An asphalt viscosity testing device for road and bridge construction

Abstract

The present invention discloses an asphalt viscosity testing device for road and bridge construction, and the present invention relates to the technical field of asphalt viscosity testing. By circulating the liquid asphalt at the detection temperature between the heating mechanism and the viscosity testing mechanism, the asphalt can be continuously heated during the flowing process, so as to keep the asphalt temperature in a relatively stable state, and the inner walls of components such as the conveying pipe and the return pipe can be heated during the long-term flowing process of the asphalt. Before detecting the viscosity of the asphalt, it can ensure that the temperature of the asphalt and the temperature of the components in contact with the asphalt are consistent, avoiding the situation of heat loss before asphalt detection, and further improving the accuracy of asphalt viscosity detection; by simultaneously testing the viscosity of asphalt at multiple positions through multiple viscosity testing units, the viscosity value of the asphalt at the test temperature can be comprehensively evaluated, thus avoiding the situation that the test data has a large deviation due to operation errors or equipment failures.

Description

Technical Field

[0001] The present invention relates to the technical field of asphalt viscosity testing, and specifically 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 multiple layers. The viscosity of asphalt has an important impact 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 degree and anti-deformation ability of the road surface. On the contrary, if the asphalt viscosity is too high or too low, it may affect the compaction effect, resulting in problems such as looseness and deformation of the road surface. Therefore, through viscosity testing, the flow performance and viscosity characteristics of asphalt at different temperatures can be understood, providing an important basis for the selection, construction, and quality control of asphalt.

[0003] Referring to a patent application with the publication number CN117388120A, which discloses an asphalt viscosity testing device for road and bridge construction. Through the cooperation of multiple sets of detection modules and a constant temperature module, it realizes how to quickly adjust the temperature of asphalt at different temperatures and conduct export detection, greatly reducing the detection time of asphalt; and the asphalt can be quickly adjusted to a high temperature or a low temperature state according to the detection requirements.

[0004] Existing asphalt viscosity testing devices export the heated and melted asphalt for detection. 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, it is easy to cause the temperature of the asphalt to drop rapidly in a short time when it is introduced into the viscosity testing device, thus unable to accurately measure the viscosity of the asphalt at the required temperature. And it can only test the viscosity of asphalt at a single position, which is prone to errors in test data, thereby reducing the credibility of the test results. For example, a patent application with the publication number CN117388120A discloses an asphalt viscosity testing device for road and bridge construction. It uses the heat transfer between the heat dissipation fins and the constant temperature module to heat the material receiving bin. However, a large amount of heat loss will occur during the heat transfer process, and the temperature of the material receiving bin and the constant temperature module cannot be kept consistent, resulting in a still large temperature difference between the inner wall of the material receiving bin and the heated asphalt. And only a single rotary viscometer is used for testing, which is prone to inaccurate test results due to test errors or equipment failures during the test.

[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 of the prior art, the present invention provides an asphalt viscosity testing device for road and bridge construction, which solves the problems that when the melted asphalt is transferred to the viscosity testing device at present, due to the large temperature difference between the initial temperature of the viscosity testing device and the heated asphalt, it is easy to cause the temperature of the asphalt to drop rapidly within a short time when it is introduced into the viscosity testing device, so that the viscosity of the asphalt at the required temperature cannot be accurately measured, and only the viscosity of the asphalt at a single position can be tested, which easily leads to errors in the test data and thus reduces the credibility of the test results.

[0007] To achieve the above objectives, the present invention is realized through the following technical solutions: An asphalt viscosity testing device for road and bridge construction, including a test bench, further including:

[0008] A viscosity testing mechanism, arranged inside the test bench, used for multi-point testing of the viscosity of asphalt for road and bridge construction, and evaluating the asphalt viscosity according to the test results of multiple detection points;

[0009] A heating mechanism, arranged at the bottom of the inner chamber of the test bench, used for heating the asphalt to be tested to a preset temperature and transporting the heated asphalt into the viscosity testing mechanism to complete the circulating operation of the asphalt between the viscosity testing mechanism and the heating mechanism;

[0010] A conveying pipe, arranged on one side of the top of the heating mechanism, used to connect the viscosity testing mechanism and the heating mechanism and provide a channel for transporting the heated asphalt to the viscosity testing mechanism;

[0011] A reflux pipe, arranged on the other side of the top of the heating mechanism, used to provide a channel for the asphalt to reflux after entering the viscosity testing mechanism.

[0012] Further, the test bench includes:

[0013] A housing, arranged on the ground, used to provide a platform for testing the viscosity of asphalt for road and bridge construction;

[0014] An installation through groove, opened on the top of the housing, used to provide an installation space for the viscosity testing mechanism;

[0015] A display module, fixedly arranged on the front of the housing, used to display the asphalt viscosity test results and real-time data during the test process;

[0016] A power supply module, fixedly arranged inside the housing, used to provide power support for all electrical equipment;

[0017] A touch control module, fixedly arranged on the front of the housing, used to control the test process of the viscosity testing mechanism and the operation process of the heating mechanism by touch.

[0018] Further, the viscosity testing mechanism includes:

[0019] The test box assembly is detachably arranged inside the installation through groove and is used for storing molten asphalt to be tested. It includes a test box and a sealing cover bolted to the top of the test box. Output pipes and input pipes respectively communicating with the inside are fixedly arranged at both ends of the test box. A flowmeter and a throttle valve are fixedly arranged inside the input pipe.

[0020] A plurality of viscosity test units are evenly arranged inside the test box and are used for testing the viscosity of asphalt at multiple positions inside the test box.

[0021] The test range adjustment assembly is arranged on the inner wall of the test box and is used for simultaneously driving a plurality of viscosity test units to approach or move away from each other synchronously and equidistantly, so as to change the test positions of the plurality of viscosity test units.

[0022] The test height adjustment assembly is arranged on one side of the test range adjustment assembly and is used for simultaneously lifting or lowering the detection height of a plurality of viscosity test units.

[0023] The temperature sensor is fixedly arranged inside the input pipe and is used for real-time detecting the temperature of the passing asphalt.

[0024] Further, the viscosity test unit includes a viscosimeter and limit plates fixedly arranged on both sides of the outer wall of the viscosimeter. A rotating probe is fixedly arranged at the output end of the viscosimeter. An asphalt isolation unit is sleeved outside the rotating probe and is used for isolating part of the asphalt inside the isolation unit to provide a fixed amount of asphalt sample for viscosity testing. And a cleaning unit for removing the residual asphalt on its surface is sleeved on the outer wall of the rotating probe.

[0025] Further, the isolation unit includes an isolation cover sleeved outside the rotating probe. A lifting column is fixedly arranged on both sides of the bottom of the isolation cover. A return spring is slidably sleeved on the outer wall of the lifting column between the limit plate and the isolation cover.

[0026] The cleaning unit includes a scraping ring slidably sleeved on the outer wall of the rotating probe. The scraping ring is fixedly arranged on the inner wall of the isolation cover through a plurality of support frames.

[0027] Further, the test range adjustment assembly includes:

[0028] A driving rod is rotatably arranged on the inner wall of the test box. An annular groove is opened at the middle position of its outer wall. And a servo motor for driving itself to rotate is arranged at one end of the driving rod.

[0029] The first spiral groove group and the second spiral groove group are formed 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 their structures are the same. The first spiral groove assembly includes the first spiral groove, the second spiral groove, and the third spiral groove evenly formed on one side of the outer wall of the driving rod. The pitches of the first spiral groove, the second spiral groove, and the third spiral groove increase in equal proportion in sequence.

[0030] The guide frame is fixedly arranged on the inner wall of the test box and below the driving rod. A guide through groove is formed at the top of the guide frame.

[0031] The moving seat assembly includes a bearing seat slidably arranged on the inner wall of the guide through groove. A push rod is fixedly penetrated through the bottom of the bearing seat, and a spherical block slidably arranged in the corresponding first spiral groove or the second spiral groove or the third spiral groove is fixedly arranged at the top end of the push rod.

[0032] Further, the test height adjustment assembly includes two guide sliding rails fixedly arranged at opposite positions on the inner wall of the test box. A cross plate is jointly slidably arranged inside the two guide sliding rails. A sliding groove is formed on the side wall of the cross plate facing the viscosity test unit, and an electric push rod is further arranged above the cross plate. The output end of the electric push rod is connected to the cross plate. A plurality of hoisting units for installing the viscosity test unit are evenly arranged inside the sliding groove, and each hoisting unit is arranged in one-to-one correspondence with the viscosity test unit.

[0033] Further, the hoisting unit includes a lifting rod slidably arranged inside the sliding groove. A lifting cylinder is fixedly penetrated through the lifting rod. An installation sleeve for installing the viscosity test unit is fixedly arranged at the bottom end of the lifting cylinder. Each lifting cylinder is slidably sleeved on the outer wall of the push rod at the corresponding position.

[0034] Further, the heating mechanism includes a heat preservation outer cylinder and an electric heating base fixedly arranged at the bottom of the inner cavity of the heat preservation outer cylinder. A heating cylinder is detachably arranged at the top of the electric heating base. A pick-and-place opening for taking out or installing the heating cylinder is formed on the outer wall of the heat preservation outer cylinder. A heat preservation sealing cover is detachably arranged inside the pick-and-place opening. A suction pump is fixedly arranged inside the heat preservation outer cylinder, and the output end of the suction pump is connected to a 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.

[0035] Further, anti-adhesive coatings are coated on the inner wall of the test box and the inner and outer walls of the isolation cover to prevent asphalt adhesion.

[0036] The present invention provides an asphalt viscosity test device for road and bridge construction. Compared with the prior art, the following beneficial effects are achieved:

[0037] 1. An asphalt viscosity testing device for road and bridge construction, by setting a heating mechanism, a viscosity testing mechanism, a delivery pipe and a reflux pipe, can make the liquid asphalt reaching the detection temperature circulate between the heating mechanism and the viscosity testing mechanism, so that the asphalt can be continuously heated during the flowing process, thus keeping the asphalt temperature in a relatively stable state, and can heat the inner walls of components such as the delivery pipe and the reflux pipe during the long-term flowing process of the asphalt. Before detecting the asphalt viscosity, it can ensure that the asphalt temperature is consistent with the temperature of the components in contact with the asphalt, avoiding heat loss before asphalt detection, and thus can improve the accuracy of asphalt viscosity detection.

[0038] 2. An asphalt viscosity testing device for road and bridge construction, by setting a viscosity testing mechanism, can randomly select the detection time during the flowing process of the asphalt, and through the isolation cover, a part of a fixed amount of asphalt can be isolated in an independent space, so as to achieve the purpose of providing a preset temperature asphalt sample for viscosity detection, realizing the purpose of randomly sampling the asphalt in a short time, eliminating the step of transferring the asphalt from the heating device to the detection device, and can complete the viscosity test of the asphalt at this temperature within a short time during the flowing process of the asphalt, thus avoiding heat loss of the asphalt and ensuring the accuracy and reliability of the test results. At the same time, the detection process is made simpler and faster. Moreover, during the viscosity test process, the flowing asphalt can continuously heat the asphalt inside the isolation cover;

[0039] Secondly, by setting multiple viscosity testing units, the viscosity of asphalt at multiple positions can be synchronously tested at the same time. Using the viscosity test data of asphalt at multiple positions, the viscosity value of the asphalt at the test temperature can be comprehensively evaluated, so as to avoid the situation that the test data has a large deviation due to operation errors or equipment failures. Moreover, the multi-point detection and adjustment process is simple and fast, and the viscosity data of multi-point asphalt can be obtained within a short time, thus improving the efficiency of asphalt viscosity testing.

[0040] 3. An asphalt viscosity testing device for road and bridge construction, after testing the asphalt viscosity under a certain temperature condition, by changing the heating temperature of the current asphalt until the temperature of the circulating asphalt is stable, the viscosity test at another temperature can be directly carried out. The switching speed of the asphalt viscosity test process at two temperatures is fast, so that the viscosity test values of the asphalt at multiple temperatures can be obtained within a short time.

[0041] 4. An asphalt viscosity testing device for road and bridge construction. By setting a test height adjustment component, it can synchronously push multiple viscosity testing units into the test position during the asphalt viscosity test, providing power for the isolation cover to isolate a fixed amount of asphalt. And when the isolation cover contacts the bottom of the inner cavity of the test box, it can use the reaction force of the test box to push the isolation cover upward, thereby synchronously pushing the scraping ring upward along the outer wall of the rotating probe, and then achieving the effect of scraping off the asphalt remaining on the rotating probe. Moreover, during the reset process of the scraping ring, it can scrape and clean the outer wall of the rotating probe again, achieving the effect of automatic cleaning twice, thus ensuring that the rotating probe is in a clean state during the next test and ensuring that the test process can proceed normally.

[0042] Other advantages, objectives, and features of the present invention will be described to some extent in the subsequent specification, and to some extent, will be obvious to those skilled in the art based on the study of the following text, 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 specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 is a schematic three-dimensional structure diagram of the whole of the present invention;

[0044] Figure 2 is a schematic internal structure diagram of the present invention;

[0045] Figure 3 is a schematic exploded state structure diagram of the viscosity testing mechanism of the present invention;

[0046] Figure 4 is a schematic first sectional structure diagram of the test box of the present invention;

[0047] Figure 5 is a schematic second sectional structure diagram of the test box of the present invention;

[0048] Figure 6 For the present invention Figure 5 is an enlarged schematic structure diagram of part A;

[0049] Figure 7 is a schematic first assembled state structure diagram of the viscosity testing unit, test range adjustment component, and test height adjustment component of the present invention;

[0050] Figure 8 is a schematic second assembled state structure diagram of the viscosity testing unit, test range adjustment component, and test height adjustment component of the present invention;

[0051] Figure 9 For the present invention Figure 8 is an enlarged schematic structure diagram of part B;

[0052] Figure 10Schematic diagram of the first disassembled state structure of the viscosity testing unit, test range adjusting component, and test height adjusting component of the present invention;

[0053] Figure 11 of the present invention Figure 10 Schematic diagram of the enlarged structure of part C in;

[0054] Figure 12 Schematic diagram of the second disassembled state structure of the viscosity testing unit, test range adjusting component, and test height adjusting component of the present invention;

[0055] Figure 13 Schematic diagram of the sectional structure of the viscosity testing unit of the present invention;

[0056] Figure 14 Schematic diagram of the assembled state structure of the lifting cylinder and the push rod of the present invention;

[0057] Figure 15 Schematic diagram of the test range adjusting component of the present invention;

[0058] Figure 16 of the present invention Figure 15 Schematic diagram of the enlarged structure of part D in;

[0059] Figure 17 Schematic diagram of the test height adjusting component of the present invention;

[0060] Figure 18 of the present invention Figure 17 Schematic diagram of the enlarged structure of part E in.

[0061] In the figure: 1. Test bench; 2. Viscosity testing mechanism; 21. Test box; 22. Sealing cover; 23. Output pipe; 24. Input pipe; 25. Flowmeter; 26. Throttle valve; 27. Viscosity testing unit; 271. Viscosimeter; 272. Limiting plate; 273. Rotating probe; 274. Isolation cover; 275. Support frame; 276. Scraping ring; 277. Lifting column; 278. Return spring; 28. Test range adjusting component; 281. Driving rod; 282. Annular groove; 283. First spiral groove; 284. Second spiral groove; 285. Third spiral groove; 286. Servo motor; 287. Guide frame; 288. Guide through groove; 289. Bearing seat; 2810. Push rod; 29. Test height adjusting component; 291. Guide sliding rail; 292. Cross plate; 293. Electric push rod; 294. Chute; 295. Lifting rod; 296. Lifting cylinder; 297. Installation sleeve; 3. Heating mechanism; 4. Delivery pipe; 5. Return pipe. Detailed implementation mode

[0062] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0063] The present invention provides three technical solutions: an asphalt viscosity testing device for road and bridge construction, specifically including the following embodiments:

[0064] As Figure 1 - Figure 2 shows the first implementation manner: an asphalt viscosity testing device for road and bridge construction, including a test bench 1, and further including:

[0065] A viscosity testing mechanism 2, arranged inside the test bench 1, is used for performing multi-point testing on the asphalt viscosity in road and bridge construction, and evaluating the asphalt viscosity according to the test results of multiple detection points;

[0066] A heating mechanism 3, arranged at the bottom of the inner chamber of the test bench 1, is used for heating the asphalt to be tested to a preset temperature and conveying the heated asphalt into the viscosity testing mechanism 2 to complete the circulating flow operation of the asphalt between the viscosity testing mechanism 2 and the heating mechanism 3;

[0067] A conveying pipe 4, arranged on one side at the top of the heating mechanism 3, is used for connecting the viscosity testing mechanism 2 and the heating mechanism 3 and providing a channel for conveying the heated asphalt to the viscosity testing mechanism 2;

[0068] A return pipe 5, arranged on the other side at the top of the heating mechanism 3, is used for providing a channel for the asphalt to flow back after entering the viscosity testing mechanism 2.

[0069] The test bench 1 includes:

[0070] A housing, arranged on the ground, is used for providing a platform for testing the asphalt viscosity in road and bridge construction;

[0071] An installation through groove, opened on the top of the housing, is used for providing an installation space for the viscosity testing mechanism 2;

[0072] A display module, fixedly arranged on the front of the housing, is used for displaying the asphalt viscosity test results and real-time data during the test process;

[0073] A power supply module, fixedly arranged inside the housing, is used for providing power support for all electrical equipment;

[0074] A touch module, fixedly arranged on the front of the housing, is used for controlling the test process of the viscosity testing mechanism 2 and the operation process of the heating mechanism 3 by touch.

[0075] As Figure 3 - Figure 14 , Figures 17 and 18 show the second embodiment, which is different from the first embodiment in that: an asphalt viscosity testing device for road and bridge construction, and the viscosity testing mechanism 2 includes:

[0076] A test box assembly, detachably arranged inside the installation through groove, for storing the molten asphalt to be tested, which includes a test box 21 and a sealing cover 22 bolted to the top of the test box 21. Output pipes 23 and input pipes 24 respectively communicating with the inside are fixedly arranged at both ends of the test box 21. A flow meter 25 and a throttle valve 26 are respectively fixedly arranged inside the input pipe 24; the bottom end of the flow meter 25 is connected to the delivery pipe 4, and the molten asphalt flows through the delivery pipe 4 to the flow meter 25 and then into the test box 21; the bottom of the test box 21 is horizontally arranged to ensure that the bottom end of the isolation cover 274 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 control 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 for detection in the chamber of the test box 21 each time is a fixed value. By controlling the amount of asphalt passing through the throttle valve 26 per unit time and the asphalt input time, the amount of asphalt input into the test box 21 can be controlled;

[0077] A plurality of viscosity testing units 27, evenly arranged inside the test box 21, for testing the asphalt viscosity at multiple positions inside the test box 21;

[0078] A test range adjustment assembly 28, arranged on the inner wall of the test box 21, for simultaneously driving a plurality of viscosity testing units 27 to approach or move away from each other synchronously and equidistantly, so as to change the test positions of the plurality of viscosity testing units 27;

[0079] A test height adjustment assembly 29, arranged on one side of the test range adjustment assembly 28, for simultaneously lifting or lowering the detection height of a plurality of viscosity testing units 27;

[0080] A temperature sensor, fixedly arranged inside the input pipe 24, for real-time detection of the asphalt temperature passing through. The real-time asphalt temperature detected by the temperature sensor is transmitted to the display module in the form of an electrical signal, and after being converted into a digital signal by the display module, it is displayed.

[0081] 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.

[0082] 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;

[0083] 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.

[0084] 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.

[0085] 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.

[0086] The heating mechanism 3 includes a heat-insulating outer cylinder and an electric heating base fixedly arranged at the bottom of the inner cavity of the heat-insulating outer cylinder. A heating cylinder is detachably arranged on the top of the electric heating base. A pick-and-place opening for taking out or installing the heating cylinder is formed on the outer wall of the heat-insulating outer cylinder. A heat-insulating sealing cover is detachably arranged inside the pick-and-place opening. A suction pump is fixedly arranged inside the heat-insulating outer cylinder. The output end of the suction pump is connected to the conveying 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. 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. Heat-insulating layers are fixedly sleeved on the outer walls of the output pipe 23, the input pipe 24, the heating mechanism 3 and the return pipe 5 to reduce heat loss during the flow of asphalt. The electric heating base is electrically connected to the power supply module through a wire. The on-off of the power supply circuit is controlled by a touch module. By changing the heating temperature of the electric heating base, the viscosity test of asphalt at different temperatures can be realized.

[0087] Anti-sticking coatings are coated on the inner wall of the test box 21 and the inner and outer walls of the isolation cover 274 to prevent asphalt from adhering.

[0088] As Figure 15 - Figure 16 The third implementation manner is shown. The difference from the second implementation manner is that: for an asphalt viscosity test device for road and bridge construction, the test range adjustment assembly 28 includes:

[0089] A driving rod 281 is rotatably arranged on the inner wall of the test box 21. An annular groove 282 is formed in the middle position of its outer wall. One end of the driving rod 281 is provided with a servo motor 286 for driving its own rotation. The servo motor 286 is fixedly arranged on the outer wall of the test box 21. 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.

[0090] A first spiral groove group and a 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 have the same structure. The first spiral groove assembly includes a first spiral groove 283, a second spiral groove 284 and a third spiral groove 285 evenly 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 equal proportion in sequence.

[0091] A guide frame 287 is fixedly arranged on the inner wall of the test box 21 and below the driving rod 281. A guide through groove 288 is formed at the top of the guide frame 287.

[0092] The moving seat assembly includes a bearing seat 289 slidably arranged on the inner wall of the guiding through groove 288. A push rod 2810 is fixedly penetrated through the bottom of the bearing seat 289, and a spherical block slidably arranged in the first spiral groove 283 or the second spiral groove 284 or the third spiral groove 285 at the corresponding position is fixedly arranged at the top end of the push rod 2810. The bottom end of the push rod 2810 penetrates through the bearing seat 289 and extends to the outside.

[0093] During use, first, the heat preservation sealing cover in the access opening is disassembled, and then the heating cylinder is taken out through the access opening. After loading a certain amount of asphalt to be tested into the heating cylinder, it is installed on the electric heating base in the heat preservation outer cylinder through the access opening again, and it is ensured that the heating cylinder is located at the middle position of the electric heating base. Then, the bottom ends of the first metal hose and the second metal hose are respectively placed on both sides inside the heating cylinder, and then the access opening is sealed by using the heat preservation sealing cover.

[0094] Next, the power supply of the electric heating base is controlled to be turned on through the touch control module, and the electric heating base is controlled to heat the heating cylinder at a preset temperature for a preset time, and this preset heating time can ensure that the asphalt can be completely formed into a flowable liquid.

[0095] Next, the suction pump is controlled to work through the touch control module. The suction pump sucks the liquid asphalt through the first metal hose and conveys the asphalt to the input pipe 24 through the conveying pipe 4. The liquid asphalt flows into the inside of the test box 21 through the flowmeter 25 and the throttle valve 26. It should be noted that before the amount of asphalt in the test box 21 reaches the fixed detection value, it is in a fully open state, that is, its own maximum flow rate. And since the diameter of the input pipe 24 is twice that of the output pipe 23, that is, when the throttle valve 26 is in a fully open state, the amount of asphalt entering the test box 21 through the input pipe 24 per unit time is twice that discharged through the output pipe 23. Therefore, when the amount of asphalt passing through the flowmeter 25 is twice the amount of asphalt supplied for detection in the chamber of the test box 21, the amount of asphalt passing through the throttle valve 26 per unit time is controlled to be reduced to half of the previous amount through the touch control module. At this time, the amount of asphalt entering the test box 21 through the input pipe 24 per unit time is equal to the amount of asphalt discharged from the test box 21 through the output pipe 23, that is, to ensure that the amount of asphalt in the test box 21 is the required fixed detection amount. When reaching this fixed detection amount, the bottom end of the isolation cover 274 in the initial position state does not contact the asphalt.

[0096] Next, when the temperature sensor shows that the real-time temperature of the asphalt is the asphalt temperature in the required test state, the electric push rod 293 is controlled to descend by a preset height through the touch control module. This preset descending height can ensure that the bottom end of the isolation cover 274 contacts the bottom of the test box 21, and it moves upward under the reaction force at the bottom of the test box 21, so that the scraping ring 276 moves from the bottommost end of the outer wall of the rotating probe 273 to the uppermost end of the outer wall of the rotating probe 273; the electric push rod 293 pushes the cross plate 292 to move downward. Since multiple lifting rods 295 are slidably arranged inside the chute 294 and the viscosity test unit 27 is fixedly arranged inside the mounting sleeve 297, multiple mounting sleeves 297 drive the viscometers 271 at corresponding positions 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 height of the asphalt liquid level reaches half of the height of the inner cavity 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, while the scraping ring 276 moves upward along the outer wall of the rotating probe 273 to the highest point of its outer wall. At this time, the touch control module can be used to control the viscosity test unit 27 to detect the viscosity of the asphalt, and the viscosity test units 27 at multiple positions transmit the test data to the display module for display;

[0097] When it is necessary to measure the viscosity of the asphalt at other positions in the test box 21, the servo motor 286 is controlled to rotate slowly for a preset time, the driving rod 281 rotates forward or backward, and the push rods 2810 at multiple positions slide along the first spiral groove 283 or the second spiral groove 284 or the third spiral groove 285 at corresponding positions. Since the pitches of the first spiral groove 283, the second spiral groove 284, and the third spiral groove 285 increase in equal proportion in sequence, the push rods 2810 at multiple positions approach or move away from each other simultaneously under the push of the first spiral groove 283 or the second spiral groove 284 or the third spiral groove 285 at corresponding positions. The bearing seat 289 slides synchronously along the inner wall of the guiding through groove 288 with the push rod 2810. After being adjusted to a new preset position, the viscosity of the asphalt can be measured again.

[0098] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0099] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and 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, including a test bench, characterized in that, It further includes: A viscosity testing mechanism, which is arranged inside the test bench and is used for performing multi-point testing on the viscosity of asphalt used in road and bridge construction, and evaluating the asphalt viscosity according to the test results of multiple detection points; A heating mechanism, which is arranged at the bottom of the inner chamber of the test bench and is used for heating the asphalt to be tested to a preset temperature and conveying the heated asphalt into the viscosity testing mechanism to complete the circulating flow operation of the asphalt between the viscosity testing mechanism and the heating mechanism; A conveying pipe, which is arranged on one side of the top of the heating mechanism and is used for connecting the viscosity testing mechanism and the heating mechanism and providing a channel for conveying the heated asphalt to the viscosity testing mechanism; A reflux pipe, which is arranged on the other side of the top of the heating mechanism and is used for providing a channel for the asphalt to reflux after entering the viscosity testing mechanism; The viscosity testing mechanism includes: A test box assembly, which is detachably arranged inside the installation through groove and is used for storing the molten asphalt to be tested. It includes a test box and a sealing cover bolted to the top of the test box. Output pipes and input pipes respectively communicating with the inside are fixedly arranged at both ends of the test box. A flow meter and a throttle valve are respectively fixedly arranged inside the input pipe; Multiple viscosity testing units, which are evenly arranged inside the test box and are used for testing the viscosity of asphalt at multiple positions inside the test box; A test range adjusting assembly, which is arranged on the inner wall of the test box and is used for simultaneously driving multiple viscosity testing units to approach or move away from each other synchronously and equidistantly to change the test positions of multiple viscosity testing units; A test height adjusting assembly, which is arranged on one side of the test range adjusting assembly and is used for simultaneously lifting or lowering the detection height of multiple viscosity testing units; A temperature sensor, which is fixedly arranged inside the input pipe and is used for real-time detection of the temperature of the passing asphalt; The viscosity testing unit includes a viscosimeter and limit plates fixedly arranged on both sides of the outer wall of the viscosimeter. A rotating probe is fixedly arranged at the output end of the viscosimeter. An asphalt isolation unit is sleeved outside the rotating probe and is used for isolating part of the asphalt inside the isolation unit to provide a fixed amount of asphalt sample for viscosity testing. And a cleaning unit for removing the residual asphalt on its surface is sleeved on the outer wall of the rotating probe; The isolation unit includes an isolation cover sleeved outside the rotating probe. A lifting column is fixedly arranged on both sides of the bottom of the isolation cover. A return spring is slidably sleeved on the outer wall of the lifting column between the limit plate and the isolation cover; The cleaning unit includes a scraping ring slidably sleeved on the outer wall of the rotating probe. The scraping ring is fixedly arranged on the inner wall of the isolation cover through multiple support frames; The test range adjusting assembly includes: A driving rod, which is rotatably arranged on the inner wall of the test box. An annular groove is opened at the middle position of its outer wall. And a servo motor for driving itself to rotate is arranged at one end of the driving rod; A first spiral groove group and a second spiral groove group, which are opened 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 have the same structure. The first spiral groove assembly includes a first spiral groove, a second spiral groove and a third spiral groove evenly opened on one side of the outer wall of the driving rod. The pitches of the first spiral groove, the second spiral groove and the third spiral groove increase in equal proportion in sequence; The guide frame is fixedly arranged on the inner wall of the test box and below the driving rod, and a guide through groove is opened at the top of the guide frame; The moving seat assembly includes a bearing seat slidably arranged on the inner wall of the guide through groove. A push rod is fixedly penetrated through the bottom of the bearing seat, and a spherical block slidably arranged in the first spiral groove or the second spiral groove or the third spiral groove at the corresponding position is fixedly arranged at the top end of the push rod.

2. The asphalt viscosity testing device for road and bridge construction according to claim 1, wherein: The test bench includes: The housing is arranged on the ground and provides a platform for the asphalt viscosity test in road and bridge construction; The installation through groove is opened at the top of the housing and provides an installation space for the viscosity test mechanism; The display module is fixedly arranged on the front of the housing and is used to display the asphalt viscosity test results and real-time data during the test process; The power supply module is fixedly arranged inside the housing and provides power support for all electrical equipment; The touch control module is fixedly arranged on the front of the housing and controls the test process of the viscosity test mechanism and the operation process of the heating mechanism by touch.

3. The asphalt viscosity testing device for road and bridge construction according to claim 1, characterized in that: The test height adjustment assembly includes two guide rails fixedly arranged at opposite positions on the inner wall of the test box. A cross plate is slidably arranged inside the two guide rails. A chute is opened on the side wall of the cross plate opposite to the viscosity test unit, and an electric push rod is further arranged above the cross plate. The output end of the electric push rod is connected to the cross plate. A plurality of hoisting units for installing the viscosity test unit are evenly arranged inside the chute, and each hoisting unit is arranged in one-to-one correspondence with the viscosity test unit.

4. The asphalt viscosity testing device for road and bridge construction according to claim 3, wherein: The hoisting unit includes a lifting rod slidably arranged inside the chute. A lifting cylinder is fixedly penetrated through the inside of the lifting rod. An installation sleeve for installing the viscosity test unit is fixedly arranged at the bottom end of the lifting cylinder, and each lifting cylinder is slidably sleeved on the outer wall of the push rod at the corresponding position.

5. The asphalt viscosity testing device for road and bridge construction according to claim 1, characterized in that: The heating mechanism includes a heat preservation outer cylinder and an electric heating base fixedly arranged at the bottom of the inner cavity of the heat preservation outer cylinder. A heating cylinder is detachably arranged at the top of the electric heating base, and a pick-and-place opening for taking out or installing the heating cylinder is opened on the outer wall of the heat preservation outer cylinder. A heat preservation sealing cover is detachably arranged inside the pick-and-place opening. A suction pump is fixedly arranged inside the heat preservation outer cylinder, and the output end of the suction pump is connected to a 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.

6. The asphalt viscosity testing device for road and bridge construction according to claim 1, characterized in that: Anti-sticking coatings are coated on the inner wall of the test box and the inner and outer walls of the isolation cover to prevent asphalt adhesion.

Images