An asphalt viscosity testing device for road construction

Abstract

This invention relates to the field of asphalt viscosity testing technology, and more particularly to an asphalt viscosity testing device for road construction. It includes a support frame, a tester mounted at the top of the support frame, a rotor screwed to the output end of the tester, and a heating furnace corresponding to the rotor mounted on the inner side of the support frame. Two sets of protective components for rotor protection are symmetrically arranged on the bottom surface of the tester, each set of protective components having auxiliary mounting components for rotor installation. A driving component for driving the two sets of protective components is also provided on the bottom surface of the tester. This invention, through the design of two detachable and fitting protective shells, effectively prevents asphalt adhering to the rotor surface from dripping and contaminating the experimental environment or equipment after leaving the heating range, thus improving the safety and cleanliness of the experiment. Simultaneously, the sealing plate and slot design between the protective shells further ensures that asphalt does not seep out, enhancing the protective effect.

Description

Technical Field

[0001] This invention relates to the field of asphalt viscosity testing technology, and more specifically, to an asphalt viscosity testing device for road construction. Background Technology

[0002] Asphalt viscosity testing is a crucial step in evaluating the performance of asphalt materials, and the test results directly affect the application effect of asphalt in road engineering. Among them, the rotation method (Brockfield viscometer method) calculates the apparent viscosity by the torque generated by the rotor rotating in the asphalt. It is suitable for viscosity testing in a temperature range above 45°C. The whole process is simple to operate and can obtain results quickly, but attention should be paid to the selection of rotor model and speed.

[0003] A search revealed a Chinese invention patent with publication number CN117388120A, which discloses an asphalt viscosity testing device for road and bridge construction. The device includes a sliding frame, a mixing module, a constant temperature module, a heating barrel, a testing module, and an insulation chamber. The mixing module is vertically fixed on the sliding frame. The constant temperature module is also vertically fixed on the sliding frame, and a heating barrel for holding the asphalt can be detachably installed inside the constant temperature module. The testing module is vertically positioned against the side wall of the constant temperature module to perform viscosity testing on the asphalt discharged from the heating barrel. Three sets of testing modules are provided, each attached to one of the three sides of the testing module, and each set is also covered with an insulation chamber for heat preservation. This device can not only quickly raise and lower the asphalt to be tested to the required temperature but also maintain a constant temperature, thereby ensuring the final testing accuracy.

[0004] The aforementioned patents still have shortcomings in practical use:

[0005] During the rotational testing of asphalt viscosity, asphalt in a high-temperature liquid state inevitably adheres to the rotor surface. As the rotor rises and moves out of the heating furnace's range, this adhered asphalt rapidly cools and solidifies due to the ambient temperature being far below the asphalt's softening or flow temperature. Furthermore, if the rotor is not properly handled in a timely manner, the asphalt adhering to its surface is highly susceptible to dripping under gravity. This can directly contaminate the experimental platform, equipment casing, or floor, causing cleaning difficulties, and may also lead to equipment malfunctions or safety hazards if the asphalt drips onto inappropriate locations (such as electronic components or precision instrument surfaces). Therefore, a solution is urgently needed. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide an asphalt viscosity testing device for road construction. The device, through the design of two separable and fitable protective shells, effectively prevents the asphalt adhering to the rotor surface from dripping and contaminating the experimental environment or equipment after leaving the heating range, thereby improving the safety and cleanliness of the experiment. At the same time, the sealing plate and slot design between the protective shells further ensures that the asphalt will not seep out, enhancing the protective effect.

[0007] To achieve the aforementioned objective, the technical solution of the present invention is implemented as follows: an asphalt viscosity testing device for road construction, comprising a support, a tester being provided at the top of the support, a rotor being screwed to the output end of the tester, and a heating furnace corresponding to the rotor being provided on the inner side of the support.

[0008] The bottom surface of the tester is symmetrically provided with two sets of protective components for rotor protection, and each set of protective components is provided with auxiliary mounting components for mounting the rotor.

[0009] The bottom surface of the tester is provided with a drive component for driving two sets of protective components, and the bottom surface of the tester is provided with an anti-drip component for preventing asphalt leakage.

[0010] The auxiliary installation component is provided with an operating component for driving the auxiliary installation component.

[0011] Preferably, the protective assembly includes a fixed plate fixedly installed on the bottom surface of the tester, a shaft rotatably mounted on the side of the fixed plate, a rotating rod fixedly mounted on the shaft, a support rod rotatably mounted on the bottom end of the rotating rod, and a protective shell corresponding to the rotor fixedly mounted on the bottom outer wall of the support rod.

[0012] Preferably, a sealing insert is fixedly installed on the bottom side of one of the two protective shells, and a sealing slot corresponding to the sealing insert is opened on the bottom side of the other protective shell.

[0013] Preferably, the inner side of the protective shell is filled with a layer of thermal insulation material.

[0014] Preferably, the drive assembly includes a slot formed on the bottom surface of the tester, a drive screw rotatably mounted on the inner wall of the slot, two guide blocks symmetrically screwed to the outer wall of the drive screw, and the guide blocks slidingly connected to the inner wall of the slot, the threads on the two outer walls of the drive screw having opposite directions, a connecting rod fixedly mounted on the bottom surface of the guide block, a drive rack fixedly mounted on the end of the connecting rod away from the guide block, the end of the shaft passing through the side of the fixed plate and fixedly mounted with a transmission gear meshing with the drive rack, and a servo motor whose output end is fixedly connected to the drive screw fixedly mounted on the side of the tester.

[0015] Preferably, the anti-drip assembly includes a gear fixedly mounted on the outer wall of the top of the support rod, a vertical rod fixedly mounted on the bottom surface of the tester, and an arc-shaped rack that meshes with the gear fixedly mounted on the bottom end of the vertical rod, the arc-shaped rack being coaxially arranged with the shaft.

[0016] Preferably, the auxiliary installation assembly includes an elastic support rod fixedly installed on the outer wall of the support rod, a semi-circular plate fixedly installed at the telescopic end of the elastic support rod, a guide groove is provided on the inner wall of the semi-circular plate, a transmission semi-circular plate is slidably installed on the inner wall of the guide groove, a clamping frame is fixedly installed on the inner wall of the transmission semi-circular plate, and a clamping piece is slidably installed on the inner wall of the clamping frame.

[0017] Preferably, the operating component includes a connecting box fixedly installed on the outer wall of the semicircular plate, a rotating shaft rotatably installed on the inner wall of the connecting box, a drive wheel fixedly installed at the bottom end of the rotating shaft, a clearance opening communicating with the guide groove on the outer wall of the semicircular plate, and the drive wheel passing through the clearance opening and fitting against the outer wall of the transmission semicircular plate, a take-up reel fixedly fitted on the outer wall of the rotating shaft, a pull rope provided on the inner side of the take-up reel, a torsion spring fitted on the top end of the rotating shaft, and the two ends of the torsion spring fixedly connected to the rotating shaft and the connecting box respectively, and a limiting component adapted to the rotating shaft provided on the inner top surface of the connecting box.

[0018] Preferably, the limiting component includes a ratchet fixedly mounted on the top of the rotating shaft, an operating rod extending through the top surface of the connecting box, a pawl that meshes with the ratchet fixedly mounted at the bottom end of the operating rod, and a torsion spring II mounted on the outer wall of the operating rod, with both ends of the torsion spring II fixedly connected to the operating rod and the connecting box, respectively.

[0019] Preferably, the pulling end of the pull rope passes through the side of the connecting box and is fixedly installed with a pull ring.

[0020] The beneficial effects of this invention are reflected in:

[0021] (1) The device provided by the present invention effectively prevents the asphalt adhering to the rotor surface from dripping and contaminating the experimental environment or equipment after leaving the heating range through the design of two separable and fitting protective shells, thereby improving the safety and cleanliness of the experiment. At the same time, the sealing plate and slot design between the protective shells further ensures that the asphalt will not seep out, thus enhancing the protective effect.

[0022] (2) The device provided by the present invention utilizes a drive system composed of a pull rope, a drive wheel, and a transmission semicircular plate to realize the automated installation and disassembly of the rotor. This not only improves work efficiency but also reduces errors and safety hazards that may be caused by manual operation. In addition, the design of the elastic support rod and clamping plate enables the rotor to be automatically aligned and clamped during installation, further improving the accuracy and stability of installation.

[0023] (3) The heat insulation material layer built into the protective shell of the device provided by the present invention effectively slows down the cooling rate of the asphalt on the outer wall of the rotor, reduces the solidification of the asphalt, and facilitates subsequent cleaning. At the same time, the support rod can drive the protective shell to rotate during the rotation process, so that the opening of the protective shell changes from downward to upward, avoiding the dripping of asphalt from the internal rotor, and further enhancing the practicality and convenience of the equipment. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ;

[0025] Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 ;

[0026] Figure 3 This is a schematic diagram of the structure of the protective component of the present invention;

[0027] Figure 4 This is a schematic diagram of a partial cross-section of the protective shell of the present invention;

[0028] Figure 5 for Figure 2 Enlarged structural diagram at point A in the middle;

[0029] Figure 6 This is a schematic diagram of the structure of the tester of the present invention;

[0030] Figure 7 for Figure 6 Enlarged structural diagram at point B;

[0031] Figure 8 This is a schematic diagram of the auxiliary installation component of the present invention;

[0032] Figure 9 This is a schematic diagram of the internal structure of the connecting box of the present invention;

[0033] Figure 10 This is a schematic diagram of the structure of the operating component and the limiting component of the present invention.

[0034] Figure labels and descriptions

[0035] 1. Bracket; 2. Tester; 3. Rotor; 4. Heating furnace; 5. Protective components; 6. Drive components; 7. Anti-drip components; 8. Auxiliary installation components; 9. Operating components; 10. Limiting components; 51. Fixing plate; 52. Shaft; 53. Rotating rod; 54. Support rod; 55. Protective shell; 56. Sealing insert; 57. Sealing slot; 58. Insulation material layer; 61. Slot; 62. Drive screw; 63. Guide block; 64. Connecting rod; 65. Drive rack; 66. 67. Transmission gear; 71. Servo motor; 72. Gear set; 73. Upright pole; 74. Arc rack; 85. Elastic support rod; 86. Semicircular plate; 87. Guide groove; 88. Transmission semicircular plate; 99. Clamping frame; 90. Clamping plate; 91. Connecting box; 92. Rotating shaft; 93. Drive wheel; 94. Clearance opening; 95. Rewinding reel; 96. Pull rope; 97. Pull ring; 98. Torsion spring one; 109. Ratchet; 100. Operating lever; 101. Pawl; 102. Torsion spring two. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] Example 1

[0038] This invention provides an asphalt viscosity testing device for road construction. Existing rotors 3 have high-temperature liquid asphalt adhering to their surface. After being removed from the heating, the asphalt cools and solidifies rapidly due to the low ambient temperature. If not handled in time, the asphalt can easily drip and contaminate the platform and equipment, or even drip onto electronic components, causing malfunctions or safety hazards.

[0039] Therefore, this invention provides an asphalt viscosity testing device for road construction, see [link to related document]. Figure 1 , Figure 2 As shown: It includes a bracket 1, a tester 2 is provided at the top of the bracket 1, a rotor 3 is screwed to the output end of the tester 2, a heating furnace 4 corresponding to the rotor 3 is provided on the inner side of the bracket 1, two sets of protective components 5 for protecting the rotor 3 are symmetrically provided on the bottom surface of the tester 2, and a driving component 6 for driving the two sets of protective components 5 is provided on the bottom surface of the tester 2.

[0040] In actual use, the operator can preheat the asphalt to be tested to the test temperature and then add it to the heating furnace 4 for heat preservation. The rotor 3 is selected according to the asphalt's properties. After selection, the rotor 3 is screwed onto the output end of the tester 2. Then, the height of the bracket 1 is adjusted so that the rotor 3 at the output end of the tester 2 is inserted into the asphalt inside the heating furnace 4, with the scale line on the rotor 3 below the asphalt surface. The tester 2 is then turned on, causing the rotor 3 to rotate and test the viscosity of the asphalt. By reading the test results on the screen of the tester 2, the viscosity parameters of the asphalt can be accurately obtained. After the test, the bracket 1 can be adjusted to raise the tester 2, and the rotor 3 is moved out of the heating furnace 4. The protective component 5, driven by the drive component 6, is positioned outside the rotor 3 to protect it and prevent asphalt adhering to its outer wall from dripping.

[0041] For details, see Figure 3 , Figure 4 , Figure 5 As shown: Since the asphalt is in a liquid state during the test and easily adheres to the outer wall of the rotor 3, the rotor 3 needs to be wrapped after the test to prevent the asphalt on its outer wall from dripping onto the table. At the same time, the asphalt needs to be insulated to prevent it from solidifying quickly. The protective component 5 includes a fixed plate 51 fixedly installed on the bottom surface of the tester 2. A shaft 52 is rotatably installed on the side of the fixed plate 51. A rotating rod 53 is fixedly fitted on the shaft 52. A support rod 54 is rotatably installed at the bottom end of the rotating rod 53. A protective shell 55 corresponding to the rotor 3 is fixedly installed on the bottom outer wall of the support rod 54. A sealing insert plate 56 is fixedly installed on the bottom side of one of the two protective shells 55, and a sealing slot 57 corresponding to the sealing insert plate 56 is opened on the bottom side of the other protective shell 55. The inner side of the protective shell 55 is filled with a heat insulation material layer 58.

[0042] In actual use, when initially installing the rotor 3, under the action of the drive assembly 6, the two support rods 54 and the protective shell 55 are in a separated state, and the angle formed between the two protective shells 55 is at least less than 30 degrees. The operator can place the rotor 3 between the two protective shells 55, and the scale line on the rotor 3 must be located in the protective shell 55. Then the drive assembly 6 can be turned on to drive the protective shells 55 so that the two protective shells 55 are close together, and the installation of the rotor 3 can begin.

[0043] When the rotor 3 is installed and put into use, the two support rods 54 and the protective shell 55 are separated during the downward movement of the tester 2 by the drive assembly 6, exposing the rotor 3 and avoiding interference with its downward movement. When the rotor 3 is reset after testing, the shaft 52 can rotate under the drive assembly 6, causing the rotating rod 53, support rods 54, and protective shell 55 to rotate as well. This brings the two protective shells 55 closer together and they fit together, encasing the rotor 3 inside the two protective shells 55. The sealing plate 56 on the side of one protective shell 55 can be inserted into the sealing slot 57 on the side of the other protective shell 55, sealing the contact point between the two protective shells 55 and preventing asphalt from seeping out. At the same time, the insulation material layer 58 inside the protective shell 55 can insulate the inside of the protective shell 55, allowing the asphalt on the outer wall of the rotor 3 to cool more slowly, reducing asphalt solidification and facilitating subsequent cleaning.

[0044] Further, see Figure 5 , Figure 7 As shown, the protective shell 55 needs to be in different positions during the installation, testing, and test completion stages of the rotor 3, and external force is required to drive the protective shell 55 in different positions. Therefore, the drive assembly 6 includes a slot 61 opened on the bottom surface of the tester 2. A drive screw 62 is rotatably installed on the inner wall of the slot 61. Two guide blocks 63 are symmetrically screwed to the outer wall of the drive screw 62, and the guide blocks 63 are slidably connected to the inner wall of the slot 61. The threads on the outer walls of the two sides of the drive screw 62 are opposite in direction. A connecting rod 64 is fixedly installed on the bottom surface of the guide block 63. A drive rack 65 is fixedly installed at the end of the connecting rod 64 away from the guide block 63. The end of the shaft 52 passes through the side of the fixed plate 51 and is fixedly installed with a transmission gear 66 that meshes with the drive rack 65. A servo motor 67 with its output end fixedly connected to the drive screw 62 is fixedly installed on the side of the tester 2.

[0045] In actual use, when driving the shaft 52, the servo motor 67 can be turned on to drive the drive screw 62 to rotate. Since the guide block 63 is screwed to the drive screw 62 and slidably connected to the inner wall of the slot 61, the rotation of the drive screw 62 can drive the guide block 63 to slide along the slot 61. Since the threads on both sides of the outer wall of the drive screw 62 are in opposite directions, its rotation can drive the two guide blocks 63 to slide in opposite directions. Then, through the connecting rod 64, the drive rack 65 is driven to slide on the bottom surface of the tester 2. The drive rack 65 meshes with the transmission gear 66, which can drive the transmission gear 66 and the shaft 52 to rotate, thereby driving the support rod 54 and the protective shell 55. The two guide blocks 63 slide in opposite directions, which can make the two protective shells 55 move in opposite directions.

[0046] Among them, see Figure 5As shown, when the protective shell 55 covers and protects the rotor 3, asphalt may drip onto the inner wall of the protective shell 55. When the protective shell 55 is opened, its opening faces downwards, causing asphalt to drip onto the table. Therefore, the protective shell 55 needs to be flipped so that its opening faces upwards. The bottom surface of the tester 2 is provided with an anti-drip component 7 for flipping the support rod 54 and the protective shell 55. The anti-drip component 7 includes a gear 71 fixedly mounted on the outer wall of the top of the support rod 54. The bottom surface of the tester 2 is fixedly installed with a vertical rod 72. The bottom end of the vertical rod 72 is fixedly installed with an arc-shaped rack 73 that meshes with the gear 71. The arc-shaped rack 73 is coaxially arranged with the shaft 52.

[0047] In actual use, as the rotor 3 moves down and is inserted into the heating furnace 4, the servo motor 67 is activated, driving the drive rack 65 to slide, thereby driving the shaft 52 to rotate. As the support rod 54 rotates with the rotating rod 53 and the shaft 52, the sleeve gear 71 on its outer wall can mesh with the arc-shaped rack 73, causing the support rod 54 to rotate 180 degrees. The protective shell 55 rotates with the support rod 54, causing the opening of the protective shell 55 to change from facing downwards to facing upwards, preventing the asphalt dripping from the internal rotor 3 from dripping out. When the servo motor 67 reverses, causing the protective shells 55 to come closer together, the support rod 54 can reverse itself as it rotates with the shaft 52, allowing the protective shell 55 to return to its initial state for close contact and protection.

[0048] Further, see Figure 3 , Figure 8 As shown, during rotor 3 installation, due to the thinness of the rotor 3 rod and the output end of the tester 2, and the fact that the tester 2 can obstruct the operator's view, rotor 3 requires quick alignment for installation. The outer walls of both support rods 54 are equipped with auxiliary installation components 8 for installing rotor 3. Each auxiliary installation component 8 has an operating component 9 for driving it. The auxiliary installation component 8 includes an elastic support rod 81 fixedly installed on the outer wall of the support rod 54. A semi-circular plate 82 is fixedly installed at the telescopic end of the elastic support rod 81. A guide groove 83 is provided on the inner wall of the semi-circular plate 82. A transmission semi-circular plate 84 is slidably installed on the inner wall of the guide groove 83. A clamping frame 85 is fixedly installed on the inner wall of the transmission semi-circular plate 84. A clamping piece 86 is slidably installed on the inner wall of the clamping frame 85.

[0049] In actual use, before the rotor 3 is installed, it can be placed between the two protective shells 55. At this time, the servo motor 67 is started to make the two protective shells 55 fit together. When the support rod 54 drives the protective shells 55 to rotate with the shaft 52, the two semi-circular plates 82 can form a ring attached to the outer wall of the rotor 3 under the action of the elastic support rod 81. Under the action of elasticity, the clamping plate 86 can clamp the rotor 3. After the rotor 3 is clamped, it can be directly aligned with the output end of the tester 2. Then, the operator can control the transmission through the operating component 9. The semicircular plate 84 is driven, causing the two transmission semicircular plates 84 to rotate in the two guide grooves 83, and driving the rotating shaft 92 to rotate through the clamping plate 86. The rotor 3 is screwed to the output end of the tester 2, so it can be tightened to the output end of the tester 2 when it rotates, and it can move upward and drive the clamping plate 86 to move upward in the clamping frame 85. Since the rotor 3 is screwed to the output end of the tester 2 and the thread is fixed, the transmission semicircular plate 84 can be completely located in a single guide groove 83 after it moves, and no misalignment will occur.

[0050] For details, see Figure 3 , Figure 9 , Figure 10 As shown, due to the use of two transmission semicircular plates 84, it is inconvenient to drive them. Therefore, an external drive source is required to drive the transmission semicircular plates 84. The operating component 9 includes a connecting box 91 fixedly installed on the outer wall of the semicircular plate 82. A rotating shaft 92 is rotatably installed on the inner wall of the connecting box 91. A drive wheel 93 is fixedly installed at the bottom end of the rotating shaft 92. A clearance opening 94 communicating with the guide groove 83 is opened on the outer wall of the semicircular plate 82. The drive wheel 93 passes through the clearance opening 94 and fits against the outer wall of the transmission semicircular plate 84. A winding reel 95 is fixedly fitted on the outer wall of the rotating shaft 92. A pull rope 96 is provided on the inner side of the winding reel 95. The pulling end of the pull rope 96 passes through the side of the connecting box 91 and is fixedly installed with a pull ring 97. A torsion spring 98 is fitted on the top end of the rotating shaft 92. The two ends of the torsion spring 98 are fixedly connected to the rotating shaft 92 and the connecting box 91, respectively. A limiting component 10 adapted to the rotating shaft 92 is provided on the inner top surface of the connecting box 91.

[0051] In actual use, when driving the clamp 86, the operator can pull the pull ring 97. When the pull ring 97 is pulled, the pull rope 96 is pulled and the winding reel 95 is rotated, which in turn drives the drive wheel 93 to rotate. When the drive wheel 93 rotates, its outer wall is in contact with the outer wall of the transmission semicircular plate 84, which in turn drives the transmission semicircular plate 84 to rotate in the guide groove 83, thereby realizing the drive installation of the rotor 3.

[0052] For details, see Figure 3 , Figure 9 , Figure 10As shown, the installation and disassembly of rotor 3 need to be carried out at different times. After its installation, when the semicircular plate 82 is separated from rotor 3, the transmission semicircular plate 84 needs to be limited before rotor 3 can be directly removed. The limiting component 10 includes a ratchet 101 fixedly mounted on the top of the rotating shaft 92. An operating rod 102 is provided through the top surface of the connecting box 91. A pawl 103 that meshes with the ratchet 101 is fixedly installed at the bottom of the operating rod 102. A torsion spring 104 is mounted on the outer wall of the operating rod 102, and the two ends of the torsion spring 104 are fixedly connected to the operating rod 102 and the connecting box 91, respectively.

[0053] In actual use, when the rotor 3 is disassembled after testing, the two protective shells 55 are in a close fit and the pull rope 96 is pulled out. When the pull rope 96 is pulled out, the torsion spring 98 can be compressed. At this time, the rotation direction of the shaft 92 is the free direction of the ratchet 101 and pawl 103. After the torsion spring 98 is compressed, it has a reversing force on the shaft 92. At this time, the reversing direction of the shaft 92 is the locking direction of the ratchet 101 and pawl 103. Therefore, during disassembly, the operator can rotate the operating lever 102 to separate the pawl 103 from the ratchet 101, thereby releasing the limit on the rotating shaft 92. At this time, under the action of the torsion spring 98, the rotating shaft 92 can reverse, thereby driving the transmission semicircular plate 84 to reverse and remove the rotor 3 from the output end of the tester 2 through the clamp 86. The winding reel 95 can wind up the pull rope 96 for reuse. After the rotor 3 is removed, the servo motor 67 can be started to separate the two protective shells 55. The operator can then hold the rotor 3 and remove it.

[0054] In summary, the protective shell 55 can be detached and fitted, and with the sealing structure, it effectively prevents asphalt dripping and contamination, improving experimental safety and cleanliness. At the same time, the rotation of the support rod 54 drives the protective shell 55 to rotate, changing the opening direction to prevent leakage. The use of components such as the pull rope 96 enables automated installation and disassembly of the rotor 3, reducing human error and potential hazards. The elastic support and clamp design 86 ensure installation accuracy. The built-in insulation material layer 58 delays asphalt cooling, facilitates cleaning, simplifies the operation process, and the overall design is efficient and practical.

[0055] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An asphalt viscosity testing device for road construction, comprising a support (1), a tester (2) being disposed at the top of the support (1), a rotor (3) being screwed to the output end of the tester (2), and a heating furnace (4) corresponding to the rotor (3) being disposed on the inner side of the support (1); characterized in that: The bottom surface of the tester (2) is symmetrically provided with two sets of protective components (5) for protecting the rotor (3); the bottom surface of the tester (2) is provided with a driving component (6) for driving the two sets of protective components (5); the bottom surface of the tester (2) is provided with an anti-drip component (7) for preventing asphalt dripping. The protective assembly (5) includes a fixed plate (51) fixedly installed on the bottom surface of the tester (2), a shaft (52) is rotatably installed on the side of the fixed plate (51), a rotating rod (53) is fixedly fitted on the shaft (52), a support rod (54) is rotatably installed at the bottom end of the rotating rod (53), and a protective shell (55) corresponding to the rotor (3) is fixedly installed on the bottom outer wall of the support rod (54). The anti-drip component (7) includes a gear (71) fixedly mounted on the outer wall of the top of the support rod (54), and a vertical rod (72) is fixedly mounted on the bottom surface of the tester (2). An arc-shaped rack (73) that meshes with the gear (71) is fixedly mounted on the bottom end of the vertical rod (72). The arc-shaped rack (73) is coaxial with the shaft (52).

2. The asphalt viscosity testing device for road construction according to claim 1, characterized in that: A sealing insert (56) is fixedly installed on the bottom side of one of the two protective shells (55), and a sealing slot (57) corresponding to the sealing insert (56) is opened on the bottom side of the other protective shell (55).

3. The asphalt viscosity testing device for road construction according to claim 2, characterized in that: The inner side of the protective shell (55) is filled with a thermal insulation material layer (58).

4. The asphalt viscosity testing device for road construction according to claim 1, 2, or 3, characterized in that: The drive assembly (6) includes a slot (61) formed on the bottom surface of the tester (2); a drive screw (62) is rotatably mounted on the inner wall of the slot (61), and two guide blocks (63) are symmetrically screwed onto the outer wall of the drive screw (62), and the guide blocks (63) are slidably connected to the inner wall of the slot (61). The threads on the outer walls of the two sides of the drive screw (62) are opposite in direction. A connecting rod (64) is fixedly mounted on the bottom surface of the guide block (63). A drive rack (65) is fixedly mounted on the end of the connecting rod (64) away from the guide block (63). The end of the shaft (52) passes through the side of the fixed plate (51) and is fixedly mounted with a transmission gear (66) that meshes with the drive rack (65). A servo motor (67) whose output end is fixedly connected to the drive screw (62) is fixedly mounted on the side of the tester (2).

5. The asphalt viscosity testing device for road construction according to claim 4, characterized in that: Both sets of protective components (5) are provided with auxiliary installation components (8) for installing rotor (3); the auxiliary installation components (8) include an elastic support rod (81) fixedly installed on the outer wall of the support rod (54), a semi-circular plate (82) is fixedly installed on the telescopic end of the elastic support rod (81), a guide groove (83) is opened on the inner wall of the semi-circular plate (82), a transmission semi-circular plate (84) is slidably installed on the inner wall of the guide groove (83), a clamping frame (85) is fixedly installed on the inner wall of the transmission semi-circular plate (84), and a clamping piece (86) is slidably installed on the inner wall of the clamping frame (85).

6. The asphalt viscosity testing device for road construction according to claim 5, characterized in that: The auxiliary installation assembly (8) is provided with an operating component (9) for driving the auxiliary installation assembly (8); the operating component (9) includes a connecting box (91) fixedly installed on the outer wall of the semi-circular plate (82), a rotating shaft (92) is rotatably installed on the inner wall of the connecting box (91), a drive wheel (93) is fixedly installed at the bottom end of the rotating shaft (92), and a clearance opening (94) communicating with the guide groove (83) is opened on the outer wall of the semi-circular plate (82), and the drive wheel (93) The shaft (92) passes through the clearance opening (94) and fits against the outer wall of the transmission semicircular plate (84). A winding reel (95) is fixedly fitted on the outer wall of the shaft (92). A pull rope (96) is provided on the inner side of the winding reel (95). A torsion spring (98) is fitted on the top of the shaft (92). The two ends of the torsion spring (98) are fixedly connected to the shaft (92) and the connecting box (91) respectively. A limiting component (10) adapted to the shaft (92) is provided on the inner top surface of the connecting box (91).

7. The asphalt viscosity testing device for road construction according to claim 6, characterized in that: The limiting component (10) includes a ratchet (101) fixedly mounted on the top of the rotating shaft (92). An operating rod (102) is provided through the top surface of the connecting box (91). A pawl (103) that meshes with the ratchet (101) is fixedly installed at the bottom end of the operating rod (102). A torsion spring (104) is mounted on the outer wall of the operating rod (102), and both ends of the torsion spring (104) are fixedly connected to the operating rod (102) and the connecting box (91) respectively.

8. The asphalt viscosity testing device for road construction according to claim 6, characterized in that: The pulling end of the pull rope (96) passes through the side of the connecting box (91) and is fixedly installed with a pull ring (97).

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