A comprehensive testing device for asphalt performance

Abstract

The present invention discloses a comprehensive asphalt performance detection device, which relates to the field of asphalt detection equipment, and includes a test bench, the test bench is provided with a water tank for storing constant temperature water, the water tank is provided with a driving member for stretching asphalt samples, the water tank is provided with a lifting support plate, the upper end of the support plate is slidably connected with a moving block, and a positioning block corresponding to the moving block is fixedly provided, the positioning block and the upper end of the moving block are both provided with a forming groove, the positioning block and the moving block are detachably connected with a limiting block, the limiting block cooperates with the inner wall of the forming groove to limit the shape of the asphalt sample, the water tank is provided with a moving seat, the driving member is used to drive the moving seat to move, a connecting member is provided between the moving seat and the moving block, the moving seat drives the moving block to move through the connecting member, the moving block is fixed with a pointer, and the water tank is provided with a ruler adapted to the pointer. The present application has the effect of improving the measurement accuracy of asphalt elongation.

Description

Technical Field

[0001] The invention relates to the field of asphalt testing equipment, and in particular to an asphalt performance comprehensive testing device. Background Art

[0002] The elongation of asphalt is one of the important indicators of asphalt performance. When testing the elongation of asphalt, it is necessary to use a special sample mold to make an "8"-shaped asphalt sample. After the sample is made, it is necessary to use a special testing mechanism to drive the two ends of the asphalt sample away from each other through a clamping mechanism, and then measure the tensile length of the asphalt sample when it breaks.

[0003] For related technologies, please refer to the Chinese patent with announcement number CN218350023U, which discloses a low-temperature asphalt elongation tester, which relates to the field of asphalt testing and is used to improve the problem of low testing efficiency of the current low-temperature asphalt elongation tester. It includes a water tank, a partition is fixedly connected to one side of the inside of the water tank, a screw is rotatably connected to the inside of the partition, one end of the screw is rotatably connected to the inner wall of the water tank, the other end of the water tank is fixedly connected to a stepper motor, the stepper motor is fixedly connected to the water tank, and the outer side of the screw is rotatably connected to a fixed seat. The device is provided with a limit column, a slot and an oil cylinder, so that when the oil cylinder is started, the two sets of mounting seats and metal columns can be driven up and down by the traction block and the upper guide rod, so that the metal column can be moved upward to extend out of the water tank during testing, so as to facilitate the installation of the low-temperature asphalt test block and the end mold for fixing the low-temperature asphalt test block, thereby improving the efficiency of the asphalt elongation test.

[0004] Regarding the above-mentioned related technologies, the detection of asphalt elongation mainly utilizes the cooperation of the measuring identification rod and the ruler, and measures the length of the relative displacement between the fixed seat and the moving seat to determine the elongation of the asphalt sample. The fixed seat and the moving seat both fix the two extension plates through metal columns, and the extension plates are provided with sockets for connecting the metal columns. In order to improve the accuracy of the measurement results and reduce the probability of relative displacement between the top plate and the moving plate and the corresponding extension plates, the metal column is usually adapted to the inner diameter of the socket, and when the metal column is inserted into the corresponding socket, it fits with the inner wall of the socket. However, under long-term working conditions, when the extension mold is repeatedly installed, the outer circle of the metal column and the inner wall of the socket are easily deformed due to wear, which causes a gap between the metal column and the inner wall of the socket, resulting in the extension plate shaking with the movement of the moving seat when the moving seat moves, thereby affecting the measurement accuracy of the asphalt elongation. Summary of the invention

[0005] In order to improve the measurement accuracy of asphalt elongation, the present application provides an asphalt performance comprehensive detection device.

[0006] The present application provides a comprehensive asphalt performance detection device, which adopts the following technical solution:

[0007] A comprehensive asphalt performance detection device comprises a test bench, wherein a water tank is provided at the upper end of the test bench, constant temperature water circulates in the water tank, and a driving member for stretching the asphalt sample is provided in the water tank, a liftable support plate is horizontally arranged in the water tank, a moving block is slidably connected to the upper end of the support plate along the length direction, and a positioning block flush with the moving block is provided on the support plate, the moving block approaches or moves away from the positioning block when moving, a forming groove is provided on the upper end of the positioning block and the moving block, a limit block is provided between the positioning block and the moving block, the limit block and the positioning block and the moving block are detachably connected, the limit block cooperates with the inner wall of the forming groove to limit the shape of the asphalt sample, a moving seat is slidably connected to the water tank along the length direction, the driving member is used to drive the moving seat to move, a connecting member is provided between the moving seat and the moving block, and the moving seat drives the moving block to move through the connecting member when moving along the length direction of the water tank, a pointer is fixedly provided on the upper end of the moving block, and a scale adapted to the pointer is fixedly provided on the water tank along the length direction.

[0008] By adopting the above technical solution, initially, the support plate is above the water surface of the constant temperature water in the water tank, at which time the moving block and the positioning block are interconnected, and the limit block is installed in the forming tank. Liquid asphalt is poured into the forming tank, and when the asphalt solidifies at room temperature to form an asphalt sample, the support plate is manipulated to move downward so that the asphalt sample sinks into the constant temperature water for constant temperature treatment. After the constant temperature treatment is completed, the two limit blocks are removed, the support table is manipulated to move to an appropriate height, and the moving seat is driven to move by the driving member, and the moving seat drives the moving block to move through the connecting member. When the moving block moves, the asphalt sample is stretched through the limiting effect of the forming tank, and the pointer is driven to move when the moving block moves. When the asphalt sample breaks, the moving distance of the pointer along the ruler is recorded, and the elongation of the asphalt sample is obtained through multiple tests. The pointer is directly connected to the moving block, and the relative displacement between the moving seat and the moving block is not easy to interfere with the movement of the pointer, which is conducive to improving the accuracy of the measurement results.

[0009] Optionally, the support plate is slidably connected to a scraper plate along the length direction, the scraper plate is at the upper end of the positioning block, and the lower end of the scraper plate is flush with the positioning block, the scraper plate is fixed with blade portions for scraping asphalt on both sides along the length direction of the water tank, and the upper end of the scraper plate is provided with a accommodating groove along the length direction of the blade portion.

[0010] By adopting the above technical solution, when the forming groove is filled with liquid asphalt, the scraper plate is moved along the length direction of the movable seat, so that the scraper plate cleans the overflowed asphalt through the blade part, and the excess asphalt falls into the receiving groove along the blade part, thereby facilitating the collection and cleaning of the excess asphalt.

[0011] Optionally, the forming groove vertically penetrates the positioning block and the moving block, and a placement groove is provided at the upper end of the support plate, and a bottom plate is provided in the placement groove. The bottom plate is directly below the positioning block and is slidably connected to the support plate horizontally. The support plate is provided with a guide groove along the sliding direction of the bottom plate, and a guide column adapted for the guide groove is fixed to the bottom plate. The guide column is inserted in the guide groove and is slidably connected to the support plate along the length direction of the guide groove. A moving ring is fixed to the lower end of the bottom plate, and a driving column is vertically slidably connected to the moving ring. The support plate is rotatably connected to a threaded column along the horizontal direction, and the threaded column passes through the support column and is threadedly connected to the support column. When the guide column is in the middle position of the guide groove, the upper end surface of the bottom plate contacts the lower end surface of the positioning block. When the guide column moves toward the end of the guide groove, the bottom plate gradually moves away from the positioning block.

[0012] By adopting the above technical solution, initially, the guide column is in the middle of the guide groove, and the guide groove supports the bottom plate through the guide column. At this time, the bottom plate contacts the positioning block and the moving block and blocks the forming groove. When the elongation needs to be measured, the threaded column is rotated so that the threaded column pushes the support column to move along the guide groove. When the support column moves, the bottom plate is driven to move along the width direction of the asphalt sample through the moving ring, thereby separating the bottom plate from the asphalt sample. When the guide column is close to the end of the guide groove, the bottom plate is away from the asphalt sample and sinks into the placement groove, thereby facilitating the probability that the lower end surface of the asphalt sample sticks to any component and affects the accuracy of the detection.

[0013] Optionally, the limit block includes a mounting block and a molding block, one side of the molding block is in the molding groove and cooperates with the inner wall of the molding groove to limit the shape of the asphalt sample, the positioning block and the movable block are both provided with a fixed groove, the mounting block is in the fixed groove and fits with the molding block, the positioning block and the fixed block are both fixed with a positioning shaft, the positioning shaft passes through the corresponding positioning block or the fixed block, and is inserted in the mounting block, the mounting block is slidably connected to the molding block along the vertical direction, and an elastic member is provided between the mounting block and the molding block, the elastic member is used to drive the molding block to fit with the base plate.

[0014] By adopting the above technical solution, initially, the positioning block and the moving block both position the limit block through the positioning shaft, at which time the installation block is in the fixed groove and fits with the inner wall of the fixed groove, and one side of the forming block is in the fixed groove, and the other side is in the forming groove, and the forming block fits with the bottom plate under the action of the elastic member, thereby reducing the probability of asphalt entering between the limit block and the bottom plate. When the limit block needs to be removed, the positioning shaft is disassembled to release the positioning of the installation block, and the bottom plate is moved so that the bottom plate is away from the limit block along the guide groove, and the limit block is pressed so that the limit block is relatively displaced with the asphalt sample in the vertical direction, so that the asphalt sample is separated from the limit block, thereby improving the convenience of splitting the limit block.

[0015] Optionally, the connecting member includes a sliding rod and an open ring, the sliding rod is located on the side of the moving seat close to the support plate and is arranged vertically, the open ring is located on the side of the sliding rod away from the moving seat, and is slidingly connected to the sliding rod along the axis direction of the sliding rod, and the side of the open ring away from the sliding rod is connected to the moving block, and when the sliding rod moves, the moving block is driven to move through the open ring.

[0016] By adopting the above technical solution, initially, the moving seat is located in the position of the water tank close to the support plate. When the moving seat moves, it drives the slide rod to move. When the moving block rises and falls vertically with the support plate, the moving block drives the open ring to move along the slide rod. When the asphalt sample needs to be stretched, the driving member drives the moving seat away from the support plate, and then the cooperation of the slide rod and the open ring drives the moving block to separate from the positioning block.

[0017] Optionally, baffles are provided on both sides of the support plate along the length direction, and the baffles are slidably connected to the support plate vertically. A drain outlet connected to the placement groove is opened at the lower end of the support plate, and a filter box adapted to the drain outlet is detachably connected to the lower end of the support plate, and a filter net is arranged in the filter box.

[0018] By adopting the above technical solution, when removing or installing the limit block, the two baffles are both under the positioning block. When measuring the elongation of the asphalt sample, the two baffles are moved upward so that the two baffles cooperate to block the gap between the positioning block and the moving block. When the asphalt sample is broken, debris is easily generated, and the debris enters the placement groove under the action of gravity. After the support plate is reset, the support plate is driven to move up. When the filter box is higher than the water surface in the water tank, the water in the placement groove enters the filter box along the drain outlet and is discharged through the filter net. At this time, the water in the placement groove moves, driving the debris generated when the asphalt is broken, thereby facilitating the collection of the debris, which is beneficial to reduce the probability of debris entering the water tank.

[0019] Optionally, the test bench is also provided with a support frame, a measuring scale and a standard needle. The support frame is arranged at the upper end of the test bench, and the upper end of the support frame is connected to a mounting frame along a transverse rotation. The measuring scale is fixedly connected to the upper end of the mounting frame, and the standard needle is fixedly connected to the lower end of the mounting frame and is located directly below the measuring scale. The measuring scale is used to measure the vertical displacement of the standard needle. The mounting frame is provided with a positioning piece for limiting the vertical displacement of the standard needle. When the measuring scale is directly above the fixed plate, the standard needle is directly opposite to the forming groove of the positioning block.

[0020] By adopting the above technical solution, before measuring the elongation of the asphalt sample, the mounting frame is rotated so that the mounting frame drives the measuring table and the standard needle to move to the top of the positioning block. At this time, the standard needle is facing the asphalt sample in the molding groove of the positioning block. The standard needle is moved vertically so that the lower end of the standard needle contacts the asphalt sample, and the standard needle is positioned by the positioning piece. At this time, the moving distance of the standard needle is recorded by the measuring table. After the recording is completed, the restriction of the positioning piece on the standard needle is released, so that the standard needle is inserted into the asphalt sample under the action of its own gravity. After the standard time, the standard needle is positioned again by the positioning piece, and the displacement of the standard needle is measured again by the measuring table. By comparing the two displacement lengths of the measuring table, the needle penetration of the asphalt sample is detected. By testing different properties with the same asphalt sample, there is no need for additional testing, which is conducive to improving the convenience of testing the comprehensive performance of asphalt sample performance.

[0021] Optionally, the support frame is slidably connected to the test bench vertically, a drive block is fixed on one side of the support frame, the test bench is rotatably connected with a lead screw, the lead screw is vertically arranged and passes through the drive block and is threadedly connected to the drive block, and the lower end of the mounting frame is rotatably connected with a positioning plate horizontally, and when the lead screw rotates a standard arc, the distance the support frame moves vertically is consistent with the positioning plate.

[0022] By adopting the above technical solution, initially, when the standard needle is directly above the asphalt sample, the positioning plate is moved between the standard needle and the asphalt sample, and the lead screw is rotated at this time, so that the lead screw drives the mounting frame to move along the height direction of the support frame through the driving block, so that the lower end surface of the positioning plate is in contact with the asphalt sample. When recording the first displacement of the standard needle, the standard needle is directly contacted with the positioning plate. After the standard needle is positioned, the positioning plate is rotated, and the lead screw is rotated a standard distance again, so that the standard needle drops the distance of the thickness of the positioning plate. At this time, the lower end of the standard needle is in contact with the asphalt sample, which is beneficial to reduce the probability that the standard needle is inserted into the asphalt sample during the first displacement, affecting the final measurement result.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. Initially, the support plate is above the surface of the constant temperature water in the water tank. At this time, the moving block and the positioning block are interconnected, and the limit block is installed in the molding tank. Pour liquid asphalt into the molding tank. When the asphalt solidifies at room temperature to form an asphalt sample, the support plate is manipulated to move downward so that the asphalt sample sinks into the constant temperature water for constant temperature treatment. After the constant temperature treatment is completed, the two limit blocks are removed, the support table is manipulated to move to an appropriate height, and the moving seat is driven to move by the driving member. The moving seat drives the moving block to move through the connecting member. When the moving block moves, the asphalt sample is stretched through the limiting effect of the molding tank. When the moving block moves, it drives the pointer to move. When the asphalt sample breaks, the moving distance of the pointer along the scale is recorded. After multiple tests, the elongation of the asphalt sample is obtained. The pointer is directly connected to the moving block, and the relative displacement between the moving seat and the moving block is not easy to interfere with the movement of the pointer, which is conducive to improving the accuracy of the measurement results;

[0025] 2. Initially, the guide column is in the middle of the guide groove, and the guide groove supports the bottom plate through the guide column. At this time, the bottom plate contacts the positioning block and the moving block and blocks the forming groove. When the elongation needs to be measured, the threaded column is rotated so that the threaded column pushes the support column to move along the guide groove. When the support column moves, the bottom plate is driven to move along the width direction of the asphalt sample through the moving ring, thereby separating the bottom plate from the asphalt sample. When the guide column is close to the end of the guide groove, the bottom plate is away from the asphalt sample and sinks into the placement groove, thereby reducing the probability that the lower end surface of the asphalt sample will stick to any component and affect the accuracy of the detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of Example 1.

[0027] Figure 2 It is a schematic diagram intended to highlight the connection between the support plate and the filter box.

[0028] Figure 3 It is a schematic diagram intended to highlight the positions of the positioning block and the moving block.

[0029] Figure 4 It is a schematic diagram intended to highlight the internal structure of the support plate.

[0030] Figure 5 It is a schematic diagram intended to highlight the structure of the mounting block and the forming block.

[0031] Figure 6 It is a schematic diagram of the overall structure of Example 2.

[0032] Figure 7 yes Figure 6 Enlarged schematic diagram of part A.

[0033] Description of reference numerals: 1. test bench; 11. lifting screw; 111. lifting motor; 12. lead screw; 2. water tank; 21. support plate; 211. placement groove; 212. guide groove; 213. drain outlet; 214. filter box; 215. filter screen; 216. baffle; 22. moving block; 221. forming groove; 222. fixing groove; 223. pointer; 23. positioning block; 24. limiting block; 241. mounting block; 242. forming block; 243. elastic member; 244. positioning shaft; 25. moving seat; 26 , connecting part; 261, sliding rod; 262, open ring; 27, ruler; 28, scraper plate; 281, blade; 282, receiving groove; 29, bottom plate; 291, guide column; 292, moving ring; 293, driving column; 294, threaded column; 3, driving part; 4, measuring part; 41, supporting frame; 411, mounting frame; 412, driving block; 413, positioning part; 414, positioning plate; 42, measuring meter; 421, housing; 422, dial; 423, needle; 424, measuring rod; 43, standard needle. DETAILED DESCRIPTION

[0034] The present application is further described in detail below in conjunction with all the accompanying drawings.

[0035] The embodiment of the present application discloses a device for comprehensive detection of asphalt properties.

[0036] Embodiment 1:

[0037] Reference Figure 1 and Figure 2 A comprehensive asphalt performance testing device includes a test bench 1, a water tank 2 is fixedly connected to the upper end of the test bench 1, the water tank 2 is horizontally arranged, and constant temperature water is placed in the water tank 2. A circulation device is installed at the lower end of the test bench 1, and the circulation device is used to drive the constant temperature water in the water tank 2 to circulate. The circulation device is a prior art, so it is not described in detail here.

[0038] Reference Figure 1 and Figure 3 A support plate 21 is horizontally arranged at one end of the water tank 2, and the support plate 21 is slidably connected to the water tank 2 in the vertical direction. The water tank 2 is provided with a lifting motor 111 for driving the support plate 21 to move. A lifting screw 11 is vertically arranged in the water tank 2, and the lifting screw 11 is rotatably connected to the water tank 2. The lifting motor 111 is used to drive the lifting screw 11 to rotate. A connecting block is fixedly connected to the lower end of the support plate 21, and the lifting screw 11 passes through the connecting block and is threadedly connected to the connecting block. When the lifting screw 11 rotates, it drives the support plate 21 to rise or fall through the connecting block.

[0039] Reference Figure 1 and Figure 3A positioning block 23 and a moving block 22 are provided at the upper end of the support plate 21. The positioning block 23 and the moving block 22 are arranged along the length direction of the water tank 2. The positioning block 23 is fixedly connected to the side of the support plate 21 close to the lifting motor 111. The moving block 22 is slidably connected to the support plate 21 along the length direction of the water tank 2. When the support plate 21 moves, the moving block 22 is driven to move synchronously. Two limit blocks 24 are provided between the positioning block 23 and the moving block 22. The two limit blocks 24 are distributed along the width direction of the water tank 2.

[0040] Reference Figure 3 and Figure 4 The positioning block 23 and the moving block 22 are provided with a forming groove 221 in the vertical direction, the support plate 21 is provided with a placement groove 211 connected with the forming groove 221, and a bottom plate 29 is provided in the placement groove 211. The bottom plate 29 is arranged horizontally and is slidably connected with the support plate 21 in the horizontal direction. The support plate 21 is provided with a guide groove 212 connected with the placement groove 211 along the moving direction of the bottom plate 29, and the guide groove 212 includes an upper transverse groove, two lower transverse grooves and two inclined grooves. The upper transverse groove is arranged horizontally, and the two lower transverse grooves are respectively located at the two ends of the upper transverse groove and are both located below the upper transverse groove. The inclined groove is connected between the upper transverse groove and the lower transverse groove, and is inclinedly arranged from top to bottom along the direction from the upper transverse groove to the lower transverse groove.

[0041] Reference Figure 3 and Figure 4 The bottom plate 29 is fixedly connected with a guide column 291, the cross section of which is circular, and the guide column 291 is inserted into the guide groove 212 and is slidably connected with the support plate 21 along the length direction of the guide groove 212. When the guide column 291 is in the upper transverse groove, the upper end surface of the bottom plate 29 is in contact with the lower end surface of the positioning block 23. A moving ring 292 is fixed to the lower end of the bottom plate 29, and a driving column 293 is vertically slidably connected in the moving ring 292, and the driving column 293 is slidably connected with the support plate 21 along the length direction of the upper transverse groove.

[0042] Reference Figure 3 and Figure 4 The support plate 21 is connected with a threaded column 294 for rotation along the length direction of the upper transverse groove, and the threaded column 294 passes through the driving column 293 and is threadedly connected with the driving column 293. Under the action of the support plate 21, when the threaded column 294 is rotated, the threaded column 294 drives the driving column 293 to move along the length direction of the guide groove 212. When the driving column 293 moves, it drives the bottom plate 29 to move through the cooperation with the moving ring 292, and then the bottom plate 29 drives the guide column 291 to move along the guide groove 212.

[0043] Reference Figure 3 and Figure 5The limit block 24 includes a mounting block 241 and a forming block 242. A fixed groove 222 connected to the forming groove 221 is provided on the side where the positioning block 23 and the moving block 22 are close to each other. When the positioning block 23 conflicts with the moving block 22, the two fixed grooves 222 on the same side are connected. The mounting block 241 and the forming block 242 fit each other and are connected by vertical sliding. When the mounting block 241 is in the two fixed grooves 222 connected to each other, one side of the forming block 242 is in the fixed groove 222, and the other side passes through the fixed groove 222 and extends to the forming groove 221. The side of the forming block 242 in the forming groove 221 intersects with the inner wall of the forming groove 221.

[0044] Reference Figure 3 and Figure 5 An elastic member 243 is provided between the forming block 242 and the mounting block 241. The elastic member 243 is a spring. One end of the spring is fixedly connected to the forming block 242, and the other end is fixedly connected to the mounting block 241. When the mounting block 241 is in the fixing groove 222, the elastic ring pushes the forming block 242 to fit with the bottom plate 29. Both the positioning block 23 and the moving block 22 are provided with a positioning shaft 244. The positioning shaft 244 passes through the corresponding moving block 22 or the positioning block 23 in the horizontal direction and is inserted into the mounting block 241. The positioning block 23 and the moving block 22 limit the mounting block 241 through the positioning shaft 244.

[0045] Reference Figure 1 and Figure 3 The water tank 2 is slidably connected with a moving seat 25 along the length direction. The water tank 2 is provided with a driving member 3 for driving the moving seat 25 to move. The driving member 3 can be a cylinder, a hydraulic cylinder, or a combination of a motor and a threaded rod. In this embodiment, the driving member 3 is a motor and a threaded rod. The threaded rod is arranged along the length direction of the water tank 2 and is rotatably connected to the water tank 2. The motor is fixedly connected to the water tank 2 and is used to drive the threaded rod to rotate. The threaded rod passes through the moving seat 25 and is threadedly connected to the moving seat 25. Under the limiting effect of the water tank 2, when the threaded rod rotates, it drives the moving seat 25 to move along the length direction of the water tank 2.

[0046] Reference Figure 1 and Figure 3 A connecting piece 26 is provided between the movable seat 25 and the movable block 22, and the connecting piece 26 includes a sliding rod 261 and an open ring 262. The sliding rod 261 is vertically fixed to one side of the movable seat 25 close to the support plate 21. When the movable seat 25 moves, the sliding rod 261 is driven to move. The inner diameter of the open ring 262 is adapted to the cross-section of the sliding rod 261, and a notch is provided on one side of the open ring 262. The open ring 262 is sleeved on the outer side of the sliding rod 261 and is slidably connected to the sliding rod 261 along the length direction of the sliding rod 261. When the open ring 262 moves, the notch is used to avoid the connection between the sliding rod 261 and the movable seat 25, and the sliding rod 261 drives the open ring 262 to move.

[0047] Reference Figure 1 and Figure 3 , the side of the moving block 22 away from the positioning block 23 is fixedly connected to the open ring 262, and when the open ring 262 moves, the moving block 22 is driven to move. Initially, the support plate 21 is driven to move vertically by the lifting motor 111, so that the support plate 21 drives the positioning block 23 and the moving block 22 to rise above the horizontal plane of the constant temperature water in the water tank 2. Liquid asphalt is poured into the forming tank 221, so that the asphalt forms a standard asphalt sample under the limiting effect of the inner wall of the forming tank 221, the bottom plate 29 and the side of the forming block 242.

[0048] Reference Figure 1 and Figure 3 The support plate 21 is slidably connected with a scraping plate 28 along the length direction. The scraping plate 28 is located above the positioning block 23 and the moving block 22. When the scraping plate 28 moves, it passes through the positioning block 23 and the moving block 22 in sequence. The scraping plate 28 is fixed with a blade portion 281 on both sides along the length direction of the water tank 2. The thickness of the blade portion 281 gradually decreases in the direction away from the scraping plate 28. When the scraping plate 28 moves along the length direction of the support plate 21, it drives the blade portion 281 to move. The upper end surfaces of the positioning block 23, the moving block 22 and the forming block 242 are flush.

[0049] Reference Figure 1 and Figure 3 When pouring liquid asphalt into the forming groove 221, in order to ensure that the asphalt is fully filled in the forming groove 221, a sufficient amount of asphalt needs to be poured into the forming groove 221, so some asphalt is likely to overflow, and the lower end of the blade portion 281 contacts the upper end of the positioning block 23, and then when the scraping plate 28 moves, the excess asphalt outside the forming groove 221 is scraped by the blade portion 281. A receiving groove 282 is provided at the upper end of the scraping plate 28 near the blade portion 281, and the receiving groove 282 is arranged along the length direction of the scraping plate 28. When the blade portion 281 scrapes excess asphalt, the asphalt enters the receiving groove 282 along the blade portion 281, thereby reducing the probability of the scraped asphalt scattering.

[0050] Reference Figure 3 and Figure 4 After the asphalt is leveled, the asphalt sample is left to stand to solidify and form at the standard temperature. The asphalt sample between the two forming blocks 242 is the test site. At this time, the asphalt in the receiving groove 282 is cleaned, and the support plate 21 is manipulated to move downward so that the asphalt sample is immersed in constant temperature water for immersion. After the immersion treatment reaches the required time, the support plate 21 is manipulated to move upward, and the threaded column 294 is rotated so that the bottom plate 29 drives the guide column 291 to move along the upper transverse groove. When the bottom plate 29 moves, it produces relative displacement with the asphalt sample, so that the bottom plate 29 is separated from the asphalt sample. When the guide column 291 moves along any inclined groove to the lower transverse groove, the bottom plate 29 moves downward and away from the asphalt sample.

[0051] Reference Figure 1 and Figure 3 , press the forming block 242 in the avoidance direction of the bottom plate 29, so that the forming block 242 is relatively displaced with the asphalt sample in the vertical direction, and then the forming block 242 is separated from the asphalt sample. After removing the positioning shaft 244, the limit of the mounting block 241 is released, and the mounting block 241 and the forming block 242 are moved out of the fixing groove 222. After the support plate 21 is moved to an appropriate height, the driving member 3 is controlled to drive the moving seat 25 away from the support plate 21. When the moving seat 25 moves, the sliding rod 261 and the open ring 262 apply a pulling force to the moving seat 25. The moving seat 25 limits the end of the asphalt sample through the forming groove 221, so that the test part of the asphalt sample is stretched.

[0052] Reference Figure 1 and Figure 3 , a pointer 223 is fixed on the upper end of the moving block 22. When the moving block 22 moves, the pointer 223 is driven to move. A scale 27 corresponding to the pointer 223 is fixed along the length direction of the water tank 2. When the moving block 22 moves along the length direction of the water tank 2, the pointer 223 is driven to move along the scale 27. Initially, before the driving member 3 drives the moving seat 25 to move, the position of the pointer 223 at the scale 27 is recorded. This position is recorded as distance one. When the moving block 22 moves and drives the test part of the asphalt sample to stretch, when the test part breaks, the position of the pointer 223 is recorded as distance two. The value of distance two is subtracted from the value of distance one, and then the extension length of the asphalt sample at the time of fracture is obtained. The elongation of the asphalt can be measured through multiple tests. During the test process, the moving block 22 only moves when the asphalt sample is stretched, that is, the relative displacement distance between the moving block 22 and the positioning block 23 is the stretching length of the asphalt sample. The moving block 22 and the pointer 223 move synchronously, which is conducive to improving the accuracy of the measurement results.

[0053] Reference Figure 2 and Figure 4 The support plate 21 has a drain port 213 at the lower end thereof, which is connected to the placement groove 211, and a filter box 214 at the lower end thereof, which covers the outside of the drain port 213, and has mounting bolts thereon, which pass through the filter box 214 and are threadedly connected to the support plate 21, thereby pushing the filter box 214 to fit with the support plate 21. The filter box 214 has an opening at the lower end surface, and has a filter screen 215 corresponding to the opening.

[0054] Reference Figure 2 and Figure 4The support plate 21 is provided with baffles 216 on both sides along the width direction of the water tank 2. The baffles 216 are vertically connected to the support plate 21 in a sliding manner. When the support plate 21 moves, the baffles 216 are driven to move. When making asphalt samples, the baffles 216 are in a lower position. When measuring the elongation of the asphalt sample, the baffles 216 are moved up so that the two baffles 216 cooperate to block the gap between the moving block 22 and the fixed block.

[0055] Reference Figure 2 and Figure 4 When the asphalt sample is broken, asphalt residue is easily generated. The asphalt residue falls into the placement groove 211 of the support plate 21 under the action of gravity. During this process, the baffle 216 prevents the asphalt residue from falling into the outside of the support plate 21. After the measurement is completed, the movable seat 25 is reset and the support plate 21 is driven to move upward. At this time, the water in the placement groove 211 is discharged from the drain port 213 under the action of gravity. When the water flow moves, the asphalt waste residue moves and enters the filter box 214. The filter box 214 filters the asphalt residue through the filter net 215, thereby reducing the probability of the asphalt residue entering the water tank 2 and affecting the constant temperature water circulation.

[0056] The implementation principle of Example 1 is as follows: the support plate 21 is controlled to rise or fall by the lifting motor 111. When making an asphalt sample, the support plate 21 is manipulated to be removed from the constant temperature water in the water tank 2, and the liquid asphalt is poured into the molding groove 221, so that the asphalt is formed into the shape of a standard asphalt sample under the cooperation of the bottom plate 29, the positioning block 23, the moving block 22 and the molding block 242, and the excess asphalt outside the molding groove 221 is cleaned by the scraping plate 28. When the asphalt is naturally solidified at the standard temperature, the support plate 21 is manipulated to drive the asphalt sample to sink. Put it into the constant temperature water. When the asphalt sample is completely immersed, the bottom plate 29 is operated to separate from the asphalt sample, and the two limit blocks 24 are removed. At this time, the support plate 21 is moved to an appropriate height, and the driving member 3 is operated to drive the moving seat 25 away from the support plate 21, so that the moving seat 25 drives the moving block 22 away from the positioning block 23 through the slide rod 261 and the open ring 262, thereby driving the asphalt sample to stretch, and the moving block 22 moves to break the tensile deformation of the asphalt sample, and the moving block 22 is directly connected to the pointer 223, which is beneficial to improve the accuracy of the measurement result.

[0057] Embodiment 2:

[0058] Reference Figure 6 and Figure 7The difference between this embodiment and embodiment 1 is that a measuring piece 4 is provided at the upper end of the test bench 1, and the measuring piece 4 includes a support frame 41, a measuring gauge 42 and a standard needle 43. The support frame 41 is arranged at one end of the test bench 1 close to the support plate 21 and is vertically arranged. The support frame 41 is slidably connected with the test bench 1 along the vertical direction. The test bench 1 is provided with a lead screw 12 parallel to the support frame 41, and a driving block 412 is fixed to one side of the support frame 41. The lead screw 12 passes through the driving block 412 and is threadedly connected with the driving block 412. When the lead screw 12 is rotated, the lead screw 12 drives the support frame 41 to move vertically through the driving block 412.

[0059] Reference Figure 6 and Figure 7 The upper end of the support frame 41 is connected to the mounting frame 411 by rotating in the horizontal direction. The standard needle 43 is installed at the lower end of the mounting frame 411 and is arranged in the vertical direction. When the mounting frame 411 moves, the standard needle 43 is driven to move. The mounting frame 411 is fixed with a support arm in the horizontal direction. The standard needle 43 passes through the support arm in the axial direction and is slidably connected with the support arm. The support arm is provided with a positioning member 413, which is an abutment bolt. The abutment bolt passes through the support arm and abuts against the standard needle 43, thereby limiting the displacement of the standard needle 43 in the axial direction.

[0060] Reference Figure 6 and Figure 7 The measuring gauge 42 is located at the upper end of the mounting frame 411 and directly above the standard needle 43, and is used to measure the displacement distance of the standard needle 43 along the axial direction. The measuring gauge 42 includes a housing 421, a dial 422, a needle 423 and a measuring rod 424. The housing 421 is fixedly connected to the mounting frame 411 and moves with the mounting frame 411. The dial 422 is fixedly connected to one side of the housing 421. The dial 422 is coaxially connected to a rotating rod. The needle 423 is rotatably connected to the rotating rod and has an interference fit with the rotating rod. When there is no external force on the needle 423, the rotating rod rotates to drive the needle 423 to move. The measuring rod 424 is coaxially arranged with the standard needle 43, and the measuring rod 424 is vertically slidably connected to the housing 421. A gear set is provided between the measuring rod 424 and the rotating rod. When the measuring rod 424 moves along the axial direction, the rotating rod is driven to move through the gear set, and then the needle 423 is driven to rotate through the rotating rod.

[0061] Reference Figure 6 and Figure 7The mounting frame 411 is connected to a positioning plate 414 for rotation along the lateral direction. When the mounting frame 411 rotates, the positioning plate 414 is driven to move, and the positioning plate 414 is located below the standard needle 43. After the asphalt sample in the molding groove 221 is completely soaked, the positioning plate 414 is rotated so that the positioning plate 414 is located directly above the molding groove 221 of the positioning block 23. At this time, the lead screw 12 is rotated so that the lead screw 12 drives the support frame 41 and the mounting frame 411 to move downward, and the positioning plate 414 stops when the lower end surface of the positioning plate 414 is in contact with the upper end surface of the asphalt sample. At this time, the contact limits the standard needle 43, so that the standard needle 43 conflicts with the upper end surface of the positioning plate 414 under the action of gravity, and the standard needle 43 is positioned again by the positioning piece 413.

[0062] Reference Figure 6 and Figure 7 , rotate the positioning plate 414 and move the positioning plate 414 out from between the standard needle 43 and the asphalt sample. When the screw 12 rotates a standard arc, such as one or two circles, the distance that the support frame 41 moves vertically is adapted to the positioning plate 414. After the positioning plate 414 is moved out from under the standard needle 43, the screw 12 is rotated so that the support frame 41 drives the standard needle 43 to move a displacement consistent with the thickness of the positioning plate 414. At this time, the standard needle 43 is close to the asphalt sample, and the measuring rod 424 is moved vertically so that the measuring rod 424 contacts the upper end of the standard needle 43. The needle 423 is rotated so that the needle points to the zero scale position of the dial 422.

[0063] Reference Figure 6 and Figure 7 , release the restriction of the positioning piece 413 on the standard needle 43, so that the standard needle 43 is inserted into the asphalt sample under the action of its own gravity. When the standard needle 43 moves, the measuring rod 424 moves synchronously under the action of gravity and drives the needle 423 to move. After the standard time, the positioning piece 413 is used to position the standard needle 43 again. At this time, the scale pointed to by the needle 423 is the needle penetration of the asphalt sample.

[0064] Reference Figure 6 and Figure 7 It should be noted that the production requirements of asphalt penetration test specimens are the same as those of elongation test specimens, and both are prepared according to the method of standard T0602, including natural cooling at standard temperature, constant temperature water immersion and other processes. The asphalt sample in the molding groove 221 of the positioning block 23 mainly plays a positioning role, and does not affect the elongation measurement after the penetration test.

[0065] Reference Figure 6 and Figure 7Before conducting the elongation test of the asphalt sample, the portion in the forming groove 221 of the positioning block 23 is tested for needle penetration, thereby eliminating the need to make additional needle penetration test samples, which is beneficial to shortening the test time for the comprehensive performance of the asphalt sample and improving the convenience and efficiency of the test.

[0066] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An asphalt performance comprehensive testing device, comprising a test bench (1), wherein a water tank (2) is provided at the upper end of the test bench (1), constant temperature water circulates in the water tank (2), and a driving member (3) for stretching an asphalt sample is provided in the water tank (2), characterized in that: A lifting support plate (21) is horizontally arranged in the water tank (2), and a moving block (22) is slidably connected to the upper end of the support plate (21) along the length direction, and the support plate (21) is provided with a positioning block (23) flush with the moving block (22), and the moving block (22) moves close to or away from the positioning block (23), and the upper ends of the positioning block (23) and the moving block (22) are both provided with a forming groove (221), and a limiting block (24) is provided between the positioning block (23) and the moving block (22), and the limiting block (24) and the positioning block (23) and the moving block (22) are all detachably connected. The limiting block (24) cooperates with the inner wall of the forming groove (221) to limit the shape of the asphalt sample. The water tank (2) is slidably connected to a moving seat (25) along the length direction. The driving member (3) is used to drive the moving seat (25) to move. A connecting member (26) is provided between the moving seat (25) and the moving block (22). When the moving seat (25) moves along the length direction of the water tank (2), the moving block (22) is driven to move through the connecting member (26). A pointer (223) is fixedly provided at the upper end of the moving block (22). A scale (27) adapted to the pointer (223) is fixedly provided on the water tank (2) along the length direction. The forming groove (221) vertically penetrates the positioning block (23) and the moving block (22); a placement groove (211) is provided at the upper end of the support plate (21); a bottom plate (29) is provided in the placement groove (211); the bottom plate (29) is located directly below the positioning block (23) and is slidably connected to the support plate (21) in the transverse direction; a guide groove (212) is provided on the support plate (21) along the sliding direction of the bottom plate (29); a guide column (291) adapted to the guide groove (212) is fixedly provided on the bottom plate (29); the guide column (291) is inserted into the guide groove (212) and is connected to the guide groove (212) along the sliding direction of the bottom plate (29). ) is slidably connected to the support plate (21) in the length direction, a moving ring (292) is fixedly provided at the lower end of the bottom plate (29), a driving column (293) is slidably connected in the moving ring (292) in the vertical direction, a threaded column (294) is rotatably connected to the support plate (21) in the horizontal direction, the threaded column (294) passes through the support column and is threadedly connected to the support column, when the guide column (291) is in the middle position of the guide groove (212), the upper end surface of the bottom plate (29) contacts the lower end surface of the positioning block (23), and when the guide column (291) moves toward the end of the guide groove (212), the bottom plate (29) gradually moves away from the positioning block (23).

2. The asphalt performance comprehensive detection device according to claim 1 is characterized by: The support plate (21) is slidably connected to a scraping plate (28) along the length direction. The scraping plate (28) is located at the upper end of the positioning block (23), and the lower end of the scraping plate (28) is flush with the positioning block (23). The scraping plate (28) is fixedly provided with blade portions (281) for scraping asphalt on both sides along the length direction of the water tank (2), and a receiving groove (282) is provided at the upper end of the scraping plate (28) along the length direction of the blade portion (281).

3. The asphalt performance comprehensive detection device according to claim 1 is characterized by: The limiting block (24) comprises a mounting block (241) and a forming block (242). One side of the forming block (242) is located in the forming groove (221) and cooperates with the inner wall of the forming groove (221) to limit the shape of the asphalt sample. The positioning block (23) and the moving block (22) are both provided with a fixing groove (222). The mounting block (241) is located in the fixing groove (222) and is fitted with the forming block (242). The positioning block (23) and the fixing block are both fixed with a positioning shaft (244). The positioning shaft (244) passes through the corresponding positioning block (23) or the fixing block and is inserted into the mounting block (241). The mounting block (241) is slidably connected to the forming block (242) in the vertical direction. An elastic member (243) is provided between the mounting block (241) and the forming block (242). The elastic member (243) is used to drive the forming block (242) to fit with the bottom plate (29).

4. The asphalt performance comprehensive detection device according to claim 1, characterized in that: The connecting member (26) comprises a sliding rod (261) and an open ring (262). The sliding rod (261) is located on a side of the moving seat (25) close to the support plate (21) and is arranged in a vertical direction. The open ring (262) is located on a side of the sliding rod (261) away from the moving seat (25) and is slidably connected to the sliding rod (261) along the axis direction of the sliding rod (261). The side of the open ring (262) away from the sliding rod (261) is connected to the moving block (22). When the sliding rod (261) moves, the moving block (22) is driven to move through the open ring (262).

5. The asphalt performance comprehensive detection device according to claim 1 is characterized by: The support plate (21) is provided with baffles (216) on both sides along the length direction, and the baffles (216) are slidably connected to the support plate (21) in the vertical direction. The lower end of the support plate (21) is provided with a drainage port (213) connected to the placement groove (211), and the lower end of the support plate (21) is detachably connected with a filter box (214) adapted to the drainage port (213), and a filter net (215) is arranged in the filter box (214).

6. The asphalt performance comprehensive detection device according to claim 1, characterized in that: The test bench (1) is further provided with a support frame (41), a measuring gauge (42) and a standard needle (43); the support frame (41) is arranged at the upper end of the test bench (1), and the upper end of the support frame (41) is connected to a mounting frame (411) in a lateral rotation manner; the measuring gauge (42) is fixedly connected to the upper end of the mounting frame (411); the standard needle (43) is fixedly connected to the lower end of the mounting frame (411) and is located directly below the measuring gauge (42); the measuring gauge (42) is used to measure the vertical displacement of the standard needle (43); the mounting frame (411) is provided with a positioning member (413) for limiting the vertical displacement of the standard needle (43); when the measuring gauge (42) is located directly above the fixed plate, the standard needle (43) is directly opposite to the molding groove (221) of the positioning block (23).

7. The asphalt performance comprehensive detection device according to claim 6, characterized in that: The support frame (41) is slidably connected to the test bench (1) in the vertical direction. A driving block (412) is fixedly arranged on one side of the support frame (41). The test bench (1) is rotatably connected to a lead screw (12). The lead screw (12) is arranged in the vertical direction and passes through the driving block (412) and is threadedly connected to the driving block (412). The lower end of the mounting frame (411) is rotatably connected to a positioning plate (414) in the horizontal direction. When the lead screw (12) rotates a standard arc, the distance moved vertically by the support frame (41) is consistent with the positioning plate (414).

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