Asphalt low-temperature elongation testing device

Abstract

The invention provides an asphalt low-temperature extension testing device, which relates to the field of asphalt extension testing, and comprises a testing box body, a storage cylinder and a discharging baffle cylinder, a test cavity is formed in the middle of the top of the test box body, two sets of racks are arranged on the inner side of the test cavity, linkage gears are installed between the middle part and the two end parts of the movable test table through rotating shafts respectively, two sets of linkage shafts are rotatably installed between the middle part and the two end parts of the movable test table respectively, and the bottom of the storage barrel is of a conical hopper structure. Discharging blocking cylinders are arranged on the bottom sides of the storage cylinders, conical grooves are formed in the front ends of the discharging blocking cylinders, four sets of discharging holes are formed in the front ends of the discharging blocking cylinders, and the rear ends of the discharging blocking cylinders penetrate out of the test cavity in a sealed mode through rotating shafts to be connected with large gears. According to the device, the screw rod and the outer peripheries of the two groups of guide rods are cleaned in all directions, when salt needs to be added, an asphalt sample elongation test does not need to be stopped, stirring can be synchronously carried out, the salt dissolving speed is increased, and the problem that the asphalt elongation test needs to be stopped for stirring when alcohol or salt is added is solved.

Description

Technical Field

[0001] The invention relates to the technical field of asphalt extension testing, and in particular to an asphalt low-temperature elongation testing device. Background Art

[0002] The asphalt elongation test is used to determine the ductility of materials such as petroleum asphalt, liquid asphalt distillation residue and emulsified asphalt evaporation residue.

[0003] A search of the prior art revealed that, for example, the patent application number CN202011000719.7 discloses an asphalt low-temperature elongation tester, which belongs to the technical field of asphalt elongation testing devices. The tester includes a test chamber, wherein a fixed test bench and a movable test bench for testing the elongation of asphalt blocks are provided in the test chamber. The movable test bench moves horizontally and linearly in the test chamber, and the moving direction of the movable test bench is the length direction of the test chamber. The test chamber is provided with a cleaning brush for cleaning the inner wall of the test chamber and a movable plate for driving the cleaning brush to move along the length direction of the test chamber. The cleaning brush is located on one side of the movable plate, and one side of the movable plate abuts against one side of the cleaning brush. The bottom of the cleaning brush abuts against the inner bottom wall of the test chamber. A driving device for driving the movable plate to move along the length direction of the test chamber is provided between the test chamber and the movable plate. This application has the effect of facilitating the staff to clean the interior of the test chamber.

[0004] If asphalt filaments are found floating on the water surface or sinking to the bottom of the tank during the test, alcohol or salt should be added to the water, and the water density should be adjusted to be close to that of the sample before retesting. Existing asphalt elongation testers usually require manual addition of alcohol or salt, and stirring is required so that the alcohol or salt is evenly mixed in the water. At this time, the asphalt elongation test needs to be stopped, affecting the progress of the asphalt elongation test. In addition, during the asphalt elongation test, asphalt fractures or salt may adhere to the screw or guide rod, affecting the life of the screw or guide rod. Summary of the Invention

[0005] In view of this, the present invention provides an asphalt low-temperature elongation testing device, which can perform all-round cleaning on the outer periphery of the screw and two sets of guide rods, and can also perform stirring simultaneously when salt needs to be added, without stopping the asphalt sample elongation test, to increase the salt dissolution rate.

[0006] The present invention provides an asphalt low-temperature elongation test device, which specifically includes: a test box, a fixed test platform, a mobile test platform, a screw, a guide column, an asphalt end positioning structure, a storage cylinder and a discharge blocking cylinder;

[0007] A test cavity is provided in the middle of the top of the test box, and side cavities are provided on both sides of the test cavity. The middle of the bottom side of the test cavity is an inclined structure, and the two ends of the bottom side of the test cavity are respectively stepped structures, and are respectively fixed with fixed test platforms by screws. It is characterized in that the two ends of the screw are respectively light rod structures, and are rotated and sealed to pass through the test cavity, and are connected with a circular plate through the U-shaped bracket in the side cavity. A driving motor is installed in the side cavity on one side, and the driving motor is meshed with the worm gear on the screw through a worm. There are two groups of guide columns, and the two ends of the two groups of guide columns are respectively sealed to pass through the test cavity, and are fixedly connected to the inner wall of the side cavity through the U-shaped bracket in the side cavity. The middle part of the mobile test platform is meshed on the screw through the internal threaded hole, and the two ends of the mobile test platform are slidably inserted into the guide column through the through hole. The top part of the fixed test platform and the two end parts of the mobile test platform The gears are connected to each other at the two ends of the movable test bench and the gears are connected at the two ends of the movable test bench, and the gears are connected at the two ends of the movable test bench to the middle part. The middle part and the two ends of the movable test bench are respectively provided with linkage gears through rotating shafts, and two groups of linkage shafts are respectively rotatably installed. The storage cylinder is provided with two groups and respectively inserted and installed on the inner extension plate inside the test cavity, and the bottom of the storage cylinder is a cone bucket structure. The bottom side of the storage cylinder is respectively provided with a discharge blocking cylinder, and the front end of the discharge blocking cylinder is provided with a conical groove and four groups of discharge holes. The rear end of the discharge blocking cylinder is also provided with a blocking ring, and is rotatably clamped in the blocking cylinder inside the test cavity. The rear end of the discharge blocking cylinder passes through the test cavity through the rotating shaft seal and is connected to a large gear.

[0008] Optionally, two sets of stirring shafts rotate in the inclined bottom end of the test chamber, and both ends of the stirring shafts are sealed and pass through the test chamber and are connected to small gears, and the two sets of small gears on the same side are meshed with each other, and the large gear is meshed with the small gear on the lower side, and the outer end of one set of stirring shafts is also connected to a handle.

[0009] Optionally, fixed cleaning cylinders are fixed to both sides of the middle portion of the mobile test bench by screws, and bristles are provided on the inner side of the fixed cleaning cylinders, and the bristles are attached to the outer side of the screws.

[0010] Optionally, a rotating cleaning cylinder and two sets of positioning sheet covers are respectively installed on both sides of the two ends of the mobile test platform, and the rotating cleaning cylinder is rotatably mounted in the two sets of aligned positioning sheet covers, and the inner end surface of the rotating cleaning cylinder is in contact with the ball bearings embedded on the end surfaces of the two ends of the mobile test platform, and bristles are provided on the inner side of the rotating cleaning cylinder, and the bristles are attached to the outer side of the guide column.

[0011] Optionally, slots for fixing the cleaning cylinder and for inserting the rotating cleaning cylinder are respectively provided at both ends and the middle of the opposite sides of the two groups of fixed test tables.

[0012] Optionally, the asphalt end clamping structure includes a clamping column, a vertical socket, a pressure plate, a horizontal socket, a thorn cone, a U-shaped connecting frame and a threaded operating rod;

[0013] The clamping column and the U-shaped connecting frame are respectively fixed on the top of the two ends of the fixed test bench and the mobile test bench, and a vertical socket is provided on the top side of the clamping column. The pressing plate is vertically slidably installed on the U-shaped connecting frame. A horizontal socket is provided on the pressing plate. The horizontal plug-in plate in the horizontal socket is placed in the vertical socket. A thorn cone is also provided on the bottom side of the pressing plate. The threaded operating rod is threadedly installed on the U-shaped connecting frame and is in contact with the top surface of the horizontal plug-in plate.

[0014] Optionally, the two groups of linkage shafts are meshed with bevel gears and transmitted to the rotating shaft of the linkage gear, and the outer ends of the two groups of linkage shafts are rotatably connected to the rotating cleaning cylinder through transmission belts. The linkage gears are also meshed with racks respectively, and the linkage gears and the rotating shaft of the linkage gears, the two groups of linkage shafts, and the bevel gears on the rotating shaft and the linkage shaft together constitute a linkage structure.

[0015] Optionally, a rubber ring is also pasted on the outer side of the front end of the discharge blocking cylinder, and the discharge pipe at the bottom end of the storage cylinder is tightly attached to the rubber ring. The rubber ring is also provided with four groups of holes, and the four groups of holes are respectively opposite to the discharge holes.

[0016] The present invention provides an asphalt low-temperature elongation test device, which has the following beneficial effects:

[0017] When testing the low-temperature elongation of asphalt, the present invention can fully clean the outer periphery of the screw and the two sets of guide rods. When salt needs to be added, there is no need to stop the elongation test of the asphalt sample, and stirring can be performed simultaneously to increase the dissolution rate of the salt.

[0018] In addition, by setting up a fixed test bench and a mobile test bench, the holes at both ends of the asphalt sample are respectively placed on the clamping columns at both ends of the fixed test bench and the mobile test bench, and by starting the drive motor to drive the screw to rotate, the mobile test bench is moved at a constant rate in the test chamber, and the elongation of the asphalt sample is tested, and the tensile condition of the specimen is observed with the naked eye.

[0019] In addition, by installing fixed cleaning cylinders at both ends of the middle part of the mobile test platform, and rotating cleaning cylinders are respectively installed at both ends of the mobile test platform, when the mobile test platform moves at a constant rate, the outer peripheral side of the screw between the two groups of fixed test platforms can be fully cleaned, and the outer peripheral sides of the two groups of guide columns between the two groups of fixed test platforms can be fully cleaned to avoid impurities adhering to the screw or guide rod during the test.

[0020] In addition, through the two sets of storage cylinders and two sets of stirring shafts, when salt needs to be added during the test, the salt in the storage cylinder can be turned by turning one set of stirring shafts through the handle to fall into the conical groove at the front end of the discharge baffle cylinder, and fall into the water in the test chamber along the inclined structure of the conical groove. Moreover, under the action of the two sets of stirring shafts, the salt can be quickly mixed with the water in the test chamber, thereby adjusting the density of the water, and the elongation test of the asphalt sample will not be affected during the addition of salt. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram showing the overall structure of the present invention;

[0022] Figure 2 The present invention shows Figure 1 A in the middle is an enlarged structural diagram;

[0023] Figure 3 The present invention shows Figure 1 Schematic diagram of the structure from the middle and rear side;

[0024] Figure 4 The present invention shows Figure 3 The enlarged structural diagram at B in the middle;

[0025] Figure 5 The present invention shows Figure 1 Schematic diagram of the structure from above;

[0026] Figure 6 The present invention shows Figure 1 Schematic diagram of the structure of the middle clamping tube after vertical section;

[0027] Figure 7 The present invention shows Figure 1 A vertical section of the front end of the middle test chamber and a schematic diagram of the structure after the top cover of the side cavity is pulled out;

[0028] Figure 8 The figure shows a schematic structural diagram of a discharge retaining cylinder in the present invention that is connected to a large gear after being vertically cut.

[0029] Reference Signs List

[0030] 1. Test chamber; 101. Test chamber; 1011. Rack; 1012. Stirring shaft; 10121. Pinion; 102. Side chamber; 1021. U-shaped support; 103. Positioning cylinder; 2. Fixed test platform; 201. Slot; 3. Mobile test platform; 301. Fixed cleaning cylinder; 302. Rotating cleaning cylinder; 303. Positioning cover; 4. Screw; 401. Drive motor; 5. Guide column; 6. Asphalt end positioning structure; 601. Clamping column; 6011. Vertical socket; 602. Pressing plate; 6021. Horizontal socket; 6022. Thorn cone; 603. U-shaped connecting frame; 604. Threaded operating rod; 7. Linkage structure; 701. Linkage gear; 702. Linkage shaft; 8. Storage cylinder; 9. Discharge stop cylinder; 901. Discharge hole; 902. Rubber ring; 903. Positioning ring; 904. Large gear. DETAILED DESCRIPTION

[0031] In order to make the purpose, scheme and advantages of the technical solution of the present invention more clear, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of specific embodiments of the present invention. Unless otherwise specified, the terms used herein have the common meanings in the art. The same reference numerals in the drawings represent the same components.

[0032] Example: Please refer to Figures 1 to 8 :

[0033] The present invention proposes an asphalt low-temperature elongation test device, comprising: a test box 1, a fixed test platform 2, a mobile test platform 3, a screw 4, a guide column 5, an asphalt end positioning structure 6, a storage cylinder 8, and a discharge blocking cylinder 9;

[0034] A test chamber 101 is provided in the middle of the top of the test box 1, and side chambers 102 are provided on both sides of the test chamber 101. The middle of the bottom side of the test chamber 101 is an inclined structure, and the two ends of the bottom side of the test chamber 101 are step-shaped structures, and are fixed with fixed test benches 2 by screws. It is characterized in that the two ends of the screw 4 are respectively light rod structures, and rotate and seal through the test chamber 101, and pass through the U-shaped bracket 1021 in the side chamber 102 to connect with a circular plate, and a driving motor is installed in the side chamber 102 on one side. The driving motor 401 is connected to the worm gear on the screw 4 through the worm, and the guide column 5 is provided with two groups, and the two ends of the two groups of guide columns 5 are sealed and pass through the test cavity 101, and pass through the U-shaped support 1021 in the side cavity 102 and are fixedly connected to the inner wall of the side cavity 102. The middle part of the mobile test platform 3 is engaged with the screw 4 through the internal threaded hole, and the two ends of the mobile test platform 3 are slidably inserted into the guide column 5 through the through hole. The tops of the fixed test platform 2 and the two ends of the mobile test platform 3 are respectively installed with Asphalt end clamping structure 6, two sets of racks 1011 are provided inside the test chamber 101, and the two ends of the racks 1011 are fixedly connected to the inner wall of the test chamber 101, and the racks 1011 are also attached to the connecting blocks connecting the two ends and the middle part of the two sets of fixed test benches 2 and the connecting blocks connecting the two ends and the middle part of the mobile test bench 3. The middle part and the two ends of the mobile test bench 3 are respectively installed with linkage gears 701 through rotating shafts, and two sets of linkage shafts 702 are respectively installed for rotation. The storage cylinder 8 is provided There are two groups, which are respectively installed on the inner extension plate inside the test cavity 101, and the bottom of the storage cylinder 8 is a cone bucket structure. The interior of the storage cylinder 8 is filled with salt. The bottom side of the storage cylinder 8 is respectively provided with a discharge blocking cylinder 9. The front end of the discharge blocking cylinder 9 is provided with a conical groove and four groups of discharge holes 901. The rear end of the discharge blocking cylinder 9 is also provided with a clamping ring 903, and is rotatably clamped in the clamping cylinder 103 inside the test cavity 101. The rear end of the discharge blocking cylinder 9 passes through the test cavity 101 through a rotating shaft seal and is connected to a large gear 904.

[0035] Among them, such as Figure 2 As shown, fixed cleaning cylinders 301 are fixed on both sides of the middle part of the mobile test platform 3 by screws. Brushes are provided on the inner side of the fixed cleaning cylinder 301, and the bristles are attached to the outer side of the screw 4. When the mobile test platform 3 moves at a constant rate, since the screw 4 is in a rotating state, the outer peripheral side of the screw 4 between the two groups of fixed test platforms 2 can be cleaned in all directions.

[0036] Among them, such as Figure 4As shown, a rotating cleaning cylinder 302 and two sets of positioning sheet covers 303 are respectively installed on both sides of the two ends of the mobile test platform 3, and the rotating cleaning cylinder 302 is rotatably mounted in the two sets of positioning sheet covers 303, and the inner end surface of the rotating cleaning cylinder 302 is in contact with the balls embedded on the end surfaces of the two ends of the mobile test platform 3, and the inner side of the rotating cleaning cylinder 302 is provided with bristles, and the bristles are attached to the outer side of the guide column 5, and the two sets of linkage shafts 702 are meshed with the rotating shaft of the linkage gear 701 through bevel gears, and the outer ends of the two sets of linkage shafts 702 are rotatably connected with the rotating cleaning cylinder 302 through transmission belts, and the linkage gears The wheels 701 are also respectively engaged with the racks 1011, and the linkage gear 701 and the rotating shaft of the linkage gear 701, the two sets of linkage shafts 702, and the bevel gears on the rotating shaft and the linkage shaft together constitute a linkage structure 7. The linkage gear 701 is driven to rotate by the engagement with the rack 1011, and the linkage shaft 702 is driven to rotate by the engagement with the bevel gears, thereby causing the rotating cleaning cylinder 302 to rotate at both ends of the mobile test platform 3, and the outer peripheral sides of the two sets of guide columns 5 between the two sets of fixed test platforms 2 are cleaned in all directions by the bristles in the rotating cleaning cylinder 302.

[0037] Among them, such as Figure 1 and Figure 6 As shown, the two sets of fixed test tables 2 have slots 201 at both ends and in the middle on opposite sides for inserting the fixed cleaning cylinder 301 and the rotating cleaning cylinder 302 respectively. When the mobile test table 3 and the fixed test table 2 are in contact with each other on opposite sides, the fixed cleaning cylinder 301 can be inserted into the slot 201 in the middle of the fixed test table 2, and the rotating cleaning cylinder 302 and the transmission belt can be inserted into the slots 201 at both ends of the fixed test table 2.

[0038] Among them, such as Figure 2 and Figure 3 As shown, the asphalt end locking structure 6 includes a locking column 601, a vertical socket 6011, a pressure plate 602, a horizontal socket 6021, a spike 6022, a U-shaped connecting frame 603 and a threaded operating rod 604;

[0039] The clamping column 601 and the U-shaped connecting frame 603 are respectively fixed on the top of the two ends of the fixed test platform 2 and the mobile test platform 3, and the top side of the clamping column 601 is provided with a vertical socket 6011, and the pressure plate 602 is vertically slidably installed on the U-shaped connecting frame 603. A horizontal socket 6021 is provided on the pressure plate 602, and the horizontal plug in the horizontal socket 6021 is placed in the vertical socket 6011. A thorn cone 6022 is also provided on the bottom side of the pressure plate 602. The threaded operating rod 604 is threadedly installed on the U-shaped connecting frame 603 and is attached to the top surface of the horizontal plug. The holes at both ends of the asphalt sample are respectively put on the clamping columns 601 at both ends of the fixed test platform 2 and the mobile test platform 3, and the pressure plate 602 is pressed downward by rotating the threaded operating rod 604, and the two ends of the asphalt sample are further clamped by the thorn cone 6022 on the bottom side of the pressure plate 602.

[0040] Among them, such as Figure 1 、 Figure 5 and Figure 6 As shown, two sets of stirring shafts 1012 rotate in the inclined bottom end of the test chamber 101, and the two ends of the stirring shafts 1012 are sealed and pass through the test chamber 101 to be connected with small gears 10121, and the two sets of small gears 10121 on the same side are meshed with each other, and the large gear 904 is meshed with the small gear 10121 on the lower side. The outer end of one set of stirring shafts 1012 is also connected to a handle, and a rubber ring 902 is also pasted on the outer side of the front end of the discharge blocking cylinder 9, and the discharge pipe at the bottom end of the storage cylinder 8 is tightly attached to the rubber ring 902. The rubber ring 902 is also provided with four sets of holes, and the four sets of holes are respectively opposite to the discharge holes 901, and can be passed through the rubber ring 9 02 is attached to the discharge pipe at the bottom of the storage barrel 8, blocking the discharge pipe at the bottom of the storage barrel 8. When salt needs to be added, one set of stirring shafts 1012 is rotated by turning the handle, and the meshing of the small gears 10121 and the meshing between the small gear 10121 and the large gear 904 drives the other set of stirring shafts 1012 and the two sets of discharge blocking barrels 9 to rotate. When the bottom end of the cone bucket of the storage barrel 8 is opposite to the upper hole of the rubber ring 902 and the discharge hole 901 on the discharge blocking barrel 9, the salt in the storage barrel 8 can fall into the conical groove at the front end of the discharge blocking barrel 9, and fall into the water in the test chamber 101 along the inclined structure of the conical groove.

[0041] Specific usage and function of this embodiment: In the present invention, when testing the low-temperature elongation of asphalt, the holes at both ends of the asphalt sample are respectively placed on the clamping columns 601 at both ends of the fixed test platform 2 and the mobile test platform 3, and the driving motor 401 is started to rotate at a constant rate, driving the screw 4 to rotate, thereby causing the mobile test platform 3 to move at a constant rate in the test chamber 101, thereby testing the elongation of the asphalt sample, and observing the tensile condition of the specimen by the naked eye. During this process, since the screw 4 is in a rotating state, the outer circumference of the screw 4 between the two sets of fixed test platforms 2 is cleaned in all directions by the bristles in the fixed cleaning cylinder 301, and the linkage gear 701 is driven to rotate by the meshing of the linkage gear 701 and the rack 1011, and the linkage shaft 702 is driven to rotate by the meshing of the bevel gear, thereby causing the rotating cleaning cylinder 302 to rotate at both ends of the mobile test platform 3, and the outer circumference of the two sets of guide columns 5 between the two sets of fixed test platforms 2 is cleaned in all directions by the bristles in the rotating cleaning cylinder 302, so as to prevent impurities from adhering to the screw 4 or the guide rod 5 during the test;

[0042] When salt needs to be added, one set of stirring shafts 1012 is rotated by turning the handle, and the meshing of the small gears 10121 and the meshing between the small gear 10121 and the large gear 904 drives the other set of stirring shafts 1012 and the two sets of discharge baffles 9 to rotate. When the bottom end of the cone bucket of the storage cylinder 8 is opposite to the upper hole of the rubber ring 902 and the discharge hole 901 on the discharge baffle 9, the salt in the storage cylinder 8 can fall into the conical groove at the front end of the discharge baffle 9 and fall into the water in the test chamber 101 along the inclined structure of the conical groove. Moreover, under the action of the two sets of stirring shafts 1012, the salt can be quickly mixed with the water in the test chamber 101, thereby adjusting the density of the water, and the elongation test of the asphalt sample is not affected during the addition of salt.

[0043] The above description is merely an exemplary embodiment of the present invention and is not intended to limit the scope of protection of the present invention. The scope of protection of the present invention is determined by the appended claims.

Claims

1. An asphalt low-temperature elongation test device, comprising: A test box (1), a fixed test bench (2), a mobile test bench (3), a screw (4), a guide column (5), an asphalt end retaining structure (6), a storage cylinder (8) and a discharge blocking cylinder (9); The test chamber (101) is provided in the middle of the top of the test chamber (101), and side chambers (102) are provided on both sides of the test chamber (101). The middle of the bottom side of the test chamber (101) is an inclined structure, and the two ends of the bottom side of the test chamber (101) are respectively stepped structures, and are respectively fixed with a fixed test bench (2) by screws. It is characterized in that the two ends of the screw (4) are respectively a light rod structure, and are rotated and sealed to pass through the test chamber (101), and are connected to a circular plate through a U-shaped support (1021) in the side chamber (102), and a driving motor is installed in the side chamber (102) on one side. The machine (401) is provided with a driving motor (401) that is meshed with a worm gear on a screw (4) through a worm, and the guide column (5) is provided with two groups, and the two ends of the two groups of guide columns (5) are respectively sealed and passed through the test cavity (101), and are fixedly connected to the inner wall of the side cavity (102) through the U-shaped support (1021) in the side cavity (102), and the middle part of the mobile test platform (3) is meshed with the screw (4) through an internal threaded hole, and the two ends of the mobile test platform (3) are slidably inserted into the guide column (5) through the through hole, and the two ends of the fixed test platform (2) and the mobile test platform (3) are fixed. The top of each test chamber (101) is provided with an asphalt end retaining structure (6), the inside of the test chamber (101) is provided with two sets of racks (1011), and the two ends of the racks (1011) are fixedly connected to the inner wall of the test chamber (101), and the racks (1011) are also respectively attached to the connecting blocks connecting the two ends and the middle part of the two sets of fixed test platforms (2) and the connecting blocks connecting the two ends and the middle part of the mobile test platform (3), and the middle part and the two ends of the mobile test platform (3) are respectively provided with linkage gears (701) through rotating shafts, and two sets of linkage shafts (702) are respectively rotatably installed. The storage cylinder (8) is provided with two groups and is respectively inserted and installed on the inner extension plate inside the test cavity (101), and the bottom of the storage cylinder (8) is a cone bucket structure. The bottom side of the storage cylinder (8) is respectively provided with a discharge blocking cylinder (9), the front end of the discharge blocking cylinder (9) is provided with a conical groove and four groups of discharge holes (901). The rear end of the discharge blocking cylinder (9) is also provided with a clamping ring (903) and is rotatably clamped in the clamping cylinder (103) inside the test cavity (101). The rear end of the discharge blocking cylinder (9) passes through the test cavity (101) through a rotating shaft seal and is connected to a large gear (904).

2. The asphalt low temperature elongation test device according to claim 1, characterized in that: Two groups of stirring shafts (1012) rotate in the inclined bottom end of the test chamber (101), and both ends of the stirring shafts (1012) are sealed and pass through the test chamber (101) and are connected to small gears (10121). The two groups of small gears (10121) on the same side are meshed with each other, and the large gear (904) is meshed with the small gear (10121) on the lower side. The outer end of one group of stirring shafts (1012) is also connected to a handle.

3. The asphalt low temperature elongation test device according to claim 1, characterized in that: Fixed cleaning cylinders (301) are fixed to both sides of the middle portion of the mobile test platform (3) by screws, and bristles are provided on the inner side of the fixed cleaning cylinder (301), and the bristles are attached to the outer side of the screw rod (4).

4. The asphalt low temperature elongation test device according to claim 3, characterized in that: A rotating cleaning cylinder (302) and two sets of positioning sheet covers (303) are respectively installed on both sides of the two ends of the mobile test platform (3), and the rotating cleaning cylinder (302) is rotatably mounted in the two sets of aligned positioning sheet covers (303), and the inner end surface of the rotating cleaning cylinder (302) is in contact with the balls embedded in the end surfaces of the two ends of the mobile test platform (3), and bristles are provided on the inner side of the rotating cleaning cylinder (302), and the bristles are in contact with the outer side of the guide column (5).

5. The asphalt low temperature elongation test device according to claim 4, characterized in that: Notches (201) for inserting a fixed cleaning cylinder (301) and a rotating cleaning cylinder (302) are respectively provided at both ends and in the middle of the opposite sides of the two groups of fixed test tables (2).

6. The asphalt low temperature elongation testing device according to claim 1, characterized in that: The asphalt end clamping structure (6) comprises a clamping column (601), a vertical socket (6011), a pressing plate (602), a horizontal socket (6021), a thorn cone (6022), a U-shaped connecting frame (603) and a threaded operating rod (604); The clamping column (601) and the U-shaped connecting frame (603) are respectively fixed to the top of the two end portions of the fixed test platform (2) and the mobile test platform (3), and the top side of the clamping column (601) is provided with a vertical socket (6011). The pressing plate (602) is vertically slidably mounted on the U-shaped connecting frame (603). The pressing plate (602) is provided with a horizontal socket (6021). The horizontal plug in the horizontal socket (6021) is placed in the vertical socket (6011). The bottom side of the pressing plate (602) is also provided with a spike cone (6022). The threaded operating rod (604) is threadedly mounted on the U-shaped connecting frame (603) and is in contact with the top surface of the horizontal plug.

7. The asphalt low temperature elongation test device according to claim 4, characterized in that: The two groups of linkage shafts (702) are meshed with the rotating shaft of the linkage gear (701) through bevel gears for transmission, and the outer ends of the two groups of linkage shafts (702) are rotationally connected to the rotating cleaning cylinder (302) through a transmission belt. The linkage gears (701) are also meshed with the racks (1011) respectively, and the linkage gears (701) and the rotating shaft of the linkage gear (701), the two groups of linkage shafts (702), and the bevel gears on the rotating shaft and the linkage shaft together form a linkage structure (7).

8. The asphalt low temperature elongation testing device according to claim 1, characterized in that: A rubber ring (902) is also attached to the outer side of the front end of the discharge blocking cylinder (9), and the discharge pipe at the bottom end of the storage cylinder (8) is tightly attached to the rubber ring (902). The rubber ring (902) is also provided with four groups of holes, and the four groups of holes are respectively opposite to the discharge holes (901).

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