Detection device for measuring paving temperature and thickness of asphalt mixture

Abstract

The invention discloses a detection device for measuring the paving temperature and thickness of an asphalt mixture, and belongs to the technical field of road and bridge construction.The detection device comprises 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, and an insertion rod is slidably installed in the sliding rod in a limited mode; a sliding groove for the insertion rod to slide and a limiting groove communicated with the sliding groove are formed in the sliding rod, a limiting plate sliding in the limiting groove in a limited mode is arranged at the top of the insertion rod, a pressure sensor is installed on the top wall of the limiting groove, a distance measuring instrument is installed at the top of the sliding rod, and a temperature measuring sensor is installed at the bottom end of the insertion rod. According to the asphalt mixture thickness measuring device, by arranging the limiting groove and the pressure sensor, distance measuring work is started only after the inserting rod makes contact with the surface of an asphalt mixture, the thickness measuring accuracy of the asphalt mixture is guaranteed, the positioning frame can be placed at the position not making contact with the surface of the asphalt mixture, and limiting of the sliding rod is guaranteed; therefore, the perpendicularity of the sliding rod and the inserting rod in the sliding process is achieved.

Description

Technical Field

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

[0002] As the road surface layer that directly bears the wheels and loads, the paving quality of the highway asphalt mixture surface layer is an important factor affecting the use and durability of the road surface. Among them, the construction temperature and paving thickness are the key factors for quality control in the asphalt pavement construction process. For the road surface paved with hot mix, if the temperature of the mixture drops quickly 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 paved surface layer is large, resulting in a large temperature change of the surrounding mixture, the connection between different structural layers of the asphalt pavement will produce diseases. In pavement engineering, the thickness of each structural layer is closely related to the overall strength density of the road. Only when the thickness is guaranteed, the layer and overall strength of the road surface can be guaranteed, and it also has a certain control effect on the elevation of the road surface. If the surface layer is not thick enough, cracks will appear in the road surface in a short time. As water penetrates into the cracks, the road surface strength will decrease significantly, resulting in road surface diseases such as potholes and peeling, accelerating the destruction of the asphalt pavement surface layer and shortening the service life of the road surface.

[0003] The traditional method for measuring the temperature and thickness of asphalt mixture paving is manual. For example, a temperature and thickness detection device for paving asphalt disclosed in announcement number CN215810972 U detects the insertion displacement of a rod inserted into the bottom of the asphalt mixture through a rangefinder to detect the thickness of the asphalt mixture. When measuring, since the device directly measures the displacement of the rod, it is necessary to ensure that the bottom end of the rod and the bottom wall of the base are in the same plane, and the asphalt mixture needs to be flat. If the surface of the asphalt mixture layer is uneven or the rod is worn after reciprocating use, resulting in a gap between the bottom end of the rod and the bottom wall of the base, it will affect the accuracy of the asphalt mixture thickness detection.

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

[0005] In view of this, an object of the present invention is to provide a detection device for measuring the paving temperature and thickness of asphalt mixture, so as to solve the problem of low thickness measurement accuracy caused by the flatness 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] In order to achieve the above object, the present invention provides the following technical solutions: The present invention provides a detection device for measuring the paving temperature and thickness of asphalt mixture, comprising a positioning frame, a sliding rod slidably installed in the positioning frame, a display panel with a processor installed on the top of the sliding rod, an insertion rod slidably installed in the sliding rod, a sliding groove for sliding the insertion rod and a limiting groove connected to the sliding groove are provided in the sliding rod, a limiting plate for limiting sliding in the limiting groove is provided on the top of the insertion 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 on the top of the sliding rod, a temperature sensor is installed on the bottom end of the insertion rod, and the pressure sensor is used to transmit the detected pressure signal to the processor to open or close the rangefinder.

[0007] Furthermore, at least two positioning blocks are installed on the positioning frame, and the slide bars are slidably installed on the positioning blocks. The slide bars on adjacent positioning blocks are connected by connecting rods, and pressing down the connecting rods can make multiple slide bars move synchronously.

[0008] Furthermore, the positioning frame is provided with a slide rail arranged in a 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.

[0009] Furthermore, 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 capable of contacting 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.

[0010] Furthermore, a plurality of positioning holes are provided on the slide rail, and a latch that cooperates 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 cooperating with the positioning holes.

[0011] Furthermore, a support plate is detachably mounted on 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 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.

[0012] Furthermore, the cross section of the positioning frame is rectangular, a support rod is slidably mounted on the bottom end of the positioning frame, a support seat is mounted on the bottom end of the support rod, and the cross section area of ​​the support seat is larger than the cross section area of ​​the support rod.

[0013] The beneficial effects of the present invention are: The present invention provides a limit groove and a pressure sensor so that the distance measurement work starts only after the insertion rod contacts the surface of the asphalt mixture, thereby ensuring the accuracy of the asphalt mixture thickness measurement. The positioning frame can be placed in a position that does not contact the asphalt mixture surface, and the sliding rod is limited to ensure the verticality of the sliding rod and the insertion rod during the sliding process.

[0014] Other advantages, objectives and features of the present invention will be described in the following description and will be apparent to those skilled in the art to some extent, or those skilled in the art may be taught from the practice of the present invention. The objectives and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to make the purpose, technical solution and beneficial effects of the present invention clearer, the present invention provides the following drawings for illustration: Figure 1 A cross-sectional view of the structure of the slide rod and the insertion rod in cooperation with each other according to an embodiment of the present invention; Figure 2 For the embodiment of the present invention Figure 1 A magnified view of the part A in the middle; Figure 3 It is a schematic diagram of the overall structure of an embodiment of the present invention.

[0016] The markings in the accompanying drawings are as follows: positioning frame 1, positioning block 101, slide rail 102, positioning hole 103, latch pin 104, sleeve 105, fixing plate 106, ball bearing 107, slide rod 2, slide groove 201, limiting groove 202, strip groove 203, insertion rod 3, limiting plate 301, pressure sensor 4, rangefinder 5, connecting rod 6, support plate 7, notch 701, support rod 8, support seat 9. DETAILED DESCRIPTION

[0017] like Figure 1~Figure 3 As shown, 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 on the top of the sliding rod 2, an insertion rod 3 is limitedly slidably installed in the sliding rod 2, a sliding groove 201 and a limiting groove 202 connected to the sliding groove 201 are provided in the sliding rod 2, a limiting plate 301 is provided on the insertion rod 3, the limiting plate 301 is slidably installed in the limiting plate 301, the insertion rod 3 is slidably installed in the sliding groove 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 on the top of the sliding rod 2, a temperature sensor is installed on the bottom end of the insertion rod 3, and the pressure sensor 4 is used to transmit the detected pressure signal to the processor to open or close the rangefinder 5.

[0018] In the present scheme, when the device is used 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 actual operation to ensure the stability of the positioning frame 1 during detection. In the initial state before detection, a gap is provided between the bottom end of the insertion rod 3 and the surface of the asphalt mixture. During detection, the slide bar 2 is pressed to move the slide bar 2 on the positioning frame 1 toward the asphalt surface. At this time, the limit plate 301 on the insertion rod 3 contacts the bottom wall of the limit groove 202 under its own weight. The slide bar 2 drives the insertion rod 3 to move synchronously during the movement. When the bottom end of the insertion rod 3 contacts the surface of the asphalt mixture, continuing to move the slide bar 2 can cause the limit plate 301 on the insertion rod 3 to move toward the top wall of the limit groove 202. Move forward until the limit plate 301 contacts the top wall of the limit groove 202, continue to press down the slide bar 2 to enable the pressure sensor 4 to sense the pressure signal, at this time the pressure sensor 4 transmits the pressure signal to the processor, and the processor controls the rangefinder 5 to turn on, at this time the distance between the top of the slide bar 2 and the top of the positioning frame 1 detected by the rangefinder 5 is the initial distance, and is displayed as 0 on the display panel, and then continue to press down the slide bar 2 to allow the slide bar 2 to drive the insertion rod 3 to be inserted into the asphalt mixture. During the insertion process, the rangefinder 5 can detect the change in the distance between the top of the slide bar 2 and the top of the positioning frame 1 in real time until the insertion 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, and after the insertion rod 3 is inserted into the bottom, the measured temperature is displayed on the display panel through the temperature sensor.

[0019] In this solution, by setting the limit groove 202 and the pressure sensor 4, the distance measurement work is not started until the insertion rod 3 contacts the surface of the asphalt mixture, thereby ensuring the accuracy of the asphalt mixture thickness measurement, and the positioning frame 1 can be placed in a position where it does not contact the surface of the asphalt mixture, and ensure the limitation of the sliding rod 2 to ensure the verticality of the sliding rod 2 and the insertion rod 3 during the sliding process.

[0020] In one embodiment of the present invention, at least two positioning blocks 101 are installed on the positioning frame 1, and the sliding rod 2 is slidably installed on the positioning block 101. The sliding rods 2 on multiple positioning blocks 101 are connected by a connecting rod 6. Pressing down the connecting rod 6 can make the multiple sliding rods 2 move synchronously.

[0021] In the present solution, the slide bar 2 can slide on the positioning block 101 along the axis direction of the slide bar 2. By setting more than two positioning blocks 101, the thickness at different positions on the asphalt mixture can be measured simultaneously, and by setting the connecting rod 6, pressing down the connecting rod 6 can make multiple slide bars 2 move synchronously. Due to the setting of the limit groove 202 and the pressure sensor 4, when the connecting rod 6 is pressed down, the rangefinders 5 on different slide bars 2 measure the distance respectively, and the average of the asphalt mixture thickness measured by the rangefinders 5 on multiple slide bars 2 is calculated to improve the measurement accuracy of the asphalt mixture thickness. If the difference in thickness measured by multiple rangefinders 5 is too large, it can be judged that the flatness of the asphalt mixture surface is low.

[0022] In one embodiment of the present invention, the positioning frame 1 is provided with a slide rail 102 arranged in a horizontal direction, the positioning block 101 is slidably installed on the slide rail 102, the slide rod 2 is sleeved on the connecting rod 6 and can slide along the slide rod 2, and the slide rod is arranged parallel to the slide rail.

[0023] 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 interval when measuring different insertion rods 3.

[0024] In one 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, and the insertion rod 3 is located in 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 fixing plate 106 close to the side of the insertion rod 3, and the sliding rod 2 is provided with a strip groove 203 corresponding to the plurality of fixing plates 106 one by one.

[0025] In the present solution, the fixed plate 106 and the ball 107 are provided to limit the insertion rod 3, so as to ensure the stability of the insertion rod 3 during movement, and to avoid deformation of the insertion rod 3 due to lack of limitation of the insertion rod 3 when squeezing the slide bar 2 for the loose asphalt mixture with a small loose laying coefficient; a strip groove 203 is provided at a position corresponding to the fixed plate 106 on the slide bar 2, so that when the slide bar 2 slides, the slide bar 2 can slide down along the insertion rod 3; the ball 107 is provided to reduce the friction between the insertion rod 3 and the fixed plate 106, so as to avoid the movement of the limiting plate 301 in the limiting groove 202 due to the friction before the insertion rod 3 contacts the surface of the asphalt mixture.

[0026] In one embodiment of the present invention, a plurality of positioning holes 103 are provided on the slide rail 102, and a latch 104 cooperating 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 cooperating with the latch 104 and the positioning hole 103 to ensure the stability of the sliding rod 2 during the sliding process.

[0027] In one embodiment of the present invention, a support plate 7 is detachably mounted on 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, and a notch 701 is provided on the support plate 7 for the insertion rod 3 to pass through, and the support plate 7 is used to be placed on the surface of the asphalt mixture.

[0028] In this solution, the positioning frame 1 and the support plate 7 are detachably connected by bolts. By setting 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 verticality of the moving slide rod 2 is ensured when the detection device is placed on the surface of the asphalt mixture.

[0029] In one embodiment of the present invention, the cross-section of the positioning frame 1 is rectangular, 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, and the cross-sectional area of ​​the support seat 9 is larger than the cross-sectional area of ​​the support rod 8.

[0030] In the present solution, by setting a support rod 8 and a support seat 9, sliding the support rod 8 to a preset position and then fixing it, the distance between the positioning frame 1 and the surface of the asphalt mixture can be adjusted, so that 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 slope of the road surface; when the positioning frame 1 is placed on the surface of the asphalt mixture, the support seat 9 is fixed to the support plate 7 by bolts, so that the support plate 7 is placed on the surface of the asphalt mixture.

[0031] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. 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 sliding rod is slidably installed in the positioning frame, a display panel with a processor is installed on the top of the sliding rod, an insertion rod is installed in the sliding rod for limited sliding, a sliding groove for sliding the insertion rod and a limiting groove connected to the sliding groove are provided in the sliding rod, a limiting plate for limited sliding in the limiting groove is provided on the top of the insertion 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 on the top of the sliding rod, a temperature sensor is installed on the bottom end of the insertion rod, and the pressure sensor is used to use the detected pressure signal to open or close the rangefinder through the processor; 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 connecting rods, and pressing down the connecting rod can make multiple sliding rods move synchronously.

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.

5. The detection device for measuring the temperature and thickness of asphalt mixture paving according to claim 4 is characterized in that: A support plate is detachably mounted on the bottom end of the positioning frame. The cross-sectional area of ​​the support plate is larger than that of the positioning frame. A notch is provided on the support plate for the insertion rod to pass through. The support plate is used to be placed on the surface of the asphalt mixture.

6. The detection device for measuring the temperature and thickness of asphalt mixture paving according to claim 5 is characterized in that: The cross section of the positioning frame is rectangular, a support rod is slidably mounted at the bottom end of the positioning frame, a support seat is mounted at the bottom end of the support rod, and the cross section area of ​​the support seat is larger than the cross section area of ​​the support rod.

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