate 106 and the ball 107 to ensure the stability of the insertion rod 3 during the moving process, and to avoid the deformation of the insertion rod 3 caused by the lack of limitation of the insertion rod 3 when squeezing the sliding rod 2 for the loose-laid asphalt mixture with a small paving coefficient; by providing strip-shaped grooves 203 at positions corresponding to the fixing plates 106 on the sliding rod 2, when sliding the sliding rod 2, the sliding rod 2 can slide down along the insertion rod 3; by the arrangement of the ball 107, the friction between the insertion rod 3 and the fixing plate 106 is reduced, and it is avoided that the limiting plate 301 moves in the limiting groove 202 due to the frictional force before the insertion rod 3 contacts the surface of the asphalt mixture.

[0031] In an embodiment of the present invention, a plurality of positioning holes 103 are provided on the sliding rail 102, and a latch 104 that cooperates with the positioning holes 103 is slidably installed on the positioning block 101. After the positioning block 101 is slid to a preset position, the positioning block 101 can be fixed by the cooperation of the latch 104 and the positioning holes 103 to ensure the stability during the sliding of the sliding rod 2.

[0032] In an embodiment of the present invention, a support plate 7 is detachably installed at the bottom end of the positioning frame 1. The cross-sectional area of the support plate 7 is larger than the cross-sectional area of the positioning frame 1. A notch 701 for the insertion rod 3 to pass through is provided on the support plate 7. The support plate 7 is used for placing on the surface of the asphalt mixture.

[0033] In this solution, the positioning frame 1 and the support plate 7 are detachably connected by bolts. By providing the support plate 7, the contact area between the detection device and the surface of the asphalt mixture is increased, the pressure on the asphalt mixture is reduced, and the perpendicularity of the moving slide bar 2 is ensured when the detection device is placed on the surface of the asphalt mixture.

[0034] In an embodiment of the present invention, the cross-section of the positioning frame 1 is rectangular, and a support rod 8 is slidably installed at the bottom end of the positioning frame 1. A support seat 9 is installed at the bottom end of the support rod 8. The cross-sectional area of the support seat 9 is larger than the cross-sectional area of the support rod 8.

[0035] In this solution, by providing the support rod 8 and the support seat 9 and fixing the support rod 8 at a preset position after sliding, the distance between the positioning frame 1 and the surface of the asphalt mixture can be adjusted. When the positioning frame 1 is not placed on the surface of the asphalt mixture, the support seat 9 is brought into contact with the surface of the asphalt mixture by sliding the support rod 8 so that the bottom wall of the positioning frame 1 is parallel to the surface of the asphalt mixture to adapt to the road surface slope; when the positioning frame 1 is placed on the surface of the asphalt mixture, the support seat 9 and the support plate 7 are fixed by bolts, and the support plate 7 is placed on the surface of the asphalt mixture.

[0036] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A detection device for measuring the temperature and thickness of asphalt mixture paving, comprising a positioning frame, characterized in that: A slide bar is slidably installed in the positioning frame, a display panel with a processor is installed on the top of the slide bar, an insertion rod is limitedly slidably installed in the slide bar, a slide groove for sliding the insertion rod and a limit groove connected to the slide groove are provided in the slide bar, a limit plate for limited sliding in the limit groove is provided on the top of the insertion rod, a pressure sensor is installed on the top wall of the limit groove, a rangefinder for detecting the distance between the top of the slide bar and the top of the positioning frame is installed on the top of the slide bar, a temperature sensor is installed on the bottom of the insertion rod, and the pressure sensor is used to transmit the detected pressure signal through the processor to open or close the rangefinder ; At least two positioning blocks are installed on the positioning frame, and the sliding rod is slidably installed on the positioning blocks. The sliding rods on adjacent positioning blocks are connected by connecting rods, and pressing down the connecting rods can make multiple sliding rods move synchronously; in the initial state before detection, a gap is provided between the bottom end of the insertion rod and the surface of the asphalt mixture, and a support plate is detachably installed at the bottom end of the positioning frame, and the cross-sectional area of ​​the support plate is larger than the cross-sectional area of ​​the positioning frame, and a notch is provided on the support plate for the insertion rod to pass through, and the support plate is used to be placed on the surface of the asphalt mixture; the cross-section of the positioning frame is rectangular, and a support plate is slidably installed at the bottom end of the positioning frame The support rod has a support seat installed at the bottom end of the support rod, and the cross-sectional area of ​​the support seat is larger than the cross-sectional area of ​​the support rod; during the detection, the sliding rod is pressed to make the sliding rod move on the positioning frame in the direction close to the asphalt surface. At this time, the limit plate on the insertion rod contacts the bottom wall of the limit groove under its own weight, and the insertion rod is driven to move synchronously during the movement of the sliding rod. When the bottom end of the insertion rod contacts the surface of the asphalt mixture, continuing to move the sliding rod can make the limit plate on the insertion rod move in the direction close to the top wall of the limit groove until the limit plate contacts the top wall of the limit groove. Continuing to press down the sliding rod can make the pressure sensor sense the pressure signal. At this time The pressure sensor transmits the pressure signal to the processor, which controls the rangefinder to turn on. At this time, the distance between the top of the sliding rod and the top of the positioning frame detected by the rangefinder is the initial distance, and is displayed as 0 on the display panel. The sliding rod is then continued to be pressed down to allow the sliding rod to drive the insertion rod into the asphalt mixture. During the insertion process, the rangefinder can detect the change in the distance between the top of the sliding rod and the top of the positioning frame in real time until the insertion rod is inserted into the bottom of the asphalt mixture. The distance displayed on the display panel is the thickness of the asphalt mixture. After the insertion rod is inserted into the bottom, the measured temperature is displayed on the display panel through the temperature sensor.

2. The detection device for measuring the temperature and thickness of asphalt mixture paving according to claim 1 is characterized in that: The positioning frame is provided with a slide rail arranged in the horizontal direction, the positioning block is slidably mounted on the slide rail, the slide rod is sleeved on the connecting rod and can slide along the slide rod, and the slide rod is arranged parallel to the slide rail.

3. The detection device for measuring the temperature and thickness of asphalt mixture paving according to claim 2 is characterized in that: A sleeve coaxially arranged with the insertion rod is fixedly installed at the bottom end of the positioning block, the insertion rod is located in the sleeve, and a plurality of fixing plates are circumferentially arranged on the inner side of the sleeve with the axis of the insertion rod as the center, and a ball that can contact the outer peripheral wall of the insertion rod is installed on the fixing plate close to the side of the insertion rod, and the sliding rod is provided with strip grooves corresponding to the plurality of fixing plates one by one.

4. The detection device for measuring the temperature and thickness of asphalt mixture paving according to claim 3 is characterized in that: The slide rail is provided with a plurality of positioning holes, and a latch matched with the positioning holes is slidably mounted on the positioning block. After the positioning block is slid to a preset position, the positioning block can be fixed by the latch matching with the positioning holes.

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