Constant-temperature shear test device for modified asphalt

Abstract

The utility model discloses a constant-temperature shear test device for modified asphalt, belongs to the technical field of asphalt shear tests, and aims to solve the problem that the temperature of the conventional modified asphalt is gradually lost to easily cause asphalt aging when the shear test is carried out, so that the stable proceeding of the shear test is influenced. The device comprises a frame body unit, a lifting unit, a shearing unit and a blast constant-temperature drying box body, the blast constant-temperature drying box body is arranged in the frame body unit, the lifting unit is arranged on the rear side of the blast constant-temperature drying box body, the bottom of the lifting unit is fixedly connected with the frame body unit, and the shearing unit is arranged above the blast constant-temperature drying box body. The shearing unit is detachably connected with the lifting end of the lifting unit, the working end of the shearing unit sequentially penetrates through the frame body unit and a ventilation opening in the top of the blast constant-temperature drying box body and is inserted into the blast constant-temperature drying box body, and a working gap is formed between the working end of the shearing unit and the blast constant-temperature drying box body. The device is mainly used for carrying out the shear test on the modified asphalt.

Description

Technical Field

[0001] The utility model belongs to the technical field of asphalt shear test, and in particular relates to a modified asphalt constant temperature shear test device. Background Art

[0002] In the asphalt mixture proportion experiment, it is necessary to conduct asphalt shear test to study the influence of different formulas, ingredients and preparation processes on the performance of asphalt mixture, so as to optimize the mixture formula and improve the performance and durability of the road surface. In the production process, the base asphalt needs to be placed in an oven and heated at 150°C to make the asphalt have better fluidity; weigh the admixture ingredients according to the designed dosage; keep the asphalt at 185°C ~ 195°C, use a high-speed shearing machine, and slowly pour the weighed active rubber into the heated asphalt in batches, and stir continuously for 60 to 90 minutes. The temperature of the existing equipment gradually loses during the continuous stirring process, which is easy to cause asphalt aging, thereby affecting the stable progress of the shear test. Therefore, it is in line with practical needs to develop a modified asphalt constant temperature shear test device to solve the problem of temperature loss in asphalt shear test. Utility Model Content

[0003] The utility model provides a constant temperature shear test device for modified asphalt to solve the problem that the temperature of the existing modified asphalt gradually decreases during the shear test, which easily causes asphalt aging, thereby affecting the stable performance of the shear test.

[0004] A modified asphalt constant temperature shear test device, the test device comprises a frame unit, a lifting unit, a shear unit and a blast constant temperature drying box, the blast constant temperature drying box is arranged in the frame unit, the lifting unit is arranged at the rear side of the blast constant temperature drying box, and the bottom of the lifting unit is fixedly connected to the frame unit, the shear unit is arranged above the blast constant temperature drying box, and the shear unit is detachably connected to the lifting end of the lifting unit, the working end of the shear unit passes through the frame unit and the vents on the top of the blast constant temperature drying box in turn and is inserted into the blast constant temperature drying box, and a working gap is provided between the working end of the shear unit and the blast constant temperature drying box;

[0005] Further, the frame unit includes a bottom plate, a top plate and two vertical plates, the top plate is arranged above the bottom plate, and the top plate is arranged parallel to the bottom plate, the length and width of the top plate are smaller than the length and width of the bottom plate, the two vertical plates are arranged parallel and oppositely between the bottom plate and the top plate along the center line of the length direction of the bottom plate, and the top of each vertical plate is fixedly connected to the top plate, and the bottom of each vertical plate is fixedly connected to the bottom plate, the blast constant temperature drying box is arranged in a rectangular space surrounded by the bottom plate, the top plate and the two vertical plates, and the blast constant temperature drying box is arranged on the bottom plate, a working through hole is processed on the top plate, and the working through hole is coaxially arranged with the ventilating port on the top of the blast constant temperature drying box;

[0006] Further, the lifting unit includes a lifting motor and a shearing unit mounting assembly, the lifting motor is arranged on the bottom plate in the vertical direction, and the fixing part of the lifting motor is fixedly connected to the bottom plate, the shearing unit mounting assembly is fixedly connected to the movable lifting part of the lifting motor, the shearing unit is arranged on the shearing unit mounting assembly, and the shearing unit is detachably connected to the shearing unit mounting assembly;

[0007] Furthermore, the shearing unit installation assembly includes a motor bracket, a vertical block, a connecting arm and a reinforcing arm, the vertical block is fixedly connected to the movable lifting part of the lifting motor in the vertical direction, the motor bracket is arranged above the top plate, the connecting arm is arranged between the motor bracket and the vertical block, and one end of the connecting arm is fixedly connected to the motor bracket, and the other end of the connecting arm is fixedly connected to the lower part of the vertical block, the reinforcing arm is arranged between the vertical block and the connecting arm, and the vertical block, the connecting arm and the reinforcing arm are arranged in a right-angled triangle structure, one end of the reinforcing arm is fixedly connected to the upper part of the vertical block, and the other end of the reinforcing arm is fixedly connected to the top of the connecting arm near one end of the motor bracket, the shearing unit is arranged on the motor bracket, and the shearing unit is detachably connected to the motor bracket;

[0008] Further, the shearing unit includes a rotating shaft, an end working head and a power motor, the power motor is inverted on the motor bracket, and the housing of the power motor is detachably connected to the motor bracket, the power output shaft of the power motor extends to the bottom of the motor bracket, the rotating shaft is arranged below the power motor in the vertical direction, and the top end of the rotating shaft is detachably connected to the power output shaft of the power motor through a coupling, the bottom end of the rotating shaft passes through the working through hole and the vent in sequence and extends to the blast constant temperature drying box, the end working head is arranged in the blast constant temperature drying box, and the end working head is detachably connected to the end working head end;

[0009] Furthermore, an exhaust blocking sleeve is provided at the vent of the blast constant temperature drying box, the lower part of the exhaust blocking sleeve is inserted into the vent of the blast constant temperature drying box, and the exhaust blocking sleeve is threadedly detachably connected to the blast constant temperature drying box, the rotating shaft passes through the exhaust blocking sleeve and extends into the blast constant temperature drying box, and a gap is provided between the exhaust blocking sleeve and the rotating shaft;

[0010] Furthermore, the exhaust plugging sleeve is a split structure, and the exhaust plugging sleeve includes two half shells, which are assembled to form a complete sleeve structure, and a group of magnetic sheets are fixed on the connecting side of each half shell and the other half shell, and the two half shells are assembled by adsorption of the two groups of magnetic sheets;

[0011] Further, the half shell includes a straight cylinder half shell portion and a conical cylinder half shell portion, the straight cylinder half shell portion is inserted into the vent of the blast constant temperature drying box, the conical cylinder half shell portion is inverted on the top of the straight cylinder half shell portion, and the size of the small end of the conical cylinder half shell portion is the same as that of the straight cylinder half shell portion, and the straight cylinder half shell portion and the conical cylinder half shell portion are integrally formed and arranged;

[0012] Furthermore, both the straight cylinder half shell portion and the conical cylinder half shell portion are hollow structures, a bottom ventilation plate is embedded in the bottom of the straight cylinder half shell portion, and the bottom ventilation plate is fixedly connected to the inner wall of the straight cylinder half shell portion, a plurality of bottom ventilation holes are equidistantly processed on the bottom ventilation plate along the direction of extension of the curvature of the bottom ventilation plate, a middle ventilation plate is embedded in the top of the straight cylinder half shell portion, and the middle ventilation plate is fixedly connected to the inner wall of the straight cylinder half shell portion, a plurality of middle ventilation holes are equidistantly processed on the middle ventilation plate along the direction of extension of the curvature of the middle ventilation plate, and each middle ventilation hole is coaxially arranged corresponding to a bottom ventilation hole, an upper ventilation plate is embedded in the top of the conical cylinder half shell portion, and the upper ventilation plate is fixedly connected to the inner wall of the conical cylinder half shell portion, a plurality of upper ventilation holes are equidistantly processed on the upper ventilation plate along the direction of extension of the curvature of the upper ventilation plate, and each upper ventilation hole is arranged corresponding to a middle ventilation hole;

[0013] Furthermore, an adjustable cover plate is also provided on the exhaust sealing sleeve, and the adjustable cover plate is arranged on the top of the upper ventilation plate. The adjustable cover plate is a split structure, and the adjustable cover plate includes two adjustable half covers. The two adjustable half covers are assembled to form a complete cover structure, and a group of magnetic suction sheets are fixedly connected to the connecting side of each adjustable half cover and the other adjustable half cover, and the two adjustable half covers are adsorbed and assembled by the two groups of magnetic suction sheets. A plurality of top cover ventilation holes are equidistantly processed on each adjustable half cover along the extension direction of the arc of the adjustable half cover, and each top cover ventilation hole is arranged corresponding to an upper ventilation hole, and the size of the top cover ventilation hole is larger than that of the upper ventilation hole, and an adjusting column is provided on one adjusting half cover in the vertical direction, and the bottom end of the adjusting column is fixedly connected to the adjusting half cover;

[0014] The beneficial effects of this application compared to the prior art are as follows:

[0015] The modified asphalt constant temperature shear test device proposed in the present application organically combines the blast constant temperature drying box and the asphalt shearing structure to realize constant temperature control during high-speed shearing of the modified asphalt, thereby avoiding the aging of the asphalt due to heat loss, and greatly improving the shearing efficiency. The idea of ​​combining the two in the present application is that the top of the existing blast constant temperature drying box is provided with a ventilating port, and the ventilating port provides an extension space for the power end of the shearing structure. The rotating shaft in the shearing structure can enter the blast constant temperature drying box through the ventilating port, and the blast constant temperature drying box provides a good constant temperature environment for the modified asphalt shearing test. In addition, this design does not require structural changes to the blast constant temperature drying box. When the shearing test is not performed, the blast constant temperature drying box can be used alone, and will not affect the function of the blast constant temperature drying box itself, so that the device has better working flexibility.

[0016] The present application proposes a modified asphalt constant temperature shear test device. Considering that the function of the vent in the blast constant temperature drying box is to release the pressure by opening the vent when the internal pressure of the blast constant temperature drying box is too high, the safety of the blast constant temperature drying box can be ensured. However, the vent is in a closed state under normal conditions. Since the vent is used as the insertion path of the rotating shaft in the shear structure in the research and development of the present application, the traditional blocking structure cannot be used. Based on the working characteristics of the present application, a detachable and assembled spliced ​​blocking structure is developed at the same time. The spliced ​​blocking structure and the blast constant temperature drying box are installed in a threaded disassembly connection manner, which is convenient for the installation and disassembly of the blocking structure. The blocking structure is a sleeve part. When working, it is sleeved on the rotating shaft, and a rotation gap is provided between the two, which will not affect the normal operation of the rotating shaft. A cover plate is provided on the top of the sealing structure. The working state of the sealing structure is adjusted by adjusting the positional relationship between the cover plate and the exhaust hole on the top of the sealing structure, so that it is in a closed state under normal conditions and in an open state during pressure relief. Since the rotation gap between the sealing structure and the rotating shaft is small, it will not cause heat loss in the blast constant temperature drying box. Through the design of the spliced ​​sealing structure, the vent can be used as a path for the rotating shaft to be inserted while retaining the original pressure relief and closing functions, which effectively avoids the heat loss of the blast constant temperature drying box during operation and ensures the working stability of the blast constant temperature drying box. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the main view of the test device described in this application;

[0018] Figure 2 A schematic side view of the test device described in this application;

[0019] Figure 3 It is a main cross-sectional schematic diagram of the test device described in this application;

[0020] Figure 4 This is a schematic diagram of the working state of the test device described in this application;

[0021] Figure 5 This is a schematic diagram of the main view of the exhaust plugging sleeve in the test device described in this application;

[0022] Figure 6 This is a main cross-sectional schematic diagram of the exhaust plugging sleeve in the test device described in this application;

[0023] Figure 7 This is a top view of the exhaust plugging sleeve in the test device described in this application (when the adjustment cover is not installed);

[0024] Figure 8 It is a bottom view schematic diagram of the exhaust plugging sleeve in the test device described in this application;

[0025] Fig. 9A schematic top view of an adjustable cover plate in the test device described in this application;

[0026] Fig.10 This is a top view of the exhaust plugging sleeve in the test device described in this application (when the adjustable cover is installed and in the exhaust state);

[0027] Fig.11 A top view of the exhaust plugging sleeve in the test device described in this application (when the adjustable cover is installed and in the plugging state)

[0028] Fig.12 It is a top view schematic diagram of the exhaust plugging sleeve in the test device described in this application in a separated state;

[0029] Fig.13 It is a bottom view schematic diagram of the exhaust plugging sleeve in the test device described in the present application in a separated state;

[0030] In the figure, 1 is a bottom plate, 2 is a vertical plate, 3 is a top plate, 4 is a blast constant temperature drying box, 5 is an exhaust blocking sleeve, 51 is a half shell, 511 is a straight cylinder half shell, 512 is a conical cylinder half shell, 513 is a bottom ventilation plate, 514 is a middle ventilation plate, 515 is an upper ventilation plate, 516 is an upper ventilation hole, 517 is a bottom ventilation hole, 518 is a middle ventilation hole, 52 is a magnetic sheet, 53 is an adjustment cover plate, 531 is a top cover ventilation hole, 532 is an adjustment column, 6 is a rotating shaft, 7 is a motor bracket, 8 is a lifting motor, 9 is a vertical block, 10 is a connecting arm, 11 is a reinforcement arm, 12 is a terminal working head, 13 is a power motor and 14 is a reaction container. DETAILED DESCRIPTION

[0031] Specific implementation method 1: Combination Figures 1 to 13 To explain the present embodiment, a modified asphalt constant temperature shear test device is provided in the present embodiment, the test device includes a frame unit, a lifting unit, a shear unit and a blast constant temperature drying box 4, the blast constant temperature drying box 4 is arranged in the frame unit, the lifting unit is arranged on the rear side of the blast constant temperature drying box 4, and the bottom of the lifting unit is fixedly connected to the frame unit, the shear unit is arranged above the blast constant temperature drying box 4, and the shear unit is detachably connected to the lifting end of the lifting unit, the working end of the shear unit passes through the vents on the frame unit and the top of the blast constant temperature drying box 4 in sequence and is inserted into the blast constant temperature drying box 4, and a working gap is provided between the working end of the shear unit and the blast constant temperature drying box 4.

[0032] The modified asphalt constant temperature shear test device provided in this embodiment organically combines the blast constant temperature drying box and the asphalt shear structure to achieve constant temperature control during high-speed shearing of the modified asphalt, avoiding aging of the asphalt due to heat loss, and greatly improving the shear efficiency.

[0033] Specific implementation method 2: Combination Figures 1 to 3This embodiment is described. The difference between this embodiment and the first embodiment is that the frame unit includes a bottom plate 1, a top plate 3 and two vertical plates 2. The top plate 3 is arranged above the bottom plate 1 and is arranged parallel to the bottom plate 1. The length and width of the top plate 3 are smaller than the length and width of the bottom plate 1. The two vertical plates 2 are arranged parallel to and opposite to each other between the bottom plate 1 and the top plate 3 along the center line of the length direction of the bottom plate 1. The top of each vertical plate 2 is fixedly connected to the top plate 3, and the bottom of each vertical plate 2 is fixedly connected to the bottom plate 1. The blast constant temperature drying box 4 is arranged in a rectangular space surrounded by the bottom plate 1, the top plate 3 and the two vertical plates 2, and the blast constant temperature drying box 4 is arranged on the bottom plate 1. A working through hole is processed on the top plate 3, and the working through hole is arranged coaxially with the ventilating port on the top of the blast constant temperature drying box 4. Other components and connection methods are the same as those of the first embodiment.

[0034] In this embodiment, the frame unit serves as a placement unit for the blast constant temperature drying box 4 and is used to hold the blast constant temperature drying box 4. The working through hole on the top plate 3 is used to ensure the integrity of the insertion path of the working axis in the shearing unit to avoid interference when the shearing unit is working.

[0035] Specific implementation method three: Combination Figures 1 to 13 This embodiment is described. The difference between this embodiment and the second embodiment is that the lifting unit includes a lifting motor 8 and a shearing unit installation assembly. The lifting motor 8 is arranged on the bottom plate 1 in the vertical direction, and the fixed part of the lifting motor 8 is fixedly connected to the bottom plate 1. The shearing unit installation assembly is fixedly connected to the movable lifting part of the lifting motor 8. The shearing unit is arranged on the shearing unit installation assembly, and the shearing unit is detachably connected to the shearing unit installation assembly. The other components and connection methods are the same as those of the second embodiment.

[0036] Specific implementation method four: Combination Figures 1 to 13 This embodiment is described. The difference between this embodiment and the third embodiment is that the shearing unit installation assembly includes a motor bracket 7, a vertical block 9, a connecting arm 10 and a reinforcing arm 11. The vertical block 9 is fixedly connected to the movable lifting part of the lifting motor 8 in the vertical direction. The motor bracket 7 is arranged above the top plate 3. The connecting arm 10 is arranged between the motor bracket 7 and the vertical block 9. One end of the connecting arm 10 is fixedly connected to the motor bracket 7, and the other end of the connecting arm 10 is fixedly connected to the lower part of the vertical block 9. The reinforcing arm 11 is arranged between the vertical block 9 and the connecting arm 10. The vertical block 9, the connecting arm 10 and the reinforcing arm 11 are arranged in a right triangle structure. One end of the reinforcing arm 11 is fixedly connected to the upper part of the vertical block 9, and the other end of the reinforcing arm 11 is fixedly connected to the top of the connecting arm 10 near one end of the motor bracket 7. The shearing unit is arranged on the motor bracket 7, and the shearing unit is detachably connected to the motor bracket 7. Other components and connection methods are the same as those of the third embodiment.

[0037] In combination with the description of specific embodiments three and four, the lifting motor 8 is used as the main power component to realize the lifting action, which is used to carry the shearing unit installation assembly and drive the shearing unit installation assembly to move synchronously. The motor bracket 7 in the shearing unit installation assembly is used as the bearing component of the shearing unit. The connection structure composed of the vertical block 9, the connecting arm 10 and the reinforcement arm 11 is used to connect the motor bracket 7 with the lifting end of the lifting motor 8. The connection structure composed of the vertical block 9, the connecting arm 10 and the reinforcement arm 11 is a right triangle. The working strength of the connecting arm 10 is improved by setting the reinforcement arm 11, which can effectively avoid the breakage of the connecting arm 10 during operation, thereby ensuring the stability of the shearing unit during the lifting process.

[0038] Specific implementation method five: Combination Figures 1 to 13 This embodiment is described. The difference between this embodiment and the fourth embodiment is that the shearing unit includes a rotating shaft 6, a terminal working head 12 and a power motor 13. The power motor 13 is inverted on the motor bracket 7, and the housing of the power motor 13 is detachably connected to the motor bracket 7. The power output shaft of the power motor 13 extends to the bottom of the motor bracket 7. The rotating shaft 6 is arranged below the power motor 13 in the vertical direction, and the top of the rotating shaft 6 is detachably connected to the power output shaft of the power motor 13 through a coupling. The bottom end of the rotating shaft 6 passes through the working through hole and the vent in turn and extends to the blast constant temperature drying box 4. The terminal working head 12 is arranged in the blast constant temperature drying box 4, and the terminal working head 12 is detachably connected to the end of the terminal working head 12. Other components and connection methods are the same as those of the fourth embodiment.

[0039] In the present embodiment, the shear unit serves as the main execution unit of the shear test, and provides shear force to the modified asphalt during the test. Considering that the size of the ventilating port on the constant temperature drying box 4 is smaller than the size of the terminal working head 12, the shear unit in the present embodiment adopts an assembled structural design, in which the terminal working head 12 and the rotating shaft 6 are detachably connected. When the end of the rotating shaft 6 extends to the constant temperature drying box 4, the terminal working head 12 is installed. This can effectively avoid assembly interference of the test device.

[0040] Specific implementation method six: Combination Figures 1 to 13 This embodiment is described. The difference between this embodiment and the specific embodiment 5 is that an exhaust air blocking sleeve 5 is provided at the vent of the blast constant temperature drying box 4, the lower part of the exhaust air blocking sleeve 5 is inserted into the vent of the blast constant temperature drying box 4, and the exhaust air blocking sleeve 5 is threadedly detachably connected to the blast constant temperature drying box 4, the rotating shaft 6 passes through the exhaust air blocking sleeve 5 and extends into the blast constant temperature drying box 4, and a gap is provided between the exhaust air blocking sleeve 5 and the rotating shaft 6. Other components and connection methods are the same as those of the specific embodiment 5.

[0041] In this embodiment, the exhaust sealing sleeve 5 is designed based on the special function of the vents on the blast constant temperature drying box 4 in this application. The lower outer cylindrical surface of the exhaust sealing sleeve 5 is processed with an external thread that cooperates with the internal thread on the inner wall of the vent. The exhaust sealing sleeve 5 is detachably connected to the blast constant temperature drying box 4 through the thread, which improves the replaceability of the components and facilitates subsequent disassembly and maintenance.

[0042] Specific implementation method seven: Combination Figures 1 to 13 This embodiment is described. The difference between this embodiment and the sixth embodiment is that the exhaust plugging sleeve 5 is a split structure. The exhaust plugging sleeve 5 includes two half shells 51. The two half shells 51 are assembled to form a complete sleeve structure. A group of magnetic sheets 52 are fixedly connected to the connection side of each half shell 51 with the other half shell 51. The two half shells 51 are assembled by adsorption of the two groups of magnetic sheets 52. Other components and connection methods are the same as those of the fifth embodiment.

[0043] In the present embodiment, the exhaust sealing sleeve 5 is a split structure. The advantage of the split structure is that when it is damaged or blocked during subsequent use, the exhaust sealing sleeve 5 can be replaced without pulling out the rotating shaft 6. The specific disassembly process is to first reversely screw the exhaust sealing sleeve 5 to separate the exhaust sealing sleeve 5 from the blast constant temperature drying box 4. At this time, the exhaust sealing sleeve 5 is only in a state of being sleeved on the rotating shaft 6. The two half shells 51 are pulled by external force. When the pulling force is greater than the magnetic attraction force, the exhaust sealing sleeve 5 can be separated. Compared with the integrated exhaust sealing sleeve 5, this design The sealing sleeve 5 makes the replacement process more convenient. For the integrated exhaust sealing sleeve 5, it is necessary to first disassemble the end working head 12 in the blast constant temperature drying box 4, and then use the lifting motor 8 to drive the power motor 13 and the rotating shaft 6 to pull out the blast constant temperature drying box 4, and ensure that the end of the rotating shaft 6 is much higher than the exhaust sealing sleeve 5 before the exhaust sealing sleeve 5 can be replaced. This not only increases the replacement time of the exhaust sealing sleeve 5, but also has certain requirements on the working formation of the lifting motor 8, which invisibly increases the manufacturing cost and maintenance cost of the device.

[0044] Specific implementation method eight: Combination Figures 1 to 13 This embodiment is described. The difference between this embodiment and the seventh embodiment is that the half shell 51 includes a straight half shell 511 and a conical half shell 512. The straight half shell 511 is inserted into the vent of the blast constant temperature drying box 4, and the conical half shell 512 is inverted on the top of the straight half shell 511. The size of the small end of the conical half shell 512 is the same as that of the straight half shell 511. The straight half shell 511 and the conical half shell 512 are integrally formed. Other components and connection methods are the same as those of the fifth embodiment.

[0045] Specific implementation method nine: Combination Figures 1 to 13The present embodiment is described. The present embodiment is different from the specific embodiment 8 in that the straight cylinder half shell portion 511 and the conical cylinder half shell portion 512 are both hollow structures. A bottom ventilation plate 513 is embedded at the bottom of the straight cylinder half shell portion, and the bottom ventilation plate 513 is fixedly connected to the inner wall of the straight cylinder half shell portion. A plurality of bottom ventilation holes 517 are equidistantly processed on the bottom ventilation plate 513 along the arc extension direction of the bottom ventilation plate 513. A middle ventilation plate 514 is embedded at the top of the straight cylinder half shell portion, and the middle ventilation plate 514 is fixedly connected to the inner wall of the straight cylinder half shell portion. A plurality of middle ventilation holes 518 are processed equidistantly on the plate 514 along the arc extension direction of the middle ventilation plate 514, and each middle ventilation hole 518 is coaxially arranged with a bottom ventilation hole 517. An upper ventilation plate 515 is embedded on the top of the cone cylinder half shell 512, and the upper ventilation plate 515 is fixedly connected to the inner wall of the cone cylinder half shell 512. A plurality of upper ventilation holes 516 are processed equidistantly on the upper ventilation plate 515 along the arc extension direction of the upper ventilation plate 515, and each upper ventilation hole 516 is arranged correspondingly with a middle ventilation hole 518. Other components and connection methods are the same as those in the fifth embodiment.

[0046] In combination with the eighth and ninth embodiments, the straight-cylinder half-shell portion 511 in the half-shell 51 is a connecting portion. When the two half-shells 51 are spliced ​​together, the two straight-cylinder half-shell portions 511 form a complete straight-cylinder portion, and an external thread is processed on the outer circumferential surface of the straight-cylinder portion to cooperate with the internal thread on the vent. The conical-cylinder half-shell portion 512 is an excessive exhaust portion. Due to the intervention of the rotating shaft 6, the original exhaust volume of the vent is reduced. When the pressure is released, the hot air is discharged from the straight-cylinder portion, which belongs to the exhaust of a small flow surface and the compressed discharge of the hot air. It will cause the local temperature to be too high and affect the service life of the structure. Therefore, an inverted cone design is adopted on the upper part of the exhaust sealing sleeve 5 to allow the hot air to have a certain release space, to have a certain buffering effect on the hot air, to avoid heat concentration and to improve the service life of the structure. When the two half-shells 51 are spliced ​​together, the two conical-cylinder half-shell portions 512 form a complete conical-cylinder portion. A total of three conical-cylinder portions are arranged between the straight-cylinder portion and the conical-cylinder portion. Annular ventilation plates, each of which is processed with corresponding ventilation holes. The three annular ventilation plates are respectively composed of two bottom ventilation plates 513, two middle ventilation plates 514 and two upper ventilation plates 515. Since the interior of the exhaust sealing sleeve 5 is a hollow structure, three annular ventilation plates are arranged to reinforce the internal structure of the exhaust sealing sleeve 5 to improve the stability of the exhaust sealing sleeve 5 as a whole. The ventilation holes on the three annular ventilation plates form an exhaust path that can effectively discharge high-temperature and high-pressure gases to the outside of the blast constant temperature drying box 4 to ensure the working stability of the device. The structure of the integrated exhaust sealing sleeve 5 is consistent with the split structure. The difference is that the integrated exhaust sealing sleeve 5 is composed of a complete straight cylinder part and a conical cylinder part, and the three annular ventilation plates are also complete. The three annular ventilation plates also serve as connecting parts between the inner and outer sleeves of the straight cylinder part and the conical cylinder part, thereby ensuring the integrity of the structure.

[0047] Specific implementation method ten: Combination Figures 1 to 13 This embodiment is described. The difference between this embodiment and the ninth embodiment is that an adjustable cover plate 53 is also provided on the exhaust plugging sleeve 5. The adjustable cover plate 53 is arranged on the top of the upper ventilation plate 515. The adjustable cover plate 53 is a split structure. The adjustable cover plate 53 includes two adjustable half covers. The two adjustable half covers are assembled to form a complete cover structure. A group of magnetic suction sheets are fixedly connected to the connection side of each adjustable half cover and the other adjustable half cover. The two adjustable half covers are assembled by adsorption of the two groups of magnetic suction sheets. Each adjustable half cover is equidistantly processed with a plurality of top cover ventilation holes 531 along the extension direction of the arc of the adjustable half cover, and each top cover ventilation hole 531 is arranged corresponding to an upper ventilation hole 516. The size of the top cover ventilation hole 531 is larger than the size of the upper ventilation hole 516. An adjustable half cover is provided with an adjusting column 532 in the vertical direction, and the bottom end of the adjusting column 532 is fixedly connected to the adjusting half cover. The other components and connection methods are the same as those of the fifth embodiment.

[0048] In this embodiment, the adjustable cover plate 53 is used to control the exhaust volume in the exhaust sealing sleeve 5. An annular extension edge is provided on the top of the exhaust sealing sleeve 5 to limit the circumferential position of the adjustable cover plate 53. The adjustable cover plate 53 is driven to rotate by the adjusting column 532 to adjust the overlapping position of the top cover vent hole 531 and the upper vent hole 516. When pressure relief is not required, the working state of the adjustable cover plate 53 is as follows: Fig.11 As shown, the top cover vent 531 and the upper vent 516 are arranged in a staggered manner. The upper vent 516 is shielded by adjusting the solid part of the cover plate 53. When pressure relief is required, the working state of the cover plate 53 is adjusted as shown in FIG. Fig.10 As shown, the top cover ventilation hole 531 and the upper ventilation hole 516 are arranged in alignment, and the hot air in the exhaust sealing sleeve 5 is discharged into the atmosphere through the top cover ventilation hole 531.

[0049] The present invention has been disclosed as above with preferred implementation cases, but it is not used to limit the present invention. Any technician familiar with the profession can make some changes or modifications to equivalent implementation cases with equivalent changes by using the above-disclosed structures and technical contents without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above implementation cases based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

[0050] How it works

[0051] When the present application is working, different arrangements are provided according to the structure of the selected exhaust plugging sleeve 5:

[0052] When the exhaust air blocking sleeve 5 is an integrated structure, first assemble the bottom plate 1, the vertical plate 2, the top plate 3, the blast constant temperature drying box 4, the motor bracket 7, the lifting motor 8, the vertical block 9, the connecting arm 10 and the reinforcing arm 11 according to the connection relationship in the specific implementation method, screw the integrated exhaust air blocking sleeve 5 on the vent of the blast constant temperature drying box 4 through threads, install the rotating shaft 6 on the output shaft of the power motor 13, and at the same time, install the rotating shaft 6 and the power motor 13 as a whole upside down on the motor bracket 7, and ensure that the end of the rotating shaft 6 passes through the integrated exhaust air blocking sleeve 5 and extends into the blast constant temperature drying box 4, and then The end working head 12 located in the blast constant temperature drying box 4 is installed at the end of the rotating shaft 6. At the same time, the modified asphalt of the test target is placed in the reaction container 14 and then placed in the blast constant temperature drying box 4. The lifting motor 8 is controlled to drive the shearing unit to descend as a whole, and the end working head 12 is inserted into the reaction container 14. At this time, the box door of the blast constant temperature drying box 4 is closed and the power motor 13 is started to perform the shear test. The position of the regulating cover 53 is adjusted according to the pressure indication number in the blast constant temperature drying box 4, and then the working state of the exhaust plugging sleeve 5 is adjusted. When pressure relief is not required, the working state of the regulating cover 53 is as follows: Fig.11 As shown, the top cover vent 531 and the upper vent 516 are arranged in a staggered manner. The upper vent 516 is shielded by adjusting the solid part of the cover plate 53 to prevent the heat loss in the blast constant temperature drying box 4. When pressure relief is required, the working state of the cover plate 53 is adjusted as shown in FIG. Fig.10 As shown, the top cover vent 531 and the upper vent 516 are arranged in alignment, and the hot air in the exhaust blocking sleeve 5 is discharged to the atmosphere through the top cover vent 531;

[0053] When the exhaust air blocking sleeve 5 is a split structure, first assemble the bottom plate 1, the vertical plate 2, the top plate 3, the blast constant temperature drying box 4, the motor bracket 7, the lifting motor 8, the vertical block 9, the connecting arm 10 and the reinforcing arm 11 according to the connection relationship in the specific implementation mode, install the rotating shaft 6 on the output shaft of the power motor 13, and at the same time, install the rotating shaft 6 and the power motor 13 as a whole upside down on the motor bracket 7, and ensure that the end of the rotating shaft 6 passes through the integrated exhaust air blocking sleeve 5 and extends to the blast constant temperature drying box 4, and install the end working head 12 located in the blast constant temperature drying box 4 at the end of the rotating shaft 6. At this time, the two half shells 51 are spliced ​​and sleeved on Outside the rotating shaft 6, the exhaust sealing sleeve 5 composed of the two half shells 51 is integrally screwed on the vent on the blast constant temperature drying box 4. At the same time, the modified asphalt of the test target is placed in the reaction container 14 and then placed in the blast constant temperature drying box 4. The lifting motor 8 is controlled to drive the shearing unit to descend as a whole, and the end working head 12 is inserted into the reaction container 14. At this time, the door of the blast constant temperature drying box 4 is closed and the power motor 13 is started to perform the shear test. The position of the regulating cover 53 is adjusted according to the pressure indication number in the blast constant temperature drying box 4, and then the working state of the exhaust sealing sleeve 5 is adjusted. When pressure relief is not required, the working state of the regulating cover 53 is as follows: Fig.11 As shown, the top cover vent 531 and the upper vent 516 are arranged in a staggered manner. The upper vent 516 is shielded by adjusting the solid part of the cover plate 53 to prevent the heat loss in the blast constant temperature drying box 4. When pressure relief is required, the working state of the cover plate 53 is adjusted as shown in FIG. Fig.10 As shown, the top cover ventilation hole 531 and the upper ventilation hole 516 are arranged in alignment, and the hot air in the exhaust sealing sleeve 5 is discharged into the atmosphere through the top cover ventilation hole 531.

Claims

1. A modified asphalt constant temperature shear test device, characterized in that: The test device comprises a frame unit, a lifting unit, a shearing unit and a blast constant temperature drying box (4); the blast constant temperature drying box (4) is arranged in the frame unit; the lifting unit is arranged at the rear side of the blast constant temperature drying box (4), and the bottom of the lifting unit is fixedly connected to the frame unit; the shearing unit is arranged above the blast constant temperature drying box (4), and the lifting end of the shearing unit and the lifting unit are detachably connected; the working end of the shearing unit passes through the vents on the frame unit and the top of the blast constant temperature drying box (4) in turn and is inserted into the blast constant temperature drying box (4), and a working gap is provided between the working end of the shearing unit and the blast constant temperature drying box (4).

2. A modified asphalt constant temperature shear test device according to claim 1, characterized in that: The frame unit comprises a bottom plate (1), a top plate (3) and two vertical plates (2); the top plate (3) is arranged above the bottom plate (1) and is arranged parallel to the bottom plate (1); the length and width of the top plate (3) are smaller than the length and width of the bottom plate (1); the two vertical plates (2) are arranged parallel to and opposite to each other between the bottom plate (1) and the top plate (3) along the center line of the length direction of the bottom plate (1); the top of each vertical plate (2) is fixedly connected to the top plate (3); the bottom of each vertical plate (2) is fixedly connected to the bottom plate (1); the blast constant temperature drying box (4) is arranged in a rectangular space enclosed by the bottom plate (1), the top plate (3) and the two vertical plates (2); the blast constant temperature drying box (4) is arranged on the bottom plate (1); a working through hole is processed on the top plate (3); the working through hole is coaxially arranged with a vent at the top of the blast constant temperature drying box (4) and corresponds to the vent.

3. The modified asphalt constant temperature shear test device according to claim 1, characterized in that: The lifting unit comprises a lifting motor (8) and a shearing unit mounting assembly, wherein the lifting motor (8) is arranged on a base plate (1) in a vertical direction, and a fixed portion of the lifting motor (8) is fixedly connected to the base plate (1), the shearing unit mounting assembly is fixedly connected to a movable lifting portion of the lifting motor (8), the shearing unit is arranged on the shearing unit mounting assembly, and the shearing unit is detachably connected to the shearing unit mounting assembly.

4. A modified asphalt constant temperature shear test device according to claim 3, characterized in that: The shear unit installation assembly comprises a motor bracket (7), a vertical block (9), a connecting arm (10) and a reinforcing arm (11), wherein the vertical block (9) is fixedly connected to the movable lifting part of the lifting motor (8) in the vertical direction, the motor bracket (7) is arranged above the top plate (3), the connecting arm (10) is arranged between the motor bracket (7) and the vertical block (9), and one end of the connecting arm (10) is fixedly connected to the motor bracket (7), and the other end of the connecting arm (10) is fixedly connected to the lower part of the vertical block (9). The reinforcing arm (11) is arranged between the vertical block (9) and the connecting arm (10), and the vertical block (9), the connecting arm (10) and the reinforcing arm (11) are arranged in a right triangle structure. One end of the reinforcing arm (11) is fixedly connected to the upper part of the vertical block (9), and the other end of the reinforcing arm (11) is fixedly connected to the top of the connecting arm (10) near one end of the motor bracket (7). The shearing unit is arranged on the motor bracket (7), and the shearing unit is detachably connected to the motor bracket (7).

5. The modified asphalt constant temperature shear test device according to claim 1, characterized in that: The shearing unit comprises a rotating shaft (6), an end working head (12) and a power motor (13); the power motor (13) is inverted on a motor bracket (7), and a housing of the power motor (13) is detachably connected to the motor bracket (7); a power output shaft of the power motor (13) extends to the bottom of the motor bracket (7); the rotating shaft (6) is arranged below the power motor (13) in a vertical direction, and the top end of the rotating shaft (6) is detachably connected to the power output shaft of the power motor (13) through a coupling; the bottom end of the rotating shaft (6) passes through a working through hole and a vent in sequence and extends to a blast constant temperature drying box (4); the end working head (12) is arranged in the blast constant temperature drying box (4), and the end working head (12) is detachably connected to the end of the end working head (12).

6. A modified asphalt constant temperature shear test device according to claim 5, characterized in that: An exhaust air blocking sleeve (5) is provided at the ventilation opening of the blast constant temperature drying box (4); the lower part of the exhaust air blocking sleeve (5) is inserted into the ventilation opening of the blast constant temperature drying box (4); the exhaust air blocking sleeve (5) is threadedly detachably connected to the blast constant temperature drying box (4); the rotating shaft (6) passes through the exhaust air blocking sleeve (5) and extends into the blast constant temperature drying box (4); and a gap is provided between the exhaust air blocking sleeve (5) and the rotating shaft (6).

7. A modified asphalt constant temperature shear test device according to claim 6, characterized in that: The exhaust blocking sleeve (5) is a split structure, comprising two half shells (51), which form a complete sleeve structure after being assembled. A group of magnetic sheets (52) is fixedly connected to the connecting side of each half shell (51) with the other half shell (51), and the two half shells (51) are assembled by adsorption of the two groups of magnetic sheets (52).

8. The modified asphalt constant temperature shear test device according to claim 1, characterized in that: The half shell (51) comprises a straight cylinder half shell portion (511) and a conical cylinder half shell portion (512); the straight cylinder half shell portion (511) is inserted into the vent of the blast constant temperature drying box (4); the conical cylinder half shell portion (512) is inverted on the top of the straight cylinder half shell portion (511); and the size of the small end of the conical cylinder half shell portion (512) is the same as that of the straight cylinder half shell portion (511); the straight cylinder half shell portion (511) and the conical cylinder half shell portion (512) are integrally formed.

9. A modified asphalt constant temperature shear test device according to claim 8, characterized in that: The straight cylinder half shell (511) and the conical cylinder half shell (512) are both hollow structures. A bottom ventilation plate (513) is embedded in the bottom of the straight cylinder half shell, and the bottom ventilation plate (513) is fixedly connected to the inner wall of the straight cylinder half shell. A plurality of bottom ventilation holes (517) are equidistantly processed on the bottom ventilation plate (513) along the arc extension direction of the bottom ventilation plate (513). A middle ventilation plate (514) is embedded in the top of the straight cylinder half shell, and the middle ventilation plate (514) is fixedly connected to the inner wall of the straight cylinder half shell. A plurality of middle ventilation holes (518) are processed equidistantly in the direction of curvature extension, and each middle ventilation hole (518) is coaxially arranged correspondingly with a bottom ventilation hole (517); an upper ventilation plate (515) is embedded in the top of the conical cylinder half shell (512), and the upper ventilation plate (515) is fixedly connected to the inner wall of the conical cylinder half shell (512); a plurality of upper ventilation holes (516) are processed equidistantly in the direction of curvature extension of the upper ventilation plate (515), and each upper ventilation hole (516) is arranged correspondingly with a middle ventilation hole (518).

10. The modified asphalt constant temperature shear test device according to claim 1, characterized in that: The exhaust blocking sleeve (5) is also provided with an adjustable cover plate (53), which is arranged on the top of the upper ventilation plate (515). The adjustable cover plate (53) is a split structure, and the adjustable cover plate (53) includes two adjustable half covers. The two adjustable half covers are assembled to form a complete cover structure. A group of magnetic suction sheets are fixedly connected to the connection side of each adjustable half cover and the other adjustable half cover. The two adjustable half covers are assembled by adsorption of the two groups of magnetic suction sheets. Each adjustable half cover is equidistantly processed with a plurality of top cover ventilation holes (531) along the extension direction of the arc of the adjustable half cover, and each top cover ventilation hole (531) is arranged corresponding to an upper ventilation hole (516). The size of the top cover ventilation hole (531) is larger than the size of the upper ventilation hole (516). An adjustable half cover is provided with an adjusting column (532) in the vertical direction, and the bottom end of the adjusting column (532) is fixedly connected to the adjustable half cover.

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