Asphalt viscosity testing device for road and bridge construction

Abstract

The invention discloses an asphalt viscosity testing device for road and bridge construction, and relates to the technical field of asphalt viscosity testing. Liquid asphalt reaching the detection temperature circularly flows between the heating mechanism and the viscosity testing mechanism, so that the asphalt can be continuously heated in the flowing process, the temperature of the asphalt is kept in a relatively stable state, and the inner walls of components such as a conveying pipe and a return pipe can be heated in the long-time flowing process of the asphalt, so that the viscosity of the asphalt is improved. Before the asphalt viscosity is detected, the temperature of the asphalt and the temperature of a component in contact with the asphalt can be kept consistent, so that the condition of heat loss before the asphalt is detected is avoided, and the accuracy of asphalt viscosity detection can be improved; the plurality of viscosity testing units are used for synchronously testing the viscosity of the asphalt at a plurality of positions at the same time, and the viscosity value of the asphalt at the testing temperature can be comprehensively evaluated, so that the condition that the testing data have relatively large deviation due to misoperation or equipment failure is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of asphalt viscosity testing, in particular to an asphalt viscosity testing device for road and bridge construction. Background Art

[0002] In road and bridge construction, asphalt materials are usually used to lay multi-layer structures. The viscosity of asphalt has an important influence on the interlayer bonding performance. Asphalt with moderate viscosity can better combine with aggregates during the compaction process to form a tight structure, thereby improving the compaction and deformation resistance of the road surface. On the contrary, if the viscosity of the asphalt is too high or too low, it may affect the compaction effect and cause problems such as looseness and deformation of the road surface. Therefore, through viscosity testing, we can understand the flow properties and viscosity characteristics of asphalt at different temperatures, providing an important basis for the selection, construction and quality control of asphalt.

[0003] A patent application with reference publication number CN117388120A discloses an asphalt viscosity testing device for road and bridge construction. By cooperating with multiple sets of detection modules and constant temperature modules, it is possible to quickly adjust the asphalt to different temperatures and derive the detection work, thereby greatly reducing the detection time of asphalt; and the asphalt can be quickly adjusted to a high or low temperature state according to the detection requirements.

[0004] Existing asphalt viscosity testing devices conduct testing by exporting heated and melted asphalt. When the melted asphalt is transferred to the viscosity testing device, due to the large temperature difference between the initial temperature of the viscosity testing device and the heated asphalt, the temperature of the asphalt may drop rapidly within a short period of time after being introduced into the viscosity testing device. As a result, the viscosity of the asphalt at the required temperature cannot be accurately tested, and only the viscosity of the asphalt at a single position can be tested, which may easily lead to errors in the test data, thereby reducing the credibility of the test results. For example, a patent application with publication number CN117388120A discloses an asphalt viscosity testing device for road and bridge construction, which utilizes the heat transfer effect between the heat dissipation fins and the constant temperature module to heat the receiving bin. The heat transfer process causes a large amount of heat loss, and the temperature of the receiving bin and the constant temperature module cannot be kept consistent, resulting in a large temperature difference between the inner wall of the receiving bin and the heated asphalt. In addition, only a single rotary viscometer is used for testing, which may easily lead to inaccurate test results due to test errors or equipment failures during the test process.

[0005] Therefore, the present invention proposes an asphalt viscosity testing device for road and bridge construction to solve the above problems. Summary of the invention

[0006] In view of the deficiencies in the prior art, the present invention provides an asphalt viscosity testing device for road and bridge construction, which solves the problem that when the melted asphalt is transferred to the viscosity testing device, the temperature of the asphalt drops rapidly within a short period of time after being introduced into the viscosity testing device due to the large temperature difference between the initial temperature of the viscosity testing device and the heated asphalt, making it impossible to accurately test the viscosity of the asphalt at the required temperature, and the asphalt viscosity can only be tested at a single position, which easily leads to errors in the test data, thereby reducing the credibility of the test results.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: an asphalt viscosity testing device for road and bridge construction, including a test bench, and also including: The viscosity testing mechanism is arranged inside the test bench and is used to perform multi-point testing on the viscosity of asphalt used in road and bridge construction, and to evaluate the viscosity of asphalt based on the test results of multiple testing points; The heating mechanism is arranged at the bottom of the internal chamber of the test bench, and is used to heat the asphalt to be tested to a preset temperature, and transport the heated asphalt to the viscosity testing mechanism, so as to complete the circulation flow operation of the asphalt between the viscosity testing mechanism and the heating mechanism; A delivery pipe is arranged on one side of the top of the heating mechanism, used to connect the viscosity testing mechanism and the heating mechanism, and to provide a channel for delivering the heated asphalt to the viscosity testing mechanism; The reflux pipe is arranged on the other side of the top of the heating mechanism and is used to provide a channel for the asphalt to reflux after entering the viscosity testing mechanism.

[0008] Furthermore, the test bench comprises: A housing, arranged on the ground, for providing a platform for asphalt viscosity testing for road and bridge construction; An installation slot is provided on the top of the housing to provide an installation space for the viscosity testing mechanism; A display module, fixedly arranged on the front side of the housing, for displaying the asphalt viscosity test results and real-time data during the test; The power supply module is fixedly arranged inside the housing and is used to provide power support for all electrical equipment; The touch module is fixedly arranged on the front side of the housing, and controls the testing process of the viscosity testing mechanism and the operating process of the heating mechanism by means of touch.

[0009] Furthermore, the viscosity testing mechanism comprises: A test box assembly is detachably arranged inside the installation slot and is used to store molten asphalt to be tested, and includes a test box and a sealing cover connected to the top of the test box by bolts, and an output pipe and an input pipe connected to the inside of the test box are fixedly arranged at both ends of the test box, and a flow meter and a throttle valve are fixedly arranged inside the input pipe; A plurality of viscosity testing units are evenly arranged inside the test box and are used to test the viscosity of asphalt at multiple locations inside the test box; A test range adjustment component is disposed on the inner wall of the test box and is used to simultaneously drive the multiple viscosity test units to be synchronously and equidistantly approached or synchronously and equidistantly away from each other, so as to change the test positions of the multiple viscosity test units; A test height adjustment assembly is provided on one side of the test range adjustment assembly and is used to simultaneously raise or lower the detection heights of a plurality of viscosity test units; The temperature sensor is fixedly arranged inside the input pipe and is used to detect the temperature of the asphalt passing through in real time.

[0010] Furthermore, the viscosity testing unit includes a viscometer and limit plates fixedly arranged on both sides of the outer wall of the viscometer, a rotating probe is fixedly arranged on the output end of the viscometer, an asphalt isolation unit is provided on the outside of the rotating probe, which is used to isolate part of the asphalt in the isolation unit to provide a fixed amount of asphalt sample for the viscosity test, and a cleaning unit is provided on the outer wall of the rotating probe for removing residual asphalt on its surface.

[0011] Furthermore, the isolation unit includes an isolation cover sleeved on the outside of the rotating probe, a lifting column is fixedly arranged on both sides of the bottom of the isolation cover, and a return spring is slidably sleeved on the outer wall of the lifting column and located between the limit plate and the isolation cover; The cleaning unit comprises a scraper ring which is slidably sleeved on the outer wall of the rotating probe, and the scraper ring is fixedly arranged on the inner wall of the isolation cover through a plurality of supporting frames.

[0012] Further, the test range adjustment component includes: A driving rod is rotatably arranged on the inner wall of the test box, an annular groove is provided in the middle of the outer wall, and a servo motor for driving the driving rod to rotate is arranged at one end of the driving rod; A first spiral groove group and a second spiral groove group are provided on the outer wall of the driving rod, the first spiral groove group and the second spiral groove group are symmetrically distributed on both sides of the annular groove, and the structures of the two are the same, the first spiral groove group includes a first spiral groove, a second spiral groove and a third spiral groove uniformly provided on one side of the outer wall of the driving rod, and the pitches of the first spiral groove, the second spiral groove and the third spiral groove are increased in the same proportion in sequence; A guide frame is fixedly arranged on the inner wall of the test box and is located below the driving rod, and a guide through groove is formed on the top of the guide frame; The movable seat assembly comprises a bearing seat slidably arranged on the inner wall of the guide groove, a push rod is fixedly passed through the bottom of the bearing seat, and a spherical block slidably arranged in the first spiral groove, the second spiral groove or the third spiral groove at the corresponding position is also fixedly arranged on the top of the push rod.

[0013] Furthermore, the test height adjustment assembly includes two guide rails fixedly arranged at relative positions on the inner wall of the test box, and a horizontal plate is slidably arranged inside the two guide rails. A sliding groove is provided on the side wall of the horizontal plate relative to the viscosity test unit, and an electric push rod is also arranged above the horizontal plate. The output end of the electric push rod is connected to the horizontal plate, and a plurality of lifting units for installing the viscosity test unit are evenly arranged inside the sliding groove, and the position of each lifting unit and the viscosity test unit is arranged one by one.

[0014] Furthermore, the lifting unit includes a lifting rod slidably arranged inside the slide groove, a lifting cylinder is fixedly passed through the inside of the lifting rod, and a mounting sleeve for installing the viscosity testing unit is fixedly arranged at the bottom end of the lifting cylinder, and each lifting cylinder sliding sleeve is arranged on the outer wall of the push rod at the corresponding position.

[0015] Furthermore, the heating mechanism includes an insulating outer cylinder and an electric heating base fixedly arranged at the bottom of the inner cavity of the insulating outer cylinder, the top of the electric heating base is detachably provided with a heating cylinder, and the outer wall of the insulating outer cylinder is also provided with a take-out port for taking out or installing the heating cylinder, the inside of the take-out port is detachably provided with an insulating sealing cover, a suction pump is also fixedly arranged inside the insulating outer cylinder, and the output end of the suction pump is connected to the delivery pipe, the input end of the suction pump and the bottom end of the return pipe are respectively fixedly provided with a first metal hose and a second metal hose, and the bottom ends of the first metal hose and the second metal hose both extend to the bottom of the inner cavity of the heating cylinder.

[0016] Furthermore, an anti-stick coating is coated on the inner wall of the test box and the inner and outer walls of the isolation cover to prevent asphalt from adhering.

[0017] The present invention provides an asphalt viscosity testing device for road and bridge construction. Compared with the prior art, it has the following beneficial effects: 1. An asphalt viscosity testing device for road and bridge construction, which can circulate liquid asphalt that reaches the detection temperature between the heating mechanism and the viscosity testing mechanism by arranging a heating mechanism, a viscosity testing mechanism, a delivery pipe and a return pipe, so that the asphalt can be continuously heated during the flow process, thereby keeping the asphalt temperature in a relatively stable state, and can heat the inner walls of components such as the delivery pipe and the return pipe during the long-term flow of the asphalt, and can ensure that the asphalt temperature and the temperature of the components in contact with the asphalt are kept consistent before the asphalt viscosity is tested, thereby avoiding heat loss before the asphalt is tested, and thus improving the accuracy of the asphalt viscosity test.

[0018] 2. An asphalt viscosity testing device for road and bridge construction, which can randomly select the testing time during the asphalt flow process by setting up a viscosity testing mechanism, and can isolate a fixed amount of asphalt in an independent space through an isolation cover, so as to achieve the purpose of providing asphalt samples with a preset temperature for viscosity testing, and achieve the purpose of random sampling of asphalt in a short time, eliminating the step of transferring asphalt from a heating device to a testing device, and can complete the viscosity test of the asphalt at the temperature in a short time during the asphalt flow process, thereby avoiding the loss of asphalt heat, ensuring the accuracy and credibility of the test results, and making the testing process simpler and faster, and during the viscosity test process, the flowing asphalt can continuously heat the asphalt inside through the isolation cover; Secondly, by setting up multiple viscosity testing units, it is possible to perform synchronous viscosity tests on asphalt at multiple locations at the same time. By using the asphalt viscosity test data at multiple locations, the viscosity value of asphalt at the test temperature can be comprehensively evaluated, thereby avoiding large deviations in test data due to operational errors or equipment failures. Moreover, the multi-point detection and adjustment process is simple and fast, and multi-point asphalt viscosity data can be obtained in a short time, thereby improving the efficiency of asphalt viscosity testing.

[0019] 3. An asphalt viscosity testing device for road and bridge construction, after testing the asphalt viscosity under one temperature condition, changes the heating temperature of the current asphalt until the temperature of the circulating asphalt is stable, and then directly conducts a viscosity test at another temperature. The asphalt viscosity test process at the two temperatures switches quickly, so that asphalt viscosity test values ​​at multiple temperatures can be obtained in a short time.

[0020] 4. An asphalt viscosity testing device for road and bridge construction, by setting a test height adjustment component, can synchronously push multiple viscosity testing units into the test position during the asphalt viscosity test process, and provide power for the isolation cover to isolate a fixed amount of asphalt; and when the isolation cover is in contact with the bottom of the inner cavity of the test box, the reaction force of the test box can be used to push the isolation cover upward, thereby being able to synchronously push the scraper ring to move upward along the outer wall of the rotating probe, thereby achieving the effect of scraping off the asphalt remaining on the rotating probe, and during the resetting process of the scraper ring, the outer wall of the rotating probe can be scraped and cleaned again, achieving the effect of two automatic cleaning, thereby ensuring that the rotating probe is in a clean state during the next test, and ensuring that the test process can proceed normally.

[0021] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the internal structure of the present invention; Figure 3 It is a schematic diagram of the structure of the viscosity testing mechanism of the present invention in an exploded state; Figure 4 This is a schematic diagram of the first cross-sectional structure of the test box of the present invention; Figure 5 It is a schematic diagram of the second cross-sectional structure of the test box of the present invention; Figure 6 For the present invention Figure 5 A schematic diagram of the enlarged structure of part A; Figure 7 It is a schematic structural diagram of the viscosity test unit, the test range adjustment component, and the test height adjustment component in the first assembly state of the present invention; Figure 8 It is a schematic diagram of the structure of the viscosity test unit, the test range adjustment component, and the test height adjustment component in the second assembly state of the present invention; Fig. 9 For the present invention Figure 8 A schematic diagram of the enlarged structure of part B in FIG. Fig.10 It is a schematic diagram of the structure of the viscosity test unit, the test range adjustment component, and the test height adjustment component in the first decomposed state of the present invention; Fig.11 For the present invention Fig.10 A schematic diagram of the enlarged structure of part C in FIG. Fig.12 It is a schematic diagram of the structure of the viscosity test unit, the test range adjustment component, and the test height adjustment component in the second decomposed state of the present invention; Fig.13 It is a schematic diagram of the cross-sectional structure of the viscosity testing unit of the present invention; Fig.14 This is a schematic structural diagram of the lifting cylinder and the push rod in the assembled state of the present invention; Fig.15 This is a schematic diagram of the structure of the test range adjustment component of the present invention; Fig.16 For the present invention Fig.15 The D part in the figure is an enlarged structural diagram; Fig.17 This is a schematic diagram of the structure of the test height adjustment assembly of the present invention; Fig.18 For the present invention Fig.17 Schematic diagram of the enlarged structure of part E in FIG.

[0023] In the figure: 1. test bench; 2. viscosity test mechanism; 21. test box; 22. sealing cover; 23. output pipe; 24. input pipe; 25. flow meter; 26. throttle valve; 27. viscosity test unit; 271. viscosity meter; 272. limit plate; 273. rotating probe; 274. isolation cover; 275. support frame; 276. scraper ring; 277. lifting column; 278. reset spring; 28. test range adjustment component; 281. drive rod; 282. ring Groove; 283, spiral groove No. 1; 284, spiral groove No. 2; 285, spiral groove No. 3; 286, servo motor; 287, guide frame; 288, guide groove; 289, bearing seat; 2810, push rod; 29, test height adjustment component; 291, guide rail; 292, cross plate; 293, electric push rod; 294, slide groove; 295, lifting rod; 296, lifting cylinder; 297, installation sleeve; 3, heating mechanism; 4, delivery pipe; 5, return pipe. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] The present invention provides three technical solutions: an asphalt viscosity testing device for road and bridge construction, specifically including the following embodiments: like Figure 1-Figure 2 A first embodiment is shown: an asphalt viscosity testing device for road and bridge construction, comprising a test bench 1, and further comprising: The viscosity testing mechanism 2 is arranged inside the test bench 1 and is used to perform a multi-point test on the viscosity of asphalt used for road and bridge construction, and to evaluate the viscosity of asphalt according to the test results of multiple detection points; The heating mechanism 3 is arranged at the bottom of the internal chamber of the test bench 1, and is used to heat the asphalt to be tested to a preset temperature, and transport the heated asphalt to the viscosity testing mechanism 2, so as to complete the circulation operation of the asphalt between the viscosity testing mechanism 2 and the heating mechanism 3; The delivery pipe 4 is arranged on one side of the top of the heating mechanism 3, and is used to connect the viscosity testing mechanism 2 and the heating mechanism 3, and provides a channel for delivering the heated asphalt to the viscosity testing mechanism 2; The reflux pipe 5 is arranged on the other side of the top of the heating mechanism 3 , and is used to provide a channel for the asphalt to reflux after entering the viscosity testing mechanism 2 .

[0026] Test bench 1 includes: A housing, arranged on the ground, for providing a platform for asphalt viscosity testing for road and bridge construction; An installation slot is provided on the top of the housing to provide an installation space for the viscosity testing mechanism 2; A display module, fixedly arranged on the front side of the housing, for displaying the asphalt viscosity test results and real-time data during the test; The power supply module is fixedly arranged inside the housing and is used to provide power support for all electrical equipment; The touch module is fixedly arranged on the front side of the housing, and controls the testing process of the viscosity testing mechanism 2 and the operating process of the heating mechanism 3 by means of touch.

[0027] like Figure 3-Figure 14 , 17, 18 show a second embodiment, which is different from the first embodiment in that: an asphalt viscosity testing device for road and bridge construction, the viscosity testing mechanism 2 includes: The test box assembly is detachably arranged inside the installation slot and is used to store the molten asphalt to be tested. It includes a test box 21 and a sealing cover 22 connected to the top of the test box 21 by bolts. The two ends of the test box 21 are respectively fixed with an output pipe 23 and an input pipe 24 connected to the inside thereof. The inside of the input pipe 24 is respectively fixed with a flow meter 25 and a throttle valve 26; the bottom end of the flow meter 25 is connected to the delivery pipe 4, and the molten asphalt flows to the flow meter 25 through the delivery pipe 4 and then flows into the test box 21; the bottom of the test box 21 is arranged horizontally to ensure that the isolation cover 274 The bottom end of the test box 21 can be in close contact with the bottom of the test box 21; the display module can display the amount of asphalt passing through the flow meter 25 in real time, and the touch module can control the amount of asphalt passing through the throttle valve 26 per unit time; the diameter of the input pipe 24 is twice that of the output pipe 23, that is, the amount of asphalt entering the test box 21 through the input pipe 24 per unit time is twice the amount of asphalt discharged through the output pipe 23, and the amount of asphalt supplied to the chamber of the test box 21 for testing each time is a fixed value, and the amount of asphalt input into the test box 21 can be controlled by controlling the amount of asphalt passing through the throttle valve 26 per unit time and the asphalt input time; A plurality of viscosity testing units 27 are evenly arranged inside the test box 21 and are used to test the viscosity of asphalt at multiple locations inside the test box 21; A test range adjustment component 28 is disposed on the inner wall of the test box 21 and is used to simultaneously drive the plurality of viscosity test units 27 to be synchronously and equidistantly approached or synchronously and equidistantly away from each other, so as to change the test positions of the plurality of viscosity test units 27; A test height adjustment component 29 is provided on one side of the test range adjustment component 28 and is used to simultaneously raise or lower the detection heights of the plurality of viscosity test units 27; The temperature sensor is fixedly arranged inside the input pipe 24 and is used to detect the temperature of the asphalt passing through in real time. The real-time asphalt temperature detected by the temperature sensor is transmitted to the display module in the form of an electrical signal, and is displayed after being converted into a digital signal by the display module.

[0028] The viscosity testing unit 27 includes a viscometer 271 and limit plates 272 fixedly arranged on both sides of the outer wall of the viscometer 271. A rotating probe 273 is fixedly arranged on the output end of the viscometer 271. The outer part of the rotating probe 273 is provided with an asphalt isolation unit for isolating part of the asphalt in the isolation unit to provide a fixed amount of asphalt sample for the viscosity test. The outer wall of the rotating probe 273 is provided with a cleaning unit for removing residual asphalt on its surface.

[0029] The isolation unit includes an isolation cover 274 sleeved on the outside of the rotating probe 273, and a lifting column 277 is fixedly arranged on both sides of the bottom of the isolation cover 274. A return spring 278 is slidably sleeved on the outer wall of the lifting column 277 and located between the limit plate 272 and the isolation cover 274; the lifting column 277 slides through the limit plate 272 at the corresponding position and extends to the outside; The cleaning unit includes a scraper ring 276 slidably mounted on the outer wall of the rotating probe 273, and the scraper ring 276 is fixedly mounted on the inner wall of the isolation cover 274 through a plurality of support frames 275. When the isolation cover 274 is not subjected to other external forces, the bottom end of the scraper ring 276 is just on the same horizontal plane as the bottom end of the rotating probe 273; an avoidance through hole is opened at the top center of the isolation cover 274, and the rotating probe 273 passes through the avoidance through hole and extends to the inside of the isolation cover 274; the viscometer 271 is electrically connected to the power supply module through a wire, and the working process of each viscometer 271 is controlled by the touch module; the top end of the viscometer 271 is detachably fixedly mounted inside the mounting sleeve 297 by bolts.

[0030] The test height adjustment assembly 29 includes two guide rails 291 fixedly arranged at relative positions on the inner wall of the test box 21, and a horizontal plate 292 is slidably arranged inside the two guide rails 291. A slide groove 294 is provided on the side wall of the horizontal plate 292 relative to the viscosity test unit 27, and an electric push rod 293 is also arranged above the horizontal plate 292. The output end of the electric push rod 293 is connected to the horizontal plate 292, and a plurality of hanging units for installing the viscosity test unit 27 are evenly arranged inside the slide groove 294, and the position of each hanging unit and the viscosity test unit 27 is arranged one by one.

[0031] The hoisting unit includes a lifting rod 295 slidably arranged inside the slide slot 294, a lifting cylinder 296 is fixedly passed through the lifting rod 295, a mounting sleeve 297 for mounting the viscosity test unit 27 is fixedly arranged at the bottom end of the lifting cylinder 296, and each lifting cylinder 296 is slidably sleeved on the outer wall of the push rod 2810 at the corresponding position. The viscosity meter 271 is installed inside the mounting sleeve 297 and locked by bolts, and the electric push rod 293 is fixedly arranged on the top of the sealing cover 22; the positions of the lifting unit, the viscosity test unit 27, and the push rod 2810 are arranged one by one.

[0032] The heating mechanism 3 includes an insulating outer cylinder and an electric heating base fixedly arranged at the bottom of the inner cavity of the insulating outer cylinder. The top of the electric heating base is detachably provided with a heating cylinder, and the outer wall of the insulating outer cylinder is also provided with a take-out port for taking out or installing the heating cylinder. The inside of the take-out port is detachably provided with an insulating sealing cover. A suction pump is also fixedly arranged inside the insulating outer cylinder, and the output end of the suction pump is connected to the delivery pipe 4. The input end of the suction pump and the bottom end of the return pipe 5 are respectively fixedly provided with a first metal hose and a second metal hose, and the bottom ends of the first metal hose and the second metal hose extend to the bottom of the inner cavity of the heating cylinder. The outer walls of the output pipe 23, the input pipe 24, the heating mechanism 3 and the return pipe 5 are all fixedly provided with an insulating layer to reduce the heat loss during the flow of asphalt. The electric heating base is electrically connected to the power supply module through a wire, and the on and off of the power supply circuit is controlled by the touch module. By changing the heating temperature of the electric heating base, the viscosity test of asphalt at different temperatures can be realized.

[0033] The inner wall of the test box 21 and the inner and outer walls of the isolation cover 274 are coated with an anti-stick coating to prevent asphalt from adhering.

[0034] like Figure 15-16 A third embodiment is shown, which differs from the second embodiment in that: a device for testing asphalt viscosity for road and bridge construction, the test range adjustment component 28 comprises: The driving rod 281 is rotatably arranged on the inner wall of the test box 21, and an annular groove 282 is provided in the middle of the outer wall thereof, and a servo motor 286 for driving the driving rod 281 to rotate is provided at one end thereof; the servo motor 286 is fixedly arranged on the outer wall of the test box 21, and the output shaft of the servo motor 286 rotates through the test box 21 and is fixedly connected to one end of the driving rod 281; The first spiral groove group and the second spiral groove group are formed on the outer wall of the driving rod 281. The first spiral groove group and the second spiral groove group are symmetrically distributed on both sides of the annular groove 282, and the structures of the two are the same. The first spiral groove group includes a first spiral groove 283, a second spiral groove 284 and a third spiral groove 285 uniformly formed on one side of the outer wall of the driving rod 281. The pitches of the first spiral groove 283, the second spiral groove 284 and the third spiral groove 285 increase in the same proportion in sequence. The guide frame 287 is fixedly disposed on the inner wall of the test box 21 and is located below the driving rod 281. A guide slot 288 is formed on the top of the guide frame 287. The movable seat assembly includes a bearing seat 289 slidably disposed on the inner wall of the guide groove 288, a push rod 2810 is fixedly penetrated at the bottom of the bearing seat 289, and a spherical block slidably disposed in the corresponding position of the first spiral groove 283, the second spiral groove 284, or the third spiral groove 285 is fixedly disposed at the top of the push rod 2810. The bottom end of the push rod 2810 penetrates the bearing seat 289 and extends to the outside.

[0035] When in use, first remove the heat preservation sealing cover in the access port, then take out the heating cylinder through the access port, and after a certain amount of asphalt to be tested is loaded into the heating cylinder, install it again on the electric heating base in the heat preservation outer cylinder through the access port, and ensure that the heating cylinder is located in the middle of the electric heating base, and then place the bottom ends of the first metal hose and the second metal hose on both sides of the inside of the heating cylinder, and then use the heat preservation sealing cover to seal the access port; Next, the touch module is used to control the power supply of the electric heating base to be turned on, and the electric heating base is controlled to heat the heating cylinder at a preset temperature for a preset time, and the preset heating time can ensure that the asphalt can completely form a flowable liquid; Next, the suction pump is turned on through the touch module to suck the liquid asphalt through the first metal hose and transport the asphalt to the input pipe 24 through the delivery pipe 4. The liquid asphalt flows into the interior of the test box 21 through the flow meter 25 and the throttle valve 26. It should be noted that before the amount of asphalt in the test box 21 reaches a fixed detection value, it is in a fully open state, that is, its own maximum flow rate, and because the diameter of the input pipe 24 is twice that of the output pipe 23, that is, when the throttle valve 26 is fully open, the asphalt entering the test box 21 through the input pipe 24 per unit time is The amount of asphalt discharged through the output pipe 23 is twice the amount of asphalt supplied to the chamber of the test box 21. Therefore, when the amount of asphalt passing through the flow meter 25 is twice the amount of asphalt supplied to the chamber of the test box 21, the amount of asphalt passing through the throttle valve 26 per unit time is reduced to half of the previous amount through the touch module. At this time, the amount of asphalt entering the test box 21 through the input pipe 24 and the amount of asphalt discharged from the test box 21 through the output pipe 23 per unit time are equal, that is, the amount of asphalt in the test box 21 is ensured to be the required fixed detection amount. When the fixed detection amount is reached, the bottom end of the isolation cover 274 in the initial position state does not contact the asphalt; Next, when the temperature sensor shows that the real-time temperature of the asphalt is the asphalt temperature under the required test state, the touch module controls the electric push rod 293 to descend to a preset height, which can ensure that the bottom end of the isolation cover 274 is in contact with the bottom of the test box 21, and moves upward under the reaction force of the bottom of the test box 21, so that the scraper ring 276 moves from the bottom of the outer wall of the rotating probe 273 to the top of the outer wall of the rotating probe 273; the electric push rod 293 pushes the cross plate 292 to move downward, and since the multiple lifting rods 295 are slidably arranged inside the slide groove 294, and the viscosity test unit 27 is fixedly arranged inside the mounting sleeve 297, the multiple mounting sleeves 29 7 drives the viscosity meter 271 at the corresponding position to move downward synchronously. After the bottom end of the isolation cover 274 contacts the bottom of the test box 21, a fixed amount of asphalt is isolated inside the isolation cover 274, and the asphalt liquid level reaches half of the inner cavity height of the isolation cover 274. At the same time, the inner wall of the test box 21 pushes the isolation cover 274 to move upward, and half of the rotating probe 273 is completely immersed in the asphalt, and the scraper ring 276 moves up along the outer wall of the rotating probe 273 to the highest point of its outer wall. At this time, the viscosity test unit 27 can be controlled by the touch module to detect the viscosity of the asphalt. The viscosity test units 27 at multiple positions transmit the test data to the display module through the cable for display; When it is necessary to test the viscosity of asphalt at other positions in the test box 21, by controlling the servo motor 286 to rotate at a low speed for a preset time, the drive rod 281 rotates forward or reversely, and the push rods 2810 at multiple positions slide along the No. 1 spiral groove 283 or the No. 2 spiral groove 284 or the No. 3 spiral groove 285 at the corresponding position. Since the pitches of the No. 1 spiral groove 283, the No. 2 spiral groove 284 and the No. 3 spiral groove 285 increase proportionally in sequence, the push rods 2810 at multiple positions are pushed by the No. 1 spiral groove 283 or the No. 2 spiral groove 284 or the No. 3 spiral groove 285 at the corresponding position, and the support seat 289 slides synchronously with the push rod 2810 along the inner wall of the guide groove 288 until it is adjusted to a new preset position, and the viscosity of the asphalt can be tested again.

[0036] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An asphalt viscosity testing device for road and bridge construction, comprising a test bench, characterized in that: Also includes: The viscosity testing mechanism is arranged inside the test bench and is used to perform multi-point testing on the viscosity of asphalt used in road and bridge construction, and to evaluate the viscosity of asphalt based on the test results of multiple testing points; The heating mechanism is arranged at the bottom of the internal chamber of the test bench, and is used to heat the asphalt to be tested to a preset temperature, and transport the heated asphalt to the viscosity testing mechanism, so as to complete the circulation flow operation of the asphalt between the viscosity testing mechanism and the heating mechanism; A delivery pipe is arranged on one side of the top of the heating mechanism, used to connect the viscosity testing mechanism and the heating mechanism, and to provide a channel for delivering the heated asphalt to the viscosity testing mechanism; The reflux pipe is arranged on the other side of the top of the heating mechanism and is used to provide a channel for the asphalt to reflux after entering the viscosity testing mechanism.

2. The asphalt viscosity testing device for road and bridge construction according to claim 1, characterized in that: The test bench comprises: A housing, arranged on the ground, for providing a platform for asphalt viscosity testing for road and bridge construction; An installation slot is provided on the top of the housing to provide an installation space for the viscosity testing mechanism; A display module, fixedly arranged on the front side of the housing, for displaying the asphalt viscosity test results and real-time data during the test; The power supply module is fixedly arranged inside the housing and is used to provide power support for all electrical equipment; The touch module is fixedly arranged on the front side of the housing, and controls the testing process of the viscosity testing mechanism and the operating process of the heating mechanism by means of touch.

3. The asphalt viscosity testing device for road and bridge construction according to claim 1, characterized in that: The adhesion testing mechanism includes: A test box assembly is detachably arranged inside the installation slot and is used to store molten asphalt to be tested, and includes a test box and a sealing cover connected to the top of the test box by bolts, and an output pipe and an input pipe connected to the inside of the test box are fixedly arranged at both ends of the test box, and a flow meter and a throttle valve are fixedly arranged inside the input pipe; A plurality of viscosity testing units are evenly arranged inside the test box and are used to test the viscosity of asphalt at multiple locations inside the test box; A test range adjustment component is disposed on the inner wall of the test box and is used to simultaneously drive the multiple viscosity test units to be synchronously and equidistantly approached or synchronously and equidistantly away from each other, so as to change the test positions of the multiple viscosity test units; A test height adjustment assembly is provided on one side of the test range adjustment assembly and is used to simultaneously raise or lower the detection heights of a plurality of viscosity test units; The temperature sensor is fixedly arranged inside the input pipe and is used to detect the temperature of the asphalt passing through in real time.

4. The asphalt viscosity testing device for road and bridge construction according to claim 3 is characterized by: The viscosity testing unit includes a viscometer and limit plates fixedly arranged on both sides of the outer wall of the viscometer. A rotating probe is fixedly arranged on the output end of the viscometer. An asphalt isolation unit is sleeved on the outside of the rotating probe for isolating part of the asphalt in the isolation unit to provide a fixed amount of asphalt sample for the viscosity test. A cleaning unit is sleeved on the outer wall of the rotating probe for removing residual asphalt on its surface.

5. The asphalt viscosity testing device for road and bridge construction according to claim 4, characterized in that: The isolation unit comprises an isolation cover sleeved on the outside of the rotating probe, a lifting column is fixedly arranged on both sides of the bottom of the isolation cover, and a return spring is slidably sleeved on the outer wall of the lifting column and located between the limit plate and the isolation cover; The cleaning unit comprises a scraper ring which is slidably sleeved on the outer wall of the rotating probe, and the scraper ring is fixedly arranged on the inner wall of the isolation cover through a plurality of supporting frames.

6. The asphalt viscosity testing device for road and bridge construction according to claim 3, characterized in that: The test range adjustment component includes: A driving rod is rotatably arranged on the inner wall of the test box, an annular groove is provided in the middle of the outer wall, and a servo motor for driving the driving rod to rotate is arranged at one end of the driving rod; A first spiral groove group and a second spiral groove group are provided on the outer wall of the driving rod, the first spiral groove group and the second spiral groove group are symmetrically distributed on both sides of the annular groove, and the structures of the two are the same, the first spiral groove group includes a first spiral groove, a second spiral groove and a third spiral groove uniformly provided on one side of the outer wall of the driving rod, and the pitches of the first spiral groove, the second spiral groove and the third spiral groove are increased in the same proportion in sequence; A guide frame is fixedly arranged on the inner wall of the test box and is located below the driving rod, and a guide through groove is formed on the top of the guide frame; The movable seat assembly comprises a bearing seat slidably arranged on the inner wall of the guide groove, a push rod is fixedly passed through the bottom of the bearing seat, and a spherical block slidably arranged in the first spiral groove, the second spiral groove or the third spiral groove at the corresponding position is fixedly arranged on the top of the push rod.

7. The asphalt viscosity testing device for road and bridge construction according to claim 6, characterized in that: The test height adjustment assembly includes two guide rails fixedly arranged at relative positions on the inner wall of the test box, and a horizontal plate is slidably arranged inside the two guide rails. A sliding groove is provided on the side wall of the horizontal plate relative to the viscosity test unit, and an electric push rod is also arranged above the horizontal plate. The output end of the electric push rod is connected to the horizontal plate, and a plurality of hoisting units for installing the viscosity test unit are evenly arranged inside the sliding groove, and the position of each hoisting unit and the viscosity test unit is arranged one by one.

8. The asphalt viscosity testing device for road and bridge construction according to claim 7, characterized in that: The hoisting unit includes a lifting rod slidably arranged inside a slide groove, a lifting cylinder is fixedly passed through the interior of the lifting rod, a mounting sleeve for mounting a viscosity testing unit is fixedly arranged at the bottom end of the lifting cylinder, and each lifting cylinder sliding sleeve is arranged on the outer wall of the push rod at a corresponding position.

9. The asphalt viscosity testing device for road and bridge construction according to claim 1, characterized in that: The heating mechanism includes an insulating outer cylinder and an electric heating base fixedly arranged at the bottom of the inner cavity of the insulating outer cylinder, the top of the electric heating base is detachably provided with a heating cylinder, and the outer wall of the insulating outer cylinder is also provided with a take-out port for taking out or installing the heating cylinder, the inside of the take-out port is detachably provided with an insulating sealing cover, a suction pump is also fixedly arranged inside the insulating outer cylinder, and the output end of the suction pump is connected to the delivery pipe, the input end of the suction pump and the bottom end of the return pipe are respectively fixedly provided with a first metal hose and a second metal hose, and the bottom ends of the first metal hose and the second metal hose both extend to the bottom of the inner cavity of the heating cylinder.

10. The asphalt viscosity testing device for road and bridge construction according to claim 5, characterized in that: The inner wall of the test box and the inner and outer walls of the isolation cover are coated with an anti-stick coating to prevent asphalt from adhering.

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